非均匀阳极电流电解槽内型数值模拟及均化研究

本文以数值模拟和测试相结合的手段在国内首次研究阳极电流分布不均匀性对槽膛内型的影响,并通过现场实测数据分析阳极电流不均匀的原因,在此基础上提出了提高阳极电流分布均匀性的措施。     

匠心汇聚书“五缘”——记中国闽台缘博物馆室内外环境设计

该文通过以中国闽台缘博物馆室内外环境设计为例,探讨设计如何表现闽台两岸建筑特色,传达"五缘"文化诉求,在运用现代技术材料、营造现代空间、满足现代功能的同时恰当合理地融入地域建筑文化。     

一种新颖的不对称半桥式准谐振变换器

提出了一种新颖的不对称半桥式准谐振变换器,利用次级添加电容与变压器漏抗谐振的方法实现零电流开关,并详细讨论了软开关的条件.仿真和实验证明,该变换器具有软开关范围大、效率高的特点,验证了该方案的可行性和有效性.     

一种新型三轴电容式加速度计的设计分析

设计了一种新型结构的体硅工艺梳齿电容式加速度计,该设计采用2个检测质量块,分别检测水平方向和垂直方向的加速度。x,y水平方向不对称梳齿的设计,消除了z轴对水平轴向加速度的干扰,同时z轴支撑梁的设计,解决了水平轴向对z轴的干扰。电容的差分结构有利于提高加速度计的检测性能。用Ansys仿真软件对敏感结构进行静态和模态分析,理论上验证了所提出的三轴电容式加速度计整体结构的可行性。     

铝电解电容器测试分选机的设计方案

JHT-LD-380型高精度电容器全自动测试分选机是铝电解电容器生产专用设备。该机选用了ST-280型电解电容器测试电桥,该电桥集极性、漏电流、电容量、损耗各参数的测试及通过I/O接口对外部电路进行控制于一体,性能优异。电桥与外围电路配合良好。在测试电桥、充电片、测试头等关键点的设计上独具匠心。该机具有自动分选、操作简便、测试准确、速度快等优点,在测试精度、速度、分选准确度等方面均达到国外同类机的水平。1998年评为国家级新产品。     

激光星际链路分析研究

作为星际光链路的空间激光通信可建立全天候、高机动性、高灵活性、高可靠信息平台.德国空间固体激光通信由两个光通信终端及各自的实验平台组成,可模拟卫星的相对运动和抖动.其一个终端采用1064nm YAG激光器,以650mbps码率传输数据.另一终端采用810nm半导体激光器,通信速率是10mbps.     

基于TMS320LF2407的不对称负载下的位置同步控制

研究了负载不对称情况下基于DSP控制器TMS320LF2407的同步控制方法,并通过搭建的实验平台实现了刚性连接下两个驱动轴的并行控制。同时对采集到的数据进行了分析,结果表明并行控制方式在多电机拖动系统的同步控制中是可行的,并在积分分离式PID控制算法作用下取得了较好的控制效果。     

Permissible Minimum Thickness in Asymmetrical Cold Rolling

The minimum rolling thickness in asymmetrical rolling was analyzed compared with that in symmetrical rolling. The differential equilibrium equations on forces were established to calculate the asymmetrical rolling force equation by slab method. An implicit expression of the minimum rolling thickness was then derived from the rolling force equation and Hitchcock equation. The results show that permissible minimum rolling thickness of asymmetrical rolling only exists within a specific range of cross-shear ratio, which is termed the cross-shear zone proportion of the whole deformation zone. Numerical computation was carried out to obtain a discrete solution of the minimum rolling thickness. Experiments were designed to investigate the influence factors on cross-shear ratio. Finally, experimental results prove the correctness of the improved formula given.     

Tools for consistency management between design products

Consistency between different design documents is most important, as these documents are usually elaborated by different persons. Consistency means that structures within different documents “match” each other and also the values of corresponding attributes. Interactive and incremental tools for building up and maintaining consistency - so-called integrators - install fine-grained relations (semantic links) between objects of these documents. Such integrators have been investigated for some time in different application domains (Nagl, 1996).This paper deals with two extensions of integrators ( [K?rtgen, 2009a] and [K?rtgen, 2009b]). Both are devoted to speed up the (re-)integration process. The first extension makes use of the still valuable information of links damaged due to changes of documents. The second reuses consistent documents of past projects, to find out big and suitable related parts of design documents or of corresponding underlying knowledge. This paper is written for a chemical engineer and, therefore, emphasizes the tool functionality side.