X-ray computer tomography
CT is the English abbreviation, the meaning can be expressed are: carat unit of weight of precious stones, X-ray computer tomography, clotting time, the power system current transformers, building utilities installation, Cross Stitch Fabric, resolution and so on.
directory
First, the chemical reagent II, X-ray computer tomography 1, CT of the invention 2, CT imaging of the basic principles of 3, CT equipment 4, CT image characteristics 5, CT examination Technology 6, CT diagnosis of the clinical application of 7, CT diagnostic features and advantages of 8, CT examination range of 9, CT of several important concepts 10, CT and MRI of the difference between the three, described the clotting time clotting time clotting time clotting time normal clinical significance of four, five games in the CT, current transformer in the power system six, seven buildings to install water and electricity, the instructions on the eight cross-stitch cloth CT, CT ct command service providers other abbreviations a, chemical reagents CT Catechol abbreviations, molecular formula C6H6O2 CT building one unit of carats of gem weight [1] (symbol: CT) 1 carat = 0.2 grams (200 mg) carat unit of measurement for precious stones in the existing international standard unit of measurement as it is legal conversion formula is: 1 carat = 200 milligrams = 0.2 grams of ancient times, up to several hundred years of world gem trade, countries have been accustomed to using carat jewelers as the weighing standard. The term carat originated in ancient Greek, it is a tree of the eastern Mediterranean based on the name of a translation. No precise balance in people before they have even with this very easy to get the tree without known gems as the weight of the seed, a seed 1 carat, a gem and an equal number of seeds there are that many carat weight . With the invention of the world, and the use of precision balances, countries have the carat weight is defined as the standard. Original carat weight is not the same in all countries, some countries will be 210 mg to 1 carat, and some 180 mg to 1 carat, but Britain, France and other countries provisions 1 carat is 205 milligrams. Later, in order to facilitate the conversion formula, 1 carat in 1907 to 200 mg reclassification, it was known as the metric carat. Carat gem value is to determine how much value the important factor. So, if the value of higher carat gem, the greater its value. South Africa in 1905 found a diamond, which is human in the world, the largest ever found a diamond. In our country the largest diamond preservation in 1977 found in Shandong, named Chang Lin diamonds, as a national treasure is now housed in the People's Bank of China. The weight of carats of diamonds (also known as card) basis. 1 carat = 200 milligrams = 0.2 grams. One carat is divided into one hundred copies, each called a point. 0.75 carat also known as 75 points, 0.02 carat 2 points. Similar conditions in other circumstances, with the diamond increases, the value is growing exponentially; the same weight of diamonds, because of the color, clarity, cut the value of the different and far. Second, X-ray computer tomography English name: computed tomography CT is a fully functional condition detection equipment, it is the X-ray computer tomography short. CT of the work program is this: it is based on the body's different tissues of the X ray absorption and transmittance of the different application of highly sensitive instruments to measure the human body, and then measurements for computer data entry, computer on After processing the data to
CT machine
can be taken to be checked under the parts of the body section or three-dimensional images of any part of the body found in small lesions. 1, CT since the invention of X-ray discovery, medicine began to use it to detect human disease. However, some organs of the body's absorption of the difference between X-small, so that after X-ray on the organization of overlapping lesions is difficult to find. As a result, the U.S. and British scientists started looking for something new to make up for technical inspection body with X-deficiency diseases. In 1963, American physicist Cormac found the body of different organizations have different transmission line X, in the study also obtained some of the formulas, these formulas for the subsequent application of CT has laid a theoretical foundation. In 1967, the British electronics engineer Hens Feld did not know Cormac in the case of research, also began work to develop a new technology. He first studied the pattern recognition, and then produced a X-ray sources can enhance a simple scanning device, later CT, who used to head the experimental scanning. Later, he also used such a device to measure the body, access to the same effect. September 1971, Hens Velde and co-operation with a neural radiologist in a hospital outside London to install his design and manufacture of this device, start the head check. October 4, hospital patient is examined first. Patients fully awake supine overturned the case, X-ray tube mounted above the patient, check the area around the turn, while in patients under the loaded one counter, so that all parts of the body the number of X-ray absorptiometry is reflected in the counter, and then through the electronic computer processing, the images from various parts of the body displayed on the screen. The test was very successful. April 1972, Hens Feld radiation in the UK this year announced the results of the meeting for the first time, formally proclaimed the birth of CT. This news caused great shock technology, CT successful development of self-Roentgen discovered X-ray known as after the diagnostic radiology of the most important achievements. Therefore, the Hens Feld and Cormac together for 1979 Nobel Prize in Physiology or Medicine. Now, CT has been widely used in medical diagnosis.
CT Principles
2, CT of the basic principles of CT imaging is a unit on the human body with X harness the level of a certain thickness to scan through the level by the detector receives the X line, into visible light, the by the photoelectric conversion into electrical signals, and then the analog / digital converter (analog / digital converter) to digital, entered into the computer processing. Like the image formation on selected aspects of the processing is divided into a number of the same rectangular size, called voxels (voxel), shown in Figure 1-2-1. Calculated by scanning the information obtained from each voxel X-ray attenuation coefficient or absorption coefficient, and then arranged in a matrix, that is, digital matrix (digital matrix), digital matrix can be stored on disk or CD-ROM. The digital / analog converter (digital / analog converter) to digital matrix switch for each number ranging from black to white gray small box, that is, pixel (pixel), and press the matrix arrangement, which constitutes a CT image. Therefore, CT images are reconstructed image. Each voxel X-ray absorption coefficient can be calculated by different mathematical methods. 3, CT equipment, CT equipment has the following three parts: ① scan in part by the X-ray tube, detector and scanning frame composition; ② computer system, the information collected will scan the data storage operation; ③ image display and storage system, After computer processing, the reconstructed image displayed on the TV screen or multiple cameras or camera images taken under the laser. Detector developed from the original one up to 4800 to the present. Scanning from the pan / rotation, rotation / rotation, rotation / fixed, the development of spiral CT scan recently developed (spiral CT scan). Computer capacity, fast operation can be achieved by immediate reconstruction of the image. As short scan time can be generated to avoid movement artifacts, such as respiratory motion interference can improve the image quality; level is continuous, so Buzhi Yu missed lesions, and the possible reconstruction, injection of contrast medium for angiography available CT angiography (Ct angiography, CTA). High-speed CT scan using the scanning method and the former is entirely different. Scan time can be as short as 40ms less access to multi-frame images per second. The scan time is very short, film images can be taken, to avoid artifacts caused by movement, therefore, for cardiovascular imaging, pediatric, and acute trauma patients are not well co-operation inspection. 4, CT image characteristics of CT images by a certain number of gray from black to white pixels in different arrangement constituted by matrices. These pixels reflect the corresponding X-voxel linear attenuation coefficient. CT images of different devices from different size and number of pixels. Size can be 1.0 × 1.0mm, 0.5 × 0.5mm range; number can be 256 × 256, or 65,536, or 512 × 512, that is 262,144 dollars. Obviously, the smaller the pixels, the number the more the more detailed of an image, ie spatial resolution (spatial resolution) high. The spatial resolution of CT images as X-ray images high. CT images are represented by different gray, reflecting the organs and tissues to X-extent of absorption. Therefore, X-ray images as shown in black and white images, the shadows that the low absorption area, the low-density areas, such as the number of lungs containing gas; the white, said the high absorption areas, namely high-density areas, such as bone. However, compared with CT and X-ray images, CT density of high resolution, that is, the density of high resolution (density resolutiln). Therefore, differences in human soft tissue density is small, although much closer to the water absorption coefficient, but also in contrast to the image. This is the outstanding merits of CT. Therefore, CT can better show the composition of the soft tissue organs such as brain, spinal cord, mediastinum, lung, liver, gallbladder, pancreas and pelvic organs, etc., and in a good anatomical images show lesions on the background of the image. x-ray image can reflect the density of normal and diseased tissue, such as high density and low density, but not of the concept. CT images show not only different gray level of its density, but also by tissue absorption coefficient of X ray shows the extent of high and low density, with a volume concept. Practical work, not the absorption coefficient, and converted into CT value, CT value of the note with the density. Units Hu (Hounsfield unit). Water absorption coefficient 10, CT is calculated as the 0Hu, the highest density of human cortical bone in the absorption coefficient of the highest, CT value
CT image 1
as +1000 Hu, while the lowest density of air, as-1000Hu . Body density and various organizations in different CT values of the living-1000Hu to +1000 Hu's 2000 sub-degrees. Levels of CT image is the image, commonly used cross-sectional. In order to show the whole organ, requiring multi-level continuous image. CT image through the reconstruction process on the device to use, but also coronal and sagittal reconstruction of the level of the image, you can multi-angle view of the relationship between organs and lesions. 5, CT scan examination technique points (plain CT scan), contrast-enhanced scan (contrast enhancement, CE), and imaging scans. (A) is not plain or contrast-enhanced imaging of the normal scan. Usually first make plain. (B) Intravenous contrast-enhanced scan is injected into water-soluble organic iodine, such as 60% to 76% diatrizoate 60ml and then the line scanning method. Iodine concentration in blood increased, the organs and lesions in the concentration of iodine can produce differences in the formation of the density difference, lesions may develop more clearly. Method of sub Bolus, intravenous infusion method and the sessile drop method with several. (C) of the imaging scan is the first imaging for the organ or structure, and then re-scanning method. Intracisternal injection of iodine such as music to the Oakland 8 ~ 10ml or 4 ~ 6ml line into the air cisternography re-scan, known as CT cisternography scan clearly shows that the brain pool and the small tumor. 6, CT diagnosis of the clinical application of CT diagnosis of the particular diagnostic value because it has been widely used in clinical. But CT is more expensive equipment, check the high cost of certain parts of the examination, diagnostic value, especially in diagnosis, there is a limit, it should not be regarded as routine diagnostic methods CT examination should be based on the understanding of its advantages, Application of a reasonable choice. 7, CT diagnostic features and advantages of CT examination in diagnosis of central nervous system of high-value, application common. Of intracranial tumors,
CT image 2
abscess and granuloma, parasitic disease, hematoma and traumatic brain injury, cerebral infarction and cerebral hemorrhage, and spinal cord tumor diagnosed with a herniated disc and other disease effect, diagnosis more reliable. Therefore, in addition the brain X-ray contrast angiography for diagnosis of intracranial aneurysms is still, vascular dysplasia and cerebral vascular occlusion and to understand the brain feeding arteries other than the brain, such as gas, ventriculography have been less so. Spiral CT scanning, can be obtained by fine and clear images of vascular reconstruction, the CTA, and can be three-dimensional real-time display, promising to replace conventional cerebral angiography. CT diagnosis of head and neck are also very valuable. For example, lesions of the orbit, paranasal sinus cancer early, middle ear tumor of the small bile means, listen to bone destruction and dislocation, minor damage to the inner ear bony labyrinth, ear, and congenital abnormalities such as early detection of nasopharyngeal carcinoma. But the obvious lesions, X-ray has can be diagnosed by CT examination is not necessary. The diagnosis of chest diseases, CT examination with the application of high resolution CT, increasingly shows its superiority. Using contrast-enhanced scan is usually clear whether the mass or mediastinal and hilar lymph node enlargement, with or without bronchial stenosis or obstruction, of primary and metastatic tumor, lymph node tuberculosis, the diagnosis of central lung cancer, etc., are very in to help. Interstitial lung substantive lesions can also get a better display. CT examination of the plain film shows part of the more difficult, such as concentric, overlapping the great vessels were rubbish disease, more advantages. Of the pleura, diaphragm, chest wall lesions, can also be clearly indicated. Heart and great vessels of the CT examination, especially the latter, is of great significance. Pericardial disease is mainly cardiac diagnosis. Chambers of the heart and the heart wall display. Scan time is generally longer than the cardiac cycle, affecting image clarity, diagnostic value is limited. However, calcification of the coronary arteries and heart valves, large vessels and the aneurysm wall and changes in calcification, CT examination can be well displayed. Abdominal and pelvic disease, CT, is used widely, mainly for liver,
christian louboutin pumps, gallbladder, pancreas, spleen, peritoneal cavity and retroperitoneal space and the urinary and reproductive system diseases diagnosis. Particular lesions, inflammatory and traumatic lesions and so on. Violations of the gastrointestinal lesions and adjacent to the cavity and distant metastasis, CT examination is also of great value. Of course, within the lumen of gastrointestinal lesions continued to rely mainly on the barium and endoscopy and biopsy. Bone and joint disease, most cases can be simple, economical and conventional X-ray diagnosis, the use of CT examination is relatively small. 8, CT examination range of what CT can do check it? 1) Head: cerebral hemorrhage, cerebral infarction, aneurysms, vascular malformations, a variety of tumors, trauma, bleeding, fractures, congenital malformations; 2) Chest: lung, pleural and mediastinal variety of tumors, tuberculosis, pneumonia, bronchiectasis , lung abscess, cysts, atelectasis, pneumothorax, fractures, etc.; 3) abdominal, pelvic: all real organ tumors, trauma, bleeding, liver cirrhosis, gallstones, urinary stones, water, bladder, prostate disease, some of the inflammation, deformity,
louboutin shoes, etc.; 4) spine, limbs: fractures, trauma, bone hyperplasia, disc disease, spinal stenosis, tumors, tuberculosis, etc.; 5) bone, three-dimensional reconstruction of vascular imaging; various parts of the MPR, MIP imaging ; 6) CTA (CT angiography): arteritis, arteriosclerosis obliterans, aortic aneurysm and dissection; 7) thyroid disease: thyroid adenoma, thyroid adenocarcinoma; Other: Eye and orbital tumors, trauma; paranasal sinuses inflammation, nasal polyps, tumors, cysts,
CT examination
trauma. Because of the high resolution CT will enable clear visualization of organs and structures, can be clearly demonstrated lesions. Clinically, the nervous system and the application of early diagnosis of head and neck CT, brain tumors, brain trauma, cerebral vascular accident, brain inflammation and parasitic diseases, congenital brain malformations and other brain diseases diagnosis of major substantive. Diagnosis in the facial features, for the box of tumor, sinuses, throat tumors, particularly inner ear abnormalities have diagnostic value. In the respiratory system diagnosis, the diagnosis of lung cancer, mediastinal tumors, and inspection and the internal structure of the tumor without hilar and mediastinal lymph node metastasis, so the diagnostic CT examination is made more reliable. In the heart and great vessels and the examination of the musculoskeletal system is also a diagnostic value. 9, CT of several important concepts 1) Resolution: is the resolving power of the image of the objective, he includes spatial resolution, density resolution, time resolution. 2) CT value: the practical application of the CT, we have all kinds of organizations, including air and water absorption and attenuation values are compared, and a maximum density of fixed +1000. Lower limit of the air as -1000, the other values were expressed as the middle gray, and thus a relative absorption coefficient scale. 3) The window width and window level, window level is referred to the CT image shows the center of the range. For example, commonly observed in brain tissue window level is +35 HU, and bone were observed with the +300- +600 HU. Bandwidth refers to the CT value range to display images. Such as observation of the brain with a window width of 100 to observe the bone window width of 1000. In this way, the same level of image data, by adjusting the window level and window width, you can show brain tissue were obtained for both the density and bone images. 4) The partial volume effect:: CT image of each pixel value represents the corresponding units of the average CT value of the whole organization, it can not accurately reflect the various organizations within the unit itself, the CT value. In the CT scan, where less than the thickness of the lesion, the CT values are affected by thickness of the lesion, the CT values are affected by the impact of other organizations within the slice, the CT value measured the lesions can not represent the true CT values: If smaller organizations in the high-density low-density lesions, the CT value is high; the other hand, smaller organizations in low-density high-density lesion, the CT value is low, a phenomenon known as partial volume effect. 5) Noise: a uniform object to be scanned. In a certain R0I (ROI) within the CT value of each pixel [HU] is not the same but the fluctuations around a mean value, CT value of the change is the noise. Axial (CT) image of the CT values showed some fluctuation. Other words, just as a mean CT value of the point of view, it may have upper and lower deviation, this deviation is the noise. Noise is determined by the radiation intensity. That is, to reach the detector from the X-Ray quantum number to decide. The greater the intensity, the lower the noise. Image noise depends detectors the size of the surface of the photon flux. It depends on the X-ray tube of the tube voltage, tube current,
louboutin sale, to the filter and the collimator aperture. Reconstruction algorithm also affects the noise. Therefore, people in daily life, like the feel unwell, or should go to the hospital for tests as soon as possible to confirm the diagnosis. Ensure early inspection, early detection, early diagnosis and early treatment. 10, CT and MRI of the difference between computed tomography (CT) in a cross-sectional anatomy of the plane and accurately detect the density of various small differences between organizations, is to observe bone and joint and soft tissue lesions in an ideal way of checking . In the arthritis diagnosis, mainly used to check the spine, especially the sacroiliac joints. CT is superior to conventional X-ray examination is its high resolution, but also to do with axial imaging. Because the density of high-resolution CT, so the soft tissue, bone and joint can become very clear. Can be done with axial CT scans, some of the traditional X-ray image on the joints can be more difficult to distinguish CT images to Such as the sacroiliac joint of the articular surface tilt and bend born, along with other organizations of the overlap, although the majority of cases of the sacroiliac joints have been using x-ray film may meet the requirement, but sometimes the X-ray examination found that compared sacroiliitis difficulties, then the patient in question can do CT. Magnetic resonance imaging (MRI) is based in strong magnetic field of nuclear radiation wave and the interaction of hydrogen obtained. The birth of magnetic resonance and soon become a useful diagnostic for many diseases, imaging tools, including the musculoskeletal system. Musculoskeletal magnetic resonance imaging is best suited to do, because its tissue density contrast range. In bone, joint and soft tissue lesions, the magnetic resonance imaging as has several times more than CT imaging parameters and a high degree of soft-tissue resolution, so that the contrast of soft tissue was significantly higher than CT. Magnetic resonance imaging, through its multi-planar imaging capabilities to the application of the drug high resolution surface coil can improve the image quality of the joints, so nerves, tendons, ligaments, blood vessels, cartilage and other imaging results can not be resolved fine display. Magnetic resonance imaging in bone and joint system, the inadequacy is that, for bone and soft tissue lesions no specific diagnosis, imaging is slow, in the inspection process. The activities of voluntary or involuntary patients can cause motion artifacts, affect the diagnosis. X-ray, CT, magnetic resonance imaging can be called troika, the three organically integrated, so that the current imaging not only expanded the scope of the inspection, but also improves the diagnosis. Third, the clotting time clotting time clotting time introduced (clotting time, CT) refers to the blood to leave the blood vessels, occurs in vitro coagulation time. It is different with the bleeding time, mainly within the extrinsic coagulation pathway in the determination of various coagulation factors is the lack of function is normal, or if there is an increase in anticoagulant. According to source of specimen, the clotting time measured are: blood capillary and venous blood sampling method method. Normal clotting time a) glass tube method: 5 ~ 10min; b) plastic tube: 10 ~ 19min; c) silicon tube: 15 ~ 32min. Clinical significance of coagulation time coagulation time found: a) congenital coagulation factor deficiency: If all types of hemophilia; b) acquired (acquired) clotting factor deficiency, such as severe liver disease, lack of vitamin K, etc.; c) fibrinolytic proteins dissolved vitality: as secondary, primary hyperparathyroidism and other fibrinolysis; d) circulating in the blood anticoagulant: If anti-factor or factors Ⅸ Ⅷ antibody, disseminated intravascular coagulation (DIC) heparin in the treatment of early time and so on. Reduce the clotting time seen in: a) hypercoagulable state: such as procoagulant substances into the blood and increased the activity of coagulation factors, etc.; b) thrombotic diseases: such as myocardial infarction, unstable angina, cerebrovascular disease, diabetes with vascular disease, pulmonary infarction, deep vein thrombosis, pregnancy induced hypertension and kidney syndrome. Fourth, the game cs CT famous nickname of the Police Counter-Terrorist, US Seal Team 6 counter-terrorism forces the sixth U.S. Navy SEALs Task Force - Seal Team VI formed in 1980, under the U.S. Army Command , has been among the best in the world of terrorism, and terrorists around the world continue to fight. German German GSG-9 Border Guard IX - GSG ninth team formed in 1972, under the Munich, Germany, the UK Special Air Service British Special Air Service team - from the United Kingdom, formed during World War II, responsible for the complex task of high intelligence, intelligence in the enemy's rear side for data collection and assassinations. French GIGN French national military police SWAT team - the elite anti-terrorist units in France, consisting of 100 individuals, with fast response time to deal with various terrorist activities in history has a very highly. Journey, the journey of two of the spying mission. QQ-hyun on behalf of dance in the traditional model of CT. Fifth, power system current transformer current transformer, CT that is: current transformer power system is widely used in electromagnetic current transformer (hereinafter referred to as the current transformer), it works and transformer similar. Current transformer is characterized by: (1) a coil in series in the circuit, and very few turns, therefore, the current in a coil depends entirely on the load current of the circuit under test. Nothing to do with the secondary current; (2) current transformer secondary coil connected instruments and relay current coil impedance is very small, so under normal circumstances, current transformer short-circuit condition in the near run. A current transformer, the ratio of rated secondary current, called the mutual inductance than the rated current transformer: kn = I1n/I2n as a coil rated current I1n has standardized, unified secondary coil rated current I2n 5 (1 or 0.5) security, so the rated current transformer mutual inductance than has been standardized. kn can be approximated as the transformer and secondary winding turns ratio, which kn ≈ kN = N1/N2 where N1, N2 for the first and second turns of the coil. The role of current transformer is used to measure large currents. Popular talk if you want to measure the current 400A, 400A of the meter if it is not then you should be how to do, so you should use current transformers, the large current through the transformer into a small current in the input meter, transformer turns ratio is, for example, 200 / 5 is 40 times the meter,
christian louboutin sale, that you go above a kilowatt meter, the actual 40 degrees you have used electricity transformer level lot, 15 / 5 .. 30 / 5, 50 / 5, 75 / 5,,, so ,,,,, six, building water pipeline laying Tagging install ① CT refers to the laying of cable tray wires position ② : CT refers to the cable tray laying seven instructions on Cross Stitch Fabric Cross Stitch Fabric CT is Per square inch that is contained in the grid number. Subdivided into: 8CT, 9CT, 11CT, 14CT, 18CT, 28CT, 32CT. So, what's the meaning of these specifications I 9CT embroidered cloth, for example, be explained. 9CT representative of embroidered cloth 1 inch (2.54cm) of the embroidered fabric contains 9 grid. Representatives of embroidered cloth so 11CT 1 inch (2.54cm) of embroidered cloth contains 11 representatives of lattice 14CT 1 inch embroidered cloth (2.54cm) of embroidered cloth contains 14 grid ... ... and so on, and simply, XXCT include XX represents the 1-inch grid. Cross-stitch cross-stitch embroidered fabric embroidered fabric conversion calculation method: 11ct fabric: 4.31 cell / cm 0.23cm / cell 14ct fabric: 5.49 cells / cm 0.18cm / cell 18ct fabric: 7.05 cells / cm 0.14cm / cell usually with 11 and 14CT, some of the above package is not synthesized cm, can be their own calculations. If 11CT embroidered, 150x80 grid = (150x0.23cm) x (80x0.23) = 34.5x18.4cm eight, CT Air vibration hosting service providers the new center will create more miracles CT business. CT Service Provider (CT: Cybershop Trusteeship - Shop hosted) Aircraft vibration care center to create a new business model, the CT service providers will sellers shop daily operations, management, marketing, promotion of the work entrusted to the CT service provider hosting , CT shop service provider with extensive experience in shop, as sellers shop around the clock operation, effectively improve the shop's turnover, fast, professional, safe shop to enhance the core competitive advantage. This is a comprehensive service network operators! Advanced service concept. Is a leading IT services industry, the concept of the most service system. ct command to use dial-up connection terminal and perform the login process. Syntax ct [-h] [-sSpeed] [-v] [-wNumber] [-xNumber] TelephoneNumber ... ct command is a basic description of the Network Utility (BNU) command to start the remote terminal (eg 3161) and users connected through the telephone line modem at each end to communicate with the workstation. Remote terminal user can log on the workstation and in their work. Ct local system user to issue commands and the corresponding phone number to call modem to connect to the remote terminal. When the connection is established, ct command to issue a login prompt, displayed in the remote terminal. Remote terminal at the prompt, enter the user login name and open a new shell. Remote terminal users to the same as the local user to work on the workstation. ct command is useful under the following conditions: * off-site users need to work under strict supervision to communicate with the local system and local user workstations do not want to expose the phone number. Because the local system to connect to the remote terminal, remote system users do not need to know the phone number of the local system. Moreover, the local user to issue commands to monitor remote users ct work. * The connection shall be borne by the local site or call the designated account to pay for the workstation. If the remote user has the appropriate access permissions, and exhale through the connection of the modem operation, the user can receive the same amount of call. Call the specified remote user's local system, log on and issue ct command, using the remote terminal's phone number, but no-h flag. Hang up the initial link to the local system to a remote terminal from the release into the call, then the callback modem to connect to the remote terminal if no free line,
christian louboutin shoes, ct command to display a result of the message, and ask whether you want to wait for a local user. If the response is no, ct command will hang up. If the local user to wait for an idle line, ct command prompt wait a few minutes. ct command to dial a remote system every minute, until the connection is established or until it reaches the specified time. Ct to establish a connection, remote users connect via a regular telephone call local users and local user sent a request ct command. However, if such a connection often occurs in your site, the system administrator to set the best use of the following methods BNU, which specify the local system at a specified time for one or more of the specified terminal automatically issue of ct order. Note: 1. Ct command before running to ensure that the remote terminal and can respond to the phone modem is connected. 2. If the user does not execute the command ct root privileges, the connection of the port must be shared or delay the port. Otherwise, the remote login will fail. And delays to get the port about sharing more information, see pshare and pdelay command. And,
cheap christian louboutin, to ct commands in a shared or delay the successful implementation of the port, the user must call this command is a UNIX-to-UNIX Copy Program (uucp) user group. The ct command is not as flexible and BNU cu command. Example, when connecting to the remote system is achieved through the ct command, the user can execute commands on the local system. However, ct command has two cu command does not have the features: * user can instruct the ct command to continue to dial the specified phone number until a connection is established or exceed the set time. * The user can specify more than one phone number, to indicate the ct command to continue dialing each modem, one of the lines until a connection is established. If the local user at the command line enter multiple phone numbers specified in the alternate dial-up path, ct command to try each line, they list in the BNU Devices file (default is / etc / uucp / Devices file) until it finds a suitable properties available for all out of line or port. If there is no free line, ct will be asked if you wait for the command, if you want to wait, ask to wait. The ct command to continue to try to open every minute intervals until the dialer more than the specified time. Local user input commands through the use of-wNumber flag to specify a number of times you can override this prompt. When the user logs off, ct command prompts the user of a remote terminal to re-connection options; system can display a new login prompt, you can disconnect. Flag-h to prevent the ct command hang up the current response to the next line to enter the call away. -SSpeed specified data transfer rate. The default is 1200 baud. Ct-v command allows to send a running narrative to the standard error output. -WNumber specifies the maximum waiting time for the ct command line. This command will dial the remote modem for a minute intervals until the connection is established or until beyond the specified time. -XNumber start debugging on the local system displays the standard error output on the local details of the orders. Number variable specifies the debug level, and is from 0 to 9 in the singular. The recommended debugging level is 9. TelephoneNumber specify a modem to connect to the remote terminal phone number. TelephoneNumber variable contains a number from 0 to 9, - (minus) on behalf of delay, = (equal sign) on behalf of secondary dial tone, * (asterisk) and # (pound mark). This phone number can contain 31 characters maximum. Example 1. To make use of internal telephone number and connected to the modem and the remote terminal, enter: ct 41589 phone number 4-1589 is within the dial. - (Hyphen) is optional. System Response: Allocated dialer at 1200 baud Confirm hang_up? (Y to hang_up) 2. To make a local phone number and connected to the modem and remote, enter: ct-w3 9 = 5553017 ct command to dial a local phone number 555-3017, which dialed 9 is required to reach the external dial tone. Three minutes of waiting is waiting for the specified command line ct maximum time (in minutes). 3. To make use of long-distance telephone number and connected to the modem and remote, enter: ct-w5 9 = 12345557003 This command dial long-distance telephone number 1-234-555-7003, 9 of which are required to reach the external dial tone. Three-minute wait is to wait for the specified command line ct maximum time (in minutes). File / usr / bin / ct ct contains the command. / Etc / uucp / Devices list of the available device information. / Etc / uucp / Dialcodes include dialing code abbreviations. / Etc / uucp / Dialers defined modem dialer. / Etc / uucp / Systems list can access the remote system. / Etc / uucp / Sysfiles alternate file specified as Systems, Devices and Dialers files. Other abbreviations 1, Resolution: is the resolving power of the image of the objective, he includes spatial resolution, density resolution, time resolution. 2, CT values: the practical application of the CT, we have a variety of organizations, including Chiang absorption and attenuation value of air compared with water, and a maximum density of fixed +1000. Lower limit of the air as -1000, the other values were expressed as the middle gray, and thus a relative absorption coefficient scale. 3, window width and window level 4, 5 partial volume effect, noise, 6, Cycle Time, cycle, has been widely used in the manufacturing sector, generally refers to products and production lines from the beginning to the period of time between the finished products to d (Day, days) for the unit. 7, CT, Channing Tatum (Channing Tatum) 8, the role of Naruto to Hinata stands at 9, anti-matter 10, Detective Conan in Chianti (Chianti) initials game CT: CT: counter-terrorist The acronym for Counter-Strike, the police and so on. There are critical hits, which hit the vital meaning. 11, said pile cap construction. 12. Abbreviation Connecticut (Connecticut - CT) New England Northeastern United States one of six states, is the most southerly region of New England a state 13.CT (Communication Technology abbreviation): Communication Technology 14. Cao Teng abbreviation 15. also the nickname entry for more Atlas Atlas References 1
measurement symbols carat gem
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Further reading: 1
gem measurement symbol CT
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2
ICT information technology and communication technology
http://baike.baidu.com/view/470877.htm
Open Category: precious stones, the Nobel Prize, medical equipment, communications technology, UNIX command Dictionary): CTabbr.1. = Central Time Central Standard Time 2. = Connecticut Connecticut zip code
ctabbr.1. = cellular therapy Medical】 【cell therapy 2. = corrective therapy Medical】 【correction therapy to improve my
Office 2007 Standard Hyperbrain Owner's Manual - 4
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