摘要：A scanning probe microscope(SPM)stage controlled by three stepper motors is designed,which has more flexibilitiesthan that of one motor controlled stage,while the control whom is more *** this project,we build the stageactions in an Arduino microcontroller,and finite state machine(FSM)is also built in the Arduino micro controller to communicatewith a computer and a radio frequency(RF)controller.A special displaying scheme with five states is employed to indicatethe operation of the ***,the stage is fully tested and has a700nm resolution in Z motion of the SPM.

摘要：In this work,an old scanning electron microscope(SEM)is refurbished to enhance its image processing *** to digitally sample and process an analog image is also *** NI PCI-6259 multiple input/output data acquisition(DAQ)board is used to acquire signals originally being sent to an analog display,and then convert the signals into a digital *** output channels are used for raster scan of the horizontal and verticle axes of the image buffer,while one input channel is used to read the brightness signals at various coordinate *** method is used to maximize the DAQ ***,the digitally buffered images are read out to display and saved in a hard *** hardware and software designs of this work are explained in great detail,which can serve as a very good example for fast synchronous DAQ,advanced virtual instrument design and structural driver programming with LabVIEW.

摘要：A simple,stable and reliable virtual logic analyzer is presented. The logic analyzer had two modules:one was the test pattern generation module,the other was the logic monitoring module. Combining the two modules,one is able to test a digital circuit automatically. The user interface of the logic analyzer was programmed with LabVIEW. Two Arduino UNO boards were used as the hardware targets to input and output the logic signals. The maximum pattern update rate was set to be 20 Hz. The maximum logic sampling rate was set to be 200 Hz. After twelve thousand cycles of exhaustive tests,the logic analyzer had a 100% accuracy. As a tutorial showing how to build virtual instruments with Arduino,the software detail is also explained in this article.

摘要：A fully automated atomic force microscope(AFM)is *** mechanical motion of the AFM stage was controlled by three *** fine motion of the AFM was controlled by an MCL one-axis piezo plate.A32.768kHz crystal tuning fork(TF)was used as the transducer with a probe *** acoustic sensor was used to measure the interactions between the probe and the *** SR850lock-in amplifier was used to monitor the TF *** additional lock-in amplifier was used to monitor the acoustic signal.A field programmable gate array(FPGA)board was used to collect the data in automatic *** main controller was coded with LabVIEW,which was in charge of Z-axis scan,signal processing and data visualization.A manual mode and an automatic mode were implemented in the *** can switch the two modes at any time during the *** AFM system showed several advantages during the test *** is simple,flexible and easy to use.

摘要：The purpose of this article is to reduce the barrier of developing a house made scanning probe microscope （SPM）. Here in this paper, we cover all the details of programming an SPM controller with LabVIEW. The main controller has three major sequential portions. They are system initialization portion, scan control and image display portion and system shutdown portion. The most complicated and essential part of the main controller is the scan control and image display portion, which is achieved with various parallel tasks. These tasks are scan area and image size adjusting module, Y axis scan control module, X axis scan and image transferring module, parameters readjusting module, emergency shutdown module, etc. A NI7831R FPGA board is used to output the control signals and utilize the Z-axis real time feedback controls. The system emergency shutdown is also carried out by the FPGA module. Receiving the shutdown command from the main controller, the FPGA board will move the probe to its XYZ zero position, turn off all the high voltage control signals and also eliminate the possible oscillations in the system. Finally, how to operate the controller is also briefly introduced. That messy wires fly back and forth is the main drawback of LabVIEW programming. Especially when the program is complicated, this problem becomes more serious. We use a real example to show how to achieve complex functionalities with structural programming and parallel multi task programming. The actual code showed in this paper is clear, intuitive and simple. Following the examples showed in this paper, readers are able to develop simple LabVIEW programs to achieve complex functionalities.

摘要：目的观察双清合剂治疗卫气同病证流行性感冒的有效性及安全性。方法采用多中心、随机、双盲、双模拟平行对照、非劣效性试验设计,将240例卫气同病证流行性感冒患者采用分层区组随机化方法,使用SAS软件按1:1随机分为试验组和对照组,每组120例。试验组服用双清合剂和磷酸奥司他韦胶囊模拟剂,对照组服用磷酸奥司他韦胶囊和双清合剂模拟剂,两组疗程均为5日。分别于治疗前、治疗3日、治疗5日时进行访视,评价其主要临床症状缓解时间、完全退热时间、退热起效时间、对乙酰氨基酚使用量、中医证候积分、中医证候疗效、重要临床症状缓解时间、重症/危重流感发生率及安全性。结果试验期间,共脱落/剔除16例(试验组8例、对照组8例),最终纳入符合方案集224例,其中试验组112例,对照组112例。与对照组比较,试验组可缩短头痛缓解时间[28.00(17.75,42.99)h vs.41.00(18.75,59.00)h]、减少肌肉或关节酸痛缓解时间[37.83(12.88,52.77)h vs.38.07(13.50,69.25)h](P0.05)。两组患者不良反应发生率,试验组为4.17%和对照组为1.67%,差异无统计学意义(χ^(2)=1.36,P>0.05)。结论双清合剂可有效缓解卫气同病证流行性感冒的头痛、肌肉或关节酸痛症状,效果优于磷酸奥司他韦胶囊;在改善发热、咳嗽、汗出、面赤、咳黄痰临床症状,减少对乙酰氨基酚使用量,降低中医证候积分方面与磷酸奥司他韦胶囊疗效相当;安全性与磷酸奥司他韦胶囊相当。(中国临床试验注册中心注册***2400087831)。

摘要：分析了国内外石油化工行业生产执行系统的特点,采用分布对象技术,提出了灵活的可组态的生产执行系统体系结构,该体系结构主要由数据平台、业务逻辑和用户界面3个层次构成;针对物料平衡与数据整合的关键问题．提出了基于多维物料移动模型的多层递阶平衡方法;结合石油化工行业的业务知识和领域知识,设计开发了一个炼化一体化的生产执行软件系统——石油化工企业生产执行系统,并在典型企业进行了应用验证．

摘要：文章涉及中国先进研究堆重水浓缩系统的功能、工艺方案和流程设计及系统设计的特点。在系统布置设计中,采用PDSOFT piping配管软件建立了该系统的三维模型,提高了设计效率。

摘要：首先提出了疲劳寿命的各因素灵敏梯度和灵敏度因子计算新方法,接着对确定性设计变量情况下的圆柱筒结构和含不确定性随机变量情况下的圆柱筒结构的疲劳寿命进行了灵敏性分析,得到了在影响耐压厚壁筒概率疲劳断裂寿命的诸多因素中,材料特性常数c,n的总影响比其它因素的影响大得多,c,n的精确性是计算或评估厚壁筒结构疲劳寿命的关键因素,所得结果对圆柱筒结构的设计、制造与使用提供理论依据。

摘要：分析了我国炼化企业的生产执行系统(MES)应用需求,设计了符合炼化企业特点的MES体系结构及其功能模块,并对其关键技术进行了探讨.