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| 1 | Value of ecosystem services in China显示文摘The function and services are the important components of the life-support system in theplanet, as well as the basic elements for sustainable development of environment and society. It is a must to evaluate it for incorporating it with the social-economic system. It is also an important approach to draw the public attention on the environmental and ecosystem conservation. In this study, the ecosystem function and services in China were estimated by employing the classification and economic parameters from Costanza et al. The type and area of terrestrial ecosystems were extracted from Vegetation Map of China (1:4 000 000), and then the distribution map of ecosystem services of China was drawn. According to our calculation, the total value of ecosystem services in China is 77 834.48×108 RMB yuan per annum. The value for terrestrial ecosystem is 56 098.46×108 yuan per annum, and that for marine ecosystem is 21 736.02×108 yuan per annum. The value of ecosystem services in China is 1.73 times bigger | CHEN Zhongxin & ZHANG XinshiLaboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Current address: Institute of Natural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | 2000 | Chinese Science Bulletin2000，45，10： | 128 |
| 2 | STRUCTURES OF SYSTEMS WITH EXPONENTIAL LIFE DISTRIBUTIONS显示文摘Abstract. Structures of monotone systems and cold standby systems | CAI JUN WU YANHONG Department of Mathematics, Teacher’s College of Yanzhou University Yangzhou 225002 Current address: Department of Mathematics and Statistics, Concordia University, Montreal, Quebec, Canada. Department of Mathematical Sciences,University of Alberta, Edmonton, Alberta, T6G 2G1, Canada. | 1996 | Applied Mathematics(A Journal of Chinese Universities)1996，11，1： | 3 |
| 3 | Magnetic resonance imaging of hepatocellular carcinoma induced by diethylnitrosamine in Sprague-Dawley rats显示文摘Diethylnitrosamine (DENA) is able to induce various benign and malignant liver lesions in rats with a high success rate and a low mortality rate. It provides a more appropriate model that better simulates the various lesions occurring in humans than the usual model of tumor implantations. The aim of the present study was to evaluate MRI liver examination in Sprague-Dawley(SD) rats as a routine method to detect hepatocellular carcinoma (HCC) nodules induced by DENA and to follow up their growth. METHODS:Hepatic carcinogenesis was induced in 80 male SD rats using oral DENA solution. All animals were imaged for liver tumor detection with a 1.5 Tesla magnet (Siemens Sonata,Erlangen, Germany) using correspondence scan parameters and a radio-frequency knee coil. Macroscopic examinations were performed along the axial MRI sections to evaluate magnetic resonance imaging (MRI) findings, and histopathological assessment was also performed. RESULTS:No false negative results were obtained on MR images. Hepatic tumors in 72 rats were confirmed macro-scopically and 68 rats were detected by MRI till the 20th week. The smallest and the largest nodules detected by MRI were 2 mm and 37 mm in diameter respectively. The agreement rate of MRI with macroscopic observation was 39. 1% and 97. 4% respectively for 2 mm to 5 mm and more than 5 mm nodules. CONCLUSIONS:The hepatic tumor induced by DENA provides a more representative range of tumors for imaging diagnosis and interventional treatment. MRI is the best approach for scrutinizing pathological changes of rat livers in the period of observation. | Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China (Li X, Zhou XP and Guan YS) Department of Radiology, Ruijin Hospieal. Shanghai Second Medical University, Shanghai 200025 , China. Current address:Astra Zeneca R & D Alderley, Macclesfield SK 10 4 TG U. K. (Wang YX) | 2005 | Hepatobiliary & Pancreatic Diseases International2005，4，3： | 3 |
| 4 | ANTIPLANE SHEAR FIELDS NEAR A CRACK-TIP IN A BRITTLE DAMAGED MATERIAL显示文摘In this paper,a simplified brittle damage model is proposed according to theMazars-Lemaitre damage model for concrete.A closed-form solution for a mode Ⅲ crack is obtainedbased on the simplified model under small scale damage conditions,which allows for discontinuities ofdisplacement-gradient and tangential stress on the damage boundary.It is pointed out that thediscontinuities of field variables near the tip region exist for the brittle damaged material induced by thesoftening effect of the material. | Jin Zhihe Yu Shouwen Hwang Kehchih(Department of Engineering Mechanics,Tsinghua University) The current address:Institute of Engineering Mechanics,Northern Jiaotong University,Beijng. | 1989 | Acta Mechanica Sinica1989，5，3： | 2 |
| 5 | Application of facility location modeling constructs to vendor selection problems显示文摘 | John Current Charles Weber | 1994 | European Journal of Operational Research1994，76，： | 1 |
| 6 | Vendor Selection Criteria and Methods显示文摘 | Weber C A Current J R Benton W C | 1991 | European Journal of Operational Research1991，50，： | 1 |
| 7 | A mul- tiobjective modeling approach to locating incinerators 显示文摘 | Alada - Almeida L Coutinho - Rodrigues J Current J | 2009 | Socio -Economic Planning Sciences2009，，2： | 1 |
| 8 | An improved solution algorithm for the constrained shortest path prob- lem显示文摘 | Luis Santos Joao Coutinho-Rodrigues John R Current C | 2007 | Transportation Research Part B2007，41，： | 1 |
| 9 | The multiple depot vehicle routing problem with backhauling显示文摘 | Min H Current J Schilling D | 1992 | Journal of Business Logistics1992，13，： | 1 |
| 10 | Com- parative evaluation of E99 Tcm tilmanocept for sen- tinel lymph node mapping in breast cancer pa- tients: results of two phase 3 trials显示文摘 | Hoh Jeanette :ndez of the Sentinel Lymph Current Clinical Oncol- Wallace AM Han LK Povoski SP | 2013 | Ann Surg Oncol2013，20，8： | 1 |
| 11 | Vendor Selection Criteria and Methods显示文摘 | CURRENT J R BENTON W C | 1991 | European Journal of Operational Research1991，50，： | 1 |
| 12 | A multiobjective approach to vendor selection显示文摘 | Weber C A Current J R | 1993 | European Journal of Operational Research1993，68，2： | 1 |
| 13 | The minimum-covering shortest-path problem显示文摘 | Current JR | 1988 | Decision Science1988，19，： | 1 |
| 14 | Vendor Selection Criteria and Methods 显示文摘 | Weber C A Current J R Benton W C | 1991 | European Journal of Operational Research1991，，50： | 1 |
| 15 | CMOS current comparator circuit显示文摘 | Freitas D A Current K W | 1983 | Electronic letters1983，19，17： | 1 |
| 16 | The hub location and network design problem with fixed and variable arc costs: Formulation and dual-based solution heuristic 显示文摘 | Yoon M G Current J | 2008 | Journal of the Operational Research Society2008，59，1： | 1 |
| 17 | Endoscopy显示文摘 | Gay G Delvaux M Rey J E The role of video capsule endoscopy in the diagnosis of digestive diseases: a review of current possibilities | 2004 | Endoscopy2004，36，4： | 1 |
| 18 | An efficient tabu search procedure for the p-Median problem显示文摘 | Rolland E Schilling D A Current J R | 1997 | European Journal of Operational Research1997，96，2： | 1 |
| 19 | Application of facility location model- ing constructs to vendor selection problems 显示文摘 | Current J Weber C | 1994 | European Journal of Operations Research1994，76，3： | 1 |
| 20 | A CMOS voltage eomparator with rail to rail input range显示文摘 | CHU W S CURRENT K W | 1999 | Analog Integrated Circuits and Signal Processing1999，19，2： | 1 |
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