基于用地竞争力的潜在土地利用冲突识别研究——以北京大兴区为例   总被引：12，自引：0，他引：12  

刘巧芹  赵华甫  吴克宁  于潇  张清军 《资源科学》2014,36(8):1579-1589

潜在土地利用冲突识别是因地制宜地预防和破解用地冲突的基础和前提。本文以北京市大兴区2012年高分辨率遥感影像为主要数据源,以150m×150m格网为识别单元,基于建设、农业和生态用地竞争力评价识别了该区潜在土地利用冲突,并针对冲突类型特点提出了相应的管理政策建议。结果表明:1该方法更准确地体现了潜在土地利用冲突的本质内涵,可辨识出潜在土地利用冲突类型及其特点和预期土地利用变化趋势;2大兴区11种潜在土地利用冲突类型中,建设用地优势区主要分布在现状建设用地及其周边,农地优势区在中部和南部集中连片分布,生态用地优势区主要位于永定河沿岸等维护区域生态安全的核心区,三者分别占全区土地总面积的52.85%、28.12%和0.83%,反映了当前建设用地急剧扩展、农地空间不断被压缩和生态环境亟需改善的土地利用现状,而其他8种潜在冲突分布均介于上述三种优势区中的两种或三种之间;3大兴区在优化提升用地效率、严格控制新增建设用地的同时,建设用地优势区、建设与农业激烈冲突区、农业用地优势区和三类用地激烈冲突区内的优质耕地应优先划入基本农田加以重点保护;其他应宜农则农,宜生态则生态,通过差别化补贴政策,引导农业生产向特色高效现代农业发展,并促使边际耕地退耕还林。  相似文献   

基于洛伦茨曲线和基尼系数的郑州市用水结构分析   总被引：3，自引：0，他引：3  

刘欢  左其亭 《资源科学》2014,36(10):2012-2019

针对2005-2011年郑州市各市县的用水现状数据,首次将洛伦茨曲线和基尼系数应用到用水结构分析中,对现状年下郑州市各类型用水的空间分布情况及近年来的变化特点做了定量分析和探讨,为区域用水结构分析提出一种新的技术方法。结果表明:从空间尺度上看,郑州市生活用水最为均衡,各地区相差最小;工业用水相对均衡,农业用水较不均衡,生态用水极度不均衡。从时间尺度上看,生活用水和工业用水的不均衡度有所降低,但变幅不大;农业用水的区域分布更加集中,生态用水的均衡度有明显的提高,但还远远不够。整体来看,郑州市用水结构空间分布总体呈良性发展态势,但仍存在诸多问题,用水结构仍需进一步优化。分析结果与郑州市用水结构实际情况基本相符,可以为区域水资源利用与产业结构间优化协调提供参考。  相似文献   

土地违法现象的省际差异及其动态分析     

王良健  龚星文  朱石牛 《资源科学》2014,36(7):1336-1346

本文从全国和省际两个层面、案件宗数及违法程度两个角度分析了我国土地违法现象的现状及相关特征,采用锡尔指数和艾肯森指数等方法测算了我国2002-2011年间土地违法现象的区域差异并分析其动态演变特征,最后结合聚类分析的结果对当前的区域差异进行深入分解探讨。结论显示:①我国近10年的土地违法案件宗数呈现三阶段的波浪式下降态势,但涉案面积并未得到有效控制,土地违法程度在10年间不断加深;②非法占地行为成为我国当前土地违法现象的最主要构成因素;③我国土地违法现象的区域差异在近10年间存在先扩大后缩小的倒"U"型态势;④我国土地违法的高发区、次高发区、次低发区及低发区四大区域的总差异中,区域间差异占主导,但2008年以来区域内差异呈扩大之势。  相似文献   

Applying the technology acceptance model to a Spanish City Hall     

José Luis Moreno Cegarra  Juan Gabriel Cegarra Navarro  José Rodrigo Córdoba Pachón 《International Journal of Information Management》2014

This paper examines the relative importance and significance of the four technology enablers introduced by Davis (1989) in the technology acceptance model (TAM) (perceived ease of use, perceived usefulness, attitude towards using and behavioural intention) for use on four different levels of citizen engagement in e-government (null, publish, interact and transact). An extended technology acceptance model (TAM) is developed to test citizen engagement towards online e-government services from a sample of 307 citizens who used the benefits advisor tool within a Spanish City Hall. Although the proposed model follows TAM and explains the intention towards the actual use of e-government by postulating four direct determinants, “A, PU, PEOU and BI” have been considered as parallel processes, meaning that each can have separate influence in different levels of citizen engagement. To achieve this goal, a multinomial logistic regression is developed and tested to confirm the explanatory power of the four technology enablers on the four different levels of e-government. Our findings further suggest that in order to implement e-government, some of the enablers matter more than others to move from one level of citizen engagement to another. The main contribution of the paper is to question the use of existing models which seek to represent the relationship between technology enablers and the adoption of e-government services without considering their impacts on citizens’ engagement. The implications of the findings are discussed and useful insights are provided in relation to policy recommendations geared to create appropriate conditions to build citizens’ engagement intent of use of e-government services.  相似文献   

The relationship between perceived value and information source use during KM strategic decision-making: A study of 17 Chinese business managers     

Yang Lin  Charles Cole  Kimiz Dalkir 《Information processing & management》2014

The study explores the relationship between value attribution and information source use of 17 Chinese business managers during their knowledge management (KM) strategic decision-making. During semi-structured interviews, the Chinese business managers, half in the telecommunications sector and half in the manufacturing sector, were asked to rate 16 information sources on five-point Likert Scales. The 16 information sources were grouped into internal–external and personal–impersonal types. The participants rated the information sources according to five value criteria: relevancy, comprehensiveness, reliability, time/effort, and accessibility. Open-ended questions were also asked to get at how and why value attribution affected the participants’ use of one information source over another during decision-making. Findings show that the participants preferred internal–personal type of information sources over external–impersonal information sources. The differences in value ratings per information source were striking: Telecommunications managers rated customers, newspapers/magazines, and conferences/trips much lower than the manufacturing managers but they rated corporate library/intranet and databases much higher than manufacturing managers. The type of industrial sector therefore highly influenced information source use for decision-making by the study’s Chinese business managers. Based on this conclusion, we added organizational and environmental categories to revise the De Alwis, Majid, and Chaudhry’s (2006) typology of factors affecting Chinese managers’ information source preferences during decision-making.  相似文献   

Actors’ misaligned interests to explain the low impact of an information system – A case study     

《International Journal of Information Management》2014,34(2):296-307

The lack of success of information systems has been studied extensively. However, often only the implementation of an information system is studied without analysing the consequent effects on its adoption and later use. Our paper uses actor network theory to show how successful implementation and adoption can lead to a low level of later use and lack of achievement of the declarative goals. The same actors may form networks leading to a successful outcome in one particular situation but not in another. In such a way seamless implementation can hinder the subsequent use and hide problems from the management. An analysis of a case study of an information system's implementation, adoption and later use in a primary school allows a better understanding of the reasons for the subsequent low use.  相似文献   

市级土地利用总体规划实施中心城区用地布局评估研究     

杨旺彬  罗华艳  冯洁 《大众科技》2014,(3):183-185

为适应国家有关规划的编制和实施,全面掌握土地利用总体规划实施情况,提高土地利用总体规划实施管理科学化、规范化水平,开展土地利用总体规划实施中期评估工作迫不及待。在实际评估工作当中,市级土地利用总体规划实施中心城区用地布局评估是一个重点和难点,文章以崇左市为例,研究土地利用总体规划实施中心城区用地布局评估新思路,为同期类似评估提供切实可行的新模式。  相似文献   

北流市土地可持续利用研究     

陈宇  陈书荣  农丰收 《大众科技》2014,(9):209-213

研究目的：以县级北流市土地利用利用为基础,探讨土地可持续发展的思路和对策措施,期望对当前土地可持续利用研究和实践有所裨益。研究方法：以可持续发展理论为支撑,以北流市土地利用利用为研究对象,研究北流市土地可持续利用。研究结果：根据可持续利用理论和思路主要从耕地保护、建设用地统筹安排利用和生态环境建设三个方面着手,研究土地可持续利用的具体思路和措施。研究结论：（1）土地可持续利用的通俗定义;（2）土地可持续利用的目标和土地可持续利用的思路;（3）北流市全面推进土地可持续利用的具体措施。  相似文献   

南宁壮族大学生语言使用及语言态度调查--以广西民族大学为例     

叶俐丹 《大众科技》2014,(8):186-188

语言使用和语言态度调查是社会语言学中的重要方向。以在南宁的壮族大学生为对象,了解他们的壮语和汉语水平,调查他们对壮语、汉语以及壮汉双语所持的态度,进而分析语言使用和语言态度的关系,以期为壮语研究增加一个实例。  相似文献   

网络环境下学位论文版权的开发与保护     

梁淳 《情报探索》2014,(8):33-35

在分析学位论文版权归属的基础上,结合国内外相关经验,从合理使用、授权许可、技术手段等方面,提出了网络环境下学位论文版权保护与利用的对策建议。  相似文献