IgA肾病肾组织中肌动蛋白的异常表达

目的：探讨ＩｇＡ肾病（ＩｇＡＮ）时肾组织内α－平滑肌肌动蛋白（α－ＳＭＡ）表达的病理学及临床意义。方法：应用Ｓ－Ｐ法对６０例肾活检组织进行α－ＳＭＡ、增殖细胞核抗原（ＰＣＮＡ）免疫组化染色,以半定量的方法进行分级,并和肾小球损伤程度、肾小管间质损伤程度、肾功能状态及超微结构改变相对照,进行统计学处理。结果：肾小球内α－ＳＭＡ和ＰＣＮＡ的表达均显著提高,二者密切相关。间质内α－ＳＭＡ和ＰＣＮＡ亦显著     

元器件快讯

大功率耦合器ＢｉｒｄＣｏｍｐｏｎｅｎｔｓＰｒｏｄｕｃｔｓ（ＢＣＰ）推出了１００ -ＡＣ -ＦＦＮ -２０型大功率耦合器 ,它的频率范围为８００～２５００ＭＨｚ ,功率为１００Ｗ ,耦合度为２０ｄＢ ,插入损耗为０．３ｄＢ ,主传输线和分支线的最大驻波比为１．１５，频率灵敏度为±０．１ｄＢ。１００ -ＡＣ -ＦＦＮ -２０型大功率耦合器的反射功率取决于外接负载。其工作温度高达１０５℃。该器件主要用于蜂窝和ＰＣＳ领域 ,重量约为２２６．８克 ,单价为１．７５美元。咨询编号 :０１０４４０飞利浦半导体与Ｐｌａｎｔｒｏｎｉｃｓ公司…     

产品与市场

一卡在手天下路好走胜创科技推出三合一ＰＣＭＣＩＡ卡ＭＯＸＡ推出ＴＣＰ／ＩＰ网络下的ＲＳ－２３２设备服务器胜创科技公司推出了以太网１０／１００Ｍｂ／ｓＬＡＮ＋Ｆａｘ＋Ｍｏｄｅｍ三合一的ＰＣＭＣＩＡ卡,此卡沿袭了胜创科技ＰＣ卡一贯轻薄小巧的特点。此卡仅有...     

电镜在中枢神经系统中圆细胞肿瘤诊断中的作用

本文报道９８例中枢神经系统小圆细胞肿瘤电镜诊断资料。常规透射电镜确诊７９例（８０．６％）,加免疫组化后确诊１５例（１５．３％）,但仍有４例（４．１％）不能确诊。确诊后的肿瘤类型包括胶母细胞瘤、少突胶质细胞瘤、室管膜瘤、髓母细胞瘤、神经母细胞瘤松果体细胞瘤、原始神经外胚层瘤、恶性淋巴瘤、转生性未分化鳞癌和未分化腺癌、以及黑色素瘤。对上述肿瘤的主要超微结构特征进行了描述,并结合文献阐明了电镜检查对中枢     

电镜在中枢神经系统小圆细胞肿瘤诊断中的作用

本文报道９８例中枢神经系统小圆细胞肿瘤电镜诊断资料。常规透射电镜确诊７９例（８０．６％）,加免疫组化后确诊１５例（１５．３％）,但仍有４例（４．１％）不能确诊。确诊后的肿瘤类型包括胶母细胞瘤、少突胶质细胞瘤、室管膜瘤、髓母细胞瘤、神经母细胞瘤、松果体细胞瘤、原始神经外胚层瘤、恶性淋巴瘤、转移性未分化鳞癌和未分化腺癌、以及黑色素瘤。对上述肿瘤的主要超微结构特征进行了描述,并结合文献阐明了电镜检查对中枢神经系统小圆细胞肿瘤诊断和鉴别诊断有七个方面的作用。     

NetFRAME公司推出超级网络服务器并获大奖

美国ＮｅｔＦＲＡＭＥ公司发布其ＮＦ８５００系列中的两款新品ＮＦ８５７０和ＮＦ８５９０。它们是基于ＩｎｔｅｌＰｅｎｔｉｕｍ１５０ＭＨｚ多ＣＰＵ技术（４路ＳＭＰ），标准内存、硬盘均为Ｐｅｎｔｉｕｍ１００ＭＨｚ产品的１．５倍。ＮＦ８５９０服务器中的称为“Ｎｏｔｅｓ信息集群服务器”的配置为：ＮｅｔＦＲＡＭＥＰｅｎｔｉｕｍ１５０ＭＨｚＣｌｕｓｔｅｒＳｅｒｖｅｒ８５９０；ＭｉｃｒｏｓｏｆｔＮＴＳｅｒｖｅｒ３．５．１；ＬｏｔｕｓＮｏｔｅｓ４．０。目前，单台ＮｅｔＦＲＡＭＥＮｏｔｅｓＭｅｓｓａｇｅＣｌｕｓｔｅｒ…     

PACS简介

ＰＡＣＳ简介朱云龙１９９４年９月，美国联邦通信委员会ＦＣＣ的ＪＴＣ（联合技术委员会）通过了一个新的ＰＣＮ标准──ＰＡＣＳ（ＰｅｒｓｏｎａｌＡｃｃｅｓｓＣｏｍｍｎｕｉｃａｔｉｏｎＳｖｓｔｅｍ──无线通信接入系统）。该标准是Ｂｅｌｌｃｏｒｅ研究了１０年的...     

CDMA—PCN与微波固定业务的相互影响

ＣＤＭＡ－ＰＣＮ与微波固定业务系统共享１８５０－１９９０ＭＨｚ的微波频段，由引带业了ＣＤＭＡ－ＰＣＮ对ＦＳＭ系统的干扰，以及ＦＳＭ系统对ＣＤＭＡ－ＰＣＮ的干扰，中分析了这两种干扰对系统性能的影响，并提出了改善系统性能的方案。     

新一代Windows环境下的网络软件PC－NFSpro

新一代Ｗｉｎｄｏｗｓ环境下的网络软件ＰＣ－ＮＦＳｐｒｏ何绍德ＰＣ－ＮＦＳｐｒｏ是美国ＳｕｎＳｏｆｔ公司新一代ＩＣＰ／ＩＰ和ＮＦＳ网络软件，基于３２位虚拟设备驱动（ＶｘＤ）技术，具有很好的网络性能。它不使用常规的ＤＯＳ内存。在客户机／服务器结构中，它提...     

PCS用PA驱动器

由于ＰＣＳ日益普及,使得对ＰＣＳ 频段高性能ＲＦ ＩＣ的需求增加。ＰＣＳ频段的发送和接收频率分别规定为１８５０－１９１０ＭＨｚ和 １９３０～１９００ＭＨｚ。当移动手机正在发送时,发送和接收频段邻近导致接收干扰,因此增加接收器的噪声功率。为降低噪声功率和改善隔离,大多数发送器系统设计在ＰＡ（功率放大器）驱动器和ＰＡ之间采用ＳＡＷ（表面声波）滤波器。然而,在ＰＣＳ发送频段中心频率的典型ＳＡＷ滤波器只提供大约１５ｄＢ接收频段衰减。这种低衰减导致在接收器前端可观的发射器噪声干扰。为解决此问题,系统设计人员…     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks