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Science China Chemistry 2008年第10期51卷 928-936页

作者： PANG XueHui GUO WenJuan LI WeiHua xie jiandong HOU BaoRong School of Chemistry and Chemical Engineering University of JinanJinan 250022China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China Institute of Design and Research of Shandong Jianzhu University Jinan 250013China

The inhibiting effect and mechanism of 1-cyclopropyl-6-fluoro-1,4-dihydro -4-oxo-7-(1-piperazinyl) -3- quinoline carboxylicacid(ciprofloxacin), 1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinoline carboxylic acid (norfloxacin) and (?)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7- oxo-7 H-pyrido(1,2,3-de)-1,4- benzoxazine-6 carboxylic acid (ofloxacin) on the corrosion of mild steel in 1 mol/L HCl have been studied using electrochemical method, quantum chemical method and SEM at 303 K. The potentiodynamic results showed that these compounds suppressed both cathodic and an-odic processes of mild steel corrosion in 1 mol/L HCl. The impedance spectroscopy showed that Rp values increased, and Cdl values decreased with the rising of the working concentration. Quantum chemical calculation showed that there was a positive correlation between some inhibitors structure properties and the inhibitory efficiency. The inhibitors function through adsorption followed Langmuir isotherm, and chemisorption made more contribution to the adsorption of the inhibitors on the steel surface compared with physical adsorption. SEM analysis suggested that the metal had been protected from aggressive corrosion because of the addition of the inhibitors.

关键词： inhibition mild steel polarization electrochemical impedance spectroscopy SEM

A Throughput-Aware Joint Vehicle Route and Access Network Selection Approach Based on SMDP

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China Communications 2020年第5期17卷 243-265页

作者： jiandong xie Sa Xiao Ying-Chang Liang Li Wang Jun Fang National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of ChinaChengdu 116024China Center for Intelligent Networking and Communications(CINC) University of Electronic Science and Technology of China(UESTC)Chengdu 611731China Research and Development Center Huawei TechnologiesStockholm 16494Sweden

In intelligent transportation system(ITS), the interworking of vehicular networks(VN) and cellular networks(CN) is proposed to provide high-data-rate services to vehicles. As the network access quality for CN and VN is location related, mobile data offloading(MDO), which dynamically selects access networks for vehicles, should be considered with vehicle route planning to further improve the wireless data throughput of individual vehicles and to enhance the performance of the entire ITS. In this paper, we investigate joint MDO and route selection for an individual vehicle in a metropolitan scenario. We aim to improve the throughput of the target vehicle while guaranteeing its transportation efficiency requirements in terms of traveling time and distance. To achieve this objective, we first formulate the joint route and access network selection problem as a semi-Markov decision process(SMDP). Then we propose an optimal algorithm to calculate its optimal policy. To further reduce the computation complexity, we derive a suboptimal algorithm which reduces the action space. Simulation results demonstrate that the proposed optimal algorithm significantly outperforms the existing work in total throughput and the late arrival ***, the heuristic algorithm is able to substantially reduce the computation time with only slight performance degradation.

关键词： mobile data offloading network selection route selection semi-Markov decision process vehicular network

Semi-crosslinked polyacrylamides as high-resolution and dynamic self-coating sieving matrices for protein capillary electrophoresis

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Chinese Science Bulletin 2008年第19期53卷 2953-2957页

作者： ZHOU Jin XU jiandong xie Yao QU Feng DENG YuLin GENG LiNa School of Life Science and Technology Beijing Institute of Technology Beijing 100081 China

This paper describes non-gel capillary sieving electrophoresis employing semi-crosslinked polyacrylamide as a high performance and low viscous replaceable separation matrix for separation of non-denatured protein separation. Arising from the fine sieving and dynamic coating ability of this polymer, a mixture of basic proteins lysozyme, cytochrome C, ribonuclease A, and trypsin was resolved with excellent reproducibility. Mixing different semi-crosslinked polyacrylamides together further improves the separation. The separtion mechanism was analyzed. With network structure developed to an intermediate state between crosslinked gel and linear polymer solutions, these semi-crosslinked polyacrylamide polymers demonstrate a promise as a new class of size sieving separation medium, not only in capillary electrophoresis, but also in microfluidic chip separation schemes.

关键词：毛细管筛子电泳聚丙烯酰胺蛋白质分离

试论现代民族国家观念在云南边地的传播——以清末民初少数民族学校教育为中心的考察

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国际新闻界 2017年第9期39卷 102-115页

作者：谢建东中国人民大学新闻学院

现代民族国家观念在云南边地传播肇源于清末西方列强入侵所引发的西南边疆危机,迫使清政府转变原有的国防观念,更加重视云南边防,在民族主义和现代民族国家观念的作用下,清政府的现代国家边界意识越发清晰。在建立现代民族国家使命的推... 详细信息

现代民族国家观念在云南边地传播肇源于清末西方列强入侵所引发的西南边疆危机,迫使清政府转变原有的国防观念,更加重视云南边防,在民族主义和现代民族国家观念的作用下,清政府的现代国家边界意识越发清晰。在建立现代民族国家使命的推动下,从清末到民国初年,政府借助于新的印刷技术、现代民族国家观念的思想武器和学校教育的组织形式,试图同化边地少数民族、巩固边防。现代民族国家观念在边地酝酿、中心生成又反传边地,其在云南边地传播的过程,其实也是教育同化的过程。历史地看,这样的努力是成功的,但边地少数民族传统的"世界观"并未因此而完全消隐,依然具有生命力。

关键词：现代民族国家云南边地少数民族学校教育观念传播

论邓小平、江泽民、胡锦涛、习近平互联网思想的主要观点及理论贡献

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国际新闻界 2018年第12期40卷 50-66页

作者：郑保卫谢建东中国人民大学新闻学院中国人民大学新闻与社会发展研究中心广西大学马克思主义新闻观研究中心云南省委办公厅

在我国互联网从无到有,由弱至强,实现快速发展的过程中,党的几代领导人在不同时期,根据所处时代党和国家工作重心及互联网发展的实际需要,适时提出了一系列关于互联网的观点和论断,推动了我国互联网的进步,形成并丰富发展了中国共产党... 详细信息

在我国互联网从无到有,由弱至强,实现快速发展的过程中,党的几代领导人在不同时期,根据所处时代党和国家工作重心及互联网发展的实际需要,适时提出了一系列关于互联网的观点和论断,推动了我国互联网的进步,形成并丰富发展了中国共产党的互联网思想。论文指出邓小平是开启我国互联网之门的关键领导人;江泽民创立了我国互联网发展与管理的基本思想;胡锦涛阐述了新世纪我国互联网发展的新特点新规律;习近平开创了我国建设世界网络强国的新纪元。

关键词：邓小平江泽民胡锦涛习近平互联网思想

吡哌酸、左氧氟沙星及环丙沙星在0．5mol／L H2SO4中对碳钢的缓蚀性能与机理研究

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化学学报 2011年第4期69卷 483-491页

作者：庞雪辉张玉璇张洁解建东侯保荣济南大学化学化工学院济南250022 北京林业大学环境科学与工程学院北京100083 山东建筑大学济南250013 中国科学院海洋研究所青岛266071

利用失重实验、动电位极化曲线测试、交流阻抗测试(EIS)及扫描电子显微镜(SEM)方法对吡哌酸(8-乙基-5-氧代-5,8-二氢-2-(1-哌嗪基)吡啶并[2,3-d]嘧啶-6-羧酸)、左氧氟沙星[(±)-9-氟-2,3-二氢-3-甲基-10-(4-甲基-1-哌嗪基)-7-氧代-7H-... 详细信息

利用失重实验、动电位极化曲线测试、交流阻抗测试(EIS)及扫描电子显微镜(SEM)方法对吡哌酸(8-乙基-5-氧代-5,8-二氢-2-(1-哌嗪基)吡啶并[2,3-d]嘧啶-6-羧酸)、左氧氟沙星[(±)-9-氟-2,3-二氢-3-甲基-10-(4-甲基-1-哌嗪基)-7-氧代-7H-吡啶并[1,2,3-de][1,4]苯并恶嗪-6-羧酸]及环丙沙星[l-环丙基-6-氟-1,4-二氢-4-氧代-7-(1-哌嗪基)-3-喹啉羧酸]在303 K时0.5 mol/L H2SO4中对碳钢的缓蚀性能、作用机理进行研究.失重实验得出,303 K时试样浸泡在0.5 mol/L H2SO4溶液中的腐蚀速度随缓蚀剂的浓度增大而减小,同时三种缓蚀剂的缓蚀效率显著增大.电化学测试表明缓蚀剂分子对阴阳极反应均有抑制作用,但对阴极的抑制作用更加明显,其抑制作用与缓蚀剂在金属表面的覆盖有关.303 K时缓蚀剂在金属表面的吸附行为符合Langmuir等温线,且作用过程物理、化学吸附兼有.扫描电子显微镜观察结果表明,添加三种缓蚀剂对碳钢表面的腐蚀起到了显著的保护作用.同种条件下的测试结果表明,环丙沙星缓蚀性能最强.

关键词：缓蚀失重动电位极化交流阻抗扫描电子显微镜吸附

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高速公路改扩建路基路面拼宽施工技术

科学技术创新 2023年第7期 139-142页

作者：解建东中交一公局海威工程建设有限公司北京

本文对高速公路改扩建工程建设的必要性进行分析,并从地基处理技术、土工格栅技术及新旧公路拼宽技术、两侧加宽技术等方面阐述高速公路改扩建工程中路基路面拼宽施工技术要点,以期在提高基路面拼宽施工质量的同时,也能从根本上保障高... 详细信息

本文对高速公路改扩建工程建设的必要性进行分析,并从地基处理技术、土工格栅技术及新旧公路拼宽技术、两侧加宽技术等方面阐述高速公路改扩建工程中路基路面拼宽施工技术要点,以期在提高基路面拼宽施工质量的同时,也能从根本上保障高速公路改扩建工程建设水平,实现工程建设效益最大化目标。

关键词：高速公路改扩建路基拼宽路面拼宽施工技术

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国防教育在大学生综合素质教育中的作用

中国科技信息 2010年第11期 279-280页

作者：谢剑冬韩山师范学院武装部

高校国防教育是全民国防教育的重要阵地和爱国主义教育的重要载体,是增强大学生国防意识、振奋民族精神、提高学生个人综合素质的重要手段,是培养国防后备人才的根本途径。

关键词：大学生国防教育综合素质

BOTTLENECK IDENTIFICATION AND SIMULATION STUDY OF THE PRODUCTION LOGISTICS

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BOTTLENECK IDENTIFICATION AND SIMULATION STUDY OF THE PRODUC...

双调制深度大线性动态范围自适应PDH稳频方法

第五届物流技术与装备国际学术会议

作者： Lan Xiuju xie jiandong Chen Yong Shen Miaomiao Lu Jiansha Institute of Industrial Engineering Zhejiang University of Technology Hangzhou China

＜正＞Production logistics is an important part of production management. Manufacturing enterprises in our country attach much importance to the research and development of new products, the manufacture technology, the process, assembly technology, the improvement of equipment, and so on. Contrarily, they pay little attention on the control technology of production logistics, such as:the layout of machines, the design and arrangement of the product line, and the plan of the materiel flows, etc. Logistics balance suggested by TOC is different from capacity balance suggested by conventional wisdom, it points out that a very few bottleneck resources controls the whole system’s logistics in the enterprise, and also determines the using efficiency of the non-bottleneck resources which are in the majority of the whole system. Based on analyzing the dynamic characteristic of the bottleneck, this paper puts forward a bottleneck identification model of production logistics which is based on the distributing of equipments’ load in different time period and the control method, according to TOC. Finally, an example is provided to simulate the model. This method can identify the bottleneck resources in enterprises effectively, and can help enterprises to reach the goal of optimizing the production process of the whole system by controlling bottleneck resources in the production logistics.

关键词： Production logistics TOC Bottleneck Identification

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光学学报 2023年第19期43卷 115-126页

作者：严利平张哲伟谢建东楼盈天陈本永浙江理工大学精密测量技术实验室浙江杭州310018

针对Pound-Drever-Hall(PDH)技术存在的线性动态范围窄、抗干扰能力弱的问题,提出一种基于双调制深度+双误差信号的PDH稳频方法。首先采用数字正交解调技术精确提取干涉信号相位以实现本振信号相位和干涉信号相位的自动匹配;然后利用透... 详细信息

针对Pound-Drever-Hall(PDH)技术存在的线性动态范围窄、抗干扰能力弱的问题,提出一种基于双调制深度+双误差信号的PDH稳频方法。首先采用数字正交解调技术精确提取干涉信号相位以实现本振信号相位和干涉信号相位的自动匹配;然后利用透射功率信号Ptran和传统误差信号SPDH构建一个新误差信号Spre,以扩大PDH稳频系统的线性动态范围;接着,采用大调制深度对应的新误差信号Spre实现快速捕获和预锁定;最后,采用小调制深度对应的误差信号SPDH实现精确锁定。锁定后,可根据Ptran幅值变化自动切换调制深度和误差信号,实现大线性动态范围和高灵敏度的PDH稳频。研制了基于现场可编辑逻辑门阵列(FPGA)的稳频控制系统,对法布里-珀罗腔进行了锁定测试。实验结果表明,双调制深度+双误差信号的自适应锁定机制可极大地提高锁定系统的抗干扰能力,且锁定精度高,3小时腔长相对稳定度达5.72×10-9,所提方法可以广泛应用于激光频率/谐振腔锁定等领域。

关键词： Pound-Drever-Hall稳频线性动态范围法布里-珀罗腔相位匹配数字正交解调