Abstract:

Abstract: In this paper, the vitreous structure model of calcium magnesium phosphate fertilizer and its mathematical expression are established according to the theory of "network - crystal".The glass structure factor (Ob/Yb) is proposed to calculate the glass network size.The glass structure factors of 722 samples of calcium magnesium phosphate fertilizer at home and abroad were calculated by electronic computer, and the "melting point - glass structure factor" composition chart (T3-OB /Yb chart) was developed.Using this new method, the rational use of the ingredients for various phosphate ores in China has been made.Laboratory and industrial tests show that the new batching method is beneficial to the rational utilization of medium and low grade phosphate rock and some industrial wastes, and is beneficial to improving product quality and increasing profit.Through chemical analysis, polarizing microscope image, electron microscope scanning, X-ray diffraction analysis and computer analysis of a large number of factory data, the correctness of using glass structure factor in the composition of calcium magnesium phosphate fertilizer was confirmed.The author believes that it is meaningful to use local resources to produce "phosphorus - potassium - trace element" compound fertilizer in many countries.Ob/Yb dosing method is helpful to the rational utilization of medium and low grade phosphate ore and insoluble low grade potassium ore widely distributed in the world.

Abstract: In this paper, the vitreous structure model of calcium magnesium phosphate fertilizer and its mathematical expression are established according to the theory of "network - crystal".The glass structure factor (Ob/Yb) is proposed to calculate the glass network size.The glass structure factors of 722 samples of calcium magnesium phosphate fertilizer at home and abroad were calculated by electronic computer, and the "melting point - glass structure factor" composition chart (T3-OB /Yb chart) was developed.Using this new method, the rational use of the ingredients for various phosphate ores in China has been made.Laboratory and industrial tests show that the new batching method is beneficial to the rational utilization of medium and low grade phosphate rock and some industrial wastes, and is beneficial to improving product quality and increasing profit.Through chemical analysis, polarizing microscope image, electron microscope scanning, X-ray diffraction analysis and computer analysis of a large number of factory data, the correctness of using glass structure factor in the composition of calcium magnesium phosphate fertilizer was confirmed.The author believes that it is meaningful to use local resources to produce "phosphorus - potassium - trace element" compound fertilizer in many countries.Ob/Yb dosing method is helpful to the rational utilization of medium and low grade phosphate ore and insoluble low grade potassium ore widely distributed in the world.

Abstract: In this paper, according to the variation law of the measured load-deflection curve in the experimental study of the rectangular stirrup constrained reinforced concrete biased column, a simplified load-deflection curve expressed by the line of each characteristic point and the method and calculation formula for determining each characteristic point are proposed. Compared with the measured curve, the calculation formula can determine the maximum bearing capacity, ultimate bearing capacity and displacement of the biased columnDuctility coefficient is referred to.

Abstract: In this paper, the piston motion equation, volume equation, the relationship between structural parameters and thermal parameters, the cooling capacity and other equations are derived for the Stirling cycle three-space cryogenic gas engine around 15K.Stirling (Stirling) cycle, the positive cycle for the hot air engine cycle, the reverse cycle for the air conditioner cycle.Because the refrigeration temperature is about 15K, it belongs to the low temperature range, so it is also called low temperature gas machine.The Stirling cycle three-space cryogenic gas engine described in this paper is shown in FIG. 1 for the specific schematic structure.

Abstract: 本文对下面两个结果都给出最简明的证法。(一)二顶式(1+x)组数1+mx+m(m-1)\2!x2+…+m(m-1)…(m-n+1)\n!xn+…(1)(m≠0,1,2,……)在|x|=1处的敛散性.(二)当x+1且m＞-1时,级数(1)的和为(1+1)m=2m;当x=-1且m>0时。级数(1)的和为(1-1)m=0.

Abstract: In this paper, the stiffness matrix of wedge bar with variable section is derived.Based on the principle of finite element displacement method, a program for calculating the reinforced concrete frame with wedge shaped variable section bar is developed by using extended BASIC language.The program can calculate frames with any geometry and support.Output on a computer;① The displacement and Angle of each node line,② the internal force of each rod end (N, Q, M),③ the beam and column section reinforcement.The program has been used in practical engineering design.

Abstract: With the deepening of structural vibration research and seismic calculation, it is necessary to find a more effective dynamic analysis method.Subspace iteration provides an effective method for dynamic calculation of spatial linkage structures with a large number of degrees of freedom.Therefore, this paper focuses on the calculation principle of subspace iteration method and its application in the seismic calculation of space truss structures.

Abstract: In this paper, the transition relationship between elastoid-foam flow and gas-liquid two-phase upward flow in vertical tubes is discussed.From the point of view of industrial application, a simple formula for the flow pattern transformation of air-water system is presented, and the influence of various factors on the flow pattern transformation is analyzed.

Abstract: 1, specimen production This batch of composite beam specimens by Henan fifth construction Engineering Company for the production of components factory, in the Zhengzhou Institute of Technology Department of civil engineering structure laboratory test.The steel beam is made of 22Ia I-section steel and the slab is cast in situ concrete with a thickness of 10.5 cm.Connecting parts are made of No. 8 channel steel, 7 cm long.The span of the composite beam is 5 meters.When the composite beam is made, a relatively straight steel beam is used, buried in the ground mold, and the lower wing tip and toe of the channel steel (connector) are fillet welded to the upper wing surface of the steel beam with 42# welding rod along the length direction of the channel steel. The weld height is generally 6 millimetres

Abstract: In this paper, after the survey of environmental noise in Zhengzhou city is finished, the evaluation of the measured results and the suggestions on how to study in the future are put forward.

Abstract: The Science and Technology Lecture Hall of Zhengzhou Institute of Technology is located in the center of the campus teaching area (Figure 1).It is a large amphitheater for scholars and scientific and technological personnel at home and abroad to carry out academic exchanges, attend classes together, watch teaching videos or experimental demonstrations and other functions.In addition to the hall requiring about 500 seats, there must be rooms for reception, rest, audio-visual teaching and audio-visual equipment (such as monitoring room, screening room, etc.).

Abstract: In this paper, the determination of valence ratio of iron in Fe(Ⅱ)(Ⅲ) -EDTA system has been preliminarily solved by experiments according to the problems existing in production practice.

Abstract: For the determination of chloride ions in natural alkali ore and its aqueous solution leaching solution (alkali halide), capacity precipitation method is also commonly used in production at present, the shortcomings of this method not only require the consumption of more expensive silver nitrate reagents, but also when the chloride ion content is small, the laboratory personnel are not easy to do accurately, especially the chloride ion content in alkali ore, with the different parts of the mineral layer, sometimes change greatly.Therefore, how to determine a sample suitable for the determination of high chlorine content in production;It is also suitable for the determination of samples with low chlorine content, which is a very practical research topic.

Abstract: This paper illustrates the application of graphical analysis of static characteristics of hydraulic circuit, especially the analysis of hydraulic speed control circuit.

Abstract: <正> 实际气体同理想气体性质之间存在着偏差,且偏差随气体压力升高而增大。为使理想气体的热力学函数关系式能用于实际气体,路易斯(G.N.Lewis)提出一个新函数,称为逸度f,用来代替理想气体关系式中的压力P。这就使理想气体的热力学函数关系式能用于实际气体。但是,在热力学函数计算中,因为许多热力学函数只能求其相对值,所以就必须选一

Abstract: In this paper, a general formula for solving the full response of a first-order linear circuit under arbitrary excitation by using "three-element method" is derived, and six examples of solving the full response of a first-order linear circuit under step excitation, sinusoidal excitation, instruction function excitation and shock excitation are given

Abstract: In 1979, our college began a comprehensive trial of teacher workload system.From 1979 to 1980, 53 teachers (accounting for 13.4% of the total number of teachers) exceeded the teaching workload, and the remuneration was more than 4,200 yuan;From 1980 to 1981, 93 teachers (accounting for 19.2% of the total number of teachers) exceeded the teaching workload, and the remuneration was more than 9,500 yuan.Through two years of practice, we believe that it is imperative to carry out the teacher workload system in colleges and universities, which has played a positive role in mobilizing teachers’ enthusiasm and strengthening the construction of teachers.