1991 volumne 12卷 Issue 04
Wu Yanxiang;
Abstract: This article is a test research on the characteristics of waves after the water leap. The test was performed in a 40 -centimeter flat bottom sink. Through the analysis of the measured data, the maximum high -rise expression after leap is given. After discussing the physical mechanism of the post -leap fluctuations, the measurement of the wave along the waves after leaps was measured, and the waveforms, wave cycles, and spectrum were analyzed, and preliminary discussions were conducted in the anti -wave measures.
He North; Shi Bin; Luo Guanying;
Abstract: For the characteristics of comprehensive use of the reservoir, this article has established a Markov decision planning model for the optimized scheduling of the reservoir. The article discusses the principles and methods of strategy iteration, and explores the application of the strategy iteration method.
Ji Kui; Liu Wenli;
Abstract: This article recommends the critical length formula of the tailwater tunnel, and compares and demonstrates it with relevant domestic and foreign formulas. It is believed that the domestic formulas in China are conservative. It is recommended to replace the tailwater pressure adjustment room by replenishment, and derives the calculation method of the amount of gas supplement and the ventilation holes.
Li Jie;
Abstract: On the basis of the literature [1], this article first discusses the three basic simulation parameters, and then uses the bottom shear method and considering only the first vibration -type reaction spectrum method as the basic tool, which prevters the system simulation parameters of the five common (structure) buildings.
Xu Qilou; Sun Zengshou;
Abstract: This article is based on the yield strength coefficient between layers, and considering the characteristics of the coal bay structure, proposes the predictive predictive method of square coal -to -day vibration damage, and prepares the corresponding computer program. The actual structural shock prediction results and historical shocking data comparison show the credibility of this method.
Song Jianxue; Li Jie;
Abstract: This article proposes the "simplified mode method" of brick chimney vibration prediction prediction. Combined with the analysis of historical shock data, the general method of predicting the predictive prediction of the typical chimneys and the prediction matrix of the group predicting the group are given.
Nie Jianguo; Guards;
Abstract: This article studies the actual work performance and bearing capacity of the group shear connector through the test of the steel-concrete combination beam. The method of calculating the actual bearing capacity of the shear connector was calculated using the test results. Tests and computing show that the actual bearing capacity of the shear connector in the combination beam is higher than the bearing capacity obtained by the launch test (8-35 %). The study of this article shows that the Calculating formula for the Calculating Calculation of the Steel Steel and Polying Connection of the Steel Structural Design (GBJ17-88) is pretty safe.
Sun Bolu;
Abstract: This article is the sequel of the literature [1]. Specializing in the projection rules of the "line" spatial angle, the automatic positioning of quantitative transformation, and the determination of the projection of the 2 ~ n and other angle line projection. In the article, through statistical classification of the composition of this type of spatial angle, it has established a geometric model suitable for all combined forms, improves the currently widely used space angle and its functional relationship expression based on a certain conditions, and reveals the inherent laws between them. In addition to solving the calculation of the spatial angle, it can also dynamically study the automatic positioning of the quantitative transformation of the spatial angle (including the general position of non -right -angle projection), and for the first time, it proposes a mathematical expression that solves the angle projection of angle lines such as 2 ~ N.
Tang Yali; Shen Ningfu; Shao Guosheng;
Abstract: This article uses an analysis of the electronic microscope (AEM) to the fast solidification Al-8FE-4CE-3Ti (weight percentage) band-the unknown phase will gather the Beijing electronic diffraction (CBED), the X-ray energy spectrum (EDS), and the high-resolution analysis. The results show that it belongs to the diamond-square crystal system, the space group is R3M, and the dot matrix constant A = 1.81a (10 ~ (-10) m), c = 22.9a.
Wang Suying;
Abstract: In the laboratory conditions, the research on the seepage aluminum, the penetration structure and the performance of the laboratory. A series of slurry seepage aluminum technology is used to obtain different osmotic layers. X -ray derivatives, gold phase, mechanical performance and electrochemical methods are used to identify the structure and performance of the peak layer. The results show that all the infiltration structures of this process are single-phase solid-soluble soluble in aluminum in α-FE, so they are better ductile, and they are not easy to peel and crack. After the carbon steel seeps aluminum, the corrosion resistance is significantly improved. According to the experimental results, find the best aluminum technology. In addition, because this process is simple, the surface of the workpiece is very smooth after processing, and it is not limited by parts shape. Milky aluminum will be an effective way to improve carbon steel resistance.
Wang Wenyi;
Abstract: For the different data type definitions and storage management methods of different data types of C language and Pascal language, it detailed discusses the incompatibility and solutions of them caused by the functional restrictions of the C compiler, which laid the foundation for the efficient realization of system applications.
Feng Dongqing; Xie Songhe;
Abstract: This article analyzes the relationship between single -input linearly controllable systems and the optimal closed -loop feature polynomial polynomial polynomial and the Q -array in the secondary indicators. It proposes a linear two -time optimal design method with one pair of expectations that expects leading poles. This method is simple, easy to calculate, and is convenient for application in actual engineering design.
Zhou Zhi’an; Zhang Caiyun;
Abstract: This article discusses the axial force calculation method of the back blades and auxiliary impeller sealing pumps, and proposes to set the front blades on the front cover of the main leaf wheel to balance the excessive axial force generated by the power seal pump. Practice has proved that this is an effective way to balance the axial force of such seal pumps.
Zhou Cairong; Zhong Xian;
Abstract: This article uses a single liquid droplet method to study the dynamics of citric acid in pure water anti-applied organic amine-200 ~#本 本 本 本, establish an equation of anti-extraction dynamics, and examine the effect of temperature on the anti-extraction rate.
Wu Zhenguo; Guo Qunxian;
Abstract: This article mainly introduces the principle of battery working principle when the electrolytes of colloid electrolytes are introduced, and this is used as an electrolyte for lead battery. Compared with lead batteries, the superiority of colloid lead battery is clarified.
Liu Lalina; Wu Jinchun;
Abstract: The optical tube with a coat was used to determine the ability of the sucrose to solve the reaction through the constant temperature water cycle, and the determination of the results to basically coincide with the literature value. It proves that the constant temperature method of this article is effective.
Guo Tao;
Abstract: This article gives a method that uses three strips with control parameters in the case of non -distance nodes for curved surface fitting. The introduction of the control parameters is to adjust the shape of the surface to meet the corresponding accuracy requirements. The calculation results show that the method has high accuracy, which is flexible and easy to apply.
Hou Shuangyin;
Abstract: In this article, the nature: set ■ A∈cm × m, then there is a ~+= (a ~ ha) ~+a ~ h = a ~ h (aa ~ h) ~+Give a concise evidence. Secondly, the two theorems about A ~+are proved.
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