查询词典 calculus of approximations

Expressing constraints by logic formulae, we can reason the other constrains of system through logic calculus.

遵循SOP方法学原则，我们设计了抽象数据定义语言ADL和过程控制语言PCL。

It introduces the basic knowledge and ideas of mathematical logic and classic set theory, including proposition logic and predicate logic, reasoning calculus and theorem proving methods, basic operations and properties of sets and relations, functions of any sets and their properties, the cardinals of infinite sets, and the applications of knowledge and ideas above in computer sciences.

本课程系统介绍数理逻辑与朴素集合论的基础知识，包括：命题逻辑和谓词逻辑、定理的推理演算和机器证明方法，集合和二元关系的基本运算和性质、任意集合中的函数及其性质，无穷集合的基数，以及上述知识在计算机科学中的应用。

British mathematician and logician who developed a calculus of symbolic logic.

布尔，乔治1815－1864英国数学家和逻辑学家，建立了一种符号逻辑的演算法

Elementary logic and Algebra Propositional calculus, quantifiers.

初等逻辑和代数命题演算，量词。

We first introduce the state of the art of Web Services Composition, and then analyze the relation between Web Service Composition and related theoretical backgrounds. Concerning the two key technologies, service composition method and service composition system, we demonstrate our work.1. Based on semantic Web Service and OWL-S specification, a first-order logic Situation Calculus planning method for services composition is introduced.

本文首先对现有的服务组合相关工作做了比较详细的阐述，在分析了语义Web服务自动组合所涉及的主要理论背景之间的关系和作用之后，针对我们所关注的两个主要技术层面——服务组合方法和服务组合系统阐述了我们的工作： 1、在语义Web服务规范OWL-S的基础上，研究通过一阶逻辑状态演算来规划组合服务的方法。

Therefore, some these fields are thoroughly investigated in this dissertation, which are respectively mentioned as the following: 1. The Formal Description Language ISITL for Intrusion Signatures ISITL is a high-abstractive formal description language for representing intrusion signatures based on the interval temporal logic and first-order predicate calculus.

本论文对此展开了全面深入的研究，其内容主要包括： 1、基于时段时态逻辑和一阶谓词逻辑的入侵特征形式化描述语言ISITL ISITL克服了以往检测语言以"情景描述"为主的缺陷，转而采用形式化的方法来刻画入侵模式的入侵特征。

Fuzzy logic ; proposition calculus ; accessible α+ tautology ;α contradiction ; upgrade algorithm ; partition

模糊逻辑；命题演算；可达α~+-重言式；α-矛盾式；升级算法；分划

This thesis studies the constructing and running processes of the virtual enterprise and proposes the virtual enterprise ontology oriented to the process modeling. It also represents the process model decomposed hierarchically described by logic situation calculus based on the virtual enterprise ontology and presents the corresponding organization model decomposed hierarchically for the virtual enterprise in the dynamic allying process.

本文主要通过对虚拟企业的结盟、构建和运作过程的深入研究，提出了面向过程建模的虚拟企业本体论，并在该本体论基础上，以逻辑情景演算形式化地描述了虚拟企业在结盟过程中逐步精化的过程模型，并建立了相应的虚拟企业分层递解组织模型。

In the meantime, we also can change the status of the logic situations and describe the allying process and cooperative process. In addition, we represent the virtual enterprise ontology in the formal logic situation calculus and can define the core elements more accurately. It maintains the consistency and integrality of the ontology. Accordingly, the process model based on the ontology will have strong reusability, accessibility and consistency.

相应地，我们可通过逻辑情景演算这种形式化逻辑框架来表示虚拟企业本体论，以支持虚拟企业本体论中核心术语的更精确定义，维持其一致性和完整性；进而，构建于该本体论之上的虚拟企业过程模型就具有很强的重用性和可访问性，并能够保持建模过程的一致性。

The three states are transformed via two-dimension liquid crystal element and polarizators, and ternary arithmetic operation and ternary logic al calculus completed directly in this way.

三值光计算机用相互垂直的两个线偏振光和零光强三个独立的光状态表示信息；用二维液晶器件和偏振器实现此三个状态间的转换；采用三进制算术运算；直接处理三值逻辑运算；拥有巨大的数据位数(容易超过10~4位)；具有光运算、光传送、电控制等结构特色，具有很强的空间、时间并行性。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。