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Journal of Iron and Steel Research International 2015年第9期22卷 827-836页

作者： Fei GAO Fu-xiao YU hai-tao liu zhen-yu liu School of Materials & Metallurgy Northeastern Unversity State Key Laboratory of Rolling and Automation Northeastern University

The hot deformation behavior of ultra purified 17% Cr ferritic stainless steel stabilized with Nb and Ti was investigated using axisymmetric hot compression tests on a thermomechanical *** deformation was carried out at the temperatures ranging from 700 to 1 100℃ and strain rates from 1to *** microstructure was investigated using electron backscattering *** effects of temperature and strain rate on deformation behavior were represented by Zener-Hollomon parameter in an exponent type *** effect of strain was incorporated in the constitutive equation by establishing polynomial relationship between the material constants and strain.A sixth order polynomial was suitable to represent the effect of *** modified constitutive equation considering the effect of strain was developed and could predict the flow stress throughout the deformation conditions except at800℃in 1s-1 and at 700℃in 5and *** the reliability of the modified constitutive equation was possibly ascribed to the increase in average Taylor factor at 800℃in 1s-1 and the increase in temperature at 700℃in 5and10s-1 during hot *** optimum window for improving product quality of the ferritic stainless steels was identified as hot rolling at a low finisher entry temperature of 700℃,which can be achieved in practical production.

关键词： 17%Cr ferritic stainless steel hot deformation flow stress constitutive equation strain compensation

Investigation of the effect of military stress on the prevalence of functional bowel disorders

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World Journal of Gastroenterology 2012年第23期18卷 3004-3007页

作者： Xian-Zhao Yu hai-Feng liu zhen-Xue Sun Department of Gastroenterology General Hospital of Chinese People's Armed Police Forces Bei- jing 100039 China Authorized Outpatient Service of Chinese Peo- ple's Armed Police Headquarters Beijing 100089 China

AIM: To investigate the morbidity of functional bowel disorders (FBD) under military stress conditions in order to lay foundations for the prevention and treatment of this disease. METHODS: Four hundred and fifty-seven soldiers who were assigned to specified services and 471 soldiers who were assigned to routine services were enrolled using cluster sampling, with the latter as a control group. They were surveyed using the Rome Ⅲ FBD standard questionnaire. The FBD symptom question-naire included FBD-related symptoms, severity, dura- tion or attack time, and accompanying symptoms. RESULTS: The morbidity of the military stress group (14.6%) was significantly higher than in the control group (9.98%) ( 2 = 4.585, P < 0.05). The incidence of smoking, abdominal pain and acid regurgitation ( 2 = 4.761, P < 0.05) as well as the ZUNG anxiety/depression scores ( 2 = 7.982, P < 0.01) were also sig- nificantly higher in the military stress group compared with the control group. ZUNG anxiety ( 2 = 11.523, P < 0.01) and depression ( 2 = 5.149, P < 0.05) scores were higher in the FBD group compared with the non-FBD group. The differences in the ZUNG self-rated anxiety and depression scales between the 2 groups were statistically significant ( 2 = 14.482, P < 0.01 and 2 = 6.176, P < 0.05). CONCLUSION: The morbidity of FBD was higher under military stress conditions.

关键词： Military stress Functional bowel disorders Soldier Self-rating anxiety Depression scale

Scheme to Implement Optimal Symmetric 1→2 Universal Quantum Telecloning Through Cavity-Assisted Interaction

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Communications in Theoretical Physics 2008年第11期50卷 1096-1100页

作者： YANG zhen ZHANG Wen-hai HE Juan YE liu School of Physics ＆： Material Science Anhui University Hefei 230039 China Department of Physics ＆ Electronic Engineering Hefei Teachers College Hefei 230601 China Department of Physics Fuyang Normal College Fuyang 236041 China

We propose a scheme to implement the optimal symmetric 1 → 2 universal quantum telecloning through cavity-assisted interaction. In our scheme an arbitrary single atomic state can be telecloned to two single atomic states. And three atoms are trapped in three spatially separated cavities respectively. With a particular multiparticle entangled state acting as a quantum information channel and the trapped single atom acting as a quantum network node for its long-lived internal state, quantum information can be telecloned among nodes and can stored in the nodes.

关键词： telecloning cavity-QED cavity-assisted interaction

微纳尺度光纤布拉格光栅折射率传感的理论研究

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物理学报 2011年第10期60卷 390-394页

作者：梁瑞冰孙琪真沃江海刘德明华中科技大学光电子科学与工程学院武汉430074 华中科技大学下一代互联网接入系统国家工程实验室武汉430074

亚波长直径微纳光纤强倏逝场传输的光学特性,使其对周围介质折射率的变化具有极高的灵敏度.本文提出一种基于微纳尺度光纤布拉格光栅(MNFBG)的折射率传感器,结合微纳光纤倏逝场传输和光纤布拉格光栅(FBG)强波长选择的特性来实现高精度... 详细信息

亚波长直径微纳光纤强倏逝场传输的光学特性,使其对周围介质折射率的变化具有极高的灵敏度.本文提出一种基于微纳尺度光纤布拉格光栅(MNFBG)的折射率传感器,结合微纳光纤倏逝场传输和光纤布拉格光栅(FBG)强波长选择的特性来实现高精度折射率传感,对其制备可行性进行了讨论.论文中对MNFBG折射率传感机理进行了深入的理论分析,并使用OptiGrating软件进行了数值模拟,模拟数据显示MNFBG折射率测量的灵敏度随着光纤半径的减小而增加,其中光纤半径为400nm的MNFBG灵敏度可达到993nm/RIU,相比于包层蚀刻的FBG灵敏度增加了170倍,说明MNFBG对发展微型化、高灵敏度折射率传感器具有良好的应用前景.

关键词：微纳光纤光纤布拉格光栅折射率传感

Potential dependence in electrocatalysis: a theoretical perspective

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Science China Chemistry 2025年第1期 21-25页

作者： Leyu liu Zhaoming Xia Zeyu Wang Yinjuan Chen hai Xiao Department of Chemistry Tsinghua University Fundamental Science Center of Rare Earths Ganjiang Innovation Academy Chinese Academy of Sciences Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou University

Electrocatalysis is a key technology for the new energy era and sustainable development, serving as the interface for interconversion of electrical and chemical energies, which spans a wide spectrum of applications in sustainable energy and environmental engineering. Electrocatalytic reactions including electrochemical CO2reduction reaction （eCO2RR）, hydrogen evolution reaction （HER）, and oxygen evolution/reduction reactions （OER/ORR）, hold essential promise for renewable energy technologies as well as complement the biogeochemical carbon and oxygen cycles.

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Sodium dehydroacetate treatment prolongs the shelf-life of'Kyoho'grape by regulating oxidative stress and DNA methylation

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Journal of Integrative Agriculture 2022年第5期21卷 1525-1533页

作者： GUO Da-long liu hai-nan WANG zhen-guang GUO Li-li ZHANG Guo-hai College of Horticulture and Plant Protection Henan University of Science and TechnologyLuoyang 471023P.R.China Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants Luoyang 471023P.R.China

In this study,we tested the ability of sodium dehydroacetate(SD)to extend the shelf-life of‘Kyoho’*** the different concentrations of SD tested(0,0.01,0.1 and 1.0 mmol L^(-1)),0.01 mmol L^(-1) SD was the most effective in prolonging the shelf-life of‘Kyoho’*** with the control,the weight loss rate,browning index and hydrogen peroxide(H_(2)O_(2))and malonaldehyde contents were significantly lower in the 0.01 mmol L^(-1) SD treatment,whereas the healthy berry rate,berry firmness,total soluble solids(TSS)content,ascorbic acid content and superoxide dismutase(SOD)activity were significantly *** addition,an analysis of‘Kyoho’grape DNA using methylation sensitive amplification polymorphism(MSAP)markers showed that the average DNA methylation level was significantly higher in the 0.01 mmol L^(-1) SD treatment than in the ***,these results indicate that 0.01 mmol L^(-1) SD could be used to extend the shelf-life of‘Kyoho’***,a strong connection between reactive oxygen species(ROS)metabolism and DNA methylation change during storage was revealed.

关键词： grape sodium dehydroacetate DNA methylation MSAP shelf-life

Optimized design of LED freeform lens for uniform circular illumination

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第12期13卷 929-936页

作者： Peng liu Reng-mao WU zhen-rong zhenG hai-feng LI Xu liu State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 China

An optimization method is proposed for designing an LED freeform lens which produces a uniform circular pattern with high energy *** method is composed of three main aspects:design of the initial guess,parameterization of the freeform surface,and construction of the merit *** initial guess is created by solving an ordinary differential equation *** approach of selecting optimization points is introduced for parameterization of the freeform *** merit function is constructed by use of the irradiance uniformity and the efficiency of the *** examples are given,and the results show that the irradiance distribution is well controlled with a maximum uniformity(the relative standard deviation of irradiance,RSD) of 0.0122 and a maximum efficiency of 93.88%.This optimization method can be generalized to design freeform lenses with different lighting patterns or without rotational symmetry.

关键词： Illumination design Lenses Light emitting diode(LED) Non-imaging optics

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改性方法对豆渣膳食纤维的结构影响研究

食品科技 2011年第1期36卷 143-147页

作者：周丽珍孙海燕刘冬李艳唐旭蔚李世敏深圳职业技术学院应用化学与生物技术学院深圳518055

采用X射线衍射(XRD)和红外光谱技术,考察酶解改性、高温蒸煮改性以及高温蒸煮结合酶解改性对豆渣膳食纤维(DF)结构的影响。结合几种改性方法制备豆渣DF,运用XRD及红外光谱技术检测DF的结构特性。结果表明:酶解、高温蒸煮及其结合改性方... 详细信息

采用X射线衍射(XRD)和红外光谱技术,考察酶解改性、高温蒸煮改性以及高温蒸煮结合酶解改性对豆渣膳食纤维(DF)结构的影响。结合几种改性方法制备豆渣DF,运用XRD及红外光谱技术检测DF的结构特性。结果表明:酶解、高温蒸煮及其结合改性方法主要都是影响豆渣DF中的非结晶区结构,或部分破坏结晶区结构,使这些结构组分溶出或转化为水溶性成分溶出,从而达到改性目的;改性方法对豆渣DF的结晶区结构不会完全破坏。此外,XRD技术和红外光谱技术相结合,可作为研究DF的有效技术手段。

关键词：改性膳食纤维 X射线衍射(XRD) 红外光谱

Economics,fundamentals,technology,finance,speculation and geopolitics of crude oil prices:an econometric analysis and forecast based on data from 1990 to 2017

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Petroleum Science 2018年第2期15卷 432-450页

作者： hai-Ling Zhang Chang-Xin liu Meng-zhen Zhao Yi Sun Institutes of Science and Development Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

It is of real and direct significance for China to cope with oil price fluctuations and ensure oil security. This paper aims to quantitatively analyze the specific contribution ratios of the complex factors influencing international crude oil prices and to establish crude oil price models to forecast long-term international crude oil prices. Six explanatory influential variables, namely Dow Jones Indexes, the Organization for Economic Cooperation and Development oil stocks, US rotary rig count, US dollar index, total open interest, which is the total number of outstanding contracts that are held by market participants at the end of each day, and geopolitical instability are specified, and the samples, from January 1990 to August 2017, are divided into six sub-periods. Moreover, the co-integration relationship among variables shows that the contribution ratios of all the variables influencing Brent crude oil prices are in accordance with the corresponding qualitative analysis. Furthermore, from September 2017 to December 2022 outside of the sample, the Vector Autoregressive forecasts show that annually averaged Brent crude oil prices for 2017-2022 would be $53.0, $61.3, $74.4, $90.0, $105.5, and $120.7 per barrel, respectively. The Vector Error Correction forecasts show that annual average Brent crude oil prices for 2017-2022 would be $53.0, $56.5, $58.5, $60.7, $63.0 and $65.4 per barrel, respectively.

关键词： International crude oil prices Fundamental and non-fundamental factors Co-integration theory Vector autoregressive (VAR) Vector error correction (VEC)

Performance of Ag_(2)O/Ag Electrode as Cathodic Electron Acceptor in Microbial Fuel Cell

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Acta Metallurgica Sinica(English Letters) 2017年第12期30卷 1243-1248页

作者： Hong-Yan Dai Hui-Min Yang Xuan Jian Xian liu zhen-hai Liang College of Chemistry and Chemical Engineering Taiyuan University of Technology Department of Municipal and Environmental Engineering Taiyuan College Department of Chemistry Taiyuan Normal University

An Ag2O/Ag electrode was prepared through the electrochemical oxidation of sterling silver. This electrode was used as a cathodic electron acceptor in a microbial fuel cell （MFC）. The Ag2O/Ag electrode was characterized by scanning electron microscopy, X-ray powder diffraction and linear sweep voltammetry. The maximum voltage output of the MFC with the AgaO/Ag cathode was maintained at between 0.47 and 0.5 V in 100 cycles, indicating the good regenerative capacity of the Ag2O/Ag electrode. The overpotential loss for silver oxide was 0.021-0.006 V, and the maximum power output, open circuit potential and short circuit current of the MFC were 1.796 W m^-3, 0.559 V and 9.3375 A m^-3, respectively. The energy required for electrochemical reoxidation ranged from 40% to 55% of the energy produced by the MFC. Results indicated that the AgeO/Ag electrode could be used as a cathodic electron acceptor in MFCs with excellent stability.

关键词： Ag2O/Ag electrode Cathodic electron acceptor Microbial fuel cell Regenerative capacity Overpotential loss Stability