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The age of the plant fossil assemblage in the Liuqu Conglomerate of southern Tibet and its tectonic significance

Progress in Natural Science:Materials International 2006年第1期16卷 55-64页

作者： FANG Aimin1, YAN Zhen1, LIU Xiaohan2, PAN Yusheng1, LI Jiliang1, YU Liangjun1, HUANG Feixing2 and TAO Junrong3.(1.Laboratory of Lithosphere Tectonic Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. Institute of Tibet Plateau Research, Chinese Academy of Sciences, Beijing 100085, China 3. Institute of Botany, Chinese A cademy of Sciences, Beijing 100093. China) Laboratory of Lithosphere Tectonic Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Institute of Tibet Plateau Research Chinese Academy of Sciences Beijing 100085 China Institute of Botany Chinese A-cademy of Sciences Beijing 100093 China

The Liuqu Conglomerate, situated to the south of Yarlung Tsangbo Suture Zone (YTSZ), is a suit of molasse formed in a foreland basin of the Himalayan orogenic belt after the collision between the two plates of the Indian and Eurasion, It is of great significance in constraining the younger limit time of the collision of the two plates and providing stratigraphic evidence to reveal the post-colli sional tectonic evolution and uplifting history of the Tibet plateau. However, the age of this molasse suit and its correlation to other synchronous strata distributed in southern Tibet have been in great disputes for a long time. Especially in recent years, argues on its ages are growing violently with the recognition of the great sedimentary tectonic significances of this molasse. During the field work carried out recently on this molasse suit, a lot of plant fossils were found preserved in fairly good conditions in the upper part of this strata, which is of great help in determining its age. By identification, the assemblage of the plant fossils belongs to a tropic to subtropic flora developed in the southern margin of the Northern Hemisphere supercontinent during the Middle to Later Eocene, which can provide good constraint on its formation age. This paper is to give a brief introduction of the plant assemblage and its age, and to discuss their tectonic significances.

关键词： Liuqu conglomerate plant fossils age Eocene Tectonic implications.

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Zhang-Xuan thermal uplift and its genesis

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Progress in Natural Science:Materials International 2005年第8期15卷 725-732页

作者： SHAO Ji'an1*, NIU Shuyin2, ZHANG Lüqiao3.and LI Hongyang2(1. School of Earth and Space Sciences, Peking University, Beijing 100871, China 2. Shijiazhuang University of Economics, Shijiazhuang 05003., China 3. Geological Bureau of Inner Mongolia, Huhhot 010020, China) School of Earth and Space Sciences Peking University Beijing 100871 China. Shijiazhuang University of Economics Shijiazhuang 050031 China. Geological Bureau of Inner Mongolia Huhhot 010020 China

Based on the researches of the Mesozoic thermal evolution history, the deformed structures, and fission track analysis of the Zhangjiakou-Xuanhua area, we obtained the following knowledge: the area experienced in 140 Ma an underplating which is marked by emplacement of mantle derived magma; during 13.—110 Ma a series of eruptions and intrusions happened, and during 80—10 Ma a rising process occurred which is synchronous with the adjacent Taihang and Yanshan Mountains and was accompanied by a series of structures down slipping from the just formed Zhang-Xuan uplift toward its periphery. Combining the Zhang-Xuan thermal lift with the large detachment structure in Baoding depression of the North China Basin in the Late Mesozoic confirms that an even larger extensional tectonic background existed in North China during this period.

关键词： Zhang-Xuan area underplating thermal uplift fission track extensional structure.

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Zonal propagation of kinetic energy and convection in the South China Sea and Indian monsoon regions in boreal summer

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Science China Earth Sciences 2004年第12期47卷 1076-1084页

作者： CHEN Longxun 1 ,GAO Hui 2 ,HE Jinhai 2 ,TAO Shiyan 3.& JIN Zuhui 3.1.Chinese Academy of Meteorological Sciences,Beijing 100081,China 2.Nanjing Institute of Meteorology,Nanjing 210044,China 3.Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China 1. Chinese Academy of Meteorological Sciences 100081 Beijing China 2. Nanjing Institute of Meteorology 210044 Nanjing China 3. Chinese Academy of Sciences Institute of Atmospheric Physics 100029 Beijing China

Zonal propagation of kinetic energy (KE) and convection in the South China Sea (SCS) and Indian summer monsoon areas are examined in present study. Results suggest that the SCS and Indian summer monsoon prevailed regions (5 —15°N) are dominated by the southwesterly wind, however, the disturbances of KE at 850 hPa and convection are observed mainly coming from the western Pacific Ocean (140—150°E), after passing through the SCS, and westward propagated into the Bay of Bengal (90—100°E). In the Indian summer monsoon domain, where the disturbances of KE are found mainly coming from the Arabian Sea (AS) and eastward propagated into the Bay of Bengal. Therefore, the SCS and the Indian summer mon- soon are quite different in zonal propagation of KE and convection. The SCS summer monsoon is mainly affected by the KE and convection coming from the tropical western Pacific. The Indian summer monsoon, however, can be partly influenced by the AS and the SCS summer monsoon. The analysis also suggests that the interaction region between the SCS and the Indian summer monsoon is around 90—95°E, rather than 105°E as proposed by earlier studies.

关键词： zonal propagation of KE and convection, East Asian monsoon, Indian monsoon.

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生态系统服务权衡/协同关系的阈值识别研究

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生态学报 2024年

作者：荀斌郑莹范蓉郝蕊芳刘宝印 1.西北大学城市与环境学院 2.陕西省地表系统与环境承载力重点实验室 3.陕西西安城市生态系统定位观测研究站 4.北京林业大学水土保持学院 5.中国科学院科技战略咨询研究院西北大学城市与环境学院陕西省地表系统与环境承载力重点实验室陕西西安城市生态系统定位观测研究站北京林业大学水土保持学院中国科学院科技战略咨询研究院

生态系统服务权衡/协同关系的时空格局变化和关键阈值识别对区域生态保护与修复工程的建设和效益评价具有重要参考意义。已有研究主要关注生态保护和修复工程带来的生态系统服务及其权衡/协同关系的变化，很少将生态恢复的阈值效应考虑... 详细信息

生态系统服务权衡/协同关系的时空格局变化和关键阈值识别对区域生态保护与修复工程的建设和效益评价具有重要参考意义。已有研究主要关注生态保护和修复工程带来的生态系统服务及其权衡/协同关系的变化，很少将生态恢复的阈值效应考虑其中。本研究以陕西省为例，采用基于生态系统服务权衡/协同关系构建的生态获益指数，评价了2000和2020年净初级生产力、土壤保持和产水服务的协同供给能力；利用地理探测器和约束线方法分析了生态系统服务协同供给能力的主导影响因素和阈值特征。结果表明：与2000年相比，2020年陕西省净初级生产力、土壤保持和产水服务均有所增加，两两生态系统服务之间总体表现为协同关系，但具有明显的时空差异。2020年生态系统服务协同供给能力明显增加，其中陕北中部和陕南西部提升最为明显。降水和归一化植被指数（NDVI）是生态系统服务协同供给能力的主导影响因素，他们对生态系统服务协同供给能力的影响具有非线性效应和阈值特征。当NDVI在0.6—0.7之间或年降水量为1100 mm左右时，生态系统服务协同供给能力达到最高，超过上述阈值后NDVI或降水对生态系统服务协同供给能力的促进作用减弱。本研究能够为生态恢复效益评价提供参考方案，也能为陕西省生态保护和恢复建设提供决策支持。

关键词：生态恢复生态系统服务权衡/协同关系生态阈值陕西省

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库车坳陷早始新世短暂海侵演化史：来自锶同位素的证据

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矿物学报 2024年

作者：曾锡泽徐洋张华黄振宁 1.东华理工大学地球科学学院 2.东华理工大学核资源与环境国家重点实验室 3.中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室东华理工大学地球科学学院东华理工大学核资源与环境国家重点实验室中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室

塔里木盆地在晚白垩世-古近纪主要识别出5次海侵-海退旋回，其中晚古新世-早始新世海侵事件是规模最大的一次。目前对于库车坳陷早始新世海侵演化史的研究还比较薄弱，尤其是通过碳酸盐岩锶同位素手段对其开展研究还尚未涉及。本文通过... 详细信息

塔里木盆地在晚白垩世-古近纪主要识别出5次海侵-海退旋回，其中晚古新世-早始新世海侵事件是规模最大的一次。目前对于库车坳陷早始新世海侵演化史的研究还比较薄弱，尤其是通过碳酸盐岩锶同位素手段对其开展研究还尚未涉及。本文通过对库车坳陷西部小库孜拜剖面下始新统蒸发岩段进行岩相学特征分析和碳酸盐岩锶同位素组成研究，以期探讨该地区早始新世海侵演化历史。根据岩相学特征和蒸发岩沉积序列变化，认为早始新世库车坳陷气候炎热干燥，主要发育障壁潟湖相。研究表明小库孜拜剖面下始新统灰岩锶同位素组成介于0.708 627～0.708 909之间，略高于同时期海水锶同位素值（0.707 7～0.707 8），远低于同期陆源锶同位素值，结合泥晶灰岩镜下特征和锶同位素特征，本文认为该时期主要以海水沉积为主，伴有少量陆源物质输入。对比小库孜拜组灰岩和西藏岗巴地区碳酸盐岩锶同位素组成演化曲线和硫同位素组成变化，推测早始新世库车坳陷发生一次短暂的海侵事件，海平面变化原因可能是对全球海平面变化的响应。

关键词：锶同位素碳酸盐岩海平面变化库车坳陷

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Surface roughness and removal rate in magnetorheological finishing of a subsurface damage free surface

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Progress in Natural Science:Materials International 2005年第6期15卷 538-544页

作者： CHENG Haobo1*, WANG Yingwei2, FENG Zhijing1 and CHENG Kai3.1. State Key Laboratory of Tribiology, Tsinghua University, Beijing 100084, China 2. Department of Material Sciences, Changchun University of Science and Technology, Changchun 13.021, China 3. Faculty of Information and Engineering Systems, City Campus, Leeds LS1 3.E, UK) State Key Laboratory of Tribiology Tsinghua University Beijing 100084 China Department of Material Sciences Changchun University of Science and Technology Changchun 130021 China Faculty of Information and Engineering Systems City Campus Leeds LS1 3HE UK

Based on computer-controlled optical surfacing, a new technique called magnetorheological finishing (MRF), is presented. The new technique combines the features of conventional loose abrasive machining with a wheel shaped polishing tool. The tool incorporates a host of features and has unprecedented fabricating versatility. The pre-polishing and fine polishing processes can be performed only by adjusting different parameters. The material removal function is studied theoretically and the results of simulation present a Gaussian distribution feature. Based on the established theoretical model, material removal rate experiments involving a parabolic mirror are designed and carried out to determine the effect of controllable parameters on size of the gap between the workpiece and the polishing wheel, rotating speed of the polishing wheel, concentration of volume fraction of non-magnetic particles and polishing time. Further experiments are carried out on the surface microstructure of the workpiece, the final surface roughness with an initial value of 10.98 nm reaches 1.22 nm root mean square (RMS) after 20 min of polishing. The subsurface damage experiment and the atomic force microscopy (AFM) measurement on the polished surface can also verify the feasibility of the MRF technique.

关键词： magnetorheological finishing surface roughness computer controlled optical surfacing subsurface damage removal function.

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Human hepatopoietin augmenter of liver regeneration──A hepatotrophic factor for liver regeneration, and its potential antihepatitis effect in vivo

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Chinese Science Bulletin 1998年第12期43卷 1026-1031页

作者： YANG Xiaoming 1, WANG Aimin 2, ZHOU Ping 3. XIE Ling 1, WANG Qingming 1, WU Zuze 1 and HE Fuchu 1 1. Institute of Radiation Medicine, Beijing 100850, China 2. No. 252 Hospital of PLA, Baoding 071000, China 3. General Hospital of the Air Institute of Radiation Medicine Beijing China No. 252 Hospital of PLA Baoding China General Hospital of the Air Force of PLA Beijing China

The effect of human hapatopoietin i.e. augmenter of liver regeneration (hALR) was determined on hepatocyte DNA synthesis, and on CCl 4-induced hepatitis in animal in vitro and in vivo. It is found that ALR could directly stimulate DNA synthesis of hepatocytes in primary culture in a dose-dependent manner. In 3.% hepatectomied rats, significant DNA synthesis occurred in control rats ; even so, exogenous hALR gene encoding protein increased DNA synthesis of regeneration liver by 2.3.fold compared with control rats. A lower dose of CCl 4 was administrated in rats and the effect of ALR on DNA synthesis of regenerating liver 48 h after CCl 4 administration was analyzed. Few Budr-labeled hepatocytes were visible in control rats. However, exogenous hALR markedly increased the number of labeled cells in a dose-dependent manner. Statistical analysis showed that 10 or 40 μg·kg -1 ALR protein stimulated DNA synthesis by 1.7 and 4.8 fold respectively. In addition to enhancing cell growth, adiministration of hALR achieved a significant improvement in reversing the lethality of rat hepatic failure when compared with that of control group; the elevation of cytosolic enzymes was dramatically suppressed by exogenous hALR in CCl 4-treated mice in vivo and in vitro; histologically, hepatocytes around the central vein were necrotic, and the degree of hepatocyte necrosis in control mice was more prominent than that in the mice given 40 μg·kg-1 hALR 48 h after CCl 4 administration. We also noted that hALR had a strong antihepatitis effect in vitro which was determined with primary cultured rat hepatocytes. These findings suggest that hALR protects the integrity of hepatocytes against severe hepatitis, and indicate that ALR may be an important regulator of liver regeneration and play a major role in liver injury repair. It proves ALR adminstration to be a useful treatment to accelerate liver regeneration and to prevent the onset of hepatitis or intrahepatic cholestasis induced by toxin.

关键词： liver regeneration hepatopoietin DNA synthesis hepatitis.

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词素效应到底是什么?——来自维吾尔语的证据

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心理学报 2004年第5期36卷 515-524页

作者：玛依拉.亚克甫 3.周晓林北京大学心理学系北京大学脑科学与认知科学中心北京100871

利用维吾尔语的一些特点 ,采用视觉 -视觉启动听觉 -视觉跨通道启动、和延迟重复启动等三种启动技术 ,改变目标词和启动词之间在词素、词形以及语义上的多种关系 ,通过比较启动效应的异同 ,来考察词素效应是否可以还原为词形启动效应、... 详细信息

利用维吾尔语的一些特点 ,采用视觉 -视觉启动听觉 -视觉跨通道启动、和延迟重复启动等三种启动技术 ,改变目标词和启动词之间在词素、词形以及语义上的多种关系 ,通过比较启动效应的异同 ,来考察词素效应是否可以还原为词形启动效应、语义效应 ,是否可以看成是词形和语义在实时加工中相互作用的后果 ,从而探讨词汇加工中词素效应的实质。实验一发现 ,在明确配对的视觉 -视觉和跨通道启动中 ,启动词和目标词之间只有在具有词素加语义关系 (+m +o +s /D ,+m +o +s /R ;其中m代表词素 ,o代表词形 ,s代表语义 ,D代表目标词为派生词 ,R代表目标词为自由词根 ;+表示启动词和目标词之间在某个维度上相关 ,-表示启动词和目标词之间在某个维度上无关 )时或者仅仅具有语义关系 (-m -o+s /D)时 ,才有显著的启动效应。如果启动词与目标词之间仅仅具有词素 (词形 )关系 ,而没有语义关系 (+m +o -s /D) ,或者仅仅具有词形关系 (-m +o -s /R) ,它们之间的启动效应微乎其微。实验二通过使用维吾尔语中的借词和延迟启动技术 ,比较了词素加语义加词形 (+m +o +s /D)启动和语义加词形启动 (-m +o +s /D)以及语义启动 (-m +o+s /D) ,发现词素启动效应并没有不同于其他启动条件下的效应。两个实验都表明。

关键词：词汇加工词素启动维吾尔语连接主义

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山西省财政厅等4部门关于印发《煤层气矿业权占用费征收暂行办法》的通知(晋财规综〔2024〕1号)

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山西省人民政府公报 2024年第5期 33-34页

作者： 1.山西省财政厅 2.山西省自然资源厅 3.国家税务总局山西省税务局 4.中国人民银行山西省分行山西省财政厅山西省自然资源厅国家税务总局山西省税务局中国人民银行山西省分行

各市、县(市、区)财政局、自然资源主管部门,国家税务总局山西省各市、县(市、区)税务局、国家税务总局山西转型综合改革示范区税务局、国家税务总局山西省税务局第二税务分局,中国人民银行各市分行,有关企业:为深化煤层气勘查开采管理... 详细信息

各市、县(市、区)财政局、自然资源主管部门,国家税务总局山西省各市、县(市、区)税务局、国家税务总局山西转型综合改革示范区税务局、国家税务总局山西省税务局第二税务分局,中国人民银行各市分行,有关企业:为深化煤层气勘查开采管理体制改革,有效防范矿业权市场中的“跑马圈地”“圈而不探”行为,根据煤层气价格变动情况和经济发展需要,我们制定了《煤层气矿业权占用费征收暂行办法》,已经省人民政府批准,现印发你们,请遵照执行。

关键词：国家税务总局价格变动情况山西省财政厅占用费税务分局矿业权市场暂行办法资源主管部门

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Direct CP violation in hadronic B decays

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Science China(Physics,Mechanics & Astronomy) 2006年第3期49卷 357-366页

作者： HONG Bihai1,2 & Lü Caidian3.1. Department of Physics, Lishui University, Lishui 3.3.00,China 2. Department of Physics, Shanghai Jiaotong University, Shanghai 20003., China 3. Institute of High Energy Physics, Beijing 100049,China Department of Physics Lishui University Lishui 323000 China Department of Physics Shanghai Jiaotong University Shanghai 200030 China Institute of High Energy Physics Beijing 100049 China

There are different approaches for the hadronic B decay calculations, recently. In this paper, we upgrade three of them, namely factorization, QCD factorization and the perturbative QCD approach based on kT factorization, using new parameters and full wave functions. Although they get similar results for many of the branching ratios, the direct CP asymmetries predicted by them are different, which can be tested by recent experimental measurements of B factories.

关键词： CP violation hadronic B decay factorization.

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