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Search Results: 1 - 10 of 22509 matches for " 潘东东 "
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基于增强回归树的房价影响因素分析—以波士顿地区为例
Factor Analysis of Housing Price Based on Boosting Regression Tree—Taking Boston as an Example
 [PDF]

盛佳, 东东
Statistics and Applications (SA) , 2016, DOI: 10.12677/SA.2016.53030
Abstract: 房价是反映一个地区经济社会发展水平和状况的重要指标,对其影响因素以及影响的方式和程度进行探究具有理论价值和现实意义。增强回归树是近年来机器学习领域备受关注和推崇的一种非参数建模分析方法,具有建模效率高、模型结果易于解读等优势。本文以美国波士顿地区的历史房价数据为例,采用增强回归树方法来探寻该地区房价的主要影响因素,并比较不同因素在回归树中的相对影响强度。本文得出的结论可为我国某些中心城市的房价调控政策提供参考。
Housing price is a very important index which can reflect the economic and social development level and situation of a certain region or city. It is of great theoretical value and practical meaning to study important factors influencing housing price as well as their influence patterns and magnitude. Boosting regression tree has been recently developed as one of the most prevalent nonparametric modeling methods in the fields of machine learning, which has desirable properties such as high efficiency as well as easy-interpretation. In this paper, we take the housing price data in Boston as an example and try to analyze factors determining housing price based on Boosting Regression Tree method. We identify some relatively significant factors by comparing their relative importance in the model and also investigate their influence patterns. Results in this paper could be reasonably extended to housing price researches of some Chinese first-tire cities.
大学校医院看病花费的因素分析
Factor Analysis on the Cost of University Hospital
 [PDF]

东东, 唐安民, 杨志煌, 李壁涛
Statistics and Applications (SA) , 2013, DOI: 10.12677/SA.2013.24015
Abstract:
高校校医院担负着在校师生的日常医疗保健任务。本文以云南大学校医院为例,主要研究201322851期间该校医院的每天看病人数、看病花费与一周工作日、天气、病人身份等因素之间的关系。研究发现中西药花费及中西药花费差在学生与教职工中均有明显差异,周一和周五看病人数明显多于周二至周四而天气因素对看病人数没有显著的影响。据此我们提出了几点关于高校校医院管理的建议。
University hospital undertakes the daily healthcare duty for facilities and students. In this paper, based on the data from the Hospital of Yunnan University during February 28 to May 1 in2013, we study the relationship between the number of daily medical treatment, the cost per time and the weather, patient ID and medical treatment date etc. We find that the cost of traditional medicine and western medicine is different between students and faculties, and the number of patients in Monday or Friday is larger than that in Tuesday, Wednesday or Thursday; however the weather has no significant influence on the number of patients. Based on these findings, we give some suggestions on improving the management of the university hospital.
全基因组关联研究综述
东东,李正帮,张维,李启寨
应用概率统计 , 2014,
Abstract: 本文是对近十年来科学前沿热点问题之一的全基因组关联研究(genome-wideassociationstudy,GWAS)的一个综述,侧重于介绍其中所用到的统计分析方法,讨论当前GWAS中存在的一些问题及挑战,并就其发展前景作一个展望.
空气中激光触发沿面闪络的蒙特卡罗仿真
如政,王珏,严萍,孙广生,东东,周媛,李敏堂
强激光与粒子束 , 2010,
Abstract: ?搭建了空气中脉冲电压下激光触发沿面闪络试验平台,在试验平台上进行了尼龙介质的激光触发沿面闪络特性试验,应用蒙特卡罗方法对尼龙在空气中激光触发沿面闪络过程进行仿真。建立了激光触发沿面闪络的蒙特卡罗仿真模型,对蒙特卡罗算法的实现过程进行了描述,得出激光能量密度不同时的闪络时延。仿真结果显示,随着激光能量密度的上升,激光触发沿面闪络时延下降,这表示激光能量密度增加,在介质表面上产生的电子数增多,使沿面闪络的时延减小,仿真结果与试验结果趋势一致,初步验证了空气中脉冲电压下激光触发沿面闪络机理。
基于μC/OS-II的无线传感器网络网关的设计与实现
The Design and Implementation of the WSN Gateway Based on μC/OS-II
 [PDF]

刘雪梅,东东
Journal of Sensor Technology and Application (JSTA) , 2016, DOI: 10.12677/JSTA.2016.42009
Abstract: 随着无线传感器网络的大规模应用,应用系统对传感网络传输实时性的提升,汇聚节点感知数据的远程实时传输显得尤为重要。本文将基于ZigBee协议的无线传感器网络与基于TCP/IP协议的Internet相连接,并引入μC/OS-II嵌入式实时操作系统,对系统资源进行管理和调度。实验结果表明,所设计的网关能够有效解决数据远程传输的问题,同时能够满足应用监控的实时性要求。
With the large-scale application of wireless sensor network (WSN), in this application system, it is particularly important to promote the transmission real-time and achieve the remote real-time transmission of the data that the sink nodes sensor gets. This paper uses the way of the connection of the WSN based on Zigbee protocol and the Internet based on TCP/IP protocol, meanwhile in-troduces μC/OS-II embedded real-time operating system to manage and schedule the system re-source. The experiment result shows that the design of this gateway can effectively solve the problem of data remote transmission, and also can meet the real-time requirement of the applica-tion monitoring.
关于精神病人和醉酒人刑事责任能力的法律适用与完善
东东
中外法学 , 1990,
Abstract:
市场经济体制下高等法学本科教育课程结构之我见
东东
中外法学 , 1995,
Abstract:
论司法精神医学鉴定的无病推定原则
东东
中外法学 , 1997,
Abstract:
schb对uva损伤hacat保护作用的研究
东东
天津医药 , 2014,
Abstract: ?目的探讨五味子乙素(schb)对长波紫外线(uva)诱导永生化人角质形成细胞(hacat细胞)损伤后的保护作用及其可能的作用机制。方法用5j/cm2的uva照射hacat细胞,给予不同浓度的schb(0.1、0.01、0.001、0.0001μmol/l)处理uva损伤后的hacat细胞,检测细胞超氧化物歧化酶(sod)及谷胱甘肽过氧化物酶(gsh-px)的活性,乳酸脱氢酶(ldh)及no含量。结果uva照射hacat细胞后,sod、gsh-px活性降低,ldh及no含量升高,给予不同浓度的schb均能显著提高sod、gsh-px活性,降低ldh及no含量,提高hacat细胞的存活率,尤其以0.001μmol/lschb的保护作用最强。结论0.001μmol/lschb减轻uva对hacat细胞损伤的效果最佳。
边坡大变形损伤破坏的高效无网格模拟
东东
岩土力学 , 2007,
Abstract: 首先讨论了lagrangian和eulerian无网格近似的联系和区别,然后基于稳定节点积分和增量本构理论,建立了分析边坡静动力破坏的高效大变形无网格法,并给出了详细的计算流程。该方法采用弹塑性损伤耦合本构关系来模拟岩土类材料的破坏演化过程,其中屈服函数采用drucker-prager准则,损伤准则为基于应变的各项同性损伤函数。由于无网格近似和稳定节点积分具有非局部近似的特性,在保证空间离散稳定性和提高计算效率的同时,也可准确有效地模拟应变集中所形成的剪切带的发生与扩展,通过数值算例验证了方法的有效性。
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