With XML becoming a promising standard for data storage, describing, transferring and exchanging information on the Internet, data security and privacy protection of XML become the focus of research in recent years. In order to achieve the authorization of legitimate user and ensure the secure access to sensitive information, in this paper, in the context of cloud storage, with the purpose of sharing sensitive XML information, a polynomial authorization scheme with Kerberos authentication was proposed, which was based on the users' access purpose and privacy policy. In this scheme, first, Kerberos authentication was used to identify the user, and then the polynomial whose coefficients were from the leaf node address was used to complete the authorization of user. For the legitimate user, under the interaction of authorization polynomials and the global structure view, authorization matrix is generated dynamically, its temporary and dynamic characteristics greatly improves the security of the system. Finally, with the help of authorization matrix and auxiliary information tables, security queries were successfully completed. The experimental results show that the scheme not only effectively protects XML sensitive data, but also reduces the server's storage pressure, at the same time it is beneficial to the rapid search and information positioning.

产品经济的时代渐行渐远,以服务为主导的新经济时代悄然来临,给社会和产业带来了结构性的变化.城市文化旅游与公共服务设计之间日益融合,在旅游业中发挥着至关重要的作用.通过对城市文化旅游与公共服务体系及方法进行讨论与分析,提出基于创造性问题解决理论(TRIZ)的公共服务设计,阐述城市文化旅游公共服务体系中的服务蓝图,旨为城市文化旅游的发展带来新的思路.

高校为培育文化创意产业建立孵化基地,设立孵化机构,但由于文化创意产业业态极其灵活,富含变化,使得目前高校孵化模式存在一些问题,比较国内和国外孵化模式,推动高校文化创意产业孵化器快速发展需要国家政策和政府的扶持;着手建设中试基地;建立健全孵化器公共服务平台;着力打造综合性创意人才;构建文化创意产业链.

文章基于对南京城市公共信息导向识别系统的理念定位,结合南京市政府现有的城市建设发展规划,分析南京城市的自然生态环境、历史文化内涵、地域文化特征及人性化需求,提出南京城市公共信息导向识别系统设计的构建方略.

在艺术设计实践教学过程中,如何将具有创意性的想法延展出解决问题的方法是值得关注的问题.CPS教学模式相比于其他创意教学模式更具融合性、交叉性和演绎性.作者将CPS教学模式与艺术设计实践教学有机结合,建构出一种基于CPS教学模式的艺术设计实践教学策略,并对CPS教学模式在艺术设计实践教学中的应用及成效进行分析与总结.

目的 研究视觉传达设计在文化创意产业大环境中的转型、跨界、创新和发展.方法 考量时代背景下的视觉传达设计,并对两者之间的关联性进行分析.结论 文化创意产业下的视觉传达设计不仅是一种文化实践活动,更是一种文化脉络的可持续发展机制,它作为文化创意产业发展的表达载体,更加直接地促进着文化创意产业的繁荣和发展.

Urban public information oriented identification system is one of the information dissemination about the urban public space and the public places,and it is the symbol carrier of the urban information dissemination.It has the functions of guidance instruction,visual recognition,convey information and dissemination of culture in many aspects.This paper took the urban public information oriented identification system as the main research object,analysed the redundant information in the urban public information oriented identification system of the factors.In addition,the author thought that the redundant information in the urban public information oriented identification system could be divided into effective redundancy and invalid redundancy.Both of them had their own causes,which had influences on the information dissemination in the oriented identification system.

本文在对视觉传达设计中绿色设计理念得以成功运用的优秀案例进行分析,分别从公益广告、企业形象、书籍装帧、包装设计,以及从平面的二维形态上升到三维的空间来呈现它们的“绿色之美”,探讨视觉传达设计中展现绿色设计的形式与方法.从“形”与“意”两个角度,结合一些优秀的案例来探析视觉传达设计中蕴涵的“绿色之美”,以期达到抛砖引玉的作用.

高校文化创意产业目前仍然处于刚刚起步,大部分高校文化创意产业仅处于贩卖文化创意构思的阶段.本文通过对高校文化创意产业的现状进行分析,研究高校文化创意产业一体化的优势,即垂直一体化和混合一体化,并提出高校文化创意产业一体化的设想模式.

文章提出了现代景观设计中意境美的追求手法,分析了现代景观设计中意境美所包涵的具体内容,以及如何为公众营造优美的现代自然环境提出了新的观点,通过阐述传统园林造园手法的意境美为审美教育载体,详致的提出以人为本的"物境、情境、意境"的综合作用.文章以南京实际案例进行分析,指出意境美如何运用以及如何打造出"天人合一"的现代自然景观设计的方法.

全球化加速一方面给人类社会发展提供了良好的机遇,另一方面给民族文化和城市特色地域文化的发展带来了极大的挑战,导致全球出现文化同化现象.南京是一座文化名城,魏晋风骨、六朝遗韵乃至唐宋以来的诗词歌赋、话本辞章,这些积淀造就了今日南京独特的文脉.文章以古都南京城市文化发展策略为视角,探讨城市系列文化标志设计的要素、原则和方法,从而更好地塑造南京城市品牌,提升南京城市的文化品位,树立南京城市的特色形象.只有在融合地域文化理念的基础上设计城市文化标志,才能更好地促进城市的可持续发展,使城市更加富有特色和生命力.

本文将通过考量六朝时期造物设计的文化元素,从器物的功能、造型、装饰、材料与技艺等角度进行分析,以此来反映六朝时代思想文化的变迁.设计文化的发展与人们的社会生活有着密切的联系,具体器物所体现的技艺与尺度构成了人与物关系的和谐空间,反映了当时人们社会生活的行为方式和思维方式.

针对不同轴距车辆路径跟踪鲁棒性,提出了基于滑模自抗扰控制的平行泊车路径跟踪算法.该算法利用线性滑模控制设计自抗扰控制律中的误差反馈环节,改善了自抗扰控制器的结构,能适用于不同轴距车辆.线性自抗扰控制器能够观测和补偿由于不同车辆轴距引起的不确定性和车辆受到的外界干扰.在假定低车速和小侧偏角情况下,控制器的设计考虑非线性运动学模型及运动学约束.仿真结果表明,基于滑模自抗扰控制的路径跟踪控制算法能够将不确定性部分观测出来并且补偿掉,保证了不同轴距车辆很好地跟踪规划的理想泊车轨迹.

A reduced scale experiment has been conducted to investigate the icing accretion procedure on a rotating spinner of 60° cone angle. The experiment was carried out in a small scale ice wind tunnel with three different rotating speeds of the spinner. The experimental conditions were determined from the actual icing condition of the spinner of a turbofan engine by using the similarity theory, which considers the rotating effects. The ice thickness on the spinner was got from the image taken by the high speed camera, by image processing. The results of this investigation show that under the experimental condition, ice on the spinner’s tip of three different rotating speeds are all glaze ice and about the same thick. However, on the downstream surface of the spinner, ice shape on the rotating spinner is different from that on the stationary spinner. It is uneven glaze ice on the stationary spinner while it is ‘particle ice’ when the rotating speed is 8240 rpm and it is ‘needle ice’ when the rotating speed is 15,200 rpm. The experiment also reveals that when the rotating speed is higher, the ice layer is thicker.

The thirst for knowledge is oriented role in the process of students for knowledge,stimulate curiosity can greatly enhance the enthusiasm of the students initiative.In turn as the starting point,Jincheng College of Nanjing University of Aeronautics and Astronautics students to investigate,including elective creation of the status quo,the direction of improvement,credit the charges state Commencement mode.According to the survey results,analyzed stimulate the curiosity of college students not only from the point of view of the student's needs,but also further optimize the way teachers teach,so as to stimulate student learning initiative.

American pragmatist philosopher,thinker Dewey's famous advocate of Education "Education is life,revealing the" knowledge is the process of human life,intellectual curiosity has always been throughout human life.The thirst for knowledge of different individuals and there are differences,as a starting point,Jincheng College of Nanjing University of Aeronautics and Astronautics students to investigate science and engineering students and humanities students' intellectual curiosity of economics and management courses,according to the survey results,obtained by analysis of variance differences,and analyze the reasons that caused the difference,and thus the creation of elective courses for the optimization of Economics and Management rationalization proposals,fully stimulate the intellectual curiosity of different individuals.

概念书籍是一种秉承传统书籍设计理念,合理表达书籍内容并寻求新的表现形式的新形态书籍。它是运用创新思维和表现形式的独特书籍设计语言,也是一种探索性的设计行为。本文主要讨论概念书籍的形式如何突破传统,并产生"间离效果",并对此提出相关的建议。

The large output current ripple impairs the performance of two-transistor forward converter (TTFC). Due to the AC flux positive coupling of the inductor and transformer, the output current ripple can be reduced. The improved TTFC with integrated magnetics is proposed in this paper. The operation principle of the proposed converter is analyzed in detail along with the effect of the IM on the primary and output current ripples. The condition of the minimum output current ripple and the corresponding design consideration for the integrated magnetics are discussed. Two 850 W/200 kHz TTFC prototypes, with integrated magnetics and without, are built to verify the effectiveness of the analysis.

Clamping diodes have been introduced into the zero-voltage-switched (ZVS) phase-shifted full-bridge (PSFB) pulse-width-modulated (PWM) converters to eliminate the voltage oscillation across the output rectifier diodes. However, the clamping diodes suffer from serious reverse recovery problem in output inductor discontinuous-current-mode (DCM) operation, impairing the reliability of the converter. A novel PSFB converter with clamping diodes and current transformer (CT) is proposed. The operation principles of the novel converter operating in output inductor CCM and DCM are analyzed in detail. The operation condition for the clamping diodes, the design considerations of the introduced CT and the output inductor are also given. Three 1200 W ZVS PSFB dc/dc modules, one being the conventional converter without CT, and the other two being the novel converters with different winding ratio of CT, are built for verification and comparison. Experimental results verify the effectiveness of the analysis and prove that the proposed converter has better reliability and higher efficiency compared with the conventional one.

The large output ripple current impaired the performance of Active clamp forward (ACF) converter. By the ac flux positive coupling of the inductor and transformer, the output ripple current can be reduced. The improved ACF converter with integrated magnetics is proposed in this paper. The operation principle of the proposed converter is analyzed in detail. By setting D=0.5 as the zero ripple current point, the minimized output ripple current and minimized voltage stress of primary switches are achieved simultaneously. The design consideration for the integrated magnetics is discussed along with the effect on the ripple currents. Two 100W ACF prototype converters, with integrated magnetics and without, are built to verify the operation principle. Experimental results also proved that the proposed ACF converter has higher efficiency compared with conventional one.