泄漏通信与立井井筒提升机信号闭锁功能开发

针对立井井筒作业安全系数要求较高的问题,开发了一种泄漏通信与提升机信号闭锁功能,用以实现在立井井筒检修过程中采用泄漏通信手持对讲机打点对提升机信号进行闭锁、解锁操作;详细介绍了通过提升机信号系统的改造和通过提升机电控系统的改造2种途径实现该闭锁功能的方案。实际应用表明,该功能实施后,立井井筒作业人员可直接参与提升机控制,不需要开车时即闭锁提升机信号,提高了立井井筒作业的安全性。     

基于畅通可靠性分析的城市道路改扩建优化决策

基于系统阻塞发生概率，建立了阻塞常发的高峰时间城市交通网络单元及系统畅通度的基本概念，并 提出了相应的评估方法．同时通过单元畅通重要度的评估，建议了路网改扩建的优化策略．     

活性自转向稠化酸解堵技术在克拉玛依油田的应用

报道了将活性自转向稠化酸用于高温高压裂缝－孔隙型油藏油吉酸化解堵技术,概括介绍了活性自转向稠化酸的基本组成和性能指标,作用原理,解堵工艺,详细介绍了用活性自转向稠化酸对新疆克拉玛依油田石田作业区油井酸化解堵的应用效果。     

封端异氰酸酯的制备及其解封研究

用甲乙酮肟(MEKO)对端NCO预聚体进行封端,考查了不同的封端率对端NCO预聚体黏度的影响.用TGA、DSC、TG-IR等对封端聚氨酯解封过程进行研究.实验结果表明,当封端聚氨酯中残余NCO%低于0.1%时,贮存期可达1年以上.H'NMR分析表明,端异氰酸酯封闭成功.MEKO封端的聚氧酯在105℃解封,与聚醚胺混合后...     

基于DWT和SVD的改进分块图像水印算法

为同时提高水印不可见性与鲁棒性,提出一种基于DWT和SVD的改进图像水印算法．先将载体进行小波变换,然后在分块后进行奇异值分解,根据自适应原理选取嵌入数据进行水印嵌入．检测水印不需原图像,属于盲检测算法．实验结果表明,该算法增强了水印鲁棒性,且提取水印精确度更高．与单独块奇异值分解量化法作比较．实验证明,本算法具有更好的优势．     

PLC解除闭锁信号的特点及应用

当远方保护的允许信号通过电力线载波通道传输时,如遇通道中断,收信侧可能因未收到该允许信号而造成保护拒动.在这种情况下,解除闭锁信号可以代替允许信号,防止上述情况的发生.文章简述远方保护信号在电力线载波通道中的传输原理,从电力线载波通信的视角深入分析解除闭锁信号的产生原因、特点及对远方保护命令传输的影响.通过工厂试验和现...     

载波纵联保护一侧未有“output1”命令原因探析

以一起典型的线路单相接地故障为例。揭示了输电线路两端4台载波机中的一台未接收到“outputl”命令的真正原因,并通过事后分析说明了载波允许式保护设置解除闭锁信号（Unblocking）的必要性;阐述了线路单相接地不同故障点对载波高频通道衰耗的影响;指出了在产生解除闭锁信号的主要原因中,载波机故障、通道中断等硬故障较容易被发现,而载波机收信裕度不够或线路故障时引起的电弧强干扰会使载波高频通道信噪比瞬间大幅降低。因此而导致的载波设备收信中断则很难判断;最后总结了防止解除闭锁信号频繁出现的有效措施。     

Blocking and Unblocking in Human Causal Learning.

Three experiments sought to develop the suggestion that, under some circumstances, common associative learning mechanisms might underlie animal conditioning and human causal learning, by demonstrating, in humans, an effect analogous to the unblocking by reinforcer omission observed in animal conditioning. Experiment 1 found no such effect. Experiment 2, designed to prevent inhibitory influences that might have masked excitatory unblocking in Experiment 1, demonstrated unblocking, indicating common human-animal associative learning mechanisms in which the associability of a stimulus varies as a function of its predictive history. Experiment 3, using a similar design but with a procedure promoting application of rational inference processes, failed to detect the same unblocking effect, indicating that associative and cognitive mechanisms may influence human causal learning. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

物理法采油新技术的研究与应用

针对油层常规(酸化、压裂等)大型增产措施经济成功率低的实际状况,开展了四种物理法(电脉冲、超声波、液态压裂、无电缆射孔)改造油层新技术,清除油气通道的污染和堵塞,改善油层渗透性能、降低原油粘度,达到油水井增产增注的目的。     

Variations in Unconditioned Stimulus Processing in Unblocking.

Three experiments examined the mechanisms by which downward shifts in reinforcer value influence learning in appetitive unblocking procedures. The downward shift was accomplished by omitting the 2nd of a 2-reinforcer sequence (food-food or food-sucrose). Performance of normal rats was compared with that of rats with lesions of the central nucleus of the amygdala, which are thought to interfere with surprise-induced enhancements of event processing. The results suggested that, in normal rats, omission of the 2nd reinforcer enhanced processing of the 1st reinforcer rather than processing of the conditioned stimuli and that lesions of the central nucleus eliminated this enhancement. The roles of reinforcement error signals in conditioning are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)