查询词典 devices

Signal processing devices can be used analog signal processing devices can also be using digital signal processing devices.

信号处理装置可以采用模拟信号处理装置，也可采用数字信号处理装置。

In this thesis,based on the DFT+NEGF first-principles method,we construct a lead-molecule-lead sandwich system with single benzene-based molecule to investigate the relationship between the structure and properties of the molecular devices and the factors that influence properties of the molecular devices.Our computational investigations on these molecular devices are primarily concentrated on the effect of contact geometry between molecules and electrodes,the effect of side groups,the effect of different torsion angle between two phenyl rings and the effect of external electric field.This thesis consists of five chapters:In Chapter one,we mainly introduce the research background and development of the molecular electronics,including the experimental fabrication of molecular electronic components and theoretical simulation methods.Afterwards we discuss the questions that need to be solved in this area.Finally,the main contents of this thesis are listed.In Chapter two,we introduce the theoretical methods used in this thesis, including the main first-principles calculation methods,i.e.,the Density-Functionmethod and nonequilibrium Green\'s function.

本论文拟采用密度泛函理论和非平衡格林函数相结合的第一性原理计算方法，选取苯基小分子作为研究对象，构建了金属电极/有机小分子/金属电极三明治结构体系，系统地研究了苯基分子器件结构的改变与分子电输运性质之间的关系以及影响分子器件电输运性质的相关因素，其中重点研究了分子与电极间可能的接触结构改变、官能团、分子间的扭转角以及外电场对苯基分子电输运性质的影响，本论文主要包括以下五个章节的内容：第一章为综述部分，主要介绍了分子电子学产生的背景、分子器件的研究意义、当前研究分子器件的实验和主要理论方法，以及目前在研究分子器件中存在的一些问题，最后给出了本论文的主要研究内容和技术路线。

Fiber coupler is one of the most important devices among fused taperfiber devices. Its usage ranks second among the optical passive devices.It is used for separating or coupling light. At.present, it is fabricated withfused biconical taper technology at large.

熔锥型光纤器件中最为典型的器件是光纤耦合器，其用量在光无源器件中居第二位，其功能是使传输中的光信号在特殊结构的熔锥区发生耦合，实现分光。

Firstly, oscilloscope control system based on GPIB technique is presented with friendly operation environment to the HIFU system, and it uses multithreading technique in programming to realize real-time recording and display of the signal; Secondly, temperature collection and data recording system is designed, which also could get real-time recording and display of the 16 channel temperature signal, and it's believed to be of great use for further experiments of the HIFU system; Thirdly, multiple ultrasonic phased array's phase shifter is designed,which could provide 8-bit phase control in a range of frequency where the centrical frequency is 1MHZ. Fourthly, the module of serial communication is realized to insure the communication between devices and computer, including both synchronous and asynchronous communication, which enables the system to transfer data reliably and stably; Finally, the module of digital quantity control is accomplished, which provide for upper application the consistent solution to the control of exterior devices via digital interface. It can get or set the devices state using interrupt mode to receive input signal or send output signal.

主要有以下几个方面：设计了基于GPIB的示波器控制系统，给课题的研究工作提供了一个良好的环境，它采用了多线程编程的方法，能够较好的实时显示当前波形并记录数据；设计了温度采集和数据记录系统，能够对16路温度信号进行并行同步的实时采集，用于HIFU剂量学研究中温度场检测和医疗评价；设计了相控阵相位延时电路并且通过调试，满足了课题的相位控制的要求，在中心频率为1MHZ左右的频率范围内都能够达到8-bit相位控制；实现了串口通讯模块，为各项设备与计算机之间的通讯提供保证，它提供同步和异步的通讯能力，使系统能够可靠稳定的传输数据；建立了数字量控制模块，为上层应用程序提供一致的方法使用数字接口控制外部仪器，它使用中断的方式来接收输入或输出设定的开关量信号，从而得到或设定各种仪器的状态。

However, because of the manual operation mode, which makes dataread and record randomly and trustlessly, and the diverseness of the detector'scapabilities, the current detecting ways for the train tail devices can't confirm theusing devices well worked. Making sure the reliability of the train tail devices andimproving the working safety have been an urgent problem to be resolved.

但现有的列尾装置检测，均由人工手动完成，读数、记录、随意性强，可靠性低，更由于现场检测人员业务素质参差不齐，责任心有高有低，不能保证投入运行的列尾装置均能正常使用，因此，如何确保列尾装置的可靠性，提高行车安全，已成为急迫需要解决的一个问题。

When compensating devices are switched by vacuum switches, if they are switched on group, the inrush current can be controlled by inserting suitable current-restrained reactance in-series. Since the restriking overvoltage is pertinent to the capacity of compensating devices and the time of restriking and igniting, the overvoltage can be restrained by arresters with asterism connection at the entrance of the capacitors. Although switching capacitance devices will bring up high interception cross overvoltage, the metal-oxide arrester can limit this overvoltage in the system designed in the thesis, and naturally the compensating devices can operate normally.

使用真空开关投切并联无功补偿装置，在分组投入并联电容器时，串联合适的限流电抗，合闸涌流可以得到控制；重燃时的过电压值与并补装置补偿容量，重燃发生时刻和燃弧时间有关，电容器进线端的三星接法避雷器可以抑制其过电压；切并联电抗器时会产生较高的截流过电压，金属氧化物避雷器可以使本文中所建系统的截流过电压得到限制，并联无功补偿装置可以正常切合。

Research on Design Theories and Methods of Unseating Prevention Devices Based on the seismic standard of China, the design theories of unseating prevention devices were presented, according to the response spectrum of random loading and the fortify intensity at expansion joints, the design method was put forward. In the light of the use of unseating prevention devices at home and abroad, the choice and methods for installation of the devices are introduced and compared.

4连梁装置设计理论与方法研究考虑场地土的不同地震动参数和桥梁等级的不同，在论文中引入桥梁地震荷载重要系数，并根据冲击荷载的反应谱，提出连梁装置的设计地震力力和位移计算方法；参照国内外的连梁装置设计使用的现状，介绍了多种类型连梁装置的选用及安装方法；对连梁装置缓冲部分不同的构造进行了试验。

Beijing Yuankun Universe Science Technology Co,Ltd is a high-tech enterprise in the Zhongguancun Science Technology Plot at Haidian District of Beijing; it is a specialized company engaged in immigrating devices, communication devices and electronic devices; it is a specialized supplier for electronic devices and components and the agent of many famous companies in the world including Agilest Technologies Co.

简介北京元坤伟业科技有限公司是北京海淀中关村科技园区高新技术企业，是经营模拟器件、通信器件和光电器件的专业化公司是专业化的电子元器件供应商，世界许多著名公司的代理商。

Beijing Yuankun Universe Science Technology Co,Ltd is a high-tech enterprise in the Zhongguancun Science Technology Plot at Haidian District of Beijing; it is a specialized company engaged in immigrating devices, communication devices and electronic devices; it is a specialized supplier for electronic devices and components and the agent of many famous companies in the world including Agilest Technologies Co.

公司简介：北京元坤伟业科技有限公司是北京海淀中关村科技园区高新技术企业，是经营模拟器件、通信器件和光电器件的专业化公司是专业化的电子元器件供应商，世界许多著名公司的代理商。

Wherein said first yoke axle is coupled at a right angle to a hinge line of said first one of said controllable devices; wherein said second yoke axle is coupled at a right angle to a hinge line of said second one of said controllable devices; and wherein said hinge line of said first one of said controllable devices is skewed relative to said hinge line of said second one of said controllable devices.

其中，第一枷锁轴耦合在一个直角的铰链线表示，第一个表示可控装置；其中第二枷锁轴耦合在一个直角的铰链线第二之一说，可控装置；和其中说铰线说，第一个说，可控器件倾斜相对说铰线第二之一说，可控设备。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。