“汇编语言程序设计”课程教学改革研究与探讨

为提高汇编语言课程教学效果,适应计算机技术的发展和提高学生实践动手能力,文章从教学内容、教学方法和实验教学几个方面进行了探讨,并提出了类比教学法和使用VisualC＋＋采用内联汇编来进行汇编指令实验教学的方法。     

基于C#液位过程测控软件的设计与实现

在面向对象编程思想基础上,设计与实现了基于C#的液位过程测控软件。利用.NET程序集技术、多线程技术和数据库技术分别实现了用户控件和控制算法的封装、多任务的并发执行和测控数据的存储与管理等。测控系统完成了对液位数据的实时采集与处理,实时曲线和历史曲线的绘制以及控制算法的动态加载等功能。实验表明,该软件具有很好的可靠性和实时性,易于操作并且运行良好。     

论生物基因组的起源和进化

通过分析核基因组、线粒体基因组和叶体基因组的大小与结构，发现这三种基因组教师阴“小基因组”和“大基因组”的形式及与之对应的结构特点，认为它们各自的祖先都是通过分别与“小基因组”和“大基因组”相应的两种途径进化成成为现象核（类核）基因组、线粒体基因组和叶绿体基因组，发展了生物基因组起源和进化的统一模式。     

Scaffolds,levers, rods and springs: diverse cellular functions of long coiled-coil proteins

Long alpha-helical coiled-coil proteins are involved in a variety of organizational and regulatory processes in eukaryotic cells. They provide cables and networks in the cyto- and nucleoskeleton, molecular scaffolds that organize membrane systems, motors, levers, rotating arms and possibly springs. A growing number of human diseases are found to be caused by mutations in long coiled-coil proteins. This review summarizes our current understanding of the multifaceted group of long coiled-coil proteins in the cytoskeleton, nucleus, Golgi and cell division apparatus. The biophysical features of coiled-coil domains provide first clues toward their contribution to the diverse protein functions and promise potential future applications in the area of nanotechnology. Combining the power of fully sequenced genomes and structure prediction algorithms, it is now possible to comprehensively summarize and compare the complete inventory of coiled-coil proteins of different organisms.Received 27 January 2004; received after revision 23 February 2004; accepted 10 March 2004     

Nicotinamide/nicotinic acid mononucleotide adenylyltransferase, new insights into an ancient enzyme

Nicotinamide/nicotinic acid mononucleotide adenylyltransferase (NMNAT) has long been known as the master enzyme in NAD biosynthesis in living organisms. A burst of investigations on NMNAT, going beyond enzymology, have paralleled increasing discoveries of key roles played by NAD homeostasis in a number or patho-physiological conditions. The availability of in-depth kinetics and structural enzymology analyses carried out on NMNATs from different organisms offer a powerful tool for uncovering fascinating evolutionary relationships. On the other hand, additional functions featuring NMNAT have emerged from investigations aimed at unraveling the molecular mechanisms responsible for complex biological phenomena such as neurodegeneration. NMNAT appears to be a multifunctional protein that sits both at the core of central metabolism and at a crossroads of multiple cellular processes. The resultant wealth of biochemical data has built a robust framework upon which design of NMNAT activators, inhibitors or enzyme variants of potential medical interest can be based.     

轧机机架的动态特性仿真与结构优化

应用有限元分析方法,对某铝带二辊轧机机架装配系统进行了动态特性仿真,得出了固有频率和振型的变化规律.针对轧机机架的薄弱环节,通过参数化方法进行灵敏度分析和结构优化设计,使系统的动态特性得到提高,该结论为高性能轧机的设计优化,提供了一定的参考.     

有关CATIA软件的几个使用技巧

在使用CATIA过程中,由于此软件的功能繁多,经常会遇到一些使用问题。针对工作过程中经常遇到的几个问题,提出了不同的解决技巧供相关人员参考,以便在工作中可以针对实际情况而有所选择。     

Chemical studies on the nonlinear optics of coordination compounds

The exploration of molecule-based nonlinear optical (NLO) materials at the molecular level is one of the novel areas developed recently from the viewpoint of chemistry. This review summarizes some of our recent researches on new NLO materials based on coordination compounds, which may have potential applications in optical devices.     

定点FFT在TS201上的高效实现

针对美国模拟器件公司(ADI)推出的ADSP-TS201内部的DRAM存储器不适合标准结构快速傅里叶变换(FFT)对随机读写存储器要求的问题,采用SingLeton结构FFT,并给出了采用该结构FFT的程序流程,选择TS201内部适合定点FFT实现的汇编指令,通过合理安排指令并行和软件流水,在TS201上对定点FFT进行了高效实现.实例验证结果表明,完成32 K点FFT只需要0.46 ms,可用于GPS系统P码直捕的快速实现.     

后基因组时代十年志——兼论十年间生命科学的发展及所面临的挑战

   十年前,“人类基因组计划”这一耗资30亿美元、耗时十余年的伟大科学工程完成之际,人们以为得到了揭开自身生命奥秘的天书,生命科学也划时代地进入了后基因组时代。十年间,一方面,人类基因组的后续工作陆续展开,生命科学持续蓬勃发展的态势;另一方面,基因药物却迟迟不能问世,基因产业逐渐沦为泡沫经济。2010年恰逢人类基因组草图完成10周年,回顾十年间生命科学取得的伟大成就,分析生命科学当下面临的挑战,或许更能理清后基因组时代现代生命科学的发展脉络与走势。