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MODIFIED BOTTLENECK-BASED PROCEDURE FOR LARGE-SCALE FLOW-SHOP SCHEDULING PROBLEMS WITH BOTTLENECK

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Chinese Journal of Mechanical Engineering 2006年第3期19卷 356-361页

作者： zuo yan GU Hanyu XI Yugeng Institute of Automation Shanghai Jiaotong University Shanghai 200240 China

A new bottleneck-based heuristic for large-scale flow-shop scheduling problems with a bottleneck is proposed, which is simpler but more tailored than the shifting bottleneck （SB） procedure. In this algorithm, a schedule for the bottleneck machine is first constructed optimally and then the non-bottleneck machines are scheduled around the bottleneck schedule by some effective dispatching rules. Computational results show that the modified bottleneck-based procedure can achieve a tradeoff between solution quality and computational time comparing with SB procedure for medium-size problems. Furthermore it can obtain a good solution in quite short time for large-scale scheduling problems.

关键词： Flow-shop scheduling problem Heuristic Bottleneck machine

DSC based Dual-Resunet for radio frequency interference identification

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Research in Astronomy and Astrophysics 2021年第12期21卷 315-325页

作者： yan-Jun Zhang yan-zuo Li Jun Cheng Yi-Hua yan School of Cyberspace Science and Technology Beijing Institute of TechnologyBeijing 100081China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China CAS Key Laboratory of Solar Activity National Astronomical ObservatoriesBeijing 100101China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100864China

Radio frequency interference(RFI)will pollute the weak astronomical signals received by radio telescopes,which in return will seriously affect the time-domain astronomical observation and *** this paper,we use a deep learning method to identify RFI in frequency spectrum data,and propose a neural network based on Unet that combines the principles of depthwise separable convolution and residual,named DSC Based *** with the existing Unet network,DSC Based Dual-Resunet performs better in terms of accuracy,F1 score,and MIoU,and is also better in terms of computation cost where the model size and parameter amount are 12.5%of Unet and the amount of computation is 38%of *** experimental results show that the proposed network is a high-performance and lightweight network,and it is hopeful to be applied to RFI identification of radio telescopes on a large scale.

关键词： techniques:deep learning and image processing radio frequency interference telescopes Sun:radio radiation

Advances in Arabidopsis research in China from 2006 to 2007

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Chinese Science Bulletin 2007年第13期52卷 1729-1733页

作者： LIANG yan zuo JianRu yanG WeiCai National Center for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China

Arabidopsis thaliana，模型植物种，由于许多作为一个试验性的有机体比另外的植物种类有很多个优点它的基因并且 genomic 特征。TheChinese Arabidopsis 社区做了重要贡献在 recentyears~ 种生物学研究([1,2 ]) 。在 2006，在中国的植... 详细信息

Arabidopsis thaliana，模型植物种，由于许多作为一个试验性的有机体比另外的植物种类有很多个优点它的基因并且 genomic 特征。TheChinese Arabidopsis 社区做了重要贡献在 recentyears~ 种生物学研究([1,2 ]) 。在 2006，在中国的植物生物学的研究以前比平常收到了更多的注意，特别那些与 Arabidopsis 研究相关。这里，我们简短在中国总结最近的进展 inArabidopsis 研究。

关键词：阿布属 2006年 2007年中国植物种类实验研究

Influence of Deposition Pressure on Properties of ZnO：Al Films Fabricated by RF Magnetron Sputtering

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Journal of Wuhan University of Technology(Materials Science) 2016年第6期31卷 1235-1239页

作者：刘超英 HE Feng yan Ningning ZANG Shuguang zuo yan MA Juanrong China Building Materials Academy Beijing 100024 China National Research Center for Glass Processing Beijing 100024 China School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

Transparent conductive aluminum doped zinc oxide（ZnO：Al,AZO） films were prepared on glass substrates by rf（radio frequency） magnetron sputtering from ZnO： 3wt% Al_2O_3 ceramic target. The effect of argon gas pressure（PAr） was investigated with small variations to understand the influence on the electrical, optical and structural properties of the films. Structural examinations using X-ray diffraction（XRD） and scanning electron microscopy（SEM） showed that the ZnO：Al thin films were（002） oriented. The resistivity values were measured by four-point probe with the lowest resistivity of 5.76×10^（-4） Ω？cm（sheet resistance=9.6 Ω/sq. for a thickness=600 nm） obtained at the PAr of 0.3 Pa. The transmittance was achieved from ultravioletvisible（UV-VIS） spectrophotometer, 84% higher than that in the visible region for all AZO thin films. The properties of deposited thin films showed a significant dependence on the PAr.

关键词： magnetron sputtering Al-doped zinc oxide argon pressure properties

Novel nanoparticles composed of chitosan and β-cyclodextrin derivatives as potential insoluble drug carrier

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Chinese Chemical Letters 2015年第7期26卷 909-913页

作者： yan-zuo Chen Yu-Kun Huang Yuan Chen Ya-Jing Ye Kai-yan Lou Feng Gao Shanghai Key Laboratory of Functional Materials Chemistry East China University of Science and Technology Department of Pharmaceutics School of Pharmacy East China University of Science and Technology Shanghai Key Laboratory of New Drug Design East China University of Science and Technology Shanghai Institute of Health Sciences

This research was aim to develop novel cyclodextrin/chitosan （CD/CS） nanocarriers for insoluble drug delivery through the mild ionic gelation method previously developed by our lab. A series of different β- cyclodextrin （β-CD） derivatives were incorporated into CS nanoparticles including hydroxypropyl-β- cyclodextrin （HP-β-CD）, sulphobutylether-β-cyclodextrin （SB-β-CD）, and 2,6-di-O-methy-βcyclodex- trin （DM-β-CD）. Various process parameters for nanoparticle preparation and their effects on physicochemical properties of CD/CS nanoparticles were investigated, such as the type of CD derivatives, CD and CS concentrations, the mass ratio of CS to TPP （CS/TRP）, and pH values. In the optimal condition, CDICS nanoparticles were obtained in the size range of 215-276 nm and with the zeta potential from 30.22 mV to 35.79 mY. Moreover, the stability study showed that the incorporation of CD rendered the CD/CS nanocarriers more stable than CS nanoparticles in PBS buffer at pH 6.8. For their easy preparation and adjustable parameters in nanoparticle formation as well as the diversified hydrophobic core of CD derivatives, the novel CD/CS nanoparticles developed herein might represent an interesting and versatile drug delivery platform for a variety of poorly water-soluble drugs with different physicochemical properties.

关键词： Chitosan Cyclodextrin derivatives Ionic gelation method Drug delivery system

Recent research progress of bimetallic phosphides-based nanomaterials as cocatalyst for photocatalytic hydrogen evolution

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Chinese Chemical Letters 2022年第3期33卷 1141-1153页

作者： Chunmei Li Daqiang Zhu Shasha Cheng yan zuo Yun Wang Changchang Ma Hongjun Dong Advanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province Institute of Green Chemistry and Chemical TechnologySchool of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Department of Chemistry Dongguk UniversitySeoul 04620Republic of Korea

Hydrogen energy(H_(2)) has been considered as the most possible consummate candidates for replacing the traditional fossil fuels because of its higher combustion heat value and lower environmental *** hydrogen evolution(PHE) from water splitting based on semiconductors is a promising technology towards converting solar energy into sustainable H_(2)fuel evolution. Developing high-activity and abundant source semiconductor materials is particularly important to realize highly efficient hydrogen evolution as for photocatalysis technology. However, unmodified pristine photocatalysts are often unable to overcome the weakness of low performance due to their limitations. In recent years, transition metal phosphides(TMPs) were used as valid co-catalysts to replace the classic precious metal materials in the process of photocatalytic reaction owing to their lower cost and higher combustion heat *** is more, bimetallic phosphides have been also caused widespread concern in H_(2)evolution reaction owing to its much lower overpotential, more superior conductivity, and weaker charge carriers transfer impedance in comparison to those of single metal phosphides. In this minireview, we concluded the latest developments of bimetallic phosphides for a series of photocatalytic reactions. Firstly, we briefly summarize the present loading methods of bimetallic phosphides(BMPs) anchored on the photocatalyst. After that, the H;evolution efficiency based on BMPs as cocatalyst is also studied in detail. Besides, the application of BMPs-based host photocatalyst for H_(2)evolution under dye sensitization effect has also been discussed. At last, the current development prospects and prospective challenges in many ways of BMPs are proposed. We sincerely hope this minireview has certain reference value for great developments of BMPs in the future research.

关键词： Bimetallic Phosphides Cocatalyst Photocatalysis Hydrogen evolution Dye Sensitization Effect

Effects of Prior Corrosion with and Without Stress on the Mechanical Properties of 7475-T761 Aluminum Alloy

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Acta Metallurgica Sinica(English Letters) 2015年第5期28卷 608-613页

作者： zuo-yan Ye Dao-Xin Liu Meng Yuan Xiao-Ming Zhang Zhi yang Ming-Xia Lei Corrosion and Protection Research Laboratory Northwestern Polytechnical University Aviation Industry Corporation of China the First Aircraft Institute

The effect of prior corrosion on the mechanical properties of 7475-T761 aluminum alloy was investigated by immersion test, stress corrosion test, cathode charge method and electrochemical polarization test. Results show that prior corrosion in the solution with 3 wt% NaC1 and 0.5 wt% H202 leads to mechanical properties deterioration of 7475-T761 aluminum alloy. Moreover, the elongation decreases significantly. This is mainly attributed to electrochemical corrosion and hydrogen embrittlement, in which corrosion plays a major role. Tensile stress promotes the degradation of the mechanical properties by accelerating the pitting corrosion and hydrogen embrittlement.

关键词： Prior corrosion Corrosion with stress 7475 aluminum alloy Mechanical properties Hydrogen embrittlement

Corrosion Fatigue Behavior of 7A85 Aluminum Alloy Thick Plate in NaCl Solution

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Acta Metallurgica Sinica(English Letters) 2015年第8期28卷 1047-1054页

作者： zuo-yan Ye Dao-Xin Liu Xiao-Hua Zhang Xiao-Ming Zhang Ming-Xia Lei Zhi yang Corrosion and Protection Research Laboratory Northwestern Polytechnical University AVIC the First Aircraft Institute

The S–N curves of 7A85-T7452 aluminum alloy in laboratory air and in neutral 3.5 wt% NaCl solution were obtained by axial fatigue tests. Results show that the detrimental effect of the aggressive solution was not noticeable at high-cyclic-stress regions, but the effect was significant at low-stress region. Corrosion fatigue mechanism was discussed by corrosion morphology analysis, fracture surface analysis and microstructure characterization. It was found that the corrosion fatigue crack commonly initialed at the localized intergranular corrosion site. TEM analysis showed that the microstructures of 7A85-T7452 aluminum alloy were characterized by fine and homogeneously distributed matrix precipitates, as well as continually distributed anodic grain boundary precipitates. The types of microstructures are the reason for its intergranular corrosion susceptibility. The corrosion fatigue process of 7A85 aluminum alloy in 3.5 wt% NaCl solution can be divided into four stages： the crack initiation stage, the stable growth stage with low and high growth rate and the final rupture stage. The sodium chloride solution mainly affected the crack initiation stage and the stable growth stage with low growth rate, and when the crack growth rate reached a threshold, the effect was reduced.

关键词： Corrosion fatigue Intergranular corrosion Microstructure 7A85 aluminum alloy

Improved Photovoltaic Performance of MEH-PPV/PCBM Solar Cells via Incorporation of Si Nanocrystals

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Chinese Journal of Chemistry 2013年第11期31卷 1380-1384页

作者： Quanxiang yan Lijian zuo Zhuowei Gu Ligong yang Rong Wang Mang Wang Hongzheng Chen State Key Lab of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and Functionalization & Department of Polymer Science and Engineering Zhejiang University Hangzhou Zhejiang 310027 China

We have studied the effect of silicon nanocrystals （SiNCs） as a third component on performance of organic bulk heterojunction solar cells composed of poly[2-methoxy,5-（2＇-ethylhexyloxy）-l,4-phenylene vinylene] （MEH- PPV）：[6,6]-phenyI-C61-butyric acid methyl ester （PCBM） blend film. By adding suitable amounts of SiNCs into MEH-PPV：PCBM blend, the device performance such as external quantum efficiency, short circuit current density （Js（）, and power conversion efficiency （PCE） improved. Incorporation of 2.5% SiNCs in the blend led to 13.6% improvement of Jsc, which in turn resulted in 18% improvement of PCE up to 2.28%. The improved performance was mainly due to the improvements both in the charge generation from the interface of MEH-PPV/SiNCs and the charge collection at the cathode.

关键词： polymer/fullerene solar cell interface silicon nanoparticles exciton disassociation thin films