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THE LINEAR HOMOGENEOUS FLOW MODEL FOR TWO-PHASE FLOW INSTABILITY IN BOILING CHANNELS

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Journal of Hydrodynamics 2002年第2期14卷 106-111页

作者： Zhou Yun-long, Sun Bin, Gu Xin, Liang Qiang Northeast China Institute of Electric Power Engineering, jilin 132012, China Northeast China Inst. of Elec. Jilin 132010 China

This paper presents liner homogeneous model describing two-phase flow instability. Dimensionless parameter η was derived by using the linear homogeneous model. Using parameter η the stability of a system could b... 详细信息

关键词： evaporated tubes steam-liquid two-phase flow homogeneous model

THE FRICTIONAL RESISTANCE CHARACTERISTICS OF GAS LIQUID TWO PHASE FLOW IN HELICAL COILED TUBES

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Journal of Hydrodynamics 2000年第4期12卷 16-19页

作者： Zhou Yun long, Shi Hui xian Department of Thermal Power, Northeast China Institute of Electric Power Engineering, jilin 132012, P.R.China (Received Oct. 28, 1999) Dep. of Thermal Power Northeast Inst. of Power Eng. Jilin 132012 China

This paper deal with the frictional resistance characteristics of gas liquid two phase flow in vertical upward helical coiled tubes under the system pressure 0.1 0.6MPa. By means of dimension analysis and π theorem, the correlation formulas were obtained for calculating the frictional resistance coefficients of gas liquid two phase flow in helical coiled tubes. The calculated results agree well with the experimental results.

关键词： frictional resistance gas liquid two phase flow helical coiled tubed

Existence and Uniquenes Theorems of Solutions for a Class of 2nth-order Boundary Value Problems

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Communications in Mathematical Research 1999年第1期 121-126页

作者： Pei Minghe (Department of Mathematics, jilin Teacher’s College, jilin City, 132011) Yu Hailan (Department of Basic Science Courses, Northeast China Institute of Electronic Power Engineer, jilin City, 132012)

§１．ＩｎｔｒｏｄｕｃｔｉｏｎＦｏｕｒｔｈ－ｏｒｄｅｒｔｗｏ－ｐｏｉｎｔｂｏｕｎｄａｒｙｖａｌｕｅｐｒｏｂｌｅｍｓａｒｅｅｓｓｅｎｔｉａｌｉｎｄｅｓｃｒｉｂｉｎｇａｖａｓｔｃｌａｓｓｏｆｅｌａｓｔｉｃｄｅｆｌｅｃｔｉ... 详细信息

§１．ＩｎｔｒｏｄｕｃｔｉｏｎＦｏｕｒｔｈ－ｏｒｄｅｒｔｗｏ－ｐｏｉｎｔｂｏｕｎｄａｒｙｖａｌｕｅｐｒｏｂｌｅｍｓａｒｅｅｓｓｅｎｔｉａｌｉｎｄｅｓｃｒｉｂｉｎｇａｖａｓｔｃｌａｓｓｏｆｅｌａｓｔｉｃｄｅｆｌｅｃｔｉｏｎｓ．Ｕｓｍａｎｉ［１］ｓｔｕｄ...

关键词： 2 n th order Differential Equation Two point Boundary Value Problem Existence Uniqueness

THE　LINEAR　SEPARATED　FLOW　MODEL　FOR　TWO－PHASI　FLOW　INSTABILITY　IN　BOILING　CHANNELS

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Journal of Hydrodynamics 1996年第2期8卷 9-16页

作者： Zhou Yun-long Shen Zeng-ming Shi Hui-xian(Northeast China Institute of Electric Power Engineering, jilin 132012, P. R. China)Chen Ting-kuan Chen Xue-jun(Xi’an Jiaotong University, Xi’an 710049, P. R. China) Northeast China Inst of Electric Power Engineering Jilin China

This paper presents linear separated model describing two-phase now instability. By employing the method of separated model and system control theory, dynamic system characteristic equations of describing two-phase flow instability are *** can be decided system stability depending on the characteristic value of characteristic equations. The calculated results agree well with the experimental data.

关键词： evaporated tube vapor-liquid two-phase flow instability separated Model

A Heavy Metal Analysis Device Based on Light-addressable Potentiometric Sensor

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稀有金属材料与工程 2006年第S3期 230-231页

作者： Hong Men~1 Jianguo Wang~1 Jing Gao~2 Ping Wang~3 (1.College of Automation Engineering,Northeast Dianli University,jilin 132012,China) (2.Department of Basic Courses,jilin Medical and Pharmaceutical College,jilin 132013,China) (3.Biosensor National Special Laboratory,Zhejiang University,Hangzhou 310027,China)

A full automatic device to detect heavy metal Hg,Fe,Cr elements based on thin-film sensitive materials prepared on surface of light-addressable potentiometric sensors （LAPS） by means of pulsed laser deposition PLD) technique is developed. High-purity chemical compound AgI:Ag2S:HgI synthesized were used as target of PLD,thin film sensitive to Hg~ （2+） ion was prepared on the surface of ***-solide-state chalcogenide glass ion-selective electrodes ISE) ,Fe-ISE and Cr-ISE,were also used as targets of PLD,and thin-film sensors on different LAPS sensitive to Fe~ （3+） and Cr~ （6+） ions were *** heavy metal analysis device with characteristics of collect sample in-site,real-time determination,communication and multifunction software were *** design of the device mainly includes control and measurement *** detected limits of Hg,Fe,Cr ions are 3.44×10~ （-7） mol/L,6.31×10~ （-6） mol/L and 2.09×10~ （-7） mol/L,respectively.

关键词： analysis chemistry sensor heavy metal LAPS PLD

Generators’ Price Strategy Based on the Multidimensional Game Theory

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Generators’ Price Strategy Based on the Multidimensional Ga...

2011 Chinese Control and Decision Conference（CCDC）

作者： Jing Gu,Daiqing Song,Northeast Dianli University College of Science jilin 132012

In the generation market,generators normally trade in spot and contract market simultaneously so a reasonable and effective price strategy is of great *** strategy should impel the generator to strengthen management,increase their efficiency thereby reduce the cost of electricity generation and meanwhile,the maximization of profit should be *** the application of multidimensional game theory,this thesis analyzes the generators’ Game behavior in price strategy in both spot and contract market in power market.

关键词： Spot market Contract market Generator Nash equilibrium

A NON LINEAR ANALYSIS OF TWO PHASE FLOW INSTA BILITY IN PARALLEL CHANNELS OF A BOILING SYSTEM

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Journal of Hydrodynamics 1999年第3期11卷 36-43页

作者： Zhou Yun long, Cheng Zhuo ming, Cai Hui Northeast China Institute of Electric Power Engineering, jilin 132012, P.R.China (Received Sep. 18, 1998)

This paper proposes a non linear mathematical model of two phase flow instability in parallel channels of a boiling system. Close agreement is obtained between calculations based on this model and measurements of the stable boundary in a system of two channels. The model is also applied to the cases of three and four parallel channels.

关键词： parallel channel flow instability mathematical model

Large Eddy Simulation on Compound Angle Film Cooling of Turbine Blades

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Large Eddy Simulation on Compound Angle Film Cooling of Turb...

Measurement Touch the World——IEEE 2011 10th International Conference on Electronic Measurement & Instruments(ICEMI’2011)

作者： Zhang Ling Wen Guoliang School of Energy and Power Engineering Northeast Dianli University 132012 jilin jilin Province China

Large Eddy Simulation（LES）was performed to investigate the flow structures and the development process of vortices in different sections of a stationary gas turbine at M=1.5,while the jet hole of the leading edge has compound *** results show that the jet in a cross-flow is a highly complex turbulent flow due to the action of many structures in the field,including the jet shear-layer vortices,the system of horseshoe vortices,the counter-rotating vortex pair,and the wake *** cooling effectiveness is better on the suction side and on the pressure side with laying compound angles film-cooling *** vortices in the centreplane are shed off to form new vortices periodically with period of *** generation of CVP on the pressure side is earlier than that on the suction side and the effect of CVP on the pressure side is stronger than that on the suction side.

关键词： Film cooling large eddy simulation compound angles counter-rotating vortex pair

The Research of Improved Apriori Algorithm for Mining Association Rules

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The Research of Improved Apriori Algorithm for Mining Associ...

2008 11th IEEE International Conference on Communication Technology(ICCT2008)

作者： WanjunYu 1 XiaochunWang 1 Fangyi Wang 2 Erkang Wang 1 Bowen Chen 1 1 School of Information and Engineering Northeast Dianli University jilin jilin province 132012 China 2 School of General Division Department jilin Industrial Economics jilin jilin province 132012 China

Association rules are the main technique for data *** algorithm is a classical algorithm of association rule mining Lots of algorithms for mining association rules and their mutations are proposed on basis of Apriori algorithm,but traditional algorithms are not *** the two bottlenecks of frequent itemsets mining:the large multitude of candidate 2itemsets,the poor efficiency of couting their support,this paper proposes a novel algorithm so called Reduced Apriori Algorithm with Tag（RAAT）,which reduces one redundant pruning operations of C *** the number of frequent 1-itemsets is n,then the number of connectded candidate 2-itemsets is C n 2,while pruning operations C n *** noval algorithm decreases pruning operations of candidate 2-itemsets,thereby saving time and increasing *** the bottleneck:poor efficiency of couting support,RAAT optimizes subset operation,through the transaction tag to speed up support *** experimental results obtained from tests show that RAAT outperforms original one efficiency.

关键词： data mining association rules apriori algorithm