Computer Assisted Neurophysiology by a Distributed Java Program

We have developed a distributed software package which allows neurophysiologists to have at hand a set of network and graphic tools in order to perform the analysis of data collected from the electrical activity of neurons, studied in the experimental laboratory. This system is built around three major components. First, the experimental data are processed in order to select specific data files from the networked computer and display the spike trains as raster dots. The second part selects one type of analysis (e.g., cross-correlation, out of a set of possible choices) after configuration of some specific parameters. Finally, the third component deals with the results of data analyses, which are selected and displayed on a multi-parameter graphic “ring binder.” We have used the Java programming language to implement this application. This recent object-oriented language offers platform-independent software tools including graphic package and standard network protocols.     

分布式内存管理系统的研究与设计

针对中小型企业数据处理的特点，提出了一种基于局域网的分布式内存管理系统，介绍了系统的数据组织方式、设计原理和各功能实体的具体实现。系统利用局域网内存资源存储数据，解决了磁盘输入/输出的性能瓶颈问题。把数据分成包，通过包管理实体对内存资源进行管理，利用同步协议机制保持主包和备包的同步。测试结果表明，利用系统对数据进行处理的效率是本机硬盘的5到7倍。     

The design of a user friendly interactive personal computer package for quality control charts, project management, and linear programming applications

This paper describes the design of a user friendly interactive software package which can easily be used in both educational and industrial environments. The package contains applications for Quality Control Charts, Project Management, and Linear Programming. It is written in the BASIC programming language using the IBM Disk Operating System (DOS version 3.1). An IBM Personal Computer (PC, XT or AT) or compatible with one disk drive, a monochrome VDT and a line or dot matrix printer are required. The programs incorporate human factors considerations and the user is not required to have any previous computer programming experience. The package has data management options for adding new data, deleting data, listing data, storing data on a disk file and printing data collection forms for each program. The programs have been extensively validated using text book examples and comparisons with similar packages on main frame computer systems (such as EZLP, PPERT, LPRG, etc.). Based upon testing, this package was found to be easier to use and produced the desired results in approximately one third of the total time required by using the main-frame packages.     

基于485总线的教学实验系统设计与开发

提出了一种适合于当今高校实验室改革、具有利用总线进行传输,可实现网络化、智能化的电路实验系统的设计方案。该系统采用C/S模式,将学生实验过程中实验台上的所有数据通过485总线采集并传送给客户机,学生通过客户机管理系统完成实验过程中的各项数据采集和处理,实验结果通过局域网传送给服务器,通过服务器管理系统可以让实验室老师对所有学生的实验情况有全面的了解,实现各种功能。     

为支持协同设计对EDBMS的扩充及其实现

计算机支持下的协同设计是ＣＡＤ／ＣＡＭ技术的进一步发展。设计过程中有效的数据共享是协同设计的前提条件；而协同设计过程中用于交流、协调、决策等数据和知识的管理是协同设计系统的成功的基本保证。本文在工程数据库管理系统ＥＤＢＭＳ的基础上，根据协同设计的要求，对ＥＤＢＭＳ进行了扩充，使其在数据共享的基础上，能对用于协同的数据和知识等进行有效管理。为此对ＥＤＢＭＳ增加了支持开放分布式计算，以及多用户、多库处     

A personal computer based system used in electromyography for interpretation and reporting

Programs for rule based electromyography (EMG) interpretation and reporting are described. A number of parameters are obtained during an EMG investigation. The combination of these data leads to a neurophysiological conclusion. Knowledge from the literature, research and experience is the basis for rule development. Rules have been developed for 14 of the most commonly used classifications of an EMG. The syntax is relatively easy and the user may change the rules, add rules or apply the system for other types of data. The results are displayed in a new graphical way. The system presented here is part of an integrated EMG laboratory with administrative routines, distributed databases for storage of results and routines for automatic report generation.     

基于流式处理架构的日志采集系统的设计与实现

对信息系统运行记录、操作日志、告警信息的采集问题进行了研究,提出了一种面向泛政府行业安全运行管理平台的统一日志采集系统。采用基于消息队列的流式处理架构,实现日志采集、日志处理、日志上报等各个环节的解耦;采用标准化接口和插件技术,实现各种异构日志信息的采集和数据上报;采用消息队列的流量削峰技术,保证日志传输的安全可靠;依据日志流量特征,提出一种支持动态调整消费组的设计模式,满足系统的高性能要求。整个系统由日志采集、数据上报、数据管理、系统管理、策略管理、Agent管理、日志源管理模块和日志采集代理(Agent)子系统组成,可满足对各类安全数据的集中分析、安全威胁感知和智能研判。     

Multinode sensing with forward error correction and differential evolution algorithms for noisy cognitive radio networks

Spectrum sensing is a vital phase in Cognitive Radio (CR) to identify the unutilized spectrum for dynamic spectrum access (DSA). Cooperative/multinode sensing is being used for signal detection to achieve spatial diversity gains. In cooperative sensing, the sensing channels are assumed to be noisy. However, the reporting/control channels (channels between CR and fusion center) are also contaminate with the noise, which degrades the cooperative detection accuracy. In this paper, (i) effect of reporting channels are studied and used forward error correction technique (convolutional encoder) to mitigate the effect of reporting channel noise, (ii) differential evolution algorithm is used to evaluate the optimum weights for cooperative users to maximize the sensing performance. Three different detection methods are considered for performance analysis. The simulations are carried out with different signal-to-noise ratio in control channel with and without error correction. The results reveal that, detection probability and accuracy of the system can be improved with convolutional coding together with differential evolution algorithm.     

Godpp: Programs for the presentation and analysis of structural data

The package of FORTRAN programs described provides the field geologist with a system for processing and analyzing orientation data. The facilities offered include the plotting of stereograms, maps and rose diagrams together with rotations and statistical analysis of orientations. Orientation data may be supplied to the package in a variety of frequently used styles. Package facilities are specified by option statements, which the package interprets, that may be supplied in any sequence thus allowing maximum manipulative flexibility. The package has been successfully used to process and analyse structural data from a metamorphic terrain within the Norwegian Caledonides, but may be applied readily to other types of orientation data. The emphasis in writing this package was placed upon the production of usable graphical output, thus replacing tedious manual plotting and drafting tasks. These programs are not designed to undertake sophisticated interpretative operations on orientation data, these tasks remain with the user who will have hopefully more time in which to accomplish them.     

Run-time support for user-level ultralightweight threads on distributed-memory computers

Ultralightweight Thread (uThread) is a library package designed and optimized for user-level management of parallelism in a single application program running on distributed-memory computers. Existing process management systems incur an unnecessarily high cost when used for the type of parallelism exploited within an application. By reducing the overhead of ownership protection and frequent context switches, uThread encourages both simplicity and performance. In addition, uThread provides various scheduling support to balance the system load. The uThread package reduces the cost of parallelism management to nearly the lower bound. This package has been successfully running on most distributed-memory computers, such as the Intel iPSC/860, Touchstone Delta. NCUBE, and TMC CM-5.This research was supported by NSF grants CCR-9109114.     

Clinician use of a pediatric cardiology database on a microcomputer

A pediatric cardiology database was designed and implemented on a microcomputer using the MEDUS/A (Harvard School of Public Health) database management system. This database has potential utility in the areas of clinical research, patient management, and administration. Initial uses of the system include a study of ventricular septal defects, and automation of pacemaker clinic and cardiac catheterization laboratory records. Clinicians with little or no programming experience can alter the database structure and tailor complicated applications to their particular needs. Preliminary evaluation of the system is presented.     

Performance analysis of long-lived cooperative transactions in active DBMS

Active database management systems (ADBMS) are used in different application domains and especially for cooperative and long duration activity management. This paper deals with performance analysis of long-lived cooperative transaction processing in an ADBMS. We first briefly discuss NP-QuadLock – a concurrency control scheme for cooperative and long durational transactions in ADBMS. A restricted version of NP-QuadLock named 2L-QuadLock has been used for simulation. We have modeled such an ADBMS supporting 2L-QuadLock scheme by a queuing model. The failure of the transactions running in such systems has been modeled by a failure recovery model. We have simulated this model for a transaction processing system serving long-lived and cooperative transactions. We also discuss some important emerging application scenarios, where the proposed cooperative complex transaction mechanism can be used (e.g. 3G-service environment, ubiquitous computing environment, feature composition in intelligent network environment, multi-site and multi-domain web-services).

An important objective of our work is to analyze quantitatively (a) the performance penalty on the system due to the partial abort, the number of locks held by a transaction, the number of states of the transactions, and (b) the gain in the performance of the system with the cooperation semantics proposed in 2L-QuadLock concurrency control mechanism. We have analyzed the effect of various parameters such as partial abort rate, cooperation rate, number of locks held by a transaction, multiprogramming level, on the performance metrics such as average service time, average saga length and the degree of compensation. Later, we characterize the application scenarios based on some important simulation parameters, and discuss the application performance needs for each of the application scenarios. The required performance parameters that need to be used for these application scenarios and the corresponding performance results using 2L-QuadLock are also discussed.     

Simulation as decision tool for capacity planning

In this paper we demonstrate how discrete event simulation technique can be used to optimise the use of catheterization capacity. The patient flow at the catheterization room is described. A simulation model of the current situation was built in MedModel, a discrete event simulation package, and the model was validated. A short presentation of MedModel is given. To investigate alternative ways to optimise the use of the catheterization room three experiments were formulated, modelled and simulated. Two different scheduling strategies were applied to the current situation and the three experimental situations. The number of patients that can be treated and the duration of a working day were determined as measures of performance. The results of the simulation experiments are discussed. The results of these experiments give the management of the catheterization room valuable information how to optimise the use of the catheterization room.     

生产报表系统在气田的应用与提高

生产报表系统是采气厂为生产板块设计的中端应用生产信息系统,实现了井站生产数据自动采集、厂级范围内的生产数据共享,为气田开发管理和科研工作提供依据.分析了报表系统不同时期的特点及改进优化措施,并依靠气田配套的SCADA数据采集系统、PI实时数据库系统和Oracle关系数据库系统,最终实现前端与中端数据的无缝对接与综合应用.实践应用表明,生产报表系统为气田数据管理与应用提供了高效的生产数据管理平台,降低了一线劳动强度,能更好的服务于气田开发与管理.     

网络安全管理技术研究

针对新的安全形势,网络安全管理作为一类更全面、更智能化的综合技术业已得到越来越多的关注,不少相关产品也已经出现在市场上.网络安全管理的作用是通过对各种安全技术和安全产品的统一管理和协同来实现整体的安全.首先总结比较了现有的网络安全管理实现体系结构.然后,回顾了在网络安全管理中占重要地位的安全策略研究的进展,介绍了信息集成、智能分析引擎、协同及通信规范这3种网络安全管理的关键实现技术.最后,分析了网络安全管理当前的不足以及未来的发展趋势.     

智能管理系统在高校大数据实验室管理中的应用

实验室是高校实验教学和科学研究的设施基础,对培养学生的科学素养、实践动手能力等有非常重要的现实价值。在教学改革不断推进,科研型、创新型、综合型人才社会需求量爆炸式增长以及大数据不断普及的时代背景下,高校实验室在高校教育中的应用地位越来越高。而为了与之相适应,高校通常会在实验室配备高科技仪器设备供学生和教师开展教学实验活动,同时,为了合理使用这些精密的仪器设备资源,在保证安全性的前提之下,实现高校实验室功能的最大化发挥,大部分高校都开始在实验室管理中导入智能管理系统。因此,建设基于智能环境的高校大数据实验室管理系统不仅是新课程改革的内在要求,更已成为高校实验教学发展的未来趋势。本文主要探讨智能管理系统在高校大数据实验室管理中的应用。     

Laboratory Automation in a Supplemental Newborn Screening Laboratory

The Institute of Metabolic Disease performs Supplemental Newborn screening for genetic biochemical abnormalities. A challenge facing many specialized high throughput-screening laboratories is fast, efficient data management, instrument integration, reporting, and invoicing. The Supplemental Screening laboratory operates three tandem mass spectrometry analyzers and screens samples for compounds that are not examined by typical newborn screening laboratories. The Institute of Metabolic Disease implemented NeoMate™ LIMS (Laboratory Information Management System) to streamline sample demographic entry, data entry (manual, for more specialized tests and automated entry from instruments), automatic result reporting, follow-up and invoicing. The Institute consists of six departments which include; Supplemental Screening, Tissue Culture, Molecular Diagnostics, Neuropharmacology, Neurochemistry and Mass Spectrometry. These departments have unique requirements that differed from the high-throughput supplemental screening department. This required a system that offered the flexibility to provide custom interpretations, maintaining patient histories, sample storage, and graphing of patient results. This paper will focus on the process of implementing automation from project initiation, flow charting through software installation, instrument integration, system integration and going live.     

Image analysis of restriction enzyme fingerprint autoradiograms

A genome mapping system has been developed that reads and assembles data from clones analysed by restriction enzyme fragmentation and polyacrylamide gel electrophoresis. Input data for the system can be most effectively obtained by the use of a scanning densitometer and image-processing package, such as that described in this article. The image-processing procedure involves preliminary location of bands, cooperative tracking of lanes by correlation of adjacent bands, a precise densitometric pass, alignment of the marker bands with the standard, optional interactive editing, and normalization of the accepted bands.