模转换

In front of the A/D converter in an analog conversion system is usually located a sample-and-hold circuit.

在模拟量转换系统中在模/数转换器的前端通常都会有一个采样-保持电路。

We find the poles of determinant of the S-matrix are equivalent to the zeros of the Wronskian in the Laplace picture.

在散射的过程里，我们可以定义S-矩阵，而我们发现那些使S-矩阵的行列式发散的模，与在拉普拉斯转换下，Wronskian零点定义下的模是等价的。

In this study, we reported the detailed gating scheme, a gating module and the status of end-station of infrared microspectroscopy. Utilizing both noise eliminating system and technique of synchrotron-radiation-based FT-IR, we successfully acquired subsequently spectra and spectral images.

在本文中将详细说明此逻辑闸模组机制与红外显微光谱实验站之现况，经由此逻辑闸模组控制和同步辐射傅立叶转换红外显微技术，不但可提供量测样品於中红外光区的分子振动吸收光谱，更可利用样品中不同成分物种之特徵吸收，以建立红外光谱影像。

S. pump wavelength and pump power were discussed.Secondly, the spectrum broadening due to the cross phase modulation in DSF was analyzed, and the principle and experimental setup of actively mode-locked Erbium-doped fiber laser was introduced.

第四章对交叉相位调制效应导致频谱展宽的原理进行了分析，介绍了主动锁模掺饵光纤激光器产生锁模脉冲的原理及实验，对基色散位移光纤交叉相位调制的波长转换进行了实验研究。

The bench-scale equipment of numerical control simulates, the high-performance number electricity mold electricity bench-scale equipment, PLC programs laboratory bench, air operated PLC controls laboratory bench, the microcomputer control central air conditioning laboratory bench, the sensor engineering laboratory equipment; Automobile teaching equipment: PASSAT entire vehicle model, program control showing board, military cross-country vehicle teaching aid series, automobile driving analogous system; multimedia electricity-teaching room, multimedia language sound chamber, entire digital language sound chamber, language study system, teaching VCD series; machinery exhibition cabinet series, hydraulic transmission demonstration, electrical machinery electricity laboratory, project charting laboratory; the electrical machinery controls the laboratory bench, the electron bench-scale equipment, the electrician bench-scale equipment, counts the electricity, the mold electricity laboratory, the micro electricity connection laboratory, the electric power drives laboratory, the microcomputer test installation; central air-conditioning test installation, refrigeration system hot test installation, electrical appliances synthesis test installation; teaching wall map series, teaching blackboard series; The finance and accounting simulates laboratory, simulates the bank laboratory; medicine teaching model; transparent elevator laboratory bench, transparent electrical machinery model, transparent lathe engine bed; universities specialized laboratory bench, physics bench-scale equipment, chemical laboratory equipment, biology bench-scale equipment, middle school necessary instrument.....

数控模拟实验室设备，高性能数电模电实验室设备，PLC编程实验台、气动PLC控制实验台，微机控制中央空调实验台，传感器技术实验室设备；汽车教学设备：帕萨特整车模型、程控示教板，军用越野汽车教具系列，汽车驾驶模拟系统；多媒体电教室，多媒体语音室，全数字语音室，语言学习系统，教学VCD系列；机械陈列柜系列，液压传动演示台，电机电气实验室，工程制图实验室；电机控制实验台，电子实验室设备，电工实验室设备，数电、模电实验室，微电接口实验室，电力拖动实验室，微机实验设备；中央空调实验设备，制冷制热实验设备，家电综合实验设备，教学挂图系列，教学黑板系列；财会模拟实验室，模拟银行实验室；医学教学模型；透明电梯实验台，透明电机模型，透明车床机床；高校专业实验台，电工实训室，电气实训室，单片机实训室，自控原理实训室，电力电子实训室，自动检测与转换实训室，过程控制实训室，电机原理实训室，电机维修维护实训室，可编程序控制器实训室，机电设备安装实训室，机电设备拆装实训室，电气自动化技术教研室，机电一体化综合实训室，数控教学实训室，数控加工实训室，楼宇自动化实验室，自动化设备陈列室，电子测量实验室，液压与气动实验室，工业仿真模型实验室，机电设备故障诊断与维修实训室，物理实验室设备，化学实验室设备，生物实验室设备，中学配套仪器。。。。。

The bench-scale equipment of numerical control simulates, the high-performance number electricity mold electricity bench-scale equipment, PLC programs laboratory bench, air operated PLC controls laboratory bench, the microcomputer control central air conditioning laboratory bench, the sensor engineering laboratory equipment; Automobile teaching equipment: PASSAT entire vehicle model, program control showing board, military cross-country vehicle teaching aid series, automobile driving analogous system; multimedia electricity-teaching room, multimedia language sound chamber, entire digital language sound chamber, language study system, teaching VCD series; machinery exhibition cabinet series, hydraulic transmission demonstration, electrical machinery electricity laboratory, project charting laboratory; the electrical machinery controls the laboratory bench, the electron bench-scale equipment, the electrician bench-scale equipment, counts the electricity, the mold electricity laboratory, the micro electricity connection laboratory, the electric power drives laboratory, the microcomputer test installation; central air-conditioning test installation, refrigeration system hot test installation, electrical appliances synthesis test installation; teaching wall map series, teaching blackboard series; The finance and accounting simulates laboratory, simulates the bank laboratory; medicine teaching model; transparent elevator laboratory bench, transparent electrical machinery model, transparent lathe engine bed; universities specialized laboratory bench, physics bench-scale equipment, chemical laboratory equipment, biology bench-scale equipment, middle school necessary instrument.....

教学设备、教学仪器、教学模型、教育设备、数控模拟实验室设备、高性能数电模电实验室设备、 PLC编程实验台、气动PLC控制实验台、微机控制中央空调实验台、传感器技术实验室设备、汽车教学设备、帕萨特整车模型、程控示教板、军用越野汽车教具系列、汽车驾驶模拟系统；多媒体电教室、多媒体语音室、全数字语音室、语言学习系统、教学VCD系列、机械陈列柜系列、液压传动演示台、电机电气实验室、工程制图实验室、电机控制实验台、电子实验室设备、电工实验室设备、数电、模电实验室、微电接口实验室，电力拖动实验室、微机实验设备、中央空调实验设备、制冷制热实验设备、家电综合实验设备、教学挂图系列、教学黑板系列、财会模拟实验室、模拟银行实验室、医学教学模型、透明电梯实验台、透明电机模型、透明车床机床、高校专业实验台、电工实训室、电气实训室、单片机实训室、自控原理实训室、电力电子实训室、自动检测与转换实训室、过程控制实训室、电机原理实训室、电机维修维护实训室、可编程序控制器实训室、机电设备安装实训室、机电设备拆装实训室、电气自动化技术教研室、机电一体化实训室、数控教学实训室、数控加工实训室、楼宇自动化实验室、自动化设备陈列室、电子测量实验室、液压与气动实验室、工业仿真模型实验室、机电设备故障诊断与维修实训室、物理实验室设备、化学实验室设备、生物实验室设备、中学配套仪器。。。。。

Leibnizobserved the similarity and interchange between deontic modality and traditional modality.

莱布尼茨注意到道义模态和传统的模态之间的类似和转换。

Firstly, we research the Vlasov antenna with reflector mainly. A new method to calculate the radiation of the antenna is founded with Vectorial Theory of Diffraction, and the corresponding program is made. The reflective characters of Vlasov antenna are studied with Moment Methods, and the results show that the total reflected energy is less than 0.25%. The radiation patterns of the antenna are analyzed, and the formulas to estimate the wave beam parameters and to design the antenna are provided. The feasibility of radiating high-order modes by Vlasov antenna is also discussed and verified. The hermetization of the Vlasov antenna is researched and the results show that with such kinds of hermetization the antenna can work under gigawatt level. The design of the mode converter from TEM to TMoi is studied, which is useful when the TEM coaxial mode is radiated by Vlasov antenna. At last, the flared-end Vlasov antenna is also discussed.

在Vlasov天线方面：用矢量绕射理论建立了天线辐射场的计算模型并编写了计算程序，该程序计算结果在主瓣上与实验测量吻合良好，近旁瓣也基本一致；利用矩量法计算了天线的反射系数，表明该天线有较小的反射，总的能量反射小于0.25％；详细分析了天线的辐射特性，给出了天线辐射波束相关参数的估算公式和天线设计公式；进一步研究和论证了Vlasov天线辐射高阶轴对称模的可行性；对天线的密封方式和功率容量进行了讨论，结果表明在不需很大密封罩的情况下可以获得GW级的功率容量；为了用Vlasov天线辐射同轴TEM模，研究了TEM-TM_(01)模式转换器的设计，得到了一些基本规律；最后，介绍和分析了带有锥形喇叭的Vlasov天线。

Here, the shunt DEVICE 's function is to protect the PORT from differential surges, a differential surge will be balanced between conductors by the shunting DEVICE , converted to common mode. The isolation provides protection from the common mode transient remaining.

图中，分流器的功能是保护接口的浪涌差，即分流器件使得浪涌差转换成共模电压而维持导线间的平衡；而隔离则持续提供共模transient保护。

In addition, an effect to enhance immunity against noises and reduce the radiated emission and mode conversion of the filter by twisting positive and negative pair is described. Finally, an equivalent circuit model is described and circuit parameters extracted illustrate the effects of routing topologies and structural parameters on filter's performance.

之后再将无遮蔽双绞线结构以多层板的方式实现，设计出一双绞线式的多层共模滤波器，增加元件抵抗杂讯的能力和减少自身辐射及模态转换所产生的干扰现象，最后利用等效电路来诠释这三种不同结构的特性表现，分析改变结构对电路参数所带来的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。