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Room-temperature production of silver-nanofiber film for large-area, transparent and flexible surface electromagnetic interference shielding

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npj Flexible Electronics 2019年第1期3卷 56-63页

作者： Sen Lin haiyang Wang Fan Wu Qingmin Wang Xiaopeng bai Di Zu Jianan Song Dong Wang Zhenglian Liu Ziwei Li Nian Tao Kai Huang Ming Lei Bo Li Hui Wu State Key Laboratory of Information Photonics and Optical Communications and School of Science Beijing University of Posts and Telecommunications100876 BeijingChina State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua University100084 BeijingChina Advanced Materials Institute Shenzhen Graduate SchoolTsinghua University518055 ShenzhenChina School of Mechanical Engineering Nanjing University of Science&Technology210094 NanjingChina

A kind of pollution known as electromagnetic interference(EMI),which results from ubiquitous usage of various electronic communication and military radar equipment,has been receiving increasing attention ***,large-area EMI shielding on transparent and/or curved surfaces,including building windows,curved glass wall,and special requirements spaces(SRSs),remains hard to *** this paper,a silver nanofiber(AgNF)based flexible and transparent EMI shielding film was successfully assembled via a room-temperature roll-to-roll production *** transparent application scenario,AgNF with 89%transmittance in visible range and 1μm thickness shows~20 dB shielding efficiency(EMI SE).On the other hand,total shielding(>50 dB)is obtained when the thickness of AgNF increases to 10μm,while its transmittance in visible range remains higher than 75%.Considering the facile and scale-free production technology,this material can be readily applied in large-scale,transparent,and/or SRSs EMI shielding.

关键词： transparent silver film

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肠道微生物群与外科重症感染

中华实验外科杂志 2024年第3期41卷 634-638页

作者：张海洋莱智勇王岩程檬霍晨达白中元蔡垚李想牛志强徐钧山西医科大学第一临床医学院太原030001 山西医科大学第一医院肝胆胰外科及肝脏移植中心太原030001 山西医科大学医学影像学院太原030001

感染是导致外科重症监护病房中危重患者死亡的主要病因之一。越来越多的证据表明,外科重症患者的感染多来源于肠道中机会致病菌易位。肠道菌群作为人体共生的部分,其代谢产物被人体摄取利用后会影响患者机体的生理病理代谢改变。危重症... 详细信息

感染是导致外科重症监护病房中危重患者死亡的主要病因之一。越来越多的证据表明,外科重症患者的感染多来源于肠道中机会致病菌易位。肠道菌群作为人体共生的部分,其代谢产物被人体摄取利用后会影响患者机体的生理病理代谢改变。危重症患者在入住外科重症监护病房期间往往由于外科手术、原发疾病、继发感染以及临床治疗措施的使用,很大程度上引起肠道微生态失调。本文以外科重症患者为焦点,深入回顾外科重症监护病房中患者临床治疗期间肠道微生态的变化特点与肠道微生物影响外科重症感染性疾病发生发展及其预后转归关系的相关研究,作一综述。

关键词：感染外科手术危重病胃肠道微生物组

Correlation of the temporal and spatial expression patterns of HQT with the biosynthesis and accumulation of chlorogenic acid in Lonicera japonica flowers

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Horticulture Research 2019年第1期6卷 934-947页

作者： Yanqun Li Dexin Kong Mei bai Hanjun He haiyang Wang Hong Wu State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources South China Agricultural UniversityGuangzhou 510642China Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine South China Agricultural UniversityGuangzhou 510642China Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm South China Agricultural UniversityGuangzhou 510642China

Hydroxycinnamoyl-CoA quinate transferase(HQT)is one of the key enzymes in the biosynthesis of chlorogenic acid(CGA)in the flowers of Lonicera ***,the spatiotemporal expression patterns of HQT and its relationship to the dynamics of CGA biosynthesis,transport,and storage remain largely *** this study,we collected *** flower samples at different growth stages(S1–S6)and examined the spatiotemporal expression pattern of HQT and the dynamic accumulation patterns of CGA using a combination of molecular and cytological *** results suggest that the spatiotemporal expression pattern of HQT is directly correlated with dynamic changes in CGA accumulation and distribution in *** *** further show that CGA is synthesized primarily in the cytoplasm and *** synthesized in the cytoplasm first accumulates in specialized vesicles and is then transferred to large central vacuoles for storage by fusion of CGA-containing vesicles with ***,CGA synthesized in the chloroplasts appears to be transferred into the vacuoles for storage by direct membrane fusion between the tonoplast and the disrupted chloroplast ***,our results suggest that CGA is synthesized in chloroplasts and cytoplasm and finally transferred to the vacuole for long-term storage.

关键词： flowers transferred specialized

Bifunctional Activated Carbon Ultrathin Fibers:Combining the Removal of VOCs and PM in One Material

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Advanced Fiber Materials 2023年第6期5卷 1934-1948页

作者： haiyang Wang Di Zu Xinyu Jiang Yong Xu Zhiwen Cui Peng Du Zekun Cheng Ziwei Li Lei Li Chong Yang Xiaopeng bai Baopu Zhang Yiqian Zhou Kuangyu Wang Bohan Li Zhenghong Huang Lihao Zhao Bo Li Hui Wu State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084People’s Republic of China Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolShenzhen 518055People’s Republic of China Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua UniversityBeijing 100084People’s Republic of China Beijing Tongfang Envir-Clean Technology Co. LTDBeijing 100083People’s Republic of China

Volatile organic compounds(VOCs)and particulate matter(PM)are both frequently present in air as contaminants,posing serious health and environmental *** current filtration of VOCs utilizes entirely different materials compared with PM filtration,adding complexity to air cleaning ***,we design a pitch-based activated carbon ultrathin fibers(PACUFs)for bifunctional air *** PACUFs,with fiber diameter of∼1.2μm and specific surface area of 2341 m^(2) g^(−1),provide both high VOCs adsorption capacity(∼706 mg g^(−1))and excellent efficiency of∼97% PM_(0.3) filtration with low pressure *** contrast,traditional activated carbon fibers exhibit VOCs adsorption capacity of∼448 mg g^(−1) and PM_(0.3) removal efficiency of only∼36%at an equal area density of∼190 g m^(−2).Theoretical investigations reveal the filtration mechanism of the high-performance bifunctional fibrous PACUFs,considering full advantages of the high surface area,small pore size,and significant micropore volume.

关键词： Air pollutants Activated carbon fiber Melt-blown spinning Bifunctional purification

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电解液浓度对泥岩电化学改性效果的影响

煤炭学报 2020年第S1期45卷 211-218页

作者：柴肇云杨攀张海洋白金波太原理工大学原位改性采矿教育部重点实验室山西太原030024

为阐明电解液浓度变化对泥岩电化学改性效果的影响规律,自行研制了泥岩电化学改性的渗滤式试验装置,并进行了不同电解液浓度下泥岩的电化学改性试验。渗滤式试验装置由电源、电流表、电压表、导线、样品室和缓释腔等组成,通过向阴阳极... 详细信息

为阐明电解液浓度变化对泥岩电化学改性效果的影响规律,自行研制了泥岩电化学改性的渗滤式试验装置,并进行了不同电解液浓度下泥岩的电化学改性试验。渗滤式试验装置由电源、电流表、电压表、导线、样品室和缓释腔等组成,通过向阴阳极缓释腔内填充不同的缓释材料阻断或减弱水电解产生的极端pH环境对岩样和电极的腐蚀作用。结合岩样的巴西劈裂、吸水膨胀、电阻率和X-射线衍射测试结果,研究了电化学作用下泥岩抗拉强度、吸水性、胀缩性、电阻率以及矿物组成等物性的变化规律,并探讨了物性变化的相关性。结果表明:(1)电化学改性岩样以0.5 mol/L为拐点,抗拉强度随电解液浓度增加先降后增,测试结果的离散性增大;而吸水率、膨胀率、电阻率变化趋势相近,均随电解液浓度增加先增后降。(2)电化学作用后岩样矿物成分石英相对含量随电解液溶液增加单调递增,方解石单调递减,而白云母和绿泥石则变化不大。(3)电化学改性岩样抗拉强度、吸水性、膨胀性、电阻率以及矿物组成等物性间存在一定的联动性:抗拉强度随石英含量增加线性递增而随方解石含量增加线性递减,吸水率和膨胀率随抗拉强度增加线性递减,而电阻率与抗拉强度的关系难以用某种特定的函数关系定量表述。

关键词：岩石力学泥岩电化学物性变化改性效果

1.3 μm InAs/GaAs quantum dot lasers on silicon with GaInP upper cladding layers

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Photonics Research 2018年第4期6卷 321-325页

作者： JUN WANG haiyang HU HAWING YIN YIMING bai JIAN LI XIN WEI YUANYUAN LIU YONGQING HUANG XIAOMIN REN HUIYUN LIU State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing 100876 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China Laboratory of Nano Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China Engineering Research Center for Semiconductor Integrated Technology Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China Department of Electronic & Electrical Engineering University College London London WC1E 7JE UK

We report on the first electrically pumped continuous-wave(CW) In As/Ga As quantum dot(QD) laser grown on Si with a GaInP upper cladding layer. A QD laser structure with a Ga_(0.51)In_(0.49)P upper cladding layer and an Al_(0.53)Ga_(0.47)As lower cladding layer was directly grown on Si by metal–organic chemical vapor deposition. It demonstrates the postgrowth annealing effect on the QDs was relieved enough with the GaInP upper cladding layer grown at a low temperature of 550°C. Broad-stripe edge-emitting lasers with 2-mm cavity length and 15-μm stripe width were fabricated and characterized. Under CW operation, room-temperature lasing at ~1.3 μm has been achieved with a threshold density of 737 A∕cm^2 and a single-facet output power of 21.8 mW.

关键词：量子点激光通讯技术发展现状

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低雷诺数下层流分离的等离子体控制

航空学报 2016年第7期37卷 2112-2122页

作者：孟宣市杨泽人陈琦白鹏胡海洋西北工业大学航空学院西安710072 上海飞机设计研究院上海201210 中国航天空气动力技术研究院北京100074

为有效控制层流分离特性,消除或减弱低雷诺数时小迎角下的升力非线性现象,改善翼型升力特性,并通过翼型的上表面转捩带与油流显示测量对等离子体激励控制机理进行阐述,对厚度为16%椭圆翼型低雷诺数下的气动特性进行了风洞试验研究。在... 详细信息

为有效控制层流分离特性,消除或减弱低雷诺数时小迎角下的升力非线性现象,改善翼型升力特性,并通过翼型的上表面转捩带与油流显示测量对等离子体激励控制机理进行阐述,对厚度为16%椭圆翼型低雷诺数下的气动特性进行了风洞试验研究。在此基础上,在上表面前缘10%弦长处布置激励器,通过压力分布测量观察等离子体激励对层流分离的影响。试验结果表明:当翼型上表面仅发生层流分离时,等离子体激励和转捩带的作用类似,可以有效延迟或者消除后缘层流分离,从而增加升力;当翼型上表面出现层流分离气泡并发生再附现象时,等离子体可以有效减小或者消除层流分离泡的范围,从而减小升力;通过控制层流分离,占空循环等离子体激励可以实现对低雷诺数小迎角下的升力的线性控制。

关键词：低雷诺数层流分离气泡等离子体流动控制升力非线性

Study on BCH based Encoder and Decoder Approach for EM-MWD Communication System

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Study on BCH based Encoder and Decoder Approach for EM-MWD C...

A Note on an Economic Lot-sizing Problem with Perishable Inventory and Economies of Scale Costs:Approximation Solutions and Worst Case Analysis

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作者： Cheng Zhang Haobin Dong Jian Ge Huan Liu Bingjie bai Zhiwen Yuan Jun Zhu haiyang Zhang School of Automation China University of Geosciences Hubei key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Institute of Geophysics & Geomatics China University of Geosciences

In practical applications of electromagnetic measurement while drilling（EM-MWD）,the signal-to-noise ratio（SNR）of receiver cannot always meet the requirements of reliable communication conditions due to the earth-attenuation,interfering signal from well site,*** to solve these problems,this paper presents a BCH encoder and decoder technology based on BPSK for ***,the paper studies the relationship between BCH encoding error performance and decoding method,source length and other factors through simulation;then,we obtain an optimal length of BCH code for EM-MWD through analyzing the bit error performance of hard-decision decoding and soft-decision decoding with different lengths of BCH *** results show that the proposed algorithm can reduce the bit error rate at a lower SNR,achieving a reliable communication condition when the SNR of a received signal is *** is demonstrated the effectiveness of the proposed BCH encoder and decoder algorithm based on BPSK for EM-MWD.

关键词： EM-MWD system BPSK BCH Optimized coding techniques

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International Journal of Automation and computing 2010年第1期7卷 132-136页

作者： Qing-Guo bai Yu-Zhong Zhang Guang-Long Dong School of Operations Research and Management Sciences Qufu Normal University Rizhao 276826 PRC haiyang Municipal Public Security Bureau Haiyang 265100 PRC

This paper presents an economic lot-sizing problem with perishable inventory and general economies of scale cost functions. For the case with backlogging allowed, a mathematical model is formulated, and several properties of the optimal solutions are explored. With the help of these optimality properties, a polynomial time approximation algorithm is developed by a new method. The new method adopts a shift technique to obtain a feasible solution of subproblem and takes the optimal solution of the subproblem as an approximation solution of our problem. The worst case performance for the approximation algorithm is proven to be （4√2 ＋ 5）/7. Finally, an instance illustrates that the bound is tight.

关键词： Economic lot-sizing problem backlogging economies of scale function perishable approximation algorithm