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中国综合养鱼发展的历史回顾与发展趋势研究 总被引：2，自引：1，他引：1
摘要：较为系统地回顾了我国综合养鱼发展的历史,分析了我国综合养鱼发展中存在的主要问题,对新形势下我国综合养鱼业发展的方向进行了初步探讨,提出加强低碳经济的理念在综合养鱼生态渔业系统中的基础及应用的研究、用循环经济的思想指导综合养鱼的可持续性发展、加强综合养鱼技术推广及人才培养、走综合养鱼产业化经营之路,降低养殖风险,提高效益。 相似文献
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Due to their enhanced cost-effectiveness and efficiency over traditional borehole exchangers, energy piles are increasingly used in Ground Sourced Heat Pump (GSHP) projects. In this paper, the structural characteristics of these two types of heat exchangers and their heat transfer mechanism were discussed firstly. The thermal response tests (TRT) were performed on two testing energy piles in one GSHP project in Nanjing, China. The TRT results were then used to verify the numerical simulations, which suggests that the heat exchange performance of energy piles is superior to that of the traditional borehole exchangers. Meanwhile, the numerical simulation method used in this paper was considered applicable to the optimization design of ground heat exchangers in GSHP system. 相似文献
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浅析节水型社会建设思路 总被引：3，自引：0，他引：3
我国水资源面临危机,通过对我国水资源现状、特点及存在问题的分析,指出了实现水资源可持续利用的出路是建立节水型社会。并从制度、经济、科技、文化及具体措施几个方面分析了建设节水型社会的基本思路。 相似文献
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本研究旨在为中国油棕产业的持续健康发展提供一些有益的启示。首先阐述了开展油棕有害生物综合防治与生态安全问题研究在中国油棕产业发展中的意义,然后对国内外油棕病虫鼠害发生情况做了概述,重点阐述了有害生物综合防治的原则及监测预警系统的构建,最后提出了油棕产业中有害生物综合治理的5项措施。 相似文献
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我国有机茶产业发展初探 总被引：2，自引：1，他引：1
有机茶在我国经历了20年的发展历程,是我国有机农业和茶叶产业的重要组成部分。本文在评估了我国有机茶产业发展的优势、已取得的业绩的基础上,从区域、市场、管理体系、关键技术和认证等角度分析了当前有机茶发展存在的问题,提出我国有机茶产业可持续发展的建议和对策。 相似文献
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四川省城市土地利用效率与经济耦合协调度研究 总被引：8，自引：2，他引：6
解决城市用地供需矛盾的关键是提高土地利用效率。为了测度城市经济与土地利用效率之间的协调程度,通过建立综合评价指标体系,利用因子分析法,对城市经济与土地利用效率进行综合评价,然后借鉴物理学中的耦合度函数,测算地级城市经济与城市土地利用效率之间的耦合协调程度。分别得到四川省18个城市1998至2008年的协调度,同时对不同地级城市、不同年份的计算结果作横向和纵向的比较,动态地分析与考察,结果表明四川省地级城市经济与城市土地利用效率的协调程度虽然逐步提高,但是总体上水平不高,只有发展经济与提高土地利用效率并举,才能改进协调度,从而为政府实施城市经济发展的可持续土地利用战略提供决策依据。 相似文献
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Annual Energy Consumption and Feasibility Assessment of Ground -Source Heat Pump in Residential Building in Fuzhou City 
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下载免费PDF全文 This paper describes the annual energy consumption and economic assessment of air-source heat pump(ASHP) and ground-source heat pump(GSHP),based on hourly building load of typical house in Fuzhou.Analysis results show that the energy consumption of GSHP is 15% less than that of ASHP through all year,where there is 13% less in summer and 20% less in winter.Although the seasonal energy efficiency ratio of GSHP in Fuzhou is higher than that of ASHP,it has no obvious effect on the energy efficiency as it is in the hot summer and cold winter zone.In comparison with ASHP,the GSHP is not cost-effective. 相似文献
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In China, the county development is very important in promoting the national economy, coordinating the relationship between the city and rural area and achieving sustainable development of the country. The norm of county planning is a document directing the development of the total county area. Therefore, based on the theory of man-land system, this paper discusses the key in drawing up a county planning, such as regulating the economic structure, arranging the town system and protecting the eco-system. Finally, a draft norm of county planning was put forward. 相似文献
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西部农村人力资源开发具有重要的理论和现实意义。针对目前存在的受教育程度低,就业能力差等问题,充分发挥政府的作用,以职业教育为中心,积极推进农科教结合,建立和完善农村社会保障体系,采取有效的激励措施,提高我国西部农村人力资源的质量,促进西部经济与社会的可持续发展。 相似文献
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夏季低温冷害是中国低温灾害的主要类型之一,尤其在东北地区发生比较频繁,造成影响相当严重,基于此,笔者旨在为玉米低温冷害设计一个基于网络的远程诊断与管理的系统平台。通过对基于web的远程诊断管理系统关键技术的分析,在总结东北地区玉米低温冷害领域专家经验和知识的基础上,初步实现了一个基于web技术的玉米低温冷害远程诊断与管理系统。该系统采用J2EE技术规范和Java语言进行开发,并且与无线远程监测系统相结合,使之具有实时管理功能。用户可以通过访问该系统,实现玉米低温冷害主动和被动防御、低温冷害实时监控管理、专家知识浏览和系统维护等功能。该系统具有可靠性、易维护、易操作和普适性等性能,并可通过重建知识库和数据库,为更多种类作物气象灾害提供远程诊断及管理服务。 相似文献
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《Journal of Landscape Research》2016,(4)
On the basis of current development of urban rail transit complex in China,this paper proposed that it is necessary to build a complete landscape design system of urban traffic complex.Combined with the concept of sustainable urban landscape design,this paper explored landscape design of urban rail transit complex from the macroscopic,mesocopic and microscopic perspective,and analyzed many design cases to provide references for the sustainable landscape design of urban rail transit complex in China. 相似文献
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苏南乡村旅游开发模式研究及有效途径 总被引：5，自引：3，他引：2
随着产业升级和市场需求,苏南地区乡村旅游得到长足的发展。不少乡村以其丰富多样的乡村文化景观和原生态的自然景观深受欢迎,成为理想的投资场所和城市居民休闲娱乐的旅游目的地。分析现有的开发模式,研究存在的问题,可以为苏南地区乡村旅游的可持续发展提供一定建议。 相似文献
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For the benefit of environment protection and sustainable economic development especially in western china, to build more hydroelectric power stations is a basic policy of our government. Xiluodu project is the biggest underground hydroelectric power station. which includes 18 power generation units with a capacity more than 12 600 MW. By establish a set of heat and humidity balance equations applying on the Xiluodu project underground workshop with its boundary conditions, this paper has present an one_dimensional heat conduction model to simulate its dynamical heat transfer process. On the purpose of compare deferent design schemes of HVAC system, a package of software for numerical simulation is developed. In this paper,we have also recommend some criteria for the evaluation of HVAC system design schemes. The computation result has show that if utilizing the reservoir water and AC chiller to process the air,combing other anti_humidification technical measures,it will assure the anticipated air quality of underground facilities. 相似文献
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The air conditioning system using a ground source heat pump(GSHP) combined with a radiant floor integrates the advantages of both types,giving such a system large potential for popularization.After experimenting with one house's hybrid system,the design processes and construction methods for such a system can be summarized.In the experiment,different terminal devices were used to adopt varying winter and summer climatic conditions.It is suggested that the constructors should make good use of resources and waste water during the construction phase.The experimental results show that this hybrid system runs steadily and it supports a better temperature field to meet the requirement for the human comfort.Finally,a hybrid system managment strategy is suggested. 相似文献
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稻田综合种养结合模式及生态效应 总被引：6，自引：3，他引：3
常规稻作生产以大量化肥、农药投入为主要手段,虽然确保了水稻稳产高产,满足了人们的温饱需求,但给稻田生态安全、环境健康和农产品食用品质带来一定的污染,从而影响了农业可持续发展。近年来,为了改善农业生态环境、实施绿色发展,减轻常规稻作对环境的影响,确保稻米食用安全,特别是随着经济持续增长和社会生活水平的不断提高,人们越来越重视安全性高、无污染的农产品生产和消费,我国适时提出和实施减肥减药和绿色优质农产品供给的重大举措,深受全社会的肯定。稻田种养作为一项可持续发展的生态循环农业模式,具有明显的减肥减药、稳产增效、资源节约、环境友好的综合效应,是实现农业绿色发展、乡村振兴和精准扶贫的重要途径,也是促进农业现代化的重要措施。笔者概述了稻田种养的生态原理和生态功能,指出了目前我国稻田种养发展过程中存在的实际问题和解决路径,以期为我国稻田综合种养的健康发展和现代化农业进程的加速发展提供参考。 相似文献
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Social Network Analysis of Actors in Rural Development: A Case Study of Yanhe Village,Hubei Province,China 下载免费PDF全文
下载免费PDF全文 Agricultural production, rural areas, and farmers are three key aspects of agriculture related to sustainable economic and social development in China. Rural development is a process of multi‐participation, which involves actors from governments, village committees, villagers, rural economic cooperatives, enterprises, financing institutions, and non‐government organizations (NGOs). Based on social network analysis (SNA), this article analyzes the social network structures and characteristics of various actors in different stages of rural development in Yanhe village, Hubei Province, China. The results show that both the village committee and villagers have great influence on rural development; NGOs are the leaders of rural environmental improvement; village cooperatives are the promoters of rural economic development; enterprises are the accelerators of rural construction and development. The study outlines the rural development model in Yanhe village where the village committee is the leader and multiple forms of participation and cooperation are present; there are excellent partnerships and communication mechanisms among the participants. The endogenous and sustainable development model identified from Yanhe village is valuable for other villages in China to adopt. 相似文献
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The sustainability assessment of construction project will play an important role in promoting the implementation of sustainable development strategy. The indicator system and standards for sustainability assessment of construction project are discussed in this paper, and then the application mode of sustainability assessment in China is analyzed. A proposal is also put forward in this paper that the sustainability assessment of construction project should be implemented in stages and combined with the feasibility study and environmental impact assessment system. 相似文献
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密云库北区域典型村庄生态经济评估与规划设计 总被引：2，自引：1，他引：1
密云水库位于北京市密云县北部山区,由于干旱少雨,其来水量由20世纪50年代平均来水量17亿m3下降到近十年的0.7亿m3,水库水质的变化与水库近区域,尤其是密云水库一级保护区的经济行为关系更为密切。本文以密云水库一级保护区典型村庄为案例,对其产业选择及产业发展进行了剖析,并对生态经济状况进行能值评估,结果表明,该村净能值产出率＜1,全村生态经济运行可行性不强,能值投资率（5.67）高于中国农业能值投资率的平均值（4.93）,该村对经济资源投入的依赖性较大,同时,环境负荷率为5.67,对环境造成了一定压力,可持续指数（1.13）偏低,全村属于资源密集型的经济开发系统。在能值评估的基础上,提出了以旅游循环农业为核心的生态设计方案,为水源保护区生态经济的协调发展提供了科学依据。 相似文献