基于Windows 98的高速数据采集系统实时性研究

在工业控制领域,实时数据采集是一个基本且重要的环节.如何提高数据采集的实时性一直是工控技术人员所关心的问题.Windows 98的出现给软件业带来了革命性的变化,也给工业控制软件的设计提出了诸多的挑战.Windows 98的新特性使其实时性大大降低,Windows 98环境下的数据采集速度难以提高.结合在Windows 98平台上利用C++Builder 5开发真空开关真空度在线检测系统的开发实际,提出了一种如何利用多线程技术提高Windows 98下高速数据采集的实时性的可靠方法.     

Windows下磁盘的远程管理

介绍在Windows2000和Windows98中远程管理磁盘的四种方法和具体操作。     

风、烟流量测量系统问题分析与改造

火力发电厂风、烟流量测量系统通用机翼孔板测量，由于风、烟中含有煤粉、干灰，造成测量误差，我们对问题进行了分析，并于2006年对我厂四台机组送风流量测量系统进行了改造，大胆使用ST98型质量流量计，通过一年多的使用，达到了满意的效果。     

WIN98下并行口数据采集的编程与实现

WIN9x操作系统采用 Vx D方式来管理对于硬件的访问 ,程序的硬件操作能否与该机制相适应 ,对于软件的可靠性有着重要意义。主要介绍了 WIN9x环境下 Vx D(虚拟设备驱动程序 )及其优点 ,并与其它几种数据采集方法做了比较。分析了在 WIN95/98下 ,通过并行口读取数据采集卡数据的 Vx D开发方法 ,以及有关调试软件 (Soft/Ice)的使用。文中给出了一个程序实例 ,表明该方法是可行的。     

一线多机上网的联接与调试

介绍了在Windows98操作系统下，所有的微机联接成对等网络，多台微机通过带有一线连接的微机上网浏览。并介绍此方法的安装、调试过程。     

WINDOWS98共享SCO UNIX网络资源

论述了在局域网中如何使WINDOWS98共享SCOUNIX网络资源，给学生提供了一个熟悉SCOUNIX环境的切实可行的方案。     

PC Linux集群系统量子化学从头计算性能研究

个人计算机性能的提高与Linux操作系统的发展使基于PC的Linux集群系统成为量子化学高性能计算的平台。本文研究了Gaussian 98程序在PentiumⅢ与Pentium 4计算机建立的两组小型集群系统中的运算性能。通过设计的5个计算样例，对Hartree-Fork、DFT、MP2级别的单点能量计算、几何结构优化、频率和NMR等化学性质计算在16个并行节点内的速度增长性与扩展性进行了分析和讨论，指出了主节点计算能力对整个集群系统效益的影响，结果表明各类计算作业在8-12节点内有着较好加速性，频率与MP2作业超过12节点后并行效益迅速下降，NMR计算在16节点时仍有较高速度增长性。     

Altered Elemental Distribution in Male Rat Brain Tissue as a Predictor of Glioblastoma Multiforme Growth—Studies Using SR-XRF Microscopy

Glioblastoma multiforme (GBM) is a particularly malignant primary brain tumor. Despite enormous advances in the surgical treatment of cancer, radio- and chemotherapy, the average survival of patients suffering from this cancer does not usually exceed several months. For obvious ethical reasons, the search and testing of the new drugs and therapies of GBM cannot be carried out on humans, and for this purpose, animal models of the disease are most often used. However, to assess the efficacy and safety of the therapy basing on these models, a deep knowledge of the pathological changes associated with tumor development in the animal brain is necessary. Therefore, as part of our study, the synchrotron radiation-based X-ray fluorescence microscopy was applied for multi-elemental micro-imaging of the rat brain in which glioblastoma develops. Elemental changes occurring in animals after the implantation of two human glioma cell lines as well as the cells taken directly from a patient suffering from GBM were compared. Both the extent and intensity of elemental changes strongly correlated with the regions of glioma growth. The obtained results showed that the observation of elemental anomalies accompanying tumor development within an animal’s brain might facilitate our understanding of the pathogenesis and progress of GBM and also determine potential biomarkers of its extension. The tumors appearing in a rat’s brain were characterized by an increased accumulation of Fe and Se, whilst the tissue directly surrounding the tumor presented a higher accumulation of Cu. Furthermore, the results of the study allow us to consider Se as a potential elemental marker of GBM progression.     

Pilot Scale Evaluation of Ozone and Other Drinking Water Disinfectants Using Mutagenicity Testing

Mutagenicity produced by the oxidants chlorine, chloramines, chlorine dioxide and ozone when used in drinking water treatment was examined in a pilot scale study conducted at Edmonton, Canada. Both the Ames test, and a yeast assay using Saccharomyces cerevisiae (strain D7144–2) were employed. In the Ames test, chlorination produced utagenicity the most frequently; samples obtained following ozonation rarely were mutagenic. In the yeast assay, utagenicity was seen only infrequently. Granular activated carbon effectively removed mutagenicity for a long period of time.     

A study on retention of MWCNT in robocasted MWCNT-HAP scaffold structures using vacuum sintering technique and their characteristics

Bioceramic scaffolds are being widely employed in bone tissue engineering applications for their ability to interact with host tissues without inducing any toxicity. Additionally, bioceramics possess good biocompatibility, osteointegration, osteoinduction, and biodegradation characteristics. Hydroxyapatite (HAP) is one such bioceramic known to exhibit closeness to natural bone in terms of chemical composition. The present reports additive manufacturing of HAP and Multiwalled carbon nanotubes (MWCNTs) reinforced HAP scaffold structures for bone tissue engineering applications using the Robocasting technique. Carboxymethyl Cellulose (CMC) was employed as the polymeric binder in this study to prepare the highly viscous HAP and CNT-HAP slurry ideal for robocasting of the scaffold structures. Different percentages of MWCNT (0.5, 1 and 2 wt%) incorporated into the developed CNT-HAP scaffold structures and were vacuum sintered at 1000 °C for 15 min. Vacuum sintering was found to effectively prevent oxidation of MWCNT which is subjected to decomposition at temperatures above 400 or 500 °C in Oxygen atmosphere as per literature. Further, the retention of MWCNTs in the developed CNT-HAP structures post sintering was confirmed using FESEM imaging. The mechanical characterizations revealed that 0.5CNT-HAP structures exhibited highest compression strength (3.36 ± 0.67 MPa) in comparison to 1CNT-HAP and 2CNT-HAP structures. Also, the in vitro biological characterizations demonstrated that the developed CNT-HAP scaffold structures were cytocompatible and remained stable for about 35 days at 37 °C.