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Search Results: 1 - 10 of 283162 matches for " 刘晓 "
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基于点对点辅助的室内定位方法研究与实现
Research and Implementation of Indoor Localization Method Based on Peer-to-Peer Auxiliary
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Computer Science and Application (CSA) , 2014, DOI: 10.12677/CSA.2014.41001
Abstract:
随着移动终端和移动互联网的发展,人们对于基于位置信息的服务的需求日益增大。相比室外环境可以采用GPS定位方法,在室内环境下,精确定位比较困难。本文描述了一种基于点对点辅助室内定位方法。该方法利用室外移动智能终端的GPS获得精准基准点并通过RSSI协助室内移动智能终端实现定位该文详细地分析了该室内定位方法的工作原理,并给出了详细的设计方案。实验结果表明,该方法具有较高的可行性。
With the rapid development of mobile smart device and mobile Internet, people’s demand for location-based services is increasing. Compared to the outdoor environment using GPS, precise positioning is more difficult in indoor environment. This paper describes the indoor localization method based on peer-to-peer auxiliary. The method utilizes GPS of outdoor smart devices to get accurate datum point, and implements localization by RSSI assisting the indoor smart devices. This paper analyzes the principle of the indoor localization method, and gives a detailed solution. Experimental results show that the method is of high feasibility.
再制造绿色供应链中政府关于补贴与费用的策略分析
Determining Recycling Fees and Subsidies in Remanufacturing Green Supply Chains
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Service Science and Management (SSEM) , 2015, DOI: 10.12677/SSEM.2015.44B002
Abstract:

由于环境保护问题越来越受到世界各国和地区的高度重视,我国出台了一系列相关法规条例,以规范回收市场。同时,通过对生产商征收环保回收税费并对回收进行补贴的策略,在控制回收数量和生产数量的过程中起到了越来越重要的作用。本文为探究政府为实现社会福利最大化而实施的不同激励策略的效果,以及企业相应进行的不同决策,建立了绿色供应链博弈模型,分析了该模型在多种情况下的最优均衡结果。对比了政府基于回收率补贴与回收量补贴这两种激励策略的有效性。研究结果表明:政府采用任一种激励策略均能提高产品回收率;若政府若采用基于回收率补贴激励策略将更有效提高回收效率,实现社会的最大福利。
Primarily due to environmental concerns and legislative mandates, the disposition of end-of-life electronics products has attracted much attention. Recycling fees and government subsidies played important roles in encouraging or curtailing the recycled flows. Due to the environmental protection problem attracting great importance by more and more countries and regions around world, our country launched a series of regulations and laws to standardize the recycling market. At the same time, though taxing recycling fees on manufacturers and giving the recycling subsidy to the recyclers, the government can control the recycling quantity and production quantity. This paper establishes the green supply chain game model to explore the government implementations for the realization of social welfare maximization, and the different incentive strategy of enterprises corresponding to different implementations. Then, we analyzes the optimal equilibrium decision results of the game model in a variety of circumstances, and compares effectiveness of the government subsidies strategies based on the recovery percent or recovery quantity. The results show that the government using any kind of incentive strategy can improve the product recovery; and the government’s subsidy incentive strategy that is based on the recovery percent could improve the recovery efficiency more effectively, realizing the maximum social welfare.

金融发展对居民收入不平等影响的实证分析—来自云南16个地州市的经验证据
The Effect of Financial Development on the Residents’ Income Inequality—An Empirical Analysis from 16 Cites in Yunnan Province
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Finance (FIN) , 2015, DOI: 10.12677/FIN.2015.54011
Abstract:
云南省金融发展对居民收入不平等的改善具有一定的作用。论文采用2008~2012年云南省16个地州市的面板数据进行实证分析,结果发现:云南省金融发展与收入不平等是非线性关系,二者呈“倒U型”。因此,缩减云南省居民间的收入不平等必须注重金融发展的规模与效率、深化金融发展的同时需考量区域间金融发展和收入不平等存有的异质性,才能制定良好的经济金融政策,以缩减居民收入不平等程度。
Financial development has a certainly effect on the reduction of income inequality. Using the panel data of 16 cities from 2008 to 2012 in Yunnan Province, this paper examines the relationship between financial development and residents’ income inequality by empirical analysis in Yunnan Province. The results of regression suggest that there is a nonlinear relationship of “inverted U shape” between financial development and income inequality. Therefore, reducing the income inequality needs to pay attention to the scale and efficiency of financial development, deepen financial development, and consider the entities of heterogeneity in regional financial development and income inequality for making perfectly economic and finance policies to reduce the income inequality of residents in Yunnan.
关于提高国民经济系统宏观经济效益途径的探讨

系统工程理论与实践 , 1984,
Abstract: 国民经济系统的产出效率和经济效益如何,是关系到我国能否加速实现四个现代化的关键问题。要提高国民经济系统的效率和总的经济效益,需要弄清国民经济系统各种投入与产出之间的复杂机制,不仅要从性质上进行分析,同时还要从数量上进行研究,只有尽可能地把反映事物性质的种种因素之间隐含的数量关系搞清楚,并加以综合分析研究,制定出正确的决策以指导国民经济的实践活动,才能得到满意的结果。 本文试图通过对国民经济系统宏观经济效益及其制约因素的数量分析,探讨提高国民经济系统宏观经济效益的途径。
井下钻孔重复水力压裂技术应用研究

煤炭工程 , 2013,
Abstract: 我国煤矿煤层透气性系数低、抽采难度大,严重制约着矿井的安全高效生产。水力压裂因其增透效果显著,被广泛使用,但井下钻孔水力压裂存在压裂裂缝类型单一、压裂钻孔抽采寿命短、不均衡,易垮塌、堵塞,后期裂缝导流能力不足等问题;为改进完善已有井下水力压裂技术,本文结合煤矿实际情况,引入石油开采领域的重复压裂技术,尝试探讨了井下钻孔重复压裂的原理、类型及裂隙体系的形成,并通过现场应用取得了较好的效果。
科学的传统与创新——何泽慧先生百年诞辰纪念

物理 , 2014,
Abstract: ?本文从几个不同方面回顾了何泽慧先生的学术成长经历。她继承了蔡元培等老一辈学者科学救国的理念,接受了前沿的科学教育和训练,在国际交流与合作中做出创新工作,并参与创建我国核科学事业,汇聚和培养了大批人才。科学的创新离不开优良的传统,我们纪念何泽慧先生百年诞辰,既缅怀她的创新成就和对科学事业的贡献,也要发扬她的科学精神和传统。
不同壳色皱纹盘鲍杂交家系j1rhf1全长cdna文库的构建

水产学报 , 2004,
Abstract: 采用日本岩手县的野生皱纹盘鲍(j1,♀)和中国的人工选育红壳色皱纹盘鲍突变体(rh,♂)的配子,经人工授精建立了皱纹盘鲍杂交家系(j1rh).取j1rh家系6月龄f1个体的软体部组织为材料,以smart技术构建了全长cdna文库,命名为hd-j1rh文库.hd-j1rh未扩增文库的滴度为6.4?105pfu?ml-1、重组率为93.75%,插入片段均大于400bp,81.25%克隆的插入片段分布在1000~1500bp之间;扩增后的文库滴度为3.07?109pfu?ml-1.表明hd-j1rh文库是一个高质量的cdna文库,可满足进行大规模est序列分析和特定发育阶段相关基因的筛选等研究的需求.
^60co-γ射线对成体长牡蛎生长的影响及致死效应

水产学报 , 2005,
Abstract:
具有PH(n)理赔时间间隔的Sparre-Andersen 模型中的分红问题
Dividend problems in a Sparre-Andersen model with PH(n) interclaim times


- , 2015, DOI: 10.6040/j.issn.1671-9352.0.2014.484
Abstract: 摘要: 假设盈余过程描述为Sparre-Andersen模型, 理赔时间间隔服从PH(n)分布, 分红只在一些随机的观测时间支付, 分红策略为障碍策略,得到了期望折现分红和破产时间Laplace变换所满足的积分-微分方程组,并在n=2和指数理赔的假设下给出了方程组的求解方法。
Abstract: Assuming that the surplus process is described by a Sparre-Andersen model, the interclaim times are PH(n) distributed, dividends can only be paid at some randomized observation times and the dividends are paid according to a barrier strategy, the integro-differential equations for the expected discounted dividends and the Laplace transform of ruin time were derived. The solutions of the equations were given with exponentially distributed claims and n=2
指数施肥对美丽异木棉幼苗生长及光合生理的影响
Effects of Exponential Fertilization on the Seedling Growth and Photosynthetic Physiology of Chorisia speciosa
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德良,,
World Journal of Forestry (WJF) , 2013, DOI: 10.12677/WJF.2013.24008
Abstract:

采用指数施肥法、设置6个不同施肥浓度(0、1000、2000、3000、4000、5000 mg/株)对美丽异木棉的幼苗生长、光合生理特性进行了研究。结果表明:1) 不同处理的苗高、地径生长差异,其中苗高、地径、生物量受N素指数施肥影响的大小顺序为:苗高 > 地径 > 总干重;2) 从苗木根系、叶片生长特征值看,不同浓度指数施肥处理对美丽异木棉叶片、根系生长的效应是不同的,其中,叶片面积以处理VI为最大,处理IV为最小,但不同处理间的差异不显著;而根系总长度、表面积、投影面积、体积4项指标各浓度处理间虽未达显著水平,但均以处理VI为最好;3) 幼苗光合生理指标有显著差异,其中净光合速率呈现先增加后减小的趋势,而随着施肥浓度的增加,气孔导度呈现先减小后增加再逐渐减小的趋势,胞间CO2浓度和蒸腾速率由于受气孔导度的影响,表现出与气孔导度相似的变化变化趋势。

In order to explore the effects of exponential fertilization on the seedling growth and photosynthetic physiology characteristics of Chorisia speciosa, the exponential fertilization method was conducted with 6 nitrogen dose levels (applying a total of 0, 1000, 2000, 3000, 4000, 5000 mg/seedling in this experiment). The results showed that: 1) The height and ground diameter of different treatments had significant differences, of whom the impact ranking of height, ground diameter and biomass was height, ground diameter, gross dry weight; 2) From root and leaf eigenvalue, the growing effect of Chorisia speciosa seedlings was different under different fertilizing methods, and among blade area, treatment VI achieved the maximum and treatment IV achieved the minimum, but the blade area of different treatments had no significant differences; moreover the 4 index of root total length, surface area, projective area and volume in the different concentration treatments had no significant differences but among treatment VI had the best; 3) Photosynthetic physiological characteristics of Chorisia speciosa seedling with different treatments had significant differences, of whom net photosynthetic rate first increased and then decreased, but with the increase in the amount of nitrogen fertilizer, stomatal conductance first decreased and then increased and then decreased again, and the changing trend of the intercellular CO2 concentration and transpiration rate kept consistent with the changing trend of stomatal conductance.

 

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