最新刊期
卷 ， 期 5 ， 2000
- 摘要：GDI （Gasoline Direct Injection into cylinder）has become an up to date research topic.With a precise control of jet timing by computer against the operating conditions,this injection adopts a quality changing regulation of gasoline engine power instead of amount changing regulation of intake flow.Leading to a high specific power rate,low fuel consumption and very low discharge level of harmful atmosphere.Take 4G93 gasoline engine of Mitsubishi as an example,this paper discussed the technological characteristics and features of GDI.关键词：gasoline direct injection;lean burn;changeable fuel get time
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发布时间：2022-01-07 - 摘要：The hydraulic profile control and water shutoff pump is a hydraulic driven reciprocating pump with double cylinders and single action.The maximum working pressure is 25 MPa and the maximum displacement is 12 m 3/h.The pump has the characteristics of smooth in pressure and reliable in working.It can work normally when the solid terms of the pumped fluid are 45 per cent.The viscidity of the polymers in the pumped fluid can be kept in above 99 per cent.The application in oilfields indicates that the pump is an ideal injection equipment in profile control and water shutoff operations.关键词：hydraulic reciprocating pump;profile control;water shutoff
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发布时间：2022-01-07 - 摘要：The conception and connotation of manufacturing automation was mentioned.The state of the art on manufacturing automation was summarized.Its developing trend was shown.关键词：manufacturing automation;state of the art;developing trend
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发布时间：2022-01-07 - 摘要：On the base of the characteristic and the toughening demand of ceramics,analyzing the structure and the brittleness mechanism of ceramics,author put forward the toughening measure of raising fracture energy and slippage system,and especially study on and analyses the toughening mechanism of ZrO 2 phrase transformation.关键词：ceramics;brittleness;toughness;toughening
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发布时间：2022-01-07 - 摘要：A intelligent program controller of time is introduced,and the hardware circuit and software calculation are given.关键词：magnetic valve;chip microcomputer;buffer;scanning;interruption
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发布时间：2022-01-07 - 摘要：This paper is a macro and micro analysis of the crack on the failure turbine of a bottle washing machine.We made the conclusion:The main reason of the crack initiated from the root of the tooth is that the large amount of ternary eutectic at the root of the tooth resulted from the concentration segregation.And the low cycle fatigue of the turbine in the stress concentration.关键词：fracture;failure analysis;fatigue
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发布时间：2022-01-07 - 摘要：One of the most important tendencies of the development of machine tool manufacturing technology in 21 century is environment protecting machine tool.With the issuance and implementation of ISO14000 standards,it will become necessary in 21 century international market that machine tool meet the requirement of environment protecting.The feature of environment protecting machine tool and its development state of art were introduced in this paper.关键词：environment protecting machine tool;shelter;dry cutting;coolant
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发布时间：2022-01-07 - 摘要：The changing law of the resistance of the earth of the laterally loaded piles is obtained by means of nonlinear curve fitting technology.The loading capacity and the stiffness of the piles are given by numerical computations.The results have a certain direct effect for the design and application of laterally loaded piles.关键词：laterally loaded piles;resistance of the earth;stiffness
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发布时间：2022-01-07 - 摘要：Construction of solutions and adequate necessary conditions for existence and uniqueness of solution for initial value problems of singular liner systems are studied in this paper.关键词：singular liner systems;solution;construction
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发布时间：2022-01-07 - 摘要：This paper investigates the minimal and maximal solutions of nonlinear Volterra integral equations with discontinuous terms and shows that the conditions of the main result in reference [1] may be replaced by weaker conditions.
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发布时间：2022-01-07 - 摘要：This paper is devoted to the two natures of geodetic graphs contains longest cycle C 2n .The geodetic graphs formed by C 2n and its two secants is obtained.关键词：cycle;geodetic;secant;regular cone;nature
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发布时间：2022-01-07 - 摘要：We discussed the relations between geometric and mathematical analysis′s propsition in this paper and proved the function of geometric figure to proposition with living exeamples.关键词：geometric figure;proposition;prove
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发布时间：2022-01-07 - 摘要：The property of combining ridge and principal components estimate is studied on the ridged class of reduced dimension estimators it is caved that combining ridge and principal components estimate have some optimality under different conditions in the class of reduced dimension estimators.
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发布时间：2022-01-07 - 摘要：A new cryptosystem,on the basis of nonuniform decimal,is established.The algorithm of the cryptosystem is simple.We show that the cryptosystem is secure if the key is chosen properly.关键词：nonuniform decimal;cryptosystem;cryptoanalysis
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发布时间：2022-01-07 - 摘要：Using the method of blur mathematics,to combine the target of the teaching appraisement and confirm the main factors of the appraised target.关键词：blur mathematics;combine the factors of the target;appraised target
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发布时间：2022-01-07 - 摘要：Under the action of high energies,the hard sphere scattering was studied in this paper by method of partial waves.The study indicates that the solution gives approximation 2πR 2.关键词：hard sphere;scattering;cross sections;the method of partial waves
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发布时间：2022-01-07 - 摘要：The urushiol titanium chelate was synthesized by reaction of urushiol with titanium tetrachloride in dimethyl benzene and charaterized primarily by means of IR and differential thermal analysis its solvency,thermal and chemical stability were studied as well.关键词：urushiol;urushiol titanium chelate;o phendiol;high polymer
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发布时间：2022-01-07 - 摘要：The influence of pH on amount of Cu 2+ and Zn 2+ in the Huanghe river water was determined by flame atomic absorption spectrometry.The result indicated the lower of the pH,the more the amounts of Cu 2+ and Zn 2+ .The rate of recovery was between 94%～104%,the relative standard deviation was smaller than 2%.
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发布时间：2022-01-07 - 摘要：This paper introduces the sythesis of nonenecarboxylic acid from n heptanal,obtains the kind of catalyst as well as it’s quantity and the reacting time demanded in practice and solves the problem of the product treatment afterward.The satisfying productivity is achieved.关键词：N heptanal;medium of spice;nonenecarboxylic acid
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发布时间：2022-01-07 - 摘要：Generating algorithm of graphical entities based on parabolic equations is discussed in this paper by means of theories of computer graphics.It is done by using C language and ADS interfaces built in AutoCAD and thereby a persecuting AutoCAD problem is resolved.关键词：parabolic equations;algorithm;transformation;computer aided design（CAD）
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发布时间：2022-01-07 - 摘要：An information distribution platform based on internet explorer has been developed for convenient and efficient message sending of different sources in order to meet the needs of public data sharing within the university.关键词：layout;information distribution;database distribution scheme
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发布时间：2022-01-07 - 摘要：The detailed design of a simple and inexpensive PC I 2C interfacing card is introduced.It can accommodate up to 16 external devices for data transfer.关键词：I 2C bus;serial communication;monitoring and control
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发布时间：2022-01-07 - 摘要：This text introduces to us about the require of Red Hat Linux hardware,the mode of install,the prepare before install and the practice process of install.关键词：Linux;Red Hat Linux;operating system
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发布时间：2022-01-07 - 摘要：This paper has deeply investigated the successful reform for physical education examine items of our university,and roundly analyzed the examine content,the examine method and the influence on college students faculty status and psychololgy diathesis,and the paper point out the countermeasure for problem of teaching exist.关键词：reform of physical education;synthesize examine;faculty status;psychology diathesis
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发布时间：2022-01-07 - 摘要：One’s brain function ability and psychological factors should be taken as important norms in health evaluation.This article intends to test and analysis the brain function ability of the students in key senior middle schools.关键词：brain function;types of nerve;growth level
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发布时间：2022-01-07 - 摘要：This article analyses the technique of rotationally pushing shot in dynamics,and thinks that this technique can prolong the acting time,and makes the shot having more initial velocity.Good effects can be got if two legs support.关键词：rotation;hurl;shot
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发布时间：2022-01-07 - 摘要：The modern and popular training methords in spoken English for communication is based on the principle of idea exchanges,which are applied to intensify the training of spoken English through modem medium to create the language environment,to provide models,to increase information and to get timely feedback.关键词：modern medium;spoken English;situation
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发布时间：2022-01-07
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