Monitoring the run-time activity of algol 68-R programs

A program profiling system for the language Algol 68-R is described. The system provides deterministic information concerning the run-time behaviour of certain Algol language constructs. This is accomplished by preprocessing program texts prior to compilation using a syntax analyzer for Algol 68-R.     

Multiresolution morphing for planar curves

We present a multiresolution morphing algorithm using ``as-rigid-as-possible' shape interpolation combined with an angle-length based multiresolution decomposition of simple 2D piecewise curves. This novel multiresolution representation is defined intrinsically and has the advantage that the details' orientation follows any deformation naturally. The multiresolution morphing algorithm consists of transforming separately the coarse and detail coefficients of the multiresolution decomposition. Thus all LoD (level of detail) applications like LoD display, compression, LoD editing etc. can be applied directly to all morphs without any extra computation. Furthermore, the algorithm can robustly morph between very large size polygons with many local details as illustrated in numerous figures. The intermediate morphs behave natural and least-distorting due to the particular intrinsic multiresolution representation.     

MC68CH908QL4在LIN从机系统中的应用

LIN(局部互联网络)是汽车通讯网络中的一种协议标准,简单易行,功能强大,成本低廉。在不要求高传输带宽的情况下,它可以取代成本为其2～3倍的CAN总线网络,并且它还能应用到许多工业控制领域,有很好的发展前景。本文主要介绍了最新的增强型LIN微控制器MC68HC908QL4在LIN总线从机节点上的应用,以及其相比一般UART设备的优势。     

Efficient Collision Detection for Moving Ellipsoids Using Separating Planes

We present a simple, accurate and efficient algorithm for collision detection among moving ellipsoids. Its efficiency is attributed to two results: (i) a simple algebraic test for the separation of two ellipsoids, and (ii) an efficient method for constructing a separating plane between two disjoint ellipsoids. Inter-frame coherence is exploited by using the separating plane to reduce collision detection to simpler subproblems of testing for collision between the plane and each of the ellipsoids. Compared with previous algorithms (such as the GJK method) which employ polygonal approximation of ellipsoids, our algorithm demonstrates comparable computing speed and much higher accuracy.     

Space-efficient recognition of sparse self-reducible languages

Mahaney and others have shown that sparse self-reducible sets have time-efficient algorithms, and have concluded that it is unlikely that NP has sparse complete sets. Mahaney's work, intuition, and a 1978 conjecture of Hartmanis notwithstanding, nothing has been known about the density of complete sets for feasible classes until now. This paper shows that sparse self-reducible sets have space-efficient algorithms, and in many cases, even have time-space-efficient algorithms. We conclude that NL, NC ^k , AC ^k , LOG(DCFL), LOG(CFL), and P lack complete (or even Turing-hard) sets of low density unless implausible complexity class inclusions hold. In particular, if NL (respectively P, _k , or NP) has a polylog-sparse logspace-hard set, then NLSC (respectively PSC, _k , or PHSC), and if P has subpolynomially sparse logspace-hard sets, then PPSPACE.     

金属正电子核素~(64)Cu,~(68)Ga,~(86)Y和~(89)Zr的PET标记药物研究进展

~(64)Cu,~(68)Ga,~(86)Y和~(89)Zr具备不同的半衰期和特殊生物体内性质,丰富了PET药物的多样性,为疾病的诊断和治疗提供了新的契机。近年来,金属正电子核素~(64)Cu,~(68)Ga,~(86)Y和~(89)Zr标记的药物在正电子发射计算机断层显像(PET)诊断中的应用越来越多,~(64)Cu在乏氧显像中发挥重要作用,~(68)Ga在靶向神经内分泌(NET)类肿瘤的诊断药物领域发展迅速,~(86)Y,~(89)Zr有望在免疫PET和放射免疫治疗领域发挥作用。本文主要综述金属正电子核素~(64)Cu,~(68)Ga,~(86)Y,~(89)Zr的生产与纯化,溶液配位化学以及应用方面的研究进展。     

PC机与MC68HC908JB8的USB通讯

USB作为一种应用在PC领域的新型接口技术，因其具有即插即用、热插拔、使用方便、独立供电等特性，目前已得到广泛应用。本文详细介绍了如何实现PC机与MC68HC908JB8之间进行USB通讯，并给出硬件和软件实现方法。     

Win9x环境下无线数传模块SA68D11串口通讯软件设计

介绍了无线数传模块SA68D11的RS232通讯协议，详细说明了Delphi的ActiveX通讯组件Spcomm的属性、方法、事件。通过实例对利用Spcomm通讯组件进行SA68D11串口通讯的设计方法进行了详细讨论，并最终实现了Win9x环境下PC与无线数传模块SA68D11的串口通讯控制。     

一种适用于多个不同品牌小型PLC的链接系统设计

中小企业的旧设备上存在多个不同品牌的小型PLC,而各品牌PLC的通信互不开放.针对设备改造中PLC扩展的需要,基于各品牌PLC自带的编程口通信协议,设计一可供多个不同品牌的小型PLC通信的通用链接系统,并以Freescale的MC68HC908GZ60 微控制器为核心芯片实现.在基本不改变设备硬件现状的情况下,经济地实现改造目标.