精细化煤质管理的研究与应用

针对王家塔煤矿的煤炭资源和生产现状，为保证矿井煤质稳定，结合矿井现状，从技术和管理两方面出发，采用现场管理和技术手段相结合方法，实现矿井的“产—运—销”有机联动。该方法能及时发现问题，快速解决问题，达到“保煤质，促销售，带发展“的效果，从而改变传统的粗放型煤质管理办法，实现精细化煤质管理。实践证明，精细化煤质管理的方法，能将煤质波动控制在418.6 J/g以内，达到了预期效果。     

基于 BIM 的 EPC 项目价值增值研究

BIM 在发达国家广泛应用的实践经验表明能有效提高项目建设的生产效率。基于 BIM 和价值链理论，探讨 BIM 理念及相关技术在 EPC 项目价值链的各增值环节的重要作用，提出以 BIM 为基础，对 EPC 项目建设各环节的活动进行强化以提高项目质量和生产效率，对设计采购施工并行建设优化降低项目成本，为实现 EPC 项目价值增值提供手段和途径，也为业主、总承包商和其他利益相关方更好地创造价值和获取利润奠定基础。     

基于开源技术的城市地理信息平台构建方法研究

摘 要：针对城市地理信息平台构建过程中存在的数据获取困难、研发成本较高等问题， 引入开源技术，对基于开源数据、开源开发平台与开源工具的城市地理信息平台构建技术进行 研究。所提出的城市地理信息平台由数据模块与可视化模块 2 部分组成。为构建数据模块，由 开源地理信息项目(OSM)获取了建筑与区划数据，并设计了建筑合并算法以提升数据质量。建 筑数据随之基于行政区划分级存储，通过由 ASP. NET 构建的数据接口提供给具体应用。可视 化模块则基于开源地理信息系统(GIS)项目 Cesium 实现，并设计了完善的用户界面。以北京市 为例，完成了原型系统的开发与测试，证实了该技术体系的可行性，通过开源技术降低平台研 发成本，推进城市地理信息平台的研究与应用。     

基于工程教育专业认证的数字电子技术课程的改革

工程教育专业认证是高校走向国际化的必经之路,数字电子技术课程是一门应用类型的电气信息类基础课,也是近十几年来发展最快的技术。结合工程教育专业认证对电子信息类专业本科毕业生的十二条通用要求,结合现代教学方法,促进理论与实践融合,在课程理论教学内容的组织方面、实践项目设计方面、教学方法上进行了改革。实践证明,改革提高了学生学习的趣味性、锻炼培养了学生的工程技能和素养。     

Should medium-sized contractors still implement home-made information technologies on construction sites?

Despite the increasing dissemination of the Building Information Modeling (BIM) approach, many firms are still far from BIM and are only starting to adopt information technologies. We conducted an ethnographic action research with an industrial partner that implements information technologies on its construction sites, with a strong preference for home-made applications. Results show that the development of such applications faces difficulties and that multiple iterations and versions are necessary before achieving the expected goals because the required competencies are lacking among internal development teams. Moreover, initial needs evolve considerably throughout the application’s development and evaluation process. However, notwithstanding the difficulties encountered during the different application development phases, the industrial partner believes the decision to be worthwhile because of the desire to have internal control over the project data and the need to consider certain specificities related to business processes.     

How to perform and report an impactful analysis using partial least squares: Guidelines for confirmatory and explanatory IS research

Partial least squares path modeling (PLS-PM) is an estimator that has found widespread application for causal information systems (IS) research. Recently, the method has been subject to many improvements, such as consistent PLS (PLSc) for latent variable models, a bootstrap-based test for overall model fit, and the heterotrait-to-monotrait ratio of correlations for assessing discriminant validity. Scholars who would like to rigorously apply PLS-PM need updated guidelines for its use. This paper explains how to perform and report empirical analyses using PLS-PM including the latest enhancements, and illustrates its application with a fictive example on business value of social media.     

信息技术设备电气间隙、爬电距离的设计与测量

电气间隙和爬电距离是信息技术设备的一项重要电气安全指标,由于其涉及的因素较多,导致产品设计人员和检测人员容易出错。本文详细介绍了电气间隙和爬电距离的定义、如何计算不同绝缘的限值,并结合日常检测中遇到的常见问题进行了详细的说明、提出了相应改进建议。     

考虑边信息的多层贝叶斯需求预测模型

随着工业互联网经济的发展,需求的不确定性日益增大,为提高需求预测的准确性,提出一个考虑边信息的多层贝叶斯需求预测模型(DFSI)。DFSI模型通过构造隐层的网络结构以实现对客户需求更加精确的刻画,该隐层结构主要包含两组参数:一组用于描述客户需求在时间上固有的连续性特征,另一组则用于融合相关的边信息特征。进一步,以贝叶斯推断为理论基础,以最大化后验概率为目标,推导出了DFSI的优化目标,并基于梯度下降方法设计了相应的求解算法。使用京东商城及某制造企业的真实销售数据对提出的模型进行了检验。结果显示,与常用的需求预测模型相比,DFSI能获得更好的预测结果。     

基于测绘地理信息技术的涉地税源风险识别模式应用研究

为解决沧州市涉地税源管理手段单一等问题,文中提出以测绘地理信息技术为支撑,通过对多源数据组织管理,建立风险分析指标,采用多种GIS空间分析方法构建了涉地风险税源识别模式并在沧州进行应用。结果表明:该模式能有效识别多种涉地风险,为涉地税源管理提供了支撑。     

Determinants of consumers’ continuance intention to use social recommender systems: A self-regulation perspective

Social recommender systems have transformed how consumers seek product- or service-related information. Based on Bagozzi's self-regulation framework, this study examines the determinants of consumers' continuance intention to use social recommender systems. We found that appraisal factors (perceived information quality and perceived system quality) are strong predictors of emotional reaction (recommendation satisfaction and trust in recommendation). Particularly, perceived information quality has a significant effect on both recommendation satisfaction and trust in recommendation. However, the positive effect of perceived system quality is only on recommendation satisfaction. Both recommendation satisfaction and trust in recommendation positively affect consumers' continuance intention to use social recommender systems.