The AC losses measurement and analysis of superconducting NbTi CICC for HT-TU superconducting Tokamak

Superconducting TF and PF coils have been measured in SULTAN test facility. Segregated copper strands are included in four NbTi CICC and this is a technical innovation. Two AC losses measurement methods, calorimetric and electromagnetic methods, have been used in the experiments, and a broad frequency range (from 0.05 Hz to 6 Hz) is covered in sample test. The purpose of this experiment was to investigate AC losses of TF and PF CICC conductor including segregated copper and to check the design of PF and TF CICC coated with different resistive barriers (Pb-30Sn-2Sb and Ni plating on NbTi strands).     

现代高层建筑全自动控制系统中水位检测、水质监测模糊控制系统开发

文章介绍了现代高层建筑全自动控制系统中，利用主控计算机对检测到的水位信号，监测到的水质信号进行模糊化处理。并通过单片机带动执行机构进行水位调整，以获得节水、节电、节能及保证水质的良好效果。     

Dielectric breakdown of a residual SF6 plasma at 3000 Kunder diatomic equilibrium

A residual plasma at 3000 K and under diatomic equilibrium is left inside an axially blown gas blast SF₆ circuit breaker after the thermal extinction of an arc. The breakdown of such a residual plasma depends on the electron generation and loss mechanisms. Altogether six ionization and chemical reactions relevant to the time scale of breakdown have been taken into account. It has been found that the critical field strength for breakdown is proportional to the pressure and is equal to 2.0 V/(m.Pa). This field strength is in agreement with the experimental results     

C上全纯自映射的完全不变域

设ｆ（ｚ）是Ｃ上全纯自映射，０和是它的本性奇点，其中本文讨论ｆ（ｚ）的完全不变域的性质，证明了如果Ｄ是ｆ（ｚ）的完全不变域，那么Ｄ一定是二连通的且Ｄ包含了的奇异值集；此外，如果ｆ（ｚ）是有限型的，则Ｄ＝Ｆ（ｆ）．由此结论可以推出ｆ（ｚ）最多只有一个完全不变域在Ｆ（ｆ）中     

管理科学的人本分析——软管理科学的探析

本文分析了管理科学的人本化倾向，结合现代人文学科的发展探讨了管理科学在科学管理理论的基础上不断向以人为目的的管理方向发展的趋势，论述了现代管理思想在企业行为中的重要意义。     

SYSNTHESIS AND CHARACTERIZATION OF A NEW COMPOUND K_6Ti_2Nb_(14)O_(42)IN K_2O-TiO_2-Nb_2O_5SYSTEM

A new compound K_6Ti_2Nb_(14)O_(42)was found inthe ternary system K_2O-TiO_2-Nb_2O_5.The compound was char-acterized and investigated by electron,probe,X-ray powderdiffraction and differential thermal analysis.The transpar-ent crystal of light yellow color in form of hexagon-thinplate can be grown by flux method.Further,its crystal struc-ture was determined by four-circle diffratometer K_6Ti_2Nb_(14)O_(42)crystallizes in he(?)(?)(?)onal system with unitcell parameters a=9.1106(5)×10~(-10)m·c=12.0136(9)×10~(-10)m,Z=l andspace.group P6_3/mcm(193).     

安装卸载程序技术要点简述

简要论述构造安装卸载程序的技术难点及其解决办法,并给出可行的软件实现方法.     

Analysis,simulation and verification of a bipolar current source power resonant inverter

A high‐frequency bipolar current source resonant inverter introduced in this paper has dramatic zero‐voltage‐switching (ZVS) characteristic. The analytic expressions of the resonant voltage and current are given. It indicates that the resonant waveform is composed of two parts, i.e. the oscillatory component and the stationary component. In special cases, the resonant waveform degenerates into the mono‐frequency component, as presents the graceful sinusoidal wave with very low total harmonic distortion (THD) value. Based on the closed‐form voltage and current, the component stresses on reactive elements are obtained. The impact of different component values and operating frequencies on ZVS feature is also discussed. It should be noted that the ZVS merit may be lost if the components are carelessly selected. The validity of the theoretical analysis has been proven with Pspice simulations and experimental results. Copyright © 2004 John Wiley Sons, Ltd.     

基于参考轨迹的自适应模糊Smith控制器

本文提出一种基于参考轨迹的自适应模糊Smith控制器,其模糊决策依据系统响应的参考轨迹,实现对Smith控制器参数的自整定.研究表明,该系统有较高的稳态精度和较强的鲁棒性.     

Bone Formation Process of β-TCP Ceramics with Tetracycline Tracing

To study the new bone formation in the bone defect area after implantation, the tetracycline tracing method was used. The results show that new bone formed in 1 month, and the formation rate of new bone was very high (8. 164 μm/day), considerably faster than that of control groups (3.219 μm/day). The new bone grew up quickly and β_TCP particles were surrounded by double fluorescence bands which became more obvious. The new bone formation rate was maximal at 2 months, and then gradually reduced. The rate was steady at 4 months, and then reduced to resembling as the normal physiologic metabolism of bone, which indicated the implanted materials were completely replaced by bone. Calcium phosphate materials had the ability of osteoconduction.