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Different responses of arbuscular mycorrhizal fungal community to day-time and night-time warming in a semiarid steppe

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Chinese Science Bulletin 2014年第35期59卷 5080-5089页

作者： yongchan Kim cheng Gao yong Zheng wei Yang Liang chen Xinhua he Shiqiang Wan Liang-Dong Guo State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of Sciences university of Chinese Academy of Sciences school of Plant Biology University of Western Australia school of Life Science Henan University

Arbuscular mycorrhizal(AM) fungi form mutualistic symbioses with most plant species and play important roles in *** of the response of AM fungi to temperature change will improve our understanding of the function of AM fungal community under global climate change scenarios in *** effects of constant warming on AM fungal communities have been investigated previously,but responses to asymmetrical warming over 2..h periods have never been documented in natural *** this study,we examined AM fungal communities in a full factorial design including day-time and night-time warming in a semiarid steppe in northern ***-time and 2..h warming,but not night-time warming,significantly increased AM fungal spore *** contrast,none of the three warming regimes had a significant effect on AM fungal extra radical hyphal *** of 161 operational taxonomic units(OTus) of AM fungi were recovered by 454 pyrosequencing of 18 S r ***-time,night-time,and 2..h warming all significantly increased AM fungal OTu *** AM fungal OTus showed a significant bias toward day-time,night-time or2..h *** AM fungal community composition was significantly affected by night-time warming,but not by day-time and 2..h *** finding highlighted different responses of AM fungal spore density and community composition to asymmetrical *** study might improve our understanding of ecosystem functioning of AM fungal community under global climate change scenarios in a semiarid steppe ecosystem.

关键词：半干旱草原真菌群落丛枝菌根变暖反应自然生态系统全球气候变化 AM真菌

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Femtosecond Time-Resolved Resonance-Enhanced CARS of Gaseous Iodine at Room Temperature

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Chinese Physics Letters 2011年第4期28卷 216-219页

作者： he Ping FAN Rong-wei XIA Yuan-Qin Yu Xin YAO yong {2..De-Ying National Key Laboratory of Science and Technology on Tunable Laser Institute of Opto-electronicsHarbin Insitute of TechnologyHarbin 150080 College of Basic Sciences Harbin University of CommerceHarbin 150028 Department of Electronic and Information Engineering Shenzhen Graduate SchoolHarbin Institute of TechnologyShenzhen 518055

Time-resolved resonance-enhanced coherent anti-Stokes Raman scattering(CARS)is applied to investigate molecular dynamics in gaseous iodine.40fs laser pulses are applied to create and monitor the high vibrational states of iodine at room temperature(corresponding to a vapor pressure as low as about 35 Pa)by femtosecond timeresolved *** on the time delay between the probe pulse and the pump/Stokes pulse pairs,the high vibrational states both on the electronically ground states and the excited states can be detected as oscillations in the CARS transient *** is proved that the femtosecond time-resolved CARS technique is a promising candidate for investigating the molecular dynamics of a low concentration system and can be applied to environmental and atmospheric monitoring measurements.

关键词： pump Femto scattering

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Discovery of tip induced unconventional superconductivity on Weyl semimetal

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Science Bulletin 2017年第6期62卷 425-430页

作者： he Wang Huichao Wang Yuqin chen Jiawei Luo Zhujun Yuan Jun Liu {2..Wang Shuang Jia Xiong-Jun Liu jian wei Jian Wang International Center for Quantum Materials School of Physics Peking University Beijing 100871 China Collaborative Innovation Center of Quantum Matter Beijing China Center of Electron Microscopy State Key Laboratory of Silicon Materials School of Materials Sdence and Engineering Zhejiang University Hangzhou 310027 China

Weyl fermion is a massless Dirac fermion with definite chirality,which has been long pursued since *** it has not been observed as a fundamental particle in nature,Weyl fermion can be realized as low-energy excitation around Weyl point in Weyl semimetal,which possesses Weyl fermion cones in the bulk and nontrivial Fermi arc states on the surface. As a firstly discovered Weyl semimetal,Ta As crystal possesses 12..airs of Weyl points in the momentum space,which are topologically protected against small perturbations. here,we report for the first time the tip induced superconductivity on Ta As crystal by point contact spectroscopy. The zero bias conductance peak as well as a conductance plateau with double conductance peaks and sharp double dips are observed in the point contact spectra simultaneously,indicating unconventional superconductivity. Our further theoretical study suggests that the induced superconductivity may have nontrivial topology. The present work opens a new route in investigating the novel superconducting states based on Weyl materials.

关键词： Tip induced unconventional superconductivity Topological superconductivity Weyl semimetal TaAs Point contact spectroscopy

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Particle-in-cell mode beam dynamics simulation of the low energy beam transport for the SSC-linac injector

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Chinese Physics C 2011年第5期35卷 500-504页

作者： XIAO chen he Yuan YuAN You-Jin YAO Qing-Gao WANG Zhi-Jun CHANG wei LIu {2..XIA Jia-Wen Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China Graduate university of Chinese Academy of Sciences Beijing 100049 China The school of Nuclear Science and Technology Lanzhou university Lanzhou 730000 China

A new SSC-linac system （injector into separated sector cyclotron） is being designed in the HIRFL （heavy ion research facility of Lanzhou）. As part of SSC-Linac, the LEBT （low energy beam transport） consists of seven solenoids, four quadrupoles, a bending magnet and an extra multi-harmonic buncher. The total length of this segment is about 7 meters. The beam dynamics in this LEBT has been studied using three-dimensional PIC （particle-in-cell） code BEAMPATH. The simulation results show that the continuous beam from the ion source is first well analyzed by a charge-to-mass selection system, and the beam of the selected charge-to-mass ratio is then efficiently pre-bunched by a multi-harmonic buncher and optimally matched into the RFQ （radio frequency quadrupole） for further acceleration. The principles and effects of the solenoid collimation channel are discussed, and it could limit the beam emittance by changing the aperture size.

关键词： SSC-linac LEBT PIC mode optimal injection collimation

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Hot Deformation Behavior of Vanadium-microalloyed Medium-carbon Steel for Fracture Splitting Connecting Rod

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Journal of Iron and Steel Research International 2015年第7期22卷 615-621页

作者： wei-jun HuI Si-lian chen cheng-wei SHAO yong-jian ZHANG Han DONG school of Mechanical Electronic and Control EngineeringBeijing Jiaotong University Central Iron and Steel Research Institute

Single compression tests were carried out with a Gleeble-3800 thermal simulator to investigate hot deform- ation behavior of two vanadium-microalloyed medium-carbon steels for fracture splitting connecting rod. The tests were performed to a total true strain of 0.92..t true strain rates ranging from 10-2..o 10 s-1 and deformation temper- ature of 900--1 150 ℃, The results show that hot deformation behavior of the tested steels is similar to that of con- ventional medium-carbon microalloyed steels and dynamic recrystallization is easier to occur at higher deformation temperature and lower strain rate. The austenite deformation resistance and activation energy of deformation increase with increasing vanadium content from 0.15% to 0. 2.. and thus the starting time of dynamic recrystallization was delayed. Finer recrystallized austenite grain could he obtained at higher strain rate, lower deformation temperature and higher vanadium content. TEM observation of the specimens quenched just before and after deformation reveals that vanadium is mainly in dissolved solute condition in austenite and thus affects the dynamic recrystallization behavior of the tested steels mainly through solute-drag effect.

关键词： vanadium microalloyed medium-carbon steel hot deformation dynamic recrystallization fracture splitting connected rod

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RT-nPCR Assays for Amplification and Sequencing of VP1 Genes in Human Enterovirus A–D from Clinical Specimens

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Biomedical and Environmental Sciences 2020年第11期33卷 829-838页

作者： chen wei WENG Yu wei he Wen Xiang ZHu Ying Yu Ting Ting XIE Jian Feng ZheNG Kui cheng YAN Yan Sheng ZHANG yong Jun ZHANG Wen Chang The school of Public health Fujian Medical UniversityFuzhou 350122FujianChina Fujian Center for Disease Control and Prevention Fujian Provincial Key Laboratory of Zoonosis ResearchFuzhou 350001FujianChina

Objective To develop RT-nPCR assays for amplifying partial and complete VP1 genes of human enteroviruses(heVs)from clinical samples and to contribute to etiological surveillance of heV-related *** A panel of RT-nPCR assays,consisting of published combined primer pairs for VP1 genes of heV A–C and in-house designed primers for heV-D,was established in this *** sensitivity of each RT-nPCR assay was evaluated with serially diluted virus stocks of five serotypes expressed as CCID50 perμL and copies perμL,and the newly established methods were tested in clinical specimens collected in recent *** The sensitivity of RT-nPCR assays for amplifying partial VP1 gene of heVs was 0.1 CCID50 perμL and 10 virus copies perμL,and for the complete VP1 gene was 1 CCID50 perμL and 100 virus copies perμL,using serially-diluted virus stocks of five *** a proof-of-concept,2..serotypes were identified and complete VP1 sequences of 2..serotypes were obtained by this system among 858 clinical specimens positive for heVs during the past eight surveillance *** This RT-nPCR system is capable of amplifying the partial and complete VP1 gene of heV A–D,providing rapid,sensitive,and reliable options for molecular typing and molecular epidemiology of heVs in clinical specimens.

关键词： Clinical specimens Human enterovirus A–D VP1 gene Polymerase chain reaction

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铌酸锂调控固态电解质电场结构促进锂离子高效传输

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Science china Materials 2024年第6期67卷 1947-1955页

作者：刘晓潼温博华钟贵明程醒简翠英郭勇黄妍斐马家宾史沛然陈立坤张丹丰吴士超柳明吕伟贺艳兵康飞宇 Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center Institute of Materials Research(IMR)Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China school of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Laboratory of Advanced Spectro-electrochemistry and Li-ion Batteries Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China Department of Mechanical Engineering York UniversityTorontoON M3J 1P3Canada Nanoyang Group State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055China

聚合物基固态电解质得益于其易加工性,最有希望应用于下一代固态锂金属电池.目前,聚合物基态电解质的离子电导率提升策略多为加入导锂陶瓷以构建离子传输通道,其提升程度有限.电场在锂离子输运过程中存在重要影响,目前研究中有关电场对... 详细信息

聚合物基固态电解质得益于其易加工性,最有希望应用于下一代固态锂金属电池.目前,聚合物基态电解质的离子电导率提升策略多为加入导锂陶瓷以构建离子传输通道,其提升程度有限.电场在锂离子输运过程中存在重要影响,目前研究中有关电场对锂离子传输的影响机制尚不明确.本文将兼具高离子电导率和高介电常数的铌酸锂嵌入聚偏氟乙烯基体中,设计了一种新型复合固态电解质.铌酸锂颗粒有效调节电解质内部电场结构,增强了离子输运方向电场强度,实现了离子电导率的大幅提升(7.39×10^(-4)S cm^(-1),2..).该电解质匹配高镍正极和锂金属负极的固态电池可稳定循环1000次以上,容量保持率为72..该研究为设计下一代固态锂电池用高离子电导复合固态电解质提供了新的策略.

关键词： lithium niobate solid-state electrolytes dielectric ceramics electric field regulation

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颅内压监测辅助开颅血肿清除术治疗颅脑损伤患者效果及其预后影响因素分析

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现代生物医学进展 2024年第3期24卷 532-536页

作者：陈正钢沈李奎尚海龙何智勇汤卫兵上海交通大学医学院苏州九龙医院急诊科江苏苏州215028 上海交通大学医学院苏州九龙医院神经外科江苏苏州215028 上海交通大学医学院苏州九龙医院医学影像科江苏苏州215028

目的:分析颅内压监测辅助开颅血肿清除术治疗颅脑损伤患者效果及其预后影响因素。方法:选择我院自2..9年1月至2..3年3月接诊的135例拟接受开颅血肿清除术治疗的颅脑损伤患者作为研究对象,根据监测方式不同,分为常规组和监测组;其中常规... 详细信息

目的:分析颅内压监测辅助开颅血肿清除术治疗颅脑损伤患者效果及其预后影响因素。方法:选择我院自2..9年1月至2..3年3月接诊的135例拟接受开颅血肿清除术治疗的颅脑损伤患者作为研究对象,根据监测方式不同,分为常规组和监测组;其中常规组予以标准开颅血肿清除术治疗,监测组予以颅内压监测下控制性减压结合开颅血肿清除术治疗。比较两组手术前后的颅内压、格拉斯哥昏迷(GCS)评分、手术并发症发生情况,根据术后90 d的格拉斯哥预后评分(GOS)评分,计算两组的预后良好率,使用单因素分析和多因素Logistic回归分析预后的影响因素。结果:监测组术后即刻及术后12..颅内压均小于常规组(P2..h、48 h的GCS评分均高于常规组(P<0.05);监测组术中低血压、急性脑膨出、颅内血肿、脑血管痉挛和非计划性再次手术的发生率均低于常规组(P<0.05);经单因素分析和多因素Logistic回归分析,年龄、入院GCS评分、脑疝、改良CT图像评分均是颅脑损伤患者预后的独立影响因素(P<0.05)。结论:颅内压监测辅助开颅血肿清除术治疗颅脑损伤患者的效果显著,可以有效降低颅内压、减少并发症发生和改善预后,但预后受年龄、入院GCS评分、脑疝、改良CT图像评分的影响。

关键词：颅脑损伤颅内压监测开颅血肿清除术预后影响因素

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One-year status of hepatic venous pressure gradient measurement from 85 hospitals in china

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Portal Hypertension & Cirrhosis 2024年第2期3卷 116-123页

作者： Jitao Wang Ting Cui Linpeng Zhang Zhiping Yan Lei Li Jinjun chen Junhui Sun Hua Xiang he Zhu Hao Wu Jiancuo Gengzang Feng Zhang wei Wu Guohong Cao Wuhua Guo Haibin Shi Hui Xue Guangjun Huang Qiang Yu Meng Niu Huiling Xiang Derun Kong wei Gou Xuefeng Luo Fuliang he Min Yuan wei Liu yong Wang Hongjie Hu Xiaoli Zhu Tao Yu Qinxue Sun wei Qu Ting Lu Deqiang Ma Li Zhang Jun Ma Jun Yang Ketao Mu Xiaoliang Zhu Kai Xiong Huiguo Ding Shengjuan Yao Mingsheng Huang Fang Wang Zexin Wang yong Huang Jianan Li Hongfeng Yi Birun Huang Zhongwei Zhao Duiping Feng Yanming Lei Changlong Hou Wenbo Guo Shirong Liu Gaojun Teng Kangshun Zhu Fan Wu Xiaogang Hu Wenfeng Zhang Shaoqi Yang Zhouchao Hu Pengfei Pang Shaowu Zhuang weidong Wang Qingliang Zhu Kunpeng Zhang chengyu Liu Dongliang Li Chao Ma Hong Jiang Xingong Zhao weixin Ren Zhiwei Wang Lei Yu Fuhuang Lin Chaoguang Yan Feng Wang Lei Yu Hui Huan Wenyong Shen Shaofei he chengda Zhang Jinlun Bao Jiangtao Liu Jun Wu Jianbo Zhao Jian Zhang Xiaolong Qi hebei Provincial Key Laboratory of Cirrhosis&Portal Hypertension Xingtai People's HospitalXingtaiHebeiChina Center of Portal Hypertension Department of RadiologyZhongda HospitalSchool of MedicineSoutheast UniversityNanjingJiangsuChina Department of Interventional Therapy Beijing Shijitan Hospital Affiliated to Capital Medical UniversityBeijingChina Department of Intervention Taiyuan Third People's HospitalTaiyuanShanxiChina Department of Intervention Zhongshan Hospital Affiliated to Fudan UniversityShanghaiChina Department of Interventional Medicine The First Hospital of Lanzhou UniversityLanzhouGansuChina Department of Infectious Diseases Nanfang Hospital of Southern Medical UniversityGuangzhouGuangdongChina hepatobiliary and Pancreatic Intervention Center The First Affiliated Hospital of Zhejiang University School of MedicineHangzhouZhejiangChina Interventional Vascular Surgery Hunan Provincial People's HospitalChangshaHunanChina Department of Intervention Sixth People's Hospital of ShenyangShenyangLiaoningChina Department of Gastroenterology West China Hospital of Sichuan UniversityChengduSichuanChina Department of Intervention The Fourth People's Hospital of Qinghai ProvinceXiningQinghaiChina Department of Gastroenterology Nanjing Drum Tower HospitalNanjingJiangsuChina Department of Gastroenterology The First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiangChina Department of Radiology Shulan(Hangzhou)HospitalHangzhouZhejiangChina Department of Intervention Mengchao Hepatobiliary Hospital of Fujian Medical UniversityFuzhouFujianChina Department of Interventional Radiology The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Department of Gastroenterology The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina Department of Interventional Radiology Fifth Medical Center

Aims:Surveys and research on the applications of the hepatic venous pressure gradient(HVPG)are important for understanding the current status and future development of this technology in *** article aimed to investigate the status of hepatic venous pressure gradient measurement in china in ***:We investigated the overall status of HVPG technology in china-including hospital distribution,hospital level,annual number of cases,catheters used,average cost,indications,and current challenges by using online *** counting the number and percentages of cases of these results,we hope to clarify the current status of HVPG measurements in ***:According to the survey,85 hospitals in china used HVPG technology in 2..2..istributed across 2..provinces.A total of 4989 HVPG measurements were performed in all of the surveyed hospitals in 2..2..f which 2..3 cases(56.4%)were measured *** average cost of HVPG measurement was 5646.8±2..7.9 *** the clinical teams who performed the measurements(sometimes multiple per hospital),94.3%(82..7)used the balloon method,and the majority of the teams(72..%,63/87)used embolectomy ***:This survey clarified the clinical application status of HVPG in china and confirmed that some medical institutions in china have established a foundation for this *** is still necessary to continue promoting and popularizing this technology in the future.

关键词： application status hepatic vein pressure gradient questionnaire survey

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Artificial intelligence can assist with diagnosing retinal vein occlusion

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International Journal of Ophthalmology(English edition) 2021年第12期14卷 1895-1902页

作者： Qiong chen wei-Hong Yu Song Lin Bo-Shi Liu {2..Wang Qi-Jie wei Xi-Xi he FeiDing Gang Yang You-Xin chen Xiao-Rong Li Bo-Jie Hu Tianjin Key Laboratory of Retinal Functions and Diseases Tianjin Branch of National Clinical Research Center for Ocular DiseaseEye Institute and School of OptometryTianjin Medical University Eye HospitalTianjin 300384China Key Lab of Ocular Fundus Diseases Chinese Academy of Medical SciencesDepartment of OphthalmologyPeking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100032China Vistel AI Lab Visionary Intelligence LtdBeijing 100081China school of Information Renmin University of ChinaBeijing 100081China

AIM:To assist with retinal vein occlusion(RVO)screening,artificial intelligence(AI)methods based on deep learning(DL)have been developed to alleviate the pressure experienced by ophthalmologists and discover and treat RVO as early as ***:A total of 8600 color fundus photographs(CFPs)were included for training,validation,and testing of disease recognition models and lesion segmentation *** disease recognition and four lesion segmentation models were established and ***,one disease recognition model and one lesion segmentation model were selected as ***,2.. CFPs from 130 patients were included as an external test set to determine the abilities of the two selected ***:using the Inception-v3 model for disease identification,the mean sensitivity,specificity,and F1 for the three disease types and normal CFPs were 0.93,0.99,and 0.95,respectively,and the mean area under the curve(AuC)was *** the DeepLab-v3 model for lesion segmentation,the mean sensitivity,specificity,and F1 for four lesion types(abnormally dilated and tortuous blood vessels,cotton-wool spots,flame-shaped hemorrhages,and hard exudates)were 0.74,0.97,and 0.83,***:DL models show good performance when recognizing RVO and identifying lesions using *** of the increasing number of RVO patients and increasing demand for trained ophthalmologists,DL models will be helpful for diagnosing RVO early in life and reducing vision impairment.

关键词： artificial intelligence disease recognition lesion segmentation retinal vein occlusion

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