中国电信国际帐务摊分结算自动化系统

本文对中国电信国际帐务推分结算自动化系统工程的开发设计背景、总体结构及其系统组成与功能进行了详细的介绍,提供了一套完整的解决方案,对有关电信帐务推分结算统计等部门具有实际参考意义。     

某型雷达旁瓣抑制电路抗干扰分析

旁瓣对消是雷达抗有源干扰的有效方法。文章介绍了某型雷达旁瓣抑制电路的组成,分析了其基本的对消原理,并进行了计算机仿真,最后,给出了对几种有源压制干扰的对消结果。仿真结果表明,该旁瓣抑制电路具有很好的抗旁瓣干扰能力。     

一种专用网络管理平台的设计思路

文中分析了网络管理平台的现状、发展趋势和特点.根据笔者的实践从网络管理平台的体系结构与组成,模块之间的通信和二次开发工具等方面,给出了一种专用网络管理平台的设计思路;阐述了实现网络管理平台的3个关键技术:平台体系结构技术、网络管理协议适配技术和网管信息呈现技术关键技术.目前,该设计方案已经应用于多个项目中.     

Adaptive Online Voltage Scaling Scheme Based on the Nash Bargaining Solution

In an effort to reduce energy consumption, research into adaptive power management in real‐time systems has become widespread. In this paper, a novel dynamic voltage scaling scheme is proposed for multiprocessor systems. Based on the concept of the Nash bargaining solution, a processor's clock speed and supply voltage are dynamically adjusted to satisfy these conflicting performance metrics. In addition, the proposed algorithm is implemented to react adaptively to the current system conditions by using an adaptive online approach. Simulation results clearly indicate that the superior performance of the proposed scheme can strike the appropriate performance balance between contradictory requirements.     

部署QoS提高城域网承载多种业务的能力

本文结合青岛城域网的特点,讨论了部署QoS的相关问题,为下一步在城域网中承载多种业务提供了切合实际的参考。     

Evaluating impacts of fish stock enhancement and biodiversity conservation actions on the livelihoods of small‐scale fishers on the Beijiang River,China

Inappropriate development and overexploitation have seriously degraded aquatic resources in China. Stakeholders identified three fish stock enhancement and biodiversity conservation scenarios for the Beijiang River: S1, increased fish restocking; S2, no fishing season and habitat conservation; and S3, strict pollution control. Potential impacts of these actions on the livelihoods of fishers were evaluated using applied economic modeling. Baseline costs and benefits came from logbooks from 30 fishers and a survey of 90 households in three villages. The financial net benefit for a household was US$1583 (￥11,160) annually, representing a 142% and 387% return on capital and operating costs, respectively. Larger catches associated with S1 and S2 generated a net benefit of US$1651 and US$1822, respectively. Strict pollution control resulting in higher catches (+20%) and lower operating costs (?20%) would increase the net benefit by 15.9% to US$1835 annually. Pollution control would benefit other resource users and is a prerequisite for ecological restoration. Recommendations for Resource Managers

• Stringent pollution control measures are essential to conserve aquatic biodiversity and enhance the livelihoods of fishers but will require considerable public and private sector investment.
• Enhanced fish stocks in the Beijiang River could benefit poor livelihoods but may not be sufficient to lift households out of poverty, aged fishers require government assistance to diversify their livelihoods, access alternative urban employment, and survive with dignity.
• Adopting the economic modeling approach presented here could enable responsible authorities to simultaneously evaluate fish stock enhancement and biodiversity conservation options.
• Broader application of the approach presented here could help ensure small‐scale inland fisheries are managed sustainably and aquatic ecosystems are restored and protected by 2020, in line with Target 6 of the United Nations’ Convention on Biological Diversity Strategic Plan for Biodiversity.

     

Logging damage and injured tree mortality in tropical forest management

Using insights from the forest ecology literature, we analyze the effect of injured trees on stand composition and carbon stored in above‐ground biomass and the implications for forest management decisions. Results from a Faustmann model with data for a tropical forest on Kalimantan show that up to 50% of the basal area of the stand before harvest can consist of injured trees. Considering injured trees leads to an increase in the amount of carbon in above‐ground biomass of up to 165%. These effects are larger under reduced impact logging than under conventional logging. The effects on land expectation value and cutting cycle are relatively small. The results suggest that considering injured trees in models for tropical forest management is important for the correct assessment of the potential of financial programs to store carbon and conserve forest ecosystem services in managed tropical forests, such as reducing emissions from deforestation and forest degradation and payment for ecosystem services. Recommendations for Resource Managers

• Considering the role of injured trees is important for managing tropical forests
• These trees can cover up to 50% of basal area and contain more than 50% of the carbon stored in above‐ground biomass
• Reduced impact logging leads to a larger basal area of injured trees and more carbon stored in injured trees than conventional logging
• Injured trees play an important role when assessing the potential for carbon storage in the context of payment for forest ecosystem services.

     

半导体技术对无源电子元件发展的影响

经过半个世纪的发展,半导体技术不仅在制造功能强大的IC及各式各样的半导体分立器件方面,对社会发展起到不可估量的推动作用,而且对其他技术领域也产生了深刻的影响。在当前世界经济衰退浪潮的冲击下,无源电子元件领域借鉴、融合半导体技术以提高自身创新能力,加快产品升级是抵御冲击的值得关注的措施之一。     

高职院校教务管理系统的设计

本文以职业技术学院教务管理系统为研究对象,依据多年从事教务管理开发经验,以对目前教务管理信息系统分析？比较为基础,以教育的职业性？实践性和开放性为原则,提出了适合职业院校教务管理系统的总体设计思路,以适应职业院校的教学管理特点、为培养高素质技术技能型人才提供保障。     

偏振对DWDM系统内四波混频噪声的研究

使用了一种有效的能对四波混频(FWM)噪声对DWDM系统性能影响程度进行评估的仿真模型.通过对使用在线色散补偿与后补偿相结合的新型色散管理光纤链路进行仿真,看出每个周期跨距内的残余色散对FWM噪声有一定抑制作用,适当提高每个周期跨距内的残余色散有助于提高总的非线性容限和系统的整体性能.