Electroplated hard magnetic material and its application in microelectromechanical systems

We describe the preparation of CoNiMnP-based permanent-magnet material using several sulfate and chloride solutions. We studied eight samples, and all the samples show vertical magnetic anisotropy. Sample8, which was electroplated from a low-concentration chloride solution and under external magnetic field, demonstrates the best magnetic properties with coercivity 2632 Oe, remanence 0.20 T, and maximum magnetic energy 10.185 kJ/m/sup 3/. An array structure can avoid the stress between the electroplated layer and the seed layer. The electroplated Co/sub 0.8/Ni/sub 0.1174/Mn/sub 0.0062/P/sub 0.0762/ permanent magnet has potential for bidirectional actuators in micro-electromechanical systems.     

建立液压系统信息模型的研究

所设计的液压系统信息模型将液压系统分作系统、元件和油口3个层次，以多层链表的方式将其连接起来，能简单地与液压系统一一对应。而使用液压系统信息模型的整个仿真系统也分为3层，以信息模型为核心，向上层映射为数学模型，向下层映射到数据库。研究结果表明：所采用的体系结构弹性足，构造灵活，不但能满足液压仿真的需要，而且对系统的扩展性、对多方应用间信息集成都有着良好的支持。     

构建学习型组织与推动企业信息化

分析构建学习型组织与推动企业信息化的关系,提出企业通过构建学习型组织以推动企业信息化的措施。     

英语测试改革初探--英语测试中增加口试的改革实践

从理想的英语测试体系及英语测试现状谈英语测试改革的必要性,从我校英语测试改革实践及成效论在英语测试中增加口试的可行性.     

高性能混凝土配合比设计的试验研究

从对HPC组成、结构的认识出发，借鉴利用拨开系数求砂率的方法，提出了一种新的HPC配制方法，并通过试验证实该方法是完全可行的．     

Wear behavior of graphite studies in an air-conditioned environment

The wear performance of graphite used in the high-temperature gas-cooled reactor (HTR-10) was researched. The wear mechanism, worn surface and wear debris were analyzed under SEM. Under test conditions, the wear rate was 2.27×10⁻⁷ g/m for surface contact, and 1×10⁻⁶ g/m level for line contact. The main wear mechanisms of graphite were groove and fatigue. The projected area of wear debris followed the logarithm normal school, giving most wear debris as a small sphere and large flake debris as only a small part.     

Rare earth elements in CO_2-fluid inclusions in mantle Iherzolite

Trace elements including REE (Rare Earth Elements) in fluid inclusions in Iherzolite, olivine, orthopyroxene, and clinopyroxene have been determined by heating-decrepitation and ICP-MS (Element Type Inductively Coupled Plasma-Mass Spectrometry) method. Normalized CO2 fluid/chondrite data show that mantle fluids are rich in REEs, especially LREEs (Light Rare Earth Elements), several times or dozen times higher than mantle rocks and mantle minerals. There are close relationships among the REE data of olivine, orthopyroxene, clinopyroxene and 1herzolite. Compared to the data of chemical dissolution method, it is believed that REE data obtained from heating-decrepitation and ICP-MS technique are contributed by CO2 fluid inclusions. About 60% (mass fraction) of tiny inclusions are observed not to be decrepitated above 1000℃, so REE data obtained are only contributed by decrepitated inclusions. Mantle fluids rich in LREE play an important role in mantle metasomatism, partial melting and mineralization.