Recent Progress of HT-7U Superconducting Tokamak

HT-7U is a superconducting tokamak. which is being constructed in Institute of Plasma Physics, Chinese Academy of Sciences. The mission of the HT-7U project is to develop a scientific and engineering basis of the steady state operation of advanced tokamak.The engineering design of the device has been optimized. The R&D program is going on. Short samples of the conductor and a CS model coil were tested. All the TF and PF coils will be manufactured and tested in Institute of Plasma Physics. Therefore, a 600-meter long jacketing line for cable-in-conduit conductors along with two winding machines, a set of VPI equipment and a test facility for the TF and PF coils are ready in ASIPP now. In this paper, the recent progress of the HT-7U is described.     

双高速低噪声运算放大器AD8022

AD8022是ADI公司生产的双重高速低噪声运算放大器，它具有低噪声、低功耗，低失真等特点，可以作为各种数字用户线的接收放大器。文中介绍了AD8022的技术性能和工作原理，给出了用AD8022组成的差动输入Sallen-Key滤波器的应用电路。     

Internet网络延时分析

本文对Internet网络延迟进行了较为全面的分析，介绍了几种减少网络延迟的技术。然后提出一种新的方法，并用排队论加以分析。     

磨削技术的挑战、发展和成果

高速切削加工与高硬车削会取代磨削加工吗?专家们说不可能。磨削工艺也许很贵,但是高硬车削也很贵。较严的零件公差对于磨削、车削和高硬车削来说,更利于磨削。当增加中间测量工序时,在磨床上能够稍微接近磨削加工工艺过程环路,而这在其他机床上是很难做到的。     

肝脏占位的B超与MRI图像诊断分析

肝癌、肝血管瘤、肝囊肿是肝内常见占位性病变．笔者在临床工作中发现B超与MRI联合应用。其互补作用可提高肝脏占位的诊断率。本文通过对筛选出来的84例经B超与MRI诊断的肝脏占位病变进行分析。     

非常金猪年本本好礼送Q1

时尚与传统交织的当下,我们已经迎来12年一遇的传统农历新年--金猪年的到来,环顾大街小巷,到处都充满了喜气祥和的节日气氛,采购礼品也被提上了日程.     

智能化脉冲和连续CO_2激光治疗系统

智能化脉冲和连续ＣＯ_２激光治疗系统曲世浦，吴磊，郑庭康，贾锋，范静逸，关奕奕（上海激光技术研究所２００２３３）关键词超脉冲，智能化，ＣＯ＿２激光ＩｎｔｅｌｌｅｃｔｕａｌｉｚｅｄＰｕｌｓｅａｎｄＣＷＣＯ＿２ＬａｓｅｒＴｒｅａｔｍｅｎｔＩｎｓｔｒｕｍｅ?..     

Stored energy analysis of Zn—5Al eutectic alloy in superplastic deformation

The stored energy and the energy release during SPD(superplastic deformation)of a Zn-5Al alloy were studied.The alloy after rolling process gains more stored energy,and the as-rolled speciment can obtain maximum elongation and minimum flow stress without hot loding treatment before SPD.Experimental results show that stroed energy release process is along with SPD process and is also an impetus to SPD.The as -rolled Zn-5Al alloy has 48J/mol stored energy which was measured with DSC(differential scanning calorimeter)and conforms well to the calcuated value.The as-rolled Zn-5Al alloy after SPD with an elongation of 2500% releases 112J/mol stored energy,Analysis shows that the strain rate is in direct ratio to the rate of stred energy release.