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Search Results: 1 - 10 of 90242 matches for " 朱鹏 "
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基于多目标规划的城市垃圾运输车辆调度问题研究
Study of City Garbage Transportation Vehicle Scheduling Problem Based on Multiple Objective Programming
 [PDF]

郭禹,
Management Science and Engineering (MSE) , 2014, DOI: 10.12677/MSE.2014.33009
Abstract:
随着城市化的发展,城市垃圾问题已成为危害城市环境、制约城市发展的顽疾,如何及时高效的转运城市垃圾是目前各大城市面临的严峻挑战。本文针对该问题,运用运筹学的原理建立了垃圾转运车辆调度方案(包括调度路线、调度时间及工作方式)的多目标规划模型,并运用实例分析的形式验证了该模型在减少垃圾车辆运营成本、提高运营效率方面的有效性。
With the development of urbanization, municipal waste has become a serious issue that hazards the municipal environment and constrains the urban development. How to transport the municipal waste in a timely and efficient way is currently a major challenge faced by big cities. Aiming at this issue, this thesis uses the principle of operations research to establish the multi-objective programming model of the vehicle scheduling program for waste transport (including scheduling routes, scheduling time and work mode) and uses the case analysis to verify the effectiveness of this model in reducing operating costs of waste transporting vehicles and improving the operational efficiency.
晚清教育宗旨奏折试析?

清史研究 , 1996,
Abstract: ?
位于郑州市金水河畔的黄委信息中心办公大楼

人民黄河 , 2002,
Abstract:
基于“物料流-价值流”企业循环经济效率评价研究
Research on Circular Economy Efficiency Evaluation of Cement Enterprises Based on “Material Flow and Value Flow”


- , 2016,
Abstract: 基于“物料流-价值流”分析范式,采用主成分与DEA方法测度水泥企业循环经济效率。结果表明水泥企业废弃物排放主要集中在熟料煅烧中心,中心的内部损失成本和外部损害费用最高,改善空间最大,效果最为明显。通过采用纯低温余热发电、工业废渣替代、高效低阻粉尘回收及生活垃圾协同处置等技术,企业经济效益和环境效益获得显著提升。
Based on the "material flow and value flow" analysis paradigm, this paper uses the principal component analysis and the DEA method to build a cement enterprise circular economy efficiency evaluation model, and chooses the material flow indicators as input variables, and the value stream index as output variables of cement enterprises. Analysis of the data from four companies shows that waste mostly occurs and discharges from the center of clinker calcination, which causes the greatest loss and has much room for improvement. With the use of waste heat power generation, industrial waste utilization, high efficiency low resistance dust collection technology, and co-disposal of household garbage, a cement enterprise can significantly improve its economic benefits and environmental benefits.
全球陆表湿地潜在分布区制图及遥感验证
,
中国科学 地球科学 中国科学 地球科学 , 2014,
Abstract: ?由于城市化和农业垦殖等人类活动不断增强,很多湿地生态系统受到侵占或干扰.保护湿地资源需要准确的湿地分布.然而由于湿地类型复杂多样,地面调查困难,大范围湿地分布制图很难完成.目前还没有专门用于湿地保护和规划且有较高分辨率的全球湿地分布数据.采用水文、气候数据结合1km分辨率的混合地形指数(CTI)数据,利用陆表湿地和地下水位的关系,模拟出不考虑人类活动影响状况下30s分辨率的全球陆表湿地潜在分布区.这是最高分辨率的全球陆表湿地的潜在分布数据.模拟结果显示全球陆表湿地潜在分布区面积达到3.316×107km2.用遥感获得的实际湿地数据对陆表湿地模拟结果进行精度验证,总体精度达到83.7%.本次模拟结果可以作为构建全球湿地实际分布数据库的基础.由于模拟过程未考虑农业灌溉、建坝等人类活动对湿地的干扰破坏,因此本文对陆表湿地潜在分布区的模拟结果大于当前几种全球土地覆盖制图产品中湿地的面积.本文采用方法所需数据相对较少,精度高于其他产品.
基于结构方程模型的敦煌居民对旅游开发态度分析
The Analysis of Dunhuang Residents’ Attitudes towards Tourism Development on the Basis of Structural Equation Modeling
 [PDF]

, 谢小平, 刘文杰
Geographical Science Research (GSER) , 2012, DOI: 10.12677/GSER.2012.12003
Abstract: 随着旅游产业的发展,旅游开发给当地居民带来的经济、环境和社会文化等方面的影响越来越大。本文是在实地调研的基础上,基于结构方程模型分析影响旅游地居民态度的因素,运用SPSS和AMOS软件对模型检验分析。研究结果表明,影响当地居民对旅游开发态度最大的是经济感知因素,最小的是环境感知因素;经济与社会文化因素相互影响,并呈正相关。
With the rapid development of tourism industry, residents of tourism areas have been increasingly affected by tourism development in the field of economy, environment, culture and society. In this thesis, the authors, based on their fieldwork and questionnaire research, analyzed the factors to impact residents’ atti-tudes of the tourism areas on the basis of structural equation modeling, check and study the modeling with the softwares SPSS and AMOS. The results of studies shows that the most important factors influencing local residents’ attitudes towards tourism development lies in economy, the minimum factor is environment, and the economic, social as well as cultural factors interact with each other, and interrelated.
单景扫描点云数据网模型的构建方法研究
Research on Mesh Model Reconstruction for One Station Terrestrial Laser Scanning Point Cloud
 [PDF]

高珊, , 张正
Computer Science and Application (CSA) , 2011, DOI: 10.12677/csa.2011.13030
Abstract: 本文主要对点云数据网模型的构建方法进行研究,探讨点云数据构网的方法——基于球面投影构网算法以及基于空间三角的构网算法。本文首先分析了激光扫描数据的采集原理和数据基本特点,通过研究以上两种构网方法的优势与不足,考虑到单站地面激光扫描点云数据的特点,具体给出了空间三角网生长算法的模型并应用于实践。该算法首先利用中心投影的方式将单站激光扫描点云数据投影到一个球面上,在球面上进行构网,这样保证了点之间的正确邻接关系;然后根据空间Delaunay构网条件,制定了四个限制条件来进行选点构网;最后在AUTOCAD平台下结合VBA语言,以具体雕像为例,实现了空间三角网模型建立。
This paper focuses on the method of constructing model with point clouds. It introduces the me- thod of the based on the spherical projection algorithm and the based on spatial triangle algorithm. Firstly analyzed laser scanning data collection principle and basic characteristics of data. By exploring the merit and demerit of above two kinds of methods, and considering the features of the single stand ground laser scanning point cloud, specifically introduce the spatial triangle mesh growth model. Firstly this algorithm makes the point cloud data onto a sphere with central projection, making the mesh on the sphere to ensure the correct adjacency relations between the points; then according to the space Delaunay analyzed, making four limiting conditions to choose point and constitute mesh. Finally, using the VBA development to realize the establish- ment.
基于因子分析的敦煌莫高窟游客满意度研究
The Study of Dunhuang Mogao Caves Tourist Degree of Satisfaction Based on the Factor Analysis
 [PDF]

刘文杰, 谢小平,
Geographical Science Research (GSER) , 2012, DOI: 10.12677/GSER.2012.13007
Abstract:
敦煌莫高窟是世界著名的文化遗产,每年来参观的国内外专家、学者和游人络绎不绝,游客的满意程度对敦煌旅游的进一步发展影响深远。本文基于对敦煌莫高窟游客的现场调查和填写问卷对游客的满意度进行研究,利用SPSS19.0对影响游客满意度的诸多因素进行因子分析,并据此建立回归模型。研究结果显示对游客满意度的影响最为明显的是敦煌莫高窟景区的物价水平,其次是景区形象,第三是景区服务。本研究对如何提升敦煌莫高窟游客的满意度具有重要指导意义。
Dunhuang Mogao Caves are very famous cultural heritage in the world. Numerous domestic and abroad specialists, scholars and tourists come here to visit the caves, annually. With the rapid development of tourism industry, tourists’ degree of satisfaction will influence the further tourism development of Dunhuang City. The paper is based on the field investigation of tourists’ degree of satisfaction in Dunhuang Mogao Caves, and we analyzed the factors which impact tourist degree of satisfaction based on factor analysis and regression model through SPSS19. The results show that the tourist satisfaction affected mostly by the price level in the scenic area, then the visualization of scenic area, the third is service to tourist from the scenic area. The results will be helpful to improve the tourists’ degree of satisfaction in Dunhuang Mogao Caves.
多维项目反应理论的计量模型、参数估计及应用
Multidimensional Item Response Theory: Psychometric Models, Parameter Estimation and Application
 [PDF]

, 新立, 王芳
Advances in Psychology (AP) , 2015, DOI: 10.12677/AP.2015.56048
Abstract: 多维项目反应理论是现代心理测量理论的新发展,文章对多维项目反应理论的计量模型、参数估计及应用进行了综述,认为多维项目反应理论模型开发应与认知结构相结合,马尔科夫链蒙特卡洛方法能较好地实现多维项目反应理论的参数估计,应加强多种题型、多种多维项目反应模型结合的参数估计研究,建议使用基于最大信息量法的多维项目反应理论模型计算测验的总分。
Multidimensional Item Response Theory (MIRT) is the new development of modern psychometric theories. The psychometric models, parameter estimation and application of MIRT are overviewed in this paper. It is concluded that the development of MIRT models should be combined with cognitive construct, the method of MCMC should be used to enhance the parameter estimation of MIRT, the research of the mixed MIRT should be strengthened, and the method of maximum information should be used to get the total score of a test.
经济增长的根源:投资推动抑或消费拉动——一个思想史的梳理和辨析
富强,
- , 2016, DOI: 10.16538/j.cnki.jfe.2016.02.005
Abstract: 现代主流经济学不区分投资支出和消费支出,更不区分消费的不同类型,而是将所有支出都视为经济发展的动力,甚至将消费乃至奢侈性消费当作拉动经济增长的主要动力。与此不同,古典经济学将投资支出视为经济发展的根本,从而对奢侈性消费持强烈的批判态度。究其原因,古典经济学的研究对象是国家组织,核心议题是国民财富的增长,而组织运行的有效性和劳动生产率的提高都取决于社会分工水平和生产迂回程度,都以不断积累和投入的资本为基础。而现代主流经济学仅仅关注当下的个人福利或效用,仅仅关注已经存在的有效需求不足问题,从而看不到奢侈性消费和破坏性支出在本质上的浪费性和损坏性。同时,不同于凯恩斯主义经济学,古典经济学的投资支出依赖于没有消费掉的剩余产品及其在生产中的投入,而不是从民众中转移而来的税收或从未来转移而来的国债。因此,古典经济学的"投资推动增长论"有助于我们认识现代主流经济学无法解释的一系列社会经济现象,也能为"供给侧改革"提供理论基础。
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