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| 1 | Some Suggested Future Directions ofQuantitative Resource Assessments显示文摘Future quantitative assessments will be expected to estimate quantities, values, and locations of undiscovered mineral resources in a form that conveys both economic viability and uncertainty associated with the resources. Historically, declining metal prices point to the need for larger deposits over time. Sensitivity analysis demonstrates that the greatest opportunity for reducing uncertainty in assessments lies in lowering uncertainty associated with tonnage estimates. Of all errors possible in assessments, these affecting tonnage estimates are by far the most important. Selecting the correct deposit model is the most important way of controlling errors because of the dominance of tonnage-deposit models are the best known predictors of tonnage. Much of the surface is covered with apparently barren rocks and sediments in many large regions. Because many exposed mineral deposits are believed to have been found, a prime concern is the presence of possible mineralized rock under cover. Assessments of areas with resources under cover must rely on extrapolation from surrounding areas, new geologic maps of rocks under cover, or analogy with other well-explored areas that can be considered training tracts. Cover has a profound effect on uncertainty and on methods and procedures of assessments because geology is seldom known and geophysical methods typically have attenuated responses. Many earlier assessment methods were based on relationships of geochemical and geophysical variables to deposits learned from deposits exposed on the surface-these will need to be relearned based on covered deposits. Mineral-deposit models are important in quantitative resource assessments for two reasons: (1) grades and tonnages of most deposit types are significantly different, and (2) deposit types are present in different geologic settings that can be identified from geologic maps. Mineral-deposit models are the keystone in combining the diverse geoscience information on geology, mineral occurrences, geophysics, and geochemistry used in resource assessments and mineral exploration. Grade and tonnage models and development of quantitative descriptive, economic, and deposit density models will help reduce the uncertainty of these new assessments. | Singer Donald A U. S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025, USA | 2001 | Journal of China University of Geosciences2001，12，1： | 15 |
| 2 | Transretinoic acid inhibits rats gastric epithelial dysplasia induced by N-methyi-N-nitro-N-nitrosoguanidine:influences on cell apoptosis and expression of its regulatory genes显示文摘INTRODUCTIONGastric epithelial dysplasia (GED) hypothetically is a straight-forward concept: dysplastic epithelium replacing the normal gastric epithelium of the stomach [1].In the stomach ,like any other segment of the gut ,it is defined as an unequivocal non-invasive epithelial change[2,3].The observation of gastric dysplasia as a cancerous lesion was recognized over a century ago ,but it is only after the advent of gastroscopy that its clinical significance has been stressed[4-7]. | Ru Tao Cui~1 Gan Cai~2 Zhao Bao Yin~(2*) Yong Cheng~2 Qiu Hong Yang~1 Tao Tian~(3#) ~1Liver Center,Beijing Friendship Hospital Affiliated to CapitalUniversity of Medical Sciences~2Department of Gastroenterology,Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine,Shanghai China and Department of Pathophysiology.Shanghai Medical University.Shanghai,China ~3Pathological Department,Shanghai Medical University (?)Now working at UCLA,USA ~#Now working at University of Michigan,USADr.Ru Tao Cui graduated and got the bachelor degree from Shandong University of Traditional Chinese Medicine in 1994,got doctor degree from Shanghai University of Traditional Chinese Medicine in 2000,now studying as a postdoc,majoring gastroenterology,having 29 papers published. | 2001 | World Journal of Gastroenterology2001，7，3： | 8 |
| 3 | The Asymptotic Behavior of a Class of Second Order Differential Equation显示文摘In the paper the asympotic behavior of the solution of the following second order differential equation y+ q(t)f(y) =0 is investigated. Some results for asymptotic behavior of the nonoscillation solution are obtained. | FENG Zhao-sheng, WANC Xiao-hui, LI Jin-cheng ( Dept. of Math., Texas A&M University, College Station, TX 77843, USA Dept. of Stat., Texas A&M University, College Station, TX 77843, USA Basic Dep., Tianjin Vocational Tech. & Teaching College, Tianjin 3 | 2001 | Journal of Mathematical Research and Exposition2001，21，3： | 6 |
| 4 | Posterior gut development in Drosophila:a model system for identifying genes controlling epithelial morphogenesis显示文摘The posterior gut of the Drosophila embryo, consisting of hindgut and Malpighian tubules, provides a simple,well-defined system where it is possible to use a genetic approach to define components essential for epithelial morphogenesis.We review here the advantages of Drosophila as a model genetic organism, the morphogenesis of the epithelial structures of the posterior gut, and what is known about the genetic requirements to form these structures.In overview, primordia are patterned by expression of hierarchies of transcription factors; this leads to localized expression of cell signaling molecules, and finally, to the least understood step: modulation of cell adhesion and cell shape. We describe approaches to identify additional genes that are required for morphogenesis of these simple epithelia, particularly those that might play a structural role by affecting cell adhesion and cell shape. | LENGYEL JUDITH A XUE JUN LIU (Department of Molecular, Cell and Developmental Biology University of California at Los Angeles, Los Angeles, CA USA, 90095-1606 USA) | 1998 | Cell Research1998，8，4： | 5 |
| 5 | Internet-based collaborative pseudo-dynamic testing of multi-span bridge structure显示文摘In this paper, the first Internet-based collaborative pseudo-dynamic testing of a multi-span bridge system in China's Mainland is presented in detail, which has been carried out by the collaboration of Hunan University (HNU), Harbin Institute of Technology (HIT) and Tsinghua University (TU) in China's Mainland, and the University of Southern California (USC) in the USA. The prototype system of Russion River Bridge at Southern California in America is illustrated. Different testing specimens, testing equipments and substructure boundary conditions at HNU and HIT laboratories are described. A network protocol platform for collaborative pseudo-dynamic testing, called NetSLab, and some function modules developed on the use of its standardized interface are introduced. Aiming at the MTS system widely used in structural testing, two approaches are presented to implement the communication interface between NetSLab and testing equipment, respectively, studied by HNU and HIT. The integrated networked testing system and collaborative testing procedures are presented. The testing results manifest that the networked collaborative testing system with powerful capability provides a testing platform with good coordination for complex models or actual structures, and achieves remote sharing of testing equipments. | Dapeng Wang a, Shizhu Tiana, Xinjiang Caia, Yunlei Fan b, Yan Xiaob,c a School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China b School of Civil Engineering, Hunan University, Changsha 410082, China c Department of Civil Engineering, University of Southern California, Los Angeles, CA 90089, USA | 2009 | Progress in Natural Science:Materials International2009，19，5： | 4 |
| 6 | THE BENCHMARK LAND PRICE SYSTEM AND URBANLAND USE EFFICIENCY IN CHINA显示文摘ABSTRACT: China began to introduce market principles and establish price mechanism to better manage land and improve land use efficiency in the late 1980s. Since then, land markets begin to emerge. A benchmark land price system, providing guidelines for land use rights selling and transferring, was established in order to overcome lack of market data and experiences in land transaction. The benchmark prices of land use rights are determined by land use, land use density (floor-land ratio), land grades, land improvement, and tenant resettlement costs. This paper first conducts a formal analysis based on modern urban economic theory. The formal model provides a theoretical foundation in which the benchmark land price system is assessed and evaluated in terms of land use and urban development. The paper then concludes that the benchmark price system has two theoretical problems. One is associated with the fact that floor-land ratio plays an important role in land price determination whereas the theory suggests the other way around. That is, floor-land ratio depends on land prices. The other problem is that the benchmark land price system does not provide adequate room for the substitution between land and capital inputs. The substitution is a key in achieving land use efficiency in land markets and urban development process. It is concluded that the practice of the benchmark land price system is at odd with reforms that aim to introduce market principles and mechanism to guide resource uses. Therefore, it is recommended that further land policy reform should be taken. | DING Cheng-ri(Department of Landscape Architecture and Urban Planning, Texas A &M University, Mail Stop 3137College Station, TX, 77843, USA) | 2001 | Chinese Geographical Science2001，11，4： | 4 |
| 7 | 用于电力系统仿真的潮流控制器模型显示文摘本文描述了—族基于可关断晶闸管(GTO)电压源逆变器的电力系统控制装置,介绍了静补(STATCON)、串联潮流控制器(SPFC)和统一潮流控制器(UPC)的稳态模型。静补是由美国的EPRI、TVA和西屋科技中心联合开发的基于逆变器的并联装置、不久它将被安装在TVA的16lkV输电系统上用于控制线路电压。而串联潮流控制器和统一潮流控制器则代表了静补在串联应用方面的拓展。这些装置的建模可以结合到现有的大型电力系统分析程序之中供系统稳态研究使用。IEEE的30母线试验系统的仿真结果证明了这些电压源潮流控制装置的稳态性能。UPFC具有能同时对线路的有功与无功潮流独立地进行控制的能力,可以认为它特别适用厂输电潮流控制。 | J. Bian Meniber T. A Lemak Member(Power benration Business Unit Science and Technology CenterWestinghouse Electric Corporation. Pittsburrgh, PA, USA)K J. Nelson Member D. G. Ramey Aenior Member(Power Genration Business UnitWestinghouse Electric Corporat | 1995 | 电网技术1995，19，9： | 3 |
| 8 | 直接评估吗啡刺激糖尿病人隐静脉内皮一氧化氮释放减少显示文摘to directly measure in real time basal and stimulated levels of NO released from human saphenous vein endothelium and to quantify the expression of the μopiate receptor, which has been linked with NO release. METHODS: Saphenous vein segments from patients with type 2 diabetes ( n = 12) and patients without diabetes (n =8) were obtained. The release of NO was measured directly from the endothelium using a NO-specific amperometric probe. NΩ-nitro-L-arginine methyl ester (L-NAME, 0.1 mmol/L), a NO synthase (NOS) inhibitor, or morphine (1 μmol/L), a stimulant, was administered and the measurements were repeated. Values were reported relative to the mean initial measurement of NO release from diabetic endothelium, which was defined as the relative zero level of NO release. A RT-PCR was then performed on the endothelium to measureμ opiate receptor expression. RESULTS: Diabetic patients (n = 12) showed a relative and significantly diminished basal level of released NO, (0.049± 0.012) nmol/L, compared | Thomas V BILHNGER, James A VOSSWINKEL, Patrick CADET, Christos M RIALAS, Harold I MAGAZINE, George B STEFANO(Division of Cardiothoracic Surgery, Department of Surgery, University Hospital and Medical Center, HSC, T19-080, Stony Brook, New York 11794-8191 Neuroscience Research Institute, State University of New York College at Old Westbury, Old Westbury, New York , USA) | 2002 | Acta Pharmacologica Sinica2002，23，2： | 3 |
| 9 | Modeling contaminant transport in homogeneous porous media with fractional advection-dispersion equation显示文摘The newly developed Fractional Advection-Dispersion Equation (FADE), which is FADE was extended and used in this paper for modelling adsorbing contaminant transport by adding an adsorbing term. A parameter estimation method and its corresponding FORTRAN based program named FADEMain were developed on the basis of Nonlinear Least Square Algorithm and the analytical solution for one-dimensional FADE under the conditions of step input and steady state flow. Data sets of adsorbing contaminants Cd and NH4+-N transport in short homogeneous soil columns and conservative solute NaCI transport in a long homogeneous soil column, respectively were used to estimate the transport parameters both by FADEMain and the advection-dispersion equation (ADE) based program CXTFIT2.1. Results indicated that the concentration simulated by FADE agreed well with the measured data. Compared to the ADE model, FADE can provide better simulation for the concentration in the initial lower concentration part and the late higher concentration part of the breakthrough curves for both adsorbing contaminants. The dispersion coefficients for ADE were from 0.13 to 7.06 cm2/min, while the dispersion coefficients for FADE ranged from 0.119 to 3.05 cm1.856/min for NaCI transport in the long homogeneous soil column. We found that the dispersion coefficient of FADE increased with the transport distance, and the relationship between them can be quantified with an exponential function. Less scale-dependent was also found for the dispersion coefficient of FADE with respect to ADE. | HUANG Guanhua, HUANG Quanzhong, ZHAN Hongbin , CHEN Jing, XIONG Yunwu & FENG Shaoyuan College of Hydraulic and Civil Engineering, China Agricultural University, Beijing 100083, China Chinese-Israeli International Center for Research and Training in Agriculture, Beijing 100083, China Department of Geology and Geophysics, Texas A& M University, TZ77843-3115, USA | 2005 | Science China Earth Sciences2005，48，z2： | 3 |
| 10 | The Synthesis of a New Macrocyclic Dinucleating Ligand,3,6,9,17,20,23-Hexaaza-29,30-Dihydroxy-13,27-Dimethyl-Tricyclo[23,3,1,1^(11,15)]Triaconta-1(28),11,13, 15(30),25,26-Hexaene显示文摘A new dinucleating 24-membered hexaazadiphenol macrocyclic ligand, 3,6,9,17,20, 23-hexaaza-29,30- dihydroxy-13,27-dimethyl-tricycl [23, 3, 1, 1 11,15] triaconta -1(28), 11,13,15(30),25, 26-hexaene, BDBPH, was synthesized by the NaBH4 reduction of the Schiff-base obtained from the [2+2] condensation between diethylenetriamine and diformyl -p-cresol. The structure was characterized by elemental analysis, 1HNMR and FAB-MS. The synthetic method was also discussed. | Guo Qiang SHANGGUAN Arthur E. MARTELL Zhong Ren ZHANG (Department of Chemistry, Jining Medical College, Jining 272013Department of Chemistry, Texas A&M University, College Station, Texas 77842 USA) | 2000 | Chinese Chemical Letters2000，11，7： | 2 |
| 11 | Assessment of the modulated gradient model in decaying isotropic turbulence显示文摘A recently introduced nonlinear model undergoes evaluations based on two isotropic turbulent cases:a University of Wiscosion-Madison case at a moderate Reynolds number and a Johns Hopkins University case at a high Reynolds number.The model uses an estimation of the subgrid-scale(SGS) kinetic energy to model the magnitude of the SGS stress tensor,and uses the normalized velocity gradient tensor to model the structure of the SGS stress tensor.Testing is performed for the first case through a comparison between direct numerical simulation(DNS) results and large eddy simulation(LES) results regarding resolved kinetic energy and energy spectrum.In the second case,we examine the resolved kinetic energy,the energy spectrum,as well as other key statistics including the probability density functions of velocities and velocity gradients,the skewness factors,and the flatness factors.Simulations using the model are numerically stable,and results are satisfactorily compared with DNS results and consistent with statistical theories of turbulence. | Hao Lu a) Saint Anthony Falls Laboratory,Department of Civil Engineering,University of Minnesota-Twin Cities,2 3rd Ave.SE,Minneapolis,MN 55414,USA | 2011 | Theoretical & Applied Mechanics Letters2011，1，4： | 2 |
| 12 | Enhancement of bone healing based on ex vivo gene therapy using human muscle-derived cells expressing bone morphogenetic protein 2显示文摘 | Lee JY Peng H Usas A | 2002 | Hum Ther2002，13，： | 1 |
| 13 | Bone regeneration mediated by BMP4-expressing muscle-derived stem cells is affected by delivery system显示文摘 | Usas A Ho AM Cooper GM | 2009 | Tissue Eng Part A2009，15，2： | 1 |
| 14 | Synergistic enhancement of bone formation and healing by stem cell-expressed VEGF and bone morphogenetic protein-4 显示文摘 | Peng H Wright V Usas A | 2002 | J Clin invest2002，110，6： | 1 |
| 15 | Enhancement of bone healing based on ex vivo gene therapy using human muscle-derived cells expressing bone morphogenetic protein 2显示文摘 | Lee JY Peng H Usas A | 2002 | Hum Gene Ther2002，13，： | 1 |
| 16 | Platelet-rich plasma promotes the proliferation of human muscle derived progenitor cells and maintains their stemness显示文摘 | Li H Usas A Poddar M | 2013 | PLoS One2013，8，64： | 1 |
| 17 | Synergistic enhancement of bone formation and healing by cell-expressde VEGF and bone morphogenetic-4显示文摘 | Peng H Wright V Usas A | 2002 | J Clin Invest2002，110，6： | 1 |
| 18 | VEGF improves, whereas sFltl inhibits, BMP2-induced bone formation and bone healing through mo-dulation of angiogenesis 显示文摘 | Peng H Usas A Olshanski A | 2005 | J Bone Miner Res2005，20，11： | 1 |
| 19 | Ex - vivo gene therapy with BMP24 for critically sized defects and enhancement of fracture healing in an osteoporotic animal model 显示文摘 | Rose T Peng H Usas A | 2005 | Unfallchirurg2005，108，1： | 1 |
| 20 | Skeletal muscle- derived stem cells: implications for cell-mediated therapies 显示文摘 | Usas A Ma iulaitis J Ma iulaitis R | 2011 | Medicina (Kaunas)2011，47，9： | 1 |
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