基于XYZ／E的CA认证系统描述与求精

时序逻辑语言XYZ／E在统一的逻辑框架下既能表示静态语义又能表示动态语义，可以实现从抽象描述到可执行程序的平滑过渡。本文建立了CA认证系统组件求精模型，对CA和RA组件用XYZ／E进行了描述和求精。     

基于线性时序逻辑的实时系统建模与求精

线性时序逻辑语言XYZ／E在统一的语义框架下．能表示从高层需求规范到低层实现模型之间的不同抽象层次的系统描述，也适于描述实时系统的模型和逐步求精过程．本文提出了一种基于构件的实时系统求精方法，并给出一个具体实例一电梯控制系统，采用XYZ／E语言描述了该系统的模型及其求精过程．     

XYZ/E在CA认证系统的一个初步应用

时序逻辑语言XYZ/E在统一的逻辑框架下既能表示静态语义又能表示动态语义,支持软件体系结构从高层到低层的逐步过渡。该文建立了CA认证系统组件模型,采用基于组件的逐步求精方法,用XYZ/E描述了CA认证系统的体系结构。     

The Power of Logic Versus the Logic of Power: N55

Ion Sørvin , the founder of experimental Danish practice N55, describes two projects devised to challenge and critique the current economic, social and political conventions: one for open-source manuals to create everyday items, such as modular bed systems, a hygiene system and a micro-home, that highlight how commercial products define and circumscribe everyday social interactions; and another for a collective masterplan that challenges the power base of private land ownership.     

Parallel-kinematics XYZ MEMS part 1: Kinematics and design for fabrication

Micro- and nanopositioning systems are widely used in the field of nanotechnology for probing, imaging, and increasingly for processing. This two-part set of papers presents a MEMS-scale parallel-kinematics mechanism, designed to achieve pure spatial (X, Y and Z) translation. With three independent kinematic chains connecting the end-effector to the base, a fully functional mechanism with axis actuation and displacement sensing is realized in a double device layer (“oreo”) SOI wafer using only conventional, microfabrication processes. This paper, the first in a two paper set, presents the mechanism, specially designed for scalable microfabrication. It analyzes its kinematics and dynamics, and characterizes its workspace. Part II of this set of papers describes the detailed design, fabrication, characterization and control of the devices.     

Parallel-kinematics XYZ MEMS part 2: Fabrication and experimental characterization

This paper, the second of a set of two papers addressing parallel-kinematics MEMS stages for spatial translation, deals with fabrication, characterization and control of such devices. Double device layer SOI (silicon-on-insulator) substrates are used, providing three layers (two device layers and the handle) into which the elements of the stage can be mapped. Using the mechanism concept, realization scheme, and kinematic and dynamic models developed in the first paper of this set, this paper provides a detailed approach to fabricating these devices. The stages fabricated have a workspace cube of roughly 20 μm on the side, an in-plane stiffness of 96 N/m, and an out-of-plane stiffness of 166 N/m. Further, it characterizes the performance of the individual actuating and sensing elements, configures feedback controllers for each actuated joint, and assesses and verifies the stage’s designed performance. Finally, it demonstrates full 3-axis, closed-loop positioning of a MEMS stage.     

XYZ／SE程序的验证

ＸＹＺ／Ｅ的好处之一在于高级和低级的说明能够在同一框架下表示，因而使得软件的说明和实现变得容易一些．在这同时，开发验证工具以验证不同层次的说明是否满足所期望的关系是很重要的．谢洪亮等同志曾研究过ＸＹＺ／ＳＥ程序的验证规则．本篇文章增加了有关使用数组、过程说明和过程调用的规则．同时着重说明ＸＹＺ／ＳＥ程序验证的自动化方面的问题，且实现了一些化简验证条件的规则．     

基于XYZ/ADL的网络中心化仿真运行支撑平台体系结构形式化描述

网络中心化仿真运行支撑平台体系结构是为了满足动态构建仿真任务共同体而提出的相应支撑环境。采用基于XYZ/ADL的双重软件体系结构描述框架,分别从图形语言和形式语言对仿真运行支撑平台体系结构进行了描述并对仿真任务共同体构建中仿真核心服务层实施了分解与逐步求精。该体系结构描述方法不但从可视化角度表示了仿真运行支撑平台体系结构框图及行为抽象,还从形式化角度验证了体系结构设计的正确性和完整性。该研究是形式化描述方法在军事领域的全新尝试,为仿真运行支撑平台服务的合成与重用机制提供了形式化的理论指导。     

基于XYZ/ADL的电梯控制系统体系结构的描述与求精

研究软件体系结构的首要问题是如何描述体系结构模型;运用XYZ/ADL描述软件体系结构模型,可以在统一时序逻辑框架下描述系统静态语义到实现之间不同抽象层次的规范,便于体系结构的逐步求精及相关性质分析;以电梯控制系统为例,运用XYZ/ADL形式化地描述了系统体系结构的风格、静态模型和动态模型,并对体系结构模型的主要组件进行了逐步求精,使系统的体系结构从最初的总体功能规范平滑地过渡到了最终的可执行程序;研究表明:形式化描述语言XYZ/ADL在实时控制系统的开发中有着重要的实践意义。     

一种基于时序逻辑语言的实时售票系统描述与精化方法

时序逻辑语言XYZ/E在统一的形式框架下既能表示静态语义又能表示动态语义,可以实现从抽象描述到可执行程序的平滑过渡.分析了邮政汽车票售票系统的实时性,给出了该系统的组件模型,用XYz/E描述了整个软件系统的体系结构,逐步精化了核心组件PCServer、PDClient、PSCli-ent,实现了功能组件PSSConllout1和PSSComput2到可执行程序XYZ/E的平滑过渡.