三个电耦合神经元系统同步分析和模拟

研究了三个线形和环形耦合HR神经元网络模型的同步行为.通过构造合适的Lyapunov函数和LMI方法,获得线性化偏差系统零解的全局渐近稳定性和全局指数稳定性,给出实现同步的相关判据.进一步地,环形耦合网络比线形耦合网络更容易同步.数值结果显示了我们结果的有效性.     

钨合金-HR2钢连接界面特性

采用镍作为中间过渡层,通过热等静压(HIP)方法实现了W-Fe-Ni合金与HR2钢的扩散连接.采用拉伸试验测试了连接件的力学性能,采用金相显微镜(OM)、扫描电镜(SEM)、能谱(EDS)分析了连接试样界面的显微形貌及元素扩散行为.结果表明,在1200~1300℃,130 MPa,保温保压1 h的条件下,可以实现W-Fe-Ni合金与HR2钢的有效连接.拉伸试验中,当载荷达到650 MPa时,基体材料发生断裂,连接界面仍保持完好.结果表明,W-Fe-Ni合金与HR2钢结合紧密,连接界面无裂纹存在.母材与过渡层之间发生了充分的互扩散,W,Co,Cr,Mn等元素都扩散到对方母材基体中,镍表现出更易于向W-Fe-Ni合金一侧扩散的特性.连接界面实现了良好的冶金结合.     

铍／HR—1不锈钢热等静压扩散连接界面特性研究

采用热等静压（HIP）方法，对铍与HR－1不锈钢（SS）在加Cu单层或Cu/Ni双层过渡材料的条件下进行扩散连接。利用金相显微镜，扫描电镜（SEM）、俄歇电子能谱（AES）、显微力学探针（MPM）及拉伸试验分析了接头扩散区的显微组织，微区成分和力学性能。探讨了扩散区成分，组织，硬度及弹性模量分布的关系。研究表明，加Cu单层过渡材料能有效阻挡Fe向铍端的扩散，但不能阻挡铍向不锈钢端的扩散和消除合金元素Ni向Be/Fe及Be/Cu的偏聚，存在幅度较大的弹性模量跃变，造成应力集中和开裂。加Cu/Ni双层过渡材料能实现Be,Cu,Ni与不锈钢间的互扩散，其结合强度为50MPa，是实现铍与不锈钢扩散连接和提高接头质量的可选方法。     

河湖幸福指数——富民之河评价研究

河流是人类文明的摇篮、社会发展的支撑、人民富足的基础。习近平总书记发出"让黄河成为造福人民的幸福河"的伟大号召。富民之河是幸福河的基本维度,深入理解与科学评价富民之河事关幸福河建设。本文剖析了富民之河的内涵要求,构建了富民之河的指标体系,提出了指标计算方法,并进行了实例评价,可为幸福河建设评价提供技术支撑。     

An Intelligent Household Heart Rate Meter

The measuring instrument which uses Sunplus SPCE061A MCU as the controller is a practical intelligent household heart rate meter.It can serve all people timely and effectively to detect the heart rate.It rings some voice alarm if the HRV is abnormal.Then it is decided whether to see a doctor at a convenient time for further diagnosis.The instrument has a feature of voice guidance that can save keyboard steps,which extends the scope of use.All people,old and young,the blind and the deaf,can use it by themselves.     

Creep-rupture performance of 0.07C–23Cr–45Ni–6W–Ti,Nb austenitic alloy (HR6W) tubes

A series of base metal and cross-weld creep-rupture tests were conducted on the advanced austenitic alloy, HR6W, to evaluate the material for use at advanced ultrasupercritical (A-USC) steam conditions. Creep deformation and rupture were evaluated by traditional methods and data were compared with other studies to evaluate the creep response of the material. Optical and scanning electron microscopy revealed changes in failure mode and precipitation behavior. Thermodynamic predictions of phase stability were conducted and the results were compared with the experimental data. This research confirmed the important role of W and the precipitation of laves phase in the alloy system, but a direct relationship between laves phase content and creep strength was not observed. Furthermore, Cr content was investigated as an additional factor which may be important in the microstructural stability of the alloy which had not been previously considered. Finally, when compared to commercially available stainless steels, this heat of HR6W showed no creep strength advantage for A-USC application.     

低损耗193nm反射膜的设计

分析了影响193nm反射膜性能的因素，结果表明：在空气侧的外膜层中电场强度较大，随着层数向内过渡，电场强度迅速减小；高折射率材料膜层的吸收损耗明显高于低折射率材料膜层的吸收损耗，而且靠近空气侧最外层的高折射率膜层的吸收损耗最大，按由外层向内层过渡的方向，吸收损耗迅速减小，减小的速度与高低折射率材料折射率的比值相关；表面散射损耗与两种材料的折射率比值成正比，但折射率比值减小，欲达到一定的反射率势必要增加膜层数，从而使表面粗糙度增加，并且引入其它的损耗，因此选择折射率差值适当大一些的材料对降低散射损耗是有利的。以分析结果为基础，设计了27层膜堆的193nm反射膜，设计反射率在98%以上。     

Estimation of long-term creep strength in austenitic power plant steels

This paper presents the characteristics of the performance of austenitic steel Super 304H and HR3C used for construction of boilers with supercritical and ultra-supercritical steam parameters. Characteristic microstructure images of the examined steels in the as received condition observed with the scanning electron microscope are shown. The method for strength assessment based on abridged creep tests carried out at a temperature higher than the design one is presented on the example of examined steels. It has been demonstrated that the obtained results do not deviate from the values of creep strength determined in long-term creep tests. The maximum difference is ±?20%, which is in compliance with the acceptable scatter band. The presented methodology can be used for verification of creep strength.     

HR3C钢内压蠕变试验后显微组织与力学性能试验研究

研究了HR3C钢管试样在不同内压蠕变试验时间下显微组织和力学性能的变化,分析了HR3C钢析出相对力学性能的影响.结果表明:内压蠕变试验后,HR3C钢管试样晶内和晶界上均析出弥散分布的NbCrN相,此外M23C6碳化物在晶界形成连续链状分布,并随着试验时间的延长发生聚集和粗化,M23C6碳化物在晶内析出弥散分布的方形颗粒,在孪晶界以长板状析出;弥散分布的NbCrN相和M23C6碳化物以及晶界连续分布的M23 C6碳化物产生弥散强化和晶界强化,导致内压蠕变试验后HR3C钢的强度和硬度均明显增大,随着试验时间的延长,不断聚集的M23C6碳化物弱化了晶界强化效果,使得HR3C钢抗拉强度略有下降;内压蠕变试验后,晶界连续分布的M23C6碳化物导致HR3C钢室温下冲击吸收功和断后伸长率明显减小.     

以信息化为基础的人力资源战略规划

企业的发展与壮大,离不开企业的战略与规划;而企业的长期持续稳定发展,离不开优秀的人力资源和人力资源的有效配置。由此可见,以信息化为基础的人力资源战略规划,是为企业实现战略目标可持续发展保驾护航的支撑点!