一种可自定义金额的数字货币去中心化混淆方案

区块链是随比特币等数字货币兴起的一种全新的去中心化架构,具有去信任化的特点.在区块链中用假名来提供匿名性,然而研究表明这种匿名并不安全,通过交易图谱分析可以发现不同假名间的关联性,找到同一用户的假名,破坏匿名性.通过地址的混合可以解决这一问题.本文提出了一种去中心化的混币方法,通过分析证明,该方法能有效地保障用户的隐私...     

Servitization of manufacturing in the new ICTs era: A survey on operations management

Servitization of manufacturing has become one of the main pathways for transition and upgrade in the manufacturing industry. New information and communication technologies (ICTs), such as the Internet of Things, Big Data, and Cloud Computing have enabled the servitization of manufacturing in terms of value creation, resource management, and supply chain management. This study presents a comprehensive review on the servitization in operations management in the era of new ICTs. A new value chain framework is proposed under the business model that revolves around servitization, which showcases the new activities and ways of implementation in the era of new ICTs. The virtualization, configuration, and evaluation of integrated manufacturing and service resources are analyzed. In particular, the methods used in new ICT-supported resource management platforms are surveyed. Problems in the supply chain management in manufacturing services (including the selection of partners, as well as the coordination, planning, and scheduling among members) are presented. This study concludes with a discussion on state-of-the-art servitization in operations management in the era of new ICTs.     

地方应用型本科院校全价值链创新创业教育融通机制研究

全面实现专业教育与创新创业教育的有机融合是地方应用型本科院校转型的重要途径.当前,专业教育与创新创业教育的融合具有片面化、碎片化和表面化的特征,不利于人才培养目标的达成.专业教育与创新创业教育的全价值链融通能够解决这些问题,在融合的过程中应坚持价值准则、行为准则和方式准则,在此基础上才能实现专业教育与创新创业教育的全教...     

企业社会责任下考虑促销投入的供应链优化决策

基于企业社会责任的现实背景,首先研究集中式供应链中考虑企业社会责任的情形,然后研究零售商承担企业社会责任下的分散式情形和收益共享契约情形的最优决策.研究结果表明:集中式情形下供应链的最优利润关于企业社会责任关注水平递减.在分散式情形下,零售商的最优利润关于企业社会责任关注水平递减,而制造商的最优利润关于企业社会责任关注水平递增.在收益共享契约情形时,当收益共享系数相对较小或较大时,零售商的最优利润关于企业社会责任关注水平递增,而当收益共享系数在中间的给定区间时,零售商的最优利润关于企业社会责任关注水平递减,制造商的最优利润关于企业社会责任关注水平递增.当零售商的企业社会责任关注水平较低时,社会总福利随着企业社会责任关注水平递增;当零售商的企业社会责任关注水平较高时,社会总福利随着企业社会责任关注水平递减.最后进行算例分析,并给出一些管理启示.     

车联网中路边设施的分布式调度策略的研究

为了降低碳排放量和部署成本,利用太阳能给车联网路边设施(Road Side Unit, RSU)供电是一个可行的方法.本文针对太阳能供电的RSU,提出了两个分布式的在线调度策略,旨在最大化服务车辆数.在基于Markov链的调度策略中,采用Markov链表述RSU能量状态,并通过对动作的奖励最大化服务的车辆数;在基于阈值的调度策略中,RSU计算服务车辆时所消耗的能量,并结合自己的能量状态,选择服务的车辆.仿真结果表明,本文提出的在线调度策略增加了服务车辆数.     

煤层钻孔风力排渣模拟实验研究

基于两相流的有关原理对煤层钻孔风力排渣进行了研究,结合现场情况,建立了煤层钻孔风力排渣实验装置,对风力排渣进行模拟实验．测定了排渣系统中各段的压力损失,分析了各段压力损失的比重,研究了风量、风速、钻屑运动速度、固气比和压力损失等之间的内在规律．结合理论分析得出了最小排渣风速公式,该公式反应了煤层瓦斯突出钻屑量指标、钻孔直径、钻杆直径、钻进速度等参数对排渣过程的影响．实验得出的结论为现场选择设备型号提供了理论依据．     

5修-铕油酸长链配合物的性质研究

本文合成了以Eu3+为中心离子,芳香羧酸、邻菲咯啉和噻酚甲酰三氟丙酮为第一配体,油酸为第二配体的七种新的铕三元荧光配合物。通过红外光谱分析、紫外光谱分析、元素分析、EDTA配位滴定分析以及电导率的测定对铕三元荧光配合物的组成及结构进行表征。通过荧光光谱分析,确定了铕三元荧光配合物的最佳激发波长,在最佳激发波长下测定了它们的发射光谱。结果表明,所有铕三元荧光配合物的荧光发射光谱均相似,发出了铕离子的5D0-7F2,5D0-7F1,5D0-7F0(很弱)特征光,荧光表现为红色。在含油酸配体的铕三元荧光配合物中,各第一配体向铕离子传递光能的能力为:邻菲咯啉>噻吩甲酰三氟丙酮>大茴香酸>间氯苯甲酸>苯甲酸>对甲基苯甲酸>对羟基苯甲酸。     

Automatic text summarization based on textual cohesion

This paper presents two different algorithms that derive the cohesion structure in the form of lexical chains from two kinds of language resources HowNet and TongYiCiCiLin. The re-search that connects the cohesion structure of a text to the derivation of its summary is displayed. A novel model of automatic text summarization is devised,based on the data provided by lexical chains from original texts. Moreover,the construction rules of lexical chains are modified accord-ing to characteristics of the knowledge database in order to be more suitable for Chinese summa-rization. Evaluation results show that high quality indicative summaries are produced from Chi-nese texts.     

Molecular Hydrogen Enhances Proliferation of Cancer Cells That Exhibit Potent Mitochondrial Unfolded Protein Response

Molecular hydrogen ameliorates pathological states in a variety of human diseases, animal models, and cell models, but the effects of hydrogen on cancer have been rarely reported. In addition, the molecular mechanisms underlying the effects of hydrogen remain mostly unelucidated. We found that hydrogen enhances proliferation of four out of seven human cancer cell lines (the responders). The proliferation-promoting effects were not correlated with basal levels of cellular reactive oxygen species. Expression profiling of the seven cells showed that the responders have higher gene expression of mitochondrial electron transport chain (ETC) molecules than the non-responders. In addition, the responders have higher mitochondrial mass, higher mitochondrial superoxide, higher mitochondrial membrane potential, and higher mitochondrial spare respiratory capacity than the non-responders. In the responders, hydrogen provoked mitochondrial unfolded protein response (mtUPR). Suppression of cell proliferation by rotenone, an inhibitor of mitochondrial ETC complex I, was rescued by hydrogen in the responders. Hydrogen triggers mtUPR and induces cell proliferation in cancer cells that have high basal and spare mitochondrial ETC activities.     

数控多线切割技术及发展趋势

数控多线切割技术实现了集成电路制造技术的跨越式发展,已成为数控机床制造技术及集成电路制造技术的重要标志,引起了发达国家的广泛重视。论述了数控多线切割技术的特征;介绍了我国自行研制的XQ120和XQ300系列数控多线切割机床并与国外产品进行比较;指出了开发大型数控多线切割机床的技术难点;阐述了我国研发具有自主知识产权的大型数控多线切割机床设备的必要性。