闭管

Thin-walled tube with closed section is commonly used in large space structures. In order to calculate the time-dependent temperature fields in these structures subjected to heat flux and emitting thermal energy by radiation, the temperature gradients along both the axes and circumferences of the tubes should be considered.

薄壁闭口管是大型空间结构中的常用元件，为准确地计算以其为组件的空间结构在太空辐射换热条件下的瞬态温度场，必须同时考虑沿管轴向与横截面周向两个方向的温度梯度。

Methods autohemic blood from femoral artery of dogs was taken and injected to one side pleural cavity with the same volume of normal saline and air to establish a model of hemopneurothorax on dogs .then 24 the dogs were divided into experimental group and control group at random with 12 dogs in each group. to observe and analyze the time of chest tube insertion,the intensity of resistance to pulling and drainage effect between the thoracentesis technique of invented minute invasion closed-chest drainage and traditional closed-chest drainage.

利用家犬自体股动脉穿刺采血注入一侧胸腔、同时注入等量盐水及空气的方法建立家犬血气胸模型，并将其随机分成实验组（n=12）和对照组（n=12），观察分析自制微创胸腔闭式引流装置与传统胸腔闭式引流装置的置管时间、抗拉强度、引流效果等。

According to capability of the circuit of DC motor, build the model of DC motor; designed the speed-current double closed loop system based on the model of DC motor; analyzed the method to solve the problem of discontinuousness of current.

二、根据直流电机回路，建立电动机的数学模型；针对该电动机模型，选用速度——电流双闭环控制系统，建立双闭环系统的控制方框图；分析晶闸管相控整流方式中出现电流断续现象的解决方法。

Personally,i believe i am just the person who can best fill this position.to begin with,my major , my degree exactly meet the basic requirements of the advertised position.second,i have 6 years of experience rotating in surgical departments.as having pererrorerrorerrorformed 2000 or so procedures,i am able to deal with most basic clinical problems in most surgical departments,and i am good at all kinds of basic surgical skills and procedures,including tracheotomy,endotracheal intubation,thyrocricocentesis,central vein catheterization,external lateral ventricular drainage,closed drainage of thoracic cavity,peritoneocentesis,suprapubis vesicopun c ture,gastrointestinal decompression,urethral catheterization,cranial traction,bone marrow pun c ture,plaster immobilization, routine fracture fixation and traction, phlebotomy , excellent debridement and suturing, and so on.conclusively,i am competent in most basic surgical work and good at organising residents on first aid work.

我自信我正是贵公司所需要的雇员。首先，我的学历，学位和工作经验正符合贵公司在网站中告知的该职位的应聘条件。其次，我有 6 年的外科各科室轮转的工作经历。毕业至今我已经参与完成大小手术 2000 台次，鉴于此，我能处理各外科科室的基本临床问题，熟练进行外科各科室的基本临床操作和手术，比如气管切开术，气管内插管术，环甲膜穿刺术，中心静脉置管术，侧脑室外引流术，胸腔闭式引流术，腹腔穿刺术，胃肠减压术，耻骨上膀胱穿刺术，导尿术，颅骨牵引术，骨髓穿刺术，各种骨折固定和牵引术，静脉切开术，娴熟的清创缝合术等。总的说来，我能胜任外科各科室临床常规工作并组织住院医师进行急救工作。

To observe and analyze the time of chest tube insertion,the intensity of resistance to pulling and drainage effect between the thoracentesis technique of invented minute invasion closed-chest drainage and traditional closed-chest drainage.

利用家犬自体股动脉穿刺采血注入一侧胸腔、同时注入等量盐水及空气的方法建立家犬血气胸模型，并将其随机分成实验组（n=12）和对照组（n=12），观察分析自制微创胸腔闭式引流装置与传统胸腔闭式引流装置的置管时间、抗拉强度、引流效果等。

Methods: The portable first aid package, 26cm×17cm×5cm in size, consisted of a closed drainage tube (thoracentesis needle, air pocket fixed inside and washing pipe), folded drainage bag and appendages for operation.

自行设计并制备便携式野战创伤性血气胸救治包，配备有胸腔闭式引流管（穿刺针、固定气囊和内冲洗管三合一）、折叠式引流袋及操作附件等。

He was a thermostat Motorized Valve Actuators controls the electric valve motor, and through institutions and reset spring slowdown the valve closed, or closed, while the realization of ZY Series Electric Actuator cold water or hot water pipes pass or break in through the fan coil and other air-conditioning pipe blast in order to achieve the specified temperature of the automatic adjustment.

他是由温控器控制电动阀电机，并通过减速机构和复位弹簧使阀门关或闭，而实现管道冷水或热水的通或断，在通过风机盘管及其他空调管送风，以实现指定室温的自动调节。

This technique is to make a device to instead those transmitters and reduce the need in pressure gauges. Using the electronic valve and flexible tube to construct the control panel is effective to connect the single pressure gauge with every sensor point in ventilation duct.

利用软管将欲量测之管段的压力导引到控制箱内，并将所有导引来的静压分别安装在一组并联的各电磁阀上，再将所有的动压分别安装在另一组并联的各电磁阀上，而该两组并联电磁阀的底部各安装一根连通管连结至单一差压计的高低压两端，并利用控制组件切换各电磁阀的启闭以达到多点压力监测切换的目的。

This technique is to make a device to instead those transmitters and reduce the need in pressure gauges. Using the electronic valve and flexible tube to construct the control panel is effective to connect the single pressure gauge with every sensor point in ventilation duct.

利用软管将欲量测之管段的压力导引到控制箱内，并将所有导引来的静压分别安装在一组并联的各电磁阀上，再将所有的动压分别安装在另一组并联的各电磁阀上，而该两组并联电磁阀的底部各安装一根连通管连结至单一差压计的高低压两端，并利用控制元件切换各电磁阀的启闭以达到多点压力监测切换的目的。

The thesis mainly researches on the single phase AC/AC converter in the topologies including AC_Buck and AC_Cuk. Firstly, the operating principles of the two converters are analyzed in detail and the rules of their parameters design are educed; The commutation of their power switches which is the key of these topologies to realize is analyzed in detail and a feasible solution which can be named RCD-Commutation mode is presented and proved effectual by theory analyses and simulation results.

本文首先分析了AC_Buck变换器的变换原理，得出了电路参数设计准则；继而对电路实现的难点即功率管换流问题进行了深入分析，并得出了一种可行的解决方案即RCD换流方案；作为对简单拓扑单相直接AC/AC变换器控制策略的探索，本文以AC_Buck为平台，对电压单闭环瞬时值控制方案进行了研究，在理论分析和仿真研究的基础上设计并制作了一台采用RCD换流、电压单闭环瞬时值控制的AC_Buck变换器原理样机。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。