Fabrication of crescent-shaped ceramic microparticles based on single emulsion microfluidics

Ceramic microparticles have great potentials in various fields such as materials engineering, biotechnology, microelectromechanical systems, etc. Morphology of the microparticle performs an important role on their application. To date, it remains difficult to find an effective and controllable way for fabricating nonspherical ceramic microparticles with 3D features. This work demonstrates a method that combines UV light lithography and single emulsion opaque-droplet-templated microfluidic molding to prepare the crescent-shaped ceramic microparticles. By tailoring the intensity of UV light and flow rate of fluid, the shapes of microparticles are accordingly tuned. Therefore, varieties of crescent-shaped microparticles and their variations have been fabricated. After sintering, the crescent-shaped alumina ceramic microparticles were obtained. Benefitting from the light absorption and scattering behavior of most ceramic nanoparticles, this system can serve as a general platform to produce crescent-shaped microparticles made from different materials, and hold great potentials for applications in microrobotics, structural materials in MEMS, and biotechnology.     

数控技术在钢铁行业的应用--XK9350数控月牙槽铣床

轧制螺纹钢的轧辊上有月牙槽,并有商标、规格等字符信息.利用数控技术开发的数控月牙槽专用铣床,大大简化了轧辊加工的过程,提高了加工质量,解决了钢铁企业的一大难题.     

Modelling and management of smart microgrid for rural electrification in sub-saharan Africa: The case of Nigeria

Access to electricity is still a challenge in many parts of sub-Saharan Africa. In Nigeria, over 70% of the rural dwellers do not have access to electricity. The purpose of this paper is to examine the potential of a smart microgrid for off-grid rural electrification in Nigeria. A combination of design thinking and model-based design methodology is employed to select a suitable microgrid configuration and to develop a smart microgrid model. A system consisting of a solar photovoltaic array, battery energy storage and a diesel generator is selected, and the model is developed in Simulink. Demand data from 10 rural communities in Nigeria are used to validate the performance of the model and the potential for demand management is considered. The use of energy efficient light bulbs is found to reduce the peak electricity demand of the case study communities by 42 to 76%. Combining the proposed system with the use of LED bulbs makes the system to have 56 to 81% less net present cost than a system with a diesel generator alone and incandescent light bulbs. The proposed smart microgrid is found to be more suitable for off-grid rural electrification in Nigeria than diesel generators which are currently used for off-grid electrification in Nigeria.     

CARR冷中子源物理方案研究

冷中子源是中国先进研究堆(CARR)作为应用平台开展中子散射实验的重要系统。本文建立了可开展冷中子源装置氢系统物理方案研究的计算程序和方法。对影响核发热和冷中子增益的多种因素进行了计算和优化选择,确定了氢系统物理方案。分析结果表明:符合CARR冷中子源自身特点且在国际上具有创新意义的月牙形冷包结构,在核发热量较小的条件下获得了较好的冷中子增益。     

江南小殿构架地域特征初探

该文通过对南、北方小型殿堂的比较，对宋元时期江南建筑的梁架结构和空间关系等所表现出的江南地域特征进行初步地探讨。     

针织月牙花边的边部设计

通过研究分析月牙花边的６ 种不同生产过程及方法, 提出每种生产方法在地组织配置、原料选择、张力调整、边部花梳垫纱安排等方面的设计要求, 从而保证能生产出平整美观的月牙花边。     

命运的轮回生命的隐痛——解读《月牙儿》的叙事裂隙

《月牙儿》的文本隐含多重意蕴，在第一人称叙事模式和与此相应的人物“内部聚焦”的和谐表象下，文本呈现出明显的叙事裂隙，从中既可感受到主人公的宿命感和性格缺陷，也可隐约地窥测到作家本人的某种欲曲折传达的生命隐痛。     

Migration Pattern Process

Within the international community architects are regularly typecast as exporters of predetermined solutions, rarely given the opportunity to respond appropriately, sensitively and effectively to specific and real emergencies. At the core of any impact are people like you and I; their welfare and successful healing creates a catalyst for the community to rebuild lives and esteem. Since 2007, Diploma Unit 7 at the Architectural Association in London, led by Simon Beames and Kenneth Fraser , has been researching the philosophical, social, political, economic and technical response to long-term humanitarian relief and the resocialisation of displaced people and damaged communities in conditions of extreme hardship. Copyright © 2009 John Wiley & Sons, Ltd.     

梁形如月曲如虹--浙江传统建筑月梁的类型与尺度研究

本文运用文献资料、匠师访谈和建筑实例查证三者相互对比验证的方法,对浙江三种月梁——“浙南法式形月梁”、“浙北高扁作月梁”和“浙中冬瓜形月梁”的形制与尺度展开研究,并与宋《营造法式》和苏州《营造法原》中的月梁进行对比,揭示出浙江传统建筑月梁在历史承继性上的不均衡和地域上的混杂性特征。     

Dancing with Entropy

Finding inspiration and drive in the chaos and fragmentation of today's world, Adriaan Geuze and Matthew Skjonsberg of West 8 have developed an approach that they refer to as ‘radical contextualism’. This requires not only a respect for reality and existing conditions, but also an openness to multiple layers of meaning and a wide variety of inputs, whether historic, cultural, anecdotal or even random. Giving themselves over to evolutionary entropy, they work with ingenuity with whatever they encounter.