微矩形槽平板热管的设计制造及性能分析

目前微槽平板热管成为热管研究和开发的重点。文中简要介绍了平板热管的设计要点及制造工艺,并通过实验,对设计制作的平板热管进行了性能测试。得出如下结论:该平板热管具有良好的启动特性和工作特性;在设计中要注意工质与管壳材料的相容性;制作时要严格控制清洗、检漏、充装等关键工序以保证制作质量。     

超高相对分子质量聚乙烯纤维

超高相对分子质量聚乙烯是一种重要的高性能纤维 ,本文介绍了该纤维的制备、结构、性能以及应用等方面的研究情况。     

HL-2M 真空室制造工艺难点分析及优化

根据 HL-2M 真空室结构及运行工况,对 HL-2M 真空室制造过程的工艺难点进行了深入的分析。结 合前期试验段制造经验,优化了真空室制造工艺,细化了真空室产品的制造工艺方案。通过优化后工艺措施的实 施,提高了真空室的制造质量,并为后续磁约束聚变装置真空室的制造积累了大量的经验。     

Performance analysis for assemble-to-order systems with general renewal arrivals and random batch demands

We study multi-product and multi-item assemble-to-order systems under general assumptions on demand patterns and replenish leadtime distributions. We only assume that the demand process of each product being a renewal process, and the replenish leadtimes follow general distributions. Based upon techniques from renewal theory, we developed procedures for approximating key performance measures of these inventory systems, such as average inventory and immediate order fill rate. We also obtain qualitative results that reveal the impacts of changes in demand patterns and leadtime variability upon the performance of the systems.     

Research on reflective zoom system with 3 mirrors

This paper uses the third-order aberration theory to design a reflective zoom optical system. The advantage of this method is that, by solving a set of Seidel aberration coefficient functions, it allows the designer to achieve the initial construction parameters of the optical system, i.e., radii of curvature and separations between mirrors, etc. In order to verify the accuracy of this method, a prototype of a coaxial zoom optical system with three mirrors is designed. This paper introduces the manufacturing process of the prototype in detail, describes the procedures of aligning and experimenting, and analyzes the experiment results in the end. In this way, the feasibility of this method is confirmed.     

Different approaches for fabrication of low-cost electrochemical sensors

Electrochemistry combined with economical and sustainable platforms (such as paper) provides portable, affordable, robust, and user-friendly devices. In general, techniques, such as photolithography and sputtering, are excellent alternatives for producing these platforms. However, owing to the requirement of expensive and sophisticated instrumentation, as well as cleanroom facilities, these techniques have limited access. Thus, the search for easy to use and produce approaches have been reported, using consumables, including adhesives, carbon ink, graphite, pencil, office paper, paperboard, among others. In this sense, in this mini-review, we discuss various strategies explored to fabricate low-cost electrochemical sensors, including its main applications. Different manufacturing methods, such as screen and stencil printing, laser-scribing, and pencil drawing, will be discussed here, emphasizing the performance of the obtained devices, in addition to their advantages and disadvantages.     

Recovery of Phosphate from Steel Manufacture Slag by Sulfuric Acid Treatment

The sulfuric acid treatment on steel manufacture slag (SMS) was performed to recover P resource. P element in SMS was successfully removed. Final products were a solid of CaSO 4 /SiO 2 and a solution containing PO 4 3 m , Fe, Al, Mg, and Mn.     

基于S1000D标准的IETM技术研究

交互式电子技术手册制作过程是一个多技术融合过程,为了研究交互式电子技术手册制作过程中所涉及到的诸多技术,解决手册研制技术过程繁琐复杂以及技术路线不清晰等问题,通过将S1000D标准与IETM手册研制过程相结合,对IETM研制过程中涉及的相关技术进行了详细阐述分析研究,形成满足标准并切合实际的IETM研制技术的合理分类,该研究能有效指导IETM手册制作的顺利开展,提高IETM手册的编制效率,对IETM研制过程技术提升起到积极的促进作用。     

Reactivity of chromium-based pigments in a porcelain glaze

This paper presents a comprehensive investigation at the microscopic scale of various pigments composed of chromium from the French ‘Manufacture de Sèvres’ to establish the origin of color in glazes. Electron microscopy coupled with X-ray diffraction allows the determination of the microstructure and composition of the crystalline phases after firing. X-ray absorption spectroscopy reveals subtle changes in the medium-range ordering around Cr with high spatial resolution, in the pigment grain or at the pigment/glass interface. Principal results indicate systematic and common changes whatever the pigment types: (i) Cr-enrichment for the final crystals, that controls the coloration of the glaze, (ii) migration of specific elements such as Al or Zn from the pigments to the amorphous part of the glaze, and (iii) crystallization of anorthite in the near proximity of the altered Cr-bearing crystalline pigments.