基于MES现场数据收集模型的研究与应用

基于MES的内涵、功能模块和技术架构,给出了电信设备供应商对现场数据自动收集的模型,通过上海贝尔股份有限公司的案例分析,借助计算机编程技术,将该模型在实际运营中得到了体现,最后,给出了该模型在实际生产运营中的效能评估。

基于MES的现场数据收集模型的研究与应用

电信设备供应商对于已投入现场运营的通讯设备的软硬件信息把握都比较薄弱,而这些信息恰恰是工业和信息化部提倡的"主动式维护"的基础数据;同时,这些信息也是电信设备供应商进行二次销售、设备更新和设备质量监控的最为关键的数据,如何及时、准确、没有遗漏地得到现场运营通讯设备的软硬件信息是电信设备供应商一直无法很好解决的问题。本文基于MES的内涵、功能模块和技术架构,给出了电信设备供应商对现场数据自动收集的模型。通过上海贝尔股份有限公司的案例分析,借助计算机编程技术,将该模型在实际运营中得到了体现,给出了该模型在实际生产运营中的效能评估。

网格移动无线传感网生存时间优化算法刍议

在微处理器与无线通信技术不断发展的背景下,为了解决无线传感器网络中覆盖与联通的问题,采用了正六边形网格划分方法来同构无线传感器网络网格的划分、分布,优化其生存时间的算法,进而解决不同状态下的节点能耗分布不均衡、能量空穴等问题。本文结合Sink节点移动的算法(GLOA),通过对监测区域进行同等网格划分、建立Sink移动路径的优化选择模型,对Sink移动或静态的收集方法进行数据的采集进行分析,达到延长网络的生存时间、降低数据收集的时延,进而推动无线传感器网格移动划分的发展运用。

Evaluating the impact of spatio-temporal scale on CPUE standardization

This study focused on the quantitative evaluation of the impact of the spatio-temporal scale used in data collection and grouping on the standardization of CPUE(catch per unit effort).We used the Chinese squid-jigging fishery in the northwestern Pacific Ocean as an example to evaluate 24 scenarios at different spatio-temporal scales,with a combination of four levels of temporal scale(weekly,biweekly,monthly,and bimonthly)and six levels of spatial scale(longitude×latitude:0.5°×0.5°,0.5°×1°,0.5°×2°,1°×0.5°,1°×1°,and 1°×2°).We applied generalized additive models and generalized linear models to analyze the24 scenarios for CPUE standardization,and then the differences in the standardized CPUE among these scenarios were quantified.This study shows that combinations of different spatial and temporal scales could have different impacts on the standardization of CPUE.However,at a fine temporal scale(weekly)different spatial scales yielded similar results for standardized CPUE.The choice of spatio-temporal scale used in data collection and analysis may create added uncertainty in fisheries stock assessment and management.To identify a cost-effective spatio-temporal scale for data collection,we recommend a similar study be undertaken to facilitate the design of effective monitoring programs.

Establishment of water source discrimination model in coal mine by using hydrogeochemistry and statistical analysis： a case study from Renlou Coal Mine in northern Anhui Province, China

The demand for energy consumption promotes to find more coal in deep underground up to 1 000 m and brings more serious situation of water disaster. As one of the major methods for water disaster control, hydrogeochemistry attracts a series of studies related to water source discrimination. In this paper, a simple method for constructing the water source discrimination model based on major ions and multivariate statistical analysis was reported using the following procedures： （1） collection of data and interpretation, （2） analysis of controlling factors based on the chemical composition of groundwater, （3） ＂pure＂ sample chosen, and （4） discrimination model establishment. After the processes, two functions and a diagram were established for three aquifers （the Quaternary, Coal bearing, and Taiyuan Fm.） from the Renlou Coal Mine in northern Anhui Province, China. The method can be applied in almost all coal mines and can be used for evaluating the contribution ratios if the water is collected from a mixing source.

An Action Research of Using Problem-Centered Double-Cycles Instructional Model to Implement ModeI-Elicitng Activity

The purpose of the study was to use the Problem-Centered Double-Cycles Instructional Model （PCDC-IM） （1995, Chang） to help the teacher （Lin） implement model-eliciting activity （MEA） in her mathematics classes. In this study, there were 31 students divided in 10 groups and engaged in the MEA ＂Who saved the oriental cherry trees＂. Data collections included the learning sheets, journals and debriefing forms of students, teaching and reflection journals, observation reports, and field notes of teachers, reflection journals and interview reports of researchers, video tapes and records of the classes and meetings. There were four parts of the teaching cycle in PCDC-IM, namely task, guidance, environment and analysis. We summarized developing and implementing the MEA in ＂Task＂ aspect, 5 principles and 5 kinds of teachers＇ roles in ＂Guidance＂ aspect, 2 elements and 5 features in ＂Environment＂ aspect and data in ＂Analysis＂ aspect. The findings showed that PCDC-IM was helpful for mathematics teachers who want to change their instruction from lecture into modeling teaching.

Survival analysis of car travel time near a bus stop in developing countries

This paper presents an important investigation into car travel time affected by mixed traffic flow near a bus stop on the basis of survival analysis theory.Travel time data associated with mixed traffic characteristics near a bus stop were collected by video cameras.A hazard-based duration model was introduced to analyze the effects of mixed traffic flow on car travel time.The results indicate that mixed traffic flow impacts car travel time significantly.And the presence of bus berthing violation would delay car travel time.The proposed model can be used to forecast temporal shifts in car travel time due to changes in mixed traffic flow.The influential factors related to mixed traffic flow should be given full consideration in the planning and designing of bus stops in developing countries.