摘要：A method of predicting design pressure and burn-through of in-service welding pipes was established. Temperature distributions of in-service welding under variable parameters were simulated by FEM. The effect of flowing of internal media was regarded as forced convection. Based on the numerical results, design pressure of the pipe can be obtained and burn-through can be predicted. It can be concluded that the design pressure decreases with the increasing of heat input. RSF and design pressure of the pipe increase with the increasing of flow rate. There is a range in which the increase changes greatly. For in-service welding, the range should be considered adequately to determine operating condition optimally. RSF increases with the increasing of pipe wall thickness. While the thickness increases to an extent, RSF shows little increase. Accord- ing to the curves of design pressure versus different parameters, safe working pressure can be achieved.

摘要：北京正负电子对撞机重大改造工程(BEPCⅡ)采用的是新型冲击磁铁Slotted pipe Kicker,其结构上要求双极性供电．平衡变压器是实现双极性的关键部件,是解决脉冲源闸流管阴极可直接接地的绝好技术途径．平衡变压器是一种具有特殊用途的高压快脉冲变压器,因此其设计除了要解决高压快脉冲变压器的一般性技术问题外,还必须着重考虑电流平衡度指标．通过理论分析、模拟计算和测试实验证明不平衡电流主要由变压器的励磁电流和磁芯涡流损耗等效电流两部分组成．平衡变压器磁芯材料和几何尺寸选取,以及原副边导体结构设计是实现设计指标的关键所在．样机测试结果与设计计算结果相符,验证了平衡变压器设计理论的正确性,且平衡度D＜1%达到预定指标．

摘要：基于云计算的企业资源管理软件公司Pi ped rive是一家总部位于爱沙尼亚的初创公司,主要业务是为中小企业开发CRM(客户关系管理)软件。pipedrive CRM使用人工智能和自动化来帮助销售团队高效地管理销售线索和交易,从而为业务带来更多收入,是爱沙尼亚5家独角兽公司之一。

摘要：针对现代高性能嵌入式系统高速串行RapidIO(SRIO)信号接入的应用需求,提出一种基于AXI总线的SRIO端点控制器IP核设计方案。以XC5VLX220-FF1760现场可编程门阵列芯片为目标器件,利用硬件设计实现SRIO接口电路。该方案采用合理的硬件结构,能够提高信息采集和输出的时效性。此外,AXI总线能够使SRIO端点控制器IP核更方便地集成到SoC芯片中,可以在片内提供更高的数据传输带宽。利用SRIO协议实现的FPGA内置多DSP IP核,读写操作速率能稳定地达到每通道3.125 Gb/s,表明所提出的IP具有高性能。

摘要：This paper presents and describes the test campaign of a low-cost Loop Heat pipes (LHP) design. LHP have been around for many decades now. Their potential as passive heat transfer devices has been widely demonstrated in numerous both ground- and space-based applications. One of the major disadvantages of LHP is their inherent high manufacturing cost;this is the main factor why LHP are still confined to niche/high end applications such as thermal management of spacecrafts. This paper proposes to use an alternative manufacturing design for the LHP evaporator, which is the main contributor to the overall LHP cost. Preliminary thermal results are also reported and briefly explained. Future work is needed to confirm the promising results discussed in this paper and address fully other issues such as tolerance of this LHP design to vibrations and accelerations typical of space missions.

摘要：In accordance with the application of thermal pipe in the Qinghai-Tibet Railway subgrade project and the research data made on the Qingshuihe experimental field, this paper makes an attempt to illustrate the design principles, basis and technical characteristics, puts forward the problems needing further study, and pipe the reason and tendencyof the longitudinal crack in the subgrade applied with thermal pipe.

摘要：陶瓷罂粟花奔流而下成千上万的陶瓷罂粟在英国伦敦塔被倾泻而出，围绕其城墙像深红色的血瀑布。这戏剧性的画面是一个持续的安装被称为“血恶女土地和红色的海洋”，是Paul Cummins和舞台设计师Tom pipe的装置艺术项目，是为纪念百年前英国参与第一次世界大战的一部分。

摘要：对于无缝钢管超声波探伤设备,采用了先进的可编程控制器(PLC)控制系统。介绍了PLC在系统中的功能;控制系统各个功能的软件设计;PLC和上位机的通信系统,对PLC的工作状态进行实时监控。经测试和现场调试表明,该PLC控制系统满足用户要求,性能可靠。

摘要：首先对目前最为流行的PCI Express总线技术作了介绍,并对其数据的封装及传送流程作了概括,指出其作为第三代总线接口(3GIO)的技术优势。然后重点针对PCI Ex-press总线技术在应用设计中存在的困难,探讨了三种不同的基于PCI Express的系统解决方案,对比分析了各方案的优缺点和适用场合及资源开销,以便开发人员根据不同的需求选用合适的方案快速高效地完成开发。

摘要：预应力钢筒混凝土管（Prestressed Concrete Cylinder pipe，简称PCCP）在国外已有60多年的发展史，我国于20世纪80年代才开始研制，生产PCCP起步较晚，仅有10多年的历史。但由于国民经济快速发展，城市化进程的加快对管材需求量日益增多和PCCP与其他管材相比具有的优良性能以及适于铺设高工压、大口径长距离的输水管道的优点，深受生产企业、设计部门和使用部门的青睐，呈快速发展的态势。为了及时掌握我国生产、使用PCCP情况，中国水泥制品工业协会于2006年底对15个生产PCCP重点企业做了调查。