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Mushroom-shaped Morphology Formed in Thin Films of Cylinder-forming Block Copolymer

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Chemical Research in Chinese Universities 2011年第1期27卷 150-153页

作者： gong yu-mei SONG Jing-chuan ZHANG Gui-xia School of Chemical and Material Dalian Polytechnic University Dalian 116034 P R. China

The morphology of the film of polystyrene-block-poly（methyl methacrylate）（PS-b-PMMA） block copolymer having polystyrene（PS） cylinder forming composition spin-coated on a neutral brush modified silicon substrate has been investigated in this report. A mushroom-shaped morphology formed in the film with one period to two periods（L0--2L0） in thickness, which was spin-coated under a low humidity condition（RH ca.13%） and then thermally annealed at an extreme high temperature（230 ℃）. The results suggest that the spin-coating condition together with the confinement conditions plays a crucial role in the interesting morphology formation.

关键词： Block copolymer Film Morphology

Exploring evolutionary features of directed weighted hazard network in the subway construction

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Chinese Physics B 2019年第3期28卷 399-407页

作者： gong-yu Hou Cong Jin Zhe-Dong Xu Ping yu Yi-Yi Cao School of Mechanics and Civil Engineering China University of Mining and Technology School of Mining Engineering and Geology Xinjiang Institute of Engineering

A better understanding of previous accidents is an effective way to reduce the occurrence of similar accidents in the future. In this paper, a complex network approach is adopted to construct a directed weighted hazard network(DWHN) to analyze topological features and evolution of accidents in the subway construction. The nodes are hazards and accidents, the edges are multiple relationships of these nodes and the weight of edges are occurrence times of repetitive relationships. The results indicate that the DWHN possesses the property of small-world with small average path length and large clustering coefficient, indicating that hazards have better connectivity and will spread widely and quickly in the network. Moreover,the DWHN has the property of scale-free network for the cumulative degree distribution follows a power-law *** makes DWHN more vulnerable to target attacks. Controlling key nodes with higher degree, strength and betweenness centrality will destroy the connectivity of DWHN and mitigate the spreading of accidents in the network. This study is helpful for discovering inner relationships and evolutionary features of hazards and accidents in the subway construction.

关键词： accident analysis directed weighted network complex network evolutionary features

Binary glowworm swarm optimization for unit commitment

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Journal of Modern Power Systems and Clean Energy 2014年第4期2卷 357-365页

作者： Mingwei LI Xu WANG yu gong Yangyang LIU Chuanwen JIANG Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

This paper proposes a new algorithm—binary glowworm swarm optimization(BGSO)to solve the unit commitment(UC)*** a certain quantity of initial feasible solutions is obtained by using the priority list and the decommitment of redundant unit,BGSO is applied to optimize the on/off state of the unit,and the Lambda-iteration method is adopted to solve the economic dispatch *** the iterative process,the solutions that do not satisfy all the constraints are adjusted by the correction ***,different adjustment techniques such as conversion from cold start to hot start,decommitment of redundant unit,are adopted to avoid falling into local optimal solution and to keep the diversity of the feasible *** proposed BGSO is tested on the power system in the range of 10–140 generating units for a 24-h scheduling period and compared to quantuminspired evolutionary algorithm(QEA),improved binary particle swarm optimization(IBPSO)and mixed integer programming(MIP).Simulated results distinctly show that BGSO is very competent in solving the UC problem in comparison to the previously reported algorithms.

关键词： Binary glowworm swarm optimization Correction method Priority list Unit commitment

Application of Mythen detector:In-situ XRD study on the thermal expansion behavior of metal indium

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Science China(Physics,Mechanics & Astronomy) 2016年第7期59卷 62-69页

作者： Rong Du ZhongJun Chen Quan Cai JianLong Fu yu gong ZhongHua Wu Institute of High Energy Physics and University of the Chinese Academy of Sciences Chinese Academy of Sciences

A Mythen detector has been equipped at the beamline 4B9A of Beijing Synchrotron Radiation Facility （BSRF）, which is expected to enable BSRF to perform time-resolved measurement of X-ray diffraction （XRD） full-profiles. In this paper, the thermal expansion behavior of metal indium has been studied by using the in-situ XRD technique with the Mythen detector. The indium was heated from 303 to 433 K with a heating rate of 2 K/rain. The in-situ XRD full-profiles were collected with a rate of one profile per 10 seconds. Rietveld refinement was used to extract the structural parameters. The results demonstrate that these collected quasi-real-time XRD profiles can be well used for structural analysis. The metal indium was found to have a nonlinear thermal expansion behavior from room temperature to the melting point （429.65 K）. The a-axis of the tetragonal unit cell expands with a biquadratic dependency on temperature, while the c-axis contracts with a cubic dependency on temperature. By the time-resolved XRD measurements, it was observed that the [200] preferred orientation can maintain to about 403.15 K. While （110） is the last and detectable crystal plane just before melting of the polycrystalline indium foil. This study is not only beneficial to the application of metal indium, but also exhibits the capacity of in-situ time-resolved XRD measurements at the X-ray diffraction station of BSRF.

关键词： Mythen detector thermal expansion Rietveld refinement XRD indium foil

Isolation and identification of the three rice monotelosomics

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Chinese Science Bulletin 2005年第19期50卷 2182-2186页

作者： yu Hengxiu gong Zhiyun SU Yan GU Minghong Department of Agronomy Agricultural College Yangzhou UniversityYangzhou 225009 China

In order to obtain rice monotelosomic, the progeny of 24 telotrisomics, derived from an indica rice vari-ety, Zhongxian 3037, were screened. The variants that dif-fered morphologically from the diploids and the original primary trisomics as well as the telotrisomics were collected for cytological identification. The variants with 24 chromo-somes were selected according to the prometaphase chromo-somes. From these variants, three monotelosomics with one chromosome arm deletion in each were verified by fluores-cence in situ hybridization (FISH) using a rice centromeric BAC clone of 17p22 as a marker probe. The three monote-losomics were derived from telotrisomic 1S, 4L and 11L, re-spectively. Further identification was conducted on the pro-metaphase or pachytene chromosomes of the three variants, which were probed with the same centromeric BAC clone together with the corresponding chromosome arm specific makers, a0059H02 (on the short arm of chromosome 1), a0034E24 (on the long arm of chromosome 4), and a0071H11 (on the long arm of chromosome 11). The results indicated that the telocentric chromosomes in the three monotelosom-ics were derived from their respective corresponding telotrisomics. According to the telocentric chromosomes of the variants, they were monotelosomic 1S (one long arm of chromosome 1 was lost), monotelosomic 4L (one short arm of chromosome 4 was lost) and monotelosomic 11L (one short arm of chromosome 11 was lost), respectively.

关键词：水稻种植技术分子生物学杂交技术染色体

Tumor suppressor role of mi R-133a in gastric cancer by repressing IGF1R

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World Journal of Gastroenterology 2015年第10期21卷 2949-2958页

作者： yu gong Jun Ren Kun Liu Li-Ming Tang Department of Gastrointestinal Surgery Nanjing Medical University Affiliated Changzhou No. 2 People’s Hospital

AIM:To investigate the function and mechanism of mi R-133a in gastric cancer(GC)and its relationship with clinicopathological characteristics of ***:A total of 105 GC patients who underwent surgical resection as primary treatment were selected for this ***-time quantitative reverse transcriptase polymerase chain(q RT-PCR)was used to examine the expression levels of mi R-133a in human GC and adjacent non-tumor tissues,as well as in GC cell lines(SGC-7901,BGC-823,MGC-803,and AGS)and a human gastric mucosal epithelial cell line(GES-1).The biological role of mi RNA(mi R)-133a was assessed in the GC cell lines using MTT,apoptosis,migration and invasion,and colony formation assays,and xenograft tumorigenesis.q RT-PCR and western blot analyses were used to evaluate the potential target gene expression of mi ***’s correlation was calculated to evaluate the correlation between mi R-133a and insulinlike growth factor 1 receptor(IGF1R)*** regulation of IGF1R by mi R-133a was verified using the luciferase reporter ***:In 80%of the 105 GC patients,the mean expression of mi R-133a was significantly downregulated in tumor tissues compared with adjacent normal tissues(1.215±0.1477 vs 3.093±0.4104,P<0.0001).Downregulation of mi R-133a was significantly correlated with the degree of differentiation(P=0.01),local invasion(P=0.001)and TNM stage(P=0.02)in GC *** with a control construct,forced expression of mi R-133a in GC cell lines inhibited proliferation(0.4787±0.0219 vs 0.7050±0.0147,P=0.0013 in SGC-7901 cells;and 0.5448±0.0085vs 0.7270±0.0084,P=0.001 in MGC-803 cells);migration(0.6333±0.0233 vs 1.037±0.0584,P=0.003 in SGC-7901 cells;0.6126±0.0311 vs 1.024±0.0456,P=0.0017 in MGC-803 cells);and invasion(0.613±0.0399 vs 1.033±0.0278,P=0.0013 in SGC-7901 cells;0.7433±0.0221 vs 1.017±0.0311,P=0.002 in MGC-803 cells).It also induced apoptosis(18.19%±0.2483%vs 5.887%±0.3837%,P<0.0001 in SGC-7901 cells;22.69%±0.7846%vs9.347%±0.301

关键词： Gastric cancer mi R-133a Tumor suppressor Insulin-

Tensile behavior and deformation mechanism of quenching and partitioning treated steels at different deforming temperatures

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Journal of Iron and Steel Research International 2017年第11期24卷 1104-1108页

作者： Lian bo Luo Wei Li yu gong Li Wang Xue-jun Jin Institute of Advanced Steels and Materials School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Development and Application Technology of Automotive Steels Baosteel Research InstituteShanghai 201900China

The effects of deforming temperatures on the tensile behaviors of quenching and partitioning treated steels were investigated. It was found that the ultimate tensile strength of the steel decreased with the increasing temperature from 25 to 100 ℃, reached the maximum value at 300 ℃, and then declined by a significant extent when the temperature further reached 400 ℃. The total elongations at 100, 200 and 300 ℃are at about the same level. The steel achieved optimal mechanical properties at 300 ℃due to the proper transformation behavior of retained austenite since the stability of retained austenite is largely dependent on the deforming temperature. When tested at 100 and 200 ℃, the retained aus tenite was reluctant to transform, while at the other temperatures, about 10 vol. % of retained aus- tenite transformed during the tensile tests. The relationship between the stability of retained austenite and the work hardening behavior of quenching and partitioning treated steels at different deforming temperatures was also studied and discussed in detail. In order to obtain excellent mechanical properties, the stability of retained austenite should be carefully controlled so that the effect of transforma tion-induced plasticity could take place continuously during plastic deformation.

关键词： Quenching and partitioning treated steel Mechanical property Deforming temperature Retained austenite Work hardening behavior

Characteristics of compressible flow of supercritical kerosene

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Acta Mechanica Sinica 2012年第1期28卷 8-13页

作者： Feng-Quan Zhong Xue-Jun Fan Jing Wang gong yu Jian-Guo Li Institute of Mechanics Chinese Academy of Sciences100190 BeijingChina

In this paper, compressible flow of aviation kerosene at supercritical conditions has been studied both numerically and experimentally. The thermophysical properties of supercritical kerosene are calculated using a 10- species surrogate based on the principle of extended corresponding states （ECS）. Isentropic acceleration of supercritical kerosene to subsonic and supersonic speeds has been analyzed numerically. It has been found that the isentropic relationships of supercritical kerosene are significantly dif- ferent from those of ideal gases, A two-stage fuel heating and delivery system is used to heat the kerosene up to a tem- perature of 820 K and pressure of 5.5 MPa with a maximum mass flow rate of 100 g/s. The characteristics of supercritical kerosene flows in a converging-diverging nozzle （Laval nozzle） have been studied experimentally. The results show that stable supersonic flows of kerosene could be established in the temperature range of 730 K-820 K and the measurements in the wall pressure agree with the numerical calculation.

关键词： Supercritical kerosene - Compressible flow Laval nozzle Isentropic process

Field experiments on quantifying the contributions of Coreopsis canopies and roots to controlling runoff and erosion on steep loess slopes

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Journal of Mountain Science 2023年第5期20卷 1402-1423页

作者： gong yu-wei yu Hai-jun TIAN Pei GUO Wen-zhao CHEN Lin SHEN Ding-tao Key Laboratory for Geographical Process Analysis&Simulation of Hubei Province Central China Normal UniversityWuhan 430079China China Institute of Water Resources and Hydropower Research Beijing 100038China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau/Institute of Water and Soil Conservation Northwest A&F UniversityYangling 712100China Department of Environmental Sciences University of California RiversideRiversideCA 92521USA

Grass recovery is often implemented in the loess area of China to control ***,the effect mechanisms of grass cover on runoff erosion dynamics on steep loess hillslopes is still not *** the typical forage species(Coreopsis)in semiarid areas as subject,this study quantified the effects of canopies and roots on controlling slope runoff and erosion.A series of field experiments were conducted in a loess hilly region of *** plots(5 m length,2 m width,25°slope gradient)constructed with three ground covers(bare soil;Coreopsis with intact grass;only roots of Coreopsis),were applied with simultaneous simulated rainfall(60mm h^(-1))and upslope inflow(10,30,50,70,90L min^(-1)).The results showed that compared with bare soil,intact grass significantly reduced runoff and soil loss rates by 16.6% and 62.4% on average,and decreased soil erodibility parameter by 66.3%.As inflow rate increased,the reductions in runoff and soil loss rates increased from 2.93 to 14.00 L min^(-1)and 35.11 to 121.96 g m^(-2)min^(-1),*** relatively contributed 66.7% to lowering flow velocity,turbulence,weakening erosive force and increasing hydraulic *** played a predominant role in reducing soil loss and enhancing soil antierodibility,with relative contributions of 78.8% and 73.8%.Furthermore,the maximum erosion depth reduced by Coreopsis was at the upper slope section which was previously eroded the *** results demonstrated the efficiency of Coreopsis cover in controlling runoff and erosion on steep loess slopes,especially under large inflow rates and at upper slope *** suggest protecting Coreopsis with intact grass at upper slope sections,while the aboveground grass biomass can be used for grazing or harvesting at middle and lower slope sections,with roots reserved.

关键词： Steep loess hillslopes Soil erosion Rill development Runoff hydraulics Spatial variations Coreopsis