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Nuclear Science and Techniques 2023年第9期34卷 50-57页

作者： Wei Chen Long Ma jin-hui Chen Huan-Zhong Huang Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China University of California Los AngelesCA 90095USA

The sensitivity of an experiment to detect the Majorana neutrino mass via neutrinoless double-beta decay(0νββ) strongly depends on the rate of background events that can mimic this decay. One major source of this background is the radioactive emissions from the laboratory environment. In our study, we focused on assessing the background contributions from environmental gamma rays, neutrons, and underground muons to the jinping bolometric demonstration experiment. This experiment uses an array of lithium molybdate crystal bolometers to probe the potential 0νββ decay of the100Mo isotope at the China jinping Underground Laboratory. We also evaluated the shielding effectiveness of the experimental setup through an attenuation study. Our simulations indicate that the combined background from environmental gamma rays, neutrons, and muons in the relevant100Mo 0νββ Q-value region can be reduced to approximately 0.003 cts/kg/keV/yr.

关键词： Neutrinoless double-beta decay Geant4 CUPID

Numerical simulation of the drag and heat-transfer characteristics around and through a porous particle based on the lattice Boltzmann method

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Particuology 2021年第5期19卷 99-107页

作者： Mingyue Zhang Qiuyang Zhao Zujie Huang Lei Chen hui jin State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China

Porous particle flow is universal in nature and ***,in previous numerical simulations,porous particles have usually been assumed to be *** is necessary to study the flow and heat-transfer characteristics around porous particles because they are greatly different from those of impermeable *** this study,two-dimensional steady flow and heat transfer around and through a porous particle with a constant temperature placed in a cold fluid were numerically *** effects of the Reynolds number(Re)and Darcy number(Da)on the flow and heat-transfer characteristics were investigated in *** investigated ranges of the parameters were 10≤Re≤40 and 10^(−6)≤Da≤10^(−2).It is sophisticated to simulate porous particles with traditional simulation methods because of their complicated ***,the lattice Boltzmann method was used to solve the generalized macroscopic governing equations because of its *** drag coefficient decreased with increasing Re or Da,but the decrease was not prominent in the range 10^(−6)≤Da≤10^(−4).The heat-transfer efficiency of the front surface was much stronger than that of the rear *** heat-transfer efficiency between the particle and the fluid increased with increasing Re or ***,for 10^(−6)≤Da≤10^(−4),the increase was not prominent and the heat-transfer enhancement ratio was slightly larger than ***,the effect of Da became more prominent at larger *** addition,new correlations for the drag coefficient and surface-averaged Nusselt number were obtained based on the simulated results.

关键词： Porous particle Darcy-Brinkman-Forchheimer model Flow and heat-transfer characteristics Lattice Boltzmann method Correlation

Evaluation of stability and catalytic activity of Ni catalysts for hydrogen production by biomass gasification in supercritical water

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Carbon Resources Conversion 2019年第1期2卷 95-101页

作者： Youjun Lu hui jin Rui Zhang State Key Laboratory of Multiphase Flow in Power Engineering(SKLMFPE) Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Supercritical water gasification is a promising technology for wet biomass *** this paper,Ni and other metal catalysts were synthesized by wet *** stability and catalytic activities of Ni catalysts were ***,catalytic activities of Ni,Fe,Cu catalysts supported on MgO were tested using wheat straw as raw material in a batch reactor at 723 K and water density of 0.07 cm^(3)/*** results showed that the order of metal catalyst activity for hydrogen generation was Ni/MgO>Fe/MgO>Cu/***,the influence of different supports on Ni catalysts performance was *** results showed that the order of the Ni catalysts’activity with different supports was Ni/MgO>Ni/ZnO>Ni/Al_(2)O_(3)>Ni/ZrO_(2).Finally,the effects of Ni loading and the amount of Ni catalyst addition on hydrogen production,and the stability of Ni/MgO catalyst were *** was found that serious deactivation of Ni catalyst in the process of supercritical water gasification took *** if carbon deposited on the catalyst surface was removed by high temperature calcination and the catalyst was reduced with hydrogen,the activity of used catalyst was only partially restored.

关键词： Ni catalyst Deactivation Biomass gasification Supercritical water Hydrogen production

Protection against hepatic ischemia/reperfusion injury via downregulation of toll-like receptor 2 expression by inhibition of Kupffer cell function

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World Journal of Gastroenterology 2005年第28期11卷 4423-4426页

作者： jin-Xiang Zhang He-Shui Wu Yang Wang hui Wang jin-hui Zhang Qi-Chang Zheng Department of Emergency Surgery Union Hospital Tongji Medical CollegeHuazhong University of Science and Technology Wuhan 430030Habei Province China Hereditary Department Tongji Medical CollegeHuazhong University of Science and Technology Wuhan 430030Habei Province China Department of General Surgery Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 Hubei Province China

AIM： To elucidate the mechanism of liver protection by inhibition of Kupffer cells （KCs） function.METHODS： All the animals were randomly divided into three groups. Blockade group （gadolinium chloride solution （GdCl3） injection plus ischemia/reperfusion （I/R） injury）：GdCl3 solution was injected once every 24 h for 2 d via the tail vein before I/R injury. Non-blockade group （saline solution injection plus I/R injury）： saline instead of GdCl3 as a control was injected as in the blockade group. Sham group： saline was injected without I/R injury. Liver samples were collected 4 h after blood inflow restoration. The blockade of the function of KCs was verified by immunostaining with an anti-CD68 mAb. Toll-like receptor2 （TLR2） was immunostained with a goat antimouse polydonal anti-TLR2 antibody. Membrane proteins were extracted from the liver samples and TLR2 protein was analyzed by Western blot. Portal vein serum and plasma were taken respectively at the same time point for further detection of the levels of tumor necrosis factor-α （TNF-α） and alanine aminotransferase （ALT）, an indicator of liver function.I/R injury via downregulation of theexpression of TLR2.RESULTS： Compared to non-blockade group, CD^68＋ cells significantly reduced in blockade group （OPTDI, optical density integral）： 32.97±10.55 vs 185.65±21.88, P〈0.01） and the liver function impairment was relieved partially （level of ALT： 435.89±178.37 U/L vs 890.21±272.91 U/L,P〈0.01）. The expression of TLR2 protein in blockade group significantly decreased compared to that in non- group（method of immunohistochemistry, OPDTI： 75.74±17.44 vs 170.58±25.14, P〈0.01; method of Western blot, A value： 125.89±15.49 vs 433.91±35.53, P〈0.02）. The latter correlated with the variation of CD68 staining （r = 0.745,P〈0.05）. Also the level of portal vein TNF-α decreased in blockade group compared to that in non-blockade group （84.45±14.73 ng/L vs 112.32±17.56 ng/L, P〈0.05）, butwas still higher than that in sham group （84.45±14.73

关键词： Toll-like receptor 2 Reperfusion injury Kupffer cell Liver

A preliminary study on the response of marine primary production to monsoon variations in the South China Sea Basic characteristics

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Acta Oceanologica Sinica 2008年第5期27卷 21-35页

作者： WANG hui jin Qihua GAO Shan Chinese Academy of Meteorological Sciences Beijing 100081 China

Seasonal, interannual and interdecadal variations of monsoon over the South China Sea （SCS） directly influence the ocean circulation and the mass transport process, etc. , especially the changes of horizontal circulation pattern and upwelling area. These changes directly influence the nutrient transport and the photosynthesis of phytoplankton, which induce the change of the marine ecosystem in the SCS, including the change of marine primary production in this sea area. On the basis of climatic data for long-time series and primary production estimated by remote sensing, the multi-time scale variations of monsoon, seasonal and interannual variations of primary production, and the response of primary production to monsoon variations were analyzed. Furthermore, the spatio-temporal variations of primary production in different sea areas of the SCS and their relations to the monsoon variations were given. The results showed that the strong southwesterly prevailed over the SCS in summer whereas the vigorous northeasterly in winter. The seasonal primary production in the entire sea area of the SCS also produced a strong peak in winter and a suhpeak in summer. And the seasonal primary production distributions displayed different characteristics in every typical sea area. The variations of the annual and summer averaged primary production in the entire sea area of the SCS showed almost the same rising trend as the intensity of the summer monsoon. Especially for 1998, the summer monsoon reached almost the minimum in the past 54 a when the primary production was also found much lower than any other year （ 1999--2005 ）. The responses of annual primary production to monsoon variation were displayed to different extent in different sea areas of the SCS ; especially it was better in the deep sea basin. Such research activities could be very important for revealing the response of marine ecosystem to the monsoon variations in the SCS.

关键词： South China Sea monsoon primary production

Progress of energy system with chemical-looping combustion

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Chinese Science Bulletin 2009年第6期54卷 906-919页

作者： jin HongGuang HONG hui HAN mao Institute of Engineering Thermophysics Chinese Academy of Sciences Box 2706 Beijing 100190 China

Chemical-looping combustion with zero energy penalty of CO2 separation is a significant breakthrough in resolving energy and environment problems for power generation systems. This paper summarizes the research on energy systems with chemical-looping combustion conducted in recent years, discloses the underlying mechanism of energy release of chemical-looping combustion, describes the trends of the key technology development, and presents the proposed chemical-looping combustion thermal cycles. This paper may provide a new direction to the synthesis of the next-generation energy system compatible with environment.

关键词：循环燃烧能源系统化学环境问题发电系统能量释放系统兼容 CO2

Enhancement of oral bioavailability and immune response of Ginsenoside Rh2 by co-administration with piperine

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Chinese Journal of Natural Medicines 2018年第2期16卷 143-149页

作者： jin Zhao-hui QIU Wen LIU hui JIANG Xue-Hua WANG Ling West China School of Pharmacy Sichuan University Chengdu 610041 China Department of Pharmacy West China Hospital Chengdu 610041 China Lanzhou University Second Hospital Lanzhou 730030 China

Ginsenoside Rh2(Rh2)is one of the major bioactive ginsenosides in Panax ***,the oral bioavailability of Rh2 is low,with P-glycoprotein(P-gp)and CYP3A4 being reported to be the main *** purpose of the present study was to determine the enhancing effect of piperine on the oral bioavailability as well as bioactivity of *** inhibitory effect of piperine on P-gp and CYP3A4 was determined using a Caco-2 monolayer model and a recombinant CYP3A4 metabolic system,*** pharmacokinetics of oral Rh2(10 mg·kg^(-1))administered alone or in combination with piperine(10 and 20 mg·kg^(-1))was performed in *** immune boosting effect of Rh2 was assessed in rats by measuring IL-12 level after treated by Rh2 alone or co-administered with *** results indicated that piperine significantly increased the permeability of Rh2 and inhibited the metabolism of *** pharmacokinetic study results showed that the AUC of Rh2 was significantly increased in combination with piperine at high dose(20 mg·kg^(-1))when compared to the control group,with relative bioavailability of 196.8%.The increase of Rh2 exposure led to increased serum levels of *** conclusion,piperine may be used as a bioenhancer to improve pharmacological effect of Rh2 when given orally.

关键词： Panax Ginseng Ginsenoside Rh2 Piperine Immune modulation Bioenhaneer

A brief review of antimatter production

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Frontiers of physics 2012年第6期7卷 637-646页

作者： Yu-Gang Ma jin-hui Chen Liang Xue Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100080China

In this article, we present a brief review of the discoveries of kinds of antimatter particles, including positron （^-e）, antiproton （^-p）, antideuteron （^-d） and antihelium-3 （3^-He）. Special emphasis is put on the discovery of the antihypertriton（∧^3^-H） and antihelium-4 nucleus （4^-He, or ^-α） which were reported by the RHIC-STAR experiment very recently. In addition, brief discussions about the effort to search for antinuclei in cosmic rays and study of the longtime confinement of the simplest antimatter atom, antihydrogen are also given. Moreover, the production mechanism of anti-light nuclei is introduced.

关键词： antimatter,^-e,^-p,^-d 3^-H ∧^3^-H 3^-He 4^-He

BPR-UserRec:a personalized user recommendation method in social tagging systems

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The Journal of China Universities of Posts and Telecommunications 2013年第1期20卷 122-128页

作者： YANG Tan CUI Yi-dong jin Yue-hui State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

Social tagging is one of the most important characteristics of Web 2.0 services, and social tagging systems （STS） are becoming more and more popular for users to annotate, organize and share items on the Web. Moreover, online social network has been incorporated into social tagging systems. As more and more users tend to interact with real friends on the Web, personalized user recommendation service provided in social tagging systems is very appealing. In this paper, we propose a personalized user recommendation method, and our method handles not only the users＇ interest networks, but also the social network information. We empirically show that our method outperforms a state-of-the-art method on real dataset from *** dataset and Douban.

关键词： social tagging systems user recommendation tensor factorization

Weighted Least Squares Method for the Accelerated Failure Time Model with Auxiliary Covariates

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Acta Mathematica Sinica,English Series 2019年第7期35卷 1163-1178页

作者： Ling hui jin Yan Yan LIU Lang WU School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China City College Wuhan University of Science and Technology Wuhan 430083 P. R. China Department of Statistics University of British Columbia Vancouver Canada

This paper deals with the analysis of accelerated failure time model when the primary covariate is subject to missing. We assume that the true covariate is measured precisely on a randomly chosen validation set, whereas auxiliary information for primary covariate is available to all study subjects. The asymptotic properties for the proposed estimator are developed and the simulation studies show that the efficiency gain is remarkable compared to the method using only the validation sample. A real example is also provided as an illustration.

关键词： Survival analysis accelerated failure time model auxiliary covariates validation sample weighted least squares estimation