Results 21 to 30 of about 5,949 (163)
Pid controller for humidity control by modular air conditioning unit [PDF]
, 2015 组合式空调机组是烟草工业的重要动力设备，用以实现温湿度控制。本论文以厦门烟草工业有限责任公司的组合式空调机组为对象，针对湿度控制问题，研究PID控制的非线性改进及其算法与实现。文中首先介绍了组合式空调机组及其控制现状，并阐述了PID控制器的原理、控制算法以及几种常用参数整定方法；在此基础上，提出PID控制器的非线性改进及其算法；在实际的生产过程中，采用阶跃信号激励，获得了模型辨识的现场数据，并运用MATLAB软件进行参数辨识，从而获得了组合式空调机组湿度控制的数学模型；最后通过该模型进行数值仿真 ...
陈必辉
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World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT Water security in tropical regions faces escalating pressures from climate change, land‐use shifts, and population growth. We conducted a bibliometric review of 1146 peer‐reviewed articles (1964–2023) on tropical water security. Latent Dirichlet Allocation identified 13 thematic topics and their evolution. Publications rose sharply after 2012,
Karling Fernanda Schuster +3 more
wiley +1 more source
Study of GHz Surface Acoustic Wave Humidty Sensor Using Nanostructured Materials [PDF]
, 2016 随着物联网应用的不断扩展，需要大量传感器节点组成无线传感网络以实现未来万物互联的目标。其中，湿度测量器件在智能家居、气象、工业控制等领域是最为广泛和基础的传感器节点。为了实现无线传感网络，现有的电阻、电容型传感器件需要独立的电源系统持续供电，而在电池容量有限的条件下，器件需要采用占空比方式工作，即在高功耗的传感工作状态之间加入待机模式，以减小传感器节点的总功耗。由于待机模式的存在，无法对整个环境状态进行实时、无缝的检测，且由于构成节点的传感元件一般属于相对高功耗的器件，电池寿命始终有限。声表面波 ...
刘源
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Study on the Delayed-opening of Vacuum Pump in the Vacuum Pre-cooling Process [PDF]
, 2011 ince VCE-15 vacuum pre-cooling machine can be influenced by the air conditions in the vacuum chamber,the opening-time of vacuum is delayed,resulting in the prolonging of cooling period.Based on the cooling load,the computational formula for delayed ...
core +1 more source
Veterinary Dermatology, Volume 37, Issue 1, Page 140-147, February 2026.Background: Normal hydration of the canine epidermis is imperative for cutaneous homeostasis. Xerosis may be encountered in canine atopic dermatitis and may be aggravated by topical antiseptics. Hypothesis and Objectives: To evaluate the hydrating properties and the safety of a spray (Sensiderm spray; MP Labo) when applied after shampooing healthy dogs
Adamantia Pseftogka +3 more
wiley +1 more source
, 2010 选取塔里木河下游3处地下水埋深>6m的监测井位作为研究点,结合典型生态监测断面的地下水位监测数据,分析不同地下水埋深处柽柳的叶绿素荧光特性和光系统的光合活性.结果表明:随着地下水埋深加大和干旱胁迫加剧,柽柳叶片的实际光化学效率、电子传输速率和光化学猝灭等参数普遍下降;非光化学猝灭和调节性能量耗散量子产量等参数显著升高,而最大光量子产量总体处于相对适宜状态.干旱胁迫下柽柳的PSII光合活性随地下水埋深增大而下降,捕获光能的过剩程度加剧,发生光抑制的几率增大,其自身良好的抗旱性和自我调节机制 ...
朱成刚 +3 more
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Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Identifying refugia from emerging threats is vital to ensure the persistence of rare and threatened species, but modeling habitat distribution for these species is challenging and the role of people in refuge management is rarely considered. Myrtle rust is an emerging infectious disease that represents a grave threat to the rare wetland tree ...
Sarah M. Herbert +7 more
wiley +1 more source
近25 a 银川市城市化进程中热力景观格局演变分析 [PDF]
, 2016 ： Based on the Landsat images and statistical data，in this paper the urbanization process and thermal landscape dynamics of Yinchuan City were analyzed． The objectives of this study were as follows: ① To analyze the spatial and dynamic characteristics of
吕荣芳, 张建明, 王浩, 王鹏龙
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Integrative Conservation, Volume 4, Issue 3, Page 430-441, September 2025.Our study identifies southern China, including mountainous regions and islands, as key areas rich in phylogenetic diversity, and phylogenetic endemism of lizards that are currently under‐protected. Current protected areas however do not adequately cover regions that are critical for preserving the evolutionary history of lizards.
Tao Liang (梁涛) +8 more
wiley +1 more source
Nitrogen speciation and stable nitrogen and oxygen isotopic compostions of maritime aerosol in spring over the continental shelf sea in eastern china and the Northwest Pacific Ocean [PDF]
, 2016 大气气溶胶是大气化学中多相反应的催化剂，其化学成份极其复杂。人类活动释放到大气中的不同形态的活性氮是大气气溶胶中一个重要的组成部分。在东亚冬季季风的驱使下，含有活性氮的气溶胶可以在大气中长距离传输并沉降到下风向区域的边缘海和开阔大洋。稳定氮同位素可用于追溯海洋源气溶胶中活性氮的主要来源及其在大气中的化学过程。但由于氮同位素在大气传输和化学转化过程中的分馏效应，使得其应用变得复杂。起源于西伯利亚的东亚冬季季风通过人为活性氮排放强烈的中国东北后又覆盖了整个中国东部陆架海和西北太平洋海域，而且在该海域的春季 ...
罗笠
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