图形终端仿真方法与技术

本文讨论利用图形定义语句、异步串行通讯中断处理和缓冲区同步控制等技术,在IBM个人计算机上开发的图形汉字仿真系统,从而使IBM个人计算机成为其它高档计算机系统的图形汉字仿真终端。     

A gelatin sponge model for studying tumor growth: quantitation of tumor cells and leukocytes in the CHO tumor

Summary A gelatin sponge model system for tumor cell inoculation and retrieval of tumor-associated leukocytes is described. Gelatin sponges pre-implanted in nude mice harboring tumorigenic Chinese hamster ovary cells (line CHO) were examined at 2 and 11 days after injection of tumor cells for tumor cell content and leukocyte accumulation after digesting the sponge matrix in collagenase solution.The data indicate a progressive influx of host cells consisting primarily of macrophages, neutrophils and lymphocytes. The total number of viable tumor cells as well as the fraction of surviving tumor cells with clonogenic potential also increased with tumor age. Blank sponges not harboring tumor cells elicited an inflammatory response in the animals which did not change appreciably with length of sponge residence. However, when the sponges were harboring tumor cells, the accumulation of host leukocytes far exceeded that which occurred in blank sponges. This observation suggests a host response directed toward the tumor which is absent in animals bearing blank sponges. Apart from providing anchorage for injected cells, the gelatin sponge, by virtue of its digestibility in collagenase, makes possible the easy retrieval and precise quantitation of tumor-associated host cells.Supported by the United States Department of Energy and National Institutes of Health Grant P41-RR01315.     

<Emphasis Type="Italic">The Art of War:</Emphasis> Innate and adaptive immune responses

Research over the last several years has greatly advanced our understanding of the mechanisms by which the immune system functions. There exist two main branches of immunity, termed innate and adaptive immunity. Innate immunity uses the genetic memory of germline-encoded receptors to recognize the molecular patterns of common pathogens. Adaptive immunity, akin to somatic memory, is a complex system by which the body learns to recognize a pathogens unique antigens and builds an antigen specific response to destroy it. The effective development of the overall immune response depends on careful interplay and regulation between innate and adaptive immunity. Here we review our current understanding of how these integrated systems distinguish targets against which a response is appropriate and neutralize potentially pathogenic challenges.Received 8 May 2003; accepted 2 June 2003     

Gel-electrophoretic description of European populations ofTerellia virens (Loew) (Diptera,Tephritidae); implications for its use as an agent for the biological control ofCentaurea spp. (Asteraceae) in North America

Allozyme frequencies of 15 enzyme loci, 14 of which were polymorphic, were used to characterize sevenTerellia virens populations originating from three allopatrically distributedCentaurea species. The two populations whose origins were geographically furthest apart, from Israel (onC. iberica) and from Switzerland (onC. vallesiaca), showed relatively high values of genetic distance from the 5 populations sampled in Austria and Hungary (onC. maculosa) (Nei's D>0.07). The latter five displayed a high degree of genetic similarity. No diagnostic (fixed) allelic differences were observed between these three groups ofT. virens populations, but they could be well characterized by significant differences in allelic frequencies at 9 enzyme loci. Independently of this study, the populations from Switzerland (C. vallesiaca) and eastern Austria (C. maculosa) were selected as potential source populations for future introductions into North America for the biological control of introducedC. maculosa andC. diffusa. Based on the observed genetic differences and results from field experiments on the host specificity of these two potential source populations, it is argued that host specificity screening tests should be conducted separately for local (host plant) populations, as such populations might accept a different set of hosts. Biotype mismatch and the risk of spill-overs to native species could thus possibly be reduced.     

MEDB宿主C预编译程序

ＭＥＤＢ是一个自行研制的具有自主版权的微机工程数据库管理系统．在讨论ＭＥＤＢ宿主系统结构的基础上，论述了宿主Ｃ预编译程序在扫描方案确定、目标代码设计与生成、用户查错方式等方面的策略与技术．实践证明，ＭＥＤＢ宿主Ｃ预编译程序具有体积小、编译速度快、查错方便等优点，是一个成功的软件系统     

厦门海水鱼五种锥吻绦虫（包括一新种）记述

寄生于海水鱼类体内锥吻目绦虫有犁头鳐尼柏绦虫新种、达氏尼柏绦虫、等齿四吻绦虫、多氏古历罗绦虫（幼虫）和林氏耳槽绦虫（胚囊蚴）五种，后四种为宿主新记录。     

LCD显示屏的上位机软件设计

分析了图形点阵式LCD显示系统的上下位机组成结构.以VC为开发平台,设计了上位机软件系统,它由文件、编辑、转换、显示、通信、帮助等6部分组成,可实现文本/图形文件的读写、文件点阵信息的转换、显示及信息下传,并可针对不同控制对象将此系统进行相应移植.     

基于DSP的USB2.0高速通信接口设计与实现

兼顾安全性和实时性的工业控制网络密码卡将数字信号处理器和USB接口结合在一起,可为控制系统提供高速数据加、解密处理的数据通信能力.在分析系统工作原理的基础上,对基于TMS320C6211数字信号处理器平台的高实时密码系统扩展USB2.0的高速通信接口进行了系统硬件设计、软件设计和开发实现,研究结果揭示揪了方案的可行性和实用性.     

USB 2.0 OTG控制器设计与验证

普通的USB系统使用"主从"的架构,USB主机端(即电脑)是"主",而USB外围设备是"从",主从之间的通信必须依赖于PC主机的存在。USB OTG技术改变了这种状况,外围设备不再只能作为单纯的"从",它有时候也可以成为主机端,实现设备之间的通信。文中正是基于这种状况,研究了USB OTG补充规范,在嵌入式系统的平台上,完成了一种OTG控制器的硬件设计与实现。     

体育行政与体育社团良性互动实现机制的探索——以江苏省体育社团改革发展为例

运用文献资料法、专家访谈法和实证分析等方法,阐述了体育社团的发展现状,对江苏省体育社团在社会化实体化改革过程中取得的成果进行认真探讨和总结,发现存在的问题和不足,努力探索体育社团与体育行政之间有效衔接和良性互动得以实现的长效机制,为促进体育社团科学发展,为全国体育社团的改革和发展提供有益的理论支持和实践路径。