压缩机制冷量测试系统冷凝器的动态分布模型

提出了描述小型压缩机制冷量测试系统中冷凝器的瞬态行为的数学模型。该模型应用热动力学观点和方法，基于能量、质量和动量守恒，由七个动态的、分布参数的微分方程组成。该模型是优化测试系统冷凝器设计和研究测试工况控制策略的基础。实验表明；模型和实验结果具有一致的变化趋势。     

Principal Rings and their Invariant Factors

In this article we put forward a new look at the theory of principal and Invariant-Factor rings, with a view toward facilitating the formalization, automation, and archiving of results and their proofs. We take an elementary and constructive approach: standard techniques such as prime ideals and factorization of elements are avoided, and determinant constructions are minimized. Using such computationally friendly methods, the main existence and uniqueness results on invariant factors for a f.g. torsion module are derived, and several new algebraic constructions and results are found. The lattice of principal integral ideals for any commutative Bézoutian ring is explicitly constructed based on a first-order proof overlooked in the literature, together with a proof that this lattice is distributive. A Lagrange quotient theorem for finitely generated modules over any principal ring is stated for the first time. A very constructive new proof is given that a principal ring has the Hermite property, so is also an Invariant-Factor ring. A calculus that is needed in the ideal lattice, naturally yields a number of formulas valid for a function lattice.     

Creating Integrative Solutions in Conflict Episodes

This article analyzes the conflict management literature and presents an operational enhancement to the construction of an integrative solution during a conflict episode. It does this by redefining stakeholder aims and/or belief systems with respect to a conflict.     

ANALYSIS OF COAL DISSOLUTION REACTION ENGINEERING

A phenomenological approach was developed for conversion of coal to pyridine soluble materials with the object of shedding additional light on the reactions taking place during short contact times. The approach was based on a theoretical analysis of many parallel reactions in a complex reacting mixture. The analysis used the concept of lumped species and weighted activation energies to improve on coal liquefaction models. i.e. to remove insensitivity problems for parameters in coal liquefaction models and to answer questions about behaviour of liquefaction reactions in different vessels.     

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东营凹陷是一个含油气十分丰富的箕状断陷凹陷。３０多年的勘探成果表明，该凹陷有着多种类型的天然气藏，既有原生的纯气藏，也有与石油伴生的气顶气藏。各种类型的天然气藏气体成分不同，高ＣＯ２气藏和高ＣＨ４气藏是两种基本类型。凹陷内绝大部分气藏属于高ＣＨ４气藏、少数为高ＣＯ２气藏。平方王气藏是凹陷内最大的高含ＣＯ２的气藏，其ＣＯ２气是无机成因的，且地层本身具备无机生成ＣＯ２的四个基本条件，ＣＯ２的形成是碳酸盐岩热分解和高温淋滤作用的结果。目前在东营凹陷已发现的含气层系有１０套，多分布在６２８．６～１８４８．０ｍ深度范围内；其次，气藏在平面上则出现围绕沉积凹陷环带状分布的显著特点，靠近凹陷中心为油藏中的溶解气，而靠近边缘隆起带或凸起带是纯气藏聚集区，位于二者之间的则是油藏顶部的气顶气。上述天然气藏的分布规律除了受凹陷内油气运移总趋势的控制之外，更主要的是受聚集部位地层温度高低和地层压力大小所制约。     

分配网络中的反向入侵噪声及其防范措施

从实践的角度,分析分配网络中入侵噪声进入反向回路的主要途径,并提出防范措施.     

高炉鼓风机组监控系统

介绍了高炉风饥的计算机监控系统，讨论了基于８９３智能装置的分布分散式监控系统在高炉风机生产控制过程中的应用，着重介绍监控系统的结构、功能及应用软件编程。     

A MODEL OF MIXING IN A MOTIONLESS MIXER

This paper deals with the modelling of a Sulzer-Koch motionless mixer. A flow model involving convection and diffusion has been solved to characterize the dispersive mixing in one node of the network and this result was then complemented by a network analysis to obtain the flow distribution. Experimental data are in general agreement with the theory. The approach of this study is shown to provide valuable conclusions about the design of the mixer and to complement the more commonly used integral or statistical treatments. In particular, it has been shown that the ratio of internal resistances controls the distributive mixing in one mixer unit and that significant convective mass transport takes place within the node even when there is no net cross-flow.     

对策论在企业破产问题中的应用

本文研究企业破产问题,利用论方法讨论破产企业的财产分配方式,给出了顺序比例规则,在一定条件下,得到３人破产对策的Ｃ－值,σ－值,Ａｐ规则一致。     

Melt-mixing by novel pitched-tip kneading disks in a co-rotating twin-screw extruder

Melt-mixing in twin-screw extruders is a key process in the development of polymer composites. Quantifying the mixing performance of kneading elements based on their internal physical processes is a challenging problem. We discuss melt-mixing by novel kneading elements called “pitched-tip kneading disk (ptKD)”. The disk-stagger angle and tip angle are the main geometric parameters of the ptKDs. We investigated four typical arrangements of the ptKDs, which are forward and backward disk-staggers combined with forward and backward tips. Numerical simulations under a certain feed rate and screw revolution speed were performed, and the mixing process was investigated using Lagrangian statistics. It was found that the four types had different mixing characteristics, and their mixing processes were explained by the coupling effect of drag flow with the disk staggering and pitched-tip and pressure flows, which are controlled by operational conditions. The use of a pitched-tip effectively controls the balance of the pressurization and mixing ability.