目的检测诊断X射线机的管电压和曝光时间。
Objective To measure the take voltage and exposure time of diagnostic X-ray machine.
结果感兴趣区像素值均值基本不随管电压和毫安秒的变化而改变。
Results the pixel mean value of the image in region of interest was not influenced by the exposure tube voltage or mAs.
引起高剂量的原因主要是荧光照射时间、拍片数量和DSA中较低管电压。
Caused high dose is mainly due to fluorescence exposure time, film number and the use of lower tube voltage of DSA.
实验比较了高计数率下三种光电倍增管电压供给方式的增益变化和温度效应。
The gain stabilities and temperature effects were experimentally for three different bias voltage supply modes to photomultipliers at high counting rates.
该拓扑具有所有功率开关均为软开关，输出二极管电压应力低和输入输出滤波器小的特点。
There are soft switching conditions of all switches, low voltage stresses on the output diodes, and smaller input and output filters in this topology.
这种结构的双向变换拓扑解决了电流型一电压型组合式拓扑的开关管电压尖峰问题和启动问题。
The proposed bi-directional converter has no high voltage spike problem and start-up problem, which are inherent in current-fed and voltage-fed hybrid type bi-directional converters.
与此同时，Q3的源电流通过D1流到R4，从而拉动R4的电压，使二极管电压降到低于电源。
At the same instant, Q3 sources current into R4 through D1, thereby pulling the voltage on R4 to a diode drop below the supply voltage.
设计制作出一个幅值可调的恒流源及其测试系统，实现稳压二极管电压漂移参数的检测，至关重要。
To design and manufacture a constant-source with adjustable amplitude value and the test system, and to realize the examination of zener diode voltage drift parameter, is very important.
目的：通过测试数字成像设备的X线机管电压和曝光时间稳定性，探讨数字成像摄影条件的选择原则。
Objective:To obtain suitable digital radiologic exposure factors of CR and DR by measuring stability of their X-ray tube voltage and exposure time.
结果根据不同摄影参数下的空间分辨率分布情况，获取优化的CR下肢全长摄影的管电压和毫安量参数。
Results Optimal tube voltage and milliampere parameters of the full-length leg projection was acquired in terms of the distribution of spatial resolution under different parameters of exposure.
作者以体模实验为基础，测定了不同管电压拍摄胸片时的病人剂量，考察了提高管电压对胶片影像质量的影响。
On the basis of phantom experiments, patient doses from radiography at different tube voltages were estimated, and effect of elevated tube voltages on quality of film image was studied.
传统交错并联双管正激组合变换器应用于高电压输出场合时存在变换器次级电压偏高、高频整流二极管电压应力大的问题。
The traditional interleaved two transistor forward converter exists high voltage stress of freewheeling diode when applied in high output voltage condition.
仿真和试验结果显示，漏感能显著影响均衡电路工作模态，开关管电压，均衡电流等，需要在均衡电路实际设计时仔细考虑。
Simulations and experiments show that leakage inductor can affect the operation mode, switch voltage and equalization current, etc and should be consider carefully.
通过三电平拓扑和传统两电平拓扑电路的对比分析，得出了相同先决条件下这两种拓扑中开关管电压应力和电感电流可减小的幅度。
By analyzing the current ripple of the inductor and voltage stress of switches at the same conditions, the reduced value of the current ripple and voltage stress with three-level topology can be got.
如果管中的电压足够高的话，气体放电管将会发光燃烧。
And so if he gets the voltage high enough, this gas discharge tube will glow.
该设计还包括一个线驱动操纵系统，它以电子系统取代机械流程，使用像电致发光或灵活发光二级管棒这样的低电压照明技术。
The design also includes a drive-by-wire system, which replaces mechanical with electronic systems, and low-voltage lighting technologies like electroluminescent or flexible LED strips.
当电容器电压达到一定程度，它便会激活晶体管；晶体管打开，雨刷运转一次。
When the voltage in the capacitor reached a certain level, it triggered the transistor; the transistor turned on, and the wipers wiped once.
如今首批设计的民用电网电压的能直接替代白炽灯泡的发光二极管已陆续上市.
Now the first mains-voltage LEDs designed as direct replacements for incandescent bulbs are arriving on the market.
改变输入电压能降低屏障并增加晶体管电流，正如加入酶使化学反应加速一样。
Changes in the input voltage lower the barrier and increase current flow in transistors, just as adding an enzyme to a chemical reaction speeds it up.
这种类型的臭氧是有毒的。医用臭氧是管生产的高电压通过临床氧气。
This type of ozone is poisonous. Medical ozone is produced by passing clinical oxygen through high voltage tubes.
该Flexfet晶体管设计新颖，可以改善标准CMOS工艺中的分伏设计和电压调节等。
The novel design of the Flexfet transistor brings many benefits not realized in standard CMOS processes, which enable sub-volt designs and supports continued voltage scaling.
具有12位LED数码管显示，可分别显示电压、电流、计数值。
With 12 LED digital display, can show the tube voltage, current and count value.
尤其适合以igbt作为主功率开关管的高电压、大功率功率变换，具有广泛的应用前景和巨大的经济价值。
So this novel converter has a wide application and huge economy effect in power converting field, especially in the high voltage and high power feild where IGBT is used as the main switch.
不同偏置电压的输入缓冲晶体管。
源-测量单元还可以测量其它的二极管参数，包括正向电压降和击穿电压。
The Source-Measure Unit can also test other diode parameters, including forward voltage drop and breakdown voltage.
放大器输入为电压信号，与光敏二极管产生的光电流信号成比例。调制光柱以断路器同样的频率照射光敏二极管。
The amplifier input is a voltage proportional to the photocurrent signal produced by a photodiode, which is irradiated by a modulated light beam at the same chopper frequency.
由于流过齐纳二极管的泄漏电流会在电阻器上产生电压降，所以希望使用低漏电的齐纳二极管。
Since the leakage current through the zener diodes results in a voltage drop across the resistor, low leakage zener devices are desirable.
使每个连续的光电倍增管电极的电压都比它前面一个电极的电压更高，这样电子就得到加速。
Electrons are accelerated by making the voltage of each successive dynode of the tube more positive than the previous one.
三极管能升高电压。
拥有更低峰值电流和场效应晶体管漏源极开通电压的800伏特准谐振设计展示出一次侧传导电磁干扰降低的优势。
The 800v quasi resonant design with lower current peak and lower drain-source voltage during turning on of the MOSFET demonstrates advantages in conducted EMI spectra regarding the primary side.
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