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湖南工程学院学报（社会科学版） 2016年第4期26卷 51-55页

作者：刘旭雯广西师范大学马克思主义学院广西桂林541006

抗战时期,"隐蔽精干,长期埋伏,积蓄力量,以待时机"是中国共产党在国统区的工作方针。桂林党组织从桂林的实际情况出发,通过建立平行支部,单线联系;利用国民党与新桂系的矛盾为自身服务;疏散埋伏以坚持长期斗争等方式,践行了... 详细信息

抗战时期,"隐蔽精干,长期埋伏,积蓄力量,以待时机"是中国共产党在国统区的工作方针。桂林党组织从桂林的实际情况出发,通过建立平行支部,单线联系;利用国民党与新桂系的矛盾为自身服务;疏散埋伏以坚持长期斗争等方式,践行了这一工作方针,巩固和发展抗日民族统一战线;保存和壮大了党的组织;宣传教育群众,扩大党的影响。

关键词：隐蔽精干抗战时期桂林南方局

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Thallium contamination in farmlands and common vegetables in a pyrite mining city and potential health risks

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ENVIRONMENTAL POLLUTION 2019年 248卷 906-915页

作者： liu, Juan Li, Nuo Zhang, Weilong Wei, Xudong Tsang, Daniel C. W. Sun, Yubing Luo, xuwen Bao, Zhi'an Zheng, Wentao Wang, Jin Xu, Guoliang Hou, Liping Chen, Yongheng Feng, Yuexing Guangzhou Univ Key Lab Water Qual & Conservat Pearl River Delta Guangdong Prov Key Lab Radionuclides Pollut Contr Inst Environm Res Greater BaySch Environm Sci & Guangzhou 510006 Guangdong Peoples R China Guangzhou Univ Rural Nonpoint Source Pollut Comprehens Managemen Guangzhou 510006 Guangdong Peoples R China Hong Kong Polytech Univ Dept Civil & Environm Engn Hung Hom Kowloon Hong Kong Peoples R China North China Elect Power Univ Coll Environm Sci & Engn MOE Key Lab Resources & Environm Syst Optimizat Beijing 102206 Peoples R China Northwest Univ Dept Geol State Key Lab Continental Dynam Xian 710069 Peoples R China Guangzhou Univ Sch Life Sci Guangzhou 510655 Guangdong Peoples R China Univ Queensland Sch Earth & Environm Sci Brisbane Qld 4072 Australia

Thallium (Tl) is a trace metal of severe toxicity. Its health concerns via consumption of contaminated vegetables have often been overlooked or underestimated. This study was designed to gain insight into the actual level and distribution characteristics of Tl and metal (loid)s (Pb, Cd, Cr, Sb, Mn, Cu, Zn, Ni, and Co) in agricultural soils and common vegetables cultivated in different zones (upstream, midstream, and downstream) of a densely populated residential area in a typical mine city, which has been open-pit exploiting Tl-bearing pyrite minerals since 1960s. The results show that most of the agricultural soils exhibit contaminated levels of Tl, with Tl contents (upstream: 1.35-4.31 mg/kg, midstream: 2.43 -5.19 mg/kg, and downstream: 0.65-233 mg/kg) mostly exceeding the maximum permissible level (MPL) for agricultural land use (1 mg/kg). Sequential extraction procedure indicates that even Tl is predominantly retained in the residual fraction, significant levels of Tl are still present in the geochemically mobile fractions. Besides, metals like Cu, Cd, Mn, and Co are mostly distributed in the labile fractions. Almost all metal (loid)s in edible parts of the vegetables exceed their corresponding MPL for consumption. The chronic daily intake (CDI) and hazard quotient (HQ) values calculated for inhabitants at different ages indicate non-negligible Tl risks via consumption of local vegetables, especially for children. Therefore, it is critical to establish effective measures for hazardous waste management and enforceable regulations in Tl-polluted area to mitigate potential severe impacts of Tl on human health through food chain. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Thallium Agricultural soil Vegetable Metal/metalloid contamination Pyrite mining

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Macrophage-Disguised Manganese Dioxide Nanoparticles for Neuroprotection by Reducing Oxidative Stress and Modulating Inflammatory Microenvironment in Acute Ischemic Stroke

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ADVANCED SCIENCE 2021年第20期8卷 e2101526页

作者： Li, Chao Zhao, Zhenhao Luo, Yifan Ning, Tingting liu, Peixin Chen, Qinjun Chu, Yongchao Guo, Qin Zhang, Yiwen Zhou, Wenxi Chen, Hongyi Zhou, Zheng Wang, Yu Su, Boyu You, Haoyu Zhang, Tongyu Li, xuwen Song, Haolin Li, Chufeng Sun, Tao Jiang, Chen Fudan Univ Sch Pharm Dept PharmaceutState Key Lab Med Neurobiol Key Lab Smart Drug DeliveryMinist EducInst Brai Shanghai 201203 Peoples R China Fudan Univ Sch Pharm Inst Brain Sci MOE Frontiers Ctr Brain SciDept Pharmaceut Shanghai 201203 Peoples R China

Reperfusion injury is still a major challenge that impedes neuronal survival in ischemic stroke. However, the current clinical treatments are remained on single pathological process, which are due to lack of comprehensive neuroprotective effects. Herein, a macrophage-disguised honeycomb manganese dioxide (MnO2) nanosphere loaded with fingolimod (FTY) is developed to salvage the ischemic penumbra. In particular, the biomimetic nanoparticles can accumulate actively in the damaged brain via macrophage-membrane protein-mediated recognition with cell adhesion molecules that are overexpressed on the damaged vascular endothelium. MnO2 nanosphere can consume excess hydrogen peroxide (H2O2) and convert it into desiderated oxygen (O-2), and can be decomposed in acidic lysosome for cargo release, so as to reduce oxidative stress and promote the transition of M1 microglia to M2 type, eventually reversing the proinflammatory microenvironment and reinforcing the survival of damaged neuron. This biomimetic nanomedicine raises new strategy for multitargeted combined treatment of ischemic stroke.

关键词： biomimetic nanoparticles inflammatory microenvironment microglia polarization neuroprotection O-2 generation reperfusion injury reactive oxygen species (ROS) consumption

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Measurement of the cross sections for ²³⁸U(n, γ)²³⁹U reaction in the energy range of 14.1-14.8 MeV using neutron activation method

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RADIATION PHYSICS AND CHEMISTRY 2018年 152卷 125-128页

作者： Wang, Qiang liu, Tong Qiu, Yijia Lan, Changlin Chen, Bingjun Zhang, Qian Zhan, xuwen Fang, Kaihong Lanzhou Univ Sch Nucl Sci & Technol Lanzhou 730000 Gansu Peoples R China

The neutron capture reaction cross sections of U-238 were measured at the neutron energies of 14.1, 14.5 and 14.8 MeV using the activation method and off-line gamma-ray spectrometric technique. The induced gamma-ray activities were measured using a low background gamma ray spectrometer equipped with a high resolution HPGe detector. The excitation functions of the U-238(n, gamma)U-239 reaction were also calculated theoretically using the TALYS-1.8 program and are in general agreement with experimental data. The experimentally determined cross sections were compared with the data in the literature, and the evaluated data of ENDF/B-VIII.0, JENDL-4.0, and CENDL-3.1, as well as calculated results from TALYS-1.8.

关键词： Neutron activation method Cross section Off-line gamma-ray spectrometry U-238(n, gamma)(239)

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改进四帧差分运动目标检测算法的FPGA实现

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通信技术 2024年第11期57卷 1213-1220页

作者：严飞孟川郑绪文李楚刘银萍南京信息工程大学自动化学院江苏南京210044 江苏省大气环境与装备技术协同创新中心江苏南京210044 南京信息工程大学应急管理学院江苏南京210044

针对传统的帧间差分运动目标检测算法易出现虚假边缘及边缘缺失等现象,设计了一种改进的四帧差分运动目标检测系统,将图像边缘信息与四帧差分算法相融合对运动目标进行检测,并在现场可编程门阵列(Field Programmable Gate Array,FPGA)... 详细信息

针对传统的帧间差分运动目标检测算法易出现虚假边缘及边缘缺失等现象,设计了一种改进的四帧差分运动目标检测系统,将图像边缘信息与四帧差分算法相融合对运动目标进行检测,并在现场可编程门阵列(Field Programmable Gate Array,FPGA)平台上构建了视频图像处理系统。该系统主要由图像采集模块、图像缓存模块、图像处理模块和图像显示模块4个部分组成。通过OV5640摄像头采集1 024×768分辨率的图像数据,将采集的图像数据存入DDR3中,并采用改进的四帧差分算法对运动目标进行检测与标记,最终传输至高清多媒体接口(High-Definition Multimedia Interface,HDMI)外接显示器实时输出结果。实验结果表明,该系统可以准确检测出摄像头采集的视频源中的多个运动目标,并满足实时检测要求。

关键词：改进四帧差分 FPGA 边缘检测 DDR3 多运动目标检测

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玉米果种皮对其种子萌发及生理特性的影响

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种子 2021年第9期40卷 40-47页

作者：刘京朱凯丽岳海旺李贺勤张海艳赵延明杨然兵尚书旗江绪文青岛农业大学玉米研究所山东青岛266109 河北省农林科学院旱作农业研究所河北衡水053000

以郑单958、先玉335、蠡玉16和迪卡007等4个玉米品种种子为材料,通过对果种皮特性、发芽能力、幼苗生长、种子化学成分、酶活性等进行测定,研究果种皮对种子萌发及生理特性的影响。结果表明,果种皮最大吸水量、覆胚果种皮(TCE)穿刺力和... 详细信息

以郑单958、先玉335、蠡玉16和迪卡007等4个玉米品种种子为材料,通过对果种皮特性、发芽能力、幼苗生长、种子化学成分、酶活性等进行测定,研究果种皮对种子萌发及生理特性的影响。结果表明,果种皮最大吸水量、覆胚果种皮(TCE)穿刺力和TCE厚度等3项指标在4个品种间均存在差异,其中郑单958的3项指标均最大,分别为1.02g·(50粒)^(-1)、1.81 N和53.33μm;移除TCE后,4个品种种子的发芽指数、芽(苗)长、主根长、芽(苗)鲜重、芽(苗)干重、根鲜重和根干重等7项指标与对照相比均明显上升。此外,25℃条件下萌发60 h, 4个品种种子胚根鞘破裂率均明显提高,且胚中部、胚根和胚根鞘组织内过氧化氢酶、过氧化物酶、超氧化物歧化酶的活性基本呈上升趋势;不同种子质量指标相关性分析表明,TCE穿刺力和TCE厚度之间呈极显著正相关,该2项指标与发芽势、平均发芽天数、种子总淀粉含量3项指标均呈正相关,但与芽(苗)长、主根长、芽(苗)鲜重、芽(苗)干重、根鲜重、根干重和种子粗脂肪含量等7项指标均呈负相关。研究表明,玉米果种皮特别是TCE相关生物力特性会影响种子萌发及生理特性,这可为进一步研究玉米种子萌发调控及高活力形成机理提供理论基础。

关键词：玉米种子萌发种子活力果种皮生物力

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High Q and high gradient performance of the first medium-temperature baking 1.3 GHz cryomodule

arXiv

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arXiv 2023年

作者： Zhai, Jiyuan Pan, Weimin He, Feisi Ge, Rui Mi, Zhenghui Sha, Peng Jin, Song Han, Ruixiong Wang, Qunyao Lin, Haiying Wang, Guangwei Li, Mei Sang, Minjing Sun, Liangrui Ye, Rui Zhao, Tongxian Li, Shaopeng Zhu, Keyu liu, Baiqi Wang, Xiaolong Yang, Xiangchen Bian, Xiaojuan Zhang, Xiangzhen Ma, Huizhou Dai, xuwen Zhang, Zhanjun Zhang, Liang Zhao, Hui Guo, Runbin Mu, Zhihui Yang, Conglai Zheng, Xiaobing Dong, Chao Huang, Tongming Ma, Qiang Zheng, Hongjuan liu, Ming Wang, Zihan Zhou, Wenzhong Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Key Laboratory of Particle Acceleration Physics & Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Center for Superconducting RF and Cryogenics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China

World’s first 1.3 GHz cryomodule containing eight 9-cell superconducting radio-frequency (RF) cavities treated by medium-temperature furnace baking (mid-T bake) was developed, assembled and tested at IHEP for the Dalian Advanced Light Source (DALS) and CEPC R&D. The 9-cell cavities in the cryomodule achieved an unprecedented highest average Q0 of 3.8 × 1010 at 16 MV/m and 3.6 × 1010 at 21 MV/m in the horizontal test. The cryomodule can operate stably up to a total CW RF voltage greater than 191 MV, with an average cavity CW accelerating gradient of more than 23 MV/m. The results significantly exceed the specifications of CEPC, DALS and the other high repetition rate free electron laser facilities (LCLS-II, LCLS-II-HE, SHINE, S3FEL). There is evidence that the mid-T bake cavity may not require fast cool-down or long processing time in the cryomodule. This paper reviews the cryomodule performance and discusses some important issues in cryomodule assembly and testing. © 2023, CC BY.

关键词： Free electron lasers

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Hardness, elastic modulus, and wear resistance of hafnium oxide-based films grown by atomic layer deposition

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JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A 2016年第5期34卷 051510-051510页

作者： Berdova, Maria liu, xuwen Wiemer, Claudia Lamperti, Alessio Tallarida, Grazia Cianci, Elena Fanciulli, Marco Franssila, Sami Aalto Univ Dept Mat Sci & Engn Espoo 02150 Finland IMM CNR Lab MDM Via C Olivetti 2 I-20864 Agrate Brianza MB Italy Univ Milano Bicocca Dipartimento Sci Mat I-20126 Milan Italy

The investigation of mechanical properties of atomic layer deposition HfO2 films is important for implementing these layers in microdevices. The mechanical properties of films change as a function of composition and structure, which accordingly vary with deposition temperature and post-annealing. This work describes elastic modulus, hardness, and wear resistance of as-grown and annealed HfO2. From nanoindentation measurements, the elastic modulus and hardness remained relatively stable in the range of 163-165 GPa and 8.3-9.7 GPa as a function of deposition temperature. The annealing of HfO2 caused significant increase in hardness up to 14.4 GPa due to film crystallization and densification. The structural change also caused increase in the elastic modulus up to 197 GPa. Wear resistance did not change as a function of deposition temperature, but improved upon annealing. (C) 2016 American Vacuum Society.

关键词： Hardness Elastic moduli Thin film structure Atomic layer deposition Nanotechnology

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建筑业技术研究热点和发展趋势分析

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土木工程与管理学报 2021年第4期38卷 58-62页

作者：吴文伶刘星罗兰黄乾晋玉洁石敬斌肖绪文中国建筑股份有限公司技术中心北京101300

本文基于CNKI数据库对建筑领域文献进行计量分析,结果表明,文献发表数量反应了建筑技术发展历程,与建筑业发展历程基本吻合,这说明建筑技术从研发到应用转化顺畅高效,建筑技术研发与建筑业发展协同促进效果良好。本文运用科学知识图谱... 详细信息

本文基于CNKI数据库对建筑领域文献进行计量分析,结果表明,文献发表数量反应了建筑技术发展历程,与建筑业发展历程基本吻合,这说明建筑技术从研发到应用转化顺畅高效,建筑技术研发与建筑业发展协同促进效果良好。本文运用科学知识图谱可视化分析和问卷调研,探讨了建筑业研究热点和未来发展趋势,结果表明绿色建造和基于BIM的智慧建造是当今研究热点,建筑绿色化和智慧化是发展趋势。对建筑绿色化和BIM技术进行可视化分析,结果显示:绿色建材、绿色施工、绿色建造对建筑绿色化和产出绿色建筑至关重要;BIM技术不仅对建筑设计有深远影响,对包括施工、项目管理和运行维护在内的建筑全生命周期都有重要意义。

关键词：建筑技术文献计量可视化分析绿色建造智慧建造

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Determination of common ginsenosides in Kang'ai injection by aqueous two-phase extraction with deep eutectic solvents and HPLC-UV/DAD

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MICROCHEMICAL JOURNAL 2018年 137卷 302-308页

作者： Li, Peng Zhao, Pengyun liu, Weijie Jiang, Yifu Wang, Wenjiao Bao, Longyue Jin, Yongri Li, xuwen Jilin Univ Coll Chem Changchun 130012 Jilin Peoples R China

In this work, four kinds of deep eutectic solvents (DESs), composed of choline chloride (ChCl) and several alcohols, were synthesized and characterized by H-1 NMR and FT-IR spectra. Based on DES ( ChCl and 1,4-butanediol) and inorganic salt solution (dipotassium phosphate, K2HPO4), aqueous two-phase system (ATPS) coupled with high-performance liquid chromatography has been developed and applied. This method was used for the efficient extraction and determination of eight common ginsenosides (including ginsenoside Rg(1), Re, Rf, Rg(2), Rc, Rb-2 and Rd) in the traditional Chinese medicine injection named Kang'ai injection. To achieve optimum extraction performance, the experimental conditions were optimized, including type and amount of DES and salt, ultrasound time, temperature and pH value. In the dynamic linearity range, experimental results showed satisfactory recoveries of analytes ranging from 92.7-110.8% with the relative standard deviations (RSDs) ranging from 1.2-3.9%. It has been proved that DES-ATPS has great potential for determination of active ingredients in traditional Chinese medicine injection as well as samples in other analytical science field. (C) 2017 Elsevier B.V. All rights reserved.

关键词： Aqueous two-phase system Ginsenosides High-performance liquid chromatography Kang'ai injection

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