查询词典 ventilation wall

Based on basic theory of elastic wave propagation, wave equation forpropagation of elastic wave in 2 dimension vertical inhomogeneous mediumof similar concrete cutoff wall model is developed. 2 dimension elastic sheetof concrete cutoff wall is established to research law and energy distributionrelations between propagation, attenuation, reflection and transmission ofelastic wave in concrete cutoff wall; Based on the concept of resolution, thecontent of vertical reflection method used to inspect concrete cutoff wallresolution is raised and factors will have influences on resolution are analyzed,expression of defective layer composite reflection factor and detectabledefective layer maximum thickness are developed; Relations between allsteps of sampling system of vertical reflection are build, the influence ofcentrum characteristics and receiving sensor on testing results are analyzed,therefore parameter requirements for testing instrument and parameter selection principle of collected parameters are raised.

2从弹性波传播的基本理论研究出发，推导了弹性波在类似混凝土防渗墙模型的二维垂向不均匀介质中传播的波动方程式；建立了混凝土防渗墙二维弹性薄板模型，研究弹性波在混凝土防渗墙中的传播、衰减、反射、透射规律及能量分配关系；从分辨率的概念出发，提出了垂直反射法检测混凝土防渗墙分辨率的内涵，对影响分辨率的因素进行了分析，推导出了缺陷层复合反射系数、可检测缺陷层极限厚度的表达式；建立了垂直反射法采样系统各环节之间的关系，研究分析了震源特性、接收传感器对测试结果的影响，提出了对测试仪器参数的要求及采集参数的选择原则。

In addition, the blank holding force that is required to avoid wrinkle and rupture during conical part deep drawing is researched. The necessity of reasonable blank holding force in pressing is expounded. From the view of mechanical analysis, the wrinkle critical condition of side-wall is derived for the first time by the stress state of side-wall, the main deformation region on blank. According to the critical condition of plastic instability for flange, side--wall, corner of punch on blank, The blank holding force in conical part deep drawing is divided into four different regions within its forming figure. The basic principle of reasonable blank holding force during stamping is summarized and provided. The mathematical model of reasonable blank holding force that avoids the wrinkle and rupture is established and verified by the finite element numerical simulation and the grid experiment method. The result shows that it is accurate and reliable.

此外，本文还研究了圆锥形件拉深成形过程中，随着拉深变形过程的进行，毛坯为避免产生起皱、破坏缺陷而对压边力的需求情况，阐明了圆锥形件拉深成形过程中压边力合理变化的必要性；由毛坯主要变形区悬空锥壁部分的受力变形情况，从力学分析的角度，首次推导得出了圆锥形零件悬空锥壁起皱失稳的临界条件；并根据主要变形区法兰、悬空锥壁及凸模圆角部分的塑性失稳临界条件，在其成形范围图中，将圆锥形件成形过程中的压边力划分为四个区域；总结并提出了圆锥形件成形过程中压边力合理变化的基本原则；建立了防止起皱、破坏缺陷产生的压边力合理变化的数学模式，并得到了有限元数值模拟及网格实验法的验证，证实了理论分析结果的正确性和可靠性。

High contrast beween shadow and light can create confusion and disorientating patterns for those with failing vision.For this reason,all interior spaces should be lit at a consistent and even level,floor to ceoling and wall to wall.Older people seldom walk down the center of a corridor,according to Dupuy,because they're afraid of falling."If the wall is not illuminated properly,that does not give them a lot of confidence,"he says.

高对比度beween阴影和轻，可制造混乱和disorientating模式，为有需要的人士未能vision.for这个原因，所有的内部空间应该点燃在一个一致的，甚至一级，请ceoling和围墙把wall.older人们很少步行中心一条走廊，根据dupuy ，因为他们怕落入&，如果这堵墙是不是发亮得当，不给他们一个很大的信心，&他说。

The results of analysis show that the shock detached distance computed by two temperature model or three temperature compare well with the experiment data, and the heat transfer rate is highest for one temperature model with non-catalytic wall, and lowest for equilibrium gas model, and the heat transfer rate for perfect gas model is between the non-catalytic wall and fully catalytic wall .

结果表明：采用两温度非平衡气体模型计算的激波脱体距离更接近实验情况；采用平衡气体模型计算的壁面热流最高，一温度非平衡气体模型完全非催化的壁面热流最低，而完全气体模型的壁面热流在两者之间。

CO2 room, E/R, A/C room, emergency generator room and bilge pipe tunnel are to be provided with mechanical ventilation.

二氧化碳室、机舱、空调机室、应急发电机室、舱底管弄均设置机械通风。

The bamboo is exempted from pesticide contamination because it can produce negative ion itself and has the insect-preventive and anti-microbial functions, which can protect it from diseases and insect damage. Moreover, the bamboo fiber is produced by high technology without the addition of chemical additive, and it is characterized by various properties such as natural antibiosis, bacteriostasis, anti acarid, deodorization, anti-ultraviolet, and excellent ventilation, instant water absorptivity, strong wearing resistance, outstanding dyeing property and beautiful appearance, etc.

因为竹子自身能产生负离-和防虫抗菌作用，生长过程中因无病-虫害而免除了农药的污染；并且竹纤-在制造全过程中采用高科技手段，不-任何化学添加剂，并具有天然抗菌、-抑菌、防螨、防臭和抗紫外线作用，-有良好的透气性、瞬间吸水性、较强-耐磨性、良好的染色性、美观性等优-良的特性。

It presents a simple, convenient assessment method for the check and acceptance of the quality of a ventilation system for thequality quality normalization and mo...

为煤炭工业的质量标准化和煤矿现代化建设中通风系统质量的验收检查提供了一种简便的评价方法。

I had the same problem with an Acer Aspire 5672 on XP but it turned out to be a ventilation problem.

我有同样的问题与宏基渴望5672在XP上，但它演变成一场通风问题。

The company also manufactures fiberglass tanks, tank, FRP, FRP / PVC, FRP / PP pipes, FRP tanks, acid mist purification tower, all kinds of glass fiber reinforced plastic ventilation pipes, a variety of centrifugal fans, axial fan, fan housing machine, wet dust and a glass fiber reinforced plastic trays, etc., and based on user requirements Design a variety of glass fiber reinforced plastic products.

公司还生产玻璃钢槽车、贮罐、FRP、FRP/PVC、FRP/PP管道，玻璃钢水箱，酸雾气净化塔，各种玻璃钢通风管道，各种离心风机、轴流风机、屋机风机、湿式除尘器及玻璃钢桥架等，并根据用户要求设计制作各种玻璃钢产品。

Second, it's important to have the adequate ventilation in the house.

第二，在房子里有充分的通风是非常重要的。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。