数控三工位大型高压瓷套修坯机组的研制

研制出一种适用于等静压干法加工工艺的新型结构数控三工位大型高压瓷套修坯机组。机组的三台加工设备采用星形排列,上坯机设在机组中心,实现各个加工机床间坯件的换位和定位。电气控制系统采用编程控制器(PLC),实现手动和自动控制。实践证明,该机组的噪音为71dB,粉尘泄漏量为33.1m g/m 2,实际产量为每天两班生产11根坯件,达到了设计要求。     

静压管桩挤土效应对周边建筑物的影响与对策

分析介绍了挤土效应机理,针对静压预制管桩施工的挤土效应对周边建筑物的影响进行了理论分析,结合施工中的实际情况,提出了部分施工中有效减少该部分影响的措施,从而达到有效控制静压管桩基础对周边建筑物的影响。     

江海长石在等静压棒型产品中的应用试验

抚顺江海钾长石原料具有钾高钠低的特性,应用该长石原料在等静压坯料配方中,可以提高大型产品的高温荷重性能,拓宽长石原料的供应局面.分析了江海长石的化学物理性能,并将江海长石原料添加在等静压坯料中进行试验,实验结果表明,江海长石原料可以在等静压坯料配方中应用,同时注意使用比例、烧成制度的调整及优化.     

纳米晶块体Co-45Ni-10Cr合金在H2SO4溶液中腐蚀电化学行为研究

利用粉末冶金工艺制备常规尺寸（CS）Co-45Ni-10Cr合金粉末,再利用机械合金化法制备纳米尺寸（NS）Co-45Ni-10Cr合金粉末,采用真空热压技术得到相应的块体Co-45Ni-10Cr合金。腐蚀介质选择不同浓度的H2SO4溶液,利用电化学工作站分别测试两种Co-45Ni-10Cr（CS和NS）块体合金的自腐蚀电位、动电位极化曲线和交流阻抗谱,对比研究了它们的腐蚀行为以及晶粒细化对于它们腐蚀行为产生的影响。结果表明：两种Co-45Ni-10Cr（CS和NS）块体合金的自腐蚀电位均随腐蚀介质H2SO4溶液浓度增大而发生负移,腐蚀倾向逐渐加剧,同时腐蚀电流密度均增大,电荷传递电阻相应减小,因此腐蚀速度加快。此外,两种Co-45Ni-10Cr（CS和NS）块体合金的交流阻抗谱均为单一容抗弧,说明腐蚀速率均由电化学过程控制。与Co-45Ni-10Cr（CS）合金相比,Co-45Ni-10Cr（NS）合金的腐蚀速率减慢,这表明纳米化后Co-45Ni-10Cr块体合金的耐腐蚀性能有所提高。     

基于FPA的气动柔性手指康复器及其控制系统

针对现有手指康复器在柔顺性、适用性和安全性方面存在的不足,基于气动柔性驱动器（FPA）设计了一种气动柔性手指康复器,以采用压缩气体驱动并以橡胶材料为主体设计的基于FPA的柔性弯曲关节代替传统的纯机械式结构。根据手指康复器仿生康复的任务要求,设计具有三大模块的控制系统：模式识别模块负责通过采集和分析手指表面肌电信号(sEMG)对主体的动作意图进行识别,并生成康复运动训练方案;角度反馈模块采用AS5045芯片实时检测康复器运动状态并将数据信息反馈至主控制器;主控制模块控制上述训练方案和康复器运动状态实时反馈信号以驱动康复器完成运动训练。实验结果表明,康复器两个关节弯曲期望值为15°和30°时的稳态误差小于0.6°,提出的控制系统能很好地完成sEMG的识别、康复器运动信息检测与反馈和康复训练任务,证明了手指康复器及其控制系统是可行的、有效的。     

柘林水库泄水放空洞台车式启闭机行走装置改造设计

分析柘林水库泄水放空洞台车式启闭机手动行走装置运行中存在的问题,提出改造设计思路,并进行主要参数计算和设备选型.     

Opinion: On the Way towards the New Paradigm of Atherosclerosis

Atherosclerosis is a multicausal disease characterized by the formation of cholesterol-containing plaque in the pronounced intima nearest to the heart’s elastic-type arteries that have high levels of blood circulation. Plaques are formed due to arterial pressure-induced damage to the endothelium in areas of turbulent blood flow. It is found in the majority of the Western population, including young people. This denies the monogenic mechanism of atherogenesis. In 1988, Orekhov et al. and Kawai et al. discovered that the presence of atherogenic (modified, including oxidized ones) LDLs is necessary for atherogenesis. On the basis of our discovery, suggesting that the overloading of enterocytes with lipids could lead to the formation of modified LDLs, we proposed a new hypothesis explaining the main factors of atherogenesis. Indeed, when endothelial cells are damaged and then pass through the G2 phase of their cell cycle they secrete proteins into their basement membrane. This leads to thickening of the basement membrane and increases its affinity to LDL especially for modified ones. When the enterocyte transcytosis pathway is overloaded with fat, very large chylomicrons are formed, which have few sialic acids, circulate in the blood for a long time, undergo oxidation, and can induce the production of autoantibodies. It is the sialic acids that shield the short forks of the polysaccharide chains to which autoantibodies are produced. Here, these data are evaluated from the point of view of our new model.     

刮板输送机便携式工况测试仪的研究

介绍了便携式刮板输送机工况测试仪的主要研究内容,简要说明了其设计思路、工作原理以及在国家级煤矿掘进机械质量监督检测中心的电机试验台上和便携式刮板输送机工况测试仪进行的对比试验情况。     

惰性气体氙β-γ符合测量系统进样装置的研制及应用

介绍了一套用于惰性气体氙β-γ符合系统的进样装置。该装置较好地解决了惰性气体氙β-γ符合系统在进样方面存在的问题,使系统具备了四种氙取样设备归档样品的测试能力,同时还可以进行归档瓶体积和压力的测量,扩展了系统的功能,使系统具备了独立完成氙归档样品现有分析项目的能力。利用该装置准确标定了系统中气相色谱的标准曲线,通过与Agilent6890气相色谱进行测量比对,二者在3%内符合,检验了所标定的标准曲线的准确性。     

Microstructural Evolution of Creep-Induced Cavities and Casting Porosities for a Damaged Ni-based Superalloy Under Various Hot Isostatic Pressing Conditions

The microstructural evolution of casting porosities and creep-induced cavities for a damaged nickel-based superalloy under different hot isostatic pressing(HIP) conditions was investigated in order to understand the effects of HIP parameters on the healing behavior of micropores. A number of small-sized creep cavities formed during long-term service and large-sized porosities formed during the casting process were observed. These microdefects were partially healed after treated at high temperature of 1100 °C combined with 150 MPa pressure for 2 h, together with the formation of the socalled concentrically oriented c0 rafting structure. When HIP temperature was increased to 1150 and 1175 °C, both the amount and the size of the microdefects were decreased. The concentrically oriented c0 rafting around creep cavities became more remarkable, and the primary c0 denuded zone was also formed between the raft structure and the cavity.Energy-dispersive X-ray spectroscopy analysis revealed that the c matrix solute atoms diffused toward the cavity under the concentration gradient, whereas the c0-forming elements diffused in a negative direction. When increasing HIP temperature up to 1200 °C, the micropores were hardly observed, indicating that both casting porosities and creep-induced cavities had almost been healed. Meanwhile, the c0 rafting structure disappeared since HIP temperature was beyond the c0 solvus temperature. It is revealed by the experimental results that the atomic diffusion could mainly dominate the healing process of micropores.