摘要：With the rapid development of portable devices and internet of things,the requirement of system wearability and integration accelerates the investigation of flexible multifunctional *** this study,we developed an integrated flexible sensing system with four nanowire-based sensors and a Ni microwire-based temperature *** four nanowirebased sensors are three kinds of photodetectors responding to lights with different wavelengths and a gas *** to the large surface volume ratio and considerable sub wavelength effect,all the nanowire-based sensors show good sensing response and excellent linear relationship between sensitivity and *** as-fabricated flexible sensing system can simultaneously detect environmental parameters,including temperature change,light intensities from UV-Visible to near infrared regions,and harmful gas *** flexible multifunctional sensing system therefore opens up a new way for the emerging portable and wearable electronics.

摘要：A simple self-catalyzed chemical vapor deposition process was conducted to synthesize single-crystalline GaSb nanowires,where Ga droplets were utilized as the *** as-grown GaSb nanowires exhibited typical p-type semiconductor behavior with the calculated hole mobility of about 0.042 cm^2 V^-1 s^-*** photoresponse properties of the GaSb nanowires were studied by fabricating nanowire photodetectors on both rigid and flexible *** results revealed that the photodetectors exhibited broad spectral response ranging from ultraviolet,visible,to near-infrared *** the device on rigid substrate,the corresponding responsivity and the detectivity were calculated to be 3.86×10^3 A W-1 and 3.15×10^13 Jones for 500 nm light,and 7.22×10^2 A W-1 and 5.90×10^12 Jones for 808 nm light,respectively,which were the highest value compared with those of other reported Ga1-xInxAsySb1-y structure ***,the flexible photodetectors not only maintained the comparable good photoresponse properties as the rigid one,but also possessed excellent mechanical flexibility and *** study could facilitate the understanding on the fundamental characteristics of self-catalyzed grown GaSb nanowires and the design of functional nano-optoelectronic devices based on GaSb nanowires.

摘要：Hybrid sodium-ion capacitors(SICs)bridge the gap between the supercapacitors(SCs)and batteries and have huge potential applications in large-scale energy ***,designing appropriate anode materials with fast kinetics behavior as well as long cycle life to match with the cathode electrodes remains a crucial ***,Nb2O5 nanotubes and nanowire-to-nanotube homo-junctions were directly grown on the carbon cloth(CC)via a simple hydrothermal process through regulating the pH value of *** as-prepared Nb2O5@CC nanotubes displayed a high reversible capacity of 175 mA hg-1 at the current density of 1Ag-1 with the coulombic efficiency of 97%after 1500 ***,the SICs fabricated with Nb2O5@CC and activated carbon(AC)electrode materials showed a high energy density of 195 W h kg-1 at 120 W kg-1,a power density of 7328 W kg-1 at 28 W hkg-1and 80%of the capacitance retention after 5000 ***,the flexible SIC devices can operate normally at various bendable *** Nb2O5@CC nanotubes in this work can be promising electrode materials in flexible and wearable energy storage devices.

摘要：Flexible photodetectors have become a focus of current researches because they may offer some unique applications in various new areas that require flexible, lightweight, and mechanical shock-resistive sensing elements. In this work, we designed flexible organic-inorganic hybrid photodetectors on various flexible substrates, including polyethylene terephthalate （PET）, common Sellotape and polydimethylsiloxane （PDMS）, with n-type phenyl-C61-butyric acid methyl ester （PCBM） and p-type pearl-like GaP nanowires （NWs） as the active materials. The as-fabricated hybrid devices exhibited an optimized performance superior to the device made of pristine GaP NWs, with a fast response time （43 ms） and high on/off ratio （-170）. Under different bending conditions, the flexible hybrid photodetectors demonstrated excellent flexibility and electrical stability, which make them very promising for further large-scale, high sensitivity and high speed photodetector applications.

摘要：自然保护区是保护生物多样性最有效的方式之一,但是近年来自然保护区的保护成效正受到越来越多的质疑,已成为保护生物学研究中急需考虑的问题,也是目前我国自然保护区建设过程中面临的重要挑战。本研究以湖北神农架国家级自然保护区为研究对象,基于该保护区1980年、1990年、2010年、2015年的土地利用数据,结合DEM数据和川金丝猴(Rhinopithecus roxellana hubeiensis)分布及行为特征数据,应用层次分析法(AHP法)和集合种群容量(metapopulation capacity),分析了神农架保护区自建立以来(1980–2015)森林的面积变化、驱动因素以及川金丝猴栖息地面积和破碎化动态格局,论证了神农架保护区对森林和川金丝猴栖息地的保护成效。结果表明,神农架保护区自建立以来,保护区内森林面积增加了34.27%,森林覆盖度由47.94%上升到64.36%,增加了16.42%,其中82.77%的新增森林为灌木林和疏林转变而来;川金丝猴最适宜栖息地面积增加了17.70%,集合种群容量增加了515.17%,最适宜栖息地的破碎化程度显著降低。天然林保护工程(the Natural Forest Conservation Program,NFCP)和退耕还林工程(the Sloping Land Conversion Program,SLCP)实施后,保护区内森林面积增加了23.24%,森林覆盖度增加了12.77%,川金丝猴最适宜栖息地面积增加了14.29%,集合种群容量增加了367.20%。本研究结果表明,神农架保护区在森林和旗舰种栖息地保护方面,均取得了很好的保护成效。

摘要：二维过渡金属碳/氮化物(MXenes)自2011年被首次报道以来,凭借其特殊的二维层状结构、优异的导电性和电化学性能在能源、催化、传感、电磁屏蔽和微波吸收等领域吸引了极大关注。近几年,随着对该材料认识的不断加深,其在光电领域的研究也不断深入。与其它领域不同,光电器件聚焦于延伸MXenes材料半导体性质,通过设计表面官能团、精准控制层数等来打开材料带隙,从而使其从金属性质转变为半导体性质。本文主要围绕MXenes材料的光电性质,介绍其在柔性光电子器件中的应用,系统阐述MXenes材料在透明电子器件、光电探测器、图像传感器、光电晶体管、人工神经视觉网络系统的应用前沿现状与趋势,并展望了MXenes基柔性光电器件面临的挑战以及未来发展前景。

摘要：在程序设计教学过程中,如何解决程序设计本身枯燥、难懂这个难题,一直是广大计算机教师颇感兴趣的课题。结合教学体会,从培养学生兴趣、基础知识的学习、对算法的理解、知识的灵活运用及编程能力的提高等几方面对提高学生VB程序设计能力的方法作了阐述。

摘要：旅游公路会带来野生动物致死、生境破碎化、栖息地丧失、基因隔离等一系列生态问题。设计和修建跨公路的野生动物通道作为缓解旅游公路负面效应的一种有效途径。野生动物通道在国外研究较多,但在我国实际案例较少。作者针对湖北神农架世界自然遗产国家一级保护动物川金丝猴(Rhinopithecus roxellana)被旅游公路隔离的生态问题,通过实地考察和分析该物种的长期监测结果,构建了跨公路动物通道的设计方案。神农架川金丝猴通道主要技术参数为:(1)在遗产地的大龙潭和小龙潭各建川金丝猴上跨式通道1座,宽度以80 m为宜;(2)通道上铺设土壤,厚度2.2 m—2.4 m;(3)通道上种植巴山冷杉(Abies fargesii)、长松萝(Usnea longissimi)、红桦(Betula albosinensis)、千金榆(Carpinus cordata)、猫儿屎(Decaisnea insignis)、米心水青冈(Fagus engleriana)等川金丝猴喜食的植物,培育形成郁闭度0.7—0.8的针阔混交林;(4)在通道入口和中部设立红外监测系统,并对监测数据进行自动实时传输与分析;(5)完善配套设施建设,如在通道入口两侧设立高2.4 m的栅栏、通道两侧设立有藤蔓植物覆盖的生态保护墙、树立"注意野生动物"、"前方有野生动物通道"警示牌等。通道建成后,须加强通道维护管理、持续开展科研监测、积极宣传保护理念,以期实现川金丝猴通道功能高效持久的发挥。

摘要：旅游环境容量是景区调控游客规模,实现景区经济、社会、生态效益的协调和可持续发展必不可少的依据。以生物多样性热点区神农架世界自然遗产地为研究对象,通过实地调查法,运用旅游环境容量静态模型分析了神农架世界自然遗产地的生态环境容量、旅游空间容量、旅游设施容量、旅游管理容量和旅游心理容量5个分量指标。研究结果表明:(1)自然遗产地的旅游空间容量、旅游设施容量、旅游管理容量和旅游心理容量的最佳值分别为1.74万人·d^(-1)、1.42万人·d^(-1)、2.15万人·d^(-1)、1.16万人·d^(-1);(2)由于神农架水质和空气质量优良,所有的生活污水都必须经处理达标后才能排放,景区内垃圾日产日清,并运输至景区外进行统一处理,所以生态环境容量暂不是旅游环境容量的限制因子;(3)根据"木桶原理",选择最小分量作为最佳旅游环境容量,得到日旅游环境容量的最佳值为1.16万人,年旅游环境容量最佳值为208.37万人。以上结果可为遗产地游客人数及分流、接待设施存量、旅游产品设计及开发的控制和管理提供依据。

摘要：伴随日益要求严苛的环保要求,企业在加工零件时需要用到大量的绿色制造技术。低温微量润滑加工技术作为一种新型的切削技术,符合绿色制造的要求并大量应用于生产过程中。介绍一种低温微量润滑冷却的气动-液压系统,主要利用微量润滑技术和涡流制冷技术,从气动-液压系统及电气三方面对样机进行设计并完成相关实验。所得实验成果对微量润滑装置的再升级具有一定的参考意义。