共查询到20条相似文献,搜索用时 62 毫秒
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介绍了夏热冬冷地区的气候特点及影响,以及温湿度独立控制空调系统的基本原理和主要设备.并从节能角度分析夏热冬冷地区使用温湿度独立控制空调系统的优越性. 相似文献
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指出夏热冬冷地区空气源热泵系统应用的广泛性及应用痛点问题。建立了基于层次分析法(AHP)的空调冷热源优选模型,并以夏热冬冷地区某资源受限型能源站为例,对不同的空调冷热源方案进行优选,将定量与定性因素相结合进行决策分析,选出优选方案为空气源热泵耦合水源热泵+夏季辅助水冷电制冷系统方案。结果表明,AHP模型计算简便,能够客观、科学的对空调系统冷热源进行比选。 相似文献
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介绍了空气源.地板辐射采暖系统的原理、特点,并针对夏热冬冷地区气候特点,分析了空气源-地板辐射采暖系统在这一地区运用的优势、选型及存在问题,对夏热冬冷地区空气源.地板辐射采暖系统的应用有一定的指导意义. 相似文献
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The article describes a model representation of radar probing data in form of a mixture of background and target samples, which is the sum of two random variables with very different parameters. For model development we research the behavior of the central moments of the distribution mix without assuming the distribution law form. An example it is described the detection of the signal at the output of compression system of chirp ionosonde. 相似文献
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解决IP网QoS问题是目前通信领域的研究热点之一.虽然研究已经取得了一定的进展,但人们对于IP 网QoS本身的含义及相关的问题还有着不同的理解.本文将从IP网QoS的定义入手讨论相关的一些问题以及解决IP网QoS问题所做的各种努力. 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1968,56(6):1024-1032
Assuming that visual responses are due to the action of particles on the membrane of the visual cells, the stochastic variability of the response should be a function of the number of particles producing it. Quantitative predictions can be made with the aid of a model proposed in previous articles. It is found that responses produced in visual cells of Limulus by absorption of a single photon have the stochastic properties which would be expected if the response to one photon were brought about by 25 particles. It is concluded from this that the processes leading to visual responses produce multiplication of particles. The effects of temperature and of metabolic poisons suggest that these processes are of chemical nature. 相似文献
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对影响镍镀层内应力的因素做了介绍和分析,提出了对收缩应力的一种解释,提供了排除这些因素影响的方法,指出重视镀液的管理是减少各种影响内应力因素的主要办法。 相似文献
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罗晓羽 《信息技术与标准化》2008,(6):37-39
论述了推进电子行业标准制修订项目计划管理信息化的必要性.并提出了具体措施;详细介绍了电子行业标准制修订项目计划管理数据库的设计思路和实现方法.阐述了对后续工作的几点思考. 相似文献
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By means of exact conformal mapping method we have defined character of dependence of squares amounts of angular part of film
element on angled part dimension. We propose relations, approximating obtained dependence. Calculation results and experimental
researches of large-scale models are represented. 相似文献
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Moshrefzadeh R.S. Radcliffe M.D. Lee T.C. Mohapatra S.K. 《Lightwave Technology, Journal of》1992,10(4):420-425
The temperature dependence of refractive index of polymer films was determined for a number of slab waveguides by a grating coupling method. This dependence was examined as a function of parameters such as molecular weight and glass transition temperature of the polymer. Temperature-induced changes in N TE-N TM , N being the effective index, were studied systematically for different slab waveguide compositions. It is shown that with proper device design and choice of polymeric materials, thermal effects can be reduced 相似文献
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水的光学特性对光学成像质量有着重要的影响,水对光的吸收、散射作用可造成光在水介质传播中的衰减,本文就水的光学特性及其对水下光学成像质量的影响进行了分析,以为成像系统在水下的应用提供基础的理论依据。 相似文献