Research on the Impact of Green Roof on Indoor Human Thermal Comfort

An experiment is conducted on the impact of green roof on Indoor Human Thermal Comfort. The result shows that the temperatures of the building walls and indoor air fall for certain degrees, and that is good. But unfortunately, the relative humidity of the indoor air rises. Totally speaking, the whole effect is changed from feeling warm to basically acceptable. When the requirement of the indoor environment is high, it is impossible to be satisfied by exploiting green roof solely, other methods, such as using night ventilation, electric fans or air-conditioners, should be taken at the same time.     

云贵高原干季室内热环境参数关系研究

基于我国住宅建筑室内热环境研究的不足,以曲靖师范学院一自然通风房间为对象,对其室内温度、湿度、风速、墙面温度、地板温度、天花板温度、室外环境温度进行了为期半年的实地测试,对室内空气平均温度、平均辐射温度、PMV(predicted mean vote)值和PPD(predicted percentage of dissatisfaction)值进行了计算.为便于快捷预测和调控云贵高原干季室内热环境,利用线性回归分析法对室内外主要参数间的关系进行了讨论,获得了一些相关性较好的回归方程,在相似气候下对热环境预测和设计可供参考.     

花生病毒病研究──Ⅰ．花生矮花叶病的病原鉴定

１９８７～１９９３年期间，在河北、河南、山东、辽宁、北京４省１市先后采集花生矮花叶病及斑驳病标样２９０个，冷干保存，经用鉴别寄主测定、间接ＥＬＩＳＡ、电镜观察证明，引起北方花生产区花生矮花叶病的病原是花生条纹病毒（轻斑驳病毒）（ＰＳＴＶ原ＰＭＭＶ）、花生矮化病毒（ＰＳＶ）、花生黄瓜花叶病毒（ＣＭＶ—ＣＡ）、花生斑驳病毒（ＰＭＶ）其发生频率依次为４７％，４１．３％，３３．３％，３．３％．在我国除台湾省外，在北方花生产区第１次报道ＰＭＶ的发生。     

猪舍热舒适性评价及夏季湿帘作用下的CFD模拟

影响猪舍热舒适性的因素包括温度、湿度、风速和热辐射,猪体的热舒适感是由这些因素以及猪体新陈代谢综合作用的结果。传统温湿度指标难以精确地表达猪体的热舒适感。在人体平均预测投票（predicted mean vote,PMV）指标的基础上用类比方法提出了猪体PMV指标。采用计算流体动力学（computational fluid dynamics,CFD）对夏季湿帘作用下的猪舍建立温湿度模型场,并在此基础上计算得到猪体PMV场仿真模型,将模型数据与无线传感器网络的数据进行对比,误差波动在6%以下。夏季湿帘作用下,模拟猪舍内部温度场在整体上降低了4 ℃左右,风速呈现出两边高中间低,靠近墙壁的地方和猪舍角落的地方呈现出一定面积的气流死区,猪体PMV指标在湿帘作用下的波动范围在-0.5~+0.5之间,属于舒适的指标范围内。该方法可以获得猪舍生活区猪体热舒适感的精确场分布情况,为猪舍环境控制的优化提供强有力的理论依据。     

云贵高原干季室内热环境参数关系研究

基于我国住宅建筑室内熟环境研究的不足,以曲靖师范学院一自然通风房间为对象,对其室内温度、湿度、风速、墙面温度、地板温度、天花板温度、室外环境温度进行了为期半年的实地测试,对室内空气平均温度、平均辐射温度、PMV(preclicted mean vote)值和PPD(predictecl percentage of djssatisfaction)值进行了计算.为便于快捷预测和调控云贵高原干季室内热环境,利用线性回归分析法对室内外主要参数间的关系进行了讨论,获得了一些相关性较好的回归方程,在相似气候下对热环境预测和设计可供参考.     

Application and Simulation of HVAC Energy saving ControlSystem by Least Enthalpy Difference

In the process of air conditioning, not only the thermal comfort but also energy saving should be considered. A method, which combines a least enthalpy difference（LED） and mixing air ratio based on the theory of enthalpy, can help to approach to comfortable zone for the air before coming into air handling unit (AHU). Then several mathematic equations of mixing process were derived based on laws of conservation of mass and energy. Eventually, the models of HVAC were established under SIMULINK environment. And the control strategies are validated in the aspects of improving comfortable effect and saving energy. It is found that LED based PID controller can achieve the requirements of better thermal comfort and energy efficiency.     

Digoxigenin(DIG)标记RNA探针检测侵染花生的Potyviruses

以花生条纹病毒(PStV)和花生斑驳病毒(PMV)克隆cDNA为模板,体外转录合成Digo-xgenin(DIG)标记PStV—I_9、PStV-I_(131)、PStV—I_(57-7)和PMV—A_(15)四种RNA探针。在点杂交反应中,PStV—I_9RNA探针能检测出0.25ng提纯PStV和花生病汁液62500倍稀释液中PStV。PMV—A_(16)RNA探针能检测到0.67ng提纯PMV和菜豆病汁液5120倍稀释液中PMV。两种病毒RNA探针均有高度特异性。PStV—I_(57-7)和PStV—I_(131)两种RNA探针具有与PStV—I_9RNA探针相同敏感性,但特异性稍差。     

堆型艾美尔球虫cSZ1基因在PMV361整合载体的构建

目的：构建PMV361-cSZ1载体,研制鸡球虫疫苗。方法：根据堆型艾美尔球虫基因序列,设计合成引物,扩增cSZ1基因,在pMD18-T Simple Vector表达后提取质粒,经过PCR鉴定和酶切鉴定。将cSZ1基因片段和PMV361载体由限制性内切酶PvuⅡ和ClaI双酶切后,进行DNA连接。结果：经PT-PCR...     

Discussion on the Application Range of the PMV Equation

With the attention to the comfort degree of living environment, the phenomenon of making use of the PMV -PPD index within the ISO7730 standard to evaluate the indoor thermal comfort degree is more and more widespread. Many papers about indoor thermal environment are based on the PMV - PPD index as the reference or basis to research and analyze. But few people understand and pay attention to the application range of the PMV - PPD index. So some people misuse and abuse the PMV index and deduce some inaccurate conclusions. In this thesis, based on the analysis of the process of deducing PMV equation, the phenomenon that PMV index is different from the fact in the high temperature condition is explained; furthermore the application range of the PMV equation is confirmed. So to obtain the scientific and reasonable evaluation and conclusion in the process of research of the thermal comfort degree can be ensured.     

Enhancing the thermal comfort on urban level in a desert area: Case study of Dubai,United Arab Emirates

The urbanisation of deserts in Dubai is one way in which this city can expand and explore its full potential. In this piece of research, a case study of the Dubai International Academic City was used as a basis from which to study the importance of planning and orientation of projects in open, unpopulated land. It demonstrates the various alternatives for project orientation relative to the sun and wind, its effects on temperature and wind readings and consequently on outdoor thermal comfort levels. ENVI-met was used to simulate various scenarios generated from the existing base case in both summer and winter. The orientation which best promoted and allowed for higher wind flow through the project was found to record the best outdoor predicted mean vote levels, approaching a neutral state. The findings of this research may be used for setting up regulations regarding the planning of desert areas in Dubai on the basis of early assessment of designs.