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北方日光温室智能监控系统的设计与实现

中国农业科技导报 2016年第5期18卷 94-101页

作者：李亚迪苗腾朱超纪建伟沈阳农业大学信息与电气工程学院沈阳110866

建立日光温室智能监控系统,能够推动我国北方日光温室设施园艺现代化,对日光温室的智能监控有助于提高设施园艺的产量,实现对日光温室的现代化管理。针对中国北方日光温室设施农业环境数据的监测与环境控制需要,设计了一套以ST公司的ST... 详细信息

建立日光温室智能监控系统,能够推动我国北方日光温室设施园艺现代化,对日光温室的智能监控有助于提高设施园艺的产量,实现对日光温室的现代化管理。针对中国北方日光温室设施农业环境数据的监测与环境控制需要,设计了一套以ST公司的STM32单片机为控制核心并符合北方日光温室环境的智能监控系统,该系统综合运用传感器技术,自动检测技术和通讯技术等实现对日光温室温度、湿度、光照度、CO2浓度的采集、存储、显示、监测和控制,并对采集到的温室环境因子数据进行了线性回归分析。完成了对环境温室的实时遥测,遥调和遥控,同时能提供各温室环境因子的历史记录和数据。运行结果表明:该智能监控系统运行稳定,测量结果准确可靠,扩展性强,可以满足控制要求,具有良好的应用前景。

关键词：数据采集 STM32 环境因子智能控制

A columnar multi-layer sliding triboelectric nanogenerator for water wave energy harvesting independent of wave height and direction

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Nano Research 2024年第4期17卷 3029-3034页

作者： Xue miao Hanxiao Yang Zekun Li Meifei Cheng Yilin Zhao Lingyu Wan Aifang Yu Junyi Zhai Center on NanoEnergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Beijing Institute of Nano Energy and Nano Systems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of ScienceBeijing 101408China

The ocean,with its highly variable and complex meteorological conditions,harbors enormous renewable *** nanogenerators(tengs),which possess unique advantages,show exciting prospects in water wave energy *** to design and optimize tengs to cover all characteristic water wave energies and achieve efficient energy utilization is *** this paper,we carefully designed and fabricated a columnar multi-layer sliding teng(CMLS-teng)that can harvest water wave energy independent of wave height and *** rods with a hollow acrylic spherical shell were introduced to deliver wave energy,ensuring that the CMLS-teng can work in all directions from 0°to 360°.Based on the sliding structure,switching the optimized CMLS-teng is independent of wave *** optimized CMLS-teng can achieve a total power density of 730 mW/m^(3) at a wave height of only 4.8 cm regardless of wave direction,which can illuminate multiple light-emitting diodes(LEDs)to provide lighting and provide power to a watch and a hygrometer for temperature and humidity *** work provides new choices and hopes for the effective collection of full-range water wave energy.

关键词： triboelectric nanogenerator wave energy multi-direction columnar slide

Mixed D-vine copula-based conditional quantile model for stochastic monthly streamflow simulation

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Water Science and Engineering 2024年第1期17卷 13-20页

作者： Wen-zhuo Wang Zeng-chuan Dong Tian-yan Zhang Li Ren Lian-qing Xue teng Wu College of Water Resources and Hydrology Hohai UniversityNanjing 210098China Yellow River Research Center Hohai UniversityNanjing 210098China

Copula functions have been widely used in stochastic simulation and prediction of ***,existing models are usually limited to single two-dimensional or three-dimensional copulas with the same bivariate block for all *** address this limitation,this study developed a mixed D-vine copula-based conditional quantile model that can capture temporal *** model can generate streamflow by selecting different historical streamflow variables as the conditions for different months and by exploiting the conditional quantile functions of streamflows in different months with mixed D-vine *** up-to-down sequential method,which couples the maximum weight approach with the Akaike information criteria and the maximum likelihood approach,was used to determine the structures of multivariate Dvine *** developed model was used in a case study to synthesize the monthly streamflow at the Tangnaihai hydrological station,the inflow control station of the Longyangxia Reservoir in the Yellow River *** results showed that the developed model outperformed the commonly used bivariate copula model in terms of the performance in simulating the seasonality and interannual variability of *** model provides useful information for water-related natural hazard risk assessment and integrated water resources management and utilization.

关键词： Stochastic monthly streamflow simulation Mixed D-vine copula Conditional quantile model Up-to-down sequential method Tangnaihai hydrological station

X-ray excited Mn^(2+)-doped persistent luminescence materials with biological window emission for in vivo bioimaging

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Journal of Rare Earths 2024年第1期42卷 28-35,I0001页

作者： Hanrun Zheng Lin Liu Yi’ang Li Rui Rong Liang Song Junpeng Shi Jing teng Xia Sun Yun Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China University of the Chinese Academy of Sciences Beijing100049China Xiamen Hospital of Traditional Chinese Medicine Xiamen361015China Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China

In recent years,persistent luminescence materials(PLMs)excited by X-rays and emitting in biological windows have received extensive attention in the field of high-sensitivity *** metal Mn^(2+)is an ideal emission center,but few studies focus on Mn^(2+)-doped PLMs with X-ray excitation and biological window ***,we report a Mn^(2+)-doped PLM,LiYGeO_(4):Mn^(2+)(LYGM),with excellent biological window persistent luminescence *** excitation by UV,LYGM produces a durable biological window of persistent luminescence emission at 660 nm for up to 20 *** *** can be repeatedly excited by X-rays,resulting in long-term biological window persistent luminescence *** addition,we obtain LYGM around 200 nm in diameter by ball milling and centrifugation and improve its biocompatibility by surface modification to apply it to in vivo imaging in *** LYGM are injected into mice through the tail vein,in situ excitation of X-rays can be *** the persistent luminescence decays,LYGM can be re-excited for repeated ***,LYGM shows potential prospects for in vivo deep tissue and long-term bioimaging.

关键词： Persistent luminescence X-ray Biological window In vivo imaging Rare earths

A Stroke-Limitation AMD Control System with Variable Gain and Limited Area for High-Rise Buildings

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工程与科学中的计算机建模(英文) 2024年第1期138卷 865-884页

作者： Zuo-Hua Li Qing-Gui Wu Jun teng Chao-Jun Chen School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen518055China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong Kong100872China

Collisions between a moving mass and an anti-collision device increase structural responses and threaten structural *** active mass damper(AMD)with stroke limitations is often used to avoid ***,a strokelimited AMD control system with a fixed limited area shortens the available AMD stroke and leads to significant control *** solve this problem,the design approach with variable gain and limited area(VGLA)is proposed in this ***,the boundary of variable-limited areas is calculated based on the real-time status of the moving *** variable gain(VG)expression at the variable limited area is deduced by considering the saturation of AMD ***,numerical simulations of a stroke-limited AMD control system with VGLA are conducted on a high-rise building *** numerical simulations show that the proposed approach has superior strokelimitation performance compared with a stroke-limited AMD control system with a fixed limited ***,the proposed approach is validated through experiments on a four-story steel frame.

关键词： High-rise buildings active control stroke limitations variable gain variable limited area

Tuning the electronic conductance of REH_(x)(RE=Nd,Ce,Pr)by structural deformation

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Journal of Energy Chemistry 2024年第8期95卷 440-445,I0010页

作者： Shangshang Wang Weijin Zhang Jirong Cui Shukun Liu Hong Wen Jianping Guo teng He Hujun Cao Ping Chen Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Catalysis Chinese Academy of SciencesDalian 116023LiaoningChina

Hydride ion(H-)conductors have drawn much attention due to their potential applications in hydrideion-based *** earth metal hydrides(REH_(x))have fast H-conduction which,unfortunately,is accompanied by detrimental electron conduction preventing their application as ion ***,REH_(x)(RE=Nd,Ce,and Pr)with varied grain sizes,rich grain boundaries,and defects have been prepared by ball milling and subsequent *** electronic conductivity of the ball-milled REH_(x)samples can be reduced by 2-4 orders of magnitude compared with the non-ball-milled *** relationship of electron conduction and miscrostructures in REH_(x)is studied and discussed based on experimental data and previously-proposed classical and quantum *** H-conductivity of all REH_(x)is about 10^(-4)to 10^(-3)S cm^(-1)at room temperature,showing promise for the development of H-conductors and their applications in clean energy storage and conversion.

关键词： Hydride ion conduction Electron conduction Nanosized grain Crystal defect Electron scattering

Durable K-ion batteries with 100% capacity retention up to 40,000 cycles

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Carbon Energy 2024年第5期6卷 201-212页

作者： Xianlu Lu Zhao Liang Zhi Fang Dongdong Zhang Yapeng Zheng Qiao Liu Dingfa Fu Jie teng Weiyou Yang Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingboZhejiangChina College of Materials Science and Engineering Hunan UniversityChangshaChina College of Mechanical and Vehicle Engineering Hunan UniversityChangshaChina

Currently,the major challenge in terms of research on K-ion batteries is to ensure that they possess satisfactory cycle stability and specific capacity,especially in terms of the intrinsically sluggish kinetics induced by the large radius of K+***,we explore high-performance K-ion half/full batteries with high rate capability,high specific capacity,and extremely durable cycle stability based on carbon nanosheets with tailored N dopants,which can alleviate the change of volume,increase electronic conductivity,and enhance the K+ion *** as-assembled K-ion half-batteries show an excellent rate capability of 468 mA h g^(−1) at 100 mA g^(−1),which is superior to those of most carbon materials reported to ***,the as-assembled half-cells have an outstanding life span,running 40,000 cycles over 8 months with a specific capacity retention of 100%at a high current density of 2000 mA g^(−1),and the target full cells deliver a high reversible specific capacity of 146 mA h g^(−1) after 2000 cycles over 2 months,with a specific capacity retention of 113%at a high current density of 500 mA g^(−1),both of which are state of the art in the field of K-ion *** study might provide some insights into and potential avenues for exploration of advanced K-ion batteries with durable stability for practical applications.

关键词： carbon nanosheet cycle stability K-ion batteries rate performance specific capacity

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病虫害状态下作物叶片表观模拟方法

农业工程学报 2014年第2期30卷 169-175页

作者：苗腾赵春江郭新宇陆声链温维亮北京农业信息技术研究中心北京100097 农业部农业信息技术重点开放实验室北京100097 沈阳农业大学信息与电气工程学院沈阳110866

为了解决农作物病害三维场景难以模拟的问题,该文提出一种病虫害条件下叶片表观的模拟算法。该方法首先利用细胞纹理基函数控制病斑的形状、分布及扩散方式;之后为了模拟病斑在叶片上的堆积效果,采用shell模型进行模拟,并针对病斑的特点... 详细信息

为了解决农作物病害三维场景难以模拟的问题,该文提出一种病虫害条件下叶片表观的模拟算法。该方法首先利用细胞纹理基函数控制病斑的形状、分布及扩散方式;之后为了模拟病斑在叶片上的堆积效果,采用shell模型进行模拟,并针对病斑的特点,对病斑的颗粒感、高度变化以及周边叶色的变化情况均进行建模。试验结果表明,该方法可以真实地模拟植物叶片在病害状态下的表观,可以容易地与病害知识进行结合,实现基于环境数据驱动的白粉病病情变化过程模拟,为数字农业设计及农业科普培训动画的制作提供有力工具。

关键词：病害作物模型虫害控制数字植物

基于低场核磁共振技术分析离子液体对水稻萌发及幼苗生长的影响

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沈阳农业大学学报 2020年第5期51卷 626-630页

作者：徐静宋平苗腾金莉罗海艳沈阳农业大学信息与电气工程学院沈阳110161

为研究离子液体处理下水稻种子萌发过程中内部水分的流动规律及分布情况,揭示离子液体的使用对环境安全的影响,利用低场核磁共振技术,对不同质量浓度离子液体处理的水稻种子在萌发过程中进行检测。以水稻种子为研究对象,采用质量浓度为0... 详细信息

为研究离子液体处理下水稻种子萌发过程中内部水分的流动规律及分布情况,揭示离子液体的使用对环境安全的影响,利用低场核磁共振技术,对不同质量浓度离子液体处理的水稻种子在萌发过程中进行检测。以水稻种子为研究对象,采用质量浓度为0,4,6,8,10,12,14,16mg·L^-1的溴化盐([HMIM]Br)进行浸种,在侵种的第48h处于恒温萌发环境中的水稻种子,采集低场核磁共振横向弛豫时间信号数据,并通过反演运算获得横向弛豫时间T2反演波谱。结果表明:通过低场核磁共振横向弛豫时间T2,将水稻种子内部水分划分为结合水(0.1

关键词：核磁共振种子水分离子液 T2反演波谱