Incentive mechanism design of access management policy in affordable housing and analysis

Affordable housing is of much importance for Chinese subsidized housing. However, the implementation of the affordable housing policy is facing several problems. One crucial problem is that the current policy cannot effectively identify high-income applicants who are not qualified to apply for affordable housing. Based on the theory of incentive mechanism design, this paper reveals that the current allocation institution has no incentive compatibility. To remedy this shortcoming, a new model for the management of affordable housing is established. Finally, an example is given to show how the proposed model can help improve the overall process of managing the allocation of affordable housing in China.     

哈萨克斯坦阔温拉德10Kt/a湿法炼铜项目顺利投产运行

哈萨克斯坦阔温拉德10Kt/a湿法炼铜项目采用堆浸-萃取-电积工艺,在高寒地区从低品位废石中回收金属铜,并取得了满意的效果。本文简单介绍了该项目的背景及进展,并针对本项目的特点对工艺流程、主要工艺设备以及主要技术经济指标进行了阐述。     

CATB改性SPAO-44分子筛吸附脱碱性氮研究

研究了十六烷基三甲基溴化铵(CTAB)改性SAPO-44分子筛对模拟油中的碱性氮化物吡啶的吸附特性。考察了CTAB物质的量对SAPO-44分子筛吸附碱性氮化物性能的影响,并对吸附脱碱性氮的吸附等温线、动力学、热力学进行了研究。结果表明,当添加的CTAB物质的量配比数值为0.06时,最大平衡吸附量达到7.24 mg/g;与未改性SAPO-44分子筛相比,改性SAPO-44分子筛对碱性氮的吸附效果更好。改性SAPO-44分子筛对碱性氮的吸附等温线更符合Freundlich方程,该吸附过程符合拟二级动力学模型,吸附活化能为48.25kJ/mol。     

硅线石颗粒／LY12搅融混合后半固态挤压成形件组织与性能研究

采用搅融混合并半固态挤压成形后，使硅线石颗粒与基体ＬＹ１２复合。试验测定结果表明，半固态挤压得到的复合材料制件组织为变形后的再结晶组织，有良好的力学性能和低的热膨胀系数，为硅线石增强铝基复合材料研究和应用奠定了基础。     

CONVERSE REASONING FOR FULL DEPRESSION－FEATURE MODEL AND PROCESS

A new approach, namely, "defining protrusion-feature with depression-parameter" is advanced, which focuses on the shortcomings of protrusion-feature alteration method; The full depression-feature model is built up, and a basic converse reasoning iterative algorithm for machining process is given. The detailed examination has been implemented on the feature-based modeling system for light industry product (QJFMS) and the converse reasoning on fixture-based machining process is achieved.     

将生态引入卫生间设计

住宅卫生间是室内环境的重要组成部分,本文从生态化设计的理念出发, 提出了卫生间的设计原则和技术实现手法。     

鄂尔多斯盆地延长组长9油层组成藏地质条件

通过对鄂尔多斯盆地长9油层组成藏地质条件的分析,认为长9油藏的油源主要来自于上覆长7油层组和其本身两套烃源岩,但志丹地区长9油藏原油来源于长9烃源岩,无长7烃源岩的混入。长9油层组含油段主要集中在长9¹亚段,储集体主要发育于辫状河三角洲平原相分流河道砂体及三角洲前缘水下分流河道砂体,部分为半深湖亚相浊积岩砂体。长9储层的岩石类型主要为岩屑长石砂岩,以粒间孔为主,孔隙度、渗透率总体较低。平面上储层物性分布差异性较大,姬塬地区砂岩粒度粗,粒间孔发育,物性最好;而发育碳酸盐胶结物的洛川地区孔隙不发育,物性最差。根据源-储关系,长9油层组主要发育上生下储、自生自储两种成藏组合类型。据综合分析,姬塬地区成藏条件较好,为下一步勘探的最有利区。     

2007"台达杯"国际太阳能建筑设计竞赛颁奖典礼隆重举行

2007年9月21日,在2007世界太阳能大会即将落下帷幕之际,2007"台达杯"国际太阳能建筑设计竞赛颁奖典礼在京隆重召开。国际太阳能学会理事长Torben Esbensen,中国建筑学会秘书长周畅、中国建筑学会秘书长孟宪淦、2007世界太阳能大会执行主席孔力,国家住宅与居住环境工程技术研究     

Growth process and microwave absorption properties of nanostructured γ-MnO2 urchins

A low-temperature hydrothermal method was developed to synthesize urchinlike γ-MnO₂ nanostructures. Time-dependent evolutions of morphology and crystallinity were investigated to explore the growth mechanism of the γ-MnO₂ urchins. The results show that the growth process of the γ-MnO₂ urchins occurs in two main stages, which are the generation of γ-MnO₂ microspheres and the following epitaxial growth of γ-MnO₂ nanoneedles on the surface of the initial microspheres. Microwave absorption properties of the urchinlike γ-MnO₂ nanostructures were studied in terms of complex permittivity and permeability. An effective absorption bandwidth (reflection loss lower than −10 dB) of 8.8 GHz was achieved from the γ-MnO₂/paraffin wax composite.     

基于改进的K-means的车牌字符分割

提出了一种基于改进的K-means的车牌字符分割方法。该方法首先利用均值跳变法对车牌区域进行精确定位,再利用改进的K-means算法对车牌字符进行聚类,最后根据K-means算法得到的聚类中心对车牌字符进行分割。实验结果表明,该方法能够准确地分割出车牌字符,且具有较强的抗干扰性。