湖南2005年农业旱灾及其抗旱效益的优势分析

通过对典型严重旱灾年的灾情分析,得出湖南2005年严重旱灾的一般特点。并且运用灰色系统理论对湖南农业旱灾抗旱效益进行了优势分析,结果为经济作物抗旱效益为准优系统特征数列,粮食抗旱效益为最劣系统特征数列;农作物受旱面积为准优相关因素数列,现有县级服务组织数量为最劣相关因素数列。     

资源枯竭型城市的出路

促进资源枯竭型城市产业转移，实现城市的可持续发展是我国经济发展和城市化进程中的重要问题。资源枯竭型城市的出路在于：立足自身特点，发挥比较优势，选择和培育替代产业，以市场为出发点，实现产业结构的多元化。     

环境比较优势——一个新“陷阱“

发展是发展中国家的中心问题,环境问题是未来发展的主题,如何避免在发展的同时掉入环境比较优势陷阱,是一个值得大家思考的问题.     

DISCUSSION ON REGION RESOURCE ADVANTAGE OF THE WEST CHINA AND APPROACHES OF ITS INDUSTRIALIZATION DEVELOPMENT

With 70 .82 %ofthetotallandarea ,2 7.6 7%ofthetotalpopulationandrelativelyabundantnaturalresources,thevastwestChinaisextremelyimportantinstrategies.HowtomanagetheeconomicdevelopmentinthewestChinarapidlyhasarousedgreatattentionsinallwalksoflife .Theimportantpoliciesandmethodsaremainlydependingonthelarge scaleex plorationofnaturalresourcesanddevelopmentofrelevantindustries.However ,themisunder standingoflarge scalemineralexplorationsinthewestwillleadtoanoldroadofviciouscircula tion .Becauseofth…     

有机锡通过核受体干扰内分泌的研究进展

有机锡能够作为视黄酸x受体（Retinoid X receptor,RXR）和与过氧化物酶体增殖物激活受体γ（Peroxisome proliferator—activated receptor γ,PPARγ）的激动剂,对RXR激活可能和引起螺类性畸变有关。有机锡还可能通过激活RXR／PPARγ异源二聚体促进脊椎动物脂肪分化和影响脂质代谢平衡。     

区域生态产业链构建优劣势条件与途径分析——-以东莞市为例

文章以国际知名制造业基地——广东省东莞市为例,依据生态产业化相关理论,结合区域社会经济环境实际情况,对生态产业链构建优劣势条件及其途径进行了分析,并提出了相关对策。     

国土空间规划管制与区域经济协调发展研究—一个分析框架

厘清国土空间规划管制与区域经济协调发展之间的关系,是我国国土空间规划管制有效开展的重要前提。论文主要结合国内外最新的实证研究文献,在国土空间规划管制对区域经济协调发展影响的“表现形式—作用机理—协调机制”这一逻辑框架下,分析了国土空间规划管制与区域经济协调发展的关联机理。研究结果表明：1）国土空间规划管制影响区域经济协调发展主要表现在发展受限制区域的土地产权受到抑制和资源环境保护的外部性未能有效地内在化;2）国土空间规划管制影响区域经济协调发展的作用机制在于保护型区域生产的生态产品可贸易性较差,使其落入比较优势陷阱;3）国土空间规划管制下的区域经济协调机制主要包括土地发展权漂移、税费调节和地役权保护。从理论和实践上来看,空间规划管制从诞生起,就面临效率的争议,但在资源环境保护的巨大压力之下,国土空间规划管制在实践层面又非不可调和,关键在于区域经济协调机制的设计。这对我国在建立“多规合一”的国土空间规划体系的时代背景下,为避免新的区域经济协调发展问题具有重要的政策含义。     

Characteristics of high-sulfate wastewater treatment by two-phase anaerobic digestion process with Jet-loop anaerobic fluidized bed

A new anaerobic reactor, Jet-loop anaerobic fluidized bed （JLAFB）, was designed for treating high-sulfate wastewater. The treatment characteristics, including the effect of influent COD/SO42 ratio and alkalinity and sulfide inhibition in reactors, were discussed for a JLAFB and a general anaerobic fiuidized bed （AFB） reactor used as sulfate-reducing phase and methane-producing phase, respectively, in two-phase anaerobic digestion process. The formation of granules in the two reactors was also examined. The results indicated that COD and sulfate removal had different demand of influent COD/SO4^2- ratios. When total COD removal was up to 85%, the ratio was only required up to 1.2, whereas, total sulfate removal up to 95% required it exceeding 3.0. The alkalinity in the two reactors increased linearly with the growth of influent alkalinity. Moreover, the change of influent alkalinity had no significant effect on pH and volatile fatty acids （VFA） in the two reactors. Influent alkalinity kept at 400-500 mg/L could meet the requirement of the treating process. The JLAFB reactor had great advantage in avoiding sulfide and free-H2S accumulation and toxicity inhibition on microorganisms. When sulfate loading rate was up to 8. 1 kg/（m^3.d）, the sulfide and free-H2S concentrations in JLAFB reactor were 58.6 and 49.7 mg/L, respectively. Furthermore, the granules, with offwhite color, ellipse shape and diameters of 1.0-3.0 mm, could be developed in JLAFB reactor. In granules, different groups of bacteria were distributed in different layers, and some inorganic metal compounds such as Fe, Ca, Mg etc. were found.     

江英乡石灰岩山区农业综合开发与治理研究：Ⅱ.农业综合开发与治理

着重讨论了阳山县江某乡石灰岩山区治理试验前的土地资源利用状况和存在问题,总结了综合开发与治理的实践经验。通过对石灰岩山区潜在优势的分折,确立开发与治理的主攻方向,实施调整作物结构、改革耕作制度、推广良种良法和反季节蔬菜栽培等一系列措施,使江某乡农业经济面貌在短短的几年时间内发生了巨大的变化。     

佛山大沥镇发展再生金属行业的必要性及有利条件分析

再生资源行业是21世纪世界性的朝阳产业,其“低开采,高利用,低投入,高回报”的特点及我国明朗的政策,该行业市场前景广阔。大沥是我国唯一的“再生金属物流加工基地”,大沥宽松的经营环境、优越的区位条件、闻名海内外的区域品牌、稳定的进货渠道、快捷的信息来源,为大沥再生金属行业健康、可持续发展创造了有利条件。