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The　effect　of　magnetic　field-free　space　on　the　acoustic　behavior　of　budgerigars(Me-lopsittacus　undul

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Acta Seismologica Sinica(English Edition) 1998年第4期11卷 487-493页

作者： Jin-Chang Jiang (1) Hai-Qiang Jin (2) Yun-Fang Lin (2) Hao Chen (1) Xin-Yu Yang (1) Xiao-Ping Zeng (2) Xun Zhou (2) 1. Institute of Biophysics Academia Sinica 100101 Beijing China 2. Institute of Geophysics China Seismological Bureau 100081 Beijing China

Ｔｈｅｅｆｆｅｃｔｏｆｍａｇｎｅｔｉｃｆｉｅｌｄ－ｆｒｅｅｓｐａｃｅｏｎｔｈｅａｃｏｕｓｔｉｃｂｅｈａｖｉｏｒｏｆｂｕｄｇｅｒｉｇａｒｓ（Ｍｅ－ｌｏｐｓｉｔｔａｃｕｓｕｎｄｕｌａｆｕｓ）ＪＩＮ－ＣＨＡＮＧＪＩＡＮＧ１... 详细信息

Ｔｈｅｅｆｆｅｃｔｏｆｍａｇｎｅｔｉｃｆｉｅｌｄ－ｆｒｅｅｓｐａｃｅｏｎｔｈｅａｃｏｕｓｔｉｃｂｅｈａｖｉｏｒｏｆｂｕｄｇｅｒｉｇａｒｓ（Ｍｅ－ｌｏｐｓｉｔｔａｃｕｓｕｎｄｕｌａｆｕｓ）ＪＩＮ－ＣＨＡＮＧＪＩＡＮＧ１）（蒋锦昌），ＨＡＩ－ＱＩＡＮＧＪ...

关键词： effect magnetic The Me-lopsittacus budgerigars space the field-free

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余热锅炉入口管箱底面沉积特性研究

化工学报 2024年

作者：赵浩然黄嗣罗林梅 1.西安交通大学能源与动力工程学院 2.茂名重力石化装备股份公司西安交通大学能源与动力工程学院茂名重力石化装备股份公司

采用计算流体力学软件，基于Euler-Lagrange方法，对一种余热锅炉入口管箱底面沉积特性进行数值模拟，详细研究了不同质量流量(0.002～0.010 kg·s-1)、入口速度(1.5～3.5 m·s-1)以及颗粒直径（20～60μm）对于底面沉积特性的影响规律... 详细信息

采用计算流体力学软件，基于Euler-Lagrange方法，对一种余热锅炉入口管箱底面沉积特性进行数值模拟，详细研究了不同质量流量(0.002～0.010 kg·s-1)、入口速度(1.5～3.5 m·s-1)以及颗粒直径（20～60μm）对于底面沉积特性的影响规律。模拟的气固两相速度与实验数据吻合较好，验证了模型的适用性。模拟结果表明：（1）当颗粒直径不变时，为了改善底面沉积情况，应当尽量减小入口速度和颗粒质量流量。（2）当颗粒质量流量不变时，若颗粒直径小于40μm，较小的入口速度能够较好地改善底面沉积情况；若颗粒直径大于40μm，增大入口速度能够显著改善底面沉积情况；若颗粒直径为40μm，入口速度的变化几乎不能改变底面沉积速率。（3）当入口速度不变时，为了改善底面沉积情况，应当尽量减小颗粒直径和颗粒质量流量。

关键词：气固两相流沉积数值模拟余热锅炉计算流体力学

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爆炸作用下建筑结构高效毁伤评估方法

爆炸与冲击 2024年

作者：吕晋贤吴昊卢永刚陈德 1.同济大学土木工程学院 2.中国工程物理研究院总体工程研究所同济大学土木工程学院中国工程物理研究院总体工程研究所

爆炸作用下建筑结构毁伤等级的高效预测有助于优化战前火力部署，评估战后毁伤效果，同时也可为重要建筑目标防护设计提供指导。然而，受限于建筑结构目标特性多样、体量庞大、内部系统庞杂以及验证困难等特点，尚缺乏高效的毁伤评估方... 详细信息

爆炸作用下建筑结构毁伤等级的高效预测有助于优化战前火力部署，评估战后毁伤效果，同时也可为重要建筑目标防护设计提供指导。然而，受限于建筑结构目标特性多样、体量庞大、内部系统庞杂以及验证困难等特点，尚缺乏高效的毁伤评估方法。借助高精度数值仿真分析，提出了综合考虑爆炸荷载、构件、房间和整体毁伤等级的建筑结构毁伤评估方法。首先，提出了爆炸作用下典型地面建筑，即含填充墙钢筋混凝土（RC）框架结构，损伤破坏和倒塌的高精度数值仿真分析方法，并得到RC结构爆炸试验和倒塌事故，以及砌体墙爆炸试验的充分验证。其次，开展了典型三层原型RC框架结构在不同爆炸当量（25～200kg TNT）作用下的内爆炸数值仿真，定量分析了爆炸冲击波在建筑结构内部的传播、结构损伤破坏和墙体飞散等。进一步给出了爆炸作用下建筑结构的高效毁伤评估流程，即：基于镜像爆源结合非线性叠加原理确定内爆炸荷载；基于等效单自由度方法评估梁、板、柱及墙体构件的毁伤等级；引入构件重要性系数加权确定房间毁伤等级；考虑房间功能及位置重要性评估整体结构的毁伤等级。最后，基于上述爆炸工况，通过对比高精度数值仿真分析与毁伤评估方法的预测结果，表明：两者得到的典型RC框架结构的整体毁伤等级一致，即在25kg、100kg和200kg TNT爆炸下分别呈现轻度、中度和重度毁伤，提出方法可缩短99%以上的计算耗时，兼具可靠性与时效性。

关键词：爆炸荷载建筑结构毁伤评估损伤破坏

A prototype RF power source for CSNS/RCS

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 218-221页

作者： WeiLing Huang (1) Hong Sun (1) HaiQi Zhao (2) Yu Liu (2) YanDong Li (2) ZhiGuang Qiao (2) Xiao Li (1) ChunLin Zhang (1) 1. Accelerator Center Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China2. 23rd Institute of China Aerospace Science and Industry Corporation Beijing 100854 China

A prototype RF power source has been built to supply high RF power to a ferrite-loaded cavity, which is a part of R&D of the Rapid Cycling Synchrotron of China Spallation Neutron Source (CSNS/RCS). A direct fast RF feedback amplifier, a 4:1 impedance transformer and auto tuning grid were locally located to compensate the heavy beam loading of CSNS/RCS. Design and commissioning of the RF power source is discussed here, also with some advice on system improvement.

关键词： RF power source synchrotron beam loading RF feedback amplifier

Construction and Activity Assay of the Activating Transcription Factor 3 Reporter Vector pATF/CRE-luc

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Acta Biochimica et Biophysica Sinica 2006年第1期38卷 58-62页

作者： Jun-Qing XU~(1,2),Jing-Lan DENG~1,You-Sheng WU~2,Han-Yan FU~2,Rui-Hua WANG~2,Jian ZHANG~2, Fan LU~(2*),and Zhong-Liang ZHAO~(2*) ~1 Department of Naclear Medicine,Xijing Hospital,Fourth Military Medical University,Xi'an 710032,China ~2 Department of Biochemistry and Molecular Biology,Fourth Military Medical University,Xi'an 710032,China Department of Biochemistry and Molecular Biology Fourth Military Medical University Xi''an 710032 China

Activating transcription factor 3 (ATF3),a member of the activating transcription factor/cAMPresponsive element binding protein (ATF/CREB) family of transcription factors,is induced by manyphysiological *** investigate the activity of ATF/CREB in cells with physiological stresses,we developeda practical reporter vector,the plasmid pATF/CRE-luc,bearing activating transcription factor/cAMP responsiveelement (ATF/CRE) binding *** plasmid was constructed by inserting three repeats of the ATF/CREbinding element into the plasmid pG51uc,replacing the GAL-4 binding *** plasmids pACT/ATF3 andpATF/CRE-luc were transfected into HeLa and NIH3T3 cells,respectively,and the results showed that theexpression of luciferase .was increased in a dose-dependent manner on plasmid pACT/*** datasuggested that the plasmid pATF/CRE-luc could be used as a sensitive and convenient reporter system ofATF3 activity.

关键词： ATF/CRE luciferase gene pG51uc reporter system

Proton and neutron alignments of the K~π=5/2^- band in ^(79)Kr

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Nuclear Science and Techniques 2000年第1期11卷 27-33页

作者： PAN Qiang-Yan1 De Poll M2 De Angelis G2 , Fahlander C2 Bazzacco D2 Farnea E2 Napoli D R2 Spolaore P2 (1Institute of Modeal Physics, the Chinese Academy of Sciences, Lanzhou 730000 2.aboratori Nazionali de Legnaro, INFN, 35030 Legnaro (PD), Italia 中科院近代物理所甘肃兰州 730000 Laboratori Nazionali de Legnaro INFN 35030

An experimental study of high-spin states in 79Kr has been performed at the GASP array using the reaction 55Mn(30Si, αpn). Nine new states along with 10 new gamma ray transitions were found in the Kπ=5/2- band in 79Kr. Three band crossings, associated with the alignments of a πg9/2 pair and a πg9/2 pair and also a high-j 5h11/2 intrude orbital, were observed at rotational frequency h=0.50, 0.65 and 0.90 MeV, respectively. A cranked shell model analysis has been made to interpret the experimental results.

关键词：氪79 高自旋态原子核质子队列中子队列自旋轨道形态

An improved method for phasing crystal structures with low non-crystallographic symmetry using cryo-electron microscopy data

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Protein & Cell 2015年第12期6卷 919-923页

作者： Jia Wang (1) (2) (3) Weiguang Wang (1) (2) Wen Song (2) (3) (4) Zhifu Han (2) (3) (4) Heqiao Zhang (2) (3) (4) Jijie Chai (2) (3) (4) Hongwei Wang (2) (3) (4) Jiawei Wang (1) (2) 1.State Key Laboratory of Membrane Biology School of Life Sciences Tsinghua University Beijing 100084 China 2.Center for Structural Biology School of Life Sciences Tsinghua University Beijing 100084 China 3.Tsinghua-Peking Center for Life Sciences School of Life Sciences Tsinghua University Beijing 100084 China 4.Ministry of Education Key Laboratory of Protein Science School of Life Sciences Tsinghua University Beijing 100084 China

Cryo-electron microscopy （cryo-EM） and macromolecular crystallography （MX） both allow the creation of three-dimensional images of biological macromolecules. EM data usually provide access to three-dimensional reconstructions of large biological complexes at low resolution, whereas MX usually delivers atomic or quasi-atomic resolution structures （1-3 A）.

关键词： Phase Error Molecular Replacement Histogram Match TLR13 Molecule Solvent Flatten

孝昌县“九小场所” 消防安全防控的实践与思考

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湖北应急管理 2024年第6期 48-50页

作者： 1.孝昌县应急管理局 2.孝昌县消防救援大队孝昌县应急管理局孝昌县消防救援大队

当前,小教学机构、小医疗机构、小商店、小餐饮场所、小旅馆、小娱乐场所、小网吧、小美容洗浴场所、小生产加工企业等“九小场所”,点多、面广,普遍存在硬件设施差、安全投入少、管理水平低等问题,成为安全事故易发多发地。近3年,全国... 详细信息

当前,小教学机构、小医疗机构、小商店、小餐饮场所、小旅馆、小娱乐场所、小网吧、小美容洗浴场所、小生产加工企业等“九小场所”,点多、面广,普遍存在硬件设施差、安全投入少、管理水平低等问题,成为安全事故易发多发地。近3年,全国各地城镇发生的燃气爆炸、火灾事故,九成集中在“九小场所”。近年来,孝感市孝昌县坚持把“九小场所”消防安全作为统筹发展和安全的重点工作,经全面摸排,目前孝昌县“九小场所”有5797家(县城区4023家、乡镇1774家),全县“九小场所”消防安全防控工作坚持“防”字在先、“管”字当头,在从源头消除“九小场所”安全隐患上作了一些探索实践。本文总结了孝昌县关于“九小场所”消防安全防控工作开展的具体实践,并剖析了当前工作中存在的问题,提出了相应的工作建议。

关键词：消防安全安全防控餐饮场所燃气爆炸火灾事故防控工作娱乐场所探索实践

Recent glacial retreat in High Asia in China and its impact on water resource in Northwest China

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Science China Earth Sciences 2004年第12期47卷 1065-1075页

作者： YAO Tandong 1,2 ,WANG Youqing 2 ,LIU Shiying 2,1 ,PU Jianchen 2,1 ,SHEN Yongping 2 & LU Anxin 2,1 1.Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100029,China 2.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China 1. Chinese Academy of Sciences Institute of Tibetan Plateau Research 100029 Beijing China 2. Chinese Academy of Sciences Cold and Arid Regions Environmental and Engineering Research Institute 730000 Lanzhou China

Under the impact of climatic warming, the glaciers in the High Asia in China have been retreating continuously with negative glacial mass balance in recent several decades. The retreat became more intensive in the past 10 years. The spatial pattern of the glacial retreat in the High Asia in China is that the smallest magnitude of retreat is in the inland of the Tibetan Plateau, the magnitude increases from the inland to the margin of the Tibetan Plateau, and the largest magnitude at the margin of the Tibetan Plateau. The glacial retreat in the High Asia in China has an important impact on the water resource of the arid regions in Northwest China. This study shows that the glacial retreat in the 1990s has caused an increase of 5.5% in river runoff in Northwest China. In the Tarim River basin, the increase of river runoff is higher than 5.5%.

关键词： High Asia, glacial fluctuation, impact on water resource.