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INVESTIGATION　ON　THE　PHASE　DIAGRAM　OF　TERNARY　SYSTEM　LaCl_3-SrCl_2-LiCl

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Chinese Chemical Letters 1996年第5期7卷 483-486页

作者： chao gui ZHENG Yan Ke ZHENG Department of Chemistry Peking University Beijing 100871

Abstract: The phase diagram of ternary system LaCl3 - SrCl2 - LiCl has been investigated by means of DTA. It was found that there were three fields corresponding to primary crystallization of LaCl3, SrCl2 and LiCl respectively, three univeriant curves related to the secondary crystallization, a ternary eutectic E (46.8% LaCl3, 25.4% SrCl, 30.0% LiCl; 469℃) in the system. A ternary reaction occurred in the system:L = LaCl3 + SrCl2 + LiCl

关键词： LaCl3-SrCl2-LiCl SYSTEM TERNARY OF PHASE DIAGRAM INVESTIGATION

An improved fruit fly optimization algorithm for solving traveling salesman problem

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Frontiers of Information Technology & Electronic Engineering 2017年第10期18卷 1525-1533页

作者： Lan HUANG gui-chao WANG Tian BAI Zhe WANG College of Computer Science and Technology Jilin University Changchun 130012 China Key Laboratory of Symbolic Computation and Knowledge Engineering (Jilin University) Ministry of Education Changchun 130012 China

The traveling salesman problem(TSP), a typical non-deterministic polynomial(NP) hard problem, has been used in many engineering applications. As a new swarm-intelligence optimization algorithm, the fruit fly optimization algorithm(FOA) is used to solve TSP, since it has the advantages of being easy to understand and having a simple implementation. However, it has problems, including a slow convergence rate for the algorithm, easily falling into the local optimum, and an insufficient optimization precision. To address TSP effectively, three improvements are proposed in this paper to improve FOA. First, the vision search process is reinforced in the foraging behavior of fruit flies to improve the convergence rate of FOA. Second, an elimination mechanism is added to FOA to increase the diversity. Third, a reverse operator and a multiplication operator are proposed. They are performed on the solution sequence in the fruit fly's smell search and vision search processes, respectively. In the experiment, 10 benchmarks selected from TSPLIB are tested. The results show that the improved FOA outperforms other alternatives in terms of the convergence rate and precision.

关键词： Traveling salesman problem Fruit fly optimization algorithm Elimination mechanism Vision search Operator

Spin Polarization Properties of Na Doped Meridianal Tris（8-Hydroxyquinoline） Aluminum Studied by First Principles Calculations

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Chinese Physics Letters 2014年第4期31卷 193-196页

作者： REN Jun-Feng YUAN Xiao-Bo HU gui-chao College of Physics and Electronics Shandong Normal University Jinan 250014

We theoretically investigate the electronic structure and spin polarization properties of Na-doped meridianal tris（S-hydroxyquinoline） aluminum （Alq3） by first principles calculations. It is found that the spin density is distributed mainly in the Alq3 part in the Alq3：Na complex. Electron charge transfer takes place from the Na atom to the Alq3 molecule, which induces asymmetric changing of the molecule bond lengths, thus the spin density distribution becomes asymmetric. Spin polarization of the complex originates from the preferable filling of the spin-split nitrogen and carbon p-orbitals because of the different bond length changes of the Aiq3 molecule upon Na doping.

关键词： Calculations Spin Polarization electronic

Analysis of a Water-Cooled Unit under Different Loads

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Fluid Dynamics & Materials Processing 2023年第7期19卷 1863-1873页

作者： Daoming Shen Jinhong Xia chao gui Songtao Xue Xinxiang University Xinxiang453000China Department of Architecture Tohoku Institute of TechnologySendai982-8577Japan

In order to ensure the safe operation of the compressors used in water chillers,in the present study some interlock protections have been added to the related *** include a low pressure protection,a high pressure protection,an exhaust temperature protection and a differential pressure *** tests have been conducted by tuning the saturation suction and exhaust temperatures of the compressor through adjustment of the cold source outlet temperature and the ambient *** results show that the ambient temperature increases with decreasing device load and increasing fan speed under the same saturated suction temperature;the device refrigerating capacity steps up with augmenting load and dropping saturation exhaust temperature,while it is not greatly affected by the fan ***,the Energy efficiency ratio(COP)decreases with the rise of the saturation exhaust *** parameter is not affected much by the device load and fan speed at high saturation exhaust temperature,while it improves on increasing the device load and decreasing the fan speed at low saturation exhaust temperature.

关键词： Ambient temperature cold source temperature refrigerating capacity Energy efficiency ratio(COP) fan speed load

Experimental Analysis of the Performances of Unit Refrigeration Systems Based on Parallel Compressors with Consideration of the Volumetric and Isentropic Efficiency

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Fluid Dynamics & Materials Processing 2020年第3期16卷 489-500页

作者： Daoming Shen chao gui Jinhong Xia Songtao Xue College of Civil Engineering and Architecture Xinxiang UniversityXinxiang453000China Research Institute of Structural Engineering and Disaster Reduction Tongji UniversityShanghai20092China Department of Architecture Tohoku Institute of TechnologySendai982-8577Japan

The performances of a refrigeration unit relying on compressors working in parallel have been investigated considering the influence of the compressor volumetric efficiency and isentropic efficiency on the compression ***,the following influential factors have been taken into account:evaporation temperature,condensation temperature and compressor suction-exhaust pressure ratio for different opening conditions of the *** following quantities have been selected as the unit performance measurement indicators:refrigeration capacity,energy efficiency ratio(COP),compressor power consumption,and refrigerant flow *** experimental results indicate that the system refrigeration capacity and COP decrease with a decrease in evaporation temperature,increase of condensation temperature,and increase in pressure *** refrigerant flow rate increases with the increase in evaporation temperature,decrease in condensing temperature and increase in pressure *** compressor power consumption increases with the increase in condensing temperature and increase in pressure ratio,but is not significantly affected by the evaporation temperature.

关键词： Parallel compressor unit evaporation temperature condensation temperature pressure ratio refrigeration capacity energy efficiency ratio(COP)

Theoretical and Experimental Analysis of Heat Transfer and Condensation in Micro-Ribbed Tubes

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Fluid Dynamics & Materials Processing 2023年第6期19卷 1411-1424页

作者： Daoming Shen Jinhong Xia chao gui Songtao Xue Xinxiang University Xinxiang453000China Department of Architecture Tohoku Institute of TechnologySendai982-8577Japan

The thermal transmission coefficient for a micro-ribbed tube has been determined using theoretical relationships and the outcomes of such calculations have been compared with experiments conducted using a R1234yf refrigerant undergoing *** particular four theoretical single-phase flow and three multi-phase flow models have been used in this *** experimental results show that:the Oliver et *** equation overestimates the experimental results as its accuracy is significantly affected by the specific conditions realized inside micro-fin tubes;the Miyara et *** equation prediction error is less than 15%;the Cavallini et *** gives the highest prediction accuracy;the Goto et *** overestimates the test *** results are critically discussed and some indications for the improvement of such models are provided.

关键词： Micro-ribbed tube flow condensation thermal transmission coefficient dimensionless criterion equation

Three dimensional phase-field simulation for non-isothermal binary alloy solidification: Comparison with LKT theory

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China Foundry 2023年第6期20卷 545-552页

作者： Jun Wu Ting-yi Liu gui-chao Hu Rong Ma Xiao-peng Zhang Yu-fei Li chao Luo Institute of Materials China Academy of Engineering PhysicsJiangyou 621907SichuanChina

Using the advanced algorithm combining parallel computing,adaptive mesh re-griding and multigrid methods,quantitative 3D phase-field simulations of non-isothermal solidification of binary alloy were carried *** 3D phase-field simulation results were compared with the analytical LKT(Lipton,Kurz and Trivedi)*** comparison,the simulation and analytical results for 2D cases were also *** 3D phase-field simulation results support the transport portion of the LKT ***,the tip radius and tip velocity predicted by the simulations are not in good agreement with the LKT theory over the whole range of *** stability parameter calculated from phase-field simulations varies significantly with the Peclet number,indicating that the stability criterion,which assumes that the stability parameter is constant,is invalid.

关键词： 3D phase-field non-isothermal solidification free dendritic growth

PASS: a simple, efficient parallelism-aware solid state drive I/O scheduler

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第5期15卷 321-336页

作者： Hong-yan LI Nai-xue XIONG Ping HUANG chao gui Wuhan National Laboratory for Optoelectronics School of Computer Science and TechnologyHuazhong University of Science and Technology School of Information Management Hubei University of Economics School of Computer Science Colorado Technical University Colorado Spring

Emerging non-volatile memory technologies,especially flash-based solid state drives(SSDs),have increasingly been adopted in the storage *** provide numerous advantages over traditional mechanically rotating hard disk drives(HDDs)and have a tendency to replace *** to the long existence of HDDs as primary building blocks for storage systems,however,much of the system software has been specially designed for HDD and may not be optimal for non-volatile memory ***,in order to realistically leverage its superior raw performance to the maximum,the existing upper layer software has to be re-evaluated or *** this end,in this paper,we propose PASS,an optimized I/O scheduler at the Linux block layer to accommodate the changing trend of underlying storage devices toward flash-based *** takes the rich internal parallelism in SSDs into account when dispatching requests to the device driver in order to achieve high ***,it partitions the logical storage space into fixed-size regions(preferably the component package sizes)as scheduling *** scheduling units are serviced in a round-robin manner and for every chance that the chosen dispatching unit issues only a batch of either read or write requests to suppress the excessive mutual ***,the requests are sorted according to their visiting addresses while waiting in the dispatching queues to exploit high sequential performance of *** experimental results with a variety of workloads have shown that PASS outperforms the four Linux off-the-shelf I/O schedulers by a degree of 3%up to41%,while at the same time it improves the lifetime significantly,due to reducing the internal write amplification.

关键词： Solid state drive(SSD) I/O scheduler Parallelism

Effect of Carrier Differences on Magnetoresistance in Organic and Inorganic Spin Valves

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Chinese Physics Letters 2012年第6期29卷 261-264页

作者： YUAN Xiao-Bo REN Jun-Feng HU gui-chao College of Physics and Electronics Shandong Normal UniversityJinan 250014

Magnetoresistance in the structure of ferromagnetic/nonmagnetic/ferromagnetic spin valves are studied theoretically from the spin diffusion theory and Ohm's *** nonmagnetic layer could be an organic or inorganic *** mobility and the spin-flip time in organic semiconductors are different from those in inorganic semiconductors,and effects of these differences on the magnetoresistance in organic and inorganic spin valves are *** the calculation,it is found that the magnetoresistance in inorganic spin valves is higher than that in organic spin *** of the conductivity matching and spin-dependent interfacial resistances between ferromagnetic and nonmagnetic layers,thickness of the nonmagnetic layer,and the bulk spin polarization of the ferromagneticlayer on the magnetoresistance are also discussed.

关键词： inorganic resistance ferromagnetic