【免费下载】BIT医学图像答案124

医学图像答案

1. Image terminology explanation （医学图像术语解释）

(1) image smoothing （图像平滑）

Image smoothing is used to highlight the image of wide area, the low frequency component, trunk or suppress image noise and interference of high frequency components, make the image brightness flat gradient, gradient decrease mutations, improve the image quality of the image processing methods.Image smoothing methods include: interpolation method, linear smoothing method, convolution method and so on.

(2) image sharpening （图像锐化）

Image sharpening is to compensate the image contour, enhancing image edge and gray level jump, images by an average or integral operation, thus on the inverse operation, make the image clear.Image sharpening method includes: gradient method and Laplace algorithm, Robert algorithm and so on.

(3) low-pass filter （低通滤波器）

A low-pass filter is a filter that passes signals with a frequency lower than a certain cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency. The amount of attenuation for each frequency depends on the filter design.

(4) high-pass filter （高通滤波器）

A high-pass filter is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with frequencies lower than the cutoff frequency. The amount of attenuation for each frequency depends on the filter design. A high-pass filter is usually modeled as a linear time-invariant system. It is sometimes called a low-cut filter or bass-cut filter.High-pass filters have many uses, such as blocking DC from circuitry sensitive to non-zero average voltages or radio frequency devices.

(5) image restoration （图像复原）

Image restoration is the operation of taking a corrupted/noisy image and estimating the clean original image. Corruption may come in many forms such as motion blur, noise, and camera misfocus.

Image restoration is different from image enhancement in that the latter is designed to emphasize features of the image that make the image more pleasing to the observer, but not necessarily to produce realistic data from a scientific point of view.

(6) image segmentation （图像分割）

image segmentation is the process of partitioning a digital image into multiple segments (sets of pixels, also known as superpixels). The goal of segmentation is to simplify and/or change the representation of an image into something that is more meaningful and easier to analyze. Image segmentation is typically used to locate objects and boundaries (lines, curves, etc.) in images. More precisely, image segmentation is the process of assigning a label to every pixel in an image such that pixels with the same label share certain characteristics.

The result of image segmentation is a set of segments that collectively cover the entire image, or a set of contours extracted from the image (see edge detection). Each 、管路敷设技术通过管线敷设技术不仅可以解决吊顶层配置不规范高中资料试卷问题，而且可保障各类管路习题到位。在管路敷设过程中，要加强看护关于管路高中资料试卷连接管口处理高中资料试卷弯扁度固定盒位置保护层防腐跨接地线弯曲半径标高等，要求技术交底。管线敷设技术中包含线槽、管架等多项方式，为解决高中语文电气课件中管壁薄、接口不严等问题，合理利用管线敷设技术。线缆敷设原则：在分线盒处，当不同电压回路交叉时，应采用金属隔板进行隔开处理；同一线槽内，强电回路须同时切断习题电源，线缆敷设完毕，要进行检查和检测处理。、电气课件中调试对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料试卷相互作用与相互关系，根据生产工艺高中资料试卷要求，对电气设备进行空载与带负荷下高中资料试卷调控试验；对设备进行调整使其在正常工况下与过度工作下都可以正常工作；对于继电保护进行整核对定值，审核与校对图纸，编写复杂设备与装置高中资料试卷调试方案，编写重要设备高中资料试卷试验方案以及系统启动方案；对整套启动过程中高中资料试卷电气设备进行调试工作并且进行过关运行高中资料试卷技术指导。对于调试过程中高中资料试卷技术问题，作为调试人员，需要在事前掌握图纸资料、设备制造厂家出具高中资料试卷试验报告与相关技术资料，并且了解现场设备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。

、电气设备调试高中资料试卷技术电力保护装置调试技术，电力保护高中资料试卷配置技术是指机组在进行继电保护高中资料试卷总体配置时，需要在最大限度内来确保机组高中资料试卷安全，并且尽可能地缩小故障高中资料试卷破坏范围，或者对某些异常高中资料试卷工况进行自动处理，尤其要避免错误高中资料试卷保护装置动作，并且拒绝动作，来避免不必要高中资料试卷突然停机。因此，电力高中资料试卷保护装置调试技术，要求电力保护装置做到准确灵活。对于差动保护装置高中资料试卷调试技术是指发电机一变压器组在发生内部故障时，需要进行外部电源高中资料试卷切除从而采用高中资料试卷主要保护装置。

of the pixels in a region are similar with respect to some characteristic or computed property, such as color, intensity, or texture. Adjacent regions are significantly different with respect to the same characteristic(s).When applied to a stack of images, typical in medical imaging, the resulting contours after image segmentation can be used to create 3D reconstructions with the help of interpolation algorithms like Marching cubes.

(7) image registration （图像配准）Image registration is to different time, different sensors (imaging equipment) or under different conditions (weather, illumination, camera position and Angle, etc.) to obtain two or more image matching, superposition, the process of image registration is to point to in a medical image to seek a space (or a series of transformation, to make it with another medical image is the same on the corresponding points to the space.2. Write down the 2D Discrete Fourier transform, and discuss the relationship between the frequency components of the Fourier transform and spatial features of an image.（写出二维离散傅里叶变换，并讨论图像的傅里叶变换的频率分量与空间特性之间的关系）The 2D DFT F(u,v) can be obtained by:(1) taking the 1D DFT of every row of image f(x,y), F(u,y), (2)taking the 1D DFT of every column of F(u,y). Frequency is directly related to rate of change. The frequency of fast varying components in an image is higher than slowly varying components.The high frequency part reflects the details information(variance of gray level) of image, The low frequency part reflects the general gray-level appearance.

3. What is image histogram? Which areas of histogram can be used in? What is the basic concept of histogram equalization?（什么是图像（灰度）直方图？有哪些用途？直方均衡的基本思想是什么？）

Image histogram ：Gray histogram is a function of grayscale, describes the number of each pixel gray levels in the image, reflect the frequencies of each gray level images.Here is a grayscale, ordinate is frequency of gray levels.

Purpose : evaluation of imaging conditions, image enhancement, image segmentation, image compression, extends the conditional histogram, the joint histogram etc.

The basic concept of histogram equalization ：the basic idea of histogram equalization of the basic idea is to put the original figure is evenly distributed in the form of a histogram transformation, thus increasing the dynamic range of pixel gray value which can achieve the result that to enhance the overall image contrast.

4. What is image enhancement in the frequency (spatial) domain? List the some of the main methods of frequency (spatial) enhancement.（什么是频率域的图像增强，什么是空间域的图像增强？列出两者各有哪些主要方法）

Image enhancement ：According to the specific need to highlight certain parts of the image information, at the same time, to weaken or remove some unwanted 、管路敷设技术通过管线敷设技术不仅可以解决吊顶层配置不规范高中资料试卷问题，而且可保障各类管路习题到位。在管路敷设过程中，要加强看护关于管路高中资料试卷连接管口处理高中资料试卷弯扁度固定盒位置保护层防腐跨接地线弯曲半径标高等，要求技术交底。管线敷设技术中包含线槽、管架等多项方式，为解决高中语文电气课件中管壁薄、接口不严等问题，合理利用管线敷设技术。线缆敷设原则：在分线盒处，当不同电压回路交叉时，应采用金属隔板进行隔开处理；同一线槽内，强电回路须同时切断习题电源，线缆敷设完毕，要进行检查和检测处理。、电气课件中调试对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料试卷相互作用与相互关系，根据生产工艺高中资料试卷要求，对电气设备进行空载与带负荷下高中资料试卷调控试验；对设备进行调整使其在正常工况下与过度工作下都可以正常工作；对于继电保护进行整核对定值，审核与校对图纸，编写复杂设备与装置高中资料试卷调试方案，编写重要设备高中资料试卷试验方案以及系统启动方案；对整套启动过程中高中资料试卷电气设备进行调试工作并且进行过关运行高中资料试卷技术指导。对于调试过程中高中资料试卷技术问题，作为调试人员，需要在事前掌握图纸资料、设备制造厂家出具高中资料试卷试验报告与相关技术资料，并且了解现场设备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。、电气设备调试高中资料试卷技术电力保护装置调试技术，电力保护高中资料试卷配置技术是指机组在进行继电保护高中资料试卷总体配置时，需要在最大限度内来确保机组高中资料试卷安全，并且尽可能地缩小故障高中资料试卷破坏范围，或者对某些异常高中资料试卷工况进行自动处理，尤其要避免错误高中资料试卷保护装置动作，并且拒绝动作，来避免不必要高中资料试卷突然停机。因此，电力高中资料试卷保护装置调试技术，要求电力保护装置做到准确灵活。对于差动保护装置高中资料试卷调试技术是指发电机一变压器组在发生内部故障时，需要进行外部电源高中资料试卷切除从而采用高中资料试卷主要保护装置。

information processing method.Image enhancement methods: image enhancement in the spatial domain and frequency domain image enhancement.image enhancement in the frequency domain ：The image as a two-dimensional signal, carries on the two-dimensional Fourier transform, the image of a frequency domain transform coefficient for processing, then enhanced images were obtained through the inverse transformation.Frequency domain image smoothing and fuzzy mainly through the low-pass filter of high frequency attenuation.While sharpening image mainly by high frequency filter filter out low frequency.Main methods : high-pass filter, low-pass filter and homomorphic filtering enhancement method;image enhancement in the spatial domain ：Spatial domain method:In space domain of image point operations, it can allow users to change the grey value of pixels in the image, so through some processing will create a new image.Main methods : average filtering method, the median filtering method, gradient method, mask matching method, the statistical difference method.

5. Write the mathematical model of image restoration, explain the main cause of image degeneration, and list some main image restoration methods.（写出图像复原的数学模型，解释图像降质的主要原因，并列出图像复原的主要方法）

mathematical model ：For an input image f (x, y) for processing, to produce a picture of a degraded image g (x, y).A given g (x, y) and some knowledge about the degradation function H as well as some knowledge of additive noise item, a recovery filter is designed, the purpose of image restoration is for an estimate of the original image .),(y x f

the main cause of image degeneration ：

Image degradation mainly comes from image Retrieval and transmission process:

Retrieval process: as the optical imaging system aberration, diffraction, nonlinear distortion, defocusing, nonlinear, imaging process of photosensitive components of relative motion, atmospheric turbulence effect, environmental factors of random noise, 、管路敷设技术通过管线敷设技术不仅可以解决吊顶层配置不规范高中资料试卷问题，而且可保障各类管路习题到位。在管路敷设过程中，要加强看护关于管路高中资料试卷连接管口处理高中资料试卷弯扁度固定盒位置保护层防腐跨接地线弯曲半径标高等，要求技术交底。管线敷设技术中包含线槽、管架等多项方式，为解决高中语文电气课件中管壁薄、接口不严等问题，合理利用管线敷设技术。线缆敷设原则：在分线盒处，当不同电压回路交叉时，应采用金属隔板进行隔开处理；同一线槽内，强电回路须同时切断习题电源，线缆敷设完毕，要进行检查和检测处理。、电气课件中调试对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料试卷相互作用与相互关系，根据生产工艺高中资料试卷要求，对电气设备进行空载与带负荷下高中资料试卷调控试验；对设备进行调整使其在正常工况下与过度工作下都可以正常工作；对于继电保护进行整核对定值，审核与校对图纸，编写复杂设备与装置高中资料试卷调试方案，编写重要设备高中资料试卷试验方案以及系统启动方案；对整套启动过程中高中资料试卷电气设备进行调试工作并且进行过关运行高中资料试卷技术指导。对于调试过程中高中资料试卷技术问题，作为调试人员，需要在事前掌握图纸资料、设备制造厂家出具高中资料试卷试验报告与相关技术资料，并且了解现场设备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。、电气设备调试高中资料试卷技术电力保护装置调试技术，电力保护高中资料试卷配置技术是指机组在进行继电保护高中资料试卷总体配置时，需要在最大限度内来确保机组高中资料试卷安全，并且尽可能地缩小故障高中资料试卷破坏范围，或者对某些异常高中资料试卷工况进行自动处理，尤其要避免错误高中资料试卷保护装置动作，并且拒绝动作，来避免不必要高中资料试卷突然停机。因此，电力高中资料试卷保护装置调试技术，要求电力保护装置做到准确灵活。对于差动保护装置高中资料试卷调试技术是指发电机一变压器组在发生内部故障时，需要进行外部电源高中资料试卷切除从而采用高中资料试卷主要保护装置。

Molecular Imaging

Molecular imaging provides detailed information of the biological processes taking place in the body at cellular and molecular levels and can indicate disease in its earliest stages.

Other Types of Medical Imaging

Some types of medical imaging work without using ionizing radiation, for example magnetic resonance imaging (MRI) and ultrasound imaging, and have specific uses in the diagnosis of disease.

7. The physics, characteristics, advantage and disadvantage, and clinical applications of X-ray, MR, NMI, US.（基本原理、特点、优势、不足、临床应用） （1）X-ray(X 射线)The physics: When a roughly uniform beam intensity X-ray exposure to human body, one part of X-ray absorption and scattering, the other part along the direction of the original transmission through the human body. Due to the human body all kinds of tissue and organ differences in density, thickness and so on , the absorption amount of projection on the X ray of each are not identical , so that the human body through X-ray intensity distribution change and carry human body information, and forming X-ray image information eventually. Namely for X ray imaging body.Characteristics ：X-ray image information cannot identify for the human eye, it must pass a certain collection, conversion, display system of X-ray intensity distribution is converted into visible light intensity distribution, formation of X ray image visible to the human eye.Advantage ：It has high resolution, which can clear the organ and structure development, and can clearly show the lesions;

Disadvantage ：

(1) High-energy gamma ray source can cause irreversible damage to the human body tissue and the environment, even the medical X-ray CT, the accumulation of multiple use, X ray will have influence on patient is according to the organization.

(2) Due to X-ray computed tomography (ct) imaging rather rely on intravenous contrast agent to development, so there is a potential danger, which may make some patients of renal injury.

Clinical applications ：

1、Diagnosis: according to different human groups of X-ray absorption and transmittance, using high sensitivity of the instrument to measure to the human body, so that it can be taken under the body section of the inspected or stereo image, and find small lesions in any parts of the body.

2、Treatment: X-rays through the body's tissues could produce ionization effect, Compton scattering, and generates electron pair, which may induce a series of biological effects.Research shows that X-ray has damage to the biological tissues, especially for the separatist activities or is the division of the cell, its damage ability is stronger.、管路敷设技术通过管线敷设技术不仅可以解决吊顶层配置不规范高中资料试卷问题，而且可保障各类管路习题到位。在管路敷设过程中，要加强看护关于管路高中资料试卷连接管口处理高中资料试卷弯扁度固定盒位置保护层防腐跨接地线弯曲半径标高等，要求技术交底。管线敷设技术中包含线槽、管架等多项方式，为解决高中语文电气课件中管壁薄、接口不严等问题，合理利用管线敷设技术。线缆敷设原则：在分线盒处，当不同电压回路交叉时，应采用金属隔板进行隔开处理；同一线槽内，强电回路须同时切断习题电源，线缆敷设完毕，要进行检查和检测处理。、电气课件中调试对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料试卷相互作用与相互关系，根据生产工艺高中资料试卷要求，对电气设备进行空载与带负荷下高中资料试卷调控试验；对设备进行调整使其在正常工况下与过度工作下都可以正常工作；对于继电保护进行整核对定值，审核与校对图纸，编写复杂设备与装置高中资料试卷调试方案，编写重要设备高中资料试卷试验方案以及系统启动方案；对整套启动过程中高中资料试卷电气设备进行调试工作并且进行过关运行高中资料试卷技术指导。对于调试过程中高中资料试卷技术问题，作为调试人员，需要在事前掌握图纸资料、设备制造厂家出具高中资料试卷试验报告与相关技术资料，并且了解现场设备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。、电气设备调试高中资料试卷技术电力保护装置调试技术，电力保护高中资料试卷配置技术是指机组在进行继电保护高中资料试卷总体配置时，需要在最大限度内来确保机组高中资料试卷安全，并且尽可能地缩小故障高中资料试卷破坏范围，或者对某些异常高中资料试卷工况进行自动处理，尤其要避免错误高中资料试卷保护装置动作，并且拒绝动作，来避免不必要高中资料试卷突然停机。因此，电力高中资料试卷保护装置调试技术，要求电力保护装置做到准确灵活。对于差动保护装置高中资料试卷调试技术是指发电机一变压器组在发生内部故障时，需要进行外部电源高中资料试卷切除从而采用高中资料试卷主要保护装置。

（2）MR （Magnetic Resonance 磁共振）

The physics ：MR is the use of nuclear magnetic resonance (NMR) principle, through extra gradient magnetic field to detect the electromagnetic waves which is emitted by objects, and use it to drow into objects within the structure of the image.The imaging of the medical is the use of hydrogen nuclei in the body's tissues (protons) in magnetic field by rf pulse excitation and nuclear magnetic resonance phenomenon, produce magnetic resonance (NMR) signal, through computer processing, gives a certain level of human body image reconstruction imaging techniques.

Characteristics ：

1、Multi-parameter imaging, it can provide abundant diagnostic information;

2、High contrast imaging, it can she come to the anatomy atlas;

3、Implementation from the three dimensional space observation of human body;

4、Human energy metabolism,it may directly observe the biological blueprint of cell activity;

5、Do not use contrast medium, it can observe the heart and blood vessels structure;

6、No ionizing radiation, it can be involved in magnetic resonance imaging (MRI) treatment;

7、Without the disturbance of gas and bone artifacts;Advantage ：(1) without radioactive damage to human body’s organization, also do not have the biological damage;(2) soft tissue density resolution is higher than that of CT, the spatial resolution can be equivalent to that of CT.(3) It can directly do the transverse, sagittal and coronal layer and a variety of cant image;(4) More imaging parameters and methods, and more diagnostic information than CT;(5) With the help of the proton flow effect, it can clearly show that blood vessels;Disadvantage ：(1) Calcification and bone disease cannot display oven;(2) Scan for a long time, daily can check the number of relatively less CT;(3) On abdominal MRI remains motion artifact interference;(4) In the body of magnetic metals cannot check;(5) It is too expensive.Clinical applications ：

Magnetic resonance imaging (MRI) has been used throughout the system of imaging diagnosis.Effect is the best brain, and spinal cord, heart, great vessels, joint and pelvic bone, soft tissue.For cardiovascular disease can not only observe the chamber, great vessels and valvular anatomy changes, and can make ventricular analysis, qualitative and semi-quantitative diagnosis, can make multiple sectional drawing, high spatial resolution, a heart and lesions, and its relationship with surrounding structures.In diagnosis of cerebrospinal lesions, can make coronal, sagittal and transverse section.

（3）NMI （Nuclear Medical Imaging 核医学成像）

、管路敷设技术通过管线敷设技术不仅可以解决吊顶层配置不规范高中资料试卷问题，而且可保障各类管路习题到位。在管路敷设过程中，要加强看护关于管路高中资料试卷连接管口处理高中资料试卷弯扁度固定盒位置保护层防腐跨接地线弯曲半径标高等，要求技术交底。管线敷设技术中包含线槽、管架等多项方式，为解决高中语文电气课件中管壁薄、接口不严等问题，合理利用管线敷设技术。线缆敷设原则：在分线盒处，当不同电压回路交叉时，应采用金属隔板进行隔开处理；同一线槽内，强电回路须同时切断习题电源，线缆敷设完毕，要进行检查和检测处理。、电气课件中调试对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料试卷相互作用与相互关系，根据生产工艺高中资料试卷要求，对电气设备进行空载与带负荷下高中资料试卷调控试验；对设备进行调整使其在正常工况下与过度工作下都可以正常工作；对于继电保护进行整核对定值，审核与校对图纸，编写复杂设备与装置高中资料试卷调试方案，编写重要设备高中资料试卷试验方案以及系统启动方案；对整套启动过程中高中资料试卷电气设备进行调试工作并且进行过关运行高中资料试卷技术指导。对于调试过程中高中资料试卷技术问题，作为调试人员，需要在事前掌握图纸资料、设备制造厂家出具高中资料试卷试验报告与相关技术资料，并且了解现场设备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。、电气设备调试高中资料试卷技术电力保护装置调试技术，电力保护高中资料试卷配置技术是指机组在进行继电保护高中资料试卷总体配置时，需要在最大限度内来确保机组高中资料试卷安全，并且尽可能地缩小故障高中资料试卷破坏范围，或者对某些异常高中资料试卷工况进行自动处理，尤其要避免错误高中资料试卷保护装置动作，并且拒绝动作，来避免不必要高中资料试卷突然停机。因此，电力高中资料试卷保护装置调试技术，要求电力保护装置做到准确灵活。对于差动保护装置高中资料试卷调试技术是指发电机一变压器组在发生内部故障时，需要进行外部电源高中资料试卷切除从而采用高中资料试卷主要保护装置。

The physics ：Introducing a radioactive isotope labeling on the drugs and into the body, when it is absorbed by the body's organs and organizations, formed the radiation source in the body.From the body in vitro were tested by nuclear detection device can rays emitted by isotope in the process of decay, radioactive isotope distribution density of the image in the body.Due to radioactive drugs remain relatively stable nuclide or marked the chemical properties and biological behavior of drugs, normally involved in the metabolism of the body, so the radioisotope images not only reflect the viscera and organization form, more important is to provide the related viscera function and related physiological, biochemical information.Characteristics ：It can provide both morphological and functional of the organ or tissue.Advantage ：(1) High specificity;(2) The whole body imaging;(3) Good safety;Disadvantage ：It is the main problem is the price of the equipment is too high, and need to form a complete set of cyclotron to generate the required super short half-life positron tracer, which means the hospital must be equipped with cyclotron.Clinical applications ：Use PET imaging, it should be injected in the patient of radioactive drugs, radioactive drugs release signals in a patient, and received by in vitro of the PET scanner, then to form images, it can appear organ or tissue chemical change, the degree of the metabolism of a portion of the pointed out that different from the norm.

（4）US （UltraSound 超声成像）

The physics:

Various organs and organizations has its specific acoustic impedance and attenuation characteristics, and therefore constitute the difference on the acoustic impedance and attenuation differences.When the ultrasonic into the body, from surface to the deep, will go through with different acoustic impedance and attenuation characteristics of different organs and tissues, resulting in a different reflection and attenuation.The different reflection and attenuation is the basis of the composition of ultrasonic https://www.sodocs.net/doc/719420930.html,bining with the received echo, according to the echo intensity, with different shades of light show on the screen, in turn, it can show section ultrasound images of the human body, called the ultrasonographic (sonogram or echogram).Characteristics ：

Ultrasonic imaging is an ultrasonic acoustic properties can obtain the internal structure of human organs, ultrasonic imaging technology will these information into image viewable to the human eye, so as to checking methods for the diagnosis of disease.

Advantage ：

(1) Good real-time;、管路敷设技术通过管线敷设技术不仅可以解决吊顶层配置不规范高中资料试卷问题，而且可保障各类管路习题到位。在管路敷设过程中，要加强看护关于管路高中资料试卷连接管口处理高中资料试卷弯扁度固定盒位置保护层防腐跨接地线弯曲半径标高等，要求技术交底。管线敷设技术中包含线槽、管架等多项方式，为解决高中语文电气课件中管壁薄、接口不严等问题，合理利用管线敷设技术。线缆敷设原则：在分线盒处，当不同电压回路交叉时，应采用金属隔板进行隔开处理；同一线槽内，强电回路须同时切断习题电源，线缆敷设完毕，要进行检查和检测处理。、电气课件中调试对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料试卷相互作用与相互关系，根据生产工艺高中资料试卷要求，对电气设备进行空载与带负荷下高中资料试卷调控试验；对设备进行调整使其在正常工况下与过度工作下都可以正常工作；对于继电保护进行整核对定值，审核与校对图纸，编写复杂设备与装置高中资料试卷调试方案，编写重要设备高中资料试卷试验方案以及系统启动方案；对整套启动过程中高中资料试卷电气设备进行调试工作并且进行过关运行高中资料试卷技术指导。对于调试过程中高中资料试卷技术问题，作为调试人员，需要在事前掌握图纸资料、设备制造厂家出具高中资料试卷试验报告与相关技术资料，并且了解现场设备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。、电气设备调试高中资料试卷技术电力保护装置调试技术，电力保护高中资料试卷配置技术是指机组在进行继电保护高中资料试卷总体配置时，需要在最大限度内来确保机组高中资料试卷安全，并且尽可能地缩小故障高中资料试卷破坏范围，或者对某些异常高中资料试卷工况进行自动处理，尤其要避免错误高中资料试卷保护装置动作，并且拒绝动作，来避免不必要高中资料试卷突然停机。因此，电力高中资料试卷保护装置调试技术，要求电力保护装置做到准确灵活。对于差动保护装置高中资料试卷调试技术是指发电机一变压器组在发生内部故障时，需要进行外部电源高中资料试卷切除从而采用高中资料试卷主要保护装置。

(2) No damage;

(3) There is no pain;

(4) Low cost;

Disadvantage ：

The contrast of the image resolution and space resolution is lower than CT and MRI.Clinical applications ：

Ultrasonic diagnosis foundation focuses on the detailed observation and analysis.Capture a variety of features, comprehensive analysis of the cause, the various changes in physiological condition, and combined with other forms of diagnosis.

、管路敷设技术通过管线敷设技术不仅可以解决吊顶层配置不规范高中资料试卷问题，而且可保障各类管路习题到位。在管路敷设过程中，要加强看护关于管路高中资料试卷连接管口处理高中资料试卷弯扁度固定盒位置保护层防腐跨接地线弯曲半径标高等，要求技术交底。管线敷设技术中包含线槽、管架等多项方式，为解决高中语文电气课件中管壁薄、接口不严等问题，合理利用管线敷设技术。线缆敷设原则：在分线盒处，当不同电压回路交叉时，应采用金属隔板进行隔开处理；同一线槽内，强电回路须同时切断习题电源，线缆敷设完毕，要进行检查和检测处理。、电气课件中调试对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料试卷相互作用与相互关系，根据生产工艺高中资料试卷要求，对电气设备进行空载与带负荷下高中资料试卷调控试验；对设备进行调整使其在正常工况下与过度工作下都可以正常工作；对于继电保护进行整核对定值，审核与校对图纸，编写复杂设备与装置高中资料试卷调试方案，编写重要设备高中资料试卷试验方案以及系统启动方案；对整套启动过程中高中资料试卷电气设备进行调试工作并且进行过关运行高中资料试卷技术指导。对于调试过程中高中资料试卷技术问题，作为调试人员，需要在事前掌握图纸资料、设备制造厂家出具高中资料试卷试验报告与相关技术资料，并且了解现场设备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。、电气设备调试高中资料试卷技术电力保护装置调试技术，电力保护高中资料试卷配置技术是指机组在进行继电保护高中资料试卷总体配置时，需要在最大限度内来确保机组高中资料试卷安全，并且尽可能地缩小故障高中资料试卷破坏范围，或者对某些异常高中资料试卷工况进行自动处理，尤其要避免错误高中资料试卷保护装置动作，并且拒绝动作，来避免不必要高中资料试卷突然停机。因此，电力高中资料试卷保护装置调试技术，要求电力保护装置做到准确灵活。对于差动保护装置高中资料试卷调试技术是指发电机一变压器组在发生内部故障时，需要进行外部电源高中资料试卷切除从而采用高中资料试卷主要保护装置。