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浅析自学考试向农村的延伸
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作者 郭华 《中国成人教育》 北大核心 2000年第8期64-64,共1页
关键词 农村 高等教育自学考试 生源开发 助学辅导网络 管理工作 专业设置
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Characteristics and Measurements of Ecological Compensation in Ecosystem 被引量:33
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作者 王让会 张慧芝 《Agricultural Science & Technology》 CAS 2008年第6期10-13,共4页
This research was to introduce the characteristics of and countermeasures for ecological compensation. From the analysis of the current situation of ecological compensation, a series of characteristics of ecological c... This research was to introduce the characteristics of and countermeasures for ecological compensation. From the analysis of the current situation of ecological compensation, a series of characteristics of ecological compensation in resource exploitation and economic development were elaborated. The principles and practical issues are complex in ecological compensation, and the corresponding object, entity, financial system of ecological compensation are the keys to set up compensation mechanism, and studying of ecosystem service function and ecological footprint calculation are important ways to quantitatively assess ecological compensation, and are also important foundations for establishing calculation system of green GDP. Advocating the benefit compensation mechanism of ecological economy and enclosing ecological compensation principle are important ways for establishing the new environmental management pattern and manifesting social justice and the ecological civilization ideas. This research proposed some views of and approaches to ecological compensation mechanism for constructing natural resource development and utilization.The establishment of ecological compensation is an important approach to prevent the imbalance of resource allocation, the system guarantee for sustainable development, and the important basis of saving resources. 展开更多
关键词 Ecological compensation ECOSYSTEM Ecological footprint Resource exploitation Environmental protection
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Forestland prediction of China based on forest ecosystem services for the first half of 21st century
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作者 董仁才 陈春娣 +1 位作者 邓红兵 赵景柱 《Journal of Forestry Research》 SCIE CAS CSCD 2008年第3期181-186,共6页
A new model was developed to predict forestland demand of China during the years of 2010-2050 in terms of the concept of forest ecosystem services. On the basis of the relationship between forest ecosystem services an... A new model was developed to predict forestland demand of China during the years of 2010-2050 in terms of the concept of forest ecosystem services. On the basis of the relationship between forest ecosystem services and classified forest management, we hypothesized that the ecological-forest provides ecological services, whereas commercial-forest supplies wood and timber production, and the influences of the growth of population, social-economic development target, forest management methods and the technology changes on forest resources were also taken into account. The prediction reveals that the demand of total forestland of China will be 244.8, 261.2 and 362.2 million ha by the year 2010, 2020 and 2050, respectively. The results demonstrated that China will be confronted with a shortage of forest resources, especially with lack of ecological-oriented forests, in the future. It is suggested that sustainable management of forest resources must be reinforced and more attention should be drown no enhancing the service function of forest ecosystem. 展开更多
关键词 forest resources forest ecosystem services forestland prediction commercial forest ecological forest timber demand ecological demand
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Marine Renewable Energy Seascape 被引量:14
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作者 Alistair G.L.Borthwick 《Engineering》 SCIE EI 2016年第1期69-78,共10页
Energy production based on fossil fuel reserves is largely responsible for carbon emissions, and hence global warming. The planet needs concerted action to reduce fossil fuel usage and to implement carbon mitigation m... Energy production based on fossil fuel reserves is largely responsible for carbon emissions, and hence global warming. The planet needs concerted action to reduce fossil fuel usage and to implement carbon mitigation measures. Ocean energy has huge potential, but there are major interdisciplinary problems to be overcome regarding technology, cost reduction, investment, environmental impact, governance, and so forth. This article briefly reviews ocean energy production from offshore wind, tidal stream, ocean current, tidal range, wave, thermal, salinity gradients, and biomass sources. Future areas of research and development are outlined that could make exploitation of the marine renewable energy (MRE) seascape a viable proposition; these areas include energy storage, advanced materials, robotics, and informatics. The article concludes with a sustainability perspective on the MRE seascape encompassing ethics, leg- islation, the regulatory environment, governance and consenting, economic, social, and environmental constraints. A new generation of engineers is needed with the ingenuity and spirit of adventure to meet the global challenge posed by MRE. 展开更多
关键词 Marine renewable energy Offshore wind Tidal stream Ocean current Tidal range Wave energy Ocean thermal energyBioenergySustainability
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Research Progress of Wild Soybean Germplasms and Utilization 被引量:7
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作者 陈小芳 宁凯 +2 位作者 徐化凌 于德花 毕云霞 《Agricultural Science & Technology》 CAS 2017年第5期812-817,共6页
Wild soybean (Glycine soja) is the wild relative species of cultivated soy- bean, which is of high protein content, strong tolerance and high propagation coeffi- cient. The diverse growing conditions of wild soybean... Wild soybean (Glycine soja) is the wild relative species of cultivated soy- bean, which is of high protein content, strong tolerance and high propagation coeffi- cient. The diverse growing conditions of wild soybean in China contribute to numer- ous phenotypes of wild soybean, which also reflect the evolution process through long-term natural and artificial selection. The research progress of wild soybean germpfasms was summarized in resource status and innovative utilization in order to provide information for research of wild soybean germplasms. 展开更多
关键词 Wild soybean Germplasm resources EXPLOITATION UTILIZATION
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Progress of photovoltaic technology in China
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作者 Zhao Yuwen Wang Sicheng Zhao Ying 《Engineering Sciences》 EI 2009年第2期72-79,共8页
Chinese government has been devoting itself to the development of renewable energy sources. This paper describes the history, achievement and future trends of photovoltaie technology, and suggestions axe proposed for ... Chinese government has been devoting itself to the development of renewable energy sources. This paper describes the history, achievement and future trends of photovoltaie technology, and suggestions axe proposed for strengthening the research and development (R&D) ability of China. 展开更多
关键词 photovoltaic technology renewable energy crystalline silicon solar cell thin film solar cell new type solar cell
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Technologies of oxygen supply for life support during the development of mineral resources in high altitude areas 被引量:2
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作者 Liu Yingshu Jia Yanxiang +4 位作者 Wu Tianyi Deng Ling Yang Xiong Liu Wenhai Zhang Hui 《Engineering Sciences》 EI 2013年第2期68-75,共8页
In order to fulfill the needs of life-support oxygen supply during the development of plateau mineral resources,four oxygen supply patterns suitable for the plateau mine in specific environment were developed:tunnel f... In order to fulfill the needs of life-support oxygen supply during the development of plateau mineral resources,four oxygen supply patterns suitable for the plateau mine in specific environment were developed:tunnel face diffusive oxygen supply,tunnel oxygen-bar car,carried oxygen cylinder and portable oxygen generator. Through the study of safety oxygen supply experiments in low- pressure plateau areas,the mathematical relationship between maximum integration of secure oxygen volume and altitude has been achieved. Oxygen supply safety control should follow this relationship in plateau mines during the time of executing tunnel face or in room air diffusive oxygen supply. The application results of life-support oxygen supplement technologies in the development of mineral resources in high altitude areas show that the oxygen supply for tunneling miners in plateau mines can not only effectively enhance the oxygen saturation,reduce the pulse rate and the breath rate per minute,but also improve various symptoms caused by altitude hypoxia and high-intensity physical labor. 展开更多
关键词 high altitude areas mineral exploitation life support oxygen supply
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A Study of Resource Curse Effect of Chinese Provinces Based on Human Developing Index 被引量:1
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作者 HUANG Yue FANG Yangang +1 位作者 ZHANG Ye LIU Jisheng 《Chinese Geographical Science》 SCIE CSCD 2014年第6期732-739,共8页
Traditional opinion considers that natural resources play an important positive role in economic development, while resource curse theory holds that natural resources usually obstruct economic increase. This debate ne... Traditional opinion considers that natural resources play an important positive role in economic development, while resource curse theory holds that natural resources usually obstruct economic increase. This debate needs further exploration. In most of empirical studies on resource curse theory, the economic development of an area is mainly evaluated by the Gross Domestic Product(GDP), however, the social and cultural contents of economic development are seldom considered. Thus, the Human Developing Index(HDI) was chosen to describe the comprehensive developing situation of an area in our study. Based on the panel data from the year of 2000 to 2011, the relationship between Human Developing Index and resource exploitation degree(RED) of 30 provinces in China(Tibet, Taiwan, Hong Kong and Macao were not included because of the restriction of data acquisition) was investigated by correlation coefficient analysis and regression analysis. We found that resource curse did exist over the entire country and its effect on 30 provinces were not exactly the same. According to the effects of resource curse, these provinces could be classified into four types: no resource curse provinces, slight resource curse provinces, severe resource curse provinces, and extreme resource curse provinces. Testing from two short time periods 2000–2005, and 2006–2011, the resource curse effect was not prominent. However, testing from the entire period of 2000–2011, the effect was obvious among each province. 展开更多
关键词 natural resources Human Developing Index (HDI) resource curse resource exploitation degree (RED) panel data
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Analysis of Integration Mode of Human Resources Development and Cultural Ecology in Hebei Province
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作者 Li Peihong Zhang Shiqi 《Chinese Journal of Population,Resources and Environment》 2012年第3期121-124,共4页
People and culture coexist and human resources development and regional cultural ecology integrate.The present thesis for the first time puts forward the integration mode of human resources development and cultural ec... People and culture coexist and human resources development and regional cultural ecology integrate.The present thesis for the first time puts forward the integration mode of human resources development and cultural ecology,argues that personnel innovation should be attracted by motive injection,open culture,resources integration,culture dilution,thinking blending and people-orientation and discusses the transmission mechanism for functions of integration mode of human resources development and cultural ecology from the aspects of cultural values,living styles and cultural industry. 展开更多
关键词 human resource develop (HRD) cultural-ecologicalintegration MODE Hebei Province
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Methodology for Selecting the Best Model for Forecasts: The Case Study of Forest Bioenergy
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作者 Michael N. Tsatiris 《Journal of Environmental Science and Engineering(A)》 2015年第5期266-272,共7页
The aim of this paper is the analysis of methodology for selecting the best model for forecasting of fuelwood demand in Greece for the years 2020, 2025 and 2030 with a final objective the decision-making in the sector... The aim of this paper is the analysis of methodology for selecting the best model for forecasting of fuelwood demand in Greece for the years 2020, 2025 and 2030 with a final objective the decision-making in the sector of forest bioenergy. A complete time series of historical data exists that concerns: (a) the consumption of fuelwood and (b) the six most important from the independent variables that could influence the consumption of fuelwood, whose data cover the time period 1989-2010. The evaluation and choice of the best model was realized with the help of the following six statistical criteria: (a) the size of standard error of theoretical values of dependant variable, S. E.; (b) the value of adjusted R square (R2); (c) the non-existence of autocorrelation among the residuals (ei) through the criterion Durbin-Watson; (d) the statistical significance of models coefficients through t criterion; (e) the statistical significance of models through F criterion and (f) the non-existence of multicolinearity through the values of Variance Inflation Factor. 展开更多
关键词 Evaluation of models choice of the best model statistical criteria.
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Biological Status of Indus River Dolphin (Platanista Minor Owen) in Indus River, Northern Pakistan
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作者 Farzana Perveen Sardar Azher Mehmood Shabbir Ahmed Zia Ur Reman 《Journal of Life Sciences》 2011年第1期39-47,共9页
A study was aimed to determine the biological status of the Indus river dolphin, Platanista minor Owen in Indus river with respect to distribution, threats and protection throughout its range in Northern Pakistan. For... A study was aimed to determine the biological status of the Indus river dolphin, Platanista minor Owen in Indus river with respect to distribution, threats and protection throughout its range in Northern Pakistan. For this purpose, a survey was conducted in an area of 103.5 km including the Indus river and its tributaries in March 2009 for estimating its distribution and population size using both direct observations of the dolphin as well as indirect evidences from its signs. The best group size was estimated with an abundance of 54 dolphins. Approximately 53.7% (1.07 dolphin&m) of the dolphin-population occurred in 27 km from Miran onward to Ramak, however, 38.9% (0.46 dolphin/km) occurred in 46 km from Dera Ismail (D.I.) Khan bridge to Miran, moreover, 7.4% (0.13 dolphin/kin) occurred in 30.5 km from Saggu, near Meetapur-village to D.I. Khan bridge in the Indus river. The highest density was found between Miran and Ramk. A pronounced increase in dolphin encounter rate and abundance were observed in a downstream-direction. Threats to dolphins include too much vessel-traffic, disturbance by the crane, duck-hunters, and no effective-protection. Dolphins are particularly vulnerable to the high levels of anthropogenic activities because of their restricted habitat. Threats vary geographically in their importance, but generally include accidental killing during fishing-operations, habitat-loss and population-fragmentation from water development. Deliberate killing for dolphin products also threatens the dolphins. Potential for protections and possibilities for dolphin eco-tourism measures must be taken. 展开更多
关键词 DOLPHIN endangered or critically endangered Indus river Northern Pakistan protection population.
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Energy Crisis in Nigerian University System: Implications of Self Auto-generation for Human Capital Development
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作者 Stephen Chijioke Nwanya 《Journal of Energy and Power Engineering》 2014年第12期2017-2026,共10页
Energy requirements for tertiary educational purpose is burgeoning, a reflection of its criticality to human asset formation and to use self auto-generation by petrol or diesel generators as the energy supply source i... Energy requirements for tertiary educational purpose is burgeoning, a reflection of its criticality to human asset formation and to use self auto-generation by petrol or diesel generators as the energy supply source is an unsustainable practice. The situation is worrisome in view of the noise pollution and nuisance that constitutes to the learning environment. This paper, therefore, determines the quantity of self generated energy supply, its intensity, the associated CO2 emissions and their possible implications for human capital development. A survey of generating sets was conducted using the University of Nigeria Nsukka as a representative of Nigerian universities. A walk-through-approach was adopted in gathering data and two metrics-life cycle cost and cost of electricity from auto-generation were used to determine the economic implications of the self generation. The results show that self auto-generation contributed installed energy capacity of amount 19 MVA, 20 MVA, 34 MVA, 11 MVA and 22 MVA to run human capital development activities, respectively for academic sessions from July 2006 to November 2010. The study helps us understand that reforms in educational sector are not effective as long as energy insecurity is a dominant factor. 展开更多
关键词 Self-generation energy impact human asset university.
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Recruitment and selection of Human Resources --Alibaba business, for example
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作者 He Qiaomei 《International English Education Research》 2014年第8期17-19,共3页
Human resources is one of the important aspects of an enterprise survival and development.The competition of an enterprise is ultimately a competition of human resources. It is no exaggeration to say that human resour... Human resources is one of the important aspects of an enterprise survival and development.The competition of an enterprise is ultimately a competition of human resources. It is no exaggeration to say that human resources are the core strength of an enterprise survival and development. If there is no good human resources, then the business may be just a shell, no pillars and core development, then it can not go on long-term development. With the development of international, multinational companies continue to grow, the demand for human resources is placed in a prominent position. Human resources management including human resource planning, human resources recruitment and selection, training and development of human resources, human resources performance management, compensation of human resources, labor relations. This paper studies the recruitment and selection of human resources, and Alibaba, for example, described in detail the meaning of the recruitment and selection methods and the role in order to provide a theoretical reference for future research and business recruitment. 展开更多
关键词 human resources recruitment and selection
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Developing energy forecasting model using hybrid artificial intelligence method
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作者 Shahram Mollaiy-Berneti 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第8期3026-3032,共7页
An important problem in demand planning for energy consumption is developing an accurate energy forecasting model. In fact, it is not possible to allocate the energy resources in an optimal manner without having accur... An important problem in demand planning for energy consumption is developing an accurate energy forecasting model. In fact, it is not possible to allocate the energy resources in an optimal manner without having accurate demand value. A new energy forecasting model was proposed based on the back-propagation(BP) type neural network and imperialist competitive algorithm. The proposed method offers the advantage of local search ability of BP technique and global search ability of imperialist competitive algorithm. Two types of empirical data regarding the energy demand(gross domestic product(GDP), population, import, export and energy demand) in Turkey from 1979 to 2005 and electricity demand(population, GDP, total revenue from exporting industrial products and electricity consumption) in Thailand from 1986 to 2010 were investigated to demonstrate the applicability and merits of the present method. The performance of the proposed model is found to be better than that of conventional back-propagation neural network with low mean absolute error. 展开更多
关键词 energy demand artificial neural network back-propagation algorithm imperialist competitive algorithm
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Energy Internet Promotes the Reform and Development of Natural Gas Industry
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作者 Guo Jiaofeng 《China Oil & Gas》 CAS 2016年第2期30-35,共6页
Not only being abundant in resources, natural gas also helps power grids consume wind energy, solar energy and etc. The promotion of natu ral gas is an essential zoay to facilitate the development of nezo energy and c... Not only being abundant in resources, natural gas also helps power grids consume wind energy, solar energy and etc. The promotion of natu ral gas is an essential zoay to facilitate the development of nezo energy and complete the transition to an energy system where the renewable energy is dominant. The operation of energy Internet with a concept of equal, open, cooperative and sharing, and the optimization of a combined energy of gas, electricity, heating and cooling, could significantly improve the energy efficiency. Meanwhile, the development of energy lnternet technology will subvert the existing division of energy industry, and generate new commercial formats with features of highly openness. It will also subvert some existing market rules, change the governance methods, generate renovations in organizations, business models and government management methods, thus requires further revolution in energy industry. In order to promote the rapid and healthy development of "lnternet plus" natural gas industry, a series of policies and precautions are needed to be inhvduced and improved. 展开更多
关键词 Natural gas Energy internet Energy revolution DEVELOPMENT
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Towards Sustainable Cellulosic Bioenergy
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作者 Randall W. Gentry Gary S. Sayler 庄杰 《Journal of Resources and Ecology》 CSCD 2010年第2期117-122,共6页
生物质是一种丰富易得的清洁能源,具有大幅减少温室气体排放的潜力。与以玉米及其他谷物为原料的生物质能源生产技术相比,由于纤维生物能源生产消耗的化石能源较少(化石能源与碳的比值低)而备受关注。然而,生物燃料生产系统并非简单,受... 生物质是一种丰富易得的清洁能源,具有大幅减少温室气体排放的潜力。与以玉米及其他谷物为原料的生物质能源生产技术相比,由于纤维生物能源生产消耗的化石能源较少(化石能源与碳的比值低)而备受关注。然而,生物燃料生产系统并非简单,受到多种因素的影响,如能量供应、农村的经济发展水平、土地和生态系统的保护、温室气体减排的可能性以及社会培训等。本文简要综述生物质能源开发的经济与环境影响。根据区域气候和生态条件,不同地区具有各自的生物质种类或能源作物的优化组合。在不久的将来,生物质能源开发的生物技术所面临的挑战包括:生物质形成与细胞壁分解过程的认识与操控,生物质预处理技术,糖产量高的植物变种的选育,用于纤维素降解的酶和微生物的大规模筛选与选育等。除强调生物质能源开发的环境安全和公共健康的重要性之外,生物质能开发还需要解决生命周期评价(LCA)、可持续性的标准和指标的建立等问题。 展开更多
关键词 bioenergy development cellulosic bioenergy greenhouse emission energy security
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A New Critical Nitrogen Dilution Curve for Rice Nitrogen Status Diagnosis in Northeast China 被引量:12
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作者 HUANG Shanyu MIAO Yuxin +6 位作者 CAO Qiang YAO Yinkun ZHAO Guangming YU Weifeng SHEN Jianning YU Kang Georg BARETH 《Pedosphere》 SCIE CAS CSCD 2018年第5期814-822,共9页
In-season diagnosis of crop nitrogen(N) status is crucial for precision N management. Critical N(N_c) dilution curve and N nutrition index(NNI) have been proposed as effective methods to diagnose N status of different... In-season diagnosis of crop nitrogen(N) status is crucial for precision N management. Critical N(N_c) dilution curve and N nutrition index(NNI) have been proposed as effective methods to diagnose N status of different crops. The N_c dilution curves have been developed for indica rice in the tropical and temperate zones and japonica rice in the subtropical-temperate zone, but they have not been evaluated for short-season japonica rice in Northeast China. The objectives of this study were to evaluate the previously developed N_c dilution curves for rice in Northeast China and to develop a more suitable N_c dilution curve in this region. A total of17 N rate experiments were conducted in Sanjiang Plain, Heilongjiang Province in Northeast China from 2008 to 2013. The results indicated that none of the two previously developed N_c dilution curves was suitable to diagnose N status of the short-season japonica rice in Northeast China. A new N_c dilution curve was developed and can be described by the equation N_c = 27.7 W^(-0.34) if W ≥ 1 Mg dry matter(DM) ha^(-1) or N_c = 27.7 g kg^(-1) DM if W < 1 Mg DM ha^(-1), where W is the aboveground biomass. This new curve was lower than the previous curves. It was validated using a separate dataset, and it could discriminate non-N-limiting and N-limiting nutritional conditions. Additional studies are needed to further evaluate it for diagnosing N status of different rice cultivars in Northeast China and develop efficient non-destructive methods to estimate NNI for practical applications. 展开更多
关键词 japonica rice nitrogen nutrition index nitrogen use efficiency plant nitrogen concentration precision nitrogen mana-gement
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