单片机和计算机的串口通信

Microsoft提供的MSComm控件（ActiveX控件），为用户在Windows界面下的应用程序中创建串口通信功能提供了一种简便、快捷的方案。介绍了利用VB制作类似示波器的应用程序界面，调用MSComm控件来实现PC机与MCS－51系列单片机进行串口通信的方法。     

我国高校思想政治教育改革新策略研究

思想政治教学是有关学生修养、素质、道德、行为等的教学,对于树立学生正确的世界观、人生观和价值观具有积极的作用。高校教学作为培养高素质人才的主要渠道,不仅能够教给学生专业知识,更重要的是可以通过弘扬优秀文化,传播党的先进思想促进学生综合素养的提高。随着近年来教育教学改革的深入实施,传统的高校教学模式已经不符合现代化教学的理念,不利于学生更好的成长。在创新理念下,高校教学必须走出原来的误区,从学生的角度来授课,特别是要注重学生思想政治教育,对以往的教学思路加以改革,并强化科学教学,从而为社会输送更多的人才。     

基于扩展故障树的某滑油系统专家诊断知识获取

针对基于规则的专家诊断系统中知识获取的“瓶颈”问题,提出一种基于扩展故障树的专家诊断知识获取方法,并用于获取某滑油系统的专家诊断知识.在建立某滑油系统传统故障树的基础上,通过附加故障现象、故障检测方法、诊断建议等信息,形成某滑油系统的扩展故障树,并与基于规则的专家诊断系统结合,试图从扩展故障树中构建滑油系统的专家诊断知识.     

Flows around two airfoils performing fling and subsequent translation and translation and subsequent clap

The aerodynamic forces and flow structures of two airfoils performing “fling and subsequent translation“ and “translation and subsequent clap“ are studied by numerically solving the Navier-Stokes equations in moving overset grids. These motions are relevant to the flight of very small insects. The Reynolds number, based on the airfoil chord length c and the translation velocity U, is 17. It is shown that: (1) For two airfoils performing fling and subsequent translation, a large lift is generated both in the fling phase and in the early part of the translation phase. During the fling phase,a pair of leading edge vortices of large strength is generated; the generation of the vortex pair in a short period results in a large time rate of change of fluid impulse, which explains the large lift in this period. During the early part of the translation, the two leading edge vortices move with the airfoils;the relative movement of the vortices also results in a large time rate of change of fluid impulse, which explains the large lift in this part of motion. (In the later part of the translation, the vorticity in the vortices is diffused and convected into the wake.) The time averaged lift coefficient is approximately 2.4 times as large as that of a single airfoil performing a similar motion. (2) For two airfoils performing translation and subsequent clap, a large lift is generated in the clap phase. During the clap, a pair of trailing edge vortices of large strength are generated; again, the generation of the vortex pair in a short period (which results in a large time rate of change of fluid impulse) is responsible for the large lift in this period. The time averaged lift coefficient is approximately 1.6 times as large as that of a single airfoil performing a similar motion. (3) When the initial distance between the airfoils (in the case of clap, the final distance between the airfoils) varies from 0.1 to 0.2c, the lift on an airfoil decreases only slightly but the torque decreases greatly. When the distance is about lc， the interference effects between the two airfoils become very small.     

Integrable Hierarchy Covering the Lattice Burgers Equation in Fluid Mechanics:N-fold Darboux Transformation and Conservation Laws

Burgers-type equations can describe some phenomena in fluids,plasmas,gas dynamics,traffic,etc.In this paper,an integrable hierarchy covering the lattice Burgers equation is derived from a discrete spectral problem.N-fold Darboux transformation(DT) and conservation laws for the lattice Burgers equation are constructed based on its Lax pair.N-soliton solutions in the form of Vandermonde-like determinant are derived via the resulting DT with symbolic computation,structures of which are shown graphically.Coexistence of the elastic-inelastic interaction among the three solitons is firstly reported for the lattice Burgers equation,even if the similar phenomenon for certern continuous systems is known.Results in this paper might be helpful for understanding some ecological problems describing the evolution of competing species and the propagation of nonlinear waves in fluids.     

光源谱宽对法布里-珀罗干涉式光纤传感器工作灵敏度的影响

对干涉式光纤传感器来说,光源的谱宽直接影响着传感器的工作特性。从法布里—珀罗干涉式光纤传感器出发,推导其灵敏度的理论表达式,并用MathCAD软件进行了数学分析。讨论了光源谱宽对传感器灵敏度的影响。介绍了具有温度反馈功能的法布里—珀罗光纤干涉实验系统,给出了用该实验系统拍摄的谐振曲线照片。从该系统进行的两个重要的实验(不同干涉腔长的灵敏度对比实验和不同干涉长度的光源实验)表明,法布里—珀罗干涉式光纤传感器的灵敏度与光源谱宽的理论表达式是正确的,理沦公式与实验结论能很好地吻合。最后指出了该方法可以用于分析其他类型的干涉式光纤传感器的灵敏度问题,为光源的选择提供了参考。     

利用表面碳氢、碳卤活化偶联反应制备碳纳米结构

性质上的多样性使得对碳材料的研究一直以来都是热门课题.随着纳米技术的不断发展,尤其是扫描探针显微镜(SPM)的应用,促使表面化学成为当今热门的研究领域之一.近年来,包括本课题组在内的国内外很多研究组利用扫描探针显微镜,在超高真空(UHV)条件下通过在表面活化碳氢、碳卤键,构筑了多种新颖碳纳米结构.本文结合本课题组的近期研究工作,着重介绍了在金属表面通过碳氢、碳卤活化的手段构筑碳纳米结构的研究,并对前体分子在表面的反应性进行了探究.     

310SS在SO2-S2-N2气氛中高温腐蚀行为

研究了３１０ＳＳ（ｓｔａｉｎｌｅｓｓ ｓｔｅｅｌ）在５５０－６５０℃、常压下、０．５％ＳＯ２－Ｓ２－２．０％Ｎ２及６００℃、常压下、２．３％ＳＯ２－Ｓ２－８８．８％Ｎ２条件下高温氧化－硫化行为。ＳＥＭ／ＥＤＸ、ＸＲＤ等技术对腐蚀产物形貌及腐蚀层结构观察、分析表明,３１０ＳＳ的腐蚀速率温度升高而升高;当温度相同时,气氛中Ｖ（Ｓ２）／Ｖ（ＳＯ２）升高时,腐蚀速率也升高,但变化不大。主要腐蚀可分为３层：     

研究生参与开放实验室管理与建设探讨

高校开放实验室能加强学生实践能力和创新能力的锻炼,适应我国人才培养的需求。文中指出了目前制约我国高校开放实验室建设的主要障碍因素,借鉴国外开放实验室管理经验,探讨了研究生参与高校开放实验室建设与管理的作用和意义以及注意事项,以期对我国开放实验室建设和研究生培养提供启示作用。