Transient and turbulent mass transfer in rotating shallow electrochemical cells

Turbulent mass transfer in a rotating shallow electrochemical cell was investigated experimentally. Six local miniprobes embedded in the cathode were used to measure the local mass transfer rate and to detect unsteady turbulent convection. The mass transfer rates were nondimensionalized and correlated. A critical parameter was obtained to describe the onset of transient and turbulent conditions in the rotating electrochemical cells. The transient and turbulent phenomena in the rotating system are more complex than natural convection in vertical enclosures because of gravity-gradient effects.     

A novel concept for a renewable network within municipal energy systems

Renewable energy sources are amongst the more widely acceptable options for the future transformations of existing energy systems. The complexities of such transformations call for various comprehensive preparatory actions. Amongst them, the organisation of a multifaceted renewable value-chain into a renewable network may well be crucial for the successful utilisation of renewable energy sources in the future. This paper proposes a novel concept for renewable network covering entire renewable value chain with division on supply, demand and technology sections. In the past, each section has been addressed separately. The organisation of renewable network covering all sections is deemed to be vital for accomplishing the optimal distribution and deployment of renewable energy sources. Constant technological advancements within the renewable sector indicate the significance of a technology section within a renewable network. The appropriate arrangement of various stakeholders involved throughout the entire value-chain, which includes all sections of a renewable network, is therefore crucial for the further development of a renewable sector. The proposed concept of a renewable network would support the effective operation of a renewable value-chain within a municipality through the establishment of local virtual energy cooperatives aimed at fulfilling energy needs and supporting the development of the community. The applicability of the proposed concept is demonstrated through the development of a biomass network within the municipality of Cirkulane, Slovenia.     

最弱链模型估算局部脆性区尺寸对焊接热影响区断裂韧度的影响

从最弱链模型的物理本质出发，探讨了影响焊接热影响区脆性断裂的主要因素。在一定的断裂韧度前提下，随着局部脆性尺寸的增加，焊接热影响区的脆断概率增加。当断裂概率一定时，局部脆性区尺寸增加，焊接热影响区断裂韧度下降。文中讨论了最弱链模型中各参数对断裂概率密度及断裂韧度值分布的影响。．     

一种新型校园社区网建设方案

提出了一套校园网建设方案,通过该方案的实现,使教职员工可用一张201卡进行语音通信和上网.极大地方便了师生的工作和学习;同时通过灵活的计费策略,很好地解决了学生上网对网络资源和宽带过渡占用的问题.保证了网络资源得以充分的利用.     

单体支柱工作面顶板动态的监报

本文提出顶板动态监报应包括回采工作面局部冒顶的监报及顶板来压的预报这两个方面的观点。初步给出了局部冒顶监报指标的确定方法;重点探索了采用回采工作面来压综合判断指标来预报顶板来压的可能性。文中所给的回采工作面局部冒顶的监报指标及顶板来压预报指标所采用的系数,基于现场统计资料,或现场经验的数学处理结果。     

基于本地电气量的无故障跳闸新判据

传统的无故障跳闸判据只检测线路上潮流的突然变化，在潮流转移后线路轻载时容易导致稳定控制装置的误动。文中分析了不同情况下线路首端测量阻抗的特性，揭示了装置安装处的测量阻抗值在线路无故障跳闸时和潮流转移时具有明显差异的机理，提出了基于本地电气量计算出的测量阻抗的无故障跳闸新判据，并用数字仿真验证其有效性。     

实物设计为依托的单片机课程体系改革

“单片机原理及应用”作为高校电子类专业的必修课，以单片机为控制器在课程设计、学科竞赛、毕业设计中应用非常广泛。利用热转印或感光制版技术完成PCB制作，以实物设计为依托构建单片机理论实践一体化教学模式，将单片机与多课程融合应用于地方院校电气电子类专业应用型人才的培养中，提升了学生的电路设计与调试能力，对于单片机课程体系的改革有一定的借鉴作用。     

哈尔滨濒危历史建筑遗产保护研究

为探讨在文化全球化背景下保护哈尔滨濒危历史建筑遗产的方法,论文从分析这些建筑遗产的文化基础、发展历程入手,揭示了这些建筑遗产的艺术价值,并提出了具体的保护建议。论文指出保护这些外来文化与哈尔滨地域特点融合的建筑遗产将有助于保持地域建筑文化的多样性。     

浅谈计算机局域网方案设计及应用系统开发

介绍了新余钢铁有限责任公司计算机局域网建设的网络选型、网络组建、软硬件的选用、应用系统的开发及拨号路由器的应用，对企业局域网的建设具有一定的参考价值。     

实现装备技术保障资源可视化的方案研究

为适应未来高技术条件下的局部战争，赢得战争的主动权，依靠GPS(全球定位系统)的定位功能和GSM(全球移动通讯系统)网、移动通讯车的通讯功能，结合实际情况和未来战场装备保障的发展趋势，设计了一个可视化方案。