小型热回收装置的可行性研究

通过回收排气中的余热对引入空调系统的新风进行预热或者预冷,可以减少空调系统的能耗。分析了不同装置的原理和性能特点以及适用性特征,初步探讨了热回收设备配置的合理性并举例说明了其节能效果,从而论证了应用的技术可行性。提出了一种简易的经济分析计算方法,评价了经济效果,论证了经济可行性。得出了小型热回收装置用于暖通空调系统可行的结论,并展望了乐观的应用前景。     

仓储式物流园规划设计探讨

物流园的建设,通过标准化设计使物流仓库单元模块化,减少了材料、构件和设备的种类,缩短了设计周期,同时保证了设计质量。通过采购集中化不但降低了采购价格,而且提高采购效率。通过施工装配化实现了大部分建筑构配件的工厂化生产和现场的"干作业"施工,减少了建筑施工对环境的不良影响,提高了建筑质量,同时缩短建造周期。通过运营灵活化,提高了仓库经营的灵活性和适应性,降低了仓库的空置率。使项目获得了较好的效益,值得在以后物流仓库的建设中进行借鉴和参考。     

土坡稳定分析通用条分法及其改进

本文简要总结了土坡稳定分析条分法的各种方法,提出了条分法的普遍平衡方程式。对于求解此平衡方程的摩根斯顿-普赖斯法进行了如下改进:1.指出了对多余未知数进行假定时应注意其边界值是固定的,不能任意假定。2.改进了数值计算方法,解决了有时遇到的收敛困难的问题。3.建立了在变分原理基础上的数值计算方法,找出受合理性条件控制的安全系数的上,下限,从而获得了安全系数的严格解。     

浅谈信息技术与小学数学教学的整合

科学技术的日新月异发展,推进了素质教育的进程,信息技术已经成为教学必备的手段,走进了课堂。信息技术与小学数学教学的整合激发了学习欲望,调动了学生学习的积极性,促进了学生自主探究学习,突出了教学重点难点,提高了课堂教学效率。本文对信息技术与小学数学教学的整合进行了阐述。     

多媒体-小学数学教学的得力助手

多媒体技术的发展使小学数学教学模式发生了根本性变化。课堂体现了学生的主体性原则,多媒体的应用丰富了教学内容,灵活了教学方式,点燃了学生思维的火花,提高了学生听课效率,有效解决了数学教学中的重难点,多媒体是小学数学教学的得力助手。     

主编心语北大核心

2016年4期讨论道＂世界是一系列固定画面的拼接,还是本身就在不断地流变,这真是两种思想方法＂。恰好,前些日子在电视上看到一个小制作电影,只记得片尾是一首河北儿歌：＂娃娃呢？上山了。山呢？雪盖了。雪呢？化水了。水呢？和泥了。泥呢？糊墙了。墙呢？猪拱了。……高粱呢？喜鹊叼了。喜鹊呢？飞——了!＂听起来,这里像是堆砌了一组毫无逻辑的混乱关系,是一系列无厘头的链接。其实,朴素的儿歌唱出的是中国人,不,     

昆山市城建档案馆召开年度各乡镇建管所档案管理员会议

2008年1月21上午,昆山市城建档案馆召开了全市乡镇建管所档案管理员会议。全市10个乡镇的建设档案管理员出席了会议。会议总结了2007年各乡镇档案管理工作并提出了对今后工作的意见。会上各镇建设档案管理员进行了相互交流。许奔原馆长主持了会议,将刚刚结束的对建管所档案管理工作的年度考评结果进行了通报,并对2008年的工作提出了要求。     

我们爱电梯

今天我们又迎来了中国国际电梯展的大会。30年电梯界的进步给我们带来了很多很多的财富，我们的电梯行业走向全世界，吸引了全世界很大的瞩目，使得是我们得到了更多的财富。我们有了技术，有了管理，有了制造，有了设计，有了好多好多中国电梯的世界第一。我们更有了很多朋友，在展览会上我们碰到了几十年的老朋友，还有更多的新朋友。我们电梯界的最大好处就是我们团结齐心，把我们的电梯事业搞上去。我相信长江后浪推前浪，一浪更比一浪高，现在的新人到处在蓬勃发展，新的技术也在很好的发展，我相信我们的后代一定会比我们做的更好。     

水利工程项目质量监督管理研究

如今,社会呈现出繁荣发展的趋势,人们的生活水平也有了较大提高。经济的发展带动了各行各业的不断进步,水利工程也不例外。国家高度重视水利工程项目的建设,并且投入了大量的资金,促进了水利工程项目的进一步发展。除此之外,水利工程项目的质量监督管理水平的提高也大大促进了企业的发展。本文详细的探究了水利工程项目质量监督管理,希望能够为项目的顺利开展尽一份绵薄之力。     

绿

刚过立冬，天气就冷了。枯黄的树叶随着萧萧的寒风，纷纷投身于大地的怀抱。远处的山清瘦了，近处的小草枯萎了，树枝好像赤裸的木偶，机械地扭动着自己的身躯，似乎在和昨天告别。满目的萧条，满目的枯黄，这引起了我无限的惆怅。失去了昨天的绿，失去了满心的爱。     

City in transition: Podgorica,Europe's youngest capital city

Podgorica, known as the “city under the mountain,” rests at the intersection of five riversand is Europe's youngest capital. Over a 2000-year-long history, Podgorica has experienced turbu-lence. The city has suffered conquests, wars, nearly complete destruction in WWII, associated with war-related conflicts in the 1990s, and gained its independence at the beginning of the 21st century. Today, Podgorica is a vibrant, dynamic, and rapidly growing city, with current developments that reflect the consequences of post-socialist economic, institutional, social, and cultural transition. In this case study, the development of the built environment of Podgorica is presented in six stages: Roman, Ottoman, Principality of Montenegro and Kingdom of Yugoslavia, socialist, transitional, and contemporary. The study shows the influence of each period in the development of the city and highlights two major challenges of present-day architecture, that is, growing into a modern-day metropolis and the challenge of juxtaposing contemporary Podgorica with Titograd and old Podgorica.     

Stormwater control measure (SCM) maintenance considerations to ensure designed functionality

Great investment is made in the design and installation of stormwater control measures (SCMs). Substantial research investment, too, is made to optimise the performance of SCMs. However, once installed, SCMs often suffer from lack of maintenance or even outright neglect. Key maintenance needs for wet ponds, constructed stormwater wetlands, bioretention, infiltration practices, permeable pavement, swales, and rainwater harvesting systems are reviewed with many tasks, such as the cleaning of pre-treatment areas and the preservation of infiltration surfaces, being common maintenance themes among SCMs. Consequences of lacking maintenance are illustrated (mainly insufficient function or failure). Probable reasons for neglect include insufficient communication, unclear responsibilities, lack of knowledge, financial barriers, and decentralised measures. In future designs and research, maintenance (and lack thereof) should be considered. Assessing the performance of SCMs conservatively and including safety factors may prevent consequences of under-maintenance; and requiring regular inspection may help to enforce sufficient maintenance.     

Comparison of photocatalysis and photolysis of malathion, isomalathion, malaoxon, and commercial malathion--products and toxicity studies

Malathion, one of the most widely applied insecticides, is still used in agriculture. There are many studies regarding its degradation under different experimental conditions, but few deal with its transformation products, i.e. malaoxon and isomalathion. Thus, malathion, malaoxon, isomalathion, and Radotion (one of its over 6000 commercial forms) were studied in terms of their degradation kinetics, identification of their transformation products, their toxicity, and their degree of mineralization, during UV photolysis (lambda = 254 nm) and TiO(2) photocatalysis (lambda = 355 nm). The degradation kinetics was similar for all four starting materials. More than 75% of theoretically expected sulfur in PS and P-S groups was oxidized after 240 min of photolysis and photocatalysis. On the other hand, less than 30% of stoichiometrically predicted amounts of phosphate was detected in the photolytic experiments, but more than 80% of expected phosphate was detected after photocatalytic treatment of all four organophosphorous materials. Several transformation products were identified by mass spectra of representative gas chromatographic peaks. Oxidation and isomerization were found as the main reactions of butenedioc acid diethyl esters and their analogs. The formation of malaoxon, isomalathion or trimethyl phosphate esters correlated well with the induced toxicity (inhibition of acetylcholinesterase), which was observed in photocatalysis of malathion and Radotion, and in photolysis of malaoxon and Radotion.     

Modeled infiltration rate distributions for U.S. housing

A set of 209 dwellings that represent 80% of U.S. housing stock is used to generate frequency distributions of residential infiltration rates. The set of homes is based on an analysis of the 1997 U.S. Department of Energy's Residential Energy Consumption Survey, which documents numerous housing characteristics including type, floor area, number of rooms, type of heating system, foundation type, and year of construction. The infiltration rate distributions are developed using the multizone network airflow model, CONTAM (CONTAMW 2.4 User Guide and Program Documentation, NISTIR 7251. National Institute of Standards and Technology.). In this work, 19 cities are selected to represent U.S. climatic conditions, and CONTAM simulations are performed for each of the 209 houses in these cities to calculate building air change rates for each hour over a year. Frequency distributions are then developed and presented nationally as well as based on house type and region. PRACTICAL IMPLICATIONS: These distributions will support indoor air quality, exposure, and energy analyses based on a truly representative collection of U.S. homes, which has previously not been possible. In addition, the methodology employed can be extended to other countries and other collections of buildings. For U.S.-specific analyses, these homes and their models, can be extended to include occupants, contaminant sources, and other building features to allow a wide range of studies to address other ventilation and indoor air quality issues.     

广州人民公园使用状况评价报告

从使用者的角度出发,采用相关文献收集、现场观察、绘制草图、分析功能分区、收集管理部门的信息、记录使用者的活动和痕迹、对典型使用者进行访谈、数据整理等方法,对人民公园的使用做出系统评价,包括位置、尺度、视觉、使用和活动、微气候、入口和边界、交通、种植材料、场地家具等,从中归纳总结出广州人民公园改建使用后的状况.并在分析使用状况的基础上找出公园存在的问题和矛盾,就每个问题提出适当的设计或管理的改进意见并提交意向设计方案.     

经典重温：贝聿铭大师建筑创作思想浅析——以苏州博物馆新馆为例

通过丰富的图例,从场所精神、创新、细节等方面对贝聿铭先生设计的苏州博物馆新馆各阶段设计成果的对比分析,结合相关的文字资料,探究了先生的创作思想和历程,并结合建筑建成后的实际效果,从布局、空间、造型、园林等方面分析作品,分享大师成熟的设计思想和高超的设计技巧。     

Aspects of rock permeability

Effective evaluation of rock permeability is required in different energy, engineering and environmental projects. Although much research has been conducted on rock permeability, it is still one of the most difficult tasks for practicing rock engineers to accurately determine rock permeability. Based on a comprehensive literature review, this paper outlines the key aspects of rock permeability by presenting the representative values of the permeability of different rocks, describing the empirical and semi-empirical correlations for estimating the permeability of rocks, and discussing the main factors affecting the permeability of rocks. The factors discussed include stress, depth, temperature, and discontinuity intensity and aperture. This paper also highlights the scale effect on rock permeability, interconnectivity of discontinuities, and anisotropy of rock permeability. This paper provides the fundamental and essential information required for effective evaluation of rock permeability.     

现代城市纪念馆设计之研究——以湖州烈士陵园暨钱壮飞纪念馆为例

近二十年来,随着我国国力的迅猛发展,各类纪念馆的兴建若群星闪耀,如名人纪念馆、历史事件纪念馆、文化遗产纪念馆、工业产品纪念馆等。其中名人纪念馆无论是在数量上、质量上、还是规模上,都占有着不可或缺的重要地位。其设计方法直接关系到纪念馆的精神表达、与时俱进、感悟主题、大众记忆的传承、续语、转化和拓展。作者力求从城市设计的角度,多方位地探寻现代城市纪念馆设计的方法与途径。     

Privacy,modesty, hospitality,and the design of Muslim homes: A literature review

Traditional Islamic teachings and traditions involve guidelines that have direct applications in the domestic sphere. The principles of privacy, modesty, and hospitality are central to these guidelines; each principle has a significant effect on the design of Muslim homes, as well as on the organization of space and domestic behaviors within each home. This paper reviews literature on the privacy, modesty, and hospitality within Muslim homes. Nineteen publications from 1986 to 2013 were selected and analyzed for content related to the meaning of privacy, modesty, and hospitality in Islam and the design of Muslim homes. Despite the commonly shared guidelines for observing privacy, modesty, and hospitality within each home, Muslims living in different countries are influenced by cultural factors that operate within their country of residence. These factors help to shape the architectural styles and use of space within Muslim homes in different ways. Awareness of the multifactorial nature of the influences on the Muslim perception of home and the use of space is necessary for architects, building designers, engineers, and builders to be properly equipped to meet the needs of clients.     

预应力锚索应力测量误差的试验研究与对策

了解锚索应力状态时,锚力计示值与千斤顶示值之间普遍存在着较严重的不匹配现象,通过室内外试验和工程数据分析的汇总分析,得到这种不匹配现象主要由仪器设备使用错误及数据错误、测量仪器误差、构件误差及安装误差等施工误差、锚索张拉及锁定时应力损失等原因造成。把千斤顶示值和锚力计示值有机结合,通过现场试验建立两者示值之间的对应关系,能够对锚索的真实应力状况有个较为全面的、准确的了解。