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关键词： 硬盘   正确识别   朋友   引导区   提示信息   侥幸心理   重要信息   标识符   备份方法   适应对象  

摘要： 可能不少的朋友在使用电脑的时候,可能都会碰到如此尴尬的情况:硬盘瘫痪了,而开机时没有任何关于硬盘坏了等此类的提示信息,有的朋友可能心存侥幸心理,认为这只是一般的引导区问题,用SYS C:就没事了,当打入C:或是SYSC:命令时,出现一句错误提示INVALID DRIVE SPECIFICATION(错误的驱动器标识符),即不认硬盘。有的朋友可能马上想到重做分区或是将硬盘做格式化。 此类问题属于分区故障,对于很多未能备份此类信息的朋友来说,实际上,完全可用ndd来完成。

关键词： size index   motor unit   electromyography   computer simulation  

摘要： A computer simulation was performed to investigate the size index as a motor unit identifier in electromyography. The size index calculated from the amplitude and area of the simulated motor unit action potential (MUP) was plotted against the distance between the needle electrode and current source to show how the index changes as a function of the distance. The index of the MUP also was plotted against the number of muscle fibers belonging to a single motor unit, the size of the motor unit territory, and the diameter of the muscle fibers in order to establish the major determinants of the index. The index was relatively constant for the distance less than 2 mm between the needle electrode and closest edge of the current source. It changed logarithmically with the number of muscle fibers and with the diameter of the fibers. (C) 1999 Elsevier Science Ltd. All rights reserved.

关键词： COMPUTER software   ENGINEERING design -- Software   JAVA (Computer program language)  

摘要： Reports on NexPrise Inc.'s announcement of a revamp of its flagship product, ipTeam, a Web-based collaborative engineering tool used by product design teams at the Boeing Co., Raytheon and Ford Motor. Launching of ipTeam 3.0; Rewriting of release in Java.

关键词： 数据库服务器   操作系统   计算机名   系统组网   标识符   主机名   域名   网络   管理器   应用程序  

摘要： 一、名称标识符的定义 在组网过程中需弄清楚所使用的不同操作系统对诸如域名、计算机名或主机名等名称约定问题;同时如果网络内使用数据库的话,还要注意所用数据库对此类问题的定义。 例如:我在使用NT Server 4.0操作系统组网过程中出现了以下问题: 1.数据库服务器使用的平台是NT Server 4.0操作系统(成员服务器),采用的数据库是Microsoft SQLServer 6.5。在安装SQL Server 6.

关键词： fetal blood   zeta globin   epsilon globin   gamma globin   CD71  

摘要： OBJECTIVE: We evaluated monoclonal antibodies to 3 cell surface and 3 intracellular antigens for their relative usefulness as markers to identify fetal cells in maternal blood. STUDY DESIGN: With indirect immunocytochemical labeling techniques, antigen expression was studied in 52 fetal blood samples as a function of gestational age, fetal karyotype, the presence of multiple anomalies detectable on ultrasonography, and anemia. RESULTS: A decline in the expression of these antigens as gestational age advanced was demonstrated. Samples from karyotypicaily abnormal fetuses, fetuses with multiple anomalies, and anemic fetuses showed an antigenic distribution that was immature for gestational age. In normal fetuses zeta globin and epsilon globin expression decreased after 12 to 14 weeks, potentially limiting the utility of these proteins as fetal cell markers in the isolation of fetal cells from maternal blood. CONCLUSIONS: The results of this study demonstrate a fetal developmental hematologic profile that varies with gestational age and also with pathologic condition. Antibodies to the gamma chain of fetal hemoglobin and the transferrin receptor (CD71) are the most useful fetal cell-identifying reagents. (Am J Obstet Gynecol 1999;180:1234-9.).

关键词： 图书在版编目   著录项目标识符  

摘要： 试行中的图书在版编目数据中著录项目标识符存在诸多讹脱。解决的对策是提高编目人员素质。

关键词： Friction  

摘要： This paper presents methods for identifying the tire-road friction coefficient. The proposed methods are: an observer-based least square method and an observer/filtered-regressor-based method. These methods were designed assuming that some of the states are not available since physical parameter identification methods developed assuming that the system states are available are not attractive from a practical point of view. The observer is used to estimate signals which are difficult or expensive to measure. Using the estimated states of the system and the filtered-regressor, the parameter estimates are obtained. The proposed methods are evaluated on an eight state nonlinear vehicle/transmission simulation model with a Bakker-Pacejka's formula tire model. Vehicle tests have been performed on dry and wet roads to verify the performance of the methods. It has been shown through simulations and vehicle tests how the RPM sensors can be used with observer based identification methods to estimate the tire-road friction from measurements of engine rpm, transmission output speed and wheel speed. The proposed methods will be useful in the implementation and adaptation of vehicle collision warning/avoidance algorithm since the tire-road friction can be estimated only using the RPM sensors which are currently being used in production vehicles.

关键词： Communication channel equalisation and identification   adaptive signal processing   least squares approximations   adaptive semiblind channel identifier   short training sequences   robust channel identifier   least-squares techniques   blind equalisers   adaptive equalisers   Interpolation and function approximation (numerical analysis)   second order methods   telecommunication channels   identification  

摘要： A novel adaptive channel identifier based on least-squares techniques is provided. An additional requirement that relatively short training sequences are used to initialise the proposed algorithm is further introduced, leading to the so called semiblind approach. Simulations show that when the subchannels share common root(s), a condition notorious for being the main difficulty in the applicability of second order methods, the proposed technique is more robust than the existing algorithms.

关键词： Java语言   程序设计语言   开发环境   应用程序  

摘要： １概述Ｊａｖａ语言于１９９５年５月２３日推出，获得了极大的成功，甚至改变了计算模式，在世界范围内，引起了一股Ｊａｖａ热。它是一种跨平台的、适合于网络计算环境的、新的面向对象程序设计语言。Ｊａｖａ语言的基础是Ｃ＋＋语言，但除去了其中易出错部分，也被称为...

关键词： 数据建模   语义   对象   最大基数   最小基数   标识符  

摘要： 数据建模是建立用户数据视图的模型过程，而语义对象模型是用来文档化用户需求并建立数据模型的，然后将数据模型转化为数据库设计，而数据库设计表征了DBMS用户所需求的那些项目，本文通过一个实例探讨了运用语义对象进行数据建模。