中国公众环境意识的现状与影响因素

对CGSS（2013）数据分析发现,中国公众存在环境问题认知率高、环保知识水平低、环境污染 程度评价高、环保工作满意度低、环保行动水平低的特点,且环境认知、环保知识、环境污染评价省际 差异较大。检验了性别、年龄、受教育程度、收入、政治面貌、城乡差别6 个因素对环境意识的影响作用, 归纳得出环境意识5 个维度的低得分群体。据此提出了通过“议程设置”提高公众环保参与度,发挥政 府组织公信力开展公众环保活动等改进公众环境意识的建议,以期为我国开展公众环保知识普及与环境 保护教育工作决策提供参考。     

现代设计方法在机电产品中的应用

现代设计方法有:并行设计、虚拟设计、绿色设计、可靠性设计、智能优化设计,本文着重介绍了其在现代机电产品设计中的应用。希望能够为机电产品研制、设计者以及机电产品企业决策者提供一定的借鉴作用。     

可靠性强化试验技术在机电产品中的应用研究

机电产品是军用、民用装备的重要的组成部分,如何快速地缩短该装备的研制周期、提升其整体可靠性水平,是现代装备研制过程中急需解决的问题,可靠性强化试验技术可在这方面发挥重要的推动作用.阐述了如何开展机电产品的可靠性强化试验的方法,提出了机电产品可靠性强化试验三步走的思路,并制定了机电产品相应的可靠性强化试验方案与试验流程.结果表明,该方法能够快速、高效地暴露机电产品的设计和工艺缺陷,以及薄弱环节,对于提高机电产品的可靠性具有一定的参考价值.     

雷达结构虚拟产品研发技术研究

针对雷达等机电产品的基础共性问题,以其机械系统为核心,进行虚拟产品研发技术研究,提出了复杂机电产品虚拟装配、自动化仿真、CAE计算结果可视化发布的解决方法,突破了基于人自然操作的交互式虚拟装配、数字样机高级仿真、CAE计算结果可视化等关键技术,解决了基于人自然操作的自动装配、基于可配置模板的自动仿真以及CAE计算结果的重构等难题,实现了对雷达等机电产品研发过程中基于数字样机技术的虚拟产品自动化装配设计、自动化仿真以及CAE计算结果的发布,形成了雷达虚拟产品集成研发平台。     

媒体传播视阈下如何提高环境保护质量

环境污染和生态破坏严重制约了我国经济社会的发展,而当前众多媒体如何积极有效地发挥科学传播的作用,以实现社会大众了解和参与到环境保护中去,媒体的舆论监督角色就显得尤为重要.本文结合我国环境新闻的发展历程,从当前我国环境新闻报道中存在的问题出发,来探讨多种媒介条件下如何有效提高社会公众环保意识,并就新闻学、传播学的价值内涵来完善环境保护质量的方法和途径加以探讨.     

探究建筑给排水设计中的节能减排设计

给排水设计是建筑工程设计中的一个关键环节,近几年我资源的紧缺以及环境的恶化,使人们的节能减排意识得到了进一步提高。建筑给排水近几年得到了社会各界人世的高度重视,需要在确保给排水正常运行的基础上最大程度降低对水资源的浪费,从而促进我国建筑行业的发展,减少能源浪费。     

安森美半导体高效电源管理技术助力节能环保

当今社会,能源危机和环境污染已经成为世界各国共同面临的两大难题。随着人们环保和节能意识的增强,低功耗设计越来越受到厂商、消费者和各国政府的关注,高能效的电源设计将成为市场的主导。并且,电源设计周期加快、低待机能耗、高能效以及减小占位面积的要求正在改变传统的电源设计方法,推动电源管理设计的创新。无论是客观环境,还是人们的主观意识上,"环保节能型"设计已是电源管理市场发展的大趋势。     

浅谈我国突发环境事件应急管理工作

当下,我国社会经济快速发展,突发性环境污染事件也随之频发。突发环境事件往往具有突发性、公共性、高危性等特点,通过加强突发环境事件应急管理工作,增强公众环境风险防范意识,提高环境应急人员的预警及应急能力来减轻其造成的危害具有非常重要的意义。     

机电产品故障模式及可靠性特点分析

机电产品广泛地应用在各装备系统中,它的可靠性水平直接影响着装备工作任务的完成度。首先,按照功能类型对机电产品进行了分类并对其工作载荷进行了分析;然后,针对不同机电产品类别全面开展了故障模式分析,并结合30项机电产品的故障信息调研统计结果,总结了典型机电产品的故障模式特点和使用过程中存在的主要问题;最后,从可靠性角度出发,分析了机电产品的可靠性特点和目前可靠性分析存在的问题,为满足机电产品的可靠性分析与设计优化的需要,推荐采用系统工程法通过建立数字化仿真模型进行可靠性分析。     

探索机械设计制造及其自动化技术未来出路

机械设计制造及其自动化是一门随着社会进步出现的新兴学科,其综合了多种技术,主要是从设计、制造、运行以及控制等环节对各种工业机械装备与机电产品进行研究的综合技术学科,在我国国民经济建设中起到了重要的作用.本文主要就是对机械设计制造及其自动化进行分析,首先指出了机械设计制造及其自动化的特征,并分析了机械设计制造及其自动化在未来的发展方向.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks