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Synergistic Impacts of Indian Ocean SST and Indo-China Peninsula Soil Moisture on the 2020 Record-breaking Mei-yu

Advances in Atmospheric Sciences 2024年第9期41卷 1735-1750页

作者： Yinshuo DONG Haishan chen Xuan DONG Wenjian HUA wenjun ZHANG Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China School of Atmospheric Sciences Nanjing University of Information Science and TechnologyNanjing 210044China Bureau of Hydrology ChangJiang Water Resources CommissionWuhan 430010China

The Yangtze River basin(YRB)experienced a record-breaking mei-yu season in June‒July *** unique long-lasting extreme event and its origin have attracted considerable *** studies have suggested that the Indian Ocean(IO)SST forcing and soil moisture anomaly over the Indochina Peninsula(ICP)were responsible for this unexpected ***,the relative contributions of IO SST and ICP soil moisture to the 2020 mei-yu rainfall event,especially their linkage with atmospheric circulation changes,remain *** using observations and numerical simulations,this study examines the synergistic impacts of IO SST and ICP soil moisture on the extreme mei-yu in *** show that the prolonged dry soil moisture led to a warmer surface over the ICP in May under strong IO SST *** intensification of the warm condition further magnified the land thermal effects,which in turn facilitated the westward extension of the western North Pacific subtropical high(WNPSH)in June‒*** intensified WNPSH amplified the water vapor convergence and ascending motion over the YRB,thereby contributing to the 2020 *** contrast,the land thermal anomalies diminish during normal IO SST backgrounds due to the limited persistence of soil *** roles of IO SST and ICP soil moisture are verified and quantified using the Community Earth System *** synergistic impacts yield a notable 32%increase in YRB *** findings provide evidence for the combined influences of IO SST forcing and ICP soil moisture variability on the occurrence of the 2020 super mei-yu.

关键词： super mei-yu Indian Ocean SST soil moisture Indochina Peninsula

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A novel photonic crystal vertical cavity surface emitting laser based on coherent coupling

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Chinese Science Bulletin 2010年第2期55卷 111-113页

作者： LIU AnJin QU HongWei XING MingXin chen Wei ZHOU wenjun ZHENG WanHua Nano-Optoelectronics Laboratory Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

We demonstrate a novel oxide confined GaAs-based photonic crystal vertical cavity surface emitting laser (PC-VCSEL) operating at a wavelength of 850 nm based on coherent coupling. A ring-shaped light-emitting aperture is added to the conventional PC-VCSEL, and coherent coupling is achieved between the central defect aperture and the ring-shaped light-emitting aperture. Measurements show that under the continuous-wave (CW) injected current of 20 mA, a high power of 2 mW is obtained, and the side mode suppression ratio (SMSR) is larger than 20 dB. The average divergence angle is 4.2° at the current level of 20 mA. Compared with the results ever reported, the divergence angle is reduced.

关键词：垂直腔表面发射激光器相干耦合光子晶体 VCSEL 个人电脑 GaAs 发散角氧化物

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Toxic Effects of Three Heavy Metallic Ions on Rana zhenhaiensis Tadpoles

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Asian Herpetological Research 2015年第2期6卷 132-142页

作者： Li WEI Guohua DING Sainan GUO Meiling TONG wenjun chen Jon FLANDERS Weiwei SHAO Zhihua LIN College of Ecology Lishui University School of Biological Sciences Bristol Life Sciences Building University of Bristol

Heavy metal pollution is widespread in some areas of China and results in contamination of land, water, and air with which all living organisms interact. In this study, we used three heavy metallic ions （Cu^2＋, Pb^2＋ and Zn^2＋） to assess their toxicity effects on mortality, blood biomarker and growth traits （body length and body mass） of Rana zhenhaiensis tadpoles. The results showed that the toxicity levels of the three metallic ions were different when conducted with different experiment designs. For acute toxicity tests, Cu^2＋ was the most toxic with the highest tadpole mortality. The mortalities of tadpoles showed significant differences among the treatments at the same exposure time endpoints （24, 48, 72 and 96h）. Results from repeated measures ANOVA indicated that metallic ion concentration, exposure time and their interactions significantly affected the mortalities of R. zhenhaiensis tadpoles. Also, the toxicity effects of all binary combinations of the three metallic ion treatments showed synergism. The half lethal concentrations （LCs0） decreased with increasing exposure time during the experimental period, and the safe concentration （SC）values of Cu^2＋, Pb^2＋ and Zn^2＋ were different from each other. Combined and compared LC50 values with previous data reported, it is suggestes that the toxicity levels of metal pollution to anuran tadpoles should be species-and age-related. For blood biomarker tests, Zn^2＋ was the most toxic with the highest total frequencies of abnormal erythrocytic nucleus. All three metallic ions caused higher abnormal erythrocytic nucleus compared with control groups. In a chronic toxicity test, Pb^2＋ was the most toxic with lowest growth traits. Survival rate （except for 18 days）, total body length and body mass showed significant differences among the treatments. These findings indicated that tadpoles of R. zhenhaiensis should be as a bioindicator of heavy metals pollution.

关键词： Acute toxicity micronuclcus chronic toxicity growth metal pollution Rana zhenhaiensis

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中小型矸石堆场免覆土生态治理技术研究

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成都大学学报（自然科学版） 2024年第2期43卷 196-204页

作者：李娟陈孝兵余鹏程赵建壮陈文军白彦波陈显坤高杨潘声旺四川省煤田地质工程勘察设计研究院四川成都610072 四川川煤华荣能源有限责任公司四川攀枝花617000 成都大学建筑与土木工程学院四川成都610106

以攀枝花市某煤矿中小型矸石堆场为研究对象,提出了一种集坡面生态防护、集水装置、土壤改良和植被配置为一体的适用于中小型矸石堆场边坡植被的免覆土快速恢复技术.通过坡面治理技术、土壤改良技术和植物修复技术,制定修复方案,以改善... 详细信息

以攀枝花市某煤矿中小型矸石堆场为研究对象,提出了一种集坡面生态防护、集水装置、土壤改良和植被配置为一体的适用于中小型矸石堆场边坡植被的免覆土快速恢复技术.通过坡面治理技术、土壤改良技术和植物修复技术,制定修复方案,以改善边坡的立地条件,降低矸石堆场对生态环境的影响.研究表明,该方法实施150 d后,研究区植被覆盖度达95%以上,植物存活率达到95%以上,水土流失率减少了85%以上,显著提高了矸石堆场边坡植被的恢复效果,降低了矸石堆场对周边生态环境的影响.该研究为中小型煤矸石堆场免覆土生态修复提供了一种有效的技术手段,有望推动矸石堆场的生态重建及矿区环境的良性发展.

关键词：中小型矸石堆免覆土技术生态治理

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Alignment technology of heavy ion medicalmachine

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Radiation Detection Technology and Methods 2019年第2期3卷 37-43页

作者： wenjun chen Yaqing Yang Guozhu Cai Zhiguo Cui Xiaorong Zhu Shaoming Wang Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Huizhou Research Center of Ion Science Huizhou 516000China

Background Heavy ion medical machine(HIMM)is built by the Institute of Modern Physics,Chinese Academy of Sciences,with a high-energy beam transport line with a height of 18 m,and its complex space mounting structure increases the difficulty of installation and *** The aim of this paper is to provide methods to install all accelerator components efficiently and to ensure that the alignment accuracies of all installed components are within the designed *** We accomplished the fiducialization and pre-alignment of complex modules by combining the laser tracker and the alignment *** analyzing various elements that affect the accuracy of alignment,a method of alignment for high-energy beam transport line was proposed based on high-precision three-dimensional control *** All components have been installed and aligned in a short time,alignment position accuracy of magnets is less than 0.1 mm,and the treatment components alignment accuracy is no more than 0.4 *** On the basis of error analysis,all alignment results are better than the required precisions,and all of these guaranteed the successful operation of HIMM.

关键词： Heavy ion accelerator Three-dimensional control network Laser tracker Alignment Fiducialization

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Human radiological safety assessment for petawatt laser-driven ion acceleration experiments in CLAPA-T

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Matter and Radiation at Extremes 2024年第4期9卷 8-15页

作者： Xiaopeng Zhang Jiarui Zhao Shengxuan Xu Xun chen Ying Gao Shiyou chen Kun Zhu Xueqing Yan wenjun Ma State Key Laboratory of Nuclear Physics and Technology and Key Laboratory of HEDP of the Ministry of EducationCAPTPeking UniversityBeijing 100871China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsCASBeijing 100049China Beijing Laser Acceleration Innovation Center HuairouBeijing 101400China Institute of Guangdong Laser Plasma Technology BaiyunGuangzhou 510540China

The newly built Compact Laser Plasma Accelerator-Therapy facility at Peking University will deliver 60 J/1 Hz laser pulses with 30 fs *** by this petawatt laser facility,proton beams with energy up to 200 MeV are expected to be generated for tumor *** high-repetition operation,both prompt radiation and residual radiation may cause safety ***,human radiological safety assessment before commissioning is *** this paper,we simulate both prompt and residual radiation using the Geant4 and FLUKA Monte Carlo codes with reasonable proton and as-produced electron beam *** find that the prompt radiation can be shielded well by the concrete wall of the experimental hall,but the risk from residual radiation is nonnegligible and necessitates adequate radiation *** the basis of the simulation results,we discuss the constraints imposed by radiation safety considerations on the annual working time,and we propose radiation cooling strategies for different shooting modes.

关键词： laser prompt acceleration

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The Deformation Analysis of the 3D Alignment Control Network Based on the Multiple Congruence Models

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Journal of Geodesy and Geoinformation Science 2023年第2期6卷 21-31页

作者： Xudong ZHANG wenjun chen Xiaodong ZHANG Yajun ZHENG Bin ZHANG Shaoming WANG Jiandong YUAN Guozhen SUN Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

In the construction and maintenance of particle accelerators,all the accelerator elements should be installed in the same coordinate system,only in this way could the devices in the actual world be consistent with the design ***,with the occurrence of the movements of the reinforced concrete cover plates at short notice or building deformations in the long term,the control points upon the engineering structure will be displaced,and the fitness between the subnetwork and the global control network may be ***,it is necessary to evaluate the deformations of the 3D alignment control *** from the extant investigations,in this paper,to characterize the deformations of the control network,all of the congruent models between the points measured in different epochs have been identified,and the congruence model with the most control points is considered as the primary or fundamental model,the remaining models are recognized as the additional ***,the discrepancies between the primary S-transformation parameters and the additional S-transformation parameters can reflect the relative movements of the additional congruence *** the iterative GCT method and the iterative combinatorial theory are proposed to detect multiple congruence models in the control *** the actual work of the alignment,it is essential to identify the competitive models in the monitoring network,which can provide us a hint that,even the fitness between the subnetwork and the global control network is good,there are still deformations which may be *** numerical experiments show that the suggested approaches can describe the deformation of the 3D alignment control network roundly.

关键词： similarity transformation 3D alignment control network deformation analysis hypothesis testing iterative global congruence test iterative combinatorial theory

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Some Aspects to Improve the Financial Accounting Report under Cyber-economy Background

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Journal of Modern Accounting and Auditing 2006年第2期2卷 29-34页

作者： wenjun chen Kejie Yue Nanjing Normal University

Cyber-economy is the product of intemet commercialization since mid-1980s. Nowadays, cyber-economy is impacting every aspect of the social life under the background of economic globalization, with modem e-information as its base and the e-commerce as its guideline. Financial circumstance has also changed greatly as being affected by the whole economic condition. Accounting is a very important management activity. We need to study and research on how to face the changing condition and play its function constantly. This paper analyzes and discusses the financial accounting report under the cyber-economy from six aspects in order to promote accounting development.

关键词： cyber-economy financial accounting report improvement

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A comprehensive review of thermally sprayed abradable sealing coatings:Focusing on abradability

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Chinese Journal of Aeronautics 2024年第10期37卷 1-25页

作者： Jingqi HUANG Xueqiang CAO Wenbo chen Xiaojun GUO Min LI wenjun WANG Shujuan DONG Li LIU Meizhu chen State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China AECC Hunan Power Machinery Research Institute Zhuzhou 412002China

Modern aero and stationary gas turbine engines have been designed with much higher compressor-pressure ratios and thrust-weight ratios than earlier models,and these ratios are strongly influenced by the hot-running clearances between the rotating and stationary *** main benefit of reduction in the clearances is efficiency gains,resulting in lowered fuel consumption and polluting gas emissions,with ecological and economic ***,at these undersized clearances,some rubbing interactions are unavoidable,which can be accommodated by applying Abradable Sealing Coatings(ASCs)on the stationary inner *** paper reviews the commercially available abradable materials for thermal spraying at various application positions and *** is placed on the abradability and wear mechanisms *** addition,considering the tendency of SiC/SiC ceramic matrix composites replacing superalloys as hot section components,the future prospect of ceramic abradables based on Environmental Barrier Coatings(EBCs)in turbine stages is summarized and a new concept of"self-degradable ceramics"based on the corrosive steam environment is proposed for the purpose of high-temperature fillerfree abradables.

关键词： Abradable sealing coatings Clearance control systems Thermal spraying Ceramic matrix composites Gas turbine engines

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创新型图文健康教育对骨质疏松性骨折患者自我管理能力的影响

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临床医学研究与实践 2024年第26期9卷 143-146页

作者：杨雪萍覃瑜芳李浩曦陈世梅周红梅陈文君广西医学科学院·广西壮族自治区人民医院脊柱外科广西南宁530021

目的探讨创新型图文健康教育对骨质疏松性骨折患者自我管理能力的影响。方法选取2018年1月至12月我院骨科收治的160例骨质疏松性骨折住院患者为研究对象,将其随机分为对照组和观察组,各80例。对照组采用常规护理,观察组在对照组基础上... 详细信息

目的探讨创新型图文健康教育对骨质疏松性骨折患者自我管理能力的影响。方法选取2018年1月至12月我院骨科收治的160例骨质疏松性骨折住院患者为研究对象,将其随机分为对照组和观察组,各80例。对照组采用常规护理,观察组在对照组基础上采取创新型图文健康教育。比较两组的自我管理能力、生活自理能力、疾病基本知识掌握情况及再次骨折发生情况。结果观察组的健康自我管理行为、健康自我管理认知、健康自我管理环境评分显著高于对照组,差异具有统计学意义(P0.05)。结论创新型图文健康教育能提高骨质疏松性骨折患者的自我管理能力、生活自理能力、疾病相关知识掌握程度,降低再次骨折的发生率,值得临床应用和推广。

关键词：骨质疏松性骨折自我管理能力创新型图文健康教育生活自理能力

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