A multi-criteria assessment tool for screening preliminary product platform concepts

Platform concept evaluation is a more challenging task than evaluating a single product concept since a platform must effectively support multiple product variants over a prolonged period of time. Existing platform methods develop specific criteria in depth, yet an evaluation of alternative platforms should be based on a broad set of criteria. Based on expert interviews, personal experience, and a literature search we propose a platform assessment tool consisting of 19 criteria for platform evaluation. The criteria are group into six categories: customer satisfaction, variety, after-sale, organization, flexibility, and complexity. The tool is focused on the early platform architecture phase, before proof-of-concept prototyping. However, it can also be used subsequently for platform refinement when more data becomes available. We demonstrate our platform assessment tool through an example with a cordless drill platform.     

Daonity – Grid security from two levels of virtualization

The service oriented architecture of grid computing has been thoughtfully engineered to achieve a service level virtualization: not only should a grid be a virtual machine (also known as a virtual organization, VO) of unbounded computational power and storage capacity, but also should the virtual machine be serviceable in all circumstances independent from serviceability of any of its component. At present, a grid VO as a result of service level virtualization only is more or less confined to participants from scientific computing communities, i.e., can have a limited scale. It is widely agreed that for a grid to pool resources of truly unbounded scale, commercial enterprises and in particular server-abundant financial institutions, should also “go for the grid,” i.e., open up their servers for being used by grid VO constructions. We believed that it is today's inadequate strength of the grid security practice that is the major hurdle to prevent commercial organizations from serving and participating the grid.This article presents the work of Daonity which is our attempt to strengthening grid security. We identify that a security service which we name behavior conformity be desirable for grid computing. Behavior conformity for grid computing is an assurance that ad hoc related principals (users, platforms or instruments) forming a grid VO must each act in conformity with the rules for the VO constitution. We apply trusted computing technologies to achieve two levels of virtualization: resource virtualization and platform virtualization. The former is about behavior conformity in a grid VO and the latter, that in an operating system. With these two levels of virtualization working together it is possible to build a grid of truly unbounded scale by VO including servers from commercial organizations.     

短信网关平台的设计方案

手机短信现已作为人们获取信息最便捷、经济的方式之一,其服务内容也不断向个性化、生活化和专业化方向发展.针对手机用户的需求,提出了一个具有良好性能、强大扩展性和易维护性的短信网关的设计方案.     

网络化制造平台中的跨平台计费管理系统

网络化制造平台中的计费系统是进行网络化制造平台管理的核心组成部分,除传统计费功能外,还需要解决不同网络服务供应商跨子平台联合计费的新问题。以EURESCOMP906工作组提出的QCS(Quality Class Specification)计费模型为理论基础,以北京市网络化制造平台为研究背景与应用实例,重点从计费框架、计费体系和计费方案三个方面进行深入研究,构建了跨子平台计费管理系统的基本构架和实现方案研究,并对实际计费管理系统的应用实例进行描述,提出了一种可行的网络化制造平台统一计费管理方案。     

MSTP技术在电力系统的应用

合理利用MSTP技术能更好地满足电力系统传输各种业务的要求。文章根据MSTP技术的特点,分析了用MSTP传输电力系统调度业务及生产管理业务的组网可能性。借鉴MTSP技术在电信行业的应用情况及经验,提出了电力系统应用MSTP时需要注意的几个问题。     

High Altitude Platform Station (HAPS): A Review of New Infrastructure Development for Future Wireless Communications

This paper looks into the relatively new field of high altitude platform stations. HAPS is seen as a ‘middle ground’ between the terrestrial and satellite cases, and aims to exploit of the advantages of both types of system. Since HAPS is such a new field, this paper focuses on the technology behind a HAPS communications system, how this has developed, and compares it to the terrestrial and satellite equivalents. One important area that is being investigated is the applications for which HAPS should be used. This is a critical issue if a significant business case is to be made for HAPS. Worldwide HAPS projects and research issues are also highlighted. Finally, the review concludes with the remarks on the future of HAPS for wireless communications systems.     

电子雷管在地铁隧道爆破降振中的应用

研究地铁隧道穿越十字路口和相邻燃气管线时,使用电子雷管的爆破方案及方法。利用电子雷管可以任意设置时间的特点,重点研究上、下台阶间及隧道间的最佳延时间隔时间。确定起爆的间隔时差,通过干扰错峰来达到减振的效果,使爆破振动对周围燃气管线的影响达到最小。     

Development of multiple robotic fish cooperation platform

This article presents the development of a multiple robotic fish cooperation platform, which is established by employing a group of radio-controlled, multi-link fish-like robots. This work is inspired by the observation from nature that the capability of one single fish is limited, as in order to survive the atrocious circumstances in the sea, fish often swim in schools. The analogical situations occur in the robotic fish case. In engineering applications, most missions are so complex that they must be accomplished by effective cooperation of multiple fish robots. The platform presented in this article, as a novel test bed for multiple robotic fish cooperation, can be applied to different types of complex tasks. More importantly, it provides a good platform to test and verify all kinds of algorithms and strategies for cooperation of multiple underwater mobile robots. We use two cooperative tasks as examples to heuristically demonstrate the performance of this platform.     

一种高效的动态几何图形迭代算法

图形迭代是动态几何软件中的重要功能,分析动态几何中图形迭代的实现原理,设计并实现一种高效的图形迭代算法,以解决原有算法效率低的问题,通过实验比较表明新算法具有良好运行效率。     

读者行为分析及图书馆移动服务平台构建

移动图书馆能够提供个性化和便捷的移动信息服务,具有广阔的发展前景。在对读者借阅记录进行关联规则分析的基础上,研发了图书馆移动服务平台。该平台采用C/S结构,基于MVC开发模式,采用Java语言完成系统开发,使用Android布局技术完成UI设计,读者可基于智能手机实时进行图书查询、续借、借阅证挂失和个性化图书推荐等,实现读者基于Android智能手机获取图书馆服务的功能。