Velocity Distribution of Slurry in Horizontal Pipe When Solid Particles Sliding

Based on the laws of momentum conservation and impulse in accelerating process, the distribution on speed of ununiform slurry flow in a horizontal pipe was studied. According to the momentum change of solid particles and conveying liquid of slurry flow during accelerating, and some effect factors, the relationship between the speed of solid particles and the speed of conveying liquid was obtained.When dealing with the friction between sliding solid particles and pipe, it is pivotal to reasonably distribute component of friction to each solid particle. The friction coefficient between solid particles was obtained by forces analysis and theoretic calculation, and can be used to calculate the friction force on every solid particle. The effect of friction on speed of ever), solid particle was investigated through the impulse law. The result is more accurate than that by using uniform friction on solid particles. It is completely new method to use above theory to get solid particles speed distribution, conveying liquid speed distribution and slurry speed distribution.     

Research ＆ Development of Grade X70 LSAW Steel Pipes for West-East Gas Pipeline

In this article the research and development of X70 large diameter longitudinal seam submerged arc welded (LSAW) steel pipes for West-East Gas Transportation Pipeline project (WEGTP) in China are introduced, including the key technique, fabrication of pipe production line, mass production and the latest progress of LSAW steel pipe technique.     

Study and Application of Internal Coating Technique to Drag Reduction of the Trunk Pipeline for the West-East Gas Pipeline

Coverage layer coated in the internal wall of pipeline enables the friction drag to be reduced, the throughput and the gas transmission efficiency to be increased, the frequency of pigging and the number of the intermediate compressor station to be reduced, and the power consumption of the compressor to be decreased etc. The drag reduction is a high advanced scientific technique with outstanding economical benefit. The study and application of internal coating technique for drag reduction of 4000km trunk pipeline in West-East gas transmission pipeline (WEGTP) project are described, in which the main points are the drag reduction principle, coating process and the indoor study of this technique with own-decided knowledge property right at home.     

Research and Application of All-Position Automatic Welding Machine

The all-position automatic welding machine system is the special welding system for pipeline girth automatic welding on site, which has been widely used in the long distance pipeline construction projects due to the advantages of automatic control for welding parameters at all position, moving speed of bugs and operating. This automatic pipeline welding system has been successfully used in several main pipeline projects in China, and has been approved by the constructors with the benefits of higher quality passing rate, higher welding efficiency and lower labor intensity.     

基于多Agent的RoboCup仿真足球比赛通信

足球机器人比赛系统需要机器人团队的合作 .但RoboCup仿真组比赛所提供的通信系统模型是一个低带宽、不可靠通信系统 .为了更好的利用这有限的通信能力 ,提出了对应的解决通信问题的方法 .最后举例说明了若干个在团队合作中使用通信系统的应用 .     

灰色斜率关联度的改进

研究了单指标数据序列的几种无量纲化变换及其性质，提出了一种对灰色斜率关联度的改进模型，改进后的关联度能够反映序列的正、负相关关系，并且对原始序列进行无量纲化变换处理时不影响关联系数及关联度的值，还研究了改进的关联度及关联系数的性质。该方法充分利用了序列各时点的信息及正、负相关性，所得关联分析结果较为客观可靠，并且易于在计算机上实现。     

类差分平衡函数的性质及其应用

定义了布尔函数的类差分和类差分平衡函数，研究了类差分平衡函数的密码学性质以及构造方法。作为类差分平衡函数的应用， 给出了Z24上逻辑函数是完全非线性函数的充要条件，并在首先分析得到所有四元类差分平衡函数的基础上，编程搜索出Z24上所有的完全非线性函数。     

深圳城市供水系统产权结构重组模式及评价

提出了城市供水系统产权结构重组的两种基本模式，运用制度经济学和管理学理论，提出产权结构模式评价的指标与方法，分析了这两种产权结构模式的特性和在这两种模式下不同利益主体的行为与利益关系的变化特点及优缺点，并提出了缓解劣势的手段与方法。     

铝电解用Fe-Ni-Co-Al-2O3金属陶瓷惰性阳极

研制了一种新型铝电解金属陶瓷惰性阳极，阳极基体由Fe-Ni-CoAl2O3构成。在石墨坩埚中，960℃温度下，电解质中的氧化铝质量分数为60%，摩尔比为26；阳极电流密度为10 A/cm2，阳极尺寸大小为120 mm×80 mm×15 mm，石墨阴极尺寸大小为120 mm×40 mm×20 mm，通入的直流电为100～300 A，电解时间各为10 h；实验所得的电解铝产品纯度达到98%以上，杂质主要为Fe，Ni，Co；电解后的阳极外观尺寸无明显变化，阳极气体中氧气质量分数达到98%～99%。阳极的反电动势为245 V，比理论分解电压仅高出025 V证明该阳极为惰性阳极，在电解槽中进行的是Al2O3的分解反应。     

基于频域的多变量广义预测控制（MIMO-GPC）稳定性分析

提出了基于频域的多变量广义预测控制（MIMO-GPC）稳定性分析方法，推导了MIMO-GPC的闭环反馈结构，给出了基于闭环特征多项式的MIMO-GPC的稳定性判据和奈奎斯特稳定性判据。这些判据可作为MIMO-GPC控制器参数设计的重要依据。