基于物相与成分分析的中药炉甘石基源研究

通过对56批炉甘石样品的物相与成分分析,为增补水锌矿作为炉甘石基源矿物提供了依据。电子探针微区分析表明:炉甘石是一种复杂的矿物集合体,由水锌矿、菱锌矿、异极矿、白云石、方解石等多种散在共生的微小矿物颗粒共同构成;红外光谱结构分析的结果显示:市售炉甘石的主流矿物为水锌矿。炉甘石药用均为煅烧后入药,作为炉甘石基源的水锌矿与菱锌矿,经炮制后其化学成分均转变为氧化锌,两者化学本质相同。故在保证原矿品质的前提下,两者可共同作为炉甘石的基源矿物。     

Design of solids for antigravity motion illusion

This paper presents a method for designing solid shapes containing slopes where orientation appears opposite to the actual orientation when observed from a unique vantage viewpoint. The resulting solids generate a new type of visual illusion, which we call “impossible motion”, in which balls placed on the slopes appear to roll uphill thereby defying the law of gravity. This is possible because a single retinal image lacks depth information and human visual perception tries to interpret images as the most familiar shape even though there are infinitely many possible interpretations. We specify the set of all possible solids represented by a single picture as the solution set of a system of equations and inequalities, and then relax the constraints in such a way that the antigravity slopes can be reconstructed. We present this design procedure with examples.     

Unsteady CFD computations using vertex‐centered finite volumes for unstructured grids on Graphics Processing Units

This paper presents a Navier–Stokes solver for steady and unsteady turbulent flows on unstructured/hybrid grids, with triangular and quadrilateral elements, which was implemented to run on Graphics Processing Units (GPUs). The paper focuses on programming issues for efficiently porting the CPU code to the GPU, using the CUDA language. Compared with cell‐centered schemes, the use of a vertex‐centered finite volume scheme on unstructured grids increases the programming complexity since the number of nodes connected by edge to any other node might vary a lot. Thus, delicate GPU memory handling is absolutely necessary in order to maximize the speed‐up of the GPU implementation with respect to the Fortran code running on a single CPU core. The developed GPU‐enabled code is used to numerically study steady and unsteady flows around the supercritical airfoil OAT15A, by laying emphasis on the transonic buffet phenomenon. The computations were carried out on NVIDIA's Ge‐Force GTX 285 graphics cards and speed‐ups up to ～46 × (on a single GPU, with double precision arithmetic) are reported. Copyright © 2010 John Wiley & Sons, Ltd.     

Flexible electronics: Prediction of substrate deformation during different steps of the lithography process

A numerical model was developed to simulate the micro-deformations of a polymeric substrate due to lithographic processing of different layers of a transistor-like structure. The results of the model were validated with the results from experiments. The model, a mechanical-thermal-hygroscopic model, takes into account the dimensional effects of temperature, moisture and stresses. It also includes the temperature dependent visco-elastic behaviour of the polymer substrate. The model can be used to predict overlay accuracies between different functional layers introduced by the lithographic process. It can also be used to understand the underlying processes such that it provides a tool to improve the overlay accuracy during actual processing.     

Metal Ionically-controlled Optical Signaling Based on a Chromoionophore-derived Calix[4]crown

A chromoionophore-derived calix[4]crown, 1 , possessing an effective signal-controllable function by metal ionic inputs has been newly synthesized, whose function is mainly of our interest, by transforming the process of receptor activation to one that may be detected by an optical signal (i.e. color change), the basic feature of antagonist-agonist competition may be reproduced readily and visually detected. The process would be particularly new within the field of optical read-out receptors. Further, from the standpoint of material sciences, the controllable signal function may not only be welcome for molecular information processing, but also contribute to the design of new sensory materials.     

电视播控管理系统的设计与开发

从播控管理系统的需求分析入手,构建了系统各功能模块,建立数据库,对系统登录、用户权限管理、播控资源管理等模块做了分析与设计。系统对播控信息数据进行统一管理,完成了信息的收集、统计、汇总和分析等功能,实现了对电视播控事务科学、高效的管理。     

用VB模拟分析加速度为简谐函数的质点运动

用Visual Basic实现了加速度为简谐函数的质点的a-t,v-t,y-t图线的计算机描绘,通过运行程序,可以让我们直观理解加速度为正弦函数的质点的运动.     

X86处理器保护技术在可视调度系统高可靠性设计中的应用

可视调度系统是一个很复杂的软件体系，不可避免地存在各种各样的错误和缺陷。普通的调试工具只能在开发阶段用调试版本来解决故障，为了提高可视调度系统的可靠性和容错性，有效地发现和处理发布版本的在线故障是非常有必要的。本文探讨了IntelX86处理器在可视调度系统中的在线异常处理技术，并针对该异常处理模型详细阐述了异常处理的现场保存、现场分析、异常恢复等策略的实现。     

Hierarchical and conditional combination of belief functions induced by visual tracking

In visual tracking, sources of information are often disrupted and deliver imprecise or unreliable data leading to major data fusion issues. In the Dempster-Shafer framework, such issues can be addressed by attempting to design robust combination rules. Instead of introducing another rule, we propose to use existing ones as part of a hierarchical and conditional combination scheme. The sources are represented by mass functions which are analysed and labelled regarding unreliability and imprecision. This conditional step divides the problem into specific sub-problems. In each of these sub-problems, the number of constraints is reduced and an appropriate rule is selected and applied. Two functions are thus obtained and analysed, allowing another rule to be chosen for a second (and final) fusion level. This approach provides a fast and robust way to combine disrupted sources using contextual information brought by a particle filter. Our experiments demonstrate its efficiency on several visual tracking situations.     

测控系统测轨数据的时间校正问题

本文分析了航天测控系统几类测轨数据的时间校正问题及相应的校正计算方法,指出在同一系统时标形成的测轨数据不一定是同一时的目标参数,提出了使各测轨数据同步的一种方案.