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自然水体生物膜有机组分对Pb^(2+)的吸附特性及其影响因素

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高等学校化学学报 2005年第11期26卷 2043-2045页

作者：康春莉郭晶郭平赵宇侠董德明吉林大学环境与资源学院环境科学系长春130023

The biosorption of Pb^2+ by the organic components(exopolymer,nonliving body bacterium and living bacterium) on the dominant bacterium obtained from the surface coatings in natural waters and the effects of biosorption time,temperature and initial pH were *** results showed that Pb^2+ biosorption process by the organic components above was divided into fast phase and slow phase,biosorption equilibrium time was 360,120 and 150 min respectively;the biosorption ability of exopolymer is much higher than nonliving body bacterium and living body bacterium,the maximum biosorption amount of Pb^2+ was all reached at pH=6,the effect of temperature on the biosorption ability of nonliving body bacterium and living body bacterium was negligible;both the Longmuir and Freundlish could describe the course of the biosorption of on Pb^2+ by the organic *** biosorption ability of exopolymer is much higher than nonliving body bacterium and living body bacterium;the thermodynamics experiments also carried on when the Cd^2+ was present,the biosorption of Pb^2+ by the three organic components was also followed the Langmuir and Freundlich(equation),but the biosorption amount and the saturated biosorption amount of Pb^2+ was decreased.

关键词：胞外聚合物非活体细胞活体细胞生物吸附

FMAA-MS Investigation into Ni_(68)Fe_(32) Nanoalloy with Sample Length Less than 30mm

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Chinese Physics Letters 2011年第8期28卷 221-224页

作者： LI Ping-Yun CAO Zhen-Hua JIANG Zhong-Hao MENG xiang-kang National Laboratory of Solid State Microstructures Department of Materials Science and EngineeringNanjing UniversityNanjing 210093 School of Materials Science and Engineering Key Laboratory of Automobile MaterialsJilin UniversityChangchun 130025

An investigation into the properties of nanocrystalline(NC)materials with sample lengths less than 30 mm seems to be a challenge by using conventional mechanical spectroscopy(MS).We use a newly developed frequency modulation acoustic attenuation mechanical spectroscopy(FMAA-MS)to investigate phase transition in Ni68Fe32 NC alloy(22 nm)where the length of the sample is 10 *** internal friction peak accompanied by an abrupt increase in resonant frequency occurs at 641 K,which originates from order-disorder phase transition,confirmed by a vibrating sample magnetometer and differential scanning calorimetry.

关键词： alloy friction magnetometer

Neural correlates of short-term perceptual learning in orientation discrimination indexed by event-related potentials

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Chinese Science Bulletin 2007年第3期52卷 352-357页

作者： SONG Yan PENG DanLing LI xiaoLan ZHANG Yi kang Jing QU Zhe DING YuLong State Key Laboratory of Cognitive Neuroscience and Leaming Beijing Normal University Beijing 100875 China Department of Psychology Sun Yat-Sen University Guangzhou 510275 China

The current work investigated the neural correlates of visual perceptual learning in grating orientation discrimination by recording event-related potentials (ERPs) from human adults. Subjects were trained with a discrimination task of grating orientation in three consecutive training sessions within 2 h. While reaction times (RTs) were shortened gradually across training sessions, the N1 was decreased and the P2 was increased over the parietal and occipital areas. A broadly distributed P3 was increased along with more practices. In addition, the time course of learning reflected in the P2 and P3 amplitudes was in line with the changes of reaction times and exhibited a stable level during later training. The impli- cations of these results to the neural mechanisms subserving perceptual learning were discussed.

关键词：知觉学习视觉短期学习方向辨别神经机制事件相关电位成年人

机内净化降低船用二冲程柴油机NO_x排放仿真

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内燃机学报 2017年第5期35卷 393-398页

作者：贾亢孙凯王天友鲁祯桂勇韩连任天津大学内燃机燃烧学国家重点实验室天津300072 中船动力研究院有限公司上海201206

针对一台满足TierⅡ排放标准的船用二冲程柴油机,建立GT-Power一维仿真模型,研究了废气再循环(EGR)、米勒循环、进气加湿(HAM)以及优化喷油正时等手段对NO_x排放和燃油消耗率的影响,并探讨了通过多种措施耦合来实现TierⅢ排放标准的技... 详细信息

针对一台满足TierⅡ排放标准的船用二冲程柴油机,建立GT-Power一维仿真模型,研究了废气再循环(EGR)、米勒循环、进气加湿(HAM)以及优化喷油正时等手段对NO_x排放和燃油消耗率的影响,并探讨了通过多种措施耦合来实现TierⅢ排放标准的技术路线.结果表明:单独采用米勒循环或进气加湿难以达到TierⅢ排放标准;通过结合米勒循环和进气加湿,可以将NO_x排放降低至TierⅢ标准,但会导致燃油消耗率大幅增加;废气再循环是降低NO_x排放的最有效措施,通过将其与米勒循环和进气加湿相结合,可有效减小EGR使用率,并适度改善燃油经济性的恶化程度.

关键词：船用二冲程柴油机 NOx排放废气再循环数值仿真

Revenue Optimization of Pipelines Construction and Operation Management Based on Quantum Genetic Algorithm and Simulated Annealing Algorithm

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Journal of Applied Mathematics and Physics 2018年第6期6卷 1215-1229页

作者： kang Tan Department of Civil engineering Dalian University of Technology Dalian China

For the optimization of pipelines, most researchers are mainly concerned with designing the most reasonable section to meet the requirements of strength and stiffness, and at the same time reduce the cost as much as possible. It is undeniable that they do achieve this goal by using the lowest cost in design phase to achieve maximum benefits. However, for pipelines, the cost and incomes of operation management are far greater than those in design phase. Therefore, the novelty of this paper is to propose an optimization model that considers the costs and incomes of the construction and operation phases, and combines them into one model. By comparing three optimization algorithms (genetic algorithm, quantum genetic algorithm and simulated annealing algorithm), the same optimization problem is solved. Then the most suitable algorithm is selected and the optimal solution is obtained, which provides reference for construction and operation management during the whole life cycle of pipelines.

关键词： Quantum Genetic Algorithm Simulated Annealing Algorithm Pipelines Construction Management Operation Optimization

Subsumption Checking between Concept Queries in Different Ontologies Based on Mutual Instances

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 68-72页

作者： kang Da-zhou LU Jian-jiang XU Bao-wen WANG Peng ZHOU Jin Department of Computer Science and Engineering NmtheastUniversity Nanjing 210096 Jiangsu China Jiangsu Institute of Software Quality Nanjing 210096 JiangsuChina Institute of Science The People＇s Liberation Army University of Science and Technology Nanjing 210007 Jiangsu China State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 Hubei China

This paper proposes a checking method based on mutual instances and discusses three key problems in the method： how to deal with mistakes in the mutual instances and how to deal with too many or too few mutual instances. It provides the checking based on the weighted mutual instances considering fault tolerance, gives a way to partition the large-scale mutual instances, and proposes a process greatly reducing the manual annotation work to get more mutual instances. Intension annotation that improves the checking method is also discussed. The method is practical and effective to check subsumption relations between concept queries in different ontologies based on mutual instances.

关键词： ontology concept query subsumption checking mutual instance

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环渤海港口群发展的时空演化及影响因素分析

大连海事大学学报 2021年第3期47卷 39-48页

作者：于少强宋夏薇陈康大连海事大学航运经济与管理学院辽宁大连116026

为探究环渤海港口群发展的时空差异及影响因素,基于熵值-突变级数法,从内控、外生和潜力三个方面构建港口发展综合评价指标体系,借助ArcGIS软件,考察2000—2018年间环渤海港口群发展的时序特征和空间差异,并结合障碍因子诊断模型,剖析... 详细信息

为探究环渤海港口群发展的时空差异及影响因素,基于熵值-突变级数法,从内控、外生和潜力三个方面构建港口发展综合评价指标体系,借助ArcGIS软件,考察2000—2018年间环渤海港口群发展的时序特征和空间差异,并结合障碍因子诊断模型,剖析制约港口发展的主要影响因素.研究表明:环渤海港口群发展具有阶段性特征,各港口发展差异显著,但整体发展潜力较大;不同发展阶段制约港口群及群内港口发展的因素有所差异,但主要集中在集装箱吞吐量、外贸进出口总额以及外贸吞吐量等,近年来城市发展情况及资金支撑影响逐步加强.研究结果有助于明确环渤海港口群发展过程及影响因素,为实现港口群高质量协同发展提供参考.

关键词：环渤海港口群时空演化影响因素熵值法突变级数法

Does the discrepancy in histologic differentiation between a forceps biopsy and an endoscopic specimen necessitate additional surgery in early gastric cancer?

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World Journal of Gastrointestinal Oncology 2017年第8期9卷 319-326页

作者： Jae Seung Soh Hyun Lim Ho Suk kang Jong Hyeok Kim Kab Choong Kim Department of Internal Medicine University of Hallym College of Medicine Hallym University Sacred Heart Hospital Department of Surgery University of Hallym College of Medicine Hallym University Sacred Heart Hospital

To investigate the clinicopathological variables in early gastric cancer (EGC) patients in relation to differentiation discrepancy. METHODSThe data of 265 specimens from 240 patients with EGC, who had undergone radical operation at Hallym University Sacred Heart Hospital from 2010 to 2015, were retrospectively analyzed. We evaluated clinical, endoscopic, and histopathological data according to histological discrepancy. RESULTSClinically significant discrepancy rate showed the difference in differentiated type (well and moderately differentiated) and undifferentiated type (poorly differentiated and signet ring cell) between endoscopic biopsies and postoperative specimens was 9.4% (25/265). There were no differences in tumor location, size, gross pattern, and number of biopsies. Specimens having histological discrepancy showed more submucosal invasion (72.0% vs 49.6%, P = 0.033) and lymph node involvement (24.0% vs 7.9%, P = 0.009) than specimens having non-discrepancy. The rate of a positive epidermal growth factor receptor status was higher in specimens having discrepancy than in specimens having non-discrepancy (81.0% vs 55.4%, P = 0.035). CONCLUSIONThe discordance of histologic differentiation is associated with higher submucosal invasion and lymph node metastases in EGC. Patients have histological discrepancy may require additional surgical treatments.

关键词： Early gastric cancer Histological discrepancy Differentiation Clinicopathological factor Endoscopic treatment Surgical treatment

A three-dimensional biomimetic microfluidic chip to study the behavior of hepatic stellate cell under the tumor microenvironment

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Chinese Chemical Letters 2023年第3期34卷 222-225页

作者： Jingjing Kuang Wei Sun Min Zhang Lu kang Shenglong Yang Hongyang Zhang Yuerong Wang Ping Hu Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Engineering Research Centre of Pharmaceutical Process Chemistry Ministry of EducationSchool of PharmacyEast China University of Science and TechnologyShanghai 200237China

In this paper, we designed a three-dimensional cell co-cultured microfluidic chip, which generated interstitial flow and oxygen gradient to simulate the complex tumor microenvironment. It consisted of five parallel cell culture channels and one hypoxic channel. These channels were constructed for the culture of mouse liver tumor cells(Hepa1-6), mouse liver stellate cells(JS-1), the simulation of extracellular matrix, complex biochemical factors(hypoxia and interstitial flow), and the supply of cellular nutrients. The 3D-interstitial flow-hypoxia model was used to study the behavior of JS-1 cells under the effect of tumor microenvironment(TME). The results showed that by co-cultured with Hepa1-6 cells, hypoxia of Hepa1-6 cells, and adding TGF-β1 by interstitial flow, the migration of JS-1 cells could be promoted. Similarly,activated JS-1 cells could led to the epithelial-mesenchymal transformation in co-cultured Hepa1-6 cells,which secreted more TGF-β 1.

关键词： Interstitial flow Hypoxia Microfluidic Tumor microenvironment Behavior