奇—奇核~（114）Pm高自旋同质异能态及其衰变纲图的研究

用高自旋同质异能态次级束流线实验装置，对１４４Ｐｍ的高自旋同质异能态进行了快速分离，并做了γ射线的符合测量．结合γ射线激发函数和各向异性的测量结果，首次建立了奇—奇核１４４Ｐｍ的高自旋同质异能态的衰变纲图，其中１９条高自旋能级和２９条γ射线是由本工作指定的．离子γ射线关联测量确定了１４４Ｐｍ的高自旋同质异能态的半衰期大于２μｓ．通过系统性比较以及变形的独立粒子模型理论计算，指定了高自旋同质异能态的粒子组态可能为，自旋宇称为，并具有形变参数为β＝－０．１８的扁椭球形状．中国科学院归国留学人员择优支持基金,国家教委留学回国人员科研资

高自旋同质异能态束流及其在核谱学中的应用

介绍了在日本理化学研究所利用高自旋同质异能态束流装置上取得的核谱学研究结果。强调了可利用重离子核反应中逆运动学产生高自旋同质界能态束流，并用其进行二次核反应，描述了首次利用高自旋同质异能态束流完成的物理实验．The study of nuclear spectroscopy by using the High spin isomer Beam(HSIB)facility in RIKEN was introduced.The production of HSIB based on the inverse kinematics in heavy ion nuclear reaction,and its application for secondary nuclear reaction were stressed The first experimental result by using HSIB was also briefly discribed.中科院归国留学人员择优支持基金,国家教委留学回国人员科研资

A M ethod of L earn ing & Tun ing fo r a Fuzzy P redict ive Con t ro ller

中文摘要：提出由模糊预测器和模糊预测控制器组成的一种自适应模糊预测控制系统的设计方法, 该方法以模糊规则适用度为评判标准考虑规则的合理添加, 采用BP 算法在线调整规则的参数, 并删 减相互矛盾的规则. 仿真实验表明, 优化后的控制系统在停止训练的情况下, 对于具有纯时延的非线性 被控过程仍有良好的控制性能. 英文摘要：　A m ethod of design ing an adap t ive fuzzy p redict ive con t ro l system is p ro2 po sed. The con t ro l system includes a fuzzy p redicto r and a fuzzy p redict ive con t ro ller, w h ich are t rained by BP algo rithm , added new fuzzy ru les acco rding to the f iring level of each of the ru les ( in the ru le base) , and reduced the con t rary ru les to m eet the comp leteness of fuzzy ru les. The con t ro l system has st ill the good perfo rm ance fo r non linear p lan t w ith dead t im e even af ter the t rain ing is stopped.福建省自然科学基金资助项目(F97002) 和智能技术与系统国家重点实验室资 助项目(无项目号

research on improvement of parallel middleware for sql on beowulf cluster

中国计算机学

Study of the νi13/2－1 band in 189Pt

High-spin levels of 189Pt have been studied with the in-beam γ-spectroscopy method via the 176Yb(18O,5n) reaction at the beam energies of 88 and 95 MeV. The previously known νi-131/2 band has been confirmed, and its unfavored signature branch extended up to the 13/2+ state. Within the framework of the triaxial particle-rotor model, the νi-113/2 band is suggested to be associated with the 11/2[615] configuration, and to have triaxial deformation

Electric-dipole transitions in 165Er

High-spin states of 165Er were studied using the 160Gd(9Be, 4n)reaction at beam energies of 42 and 45 MeV. The previously known bands based on the ν5/2-[523] and ν5/2+[642] configurations have been extended to high-spin states. Electric-dipole transitions linking these two opposite parity bands were observed. Relatively large B(E1) values have been extracted experimentally and were attributed to octupole softness

Properties of the rotational bands in the transitional nucleus 189Pt

High-spin states in 189Pt have been studied experimentally using the 176Yb(18O,5n) reaction at beam energies of 88 and 95 MeV. The level scheme of189Pt has been revised significantly and extended to high-spin states.Rotational bands have been analyzed in the framework of triaxial particle-rotor model, and a γ ≈−30◦triaxial shape and a near-prolate shape have been proposed to the νi−113/2 and νf5/2(p3/2) bands, respectively. Two ΔI = 2 transition sequences with similar energies have been observed, and they have been proposed to be associated with the νi−213/2νf5/2(p3/2) configuration. The structure built on the νi−213/2νf5/2(p3/2) configuration could be interpreted theoretical calculations of the triaxial particle-rotor model if a near-oblate shape is assumed

基于机群架构的并行数据库中间件系统改进研究

基于机群架构的高性能计算机已经被应用到很多领域,如大气预测、油藏模拟、CFD仿真模拟和Web服务等.随着数据量的爆炸式增长,传统的集中式的数据库系统已经难以满足各种应用的需求,基于机群式架构的并行数据库系统为增强海量数据的存储以及处理能力提供了一种途径.对以前实现的一个基于机群架构的并行数据库中间件系统ParaMidSQL进行了改进.通过对并行选择、并行排序、并行连接等关键操作的测试,给出对并行数据库中间件系统改进后的性能分析.中国计算机学

Electric-dipole transitions in 165Er

High-spin states of 165Er were studied using the 160Gd(9Be, 4n)reaction at beam energies of 42 and 45 MeV. The previously known bands based on the ν5/2-[523] and ν5/2+[642] configurations have been extended to high-spin states. Electric-dipole transitions linking these two opposite parity bands were observed. Relatively large B(E1) values have been extracted experimentally and were attributed to octupole softness