循环理论

In this paper, thermodynamics analysis of ADAR cycle was made.

对该循环进行理论分析和热力计算，并对循环的关键步骤低压发生过程进行实验。

The theoretical analysis of the work cycle is made for the pressed air engine and liquid nitrogen engine.

从理论分析的角度，对压缩空气发动机和液氮发动机的工作循环进行了分析讨论，采用不同概念计算了两者的可用能，并着重分析了膨胀初始压力和温度对输出功的影响，还探讨了液氮发动机工作循环的优化途径。

For lack of historical practice analysis and rethinking of the past urban design execution, the benignant recycle will not evolve, which theory directs practice and practice feeds back to theory.

由于缺少对现有城市设计实施的历史经验性评判与反思，无法形成理论指导实践、实践又反馈理论的良性循环，城市设计的理论研究方法以及整体运作体系难以脱开局限性的探讨，无法实现质的改善和突破。

This article is divided into three parts:I: It gives the relevant background knowledge, mainly about the study of circulant matrices at home and abroad, the basic concepts, characteristics of circulant matrices, and the basic computing instruments which have been frequently used in matrix theory and matrix calculations.

本文共分三个部分：一：给出相关的预备知识，主要是循环矩阵研究的国内外现状和进展、文中用到的循环矩阵的基本概念、性质以及在矩阵理论和矩阵计算中经常用到基本运算工具。

To conquer limitations of existing techniques for developing loop invariants, professor Xue Jinyun, who is imbursed under two National Nature Science Foundation of China, systematically research the theory and method of loop invariants and advanced the new definition and developing strategies for loop invariants. Based on above, he presented efficiency method of developing algorithmic program, Partition-and-Recur Approach, and its developing environment which bring into important play in formal method.

为了克服已有循环不变式开发技术存在的局限性，薛锦云教授在两个国家自然科学基金课题&若干新的算法程序设计和证明方法研究&和&实用的软件形式化方法及其开发工具的研究&的资助下，对循环不变式的理论和方法进行了系统的研究，提出了关于循环不变式的新定义和新的开发策略，并在此基础上形成了一种实用的算法程序形式化开发方法及其开发环境，在复杂算法程序及软件形式化开发中发挥了重要作用。

Although these three systems are innovational, these have their theory origin. Especially, man-made scale of non-octave cycles breaks the structure of traditional scale and the limitation of octave cycles to be man-made scale. But it still keeps the characteristic of circulation cycle as the same of the traditional scale to be the sister of the traditional scale.

这三种创作手法虽然具有创新性，但都有其理论渊源，尤其是&非八度循环周期人工音阶&，首先突破了传统音阶的结构而成为&人工音阶&，进而突破了八度循环周期的限制，但仍然保持了与传统音阶相同的&有循环周期&的特性，成为了传统音阶的&姐妹&。

Form the theory to say, if we inspect things well, controllable circulatory ventilation can bring enough fresh air to circulatory places so that coal mine can produce safely. We study the coalface 66 in Jingting coal mine.

从理论上讲，应用可控循环通风，只要监测监控措施得力，保证有足够的新鲜风量进入循环区域，则可保证在可控循环通风情况下，矿井的安全生产。

Based on the index weight indicators and benchmarks,the paper discusses the design principles and ideas of establishing evaluation index system for recycling economy,establishes evaluation index calculation method of cleaner production in aluminum industrial enterprises in order to reach the following indic...

从确定指标权重以及指标基准值的角度入手，探讨了循环经济评价指标体系的设计原则、构建思路；给出了铝工业企业清洁生产评价指标的考核评分的计算方法，得出了铝行业企业的生产系统评价指数、企业综合评价指数；构建了电解铝行业循环经济的评价指标体系，并详细分析每个指标，为铝行业发展循环经济提供了参考依据和理论借鉴。

The main research work of this dissertation is as follows: Based on the chemical reaction engineering theory and the nitrobenzene electroreduction mechanism, the plate and frame electrolyzer was designed and applied to the process of electroreduction nitrobenzene to p-aminophenol. This dissertation measured the residence time distribution data of the electrolyzer by means of the pulse response method and studied the rule of flow pattern along with the current capacity change. Under different conditions ,this dissertation studied the cyclic voltammetry properties of nitrobenzene on different electrodes by means of the dynamic cyclic voltammetry method and the electrode materials applied to the NB electroreduction have been selected primarily.Baseed on the results of cyclic voltammetry tests, this dissertation used p-electrode systems to measure the steady-state- polarization curves of nitrobenzene on different electrodes in H-type diaphragm cell, and obtained each primary factor s influence rule and the exchange current density value of each electrode.And then on the basis of the conclusions of fundamental researchs upword, the effects of influence factors on the the yield of p-aminophenol and the current efficiency,such as electrode material, current density, quantity of electricity circulated, nitrobenzene concentration . sulpuric acid concentration and so on, have been studied in detail in the systems of hign temperature , strong acidity and oxygen-poorthrough a series of electrolysis experiments in this paper.After all using Pb as anode Monel metal as cathode Dupont Nafion 417 cation-exchange membrane as membrane, this dissertation obtained the optimum technological condition: reaction temperature about 85C, current density 500A m-2, sulphuric acid concentration 20%wt.

论文的主要研究工作为：运用化学反应工程理论，结合硝基苯的电还原机理，设计出用于硝基苯直接电还原合成对氨基苯酚实验的板框式电解槽，并利用脉冲响应法测定了该板框式电解槽的停留时间分布数据，研究了流型随流量变化的规律；通过动态循环伏安法研究了硝基苯在不同电极上、不同条件下的循环伏安特性，初步评选出了用于硝基苯电还原的电极材料；结合循环伏安的测定结果，在H型隔膜电解槽中采用三电极体系测定了硝基苯在不同电极上、不同条件下的稳态极化曲线，得到了各主要因素的影响规律及硝基苯在各个电极上电还原的交换电流密度数值；在基础研究结论指导下，采用板框式电解槽，在高温、强酸、贫氧系统中，进行了一系列的电解实验，分别考察了电极材料、电流密度、通电量、硝基苯浓度、硫酸浓度等因素对收率及电流效率的影响，最终选择以蒙乃尔合金电极作为阴极、铅合金为阳极、Dupont Nofion 417阳离子交换膜为隔膜，得到由硝基苯直接电还原制对氨基苯酚的最佳电解工艺条件：反应温度85℃，电流密度500A·m~(-2)，硫酸浓度20％wt。

On the research, firstly the principle of market forecasting and the strategy model of M.E.

应用了市场预测原理和波特战略模型等进行了运营环境研究，应用了货币时间价值理论对财务效益进行了研究，应用了盈亏平衡和敏感性分析理论对抗风险能力进行了研究，应用了可持续发展、循环经济等理论对可持续性发展能力进行了研究，应用了加法模型对项目的综合分析评价进行了研究。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。