房价上涨的结构性差异研究——基于土地供给的视角

利用中国2000-2009年282个地级及以上城市的面板数据,采用双重差分法和PSM-DID识别策略,从土地供给的角度研究区域房价上涨的结构性差异特征的成因。自2003年起,国家土地供给政策开始向中西部地区倾斜,减少了东部地区但增加了中西部地区的土地供给,这使得东部地区用地更为紧张,从而导致东部地区房价相对上涨较快。实证分析发现,控制住经济发展水平、人口规模、金融便利性和城镇化等因素的影响之后,偏向中西部的土地供给导致东部地区城市房价至少上涨了6.51%,表明区域土地供给差异导致房价上涨的结构性差异。     

《论语》的沿革

由于时代的不同、地域的差异,《论语》的版本及其注释在传承过程中呈现出诸多的变化。从《论语》发展变化的宏观角度来看,《论语》在传承过程中经历了三个关键性的历史阶段：汉朝时期,《论语》的版本及注释逐渐形成;宋朝时期,《论语》杂糅各学,内涵逐渐丰富;19世纪末20世纪初,《论语》得到了新的诠释,并直接影响当前对《论语》的解读。     

民国期刊中的浙江武术文献探析

民国时期,浙江武术发展成果显著。运用文献资料法、内容分析法对民国期刊中关于浙江的武术文献进行了梳理和分析。通过研究,发现民国期刊中的浙江武术文献内容丰富、非常清晰,全面地反映了民国时期浙江武术的发展状况,体现了较高的历史文化、学术资料价值和重要的现实参考价值。民国期刊关于浙江武术的文献记录了民国时期浙江武术发展的历史轨迹;丰富了民国体育史研究的内容;对今天武术的推广有重要的启示。     

In situ growth of large-area and self-aligned graphene nanoribbon arrays on liquid metal

Intrinsic graphene features semi-metallic characteristics that limit its applications in electronic devices, whereas graphene nanoribbons (GNRs) are promising semiconductors because of their bandgap-opening feature. However, the controllable mass-fabrication of high-quality GNR arrays remains a major challenge. In particular, the in situ growth of GNR arrays through template-free chemical vapor deposition (CVD) has not been realized. Herein, we report a template-free CVD strategy to grow large-area, high-quality and self-aligned GNR arrays on liquid copper surface. The width of as-grown GNR could be optimized to sub-10 nm with aspect ratio up to 387, which is higher than those of reported CVD-GNRs. The study of the growth mechanism indicates that a unique comb-like etching-regulated growth process caused by a trace hydrogen flow guides the formation of the mass-produced self-aligned GNR arrays. Our approach is operationally simple and efficient, offering an assurance for the use of GNR arrays in integrated circuits.     

一种基于重排首次匹配算法的新颖并行Turbo译码器存储方案

In this paper we discuss a novel storage scheme for simultaneous memory access in parallel turbo decoder. The new scheme employs vertex coloring in graph theory. Compared to a similar method that also uses unnatural order in storage, our scheme requires 25 more memory blocks but allows a simpler configuration for variable sizes of code lengths that can be implemented on-chip. Experiment shows that for a moderate to high decoding throughput （40-100 Mbps）, the hardware cost is still affordable for 3GPP＇s （3rd generation partnership project） interleaver.     

应用MATLAB求线性方程组的Cramer法则方法探讨

本文分析了几种用MATLAB求解线性方程组的Cramer法则的方法,并指出这些方法的改进过程及其教学价值.     

汪精卫叛国投敌原因综述

对史学界关于汪精卫叛国投敌的决定性因素的七种争议进行综述 ,并提出几点思考     

CERN document server: Document management system for grey literature in a networked environment

Conclusion In this paper we briefly described the current status of research in the field of digital libraries interoperability, mainly with respect to federated data processing such as permitted within the Open Archive Initiative framework. We then presented the CERN Document Server Software suite that is a free software package main-tained by CERN providing an online digital library solution for mid- to large-sized document repositories. The set of CDSware modules was described and the differ-ences with other existing tools briefly mentioned. Finally we have mentioned a typical usage statistics illustrating the scope of grey literature and networked con-ditions of the CERN Document Server. We pointed out that the current trend in grey literature management goes toward institutional repositories build upon the distributed and federated model. Further research is going on within the CDS collaboration in this area, focused particularly on (i) semantic interoperability using ontologies in distributed and federated data processing and (ii) ranking technologies when searching grey literature in OAI compliant repositories.     

普通植物病理学实践性教学的探索

实践性教学是实现高等学校教学目标、培养和造就具有创新精神和实践能力的高素质人才的重要环节。笔者结合多年普通植物病理学实践性教学的经验,从改进实验课教学、加强教学实习环节、改革传统考核制度、鼓励学生走进实验室、在教师的指导下参与科研活动、提高任课教师的综合素质等多方面探讨了普通植物病理学具体的实践性教学方法,并提出了该学科实践性教学中有待改进和加强的方面。     

The didactics tradition in South Africa: a reply to Richard Krüger

There has been a growing interest in the European Didaktik tradition as part of a process of ‘internationalizing’ curriculum studies. Krüger provides useful insights into some aspects of Didaktiek in South Africa. However, the essay does not contextualize this tradition within the broader history of South African education. This reply contends that Didaktiek was interwoven with ‘fundamental pedagogics’ and as a consequence played a role in reproducing apartheid ideology—it did not provide a language of critique or possibility. This is one reason why the tradition has seen its demise in post‐apartheid South Africa. I argue that curriculum theory, which crucially deals with the relationship between schooling and society and highlights the socially constructed nature of schooling, offers a more useful alternative for critiquing apartheid education policy and for charting a process of transformation of education in South Africa.