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Key Scientific Challenges in Geological Disposal of High Level Radioactive Waste

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工程科学（英文版） 2007年第4期5卷 45-50页

作者： Wang Ju(beijing research institute of Uranium Geology,china National Nuclear corporation,beijing 100029,P.R.china)

The geological disposal of high level radioactive waste is a challenging task facing the scientific and technical *** paper introduces the latest progress of high level radioactive disposal programs in the world,and discusses the following key scientific challenges:(1)precise prediction of the evolution of a repository site;(2)characteristics of deep geological environment;(3)behaviour of deep rock mass,groundwater and engineering material under coupled conditions(intermediate to high temperature,geostress,hydraulic,chemical,biological and radiation process,etc);(4)geochemical behaviour of transuranic radionuclides with low concentration and its migration with groundwater;and(5)safety assessment of disposal *** large-scale research projects and several hot topics related with high-level waste disposal are also introduced.

关键词： high level radioactive waste geological disposal underground research laboratory

Non-invasive scanning ion-selective electrode technique and its applications to the research of higher plants

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Progress in Natural Science:Materials International 2007年第6期17卷 625-629页

作者： Sun Tong1, Xu Yue2, Li Peng1, Yu Shangguan2 and Yin Liping1(1. College of Life Science, Capital Normal University, beijing 100037, china 2. Younger USA Science & technology corporation, 7 Dayton Lane, Amherst MA 01002, USA) College of Life Science Capital Normal University Beijing 100037 China Younger USA Science and technology corporation 7 Dayton Lane Amherst MA 01002 United States

The process of various ions and molecules getting into and out of cells is critical for plant survival. The non-invasive scanning ion-selective electrode technique (SIET) is a non-invasive method to obtain the information of ions/molecules across membranes in plant. This technique can measure the absolute concentration of ions and molecules, and also their fluxes and directions of movement. The samples to be analyzed can be a single cell, a piece of tissue, a whole organ and even an intact seedling. This article reviews the recent progress made in plant physiology by using this technique and discusses its potentials in future studies on plant physiology.

关键词： non-invasive electrophysiology technique ion-selective electrode ion transport across membrane SIET.

A Fast Multi-Pattern Matching Algorithm for Mining Big Network Data

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china Communications 2019年第5期16卷 121-136页

作者： Jun Liu Guangkuo Bian Chao Qin Wenhui Lin beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876China technology research institute Aisino CorporationBeijing 100195China

The rapid development of mobile network brings opportunities for researchers to analyze user behaviors based on largescale network traffic data. It is important for Internet Service Providers(ISP) to optimize resource allocation and provide customized services to users. The first step of analyzing user behaviors is to extract information of user actions from HTTP traffic data by multi-pattern URL matching. However, the efficiency is a huge problem when performing this work on massive network traffic data. To solve this problem, we propose a novel and accurate algorithm named Multi-Pattern Parallel Matching(MPPM) that takes advantage of HashMap in data searching for extracting user behaviors from big network data more effectively. Extensive experiments based on real-world traffic data prove the ability of MPPM algorithm to deal with massive HTTP traffic with better performance on accuracy, concurrency and efficiency. We expect the proposed algorithm and it parallelized implementation would be a solid base to build a high-performance analysis engine of user behavior based on massive HTTP traffic data processing.

关键词： HTTP traffic multi-patterns matching Spark URL matching user behavior

Synthesis of AIMCM-41 mesoporous molecular sieves with high stability

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Petroleum Science 2008年第2期5卷 163-166页

作者： Liu Baijun Wang Hui Key Laboratory of Catalysis China National Petroleum Corporation China University of Petroleum Beijing 102249 China State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

Mesoporous molecular sieves AIMCM-41 were synthesized by static hydrothermal crystallization using cetyltrimethylammonium bromide as template, water glass as silica source and pseudoboehmite as aluminum source. The XRD results showed that the prepared AlMCM-41 mesoporous molecular sieves had high relative crystallinity and long-range order. The relative crystallinity was greater than 27% after calcination at 900 ℃ for 2 hours and was still greater than 14% after ageing in steam at 800 ℃ for 2 hours. The results indicated that both thermal and hydrothermal stabilities of the mesoporous molecular sieves AIMCM-41 were good.

关键词： Pseudo-boehmite hydrothermal stability synthesis AIMCM-41 thermal stability hydrothermal

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小角x射线散射结晶聚合物过渡层厚度的测定

物理学报 2004年第4期53卷 1247-1250页

作者：赵辉郭梅芳董宝中中国科学院高能物理研究所同步辐射实验室中国石油化工股份有限公司北京化工研究院北京100013

由于结晶聚合物中的过渡层是弥散的 ,而修正的Porod定律是解决这种问题的有效方法之一 .把相关函数法和Porod定律法求结晶聚合物的过渡层厚度进行了比较。

关键词： X射线散射结晶聚合物过渡层厚度相关函数法 Porod定律晶体测量弥散

Analysis of the ambiguity of log-constrained seismic impedance inversion

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Petroleum Science 2011年第2期8卷 151-156页

作者： Li Guofa Li Hao Ma Yanyan Xiong Jinliang State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum (Beijing) Beijing 102249 China Key Laboratory of Geophysical Prospecting China National Petroleum Corporation Beijing 102249 China Dagang Oil field PetroChina Tianjin 300280 China

Although the ambiguity of seismic inversion is widely recognized in both theory and practice, so far as a concrete inversion example is concerned, there is not any objective, controllable method or any standard for how to evaluate and determine its ambiguity and reliability, especially for the high frequency components beyond the effective seismic frequency band. Taking log-constrained impedance inversion as an example, a new appraisal method is proposed on the basis of analyzing a simple geological model. Firstly, the inverted impedance model is transformed to a reflection coefficient series. Secondly, the maximum effective frequency of the real seismic data is chosen as a cutoff point and the reflection coefficient series is decomposed into two components by low-pass and high-pass filters. Thirdly, the geometrical reflection characteristics of the high-frequency components and that of the real seismic data are compared and analyzed. Then, the reliability of the inverted impedance model is appraised according to the similarity of geometrical characteristics between the high-frequency components and the real seismic data. The new method avoids some subjectivity in appraising the inverted result, and helps to enhance the reliability of reservoir prediction by impedance inversion technology.

关键词： Log-constrained impedance reflection coefficients seismic inversion ambiguity

Effect of active species in crude oil on the interfacial tension behavior of alkali/synthetic surfactants/crude oil systems

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Petroleum Science 2008年第4期5卷 353-358页

作者： Liu Liwei Hou Jirui Yue Xiang＇an Zhao Ji Key Laboratory of Petroleum Engineering Ministry of Education China University of Petroleum Beijing 102249 China china Petrochemical corporation Beijing 100029 China

The effect of active species present in crude oil on the interfacial tension （IFT） behavior of alkali/synthetic surfactants/crude oil systems was studied. The system consisted of heavy alkyl benzene sulfonate, sodium chloride, sodium hydrate and Daqing crude oil. Experimental results indicated that active species would diffuse from oil/aqueous interface to aqueous phase and finally an equilibrium could be reached in the system with increasing contact time. Moreover, the minimum IFT and equilibrium IFT values increased with increasing contact time and a linear relationship existed between dynamic IFT and f^-1/2 when IFT value approaching the minimum and after the minimum IFT was reached. This indicated that the dynamic IFT-time behavior was diffusion controlled. The oil and aqueous phases were analyzed by infrared （IR） spectroscopy. IR spectra of oil and aqueous phases illustrated that the content of active species in the oil phase decreased, but the content of active species in the aqueous phase increased after alkali reacted with crude oil. This indicated that the active species present in oil played an important role in reducing IFT.

关键词： Contact time diffusion alkali interfacial tension

基于GIS与多因素综合评价法的新发展阶段下开发区集约节约用地评价及潜力测算——以潍坊市潍城区为例

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山东国土资源 2024年第4期40卷 66-72页

作者：黄晓娜田启霞刘守刚于恒恩潍坊市自然资源和规划局潍城分局山东潍坊261000 潍坊市自然资源和规划局高新分局山东潍坊261000 中海宏洋潍坊分公司山东潍坊261000

在经济新发展阶段背景下,以山东潍城经济开发区为研究对象,运用GIS和多因素综合评价法,通过构建评价指标体系,综合评价潍城经济开发区土地集约利用水平。结果表明,潍城经济开发区土地集约利用总体水平较高,但土地利用结构方面布局不合理... 详细信息

在经济新发展阶段背景下,以山东潍城经济开发区为研究对象,运用GIS和多因素综合评价法,通过构建评价指标体系,综合评价潍城经济开发区土地集约利用水平。结果表明,潍城经济开发区土地集约利用总体水平较高,但土地利用结构方面布局不合理,特别是工业用地率问题突出。根据定量化结果和实际情况,潍城经济开发区应通过科学规划土地利用,优化产业布局;拓展产业发展空间,引导产业转型升级;提高产业用地市场化配置水平等措施实现土地利用的“精明增长”。

关键词：多因素综合评价法新发展阶段土地集约利用潍坊市潍城区

维普期刊数据库博看期刊

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基于闭环形式的车辆减振器热学特性研究

中国公路学报 2012年第4期25卷 153-158页

作者：么鸣涛龙凯贺李平中国航天科工集团公司第四研究院北京100854 北京理工大学机械与车辆学院北京100081 华北电力大学新能源电力系统国家重点实验室北京102206 中国航天科工集团公司北京无线电测量研究所北京100854

为了解决某车辆被动悬架系统中减振器由于温升过高而漏油失效的问题,提出了车辆悬架系统机械特性与其热学特性相互耦合的模型。采用MATLAB/Simulink建立闭环正反馈系统的热-机耦合模型,并通过仿真计算得到某车辆在多种工况以及不同悬架... 详细信息

为了解决某车辆被动悬架系统中减振器由于温升过高而漏油失效的问题,提出了车辆悬架系统机械特性与其热学特性相互耦合的模型。采用MATLAB/Simulink建立闭环正反馈系统的热-机耦合模型,并通过仿真计算得到某车辆在多种工况以及不同悬架参数条件下减振器的温升特性曲线。研究结果表明:随着路面等级的下降、车速的提高、簧上质量的增大以及悬架刚度的减小,减振器的温度升高;车轮刚度对减振器温升特性影响较小;簧下质量对减振器温升特性无影响。

关键词：汽车工程减振器仿真闭环温升