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Effects of Land Cover on Soil Temperature,Humidity and Moisture in Phoebe bournei Forest 被引量:9
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作者 吴际友 陈明皋 +5 位作者 董春英 黄小飞 黄明军 程勇 刘球 吴其军 《Agricultural Science & Technology》 CAS 2015年第12期2725-2729,共5页
Under the condition of high temperature, the effects of five cover patterns (clean tillage, film mulching, weed covering, branches and leaves covering and growing grass covering) on soil properties in young Phoebe b... Under the condition of high temperature, the effects of five cover patterns (clean tillage, film mulching, weed covering, branches and leaves covering and growing grass covering) on soil properties in young Phoebe boumei forest were in- vestigated. The results showed that the five cover patterns all showed significant ef- fects on soil properties in young Phoebe bournei forest under the condition of high temperature. Land cover increased land temperature in Phoebe boumei forest. Un- der the film mulching, the land temperature was increased most rapidly with the largest increment. However, weed covering, branches and leaves covering and growing grass covering decreased land temperature. Among them, growing grass covering showed the best cooling effect. The film mulching, weed covering, branch- es and leaves covering and growing grass covering all increased land humidity. The film mulching showed the best moisture-preserving effect in the early period, but in the late period, the humidity in the film mulching treatment group was lower than that in the clean tillage treatment group. Among the five mulching patterns, moisture loss in the film mulching treatment group was slowest and least, followed by those in the weed covering and branches and leaves covering treatment groups, and moisture loss in the growing grass covering treatment group was fastest and most. 展开更多
关键词 soil management Land cover Land temperature Land humidity soil moisture
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Wireless sensing system for environmental humidity and temperature monitoring
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作者 袁耀东 张爱军 《Journal of Measurement Science and Instrumentation》 CAS 2013年第3期267-271,共5页
Aiming at the actual demand for monitoring environmental information,a wireless sensing system for temperature and relative humidity(RH)monitoring based on radio frequency(RF)technology and mobile network was designed... Aiming at the actual demand for monitoring environmental information,a wireless sensing system for temperature and relative humidity(RH)monitoring based on radio frequency(RF)technology and mobile network was designed.This paper introduces the architecture of the system.The system uses AVR micro controller unit(MCU),KYL-1020U RF module and SHT71 to complete real-time temperature and humidity monitoring,and uses SIM900A module to realize remote alarming and monitoring with short message system(SMS)through global system for mobile communication(GSM).Experimental results show that the designed system has good stability of measurement and real-time performance,and it can be used in some small temperature and humidity monitoring occasions. 展开更多
关键词 environmental monitoring temperature and humidity radio frequency (RF) technology wireless transmission global system for mobile communication (GSM)CLC number:TP274 Document code:AArticle ID:1674-8042(2013)03-0267-05
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Application of Intelligent Blood Temperature and Humidity Monitoring System in Blood Station
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作者 Shengwang Chen Zhenquan Ning +1 位作者 Wenlong Lin Shanchang Chen 《Natural Science》 2022年第5期186-192,共7页
Objective: To explore the application of intelligent blood temperature and humidity monitoring system in cold chain management of blood station. Methods: Through the monitoring of fifty sets of cold-chain equipment in... Objective: To explore the application of intelligent blood temperature and humidity monitoring system in cold chain management of blood station. Methods: Through the monitoring of fifty sets of cold-chain equipment in the central blood station in Hezhou for 6 months, the differences between the management of the automatic temperature and humidity monitoring system and the manual management were compared in terms of real-time recording, equipment alarm, data storage, historical data traceability and data analysis. Results: Temperature and humidity automatic monitoring system can automatically real-time acquisition, transmission, storage and alarm according to the required time interval;meanwhile, historical data can be quickly exported and traced, data and charts can be analyzed, and the alarm is real-time and effective. Conclusion: The system can effectively monitor the process of blood cold chain in blood stations and play a key role in ensuring blood quality. It can be popularized and used in blood stations. 展开更多
关键词 BLOOD temperature and humidity Automatic monitoring system
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Simplification and Experimental Verification for Temperature and Humidity Field Coupling Model of Conservatory Soil 被引量:1
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作者 曹滨斌 李惟毅 李兆力 《Transactions of Tianjin University》 EI CAS 2011年第1期33-38,共6页
Based on the surface energy balance model which is widely used abroad, a temperature and humidity field coupling model of conservatory soil without crop vegetation in full illumination was established. Considering the... Based on the surface energy balance model which is widely used abroad, a temperature and humidity field coupling model of conservatory soil without crop vegetation in full illumination was established. Considering the relatively closed environment in conservatory, weak solar radiation and little surface evaporation of soil, the daily variation of water content in different soil layers may be neglected, then the temperature and humidity field coupling model was simplified to a one-dimensional thermal diffusion model. The simplified model and the temperature and humidity field coupling model adopted the same computational method of soil physical parameters and discrete format of heat diffusion differential equations, and were applied to the continuous simulation of temperature field in conservatory soil without crop vegetation in full illumination. Through the comparison between simulation results and experimental data, the precision of the simplified model was verified. The typical rule of soil heat flux variation in a 24 h cycle was also obtained. 展开更多
关键词 conservatory soil temperature humidity coupling model SIMPLIFICATION
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Thermal integrity profiling of cast-in-situ piles in sand using fiber-optic distributed temperature sensing 被引量:1
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作者 Jing Wang Honghu Zhu +4 位作者 Daoyuan Tan Zili Li Jie Li Chao Wei Bin Shi 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2023年第12期3244-3255,共12页
Defects in cast-in-situ piles have an adverse impact on load transfer at the pile‒soil interface and pile bearing capacity. In recent years, thermal integrity profiling (TIP) has been developed to measure temperature ... Defects in cast-in-situ piles have an adverse impact on load transfer at the pile‒soil interface and pile bearing capacity. In recent years, thermal integrity profiling (TIP) has been developed to measure temperature profiles of cast-in-situ piles, enabling the detection of structural defects or anomalies at the early stage of construction. However, using this integrity testing method to evaluate potential defects in cast-in-situ piles requires a comprehensive understanding of the mechanism of hydration heat transfer from piles to surrounding soils. In this study, small-scale model tests were conducted in laboratory to investigate the performance of TIP in detecting pile integrity. Fiber-optic distributed temperature sensing (DTS) technology was used to monitor detailed temperature variations along model piles in sand. Additionally, sensors were installed in sand to measure water content and matric suction. An interpretation method against available DTS-based thermal profiles was proposed to reveal the potential defective regions. It shows that the temperature difference between normal and defective piles is more obvious in wet sand. In addition, there is a critical zone of water migration in sand due to the water absorption behavior of cement and temperature transfer-induced water migration in the early-age concrete setting. These findings could provide important insight into the improvement of the TIP testing method for field applications. 展开更多
关键词 Geotechnical monitoring Distributed temperature sensing(DTS) Pile defect Fiber-optic thermal integrity profiling(FO-TIP) Heat transfer Pile‒soil interface
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An improved temperature vegetation dryness index(iTVDI) and its applicability to drought monitoring 被引量:3
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作者 YANG Ruo-wen WANG Hai +2 位作者 HU Jin-ming CAO Jie YANG Yu 《Journal of Mountain Science》 SCIE CSCD 2017年第11期2284-2294,共11页
Using Moderate Resolution Imaging Spectroradiometer(MODIS) data from the dry season during 2010–2012 over the whole Yunnan Province, an improved temperature vegetation dryness index(iTVDI), in which a parabolic dry-e... Using Moderate Resolution Imaging Spectroradiometer(MODIS) data from the dry season during 2010–2012 over the whole Yunnan Province, an improved temperature vegetation dryness index(iTVDI), in which a parabolic dry-edge equation replaces the traditional linear dry-edge equation, was developed, to reveal the regional drought regime in the dry season. After calculating the correlation coefficient, root-mean-square error, and standard deviation between the iTVDI and observed topsoil moisture at 10 and 20 cm for seven sites, the effectiveness of the new index in depicting topsoil moisture conditions was verified. The drought area indicated by iTVDI mapping was then compared with the drought-affected area reported by the local government. The results indicated that the iTVDI can monitor drought more accurately than the traditional TVDI during the dry season in Yunnan Province. Using iTVDI facilitates drought warning and irrigation scheduling, and the expectation is that this new index can be broadly applied in other areas. 展开更多
关键词 IMPROVED temperature vegetationdryness INDEX (iTVDI) Drought monitoring Lineardry-edge EQUATION Parabolic dry-edge EQUATION soilmoisture
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Soil Respiration Characteristics and Its Relationship with Environmental Factors of Different Vegetation Types during Growing Season in Dongting Lake 被引量:1
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作者 Yan YANG Jie TANG +3 位作者 Yongjin LI Yuxi TANG Changzhu LI Lijuan JIANG 《Agricultural Biotechnology》 CAS 2019年第1期126-129,179,共5页
In order to ascertain the soil carbon flux characteristics of poplar plantations and crop communities in the Dongting Lake area during the growing season and their correlation with hydrothermal conditions,soil respira... In order to ascertain the soil carbon flux characteristics of poplar plantations and crop communities in the Dongting Lake area during the growing season and their correlation with hydrothermal conditions,soil respiration rate was monitored at fixed sites and time points with an LI-8100 A automated soil flux system.Meanwhile,the surface temperature and soil temperature and humidity were measured. The soil respiration variation in the two different vegetation types and its correlation with environmental factors were analyzed. The results showed that in the growing season,the diurnal variation curves of soil respiration rate in the two different vegetation types showed a single peak variation,but there was certain difference in the appearance time of the peak. The peak of the crop appeared around11: 00 am,while the peak of soil respiration in the poplar appeared around 13: 00. The soil respiration rate of the poplar was also significantly higher than that of the crop,and the average difference of soil respiration rate between the two was 3. 09 and 3. 55 μmol/( m^2·s) in April and August,respectively. Temperature and soil moisture were the main factors affecting soil respiration of the poplar plantation and crop community. Temperature had a greater effect on the soil respiration of the crop community,and soil humidity had a greater impact on soil respiration in the poplar plantation,showing a correlation coefficient reaching 0. 952. 展开更多
关键词 Dongting LAKE GROWING SEASON soil RESPIRATION rate temperature humidity Correlation
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基于温度植被干旱指数(TVDI)的甘肃省农业干旱监测方法研究
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作者 沙莎 王丽娟 +2 位作者 王小平 胡蝶 张良 《干旱气象》 2024年第1期27-38,共12页
改进温度植被干旱指数(Temperature Vegetation Dryness Index,TVDI)并明确TVDI的农业干旱等级阈值,对提高TVDI指数监测农业干旱能力有重要意义。利用近19 a的MODIS(Moderate Resolu⁃tion Imaging Spectro-radiometer,MODIS)遥感数据,... 改进温度植被干旱指数(Temperature Vegetation Dryness Index,TVDI)并明确TVDI的农业干旱等级阈值,对提高TVDI指数监测农业干旱能力有重要意义。利用近19 a的MODIS(Moderate Resolu⁃tion Imaging Spectro-radiometer,MODIS)遥感数据,基于单时次和多时次方法构建NDVI(Normalized Difference Vegetation Index,NDVI)-LST(Land Surface Temperature,LST)、EVI(Enhanced Vegetation In⁃dex,EVI)-LST、RVI(Ratio Vegetation Index,RVI)-LST、SAVI(Soil-Adjusted Vegetation Index,SAVI)-LST等几种特征空间,讨论TVDI计算方法,分析TVDI在甘肃省农业干旱监测中的适用性,并明确甘肃省夏季TVDI农业干旱分级标准。结果表明:(1)基于多时次方法构建的SAVI-LST特征空间TVDI更适合甘肃省农业干旱监测,其对土壤相对湿度(Relative Soil Moisture,RSM)拟合的均方根误差(Root Mean Squared Error,RMSE)和平均绝对误差(Mean Absolute Error,MAE)比NDVI-LST特征空间TVDI对RSM拟合的RMSE和MAE下降1%~5%;(2)TVDI适用于夏季甘肃省半干旱区、半湿润区、湿润区等非干旱区浅层10、20 cm土壤深度的农业干旱监测,RMSE和MAE约15.6%和12.6%,拟合误差湿润区<半湿润区<半干旱区;(3)利用TVDI与RSM线性关系确定的TVDI农业干旱等级更有利于提高TVDI监测农业干旱的准确性。 展开更多
关键词 温度植被干旱指数 干旱监测 多时次方法 土壤相对湿度
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基于多源遥感数据与模型对比的冬小麦土壤含水量区域监测研究
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作者 吴东丽 刘聪 +5 位作者 郭超凡 丁明明 吴苏 阙艳红 姜明梁 李雁 《中国农学通报》 2024年第25期147-154,共8页
实时、精准的土壤水分含量监测是农业用水管理的基础,探究冬小麦土壤水分反演的最优模型对于提高农业用水效率和可持续发展均具有重要的意义。本研究以河南省鹤壁市浚县冬小麦种植区域的土壤水分含量为研究对象,采用无人机遥感数据、卫... 实时、精准的土壤水分含量监测是农业用水管理的基础,探究冬小麦土壤水分反演的最优模型对于提高农业用水效率和可持续发展均具有重要的意义。本研究以河南省鹤壁市浚县冬小麦种植区域的土壤水分含量为研究对象,采用无人机遥感数据、卫星遥感数据、田间采样数据,分别运用温度植被干旱指数模型、水云模型和改进的水云模型3种方法,进行土壤含水量反演对比分析与最优模型选择。结果表明,3种方法中10 cm深度的反演精度均高于20 cm,且R^(2)均大于0.4。其中采用改进的水云模型方法在10 cm深度的R^(2)为0.7055、RMSE为0.0209,20 cm深度的R^(2)为0.5069、RMSE为0.0271,优于水云模型和温度植被干旱指数的反演效果。因此,改进的水云模型是一种适合用于麦田土壤水分反演的方法,它能够提供较高的反演精度。 展开更多
关键词 冬小麦 土壤水分含量监测 土壤水分反演 反演精度 无人机遥感 卫星遥感 温度植被干旱指数模型 水云模型
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基于温湿度控制设计地下抗裂防渗漏混凝土的应用研究
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作者 赵群 田景松 王建光 《江西建材》 2024年第S01期162-165,共4页
文中基于温湿度控制思路,通过大掺量粉煤灰、多级配低空隙率骨料、分段补偿收缩和温湿度监测调控等成套技术设计抗裂防渗漏混凝土,以缓解或彻底消除地下结构开裂渗漏。
关键词 温度裂缝 大掺量粉煤灰 温湿度监测调控
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六盘山区华北落叶松人工林小气候特征
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作者 杨文海 杨志莲 +3 位作者 王彦辉 李向栋 王正安 陈炜 《陆地生态系统与保护学报》 2024年第2期32-41,共10页
【目的】实测华北落叶松(Larixgmelinii var.principis-rupprechtii)人工林的林内和林窗小气候特征,认识森林的小气候调节作用,为促进林下更新和森林多种功能利用提供科学依据。【方法】在宁夏六盘山南部半湿润区,建立林内(林龄40 a,郁... 【目的】实测华北落叶松(Larixgmelinii var.principis-rupprechtii)人工林的林内和林窗小气候特征,认识森林的小气候调节作用,为促进林下更新和森林多种功能利用提供科学依据。【方法】在宁夏六盘山南部半湿润区,建立林内(林龄40 a,郁闭度0.52)和林窗(面积750 m^(2))小气候观测样地,用自动气象站从2022年12月起连续一年监测气象指标和10 cm深土壤温度湿度,并依据标准气象站数据与海拔的关系线性插值得到林外气象数据作为对照。【结果】与林外相比,林内和林窗有明显的小气候调节作用,这表现在:1)年均太阳辐射日累积值(MJ/m^(2))为林内(4.53)<林窗(8.87)<林外(13.99),林内和林窗仅为林外的32.4%和63.4%;林内和林窗与林外的月均太阳辐射累积值的差在生长季大于非生长季。2)年均气温(℃)为林内(7.2)<林外(7.5)<林窗(7.8),气温日较差(℃)为林内(6.1)<林窗(6.3)<林外(8.0),林内和林窗的气温变化更平缓;林内、林窗、林外之间的气温差平均值在生长季小于非生长季。3)年均空气相对湿度(%)为林内(69.1)>林窗(64.7)>林外(62.5),林内和林窗比林外提高了6.6%和2.2%,林内和林窗在生长季提高空气湿度的能力大于非生长季。4)10 cm深土壤温度年均值(℃)为林内(6.8)<林窗(8.8)<林外(9.1),林内和林窗比林外低2.3℃和0.3℃;土壤温度日较差(℃)为林内(0.7)<林窗(1.5)<林外(4.5);林内和林窗土壤温度与林外相比在生长季降低但在冬季提高。5)10 cm深土壤湿度年均值(%)为林内(24.4)<林窗(29.8)<林外(33.8),林内和林窗比林外降低了9.4%和4.0%,林内与林外土壤湿度差在生长季小于非生长季,林窗与林外土壤湿度差在生长季大于非生长季。【结论】华北落叶松人工林的小气候调节作用明显,且在生长季大于非生长季。与林外相比,林内和林窗大幅降低了太阳辐射、土壤温度、土壤湿度,但显著提高了空气湿度,还减小了各指标变幅、调节了峰值时间,对空气温度有良好的调控缓冲作用。 展开更多
关键词 森林小气候 林内 林窗 太阳辐射 空气温度湿度 土壤温度湿度
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基于LoRa的粮仓环境监测系统设计
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作者 沈莉丽 《工业控制计算机》 2024年第8期32-33,共2页
针对粮仓监测范围大、传输距离远、功耗高等问题,深入研究LoRa无线通信、传感器、云服务器等技术,设计粮仓环境监测系统,采集节点采集并发送温湿度数据至网关,网关收到数据后将其发送到物联网云平台,并使用微信小程序实现对数据的实时显... 针对粮仓监测范围大、传输距离远、功耗高等问题,深入研究LoRa无线通信、传感器、云服务器等技术,设计粮仓环境监测系统,采集节点采集并发送温湿度数据至网关,网关收到数据后将其发送到物联网云平台,并使用微信小程序实现对数据的实时显示,从而实现了对粮食仓储环境的有效监测。 展开更多
关键词 LoRa 单片机 温湿度 环境监测
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基于窄带物联网的茶叶灭虫控制系统研究 被引量:3
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作者 彭炜峰 罗静 +2 位作者 张洲亚 李光林 余金洋 《农机化研究》 北大核心 2024年第1期84-89,共6页
为克服当前物联网在丘陵地区农业生产过程中存在通信距离短、消耗功率大、终端数量易饱和等问题,以茶叶虫害防治为研究对象,将窄带物联网技术与农业生产相结合,实时精准监测土壤温湿度,并根据土壤温湿度数据变化远程控制茶叶灭虫电磁阀... 为克服当前物联网在丘陵地区农业生产过程中存在通信距离短、消耗功率大、终端数量易饱和等问题,以茶叶虫害防治为研究对象,将窄带物联网技术与农业生产相结合,实时精准监测土壤温湿度,并根据土壤温湿度数据变化远程控制茶叶灭虫电磁阀启闭状态,设计了智能茶叶灭虫控制系统,并优化了超级电容太阳能电源管理、无线传感网络监测、远程监测控制等核心技术及关键模块。试验结果表明:系统运行稳定,能通过窄带物联网技术实时监测、传输土壤温湿度信息,终端可实时远程控制茶叶灭虫电磁阀,实时启闭茶叶灭虫系统,达到了实时精准监测和远程控制的目的。研究弥补了当前物联网在农业生产中应用的不足,提高了太阳能电源使用效率,延长了蓄电池使用寿命,可为我国智慧农业发展提供参考。 展开更多
关键词 窄带物联网 超级电容 土壤温湿度 远程监控 灭虫控制 茶叶
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间歇运行下地埋管周围土壤热湿特性实验研究
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作者 徐昭 何伟 +3 位作者 王义天 贾臻 邾茂盛 庾汉成 《太阳能学报》 EI CAS CSCD 北大核心 2024年第6期44-50,共7页
搭建地源热泵地埋管周围土壤热湿传递的试验台,对初始含水率、防水层、保温层以及相变回填材料等因素对土壤热量和水分传递的影响进行探究。沙箱实验结果表明:竖直埋管的热量会引起周围土壤的温度传递和水分迁移,土壤初始含水率的提高... 搭建地源热泵地埋管周围土壤热湿传递的试验台,对初始含水率、防水层、保温层以及相变回填材料等因素对土壤热量和水分传递的影响进行探究。沙箱实验结果表明:竖直埋管的热量会引起周围土壤的温度传递和水分迁移,土壤初始含水率的提高有利于温度恢复和地埋管换热,系统运行期间的温度峰值随初始含水率的增加而降低,防水层、保温层和相变回填材料也会对温度峰值和温度恢复产生影响。温度梯度和水力梯度是引起水分迁移的主要因素,在15%初始含水率时,温度梯度占据主导,驱动水分沿径向向远处扩散;在25%初始含水率时,水力梯度占据主导,水分沿深度向下渗透。 展开更多
关键词 地源热泵 土壤温度 土壤湿度 相变材料
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温湿度场仿真模拟在博物馆环境监测中的应用研究
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作者 唐铭 钱玮昕 +5 位作者 张欢 丁荣良 陈庆庆 柳敏 刘琳 刘京 《文物保护与考古科学》 北大核心 2024年第2期110-118,共9页
针对博物馆当前的环境监测方式无法全面感知温湿度空间分布的问题,本研究引入与数据同化(EnKF)算法相结合的计算流体动力学(CFD)模拟方法,以某博物馆的展厅空间为例,获得可视化的温湿度场仿真模拟结果,并结合藏品保护要求进行数据分析... 针对博物馆当前的环境监测方式无法全面感知温湿度空间分布的问题,本研究引入与数据同化(EnKF)算法相结合的计算流体动力学(CFD)模拟方法,以某博物馆的展厅空间为例,获得可视化的温湿度场仿真模拟结果,并结合藏品保护要求进行数据分析和相关讨论。经与实时监测数据对比,基于数据同化的CFD模拟准确性良好,误差在可接受范围内。本研究引入的技术方法实现了博物馆环境监测从“点监测”到“场监测”的转变,后续可为博物馆藏品预防性保护提供更加科学有效的技术支撑。 展开更多
关键词 博物馆 环境监测 温湿度场 仿真模拟
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基于Landsat 8数据和温度-植被指数的干旱监测 被引量:20
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作者 季国华 胡德勇 +1 位作者 王兴玲 乔琨 《自然灾害学报》 CSCD 北大核心 2016年第2期43-52,共10页
结合Landsat 8数据特征提高遥感反演土壤水分的精度,对旱灾的监测具有重要意义。主要是利用Landsat 8数据,基于植被指数(NDVI)-地表温度(T_s)特征空间理论,通过对植被指数和"干边"的修订,分别计算温度植被干旱指数(TVDI)、干... 结合Landsat 8数据特征提高遥感反演土壤水分的精度,对旱灾的监测具有重要意义。主要是利用Landsat 8数据,基于植被指数(NDVI)-地表温度(T_s)特征空间理论,通过对植被指数和"干边"的修订,分别计算温度植被干旱指数(TVDI)、干边修订的改进型温度植被干旱指数(MDTVDI);并结合当地气象数据、野外实测土壤水分数据,对计算结果进行了对比。结果表明:在使用Landsat 8OLI和TIRS数据时,TVDI,MDTVDI与地表土壤水分线性相关显著(α=0.05),两者都能表征地表的干旱分布情况;同时,MDTVDI与实测土壤水分的相关性和反演的土壤水分精度略高于TVDI,因此MDTVDI能够更好地反映区域土壤水分状况,更适于区域干旱监测。 展开更多
关键词 温度-植被干旱指数 土壤水分 干旱监测 LandSAT 8
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猕猴桃树干液流特征及其对环境因子的响应
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作者 朱存洲 韩威 +5 位作者 陈维榕 邹玮 王虎 韦权高 李莉婕 赵泽英 《贵州农业科学》 CAS 2024年第7期71-80,共10页
【目的】探明环境因子对猕猴桃树液流特征的影响,为科学制定猕猴桃树灌溉方案提供依据。【方法】以2023年生长季(4—9月)的6年生猕猴桃树为试材,采用热扩散法对猕猴桃植株液流进行1个生长季的连续测量,结合气象及土壤数据分析环境因素(... 【目的】探明环境因子对猕猴桃树液流特征的影响,为科学制定猕猴桃树灌溉方案提供依据。【方法】以2023年生长季(4—9月)的6年生猕猴桃树为试材,采用热扩散法对猕猴桃植株液流进行1个生长季的连续测量,结合气象及土壤数据分析环境因素(气温、降水、辐射、蒸汽压亏缺、土壤湿度和温度等)与猕猴桃植株液流的关系。【结果】生长季猕猴桃树干平均液流速率为43.607~355.775 g/h,液流日累积量7月>6月>8月>9月>5月>4月。不同月份猕猴桃树液流特征存在相似性,0:00—24:00呈低-高-低变化趋势。不同天气条件下小时尺度果树液流速率规律相同,但树干液流速率峰值存在差异,表现为晴天>阴天>雨天,且晴天、阴天和雨天条件下树干液流速率与太阳净辐射强度(Rn)、水汽压亏缺(VPD)、20 cm土壤温度(T)均呈正相关关系,与空气相对湿度(H)均呈负相关关系。晴天、阴天、雨天树干液流速率与4个环境因子的多元回归拟合方程分别为F=4894.222+8.078e^(-5)Rn+284.579VPD-256.581T+10.019H(R^(2)=0.866)、F=-5220.102+3.410e^(-5)Rn+288.798VPD+181.098T+9.861H(R^(2)=0.855)、F=-2345.668+9.976e^(-6)Rn-4.915VPD+103.162T-0.482H(R^(2)=0.568)。【结论】猕猴桃树耗水量在不同月份、不同天气条件下存在明显差异,7月、8月晴天猕猴桃树干日蒸腾量最大,可适当蓄水、增加灌溉。 展开更多
关键词 猕猴桃 液流速率 太阳净辐射强度 水汽压亏缺 土壤温度 空气相对湿度
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The Concept and Design of Safety Management Innovation in the Use of Medical Equipment:Design of Real-time Monitoring System for Temperature and Humidity of Infant Incubator Based on Internet of Things in China
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作者 YIN Jiao-jiao WANG Xi 《Chinese Journal of Biomedical Engineering(English Edition)》 CAS 2021年第4期162-171,共10页
Ensuring safety in the use of medical equipment is an important guarantee for clinical diagnosis and treatment.Because medical equipment is mostly electrical and electronic equipment,the suddenness of its failure is i... Ensuring safety in the use of medical equipment is an important guarantee for clinical diagnosis and treatment.Because medical equipment is mostly electrical and electronic equipment,the suddenness of its failure is inevitable.Although some equipment has regular preventive maintenance and metrological calibration,it is patient-free static calibrated.In China,because of its large population,large patient base,and large use of medical equipment,nurses are too busy taking care of patients and cannot pay attention to the safety of the use of each device.Therefore,we propose using the Internet of Things and IT technology to carry out real-time monitoring and alarming of important parameters of some special,high-risk,and large-used medical equipment,so as to strengthen the safety management of equipment use.Through the management innovation,this article successfully implemented real-time monitoring of the temperature and humidity of the neonatal incubator;and greatly improved the safety in the use of such equipment. 展开更多
关键词 safe use real-time monitoring dynamic management temperature and humidity
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全生物降解地膜在辣椒生长上的应用效果研究
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作者 李洁 邹颖韧 +2 位作者 罗萌 李燕凌 郑井元 《湖南生态科学学报》 CAS 2024年第4期91-97,共7页
【目的】探明全生物降解地膜覆盖在辣椒生产上的应用效果。【方法】以普通聚乙烯(PE)膜覆盖、无覆盖栽培为对照,监测全生物降解地膜覆盖对辣椒栽培过程中土壤温度和湿度的影响,并比较普通膜覆盖与全生物降解地膜覆盖下辣椒形态指标、光... 【目的】探明全生物降解地膜覆盖在辣椒生产上的应用效果。【方法】以普通聚乙烯(PE)膜覆盖、无覆盖栽培为对照,监测全生物降解地膜覆盖对辣椒栽培过程中土壤温度和湿度的影响,并比较普通膜覆盖与全生物降解地膜覆盖下辣椒形态指标、光合参数以及辣椒产量的变化,观测生物地膜的降解情况。【结果】全生物降解地膜对土壤的增温保湿效果与PE膜相比没有显著差异,在中午的增温效果优于PE膜,PE膜覆盖和降解地膜覆盖的辣椒产量分别高于无地膜覆盖下的辣椒产量6.48%、5.73%;全生物降解地膜易撕裂,降解诱导期为70 d,覆膜后6个月进入碎裂期,不会有残膜堆积,不用进行回收。【结论】使用全生物可降解地膜对土壤的增温保湿效果以及在辣椒的生长发育、产量方面与普通PE膜效果相当,但能减少地膜残留及人工回收成本。 展开更多
关键词 全生物降解地膜 辣椒 土壤温湿度 辣椒产量 降解时期
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碳中和背景下光伏阵列对沙漠地区微气候的影响 被引量:1
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作者 张呈春 张维福 +1 位作者 董智今 展秀丽 《甘肃农业大学学报》 CAS CSCD 北大核心 2024年第5期228-236,245,共10页
【目的】为更好地掌握沙漠地区光伏阵列对局地微气候的影响。【方法】选取宁夏中卫沙漠光伏产业园作为研究区域,采用自动气象站实地观测,对比分析光伏电站内与流动沙丘(对照点)气象要素和土壤温湿度的变化特征及差异。【结果】与流动沙... 【目的】为更好地掌握沙漠地区光伏阵列对局地微气候的影响。【方法】选取宁夏中卫沙漠光伏产业园作为研究区域,采用自动气象站实地观测,对比分析光伏电站内与流动沙丘(对照点)气象要素和土壤温湿度的变化特征及差异。【结果】与流动沙丘(对照点)相比,光伏电站内2 m高度空气温度增加了0.13℃,空气湿度提高了0.85%,太阳辐射量降低了11.87 W/m^(2),平均风速减少了1.35 m/s;站内偏南北方向的风明显减少,主风向由原来的东北风转变为东风,风向更加单一;光伏电站内空气温度日较差显著高于站外,空气湿度日较差大于站外,夜间差异明显。电站内土壤温度分别为22.76℃(10 cm)、23.13℃(20 cm)、22.94℃(30 cm),较流动沙丘(对照点)分别降低1.5℃、1.11℃、0.74℃;电站内土壤含水量分别为7.35%(20 cm)、8.58%(30 cm),较流动沙丘(对照点)分别增加了1.2%、0.73%;与流动沙丘(对照点)相比,夜间(8时前和21时后)光伏电站内土壤温度(10 cm)上升,4时至9时光伏电站内土壤温度(20 cm)上升;不同时刻光伏电站内不同深度土壤含水量均高于流动沙丘(对照点)。【结论】光伏阵列对近地表气象要素和土壤温湿度影响明显,站内空气温湿度具有复杂的昼夜变化特征;光伏阵列的布设可改善沙漠地区的环境因子,增加空气湿度、土壤含水量,降低太阳辐射和风速,发挥着防风固沙的作用。本研究结果可为沙漠地带未来光伏电站的可持续发展提供理论支撑,对荒漠区风光电建设的生态保护与修复具有重要的指导意义。 展开更多
关键词 微气候 土壤温湿度 光伏阵列 腾格里沙漠
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