廊坊市某公寓集中热水供应系统设计探讨

针对太阳能热水系统应用技术状况,从建筑物的使用要求、物业管理等方面,比较了两种集中热水系统的供水方案;结果表明集中集热-分户储热-分户加热太阳能热水系统是公寓合理的热水供应形式;最后分析了公寓采用集中热水供应系统存在的问题及解决措施.     

合肥某小区集中热水工程太阳能改造可行性分析

太阳能取之不尽,用之不竭,是最清洁的一种能源.倡导低碳环保的生活就应该充分利用太阳能资源.目前市政供热集中供应住宅小区的生活热水虽然使用上便捷、舒适,但在非采暖季造成市政蒸汽管网管损严重,运营公司连年亏损.如何利用太阳能在非采暖季替代市政集中供生活热水,节约社会能源,该文从日照特点和设计运行角度探讨利用太阳能在合肥民用建筑集中热水应用方面的发展潜力.     

太阳能热泵生活热水供应装置的开发与研究

结合实验室条件,开发了适合北方地区双循环式太阳能辅助热泵热水装置,系统以消耗少量电能为代价,将太阳辐射能提高温度后用于生活热水的生产,具有节能,环保,布置灵活等特点,适用于局部和集中热水供应.课题组进行了供应生活热水的实验,测得能效比为2.5∶1.     

某公寓热水供应方案的比选

太阳能作为一种新能源,是一种清洁无污染的可再生能源。太阳能热水系统是以吸收太阳辐射能为热源,将太阳能转为热能以达到加热水的目的的整套装置,包括太阳能集热装置、储热装置、循环管路装置等。由于太阳能热水系统在全年运行中受天气的影响很大,其独立应用存在间歇性、不稳定性和地区差异性,在太阳能应用中除利用集热器将太阳能转换成热能外,应采取热水保障系统（辅助加热系统）和储热措施来确保太阳能热水系统全天候稳定供应热水。     

多层建筑太阳能热水系统的设计

能源和环境是制约国民经济持续增长和人民生活质量稳步提高的主要问题之一 ,新能源的开发和利用是解决上述问题的重要途径 ,其中太阳能作为一种新型能源应用非常广泛 ,但目前在我国太阳能的利用集中在小型家用热水系统上 ,已经不能够满足发展的需要 笔者结合镇江市“阳光世纪花园”住宅太阳能热水系统的设计 ,论述了多层建筑太阳能热水系统的工作原理和设计方法 ,提出了多层建筑太阳能热水系统设计的一般思路 ,为新型舒适性住宅采用节能型热水系统提供了设计的基础依据     

多层建筑太阳能热水系统的设计

能源和环境是制约国民经济持续增长和人民生活质量稳步提高的主要问题之一，新能源的开发和利用是解决上述问题的重要途径，其中太阳能作为一种新型能源应用非常广泛，但目前在我国太阳能的利用集中在小型家用热水系统中，已经不能满足发展的需要，笔者结合镇江市“阳光世纪花园”住宅太阳能热水系统的设计，论述了多层建筑太阳能热水系统的工作原理和设计方法，提出了多层建筑太阳能热水系统设计的一般思路，为新型舒适性住宅采用节能型热水系统提供了设计的基础依据。     

兰州太阳能热水系统使用空气源热泵为辅助热源的项目解析

依托兰州有色招待所生活热水节能改造项目,应用了太阳能集热器和空气源热泵热水机组结合的热水供应系统,通过对比分析太阳能热水系统辅助热源,得出利用空气源热泵作为太阳能热水系统的辅助热源在兰州地区有着很好的经济性,为此类项目在兰州的公共建筑上应用有借鉴作用,推广该类项目可获得显著的效益。     

高层住宅小区集中热水系统设计探讨

住宅小区的热水系统供应方式根据热源的情况分为分散式和集中式。集中热水供应系统热源的选择应通过技术经济比较，优先选用稳定可靠的余热、废热、地热，其次选用太阳能、空气源热泵、地下水源热泵、热力管网、区域性锅炉房等。结合高层住宅小区集中热水系统设计的特点，从热水系统的设置、室内外管网布置、换热站的确定、储热量的计算、户内管道布置、热水计量问题、管网损失等方面，讨论这类设计中应注意的问题，为类似工程设计提供设计思路。     

高原地区太阳能热水系统开发利用探析

通过与青海华园新能源应用技术开发有限公司的合作,为核工业"221局"西宁管理处居民小区研发一种配备辅助热源的太阳能热水系统,通过大面积太阳能集热器采集热水,为其提供集热洗浴一体化的全方位热水供应.系统工作原理、实施方案及节能效益得以分析,可高效、安全、环保、节能实现全天候自动运行,以便满足生态节能建筑发展的需要.     

太阳能热水供应系统的经济分析

提出了用采暖系统作为太阳能热水供应系统的补充热源的设想 ,并利用费用年值法计算了这种系统在不同地区所需费用 ,以及在同一地区采用不同能源的热水供应系统所需费用 ,并进行比较。结果表明 ,利用采暖系统作为补充热源的太阳能热水供应系统的经济性较好     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that