An Introduction to China University of Geosciences(Beijing)

China University of Geosciences（Beijing）（CUGB）,is one of the leading universities listed in"Project 211,"a national program that offers more government financial support for the advancement of 100 top national universities in 21st-century China.CUGB is also supported by the Ministry of Education for its uniquely strong strengths in geological disciplines.CUGB could be traced back to the former Beijing College of Geology,which was founded in 1952 by combining the Departments of Geology from Peking University, Tsinghua University,Tianjin University and Tangshan Railway College.In 1987,the predecessor of CUGB was renamed China University of Geosciences（Beijing）.

China University of Geosciences in Beijing

FOUNDED in 1952, China University of Geosciences in Beijing （CUGB） is a national key university under the direct auspices of the Ministry of Education. Over the past 60 years, it has developed from a geological college tbcused on a single discipline to a multi- disciplinary comprehensive university, offering courses in geology, natural resources, environment and geological engineering.

Learn Chinese and Foreign Knowledge,Cherish Ambition for the World——Exclusive Interview with Professor Zhang Jian,Dean of the School of English and International Studies from Beijing Foreign Studies University

As one of the top foreign language schools in China,Beijing Foreign Studies University s(BFSU)School of English and International Studies has a longstanding history and is famous both at home and abroad.Since its establishment in 1944,the school has cultivated a batch of renowned diplomatists,leaders in the media industry,corporate elites,experts of English education and government officials for the country.The school’s graduates are located all over the world and have become outstanding people in all walks of life.

University of Petroleum,China

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TSINGHUA UNIVERSITY,Beijing,China

AF： Any Field The School of Economics and Management at Tsinghua University （Tsinghua SEM） invites applications for faculty positions at all levels （Assistant Professor, Associate Professor and Full Professor） in any fields of business administration and management. Tsinghua SEM is the only school in China's Mainland accredited by both AACSB and EQUIS. The School offers undergraduate, Master＇s （including MBA and EMBA） and Ph.D. programs. It provides excellent academic environment, state-of-the-art teaching facilities and diversified campus life. The School offers competitive salary, relocation fund, start-up research fund and other fringe benefits. Applicants should hold （or expect to hold） a Ph.D. degree in related fields. More information about the school can be found at http：//www.sem.tsinghua.edu.cn.

TSINGHUA UNIVERSITY,Beijing,China

The School of Economics and Management at Tsinghua University （Tsinghua SEM） invites applications for faculty positions at all levels （Assistant Professor, Associate Professor and Full Professor） in any fields of business administration and management.

TSINGHUA UNIVERSITY, Beijing, China

AF:Any Field The School of Economics and Management at Tsinghua University(Tsinghua SEM)invites applications for faculty positions at all levels(Assistant Professor,Associate Professor and Full Professor)in any fields of business administration and management.Tsinghua SEM is the only school in China’s mainland accredited by both AACSB and EQUIS.The School offers undergraduate,

TSINGHUA UNIVERSITY,Beijing,China

The School of Economics and Management at Tsinghua University （Tsinghua SEM） invites applications for faculty positions at all levels （Assistant Professor, Associate Professor and Full Professor） in any fields of business administration and management. Tsinghua SEM is the only school in China's Mainland accredited by both AACSB and EQUIS. The School offers undergraduate, Master＇s （including MBA and EMBA） and Ph.D. programs. It provides excellent academic environment, state-of-the-art teaching facilities and diversified campus life. The School offers competitive salary, relocation fund, start-up research fund and other fringe benefits. Applicants should hold （or expect to hold） a Ph.D. degree in related fields. More information about the school can be found at http：//www.sem.tsinghua.edu.cn.

TSINGHUA UNIVERSITY, Beijing, China

AF:Any Field The School of Economics and Management(SEM)invites applications for positions at all levels (Lecturer(equivalent to Assistant Professor),Associate Professor and Full Professor)in any field of accounting,economics,finance,information systems,and operations management.The school offers undergraduate,Master’s(including MBA)and Ph.D.programs.It provides an excellent academic environment,which is significantly enhanced recently by the arrival of Special-Term Professors who have established academic records in overseas research universities.More information about the school can be found at:http://www.sem.tsinghua.edu.cn.

Congratulation on the 60^(th) anniversary of the China University of Petroleum with publication of Sedimentology of China (Second Edition)

【正】For the last 4-5 years,we,the editors of the Journal of Palaeogeo graphy(in Chinese)and the Journal of Palaeogeography(in English),and the teachers from College of Geosciences,China University of Petroleum(Beijing)altogether,taking spare time after our routine editing and teaching work,participated in the designation,organization,writing,editing and revision processes of the Sedimentology of China(Second Edition).We put great efforts into this great work which represents the latest research results of various domains of sedimentology in China.We specially published this

奥运奖牌可以被预测吗?——基于可解释机器学习视角

基于1992-2021年夏季奥运会的分项目成绩大数据,使用随机森林模型评估不同项目金牌和奖牌的可预测性,发现各项目存在较大的差异:对奖牌而言,可预测性最强的是乒乓球、羽毛球和游泳,而最弱的是水球、现代五项和排球。基于可解释机器学习方法挖掘社会经济因素对奥运奖牌的影响发现:(1)对同一个项目而言,女子项目的可预测准确性普遍高于男子项目;(2)代表队所在地区的人口规模、人均GDP、是否为主办国等因素对奖牌总数具有一定影响;(3)在特定项目上,代表队的传统优势(如中国的乒乓球、美国的田径等)对奖牌预测具有较大影响。

京津冀协同发展视域下校局同城一体化共建机制研究——以中国人民警察大学为例

推动京津冀公安机关和公安院校同城一体化建设,既是贯彻京津冀协同发展战略的必然要求,也是奋力开创公安工作现代化建设新局面的重要举措。分析同城一体化建设的时代背景、内涵特征、建设目标,以中国人民警察大学为例,提出实践路径:加强顶层设计,完善保障机制;突出科技引领,创新发展机制;聚焦人才共育,完善共享机制;坚持实战导向,强化联动机制;强化过程管理,健全落实机制;开展效益评价,建立反馈机制。

核磁共振谱的岩石孔喉结构分析

刘堂宴 ,王绍民 ,傅容珊 ,周明顺 ,李艳华 ,罗曼 .核磁共振谱的岩石孔喉结构分析 .石油地球物理勘探 ,2 0 0 3,38(3) :32 8～ 333岩心核磁共振 T2 谱和压汞分析数据均在一定程度上反映了岩石的孔喉结构 ,理论分析表明 ,这两组数据具有相关性。应用岩心核磁共振 T2 谱研究岩石孔喉结构 ,关键是确定 T2 与 Pc的转换系数。但以前的方法在 T2与 Pc 的转换过程中 ,需要涉及某些岩石特性参数 ,实用中有一定困难。本文直接利用岩心核磁共振 T2 谱和压汞分析数据之间的相关性 ,客观地确定 T2 与 Pc之间的转换系数 ,避免了确定岩石特性参数的困难。应用本文方法 ,对 6块岩心的多种核磁共振分析数据进行了对比分析 ,做出了 NMR (Nuclear Magnetic Resonance,简称NMR) T2 毛管力曲线和孔喉半径分布 ,并将这些结果与压汞分析的结果进行了对比。结果表明 ,岩心 NMR T2谱在实用性和评价精度上均略显优势 ;至少是在饱含油的条件下 ,岩心的 NMR T2 谱可以用于研究孔喉结构分布 ,油气的弛豫特性作为影响背景值存在 ,对于评价结果没有明显的影响 ;在全部 6块岩心中 ,T2 与 Pc 的转换系数位于 2 5 0 0～ 4 0 0 0μs· MPa之间。

基于Malmquist模型的北京市中医医院运行效率分析

目的分析北京市中医医院运行效率现状并对三级、二级中医医院进行对比分析,探索其影响因素并为医院决策提供建议。方法采用描述性统计分析方法描述各项指标基本情况,采用数据包络分析Malmquist指数模型分析运行效率及变化趋势。结果 2012—2013年9家三级医院全要素生产率上升,10家二级医院全要素生产率上升;2013—2014年6家三级医院全要素生产率上升,8家二级医院全要素生产率上升。结论近三年二级中医医院运行效率高于三级医院运行效率;三级医院运行效率差异明显,二级医院技术与效率同步提高;技术进步为医院运行效率提高有利因素;效率降低为医院运行效率降低主要原因。

结构-地基开放系统动力相互作用问题的高效解法

应用黏弹性人工边界将结构-地基开放系统转化为近似的封闭系统,利用等效地震波动输入方法将波动散射问题化为波源问题,再采用振型叠加法对近似封闭系统进行分析,由此建立了一种结构-地基开放系统动力反应问题的高效计算方法。采用高效算法分别计算了二维弹性半空间波源问题和地震作用下结构-地基动力相互作用问题算例,并与采用常规的直接时域逐步积分法给出的计算结果进行了对比,由此讨论了高效算法的特点。与常规直接动力分析方法相比,高效算法可以在确保模拟精度的同时,有效降低计算工作量、节省计算时间,并且结构-地基动力相互作用系统的模型越大、自由度越多,高效算法的优越性就越突出,从而为大型结构-地基系统动力相互作用问题数值分析提供了一种高效而精度足够的解法。

奥林匹克主义的历史哲学审视——兼评迪卡娅·凯泽斯塔提乌的“当代奥林匹克主义意识形态的本质变迁”

迪卡娅·凯泽斯塔提乌把奥林匹克主义看作一种被顾拜旦、卡尔.蒂姆、奥林匹克学院等"代理人"不断阐释与建构的元叙事哲学。在评述其博士论文并对奥林匹克主义进行历史哲学审视的基础上认为,立足批判现实主义的立场,以现代性、文化帝国主义、全球化理论为视角,运用质性研究范式,方可深刻阐释倡导普世伦理的奥林匹克主义与地缘政治、社会文化、经济博弈中的哲学议题。并指出多元文化主义是奥林匹克主义未来走向的必由之路。

铝酸钙系冶金熔剂和CaF_2对镁碳砖的侵蚀比较

为了降低精炼渣对钢包渣线镁碳砖的侵蚀,分别以20%(w)的冶金熔剂铝酸钙、铝镁酸钙和CaF2与80%(w)的初始钢渣配制成三种精炼渣,以镁碳砖为感应炉的坩埚,在坩埚内放入钢样,待钢样熔化并升温到1 600℃时,加精炼渣持续冶炼5 h(期间共更换渣8次),冷却后测镁碳砖渣线部位的侵蚀(渗透)深度并进行SEM分析。结果表明:以铝酸钙和铝镁酸钙为熔剂的精炼渣都比以CaF2为熔剂的精炼渣对镁碳砖的渗透浅、侵蚀小,而以铝镁酸钙冶金熔剂为精炼渣比以铝酸钙冶金熔剂为精炼渣对镁碳砖的渗透和侵蚀性都大大降低。这是由于铝镁酸钙中含有饱和的MgO,减缓了镁碳砖中MgO向CMA渣中的溶解,从而降低了渣对镁碳砖的侵蚀。

CT监测下经皮脊柱穿刺活检352例分析

目的:探讨术前CT监测下经皮穿刺活检的穿刺路径及器械选择的方法,分析其在脊柱疾患诊疗中的作用。方法:352例脊柱病变患者,包括颈椎155例(寰枢椎39例)、胸椎101例、腰椎81例、骶椎15例,采用CT监测下经皮穿刺活检的方法获得病理诊断。依病变的部位设计穿刺路径,根据病变内骨性成分多少选用穿刺器械取材。结果:352例中333例获得明确病理诊断,活检阳性率94.60%。手术137例,手术与穿刺标本的病理检查结果符合率95.62%。平均随访27个月,证实活检准确率为93.75%(330/352),无并发症发生。结论:CT监测下经皮穿刺活检是脊柱病变术前明确诊断的有效方法,其安全、准确率高、费用低,对制定脊柱病变的综合治疗方案起重要的作用。

国际视野下的大学生学习性投入研究——北京理工大学与美国顶尖研究型大学的比较

通过参与"全国大学生学习性投入"课题研究,并借用NSSE-China调查工具,对北京理工大学本科教育在五大可比指标上与美国顶尖研究型大学的表现进行了比较。研究发现,北京理工大学除了在校园环境支持度上与美国顶尖研究型大学不存在差异外,其他四个指标总体上都不如对方,尤其是在生师互动指标上,差异最为显著。但就低年级和高年级来看,北理工低年级学生的情况优于高年级,低年级学生在主动合作学习和教育经验丰富程度这两个指标上与美国同类院校无差异。

遥感估算植被覆盖度的角度效应分析

植被覆盖度是植被在地面的垂直投影面积占统计区总面积的百分比.由于植被反射的二向性特性,不同角度估算的植被覆盖度原则上不可比,另外,不同观测角度对应像元不同的采样面积,对于非均一地表这种面积差异引起的角度效应也非常显著.本文除了考虑植被的二向性反射,还重点模拟分析了由于像元的采样面积差异引起的角度效应及其带来的植被覆盖度估算误差.模拟结果表明:相比天顶观测,在倾斜40°观测时,对于作物和裸土混合,由于面积误差带来的红光波段反射率差异已高达56%,同时引起的植被覆盖度估算误差达到23%,因此研究植被覆盖度的角度效应问题很有必要.