制氧机闲置的氪、氙回收设备的恢复利用

将三套全提取空气分离设备的氪氙系统进行组合,实现互联、互替,从而解决了其中一套氪氙系统设备因缺陷而不能生产的问题。     

6-羧基壳聚糖凝胶珠及其吸附尿毒症低分子毒物研究

用NO2将壳聚糖6位羟甲基氧化成羧基,再以戊二醛作交联剂制备了具有较高强度的6羧基壳聚糖凝胶珠。SEM观察确认凝胶珠表面均匀分布许多“沟槽”。凝胶珠对尿毒症低分子毒物尿酸、马尿酸和肌酐的吸附量分别为2.61、1.5和0.81mg/g;几乎不吸附牛血清蛋白、尿素、肌酸。富含低分子毒物的血清经凝胶珠吸附后,其尿酸和马尿酸的含量可接近人体液正常值。     

平面连杆机构的杆组法运动分析及仿真

为避免整体分析法复杂的建模和运算，将平面连杆机构视为由若干个基本杆组依次连接到原动件和机架上而构成。应用矩阵法对常见的基本杆组进行数学建模，在可视化语言Visual Basic6．0环境下建立相应的杆组位移、速度、加速度分析模块，开发了平面连杆机构运动分析的计算机辅助分析与仿真系统，实现了机构运动分析数值计算、机构运动线图自动绘制和机构运动动态仿真等计算机辅助可视化运动分析，并具有较强的通用性。最后以一平面四杆机构为例，介绍了该系统的使用方法。     

Authenticated encryption schemes with message linkages for message flows

Two efficient authenticated encryption schemes with message linkages are proposed. One is a basic scheme, that it has the better performance in comparison with the all previously proposed schemes in terms of the communication and the computation costs. However, it has a property as same as the previously proposed schemes, that the message blocks can be recovered only after the entire signature blocks have been received. Therefore, the basic scheme is applicable to encrypt all-or-nothing flow. Thus, we improve the basic scheme and also propose a generalized scheme, which allows the receiver to recover the partial message blocks before receiving the entire signature blocks. That is, the receiver may perform the receiving and the recovering processes simultaneously. Therefore, the generalized scheme is applicable to message flows. The generalized scheme requires smaller bandwidth and computational time as compared to the previously proposed authenticated encryption schemes with message linkages for message flows.     

异步电动机直接转矩控制的仿真与分析

在研究和分析直接转矩控制原理的基础上,利用图形仿真工具Matlab/simulink完成了直接转矩控制系统的六边形磁链控制方法和近似圆形磁链控制方法的仿真实验。结合直接转矩控制的算法,通过改变控制系统中直接影响电机性能的转矩滞环调节器和磁链滞环调节器的参数,对仿真结果进行了具体分析。验证了直接转矩控制系统方法的可行性和有效性,并且分析了参数的改变对电机运行性能的影响,同时给出了在基速范围内两种控制方法实现平滑切换的仿真结果。     

连杆机构误差分析与综合的研究现状与发展

由于连杆机构本身固有的结构原因及有限的制造精度、不可缺少的运动副间隙及不可避免的构件弹性变形，其输出运动总是存在着误差的。系统查阅了近年来人们关于这种误差的随机特征分析及其综合方法的研究工作，对这些研究工作进行了归纳分类，讨论了各种研究方法的优缺点，给出了作者本人近期的一些研究成果。最后提出了连杆机构误差分析与综合亟待解决的研究课题和发展趋势，并提供了大量有关的参考文献，目的是为人们进一步开展该领域研究提供一些借鉴。     

织机连杆打纬机构的分析

依据织造工艺对打纬运动的要求分析了连杆打纬机构.对连杆机构运动分析认为:四连杆打纬机构的曲柄半径与牵手长度之比是影响筘座运动的重要因素,六连杆打纬机构的后心运动缓慢特性主要由第二个四连杆机构决定.     

Intelligence: Genetics, Genes, and Genomics.

More is known about the genetics of intelligence than about any other trait, behavioral or biological, which is selectively reviewed in this article. Two of the most interesting genetic findings are that heritability of intelligence increases throughout the life span and that the same genes affect diverse cognitive abilities. The most exciting direction for genetic research on intelligence is to harness the power of the Human Genome Project to identify some of the specific genes responsible for the heritability of intelligence. The next research direction will be functional genomics--for example, understanding the brain pathways between genes and intelligence. Deoxyribonucleic acid (DNA) will integrate life sciences research on intelligence; bottom-up molecular biological research will meet top-down psychological research in the brain. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

大电网调度稳态自适应巡航场景架构

电力调度控制中心作为电网运行控制的指挥中枢和“决策大脑”,其自动化和智能化程度亟待提升。在此背景下,文中提出新一代电网调度稳态自适应巡航场景架构,在横向上将感知、评估、决策和控制等功能环节灵活组合和智能联动,在纵向上以任务为导向实现多级调度的协同控制。在介绍新一代电网调控系统场景理念的基础上,设计了大电网调度稳态自适应巡航场景的相关功能模块。原型系统上的试运行验证了设计的合理性。     

Path curvature of a geared seven-bar mechanism

This paper presents a graphical technique to locate the center of curvature of the path traced by a coupler point of a planar, single-degree-of-freedom, geared seven-bar mechanism. Since this is an indeterminate mechanism then the pole for the instantaneous motion of the coupler link; i.e., the point coincident with the instantaneous center of zero velocity for this link, cannot be obtained from the Aronhold–Kennedy theorem. The graphical technique that is presented in the first part of the paper to locate the pole is believed to be an important contribution to the kinematics literature. The paper then focuses on the graphical technique to locate the center of curvature of the path traced by an arbitrary coupler point. The technique begins with replacing the seven-bar mechanism by a constrained five-bar linkage whose links are kinematically equivalent to the second-order properties of motion. Then three kinematic inversions are investigated and a four-bar linkage is obtained from each inversion. The motion of the coupler link of the final four-bar linkage is equivalent up to and including the second-order properties of motion of the coupler of the geared seven-bar. Then the center of curvature of the path traced by an arbitrary coupler point can be obtained from existing techniques, such as the Euler–Savary equation. An analytical method, referred to as the method of kinematic coefficients, is presented as an independent check of the graphical technique.