PCB企业要优先选用民族品牌的产品——PCB企业的软实力(8)

文章概述了我们要依靠社会制度的优越性、依靠爱国主义精神与行动和依靠民族工业的发展与进步,才能建设成为伟大的社会主义的强国!     

北京大学“你好营养”健康宣教公益团队社会实践活动探索

北京大学“你好营养”健康宣教公益团队是由北医营养与食品卫生系33名研究生组成,在本院系专家教授的指导下,以公益讲座、网站宣传等形式为社区居民服务,通过健康理念传播提高公众营养和健康意识,实现“履行社会责任、知识回报社会”。2010年4月到8月,“你好营养”团队以城乡结合部社区居民为重点服务人群,在北京和太原两地完成12个社区共20场营养健康宣教和营养咨询服务系列活动,参与人数达3 500余人,多家媒体给予关注报道。团队正在实施和规划中的活动包括响应相关政策,在北京逐步建立多个“营养改善示范社区”,在全国医     

Endogenous Innovation, the Organization of Work and Institutional Context

Drawing on the results of the third Community Innovation Survey and the third European Working Conditions Survey, this paper develops aggregate indicators at the national level of innovation modes and forms of work organization for the 15 member nations of the European Union in 2000. The analysis based on these indicators demonstrates that there is a close connection between how people work and learn in a country and the way firms＇ innovate. Specifically, it shows that in nations where work is organized to support high levels of discretion in solving complex problems firms tend to be more active in terms of endogenous innovation, i.e. innovation developed, at least to some degree, in house. In countries where learning and problem-solving on the job are more constrained, and little discretion is left to the employee, firms tend to engage in a supplier-dominated innovation strategy. The technological renewal of these firms reflects, almost exclusively, absorption of innovations developed elsewhere.     

Editorial

Mobile pedestrian navigation systems are one of the most popular Location-Based Services. In the era of Web 2.0, current mobile navigation systems often suffer from the following problems: the lack of social navigation support (utilising other people's experiences) and the challenge of making user-generated content (UGC) useful. In this article, some collective intelligence-based route recommendation methods are designed to address these problems. The proposed methods can make use of UGC (reflecting other users’ navigation experiences), and provide users with the least complex and the length-complexity-optimised (LCO) routes. Some simulations using the street network of the first district of Vienna (Austria) are designed to evaluate the proposed methods. The results show that compared to the shortest route, the collective intelligence-based routes (i.e. the least complex and the LCO routes) have a significant improvement of the route quality (with lower complexity ratings), thereby more effectively supporting users’ navigation tasks (more chances of reaching the destination, fewer mistakes made and shorter distance travelled).     

人机共存环境下巡检机器人自主移动与避障方法

为提高人机混杂环境中移动机器人自主巡检效率,提出一种基于模糊逻辑理论的避障方法。通过分析人 类的社会行为规则,结合机器人的运动特性,建立移动机器人系统的数学模型,将人机距离、人的行为模式和人与 机器人间的相对速度参数进行模糊化处理,得出基于模糊推理方法的机器人速度变化决策,利用模糊控制规则,实 现模糊逻辑控制,并通过穿越和相遇2 种运动行为进行了实验验证。仿真结果验证了该方法具有抗干扰性和良好的 避障性能。     

社交媒体中转基因食品的媒介框架研究——基于美国YouTube视频网站的案例分析

社交媒体在科学传播中扮演的角色日益重要,在促进争议科学题材的传播中发挥的作用尤为显著。本文以世界上最大的社交视频网站You Tube中的转基因食品短片为案例,从传播主体、媒介框架和传播技巧三方面来分析社交媒体的框架建构过程。研究发现,在You Tube网站上美国的各种社会组织抢占了绝对的话语主导权,媒体也有积极参与,而政府和科研机构基本处于失语状态。在媒介框架上,最多的一类是关于食品安全、经济和科技的话题,且大部分都具有负面属性。在塑造技巧上,最受欢迎的短片大部分具有刺激性标题、诉诸于情感和特定价值、制造矛盾吸引受众三个显著特点。     

关于我国推进智慧城市的思考与建议——从我国社会经济发展及转型的视角

首先阐述了我国特色的城市化进程以及"智慧城市"产生的背景,其次重点分析了智慧城市区别于数字城市的主要特点以及对传统城市运行管理的影响,并提出了智慧城市的总体架构。基于我国智慧城市的发展现状,结合我国基本国情,探讨了对于我国推进智慧城市的策略思考。最后提出了相关的政策建议。     

科技时代下中国当代婚姻观的影响因素

婚姻家庭生活是人类生活中必不可少的部分,是社会的基本细胞。本文结合时代特点就中国当代婚姻观的影响因素从西方文化观念的冲击、传统婚姻道德的碰撞、现代社会思潮的影响及当代文化建设的滞后等方面进行了分析探讨,力图构建和谐的符合时代发展需求的正确的婚姻观。     

基于SEOA算法的抽水蓄能梯级水库调度研究

针对含混合式抽水蓄能电站的梯级水库发电调度的维数灾问题,在考虑历史径流序列随机性和非线性特点的基础上,建立含混合式抽水蓄能电站的梯级水库长期优化调度模型。文中以调度期内混合式抽水蓄能电站梯级水库发电量最大为目标函数,引入改进社会情态优化(SEOA)算法编程求解。仿真结果表明,新方法在混合式抽水蓄能电站梯级水库发电优化调度问题中既能减少传统算法的冗余计算,又可有效地结合决策者的主观偏好和利益倾向。对比动态规划算法,新方法在较短时间内得到年发电量为66.96×10 ⁸ kWh的高质量解。     

Privacy-preserving photo sharing framework cross different social network

With rapid developments of digital photography and social networks,users of photo-sharing-supported social networking applications can easily forward photos across different social networks at the cost of their growing privacy concerns.To address this problem,a privacy-preserving photo sharing framework was proposed,which could apply to extended control and privacy invasion tracing.In extended control scheme,the following users on a dissemination chain was restrained by each user’s privacy policy.Then several privacy areas of photos were encrypted and the access control polices were bound to the uploaded photos,so that any privacy areas on the photos could be hidden away from unwanted viewers even across different social networks.On this basis,the behaviors of users were record by tracing scheme of privacy invasion,the integrality of records was protected by using nested signature algorithm.The correctness,security and performance of overhead of the scheme are then thoroughly analyzed and evaluated via detailed simulations.