Modulation of electrical transport in calcium cobaltite ceramics and thick films through microstructure control and doping

Ca₃Co₄O₉ is a promising p-type thermoelectric oxide material having intrinsically low thermal conductivity. With low cost and opportunities for automatic large scale production, thick film technologies offer considerable potential for a new generation of micro-sized thermoelectric coolers or generators. Here, based on the chemical composition optimized by traditional solid state reaction for bulk samples, we present a viable approach to modulating the electrical transport properties of screen-printed calcium cobaltite thick films through control of the microstructural evolution by optimized heat-treatment. XRD and TEM analysis confirmed the formation of high-quality calcium cobaltite grains. By creating 2.0 at% cobalt deficiency in Ca_2.7Bi_0.3Co₄O_9+δ, the pressureless sintered ceramics reached the highest power factor of 98.0 μWm^?1 K^-2 at 823 K, through enhancement of electrical conductivity by reduction of poorly conducting secondary phases. Subsequently, textured thick films of Ca_2.7Bi_0.3Co_3.92O_9+δ were efficiently tailored by controlling the sintering temperature and holding time. Optimized Ca_2.7Bi_0.3Co_3.92O_9+δ thick films sintered at 1203 K for 8 h exhibited the maximum power factor of 55.5 μWm^?1 K^-2 at 673 K through microstructure control.     

简化形式的系统EMC预测分析技术概述

本文探讨了系统级简化形式的电磁兼容性预测分析方法，该方法对于只有几对发-收干扰对的系统EMI的预测分析简洁有效，它避免了大系统间繁复的建模与大量的数据采集及其计算工作，从而对于只考虑其结果的系统间的EMC预测分析提高了效率。     

DS90C363/DS90CF364 LVDS发送/接收器在数字RGB液晶屏上的应用

通过在FPD铁路上使用LVDS技术可使具有数字RGB接口的液晶显示屏的工作距离大大增加。文章通过一个具体应用环境介绍了21位LVDS发送器/接收器DS90C363/DS90CF364传输套片的主要特性、引脚功能、工作原理，同时指出了在具体设计使用时的注意事项。     

PLC的大型牵伸卷绕机的应用研究

本文介绍了大型牵伸卷绕机的计算机控制系统，以西门子MMV型变频器为驱动装置，西门子PLC300为控制核心，根据西门子USS协议和MPI协议，实现PLC与变频器、TP27触摸显示屏的通信，取得了较高的控制精度和稳定性，充分满足生产过程的需要，具有广阔的应用前景。     

Glucose and Internal Cooking Temperature Effects on Low Fat, Pre- and Post-Rigor, Restructured Beef Roasts

Muscles were excised pre-rigor (hot-boned, HB) or post-rigor (conventionally boned, CB), chunked, and were subjected to four ingredient treatments: (SPE) 2% NaCl, 0.5% NaCl, 0.5% phosphate, 2% glucose (SP 2% NaCl, 0.5% phosphate (SG) 2% NaCl, 2% glucose and (PG) 0.5% phosphate, 2% glucose to produce low fat, restructured, beef roasts, which were cooked to an internal temperature of 63 or 93°C. Addition of glucose to a salt and phosphate (LEM-O-FOS¹) ingredient treatment as well as cooking to 93°C helped maintain low warmed-over flavor (WOF) scores and kept thiobarbituric acid values below threshold (< 1.0) while maintaining desirable consumer acceptability scores.     

粒度控制——页岩、煤矸石空心砖原料制备的关键

阐述了页岩、煤矸石的原料粒度对制砖性能的影响,介绍了几种典型的控制颗粒粒度的工艺方案;简要分析了几种筛分机械的优缺点,着重介绍MVS电磁振动高频振网筛在几个使用现场的应用结果,为制砖企业解决原料生产的难题提供了办法。     

筛查基因突变的新技术——循环双脱氧指纹图谱法及其应用

建立了适用于大批量标本基因突变筛查的双脱氧指纹图谱法即ｄｄＦ。该技术民测定ＤＮＡ序列的双脱氧末端终止法及ＳＳＣＰ二者长处于一身，即只作一个双脱氧末端终止反应，然后将反应产物在与ＳＳＣＰ相同的电泳条件下进行聚丙烯酰胺凝胶电泳，这样有突变的样品不会漏检，阳性检出率高达１００％。     

词汇、语法和传情达意--一个湖边餐厅的习作

建筑设计往往是以传达情感为最终目的，因此语言的简单和熟练便显得愈发的重要。这个餐厅的设计尝试以简单的词汇组成直截的语言，力图清晰明确的传递建筑师的情感。     

基于ARM的校园LED公告板远程控制系统设计

针对传统的单个LED显示屏的控制的问题．开发基于ARM器件使用触摸屏技术和Zig—Bee无线传输技术的校园LED公告板远程控制系统。     

Group‐in‐a‐Box Meta‐Layouts for Topological Clusters and Attribute‐Based Groups: Space‐Efficient Visualizations of Network Communities and Their Ties

An important part of network analysis is understanding community structures like topological clusters and attribute‐based groups. Standard approaches for showing communities using colour, shape, rectangular bounding boxes, convex hulls or force‐directed layout algorithms remain valuable, however our Group‐in‐a‐Box meta‐layouts add a fresh strategy for presenting community membership, internal structure and inter‐cluster relationships. This paper extends the basic Group‐in‐a‐Box meta‐layout, which uses a Treemap substrate of rectangular regions whose size is proportional to community size. When there are numerous inter‐community relationships, the proposed extensions help users view them more clearly: (1) the Croissant–Doughnut meta‐layout applies empirically determined rules for box arrangement to improve space utilization while still showing inter‐community relationships, and (2) the Force‐Directed layout arranges community boxes based on their aggregate ties at the cost of additional space. Our free and open source reference implementation in NodeXL includes heuristics to choose what we have found to be the preferable Group‐in‐a‐Box meta‐layout to show networks with varying numbers or sizes of communities. Case study examples, a pilot comparative user preference study (nine participants), and a readability measure‐based evaluation of 309 Twitter networks demonstrate the utility of the proposed meta‐layouts.