| 1. | The average wind speed in most urban areas throughout the world is only 5 meters per second
但全球大部份城市的平均风速只有每秒5米。 |
| 2. | ( 4 ) wind speed has decreased evidently in the whole china , especially in winter and western northwest china , where average wind speed decreased by 29 % or so , comparing the wind speed in 1990 ' s and in 1950 ' s
( 4 )近50年，中国风速减小的趋势非常显著，全国平均风速约减小了16 ，减小最显著的西北西部，约29 。四季风速均大幅减小，尤其在冬、春季节。 |
| 3. | ( 3 ) for parameterization of the sensible heat , the positively correlation between surface temperature and bulk transfer coefficient lead to a positive additional sub - scale flux . its magnitude is determined by the grid average roughness and average wind velocity on the reference level
( 3 )对区域感热通量的计算而言，由于地表温度和整体输送系数产生一个正的次网格通量项，它主要由网格平均粗糙度和参考高度平均风速所决定。 |
| 4. | Draw a conclusion : the social cost of wind power generation is lower ; third , the real cost of wind power generation are studied by model of wind distribution and generation amount and calculating the cost of wind power generation ; the factors affecting wind power generation cost are studied by sensitivities with a real example and draw a conclusion : average wind rate is most influence to wind power generation cost and the ways of reducing wind power generation cost are discussed . fourth , the trend of wind power generation cost is analysised and draw a conclusion : wind power generation cost is dropping ; this paper uses many qualitative and quantitative methods and uses a real example to study wind power generation cost and advanced some ways solving high wind power generation cost
得出；平均风速的变动，对风电成本影响最大；同时分析了减低风电成本的途径； 4本文从三个方面对我国风电成本的走势进行了分析，得出风电成本在未来的发展趋势是逐渐下降的；本文运用了定性、定量方法，以实例为原则，首次比较全面地从社会总成本角度对风电成本进行研究，同时对影响风力发电的因素进行了比较深入的研究，提出了解决风力发电发展中存在问题的方法。 |
| 5. | The static and dynamical parameterized finite element model of the whole frame of the pipe belt conveyor and the fluid dynamic parameterized finite element model of the structural section are established by the software ansys of the finite element analysis . and then the static wind load of the whole frame of the pipe belt conveyor is calculated through the average wind pressure theory and computer simulation technology
利用有限元分析软件ansys建立圆管带式输送机整体机架结构的静、动力参数化有限元模型及结构断面的流体动力学参数化有限元模型,并通过平均风压理论及计算机模拟技术计算出作用于机架结构的静风荷载。 |
| 6. | Zhoushan has a northern subtropical monsoon marine climate with clear four seasons ; leading wind directions are southeast wind in summer , northwest wind in winter . with an annual average wind speed of 3 . 3m s ; and an average temperature of 15 . 6 - 16 . 6 , and the frost free period reaches 251 - 303 days perannum , annual average sunshine time 1941 - 2257 hours , and the annual preeipitation is 927 - 1620 mm
舟山属北亚热带南缘季风海洋型气候，四季分明主导风向，夏季为东南风，冬季为西北风，年平均风速3 . 3米秒年平均气温15 . 6 . - 16 . 6 ，冬季最低温为- 1 ，夏季最高温度为37无霜期251 - 303天，年日照时数1941 - 2257小时年降雨 |
| 7. | Aero - elastic model tests have a long test period and cost much , high frequency force balance technique can only consider the foundational vibration type of the structure and it must be assumed as linear . because this technique can not get the average wind loads on each floor of the building , it can not give the equivalent design loads of structures
在现行的风洞试验技术中，气动弹性模型试验模型制作复杂、试验周期长、费用高，而高频底座天平试验则只能考虑结构的基阶振型并假定其为线性，且由于只能测得基底倾覆弯矩，无法测量各层的平均风荷载，故而无法确定结构各层的等效设计荷载。 |
| 8. | The average wind pressure and the pulsation wind pressure are given systematicly . results are gained which can be used for design . the safety and the stability of the building can be protected . the main research has been done as follow : in chapter 1 , the results of previous studies about wind ad dynamic responses for high - rise building are reviewed and discussed
本文的主要工作如下:第一章综述和讨论了前人在风荷载和动态响应方面的研究结果。第二章主要讨论了高层建筑风致响应的三种研究方法(包括力学模型、解析方法以及两种实验技术) 。 |
| 9. | The main results are as follows : ( 1 ) in the most of places of naqu , the annual sunshine duration are more than 2550 hours and average wind velocity are higher than 4m ? s ^ ( - 1 ) . ( 2 ) the sunshine duration in spring , summer , autumn , winter , growing season ( from may to september ) and a year all decreased in recent 40 years . ( 3 ) the wind velocity in winter decreased and the wind velocity in other 5 periods all increased . ( 4 ) the sunshine duration and wind velocity in 1990 ' s were smaller than that in 1980 ' s for all 6 periods . ( 5 ) the sunshine duration and wind velocity from 2000 to 2005 could continue to decrease
主要结果是：那曲大部分地区，年总日照时数大于2550小时，年平均风速大于4m ? s ^ ( - 1 ) ；近40年那曲地区春季、夏季、秋季、冬季、生长季（ 5 - 9月）和年6个时段的日照时数均呈减少趋势；风速冬季呈减少趋势，其它时段呈增加趋势； 6个时段的90年代日照和风速都小于80年代； 2000 - 2005年日照时数和风速继续减小的可能性比较大。 |
