Performance of Catalytically Active Membrane Reactors with Different A/V Ratios

Although the performance of membrane reactors (MR) is highly affected by the ratio of membrane area-to-reaction volume, there are few studies on this effect owing to the difficulties associated with reactor manufacture. In this study, an MR with high A/V ratio, a diameter of 35 m, and a height of 0.8 mm was fabricated. Separation performance of this MR was investigated in an n-butanol/water system. Esterification of acetic acid and n-butanol was used as the model reaction to investigate the performance of catalytically active membrane reactors (CAMR) with different A/V ratios. The reaction conversion was 38.59% in the CAMR with the high A/V ratio of 12,497/m, which was much higher than that in other CAMRs, for reaction time of 60 min and W/Vfratio of 0.093 g/mL. Excellent catalytic stability of the CAMR was confirmed by performing long-term stability experiments. © 2017 Tianjin University and Springer-Verlag GmbH Germany

Wearable and interactive multicolored photochromic fiber display

Endowing flexible and adaptable fiber devices with light-emitting capabilities has the potential to revolutionize the current design philosophy of intelligent,wearable interactive devices.However,significant challenges remain in developing fiber devices when it comes to achieving uniform and customizable light effects while utilizing lightweight hardware.Here,we introduce a mass-produced,wearable,and interactive photochromic fiber that provides uniform multicolored light control.We designed independent waveguides inside the fiber to maintain total internal reflection of light as it traverses the fiber.The impact of excessive light leakage on the overall illuminance can be reduced by utilizing the saturable absorption effect of fluorescent materials to ensure light emission uniformity along the transmission direction.In addition,we coupled various fluorescent composite materials inside the fiber to achieve artificially controllable spectral radiation of multiple color systems in a single fiber.We prepared fibers on mass-produced kilometer-long using the thermal drawing method.The fibers can be directly integrated into daily wearable devices or clothing in various patterns and combined with other signal input components to control and display patterns as needed.This work provides a new perspective and inspiration to the existing field of fiber display interaction,paving the way for future human–machine integration.

2018年上海市一起D8基因型麻疹病毒引起的输入性麻疹暴发报告

目的追踪2018年上海市一起输入性麻疹暴发的来源,并分析其病毒分子流行病学特征。方法直接从临床咽拭子标本中提取病毒核酸,采用一步法反转录–聚合酶链式反应,扩增麻疹病毒核蛋白基因COOH末端676个核苷酸,然后对扩增产物进行核苷酸序列测定,并分析其同源性,以确定病毒基因型及其可能的来源。结果本次暴发病例来自于同一家庭,且2例成年人病例在发病前21 d内有共同的出境旅游史;导致此次暴发的麻疹病毒为D8基因型。结论结合流行病学调查和实验室检测结果,推断此次疫情为一起D8基因型麻疹病毒引起的输入性麻疹暴发。

面向个人热管理的降温纺织品

高温环境下人体的局部微环境热调控对人类健康具有重大意义.纺织品作为人体与外界环境的一道防护屏障,对个人的热舒适管理有重要作用.普通纺织品由于缺乏高效的温度调控机制,难以应对周围环境的剧烈温度变化,尤其是在高温场景下如何实现有效的降温是亟须解决的难题.通过物理光学、材料科学和纺织工程等多学科交叉融合而衍生的降温纺织品,有望以更加有效和个性化的方式满足个体温度的调节需求,将通过多学科交叉创新的科学研究助力体育运动与医疗健康的智能化发展.本文重点讨论了降温纺织品的基本机制、研究进展和应用场景,阐述其发展方向和产业化潜力,并展望降温纺织品在多元化运动和智能化医疗中的广阔前景.

Fabric computing: Concepts, opportunities, and challenges

With the advent of the Internet of Everything,people can easily interact with their environments immersively.The idea of pervasive computing is becoming a reality,but due to the inconvenience of carrying silicon-based entities and a lack of fine-grained sensing capabilities for human-computer interaction,it is difficult to ensure comfort,esthetics,and privacy in smart spaces.Motivated by the rapid developments in intelligent fabric technology in the post-Moore era,we propose a novel computing approach that creates a paradigm shift driven by fabric computing and advocate a new concept of non-chip sensing in living spaces.We discuss the core notion and benefits of fabric computing,including its implementation,challenges,and future research opportunities.

Fundamental Neurocircuit of Anti-inflammatory Effect by Electroacupuncture Stimulation Identified

As an important part of Traditional Chinese Medicine,acupuncture has the history of several thousand years in China and has been widely applied and accepted in clinical practice llover the world.Modern randomized clinical rials have demonstrated the effectiveness of acupuncture in treating a range of ailments,including gastrointestinal disorders and stress urinary incontinence[1,2].

High-throughput first-principle prediction of collinear magnetic topological materials

The success of topological band theory and symmetry-based topological classification significantly advances our understanding of the Berry phase.Based on the critical concept of topological obstruction,efficient theoretical frameworks,including topological quantum chemistry and symmetry indicator theory,were developed,making a massive characterization of real materials possible.However,the classification of magnetic materials often involves the complexity of their unknown magnetic structures,which are often hard to know from experiments,thus,hindering the topological classification.In this paper,we design a high-throughput workflow to classify magnetic topological materials by automating the search for collinear magnetic structures and the characterization of their topological natures.We computed 1049 chosen transition-metal compounds(TMCs)without oxygen and identified 64 topological insulators and 53 semimetals,which become 73 and 26 when U correction is further considered.Due to the lack of magnetic structure information from experiments,our high-throughput predictions provide insightful reference results and make the step toward a complete diagnosis of magnetic topological materials.