基于短信传输方式的无线工业模块设计

介绍了美国德州仪器(TI)公司的16位超低功耗单片机MSP430F135和Siemens公司TC35系列的MC37i。详细介绍了各个部分电路组成和原理。设计并实现了一种基于短信传输方式的无线工业模块。     

镇泾油田HH37P1水平井钻完井技术

为评价水平井开发镇泾油田长8油藏的经济技术可行性,部署了HH37P1水平井。分析了该井的施工难点,提出了相应的技术对策。现场施工中通过优化钻具组合、控制井眼轨迹、调节钻井液性能及配合相应的工程工艺技术,使HH37P1水平井顺利完钻。通过测井资料结合录井显示,采用预置管柱完井方式配合后期压裂改造,初见成效。HH37P1井的成功实施为有效开发镇泾油田提供了新的途径。     

叶根倒角对跨音轴流压气机气动性能的影响*

为了获得叶根倒角对跨音轴流压气机气动特性影响规律,研究充分考虑了加工工艺及气动影响两方面,用倒角半径及最小角度两个参数确定倒角几何。研究基于Rotor37分析倒角参数对叶片几何的影响,并从整体性能及内部流场细节两方面对转子气动特性变化进行详细分析,获得了倒角参数变化对气动性能的影响规律。研究结果表明,相对于最小角度,倒角半径是影响转子性能的主要因素;倒角的存在不仅使得叶片根部马蹄涡的分布发生改变,且影响了出口通道涡的强度和尺度。此外倒角存在改变了叶根处的压力分布,使得前缘来流附面层有所增厚,导致根部的做功能力及转子性能下降。     

General decay of solution for a transmission problem in infinite memory-type thermoelasticity with second sound

In this article, we study the initial boundary value problem in one space variable for an elastic–thermoelastic bar with the elastic part being surrounded by two thermoelastic parts in the presence of an infinite memory term, for which the heat conduction in thermoelasticity is described by Cattaneo’s law, removing the physical paradox of infinite propagation speed of signals. The main di?culties in handing this problem are that the system does not have any frictional damping term, and that the dissipative effects of heat conduction induced by Cattaneo’s law are usually weaker than those induced by Fourier’s law. To overcome these di?culties, we shall introduce the second-order energy and two extra functionals. Under appropriate hypothesis on the relaxation function, we establish a general decay result.     

高品质37Mn5油井管坯钢的研制开发

莱钢采用UHP电炉冶炼-LF精炼-连铸-热送-轧制短流程工艺路线开发生产J55级37Mn5油井管坯钢,采取了精料、精炼强化脱氧、连铸保护浇注等工艺措施,使生产出的产品成分均匀、残余元素含量低、氧含量低、夹杂物少、晶粒细小,满足了石油工业对高质量油井管的要求。     

风力发电机组状态监测系统中通信处理设计

设计分布式风力发电机组状态监测系统中的GPRS通信模块,嵌入式处理器核心采用EM9000开发平台,GPRS通信模块采用ETA302,该模块内置MC37i,可以与嵌入式系统对接。对系统软硬件、GPRS通信程序等进行设计与调试。通过该系统的设计,为分布式风力发电机组状态监测系统中需要的无线数据传输提供了技术支持。     

基于SP37和MSP430的汽车轮胎压力监测系统设计

为了保障汽车行车安全,重点研究了胎压监测系统,分析了该系统的主要架构和工作原理,并提出了一种新型胎压监测系统设计方案。该系统的发射模块采用了高集成度的SP37芯片,用于实现胎压数据的采集与发送;接收模块采用了MAX1473芯片,用于实现无线数据的接收;数据处理模块采用MSP430芯片。该系统能够实时显示各个轮胎的测量数据,并对危险情况进行报警。重点介绍了该胎压监测系统的硬件设计和软件流程,并分别在室内环境和真实的汽车环境中测试了该系统的性能。最终实验表明,该系统能够准确、稳定地用于汽车胎压监测。     

基于SP37的汽车胎压监测系统研究与设计

针对目前市场上汽车胎压监测系统的胎压传感器、微控制器、无线射频发射器分开设计所造成系统测量模块体积过大、安装繁琐、使用期限短、故障率高等问题,基于英飞凌公司设计研发的SP37传感器,在缩小系统测量模块体积、控制产品制造成本的同时提高了测量的精确度、可靠度以及稳定性。系统可以实时显示胎压数据,而且对行驶过程中的危险征兆及时预警。在汽车实地测量胎压试验中,系统表现稳定,达到预期目的。实验数据表明,设计具有稳定性好、测量精度高、系统功耗低等优点。     

内充气正比计数管测量37Ar活度中壁效应的理论研究

通过分析³⁷Ar衰变产生的X射线和俄歇电子在内充气正比计数管灵敏体积中的逃逸及计数管在³⁷Ar活度测量中的壁效应,得出X射线在正比计数管中的逃逸是产生壁效应的主要原因,提出了压力指数外推方法。使用MCNP模拟X射线和俄歇电子在内充气正比计数管中的输运,模拟结果与理论分析结论一致。比较模拟得出的壁效应值与实验测量的壁效应值可知,实验给出的壁效应值是可信的。本工作的研究结果为37Ar测量方法提供了理论支持。     

GPR37 Receptors and Megalencephalic Leukoencephalopathy with Subcortical Cysts

Megalencephalic leukoencephalopathy with subcortical cysts (MLC) is a rare type of vacuolating leukodystrophy (white matter disorder), which is mainly caused by defects in MLC1 or glial cell adhesion molecule (GlialCAM) proteins. In addition, autoantibodies to GlialCAM are involved in the pathology of multiple sclerosis. MLC1 and GLIALCAM genes encode for membrane proteins of unknown function, which has been linked to the regulation of different ion channels and transporters, such as the chloride channel VRAC (volume regulated anion channel), ClC-2 (chloride channel 2), and connexin 43 or the Na⁺/K⁺-ATPase pump. However, the mechanisms by which MLC proteins regulate these ion channels and transporters, as well as the exact function of MLC proteins remain obscure. It has been suggested that MLC proteins might regulate signalling pathways, but the mechanisms involved are, at present, unknown. With the aim of answering these questions, we have recently described the brain GlialCAM interactome. Within the identified proteins, we could validate the interaction with several G protein-coupled receptors (GPCRs), including the orphan GPRC5B and the proposed prosaposin receptors GPR37L1 and GPR37. In this review, we summarize new aspects of the pathophysiology of MLC disease and key aspects of the interaction between GPR37 receptors and MLC proteins.