油井测压器及其在射孔工艺研究中的应用

为了获得射孔和高能气体压裂等完井工艺中井下的动态压力数据,对射孔工艺进行了深入的机理研究,研制了一种油井测压器。该测压器采用存储测试技术,实时记录射孔及压裂时井下环空压力的变化。通过各油田的实测数据表明,该仪器能很好地完成井下各动态参数的测量,并且具有精度高、易使用等特点,为评价射孔枪的井下工作性能以及完井效果提供了重要的依据。     

高精度井下存储式电子压力计的设计

为了更准确地测取地层压力数据,研制了高精度井下存储式电子压力计.该压力计由井下仪器和地面处理2个部分组成:井下仪器以ADuC834单片机为核心,完成井内压力和温度的采集和存储;地面处理实现井下数据回放和处理.详述了该仪器结构和指标、系统硬件设计以及软件设计方案,并对压力计的性能进行测试.测试及现场工作表明,该仪表能够实现-40℃～150℃范围内的压力测量,测压精度达到0.05%,满足井下测试要求.     

石油井下压力测试系统的研究与设计

针对常规井下射孔压力测试系统体积大、功耗高、不耐高温等问题,研制了一种井下射孔压力数据采集与存储测试系统,用于深井及作业周期长、高温、高压、高;中击等恶劣环境。从实际应用需求出发,给出了系统总体设计方案及其实现原理和测试系统的技术指标,重点介绍了低功耗以及变频采样的实现原理。经过大庆油田测井现场实验,结果表明,该存储测试系统能够精确的记录下井、射孔和压裂恢复整个施工过程的压力数据,为高质量的打开油气层,进一步研究射孔工艺机理提供理论依据。     

复合射孔及爆燃压裂动态测试数据分析

为了深入研究复合射孔器工作机理,利用高速井下测试仪全面获取了常规、内置式、外套式、爆燃压裂四类射孔/压裂完井工艺的井下动态数据,并结合施工工艺参数对这些数据进行了分析。数据分析显示,四类复合射孔测试的峰值压力在30 MPa~140 MPa之间;压力脉冲持续时间因工作机理不同相差很大:爆燃压裂时间最长为305 ms,常规射孔最短为0.272ms,井下动压作用特性主要取决于复合火药装药量和起爆方式。这些实测数据为建立井下复合射孔动态过程模型和提升复合射孔器性能提供了重要的参考依据。     

基于SOPC技术的井下参数测试仪的开发

针对野外测井作业中大量采集数据需要存储的问题,提出了一种基于SOPC的井下参数测试仪.该测试仪采用激发极化法实现井下参数的测量,以SD卡为数据存储载体、具有USB2.0接口.文中对该系统各硬件模块及其关键技术进行了详细的论述.     

基于LabVIEW的幅频特性测试系统软件设计

针对幅频特性信息采集的专用仪器价格昂贵的问题，自主研制了基于通用信号源和频谱仪的幅频特性测试系统，运用LabVIEW编程语言设计了测试系统软件，实现了仪器的自动控制，数据的自动处理、分析、显示和存储等功能。对前置功率放大器进行了实际测试，将测试结果和Agilent N5230A矢量网络分析仪的测试结果进行了对比，验证了所开发的幅频特性测试系统的有效性。     

基于平板电脑的测井仪器测试系统的设计与实现

测井仪器的维修是一项复杂的工作,工程师需要通过对井下仪器进行反复的测试来调整仪器的性能和检查仪器的故障。基于.NET Framework环境开发,可在平板电脑上运行并通过无线连接和测试测井仪器的测试系统,为测试操作提供了更大的灵活性。系统使用WPF技术进行用户界面设计和各种数据图形的绘制,实现了简洁美观的界面效果和方便的交互操作,为用户带来全新的使用体验和感受。     

基于LabVIEW的测试软件设计

测试应用软件在存储测试系统中的非常重要,它的主要功能是实现计算机和测试仪器之间的通信,能够设置测试仪器参数、采集测试仪器数据,并将这些数据传输到计算机中继续进行处理。本文基于LabVlEW平台,从软件流程、数据接收及存储、数据处理三方面设计了应用型测试软件。     

基于WiFi的无线存储测试系统设计

为了解决传统测试仪器在针对场信号测试时布线麻烦、干扰严重;现有的存储测试系统无法监控各测点状态、数据不能及时回传等问题.提出了一种基于WiFi的无线分布式测试系统,综合运用存储测试和无线通信技术,解决了存储测试中出现的问题.系统在FPGA控制下完成数据采集存储和无线传输等功能.增加了断线重连等无线功能,保证数据传输的可靠性,并对天线进行选择.试验结果表明,系统工作稳定、数据传输可靠,能够对各测试节点进行状态监控、参数设置和数据回读等操作,具有良好的应用前景.     

井下仪器测试系统与PLC控制器应用

本文介绍了PLC控制器在井下环境模拟石油仪器测试系统中的应用。该系统可以模拟石油井下温度和压力等，能够对井下各种仪器的性能指标进行测试和校验。实际使用和运行结果表明，该系统达到了设计的功能和技术指标要求。     

Compact coding of syntactically correct source programs

The technique for compacting source programs is based on recording the path followed by the parser while traversing the syntax tables of the programming language in which the program was written. However, to record every syntactical form visited by the parser would contain redundant information. For example: every syntactically correct Pascal program contains the terminal symbol PROGRAM. Consequently while recording the path followed by the parser, the fact that this terminal symbol has been traversed could be ignored. Therefore, these are techniques for recording only the information which is essential for the decoder to reconstruct the original program by traversing the syntax graph.     

WinCC Global Script在数据存储中的应用

为了解决监控系统中过程数据的处理,通过编写WinCC的G16bal Script,提出了一种新的过程数据记录方法。将过程变量按记录时间生成日志文件和过程数据记录文件。使得对于过程数据的处理更为方便。通过自动生成的索引文件用户可以随时根据需要添加、删除记录的变量,而不需改动Global Script,使得该方法具有扩展性和可移植性。通过G1obal Script处理数据,使得数据采集周期由500ms缩短到250ms。该数据记录方法在实际工程应用中取得了良好效果．可以推广和移植到其他监控系统的数据记录中。     

Provenance and annotation for visual exploration systems

Exploring data using visualization systems has been shown to be an extremely powerful technique. However, one of the challenges with such systems is an inability to completely support the knowledge discovery process. More than simply looking at data, users will make a semipermanent record of their visualizations by printing out a hard copy. Subsequently, users will mark and annotate these static representations, either for dissemination purposes or to augment their personal memory of what was witnessed. In this paper, we present a model for recording the history of user explorations in visualization environments, augmented with the capability for users to annotate their explorations. A prototype system is used to demonstrate how this provenance information can be recalled and shared. The prototype system generates interactive visualizations of the provenance data using a spatio-temporal technique. Beyond the technical details of our model and prototype, results from a controlled experiment that explores how different history mechanisms impact problem solving in visualization environments are presented     

HSK(高等)口语考试系统的开发与应用

在口语考试中，采用计算机进行录音，比起传统的录音机录音，具有许多优点。HSK（高等）口语考试系统，基于C／S结构，通过调用Total Recorder录音软件进行口语考试。利用注册表，在程序中可以与Total Recorder进行信息交互。     

硬盘记录信息可视化检测技术

提出一种基于软件实现的硬盘记录信息可视化检测技术。该技术可以精确定位到特定磁道,从硬盘控制电路有关测试点采集未经磁头读写通道处理的原始电磁信号,经滤波处理,按电磁公式由电磁信号推导出硬盘盘片表面磁场强度分布情况,最后以图像形式实时反映这一情况,完成对硬盘记录信息的可视化检测。     

Electric field modulated specklegram phase multiplexing technique for volume holographic

We report a speckle-based hologram multiplexing recording technique, in which a multimode LiNbO₃ single crystal fiber is employed to generate speckle patterns of reference beams in hologram recording process. By applying an external E-field, the speckle pattern generation and reconstruction can be precisely controlled. A theoretical analysis and a numerical simulation of speckle pattern generation have been conducted. According to the simulation results, this technique can generate thousands of decorrelated reference beams at given practical constraints. The storage capacity can be scaled up as material properties are improved, making this technique well adapted to new material development. The text was submitted by the authors in English.     

基于SSH的儿童成长管理系统设计

对儿童成长信息进行科学管理,有利于追踪儿童的成长轨迹,实现儿童生理和心理健康的实时监控,及时发现儿童成长过程中存在的问题并加以解决。针对儿童成长信息管理的需求,设计了一种基于SSH的儿童成长管理系统。该系统使用SSH框架开发,采用B/S架构,具有注册模块、登录模块、成长指标模块、记事本记录模块、照片记录模块、视频记录模块、病历模块、疫苗接种模块、健康知识模块、儿童管理模块、个人信息模块等12个功能模块。详细介绍了系统架构设计、功能设计、数据库设计和程序设计。对设计的系统采用黑盒测试的方法进行了集成测试,采用10个分布于不同位置的客户端访问系统,逐个测试系统的功能模块是否满足要求。系统测试完善后,对系统进行了应用。测试与应用结果表明,该系统很好地实现了相应的功能,运行效果良好。     

Post-Failure Reconfiguration of CSP Programs

In this paper a technique called process merging is introduced. This technique allows the merging of two communicating sequential processes into a new single process. Thus, this technique can be used to reconfigure a distributed program after a faulty processing element has been detected. The technique is most applicable to dedicated multiple microprocessor systems where the need for continuous operation is critical. A process merging algorithm which operates on distributed programs using the CSP notation is presented in detail and its operation is discussed. In order to illustrate the merging technique, the algorithm's behavior is demonstrated using two classical distributed programs: the Bounded Buffer, Producer, Consumer program and the Dining Philosophers program. Finally, the merging technique is examined with respect to its demands on overall system operation and overhead. This examinatiQn leads to suggestions for future research.     

A video monitoring technique for investigating computer-based learning programs

Few studies of computer-based learning materials concentrate upon the learner-computer interaction. Fewer studies have focused on the way children learn science using computer-based learning programs. The studies that have been done employed observational methods. A video monitoring technique, which produces a synchronized record of the computer output and the children's use of the computer program is described. The technique affords a greater precision of data than observational techniques. A study which employed this technique is described.