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Search Results: 1 - 10 of 22115 matches for " 盛佳 "
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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]

, 潘东东
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.
抗阻训练对达州市45~55岁肥胖男性的骨髓脂肪含量的影响
The Effects Form Resistance Training on Bone Marrow Fat Content of Obese Men of 45 to 55 Years Old in Dazhou City
 [PDF]

, 弓腊梅
Advances in Physical Sciences (APS) , 2015, DOI: 10.12677/APS.2015.34013
Abstract:
众多的研究已经表明骨髓脂肪含量与造血增生负相关,且随着年龄的增长骨髓脂肪含量比例逐渐增加,本文主要探讨抗阻训练对中年肥胖男性的骨髓脂肪含量的影响。研究对象:达州市11名45~55岁肥胖男性志愿参加此项研究。测试方法:采用核磁共振成像对受试者的腰椎2-4测试。结果:4周的运动干预,训练前后抗阻训练组的骨髓脂肪含量显著降低,对照组无显著变化。结论:抗阻训练降低了BMI的同时,减少了骨髓脂肪含量,抗阻训练可能是一种可行的、有效的激活造血的训练方式。
Many studies have shown that bone marrow fat content was negatively related to the hyperplasia of blood, and as the growth of the age of the bone marrow fat percentage increases gradually, this paper mainly discusses the effects of resistance training on bone marrow fat content of middle- aged obese men. Studies: 11 obese men of 45 to 55 years old volunteered to participate in the study. Methods: Magnetic resonance imaging was used for testing lumbar vertebrae 2-4. Results: After 4-week exercise intervention, bone marrow fat content of the resistance training group significantly reduced, while the control group had no significant change. Conclusions: The resistance training reduced the BMI as well as the bone marrow fat content; resistance training can be a feasible and effective training way for activating hematopoiesis.
持续发展与地理学之管见

地理科学 , 1995,
Abstract: 影响持续发展的主要问题是人口、资源、环境和发展在分布失衡状态下的不协调关系,解决此问题的关键是加快人类社会的全面发展和人口、能量、物质、信息的合理流动.面对持续发展问题,地理学必须将地域差异规律和分布不平衡规律统一起来,将流、网络、界线构成空间系统,并将流的建设——地理建设作为服务于人类社会持续发展的舞台.
《禹贡》——世界上最早的区域人文地理学著作

地理学报 , 1990, DOI: 10.11821/xb199004004
Abstract: 《禹贡》是中国最早的地理著作,本文从九州边界的确定、九州的区域研究模式、治山和治水的辩证关系与圈层地带结构模式的朦胧设计四个方面进行分析论述,认为《禹贡》是中国第一个奴隶制国家的国土综合整治开发建设总体规划,内分分区国土整治开发,分系统国土整治开发和国土整治开发战略。战略的最终目标是建立以华夏族为主的多民族统一国家。五服说在理论、内容、方法上,都显示了超前水平,具有一定学术价值和现实意义。本文认为它是世界上最早的区域人文地理学著作。
吴传钧院士的人文地理思想与人地关系地域系统学说

地理科学进展 , 1998, DOI: 10.11820/dlkxjz.1998.01.003
Abstract: 值吴传钧院士八十华诞(1918~1998)之际,本文谨以他的人文地理思想与人地关系系统学说为题来祝贺。他在人文地理学中系统阐发了人地关系、人地关系系统和人地关系地域系统思想,为中国人文地理学复兴确立了理论与实践结合的科学方法论,是我国最杰出的地理学大师之一,也是世界上知名的地理学家。
企业级应用系统综合管理平台的研究与实现
Integrated Management Platform for Enterprise Application System: Design and Implementation
 [PDF]

, 蒋忠新, 董苹苹,
Computer Science and Application (CSA) , 2013, DOI: 10.12677/CSA.2013.35042
Abstract:
随着国内企业网络规模的扩大,越来越多的企业认识到,除了要依靠设备本身和网络架构的可靠性之外,通过对网络中服务器的性能监控来保证整个系统高效、可靠地运行一样重要。本文设计并实现了一种基于CPMM模型的企业级应用系统综合管理平台,平台通过JMX(Java Management Extensions, Java扩展管理)SNMP(Simple Network Management Protocol,简单网络管理协议)WMI(Windows Management InstrumentationWindows管理规范)等技术对监控范围内所有服务器的详细运行情况进行监控,并根据监控信息进行判断,当性能变差或存在其他问题时及时预警,告知可能会发生的故障。它为企业提供了一个综合的解决方案,使管理员不必再为每个IT资源准备不同的监控工具来保证整个系统高效、可靠地运行。
With the expansion of domestic enterprise network, more and more enterprises realize that, in addition to rely on the device itself and the reliability of the network architecture, to ensure the whole system run efficiently and reliably through monitoring the performance of network servers is important equally. In this paper, an enterprise-level application management platform based on the CPMM model was proposed. This platform integrates JMX (Java Management Extensions), SNMP (Simple Network Management Protocol) and WMI (Windows Management Instrumentation) to monitor the running state of all the servers in monitoring range, and judges whether the system has a poor performance or other problems according to the monitoring information and informs the fault to user. The platform provides a com- prehensive solution for enterprise to ensure the whole system run efficiently and reliably, which makes administrators not need to prepare different monitoring tools for different IT resources.
内皮细胞特异性RTK受体与血管生成
,刘旭
第三军医大学学报 , 2005,
Abstract:
财务重述、管理层权力与股价崩盘风险:来自中国证券市场的经验证据
Financial Restatements,Managerial Power and Stock Price Crash Risk:Evidence from Chinese Security Markets

,
- , 2017,
Abstract: 股市震荡引发投资者和监管层对股价崩盘风险的关注。从财务重述背后所反映的财务信息质量低下和公司治理失效出发,探讨其对股价崩盘风险的影响,结合管理层权力这一影响组织行为和产出能力的代理人特征,探讨其对财务重述与股价崩盘风险之间关系的影响。研究结果表明:相比未发生财务重述的公司,发生了财务重述的公司的股价崩盘风险明显更高;进一步纳入代理人特征——管理层权力后,发现代理人的这一特征对上述关系有明显的促进作用。
Stock market volatility led investors and regulators to be concerned about the stock price crash risk. From the view of financial restatements which reflect the low quality of financial information and corporate governance failures, we discuss its impact on the stock price crash risk. Combined with the managerial power which is one of the features of the agent that can affect the organizational behavior and output capacity, we explore its effect on the relationship between financial restatements and stock price crash risk. Our empirical research suggests that, compared to the company which the financial restatement did not occur, the company which restates its financial reports faces a greater risk of the stock price crash; with including the agent feature--managerial power, the results indicate that this feature of the agent plays a significant role in promoting the above-mentioned relationship.
苏里格气田苏48区石盒子组八段沉积特征及演化规律
 [PDF]

孔德博, 冯强汉, 陈龙,, 魏千, 雷迅
Journal of Oil and Gas Technology (JOGT) , 2015,
Abstract:
基于前人对区内沉积环境的认识,结合岩心观察资料,认为苏里格气田苏48区石盒子组八段(Psh8)发育辫状河三角洲沉积环境,进一步可细分为辫状河三角洲平原与前缘2类亚相,分流河道、废弃河道、越岸沉积、水下分流河道、支流间湾、远砂坝及席状砂等7种微相类型。通过电测曲线资料,建立测井相并编制出各小层沉积微相平面展布图,对其演化规律进行深入剖析,综合认为Psh8沉积时期,湖岸线向北推进,湖平面上升,形成砂体退积的沉积样式。
Editors' Choice in Establishing Columns with Special Characteristics
特色栏目创建中的编辑选择

曾凡,
中国科技期刊研究 , 2009,
Abstract: 高校学报特色栏目的创建是改造高校学报的途径.在特色栏目创建中,编辑主体的选择、取舍,受到客观性基础的相对制约,因而面临着一些矛盾:高校学报特色栏目创建与其固有属性之间存在冲突,占有的稿件达不到所设想的特色栏目的要求,创建特色栏目和期刊整体质量之间难以兼顾平衡,编辑素质和特色栏目的高要求有一定的差距.要有效解决创建特色栏目中遇到的矛盾,编辑选择在尊重期刊客观性基础的同时,要发挥主观能动性,要有长远的目的,还要有准确的预见.既要立足本校,又要开门办刊;既要慎重考虑,又要有所作为;既要埋头办栏,又要抬头看路.
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