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41.
Xie Qiu - sheng 《上海商学院学报》2003,(1)
当前高职学生的行为规范,与当代大学生应有的良好形象相比尚有较大差距。如不加大这方面的教育力度,不但会影响高职学生本人的前途,而且势必影响高职学校的发展。作者从高职院区党支部书记的视点出发,有针对性地提出了一系列改进高职学生思想政治工作的措施建议。 相似文献
42.
Medium-Term Hydro Generation Scheduling (MTHGS) with Chance Constrained Model (CCM) and Dynamic Control Model (DCM) 总被引:1,自引:0,他引:1
Jianzhong Zhou Mengfei Xie Zhongzhen He Hui Qin Liu Yuan 《Water Resources Management》2017,31(11):3543-3555
Medium-Term Hydro Generation Scheduling (MTHGS) plays an important role in the operation of hydropower systems. In the first place, this paper presents a Chance Constrained Model for solving the optimal MTHGS problem. The model recognizes the impact of inflow uncertainty and the constraints involving hydrologic parameters subjected to uncertainty are described as probabilistic statements. It aims at providing a more practical technique compared to the traditional deterministic approaches used for MTHGS. The stochastic inflow is expressed as a simple discrete-time Markov chain and Stochastic Dynamic Programming is adopted to solve the model. Then in order to use the information of long-term inflow forecast to improve dispatching decisions, a Dynamic Control Model is developed. Short-term forecast results of the current period and long-term forecast results of the remaining period are treated as inputs of the model. Finally, the two methods are applied to MTHGS of Xiluodu hydro plant in China. The results are compared to those obtained from Deterministic Dynamic Programming with hindsight and advantages and disadvantages of the two methods are analyzed. 相似文献
43.
深水钢板桩围堰施工新技术研究 总被引:1,自引:0,他引:1
本文结合某大桥深水基础施工技术,对传统钢板桩围堰施工工艺进行了改进,提出了先下内支撑后插打钢板桩的施工方法,工程实践表明,该方法在提高了工效的同时,可大大提高钢板桩插打的质量,围堰结构在施工过程中的受力状态与理论计算结果吻合度高,有利于施工质量及结构安全控制。 相似文献
44.
Mangrove forests as a nature-based solution for coastal flood protection: Biophysical and ecological considerations 下载免费PDF全文
Rosanna van Hespen Zhan Hu Bas Borsje Michela De Dominicis Daniel A. Friess Svetlana Jevrejeva Maarten G. Kleinhans Maria Maza Celine E. J. van Bijsterveldt Tom Van der Stocken Bregje van Wesenbeeck Danghan Xie Tjeerd J. Bouma 《水科学与水工程》2023,16(1):1-13
Nature-based coastal protection is increasingly recognised as a potentially sustainable and cost-effective solution to reduce coastal flood risk. It uses coastal ecosystems such as mangrove forests to create resilient designs for coastal flood protection. However, to use mangroves effectively as a nature-based measure for flood risk reduction, we must understand the biophysical processes that govern risk reduction capacity through mangrove ecosystem size and structure. In this perspective, we evaluate the current state of knowledge on local physical drivers and ecological processes that determine mangrove functioning as part of a nature-based flood defence. We show that the forest properties that comprise coastal flood protection are well-known, but models cannot yet pinpoint how spatial heterogeneity of the forest structure affects the capacity for wave or surge attenuation. Overall, there is relatively good understanding of the ecological processes that drive forest structure and size, but there is a lack of knowledge on how daily bed-level dynamics link to long-term biogeomorphic forest dynamics, and on the role of combined stressors influencing forest retreat. Integrating simulation models of forest structure under changing physical (e.g. due to sea-level change) and ecological drivers with hydrodynamic attenuation models will allow for better projections of long-term natural coastal protection. 相似文献
45.
He Xinxin Luo Jungang Li Peng Zuo Ganggang Xie Jiancang 《Water Resources Management》2020,34(2):865-884
Water Resources Management - Accurate and reliable monthly runoff forecasting is of great significance for water resource optimization and management. A neoteric hybrid model based on variational... 相似文献
46.
Li Runjie Du Jinkang Bian Guodong Wang Yuefeng Chen Changchun Zhang Xueliang Li Maohua Wang Shanshan Wu Senyao Xie Shunping Yang Long Xu Chong-Yu 《Water Resources Management》2020,34(13):3967-3984
Water Resources Management - The accurate simulation and prediction of flood response in urbanized basins remains a great challenge due to the spatial and temporal heterogeneities in land surface... 相似文献
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Zhong Saixiang Xie Mei'e Gu Shuzhong 《生态经济(英文版)》2007,3(2):132-148
This paper analyzes the existence of developmental views and compares the results of previous studies for underdeveloped regions.In view of the limitations of previous studies,this study details regional unit,expands index system,applies factor-analysis to structure index system,uses the fuzzy comprehensive evaluation model to improve analytic hierarchy process,and identifies the economic developmental levels of 384 regions,including 4 municipalities,333 cities at prefecture level,and 47 counties under the jurisdiction of province.The levels of the 47 counties are identified by dividing the rank of comprehensive values of more than 337 regions unit into five equal graduations and then matching the 47 counties with the five-graduation results.This study provides the distribution of resources-rich region in China qualitatively and quantitatively in terms of coal,oil gas and other 14 kinds of metal mineral resources.Finally,by matching the two parts of results,this study identifies the distribution of underdeveloped resource-rich regions (URRRs).URRRs are mainly distributed in Shaanxi,Shanxi,Guizhou,Yunnan,Sichuan,He 'nan,Shandong,Guangxi and Gansu provinces,which accounts for 78.57% of the total in China.To a certain degree,the result of this paper proves that "resources curse " existing in the national stratification plane in later 20^th century still takes places in some cities in China,especially in the counties of these cities 'jurisdiction. 相似文献
50.
文章从博弈论和技术经济学的角度对银行金融创新进行了分析,通过考察影响商业银行金融创新的主要因素,得出要推动我国金融产品创新,商业银行要根据自身的辅助资产和金融产品运营中的转换成本形成自己独特的金融创新策略,同时政府和中央银行要从法律和监管上创造良好的创新环境。 相似文献