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How random are matrix elements of the nuclear shell model Hamiltonian?

2009地球科学与技术国际学术讨论会

作者： Jiping Liu LASG Institute of Atmospheric Physics chinese academy of sciences {3. 100029 china

＜正＞Hypotheses,observations and models suggest that polar regions,particularly sea-ice,play a fundamental role in global climate through a multitude of polar-unique processes operating over a variety of time ***-ice research is therefore of great importance for our understanding of the Earth’s climate. In this paper,firstly,a brief overview of the rapid changes of the Arctic sea-ice is ***,recent progress of sea-ice simulations in the IAP/LASG coupled global climate model is ***, development of sea-ice thermodynamic parameterizations as the Arctic sea-ice enters a new regime of thinner and predominantly first-year ice associated with global warming is discussed.

关键词： sea ice arctic climate model

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Science china(Physics,Mechanics & Astronomy) 2009年第10期52卷 1477-1481页

作者： SHEN JiaJie1 & ZHAO YuMing1,2,3.4 1 Department of Physics,Shanghai Jiao Tong University,Shanghai 200240,china 2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 73.000,china 3.Nishina Center,Institute of Physical Chemical Research(RIKEN),Hirosawa 2-1,Wako-shi,Saitama 3.1-0198,Japan 4 CCAST,World Laboratory,beijing 100080,china Department of Physics Shanghai Jiao Tong University Shanghai 200240 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China Nishina Center Institute of Physical Chemical Research (RIKEN) Hirosawa 2-1 Wako-shi Saitama 351-0198 Japan World Laboratory CCAST Beijing 100080 China

In this paper we study the general behavior of matrix elements of the nuclear shell model *** find that nonzero off-diagonal elements exhibit a regular pattern,if one sorts the diagonal matrix elements from smaller to larger *** correlation between eigenvalues and diagonal matrix elements for the shell model Hamiltonian is more remarkable than that for random matrices with the same distribution unless the dimension is small.

关键词： nuclear shell model geometry property linear correlation randomize

An Effective Method for Testing Shadow Logicsin SoC Design

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International Journal of Systems and Control

International Journal of Systems and Control 2008年第3期 187-191页

作者： LIU Ze-xiang1,SHEN Xu-bang1,CHEN Lan21. graduate Faculty, Microelectronics Technology Institute,Xi'an 710054, china 2.EDA Center,chinese {3. of sciences,beijing 100029,china

Lots of reusable embedded cores and shadow logics exit in SoC design. In order to improve its test coverage, shadow logics test should be considered. General methods could be implemented easily with conventional tools, but their physical implementation costs are high. An effective method for testing shadow logics is presented in the paper without extra logics, and it has a sound universality.

关键词： DFT shadow logics SoC behavior model ATPG

Changes of landuse form and their ecological effect on desert-steppe area in Ningxia

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Journal of Geographical sciences 2000年第4期10卷 103-108页

作者： WEN Yun-chao1, FENG Han-ping1, YU Jiang-ping1, WANG Yi-ming2 (1.Institute of Geographic, sciences and Natural Resources Research, chinese academy of {3. 100101,china 2.National Land Division, Ningxia Economic Commission, Yinchuan, 750001, china) 中科院地理科学与资源所北京宁夏国土局宁夏银川

The central part of Ningxia is a desert-steppe area with a sparse population and fragile ecosystem where over-grazing has caused serious degeneration of steppe ecosystem; however, the southern part is a populous loessic hilly area subject to serious soil erosion. The central desert steppe has become an oasis with immigrants from southern loessic hilly area thanks to the implementation of new irrigated projects by pumping water from the Yellow River. Using government investment and loan of World Bank, the new irrigated area has been developed which covers an area of 3.,527 ha with 145 thousand immigrants moving there from the southern loessic hilly area in 1984-1994. A new ecosystem of oasis economy has been established, socio-economic, and environmental benefits achieved, and changes in land use were prominent. In the central desert steppe of Ningxia, except the original pasture and dryland farming, irrigational farming, horticulture and livestock breeding have been developed. As a result, artificial ecosystems of various types have been formed in the irrigated areas mentioned above. This paper will particularly discusses the changes of landuse patterns in resultant ecological effects, and the environemntal problems for sustainable development in the irrigated area. For the changes of landuse patterns, four aspects are relevant: the dryland was changed into irrigated land, the grassland became irrigated farmland, the agricultural landuse pattern changed and the cropping patterns also altered. The ecological benefits of the irrigated area are as follows: 1) the desert-steppe has been partially replaced by man-made oasis; 2) drinking water for human and livestock was guaranteed; 3. the shifting sand dunes in some areas were brought under control; 4) soil erosion was mitigated; 5) soil mellow process was accelerated and soil fertility increased; and 6) the eco-economic system was diversified. Finally, the authors identifies solutions to the environmental problems, incl

关键词： land use ecological effect irrigation suslainable development Ningxia

PRINCIPLES OF DESIGNING MEASUREMENT SYSTEMS AND THREE NEW KINDS OF MEASUREMENT INSTRUMENTS FOR SLOPE ENGINEERING

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Scientia Geologica Sinica 1998年第2期 27-37页

作者： Liu Ying and Shang Yanjun Institute of Geology, chinese academy of sciences, {3. 100029

１．ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｌｏｐｅｅｎｇｉｎｅｅｒｉｎｇ，ｗｈｉｃｈｉｓｒｅａｓｏｎａｂｌｙｒｅｇａｒｄｅｄａｓｏｎｅｋｉｎｄｏｆｏｐｅｎｃｏｍｐｌｅｘｈｕｇｅｓｙｓｔｅｍ（ＱｉａｎＸｕｅｓｈｅｎ，ＹｕＪｉ...

１．ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｌｏｐｅｅｎｇｉｎｅｅｒｉｎｇ，ｗｈｉｃｈｉｓｒｅａｓｏｎａｂｌｙｒｅｇａｒｄｅｄａｓｏｎｅｋｉｎｄｏｆｏｐｅｎｃｏｍｐｌｅｘｈｕｇｅｓｙｓｔｅｍ（ＱｉａｎＸｕｅｓｈｅｎ，ＹｕＪｉｎｇｙｕａｎ，ｅｔａｌ．，１９９０...

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High-resolution climate recorded in the δ13. of Porites lutea from Nansha Islands of china

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Progress in Natural Science:Materials International 2002年第4期 46-50页

作者： YU Kefu, LIU Tungsheng , CHEN Tegu , ZHONG Jinliang and ZHAO Huanting( South china Sea Institute of Oceanology, chinese academy of {3., Guangzhou 5103.1, china Institute of Geology and Geophysics, chinese academy of {3., beijing 100029, china) South china Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

A Porites Lutea core from Yongshu Reef of Nansha Islands covering 50-year growth history is analyzed for carbon iso-topic composition with monthly and seasonal resolution, and the results show that the coral δ13. generally has clear yearly cycles. The calibration indicates that the coral δ13. can record the sunshine duration, total cloud cast and rainfall of the Yongshu Reef, and it also shows significant association to El Nino events. From 1950 to 1999, the δ13. shows a clear long-term declining trend, which indicates a decrease in the sunshine duration and an increase in cloud cast and rainfall over Yongshu Reef over the past fifty years.

关键词： Nansha Islands Parties lutea δ13. sunshine duration EI Nino.

In vitro release of 1,3.bis(2-chloroethyl)-1-nitrosourea sustained-release microspheres and the distribution in rat brain tissues

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Neural Regeneration Research 2006年第9期1卷 793-796页

作者： Xia Li1, Liping Guo2, Qin Li3.1Central Pharmacy, General Hospital of chinese People’s Armed Police Forces, beijing 10003., china 2Department of Pharmaceutics, Zhengzhou Central Hospital, Zhengzhou 450007, Henan Province, china 3.eda International Cardiovascular Hospital, Tianjin 3.0457, china Central Pharmacy General Hospital of Chinese People's Armed Police Forces Beijing 100039 China Department of Pharmaceutics Zhengzhou Central Hospital Zhengzhou 450007 Henan Province China Teda International Cardiovascular Hospital Tianjin 300457 China

BACKGROUND: The implantation of released chemotherapeutic drugs, which takes biodegradable polymer as vector, into the tumor site can get high concentration and release the drug for a long time, it can directly act on the tumor cells, and reduce the general toxicity. OBJECTIVE: To explore the in vitro and in vivo course of 1,3.bis(2-chloroethyl)-1-nitrosourea (BCNU) sustained-release from BCNU-loaded polylactide (PLA) microspheres (MS) and location in rat brain tissue. DESIGN: A repetitive measurement. SETTING:Central Pharmacy, General Hospital of chinese People’s Armed Police Forces. MATERIALS: Thirty male SD rats were used. PLA (Mr5000, batch number: KSL83.7) was produced by Wako Pure Chemical Inc.,Ltd. (Japan); BCNU (batch number: 021121) by Tianjin Jinyao Amino Acid Co., Ltd.; BCNU-PLA-MS was prepared by the method of solvent evaporation and pressed into tablets (10 mg/tablet). High-performance liquid chromatography (HPLC) Agilent 1100 (USA); LS9800 liquid-scintillation radiometric apparatus (Beckman). Chromatographic conditions: Elite Hypersil ODS2 C18 chromatographic column (5 μm, 4.6 mm×150 mm); Mobile phase: methanol: water (50:50), flow rate was 1.0 mL per minute, wave length of ultraviolet detection was 23. nm, and the inlet amount of samples was 10 μL. METHODS: The experiments were carried out in the experimental animal center of the General Hospital of chinese Armed Police from May 2004 to July 2005. ① In vitro BCNU-PLA-MS release test: BCNU-PLA-MS was prepared by the method of solvent evaporation, then placed in 0.1 mol/L phosphate buffered solution (PBS, pH 7.4, 3. ℃), part of MS were taken out at 1, 2, 3. 7, 10 and 15 days respectively, and the rest amount of BCNU in MS was determined by HPLC, then the curve of BCNU-PLA-MS release was drawn. ②In vivo BCNU-PLA-MS release and distribution test: The rats were anesthetized, then BCNU-PLA-MS were implanted to the site 1 mm inferior to the cortex of frontal lobe. Five rats were killed postoperatively at 4 h

关键词： BCNU MS PLA nitrosourea sustained-release microspheres and the distribution in rat brain tissues chloroethyl

A quantified study method and its application to sustainable management of water resources in arid basins

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Science china Earth sciences 2007年第S1期 9-15页

作者： ZUO QiTing1,2, ZHOU KeFa1, XIA Jun3. CHEN Xi1 & WANG YongQin4 1 Xinjiang Institute of Ecology and Geography, chinese academy of sciences, ürümqi 83.011, {3. 2 College of Environment and Water Conservancy, Zhengzhou University, Zhengzhou 450002, {3. 3.Institute of Geographical Science and Natural Resources, chinese academy of sciences, beijing 100101, {3. 4 Xinjiang Tarim River Basin Management Bureau, Korla 841000, {3.

According to the features of the basins in arid areas, in this paper a quantified study framework of sustainable management of water resources is developed, and the contents include mainly the quanti-fication rules, index system, basic models and quantification method. A quantified study method (M-D method) about sustainable management of water resources is put forward based on the simulation and integrative development degree. In the method, the fuzzy subordinatness description and the multi-rule integration are used to calculate the integrative development degree so as to quantitatively describe the sustainable development degree of economic society; the mathematical simulation is used to quantitatively describe the interactions between water resources, economic society and ecosystems so as to lay a foundation for quantitatively giving expression to the development situation of economic society related to the management of water resources; based on the organic combination of these two, quantification rules and other constraint conditions, a quantified model of water resources manage-ment is developed. The M-D method is applied to developing a scientific scheme of water resources management in the Bosten Lake Basin, Xinjiang, china.

关键词： sustainable management of water resources arid area drainage basin quantified study method integrative development degree (DD)

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空间望远镜主镜面形静态控制方法

系统仿真学报 2009年第6期21卷 1693-1696页

作者：戴妍峰刘藻珍中国科学院国家天文台北京100012 北京理工大学宇航学院北京100081

空间望远镜分块式主镜的面形由其背后布置的若干致动器进行高精度控制。为了提高面形控制精度,设计了基于主镜面形非线性模型的模型预测修正法和非线性最小二乘法。并应用BP神经网络建立了主镜面形和致动器作用力之间的逆模型,提出了神... 详细信息

空间望远镜分块式主镜的面形由其背后布置的若干致动器进行高精度控制。为了提高面形控制精度,设计了基于主镜面形非线性模型的模型预测修正法和非线性最小二乘法。并应用BP神经网络建立了主镜面形和致动器作用力之间的逆模型,提出了神经网络非线性逆控制法。仿真结果表明应用这三种方法对空间望远镜进行在线控制,控制精度均优于线性最小二乘控制法。

关键词：分块式主镜面形控制单纯形法神经网络逆控制