渔民参加渔业非正式组织意愿的实证分析——以上海市崇明县为例

论文通过对渔业非正式组织形成的内在必然性进行阐述以及对渔民参加渔业非正式组织意愿及影响因素进行回归分析,来探究我国渔民参加渔业非正式组织真实现状,指出了推进渔业非正式组织成立和发展的必要性。实证结果表明,渔民学历越高越愿意参加渔业非正式组织;越倾向于大额高端销售渠道的渔民越愿意参加渔业非正式组织;机械化程度越高渔民越愿意参加渔业非正式组织。由此,论文建议:渔业非正式组织所提供的服务需要进一步完善,在渔民中需要更多普及;渔业非正式组织要不断强化拓宽销售渠道的作用;渔业非正式组织要积极为渔民寻求外部资金支持。     

化工装置操作规程的在线应用

以丁二烯装置的操作规程电子平台的实施为案例,详细介绍了操作规程的在线应用、装置在线运行维护以及在线培训等内容。通过结合工厂实际进行的模块设计、开发与组态操作规程电子平台,实现了实时数据库、操作规程数据库与操作监控数据库的集成,提高了丁二烯装置生产操作中的信息化水平。     

浅议楼梯施工缝位置

本文由楼梯施工缝的施工规范以及楼梯施工缝上返"三步"的讨论,引出楼梯施工缝施工中存在问题,继而提出正确的处理方法,以规范楼梯施工缝施工措施,提高施工质量。     

产品品种规格类标准的研制方法

本文分析了品种规格标准的属性、地位、建立、作用等特点,论述了品种规格标准的内容结构及其要素,划分了五种品种规格类标准的类型,分别阐述了每种标准的主要内容、表述方式和作用等,研究了品种规格的分类和命名关系,讨论了标准中优选原则的建立,论述了品种规格优选的方法,提供了标准中管理的典型内容,给出了标准应用指导的设计方法。     

Identification of Factor Models for Forecasting Returns

A data-driven approach for forecasting returns of asset pricesis introduced. Special emphasis is given to data-driven specificationand to dimension reduction. Specification is performed by amodified AIC, BIC-based An-algorithm. Quasi-static principalcomponent analysis, quasi-static factor models with idiosyncraticerrors and reduced rank regression are considered. The forecastingresults obtained are compared.     

Dynamic Macroeconomics

David Romer, Advanced Macroeconomics. Stephen J. Turnovsky, Methods of Macroeconomic Dynamics.      

Control Charts for One-sided Capability Indices

There are many industrial product characteristics are desired to be the bigger the best and the smaller the best. The two well-know processes capability indices C _pl and C _pu, which measure larger-the-better and smaller-the-better process capabilities. Obviously, the formulae for the two indices C _pl and C _pu are easy to understand and straightforward to apply. Thus, indices C _pl and C _pu have been utilized by a number of Japanese companies and the U.S. automotive industry by Ford Motor Company. Boyles (1991, Journal of Quality Technology. 23: 17–26) and Spring (1995, Total Quality Management 6(3): 427–438.) point out that as soon as and S control charts are in statistical control, the control charts of process capability indices can be used to monitor the quality of process. In the previous, we know that if the process is not in control, the process capability index control chart can be used to monitor the differences of process capability, and as soon as the process is in control the stable process capability can be identified. Therefore, process capability index control chart not only can be used to monitor the stability of process’s quality but also can be used to monitor the quality of process. Since Boyles (1991, Journal of Quality Technology 23: 17–26.) and Spiring (1995, Total Quality Management 6(1): 21–33.) had had research about control chart of the bilateral specification index C _pm., but there are many kinds of products, which meet unilateral quality specification. Therefore, we will construct the control chart of unilateral specification index C _pl and C _pu to monitor and evaluate the stability of process and process capability.     

Accurate test limits under nonnormal measurement error

When screening a production process for nonconforming items the objective is to improve the average outgoing quality level. Due to measurement errors specification limits cannot be checked directly and hence test limits are required, which meet some given requirement, here given by a prescribed bound on the consumer loss. Classical test limits are based on normality, both for the product characteristic and for the measurement error. In practice, often nonnormality occurs for the product characteristic as well as for the measurement error. Recently, nonnormality of the product characteristic has been investigated. In this paper attention is focussed on the measurement error. Firstly, it is shown that nonnormality can lead to serious failure of the test limit. New test limits are therefore derived, which have the desired robustness property: a small loss under normality and a large gain in case of nonnormality when compared to the normal test limit. Monte Carlo results illustrate that the asymptotic theory is in agreement with moderate sample behaviour.     

超短波数传设备的关键技术指标分析

超短波数据链的发展使得高速超短波数传设备的研制倍受关注，超短波数传设备能实现的最快速率、系统灵敏度等指标成为设备研制者关注的问题。根据香农的信息容限理论和超短波设备的噪声系数在理论上对超短波数传的灵敏度、系统信息容限进行了分析。分析结果表明，白噪声干扰条件下的系统灵敏度受噪声系数、温度、信号带宽的影响；系统带宽较窄时，系统信息容限和带宽成正比，频带利用率高；带宽增加到一定程度后容量不再随带宽变化，频带利用率降低到接近0。