通风的

Evaluates the zero-equation model provided by Chen based on CFD simulation of three typical airflows(forced convection,mixed convection and natural convection)in air-conditioned and ventilated rooms.

为了对Chen提出的零方程模型进行评价，研究了三种典型的空调通风房间气流组织工况(强迫对流、混合对流和自然对流)，同时采用Prandtl的混合长度理论和双方程K-ε湍流模型的计算结果作为比较。

This thesis will discuss how to prevent natural-draft counter-flow wet cooling tower from freezing in winter, and compute the areas of draught deflectors.

本文针对自然通风逆流式冷却塔冬季运行时的防冻处理，及预防结冰所应采取的措施进行研究和计算，提出以增加或减少挡风板的高度来控制出塔水温的方法，并对其进行计算分析。

This mean that the synthetic pyrethroid powder could prevent ticks at field to climb up dog's body availably. Canine rooms and canine playground were the location whitch hiding a great deal of canine ticks. 2% dichlorvos liquor was used to scatter at the wall, floor of canine room and the canine bed,then the door and window were closed for fuming. The door and window were opened after 4 hours and the room were washed downright.

犬舍灭蜱用浓度为2%的敌敌畏溶液喷洒犬舍的墙壁、地面、和犬床，然后关严犬舍门窗进行熏杀，4h后打开犬舍门窗进行通风排气，并用清水彻底冲洗犬舍，最后在犬舍每面墙约与犬身同高的部分和墙与墙、墙与地面的交界处用合成除虫菊药粉笔画上数道连续并排的粉线。

Since ventilation and evaporative cooling are the primary means for temperature adjustment in the duck house, a relationship for the traveling distance of water particles under various thermal environment was first established. This allows for the evaluation of efficiency of foggers for evaporative cooling. The relationship was then incorporated into a mathematical model based on the energy and mass conservation principle to simulate the transient change of outdoor temperature and humidity.

由於通风与喷雾降温为调节半开放式鸭舍内温度的主要方法，首先我们推导出雾粒在完全蒸发前移动距离与热环境条件的方程式，以计算於不同热环境条件下，不同大小雾粒的蒸发比率，从而评估喷雾降温的效率；次而利用质能平衡原理建立鸭舍内喷雾降温热环境模式，以计算及预测鸭舍内受外界热环境影响而产生的温湿度变化。

Dezhou FRP factory adheres to the quality of products to survive, to technological progress and development of strategic thinking, actively adopt modern management methods and means, now have with the industry's most advanced production equipment, testing equipment, and office automation facilities, the establishment of sound quality assurance system and after-sales service network, and through and more than 20 tertiary institutions, research departments together to form a glass fiber reinforced plastic fans, cooling towers, ventilation pipes, laboratory equipment, glass fiber reinforced plastic shell car car hood and the end of the central air-conditioning equipment-oriented products, Northwest's largest FRP design, production, processing, testing base, the product is widely used in scientific research, transportation, factories and mines and other departments.

德州市玻璃钢制品总厂，坚持以产品质量求生存，以技术进步求发展的战略思想，积极采用现代化的管理方法和手段，现在拥有同行业最先进的生产设备、检测仪器及办公自动化设施，建立健全了质量保证体系和售后服务网络，并且通过和20多家大专院校、科研部门共同协作，形成了以玻璃钢风机、冷却塔、通风管道、实验室设备、玻璃钢车壳车罩和中央空调末端设备为主导产品的鲁西北最大的玻璃钢设计、生产、加工、测试基地，产品广泛用于科研、交通、厂矿企业等部门。

The air intake boxes, which also are molded with our resin infusion process, are fitted with a Delta T engineroom ventilation system with thermostatically controlled supply and discharge fans for optimum fresh air circulation, plus water intrusion suppression to keep the space clean, dry and most importantly, salt free.

空气进气箱，其中也有塑造与我们的树脂灌注过程中，装有1吨三角洲engineroom通风系统与thermostatically控制供应和放电的球迷最佳的新鲜空气流通，加上水入侵镇压，以保持空间清洁，干燥及最重要的是，盐免费的。

The design process is: to select the best process, drawing process maps, after the material of the process, heat is calculated to select the required specifications for production equipment models, a comprehensive natural conditions, transport, economic and other factors in selecting suitable areas The building addresses, format of the workshop construction, equipment to deal with layout, rendering plant layout, equipment flow chart, response equipment, such as design and graphics, the last of the water, electricity, gas and other public works to estimate the amount of ventilation, heating , environmental protection, fire prevention, safety and health content on to complete the preliminary design of the workshop.

本次设计的过程是：选择最佳工艺流程，绘制工艺流程图，之后对各工序物料、热量进行计算，选定所需生产设备规格型号，综合自然条件，交通，经济等个方面因素选择合适的建厂地址，对车间建筑形式，设备布置进行处理，绘制车间布置图、设备流程图，反应设备的设计与绘图等，最后对水、电、汽等公用工程用量进行估算，对通风、采暖、环保、防火、安全卫生等内容进行阐述，从而完成了车间的初步设计。

The design basis and methods are discussed in the areas such as the use of energy, the conservancy and seal of heat, natural ventilation, the use of mid-water, the afforestation, and the materials of ecological architecture. All these are considered on the basis of the elemental relation between architecture and natural environment in order to make people have a deeper understanding and grasping of such a design.

本文试图从建筑与自然环境的基本联系入手，从能源利用、保温隔热、遮阳、自然采光、自然通风、中水利用、绿化、生态建材等方面阐述生态建筑的设计原理与设计方法，使我们对生态建筑的设计有深入的了解和掌握。

Based on household activity questionnaires and actual analytical concentrations, the main influencing factors accounted for gaseous PAHs in indoor air, identified by multifactor analysis of variance, include cigarette smoking, use of moth ball, intensity of draft, cuisine frequency and built age.

根据家庭调查问卷和实测的浓度水平，多因子方差分析的结果显示，北京城、近郊区民居室内气态PAHs的浓度和组分谱的主要影响因素包括吸烟、卫生球使用、居室通风强度、日烹调次数和民居建成时间。

Three rooms with natural ventilation and eleven streets (includes two streets which the viaducts crossed) are selected as sampling points, CO concentration and aerosol particle number concentration are employed as the test parameters for gaseous and particulate pollutants, respectively.

本文分别选择了上海市和西安市的三个自然通风房间和十一条街道(包括两条高架桥穿越的街道)作为典型测试点，并分别以CO浓度和气溶胶粒子数浓度作为测定参数，对室内外污染物浓度间的关系进行了系统的实验测试和详细的理论研究。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐