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Journal of Semiconductors 2010年第3期31卷 62-65页

作者：黄寓洋刘惠春 Wasilewski z R Buchanan M laframboise S R 杨晨崔国新边历峰杨辉张耀辉 Institute of Semiconductors Chinese Academy of Sciences Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Institute for Microstructural Sciences National Research CouncilOttawa KIA 0R6Canada

Our latest research results on GaAs-A1GaAs multiple quantum well spatial light modulators are presented. The thickness uniformity of the epitaxial layers across the 3-inch wafer grown by our molecular beam epitaxy is better than 0.1% and the variation of cavity resonance wavelength within the wafer is only 0.9 nm. A contrast ratio （CR） of 102 by varying bias voltage from 0 to 6.7 V is achieved after fine tuning the cavity by etching an adjust layer. Both theoretical and experimental results demonstrate that incorporating an adjust layer is an effective tuning method for obtaining high CR.

关键词： spatial light modulator multiple quantum well uniformity contrast ratio adjust layer matching condition

Prospects for a multi-TeV gamma-ray sky survey with the lHAASO water Cherenkov detector array

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Chinese Physics C 2020年第6期44卷 123-132页

作者： F.Aharonian V.Alekseenko Q.An Axikegu l.X.Bai Y.W.Bao D.Bastieri9 X.J.Bi H.Cai zhe Cao zhen Cao J.Chang J.F.Chang X.C.Chang S.P.Chao B.M.Chen J.Chen l.Chen l.Chen M.l.Chen M.J.Chen Q.H.Chen S.H.Chen S.z.Chen T.l.Chen X.l.Chen Y.Chen N.Cheng Y.D.Cheng S.W.Cui X.H.Cui Y.D.Cui B.z.Dai H.l.Dai z.G.Dai Danzengluobu B.D'Ettorre Piazzoli J.Fang J.H.Fan Y.z.Fan C.F Feng l.Feng S.H.Feng Y.l.Feng B.Gao Q.Gao W.Gao M.M.Ge l.S.Geng G.H.Gong Q.B.Gou M.H.Gu Y.Q.Guo Y.Y.Guo Y.A.Han H.H.He J.C.He M.Heller S.l.He Y.He C.Hou D.H.Huang Q.l.Huang W.H.Huang X.T.Huang H.B.Hu S.Hu H.Y.Jia K.Jiang F.Ji C.Jin X.l.Ji K.levochkin E.W.liang Y.F liang Cheng li Cong li F.li H.li H.B.li H.C.li H.M.li J.li K.li W.l.li X.li X.R.li Y.li z.li z.li B.liu C.liu D.liu H.D.liu H.liu J.liu J.Y.liu M.Y.liu R.Y.liu S.M.liu W.liu Y.N.liu z.X.liu W.J.long R.lu H.K.lv B.Q.Ma l.l.Ma J.R.Mao A.Masood X.H.Ma W.Mitthumsiri T.Montaruli Y.C.Nan P.Pattarakijwanich z.Y.Pei B.Q.Qiao M.Y.Qi D.Ruffolo V.Rulev A.Sáiz l.Shao O.Shchegolev X.D.Sheng J.R.Shi Y.Stenkin V.Stepanov z.B.Sun P.H.T.Tam z.B.Tang W.W.Tian D.D.Volpe C.Wang H.Wang H.G.Wang J.C.Wang l.Y.Wang W.Wang W.Wang X.G.Wang X.Y.Wang X.J.Wang Y.D.Wang Y.J.Wang Y.N.Wang Y.P.Wang z.Wang z.H.Wang z.X.Wang D.M.Wei J.J.Wei T.Wen C.Y.Wu H.R.Wu S.Wu W.X.Wu X.F.Wu G.M.Xiang G.Xiao G.G.Xin Y.Xing R.X.Xu l.Xue D.H.Yan C.W.Yang F.F.Yang l.l.Yang M.J.Yang R.z.Yang S.B.Yang Y.H.Yao z.G.Yao Y.M.Ye l.Q.Yin N.Yin X.H.You z.Y.You Q.Yuan Y.H.Yu z.J.Jiang H.D.zeng T.X.zeng W.zeng z.K.zeng M.zha B.B.zhang H.M.zhang H.Y.zhang J.l.zhang J.W.zhang l.zhang P.F.zhang P.P.zhang S.R.zhang S.S.zhang X.zhang X.P.zhang Yi zhang Yong zhang Y.F.g zhang B.zhao J.zhao l.zhao l.z.zhao F.zheng Y.zheng J.N.zhou P.zhou R.zhou X.X.zhou C.G.zhu F.R.zhu H.zhu K.J.zhu X.zuo Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduShichuanChina University of Science and Technology of China 230026 HefeiAnhuiChina Tsinghua University 100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National Space Science Center Chinese Academy of Sciences100190 BeijingChina School of Physics Peking University100871 BeijingChina Center for Astrophysics Guangzhou University510006 GuangzhouGuangdongChina Sun Yat-sen University 519000 ZhuhaiGuangdongChina Shool of Physics and Technology Guangxi University530004 NanningGuangxiChina Hebei Normal University 050024 ShijiazhuangHebeiChina School of Physics and Engineering Zhengzhou University450001 ZhengzhouHenanChina Nanjing University 210023 NanjingJiangsuChina Key laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210034 NanjingJiangsuChina Institute of Frontier and Interdisciplinary Science Shandong University266237 QingdaoShandongChina Shanghai Astronomical Observatory Chinese Academy of Sciences200030 ShanghaiChina School of Physical Science and Technology Southwest Jiaotong University610031 ChengduSichuanChina Sichuan University 610065 ChengduSichuanChina Key laboratory of Cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina School of physics and technology Wuhan university430072 WuhanChina Yunnan University 650091 KunmingYunnanChina Yunnan Astronomical Observatories Chinese Academy of Sciences650216 KunmingYunnanChina Institute for Nuclear Research Russian Academy of SciencesMoscowRussia Département de Physique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde GenéveGenevaSwitzerland Department of Physics Faculty of ScienceMahidol UniversityBangkokThailand Dublin Institute for Advanced Studies 31 Fitzwilliam PlaceDublin 2Ireland Max-Planc

The Water Cherenkov Detector Array(WCDA) is a major component of the large High Altitude Air Shower Array Observatory(lHAASO), a new generation cosmic-ray experiment with unprecedented sensitivity, currently under construction. WCDA is aimed at the study of TeV γ-rays. In order to evaluate the prospects of searching for TeV γ-ray sources with WCDA, we present a projection of the one-year sensitivity of WCDA to TeV γ-ray sources from TeVCat using an all-sky approach. Out of 128 TeVCat sources observable by WCDA up to a zenith angle of 45°, we estimate that 42 would be detectable in one year of observations at a median energy of 1 TeV. Most of them are Galactic sources, and the extragalactic sources are Active Galactic Nuclei(AGN).

关键词： TeVγ-ray astronomy observational prospect lHAASO-WCDA

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基于组件的智能交通信息系统设计研究

计算机工程与应用 2003年第19期39卷 47-50页

作者：朱立新中国科学院自动化研究所智能控制系统工程研究中心北京100080

随着智能交通系统(ITS)的飞速发展,交通功能的不断增加,与ITS配套的信息系统日趋庞大复杂。传统的软件工程设计思想,不能满足日益增长的ITS信息系统发展的需要。该文提出了软件工程中基于组件发展(CBD)的思想规划设计ITS信息系统。详细... 详细信息

随着智能交通系统(ITS)的飞速发展,交通功能的不断增加,与ITS配套的信息系统日趋庞大复杂。传统的软件工程设计思想,不能满足日益增长的ITS信息系统发展的需要。该文提出了软件工程中基于组件发展(CBD)的思想规划设计ITS信息系统。详细阐述了组件技术构造ITS信息系统各部分的方法,并以统一建模语言(UMl)和形式化语言z描述了组件构成。最后,指出基于组件发展思想是下一步构造组件库的必然方法,是将来ITS信息系统以体系结构为中心和模式化发展的基础。

关键词：智能交通系统信息系统组件思想统一建模语言 z语言组件库

Action-oriented obesity counseling attains weight stabil.zation and improves liver enzymes among overweight and obese children and adolescents

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Open Journal of Pediatrics 2012年第3期2卷 236-243页

作者： Allison C. Sylvetsky Jean A. Welsh Stephanie M. Walsh miriam B. Vos Children’s Healthcare of Atlanta at Egleston Atlanta USA Department of Pediatrics School of Medicine Emory University Atlanta USA Nutrition and Health Sciences Program Division of Biological and Biomedical Sciences Laney Graduate School Emory University Atlanta USA

Introduction: Pediatricians are encouraged to promote behavior modification to reduce childhood obesity and its co-morbidities, yet the effectiveness of office counseling is unclear. We aimed to evaluate if a low-intensity intervention (action-oriented counseling) in a clinic setting results in weight stabil.zation, and if the effect is modified by a diagnosis of non-alcoholic fatty liver disease (NAFlD). We hypothesized that patients with NAFlD would be more motivated to adhere to the lifestyle goals set in clinic, due to the diagnosis of an obesity-related condition;and, would therefore achieve greater weight reduction compared to similarly overweight and obese patients without a diagnosis of NAFlD. Methods: A retrospective chart review was conducted on 73 (35 male, 38 female) overweight and obese patients (BMI ≥ 85th percentile) attending a pediatric GI clinic between January 2006 and October 2011. Analysis was conducted to determine if lifestyle goals discussed with the patient at each clinic visit were associated with improved BMI, BMI z-score, and liver enzymes. Treatment outcomes among NAFlD patients and similarly obese patients without NAFlD were compared using t-tests and chi-square tests. Results: Of the children evaluated, 74.0% achieved a reduction or stabil.zation in BMI z-score after 3 months of follow-up. Among NAFlD patients, liver enzymes improved in 72% of those who were able to stabil.ze or reduce their BMI and among 43% of those who gained weight. Treatment outcome did not significantly differ based on having a diagnosis of NAFlD, although there was a trend towards greater improvements. Conclusion: Our study suggests that action oriented counseling including goal-setting in a low intensity, clinic based approach is effective in improving patient BMI, in the presence or absence of an obesity-related co-morbidity, such as NAFlD. Further, we demonstrated that lifestyle modification led to improvement of liver enzymes in NAFlD patients and may result

关键词： Obesity Non-Alcoholic Fatty liver Disease lifestyle Behavior Change

Rice Interploidy Crosses Disrupt Epigenetic Regulation, Gene Expression, and Seed Development

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Molecular Plant 2018年第2期11卷 300-314页

作者： limei Wang Jingya Yuan Yujie Ma Wu Jiao Wenxue Ye Dong-lei Yang Chuandeng Yi z. Jeffrey Chen State Key laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University 1 Weigang Road Nanjing 210095 China Department of Molecular Biosciences Institute for Cellular and Molecular Biology Center for Computational Biology and Bioinformatics The University of Texasat Austin Austin TX 78712 USA Jiangsu Key laboratory of Crop Genetics and Physiology Yangzhou University Yangzhou 225009 China

Seed development in angiosperms requires a 2：1 maternal-to-paternal genome ratio （2m：lp） in the endo- sperm. When the ratio is disrupted, the seed development is impaired. Rice interploidy crosses result in endosperm failures, but the underlying molecular mechanisms remain unclear. Here, we report that the defective endosperm in rice interploidy crosses was associated with nonadditive expression of small RNAs and protein-coding genes. Interestingly, 24-nt small interfering RNAs were enriched in the 5＇ and 3＇ flanking sequences of nonadditively expressed genes in the interploidy crosses and were negatively associated with the expression of imprinted genes. Furthermore, some PRC2 family genes and DNA methylaUon-related genes including OsMETlb and OsCMT3a were upregulated in the 2x4 cross （polli- nating a diploid ＂mother＂ with a tetraploid ＂father＂） but repressed in the reciprocal cross. These different epigenetic effects could lead to precocious or delayed cellularization during endosperm development. Notably, many endosperm-preferred genes, including starch metabolic and storage protein genes during grain filling, were found to be associated with DNA methylation or H3K27me3, which are repressed in both 2×4 and 4 ×2 crosses. WUSCHEl homeobox2 （WOX2）-Iike （WOX2l）, an endosperm-preferred gene, was expressed specifically in the rice endosperm, in contrast to WOX2 expression in the Arabidopsis embryo. Disruption of WOX2l in transgenic rice by CRISPR/cas9-mediated gene editing blocked starch and protein accumulation, resulting in seed abortion. In addition to gene repression, disrupting epigenetic process in the interploidy crosses also induced expression of stress-responsive genes. Thus, maintaining the 2m：lp genome ratio in the endosperm is essential for normal grain development in rice and other cereal crops.

关键词： seed polyploidy small RNA gene expression endosperm epigenetics

Photon polarization effects in polarized electron–positron pair production in a strong laser field

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Matter and Radiation at Extremes 2022年第1期7卷 5-14页

作者： Ya-Nan Dai Bai-Fei Shen Jian-Xing li Rashid Shaisultanov Karen z.Hatsagortsyan Christoph H.Keitel Yue-Yue Chen Department of Physics Shanghai Normal UniversityShanghai 200234China State Key laboratory of High Field laser Physics and cas Center for Excellence in Ultra-intense laser Science Shanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)Shanghai 201800China School of Physics Xi’an Jiaotong UniversityXi’an 710049China Max-Planck-Institut fur Kernphysik Saupfercheckweg 169117 HeidelbergGermany Helmhol.z-zentrum Dresden-Rossendorf Bautzner Landstraße 40001328 DresdenGermany

Deep understanding of the impact of photon polarization on pair production is essential for the efficient generation of laser-driven polarized positron beams and demands a complete description of polarization effects in strong-field QED *** fully polarization-resolved Monte Carlo simulations,we investigate correlated photon and electron(positron)polarization effects in the multiphoton Breit–Wheeler pair production process during the interaction of an ultrarelativistic electron beam with a counterpropagating elliptically polarized laser *** show that the polarization of e−e+pairs is degraded by 35%when the polarization of the intermediate photon is resolved,accompanied by an∼13%decrease in the pair ***,in this case,the polarization direction of energetic positrons at small deflection angles can even be reversed when high-energy photons with polarization parallel to the laser electric field are involved.

关键词： polarized positron resolved

Cenozoic plants from Tibet:An extraordinary decade of discovery,understanding and implications

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Science China Earth Sciences 2023年第2期66卷 205-226页

作者： zhekun zHOU Jia lIU linlin CHEN Robert A.SPICER Shufeng lI Jian HUANG Shitao zHANG Yongjiang HUANG linbo JIA Jinjin HU Tao SU cas Key laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla666303China cas Key laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming650204China School of Environment Earth and Ecosystem SciencesThe Open UniversityMilton KeynesMK76AAUK Faculty of land Resource Engineering Kunming University of Science and TechnologyKunming650093China State Key laboratory of Paleobiology and Stratigraphy Nanjing Institute of Geology and PaleontologyChinese Academy of SciencesNanjing210008China

Plant fossils play an important role in understanding landscape evolution across the Tibetan Region,as well as plant diversity across wider eastern *** the last decade or so,paleobotanical investigations within the Tibet Region have led to a paradigm shift in our understanding of how the present plateau formed and how this affected the regional climate and *** is because:(1)Numerous new taxa have been *** all the Cenozoic records of new plant fossil species reported from the Tibet(Xizang)Autonomous Region 45 out of 63(70%)were documented after *** these,many represent the earliest records from Asia,or in some cases worldwide,at the genus or family level.(2)These fossils show that during the Paleogene,the region now occupied by the Tibetan Plateau was a globally significant floristic exchange *** on paleobiogeographic studies,grounded by fossil evidence,there are four models of regional floristic migration and exchange,i.e.,into Tibet,out of Tibet,out of India and into/out of Africa.(3)Plant fossils evidence the asynchronous formation histories for different parts of the Tibetan *** most of the Paleogene,there was a wide east-west trending valley with a subtropical climate in central Tibet bounded by high(>4 km)mountain systems,but that by the early Oligocene the modern high plateau had begun to form by the rise of the valley *** reconstructions using radiometrically-dated plant fossil assemblages in southeastern Tibet show that by the earliest Oligocene southeastern Tibet(including the Hengduan Mountains)had reached its present elevation.(4)The coevolution between vegetation,landform and paleoenvironment is evidenced by fossil records from what is now the central Tibetan *** the Paleocene to Pliocene,plant diversity transformed from that of tropical,to subtropical forests,through warm to cool temperate woodland and eventually to deciduous shrubland in response to landscape evolution from a seas

关键词： Tibetan Plateau Cenozoic Paleobotany Flora Central valley Biodiversity

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Effect of surface layer softening from previous electrochemical corrosion on electrochemical cold drawing of Q235 steel bar

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Journal of Iron and Steel Research International 2022年第5期29卷 819-835页

作者： J.l.Guo T.J.Chen State Key laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou730050GansuChina

The effects of H_(2)SO_(4)concentration and current in electrochemical corrosion on surface layer softening or plasticizing of Q235 steel bar and their effects on subsequent electrochemical cold drawing(ECD)were *** results indicate that the electrochemical corrosion can soften or plasticize the surface layer of Q235 steel bar and then make the subsequent ECD be conducted more *** softening degree and thickness of the surface layer are continuously enhanced with increasing corrosion rate,i.e.,increasing H_(2)SO_(4)concentration or current,due to the generation of more vacancy clusters in deeper regions of surface *** vacancy clusters then relax dislocations through being absorbed during ECD,and the formation and movement of additional dislocation flux are thereby enhanced,resulting in the further obvious decrease in the drawing *** is also due to the enhanced formation and movement of additional dislocation flux that the dislocation density and thus the hardness of the surface layer are decreased,as well as that the texture structure is *** behaviors are enhanced as the corrosion rate increases.

关键词： Electrochemical corrosion Electrochemical cold drawing Surface layer softening Vacancy Additional dislocation flux

Characterization for Fusion Candidate Vanadium Alloys

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Plasma Science and Technology 2004年第4期6卷 2395-2399页

作者： T.Muroga T.Nagasaka J.M.Chen z.Y.Xu Q.Y.Huang Y.C.Wu NationalInstituteforFusionScience Toki509-5292Japan SouthwesternInstituteofPhysics Chengdu610041China InstituteofPlasmaPhysics ChineseAcademyofSciencesHefei230031China

This paper summarizes recent achievements in the characterization ofcandidate vanadium alloys obtained for fusion in the framework of the Japan-China Core UniversityProgram. National Institute for Fusion Science (NIFS) has a program of fabricating high-purityV-4Cr-4Ti alloys. The resulting products (NIFS-HEAT-1,2), were characterized by various researchgroups in the world including Chinese partners. South Western Institute of Physics (SWIP) fabricateda new V-4Cr-4Ti alloy (SWIP-Heat), and carried out a comparative evaluation of hydrogenembrittlement of NIFS-HEATs and SWIP-Heat. The tensile test of hydrogen-doped alloys showed that theNIFS-HEAT maintained the ductility to relatively high hydrogen levels. The comparison of the datawith those of previous studies suggested that the reduced oxygen level in the NIFS-HEATs should beresponsible for the increased resistance to hydrogen embrittlement. Based on the chemical analysisdata of NIFS-HEATs and SWIP-Heats, neutron-induced activation was anal.zed in Institute of PlasmaPhysics (IPP-cas) as a function of cooling time after the use in the fusion first wall. The resultsshowed that the low level of Co dominates the activity up to 50 years followed by a domination of Nbor Nb and Al in the respective alloys. It was suggested that reduction of Co and Nb, both of whichare thought to have been introduced via cross-contamination into the alloys from the molds usedshould be crucial for reducing further the activation.

关键词： vanadium alloys characterization nuclear fusion