高层楼宇电子智能系统的研究与设计

提出了目前高层建筑电子智能系统所存在的诸多问题,对高层楼宇电子智能系统标准化体系的总体设计进行了初步构思,提出了系统标准化体系设计的4个目的、系统研发工作的2个重要方面以及标准化体系的功能特点,并对高层楼宇电子智能系统标准化体系的总体方案进行设计,建立了具有10个分系统的标准化高层楼宇电子智能系统.     

倾斜RnA-模及其导出的挠理论

本文通过函子Ｔ＝－ＡＲｎＡ讨论了倾斜Ａ 模与倾斜ＲｎＡ 模的重要联系，推广了［１］的主要结果；讨论了倾斜ＲｎＡ 模ＴＸ与倾斜Ａ 模导出的挠理论在相同性和分裂性等方面的关系．     

Multiplicity Free Actions of Quantum Groups and Generalized Howe Duality

Noncommutative associative algebras are constructed which have the structure of module algebras over tensor products of pairs of quantized universal enveloping algebras. These module algebras decompose into multiplicity free direct sums of irreducible modules, yielding quantum analogues of generalized Howe dualities.     

Translation invariant topologies on commutative *-algebras

Let A be a commutative *-algebra. Under certain conditions on the involution, we construct a topology makingA a HausdorffQ-ring with continuous involution and inversion; this topology is induced by anA-valued norm.Applying the previous considerations to the algebraC(X) of continuous complex-valued functions over a topological spaceX, we obtain a new characterization of Weierstrass spaces.Furthermore, we provide every projective finitely generated moduleM over a topological ring R with a unique topology, under whichM is a topologicalR-module and every R-linear mapf :M N is continuous, for any topologicalR-moduleN. In caseR =A, we prove that this topology is induced by anA-norm. Mathematics subject classification numbers, 1980/85. Primary 46K05, Secondary 16A80.     

Asymptotic behaviour of certain sets of prime ideals

Let be ideals of the commutative ring , let be a Noetherian -module and let be a submodule of ; also let be an Artinian -module and let be a submodule of . It is shown that, whenever is a sequence of -tuples of non-negative integers which is non-decreasing in the sense that for all and all , then Ass is independent of for all large , and also Att is independent of for all large . These results are proved without any regularity conditions on the ideals , and so (a special case of) the first answers in the affirmative a question raised by S. McAdam.

     

基于Matlab与Optisystem的OFMD信号的产生以及在光纤通信系统中的传输过程的仿真

正交频分复用(OFDM)实际上是一种多载波调制技术(MCM)[1]。文章中使用的软件Optisystem则是由Optiwave system公司开发的一款光通信系统软件。它集成了设计,测试,优化光纤通信系统的功能。在本次仿真过程中,OFDM信号是由Matlab程序实现的,而信号在光纤链路中的传输则由Optisystem来完成。文章详述了OFDM信号产生,传输的原理,仿真设置过程。并对其性能指标进行了分析。     

基于LabVIEW的自动控制原理虚拟实验系统

根据"自动控制原理"课程实验教学在高校实验实践中遇到的困难和实验教学改革的需要,本文提出了建立基于LabVIEW的自动控制虚拟实验系统方案.文中分析了目前常见的虚拟实验系统的优缺点,相应的应用LabVIEW编程语言实现了包含"自动控制原理"课程常见实验的虚拟实验系统,并提出了进行硬件实验扩充的设想.最后,利用Matlab语言编程进行对比分析,进行正确性验证.     

Immobilization ofLactobacillus bulgaricus in a hollowfiber bioreactor for production of lactic acid from acid whey permeate

Lactobacillus bulgaricus was immobilized in the shell side of an industrial hollow-fiber ultrafiltration module. Acid whey permeate, containing 46 g/L lactose supplemented with 10 g/L yeast extract, was pumped through the tube side at dilution rates of 0.2–2.5/h. At a cell concentration of 100 g/L, productivity was 1.5–5 g lactic acid/L/h.