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Search Results: 1 - 10 of 256042 matches for " 李思李 "
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畜产品价格波动对城乡经济关系的影响—基于价格影响局部闭模型
The Impacts of Animal Products Prices Fluctuations on the Economic Relations of Urban and Rural Areas—Based on the Partially Closed Price Model of Input-Output Method
 [PDF]


Statistics and Applications (SA) , 2014, DOI: 10.12677/SA.2014.32013
Abstract:
本文基于投入产出价格影响局部闭模型,利用2007年73部门城乡投入产出表,测算比较了各畜产品价格波动对国民经济、相关部门产品价格以及城乡居民生活消费的影响。结果显示:(1) 2007~2013年间,由畜产品价格上涨引起的CPI年均涨幅为0.54%,占其年均实际涨幅的19.34%,如果出现通货膨胀,则畜产品价格上涨是一个潜在的原因。同时由此引起的GDP涨幅是其七年实际涨幅的4.18%,畜产品价格上涨通过成本驱动效应能在一定程度上影响我国国民生产总值;(2) 单个部门来说,除去自身价格波动对自身的影响,畜产品价格波动对种植业部门产品价格的影响最大;(3) 随畜产品价格上涨,城乡居民消费和劳动者报酬同时增加,但是消费支出的增加高于劳动者报酬的增加,城乡居民净收益均趋于减少,城镇居民净收益减少幅度比农村居民净收益减少幅度大1.22%。
Based on the partially closed price Model, we used the urban and rural input-output table with 73 departments of 2007 to quantify the impact of animal products price fluctuations on national economy, the relevant departments’ product price fluctuation and urban-rural residents’ consumption. The main results are as follows: (1) From 2007 to 2013, the annual average of CPI caused by animal products price fluctuations was 0.54%, which accounted for 19.34% of the real annual average of CPI. Animal products price fluctuations are potential reasons for inflation. At the same time, the increase of GDP caused by the fluctuations accounted for 4.18% of the real increase of GDP, animal products prices through cost-driven effect to affect GDP; (2) To remove the impact of its price fluctuations on itself, the planting industry was affected mostly in various industries; (3) With the rising of animal products prices, the consumption and remuneration for workers of urban and rural residents increased at the same time. But the increase of the consumer spending was higher than the increase of the remuneration for workers; both urban and rural residents’ net incomes have the trend of decrease. The decrease of urban residents’ net income was 1.22% more than the decrease of rural residents’ net income.
田径运动与教学艺术

天津体育学院学报 , 1995,
Abstract:
船行波和舰船浪花生成技术研究与实现
Research and Implementation of Generating Technology of Ship Wakes
 [PDF]

李芳芳, , 王文珂
Software Engineering and Applications (SEA) , 2014, DOI: 10.12677/SEA.2014.35015
Abstract:
舰船海面行驶时产生的船行波和浪花是一种复杂的水动力现象。近年来随着虚拟仿真技术的不断发展,舰船航迹的模拟仿真在许多领域有着越来越广泛的应用,但是如何逼真的模拟船行波以及舰船浪花仍是困扰我们的关键问题之一。本文提出一种基于开尔文波的三维船行波模拟方法,该方法依据舰船的航行速度和时间,以及船行波轨迹上的位置点与舰船的距离计算船行波轨迹点的高度值以及轨迹点运动;根据舰船模型的长度、宽度以及舰船的吃水长度比,建立粒子发射器模型,模拟船只运行中的头浪、艉浪。基于OsgOcean海浪模拟平台,设计实现了三维船行波的模拟和舰船浪花特效生成算法,取得了较好的仿真模拟效果,满足了应用需求。
The ship wakes, which are caused by the sailing ship, are a complex hydrodynamic phenomenon. In recent years, as the development of virtual simulation technology, the simulation of ship wakes is used widely for many fields, however the fidelity of the simulation of ship waves is still a key question. Based on the Kelven wave, this paper puts forward a method for 3D ship waves simulating, which mainly computes the height and the ship wakes points movement according to the ship velocity, sailing time, as well as the distance between ship wakes point and the ship position. The particle emitter model is made according to the length, width and draft length ratio of the warship model, which is used for simulating the ship wakes. Then simulation of the 3D ship waves and ship waves effects generation algorithm are designed and implemented based on OsgOcean platform. The application results reveal that the method has better 3D emulating effects to meet the re-quirements of applications.
含煤盆地层序地层分析的几个基本问题
,
煤田地质与勘探 , 1993,
Abstract:
尼罗罗非鱼与萨罗罗非鱼回交子代遗传变异的微卫星分析
腾云??
上海海洋大学学报 , 2008,
Abstract: 用6对微卫星引物对尼罗罗非鱼、萨罗罗非鱼及其正反杂交鱼的正反回交子代共6种遗传型(genotype)罗非鱼进行了遗传变异分析,探讨回交的遗传效应.结果表明:(1)6对引物均有较好的多态性,可用于这6种罗非鱼的遗传变异分析;(2)6个微卫星位点在6种鱼中的平均杂合度为0.562~0.731,其中正回交鱼萨尼×尼罗最高(0.731),原始亲本尼罗最低(0.562);多态信息含量为0.510~0.685,也是萨尼×尼罗最高(0.685),尼罗(0.510)最低;有效等位基因范围是2.71~3.85,也是萨尼×尼罗(3.85)最高,原始亲本尼罗最低(2.71).(3)两种反回交子代的nei's遗传距离都与亲本尼罗接近,采用upgma和nj法构建的聚类图表明,回交种与原始母本尼罗罗非鱼为一组,原始父本萨罗罗非鱼为另一组.萨尼×尼罗群体内遗传变异水平最高,是最有育种潜力的回交种;母本尼罗对回交子代的遗传影响大于父本萨罗,回交子代表现了一定的母本效应.
信息系统快速响应变化的能力——敏捷性研究
艳红,
计算机应用 , 2005,
Abstract: ?界定了信息系统的敏捷性的概念,并把它细化拓展为处理敏捷、沟通敏捷、重构敏捷和决策敏捷四个方面,探讨了研究信息系统敏捷性的意义,分析了支持信息系统敏捷性实现的关键技术和相应系统开发方法。
南海红娘鱼属二新种

动物学研究 , 1981,
Abstract: 笔者在《南海鱼类志》(1962)中曾记述红娘鱼属鱼类四种,将翼红娘鱼、斑鳍红娘鱼及日本红娘鱼的喉胸部腹侧无鳞,印为“胸部腹侧有鳞”,而当时认为喉胸部有鳞的鳞胸红娘鱼却被印为“胸部腹侧无鳞”且印为“裸胸红娘鱼”(Lepidotrigla kanagashira)。现知模式产地为日本三重县的L.kanagashira,确系喉胸部腹侧无鳞。经研究,得知1962年所依喉胸部腹侧有鳞的标本实为二新种,现予描述。模式标本均存中国科学院动物研究所。
Design and development of a mooring system for the absorption and transmission of wave energy
有效吸收和传递波浪能的锚泊系统的设计制作

陈永华,
海洋科学 , 2012,
Abstract: On the basis of traditional buoy, the new mooring system for the absorption and transmission of wave energy can be obtained. On the top of the system is the surface float which is connected by tether line. At the lower part of the system are pendulum, chain and anchor, which are connected end to end to the other side of the tether line. The surface float drifts well with the wave and the tether line is vertical between the surface float and the pendulum. The surface float falls with the passage of a wave trough and rises with the passage of a wave crest, which makes the mooring line heave together. Thus the surface float absorbs the wave energy and the mooring line tranfer the energy down. The 20 meters long chain makes sure that the system can work effectively even at high and low tides. An anchor with proper weight fastens the whole system to seabed. In the end, the author gives an example of wave energy application. The desighed mooring system can absorb and transfer the wave energy providing a useful way to make use of the wave energy.
河北省渤海沿岸的魚類採集工作

科学通报 , 1951,
Abstract: 河北省水產局,為了扶助及檢查河北省沿海漁民的生產,並向他們慰勞與宣傳抗美援朝等工作,於今年5月,會邀请中央人民政府農業部第二電影隊,中國科學院動物標本工作委員會及天津水產專科學校诸同志,共赴沿海工作。計自5月15日由北京起程,經天津、黄驊、漢沽、灤南、豐南、樂
上海交通大学工程力学系简介

力学与实践 , 1983,
Abstract: 1959年上海交通大学与上海力学所按系所结合的形式,共同创办上海交通大学工程力学系。当时根据国家建设的需要,设立了固体力学、流体力学及宇航方面的专业。有理论力学、材料力学、固体力学和飞行力学等教研室。教师队伍由三部分人组成:各工程专业调集的一批骨干、原三个基础力学教研室的成员和由清华力学研究班学成归来的教师和毕业生,约120
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