检索结果-南通市图书馆

Performance comparison of mono and polycrystalline silicon solar photovoltaic modules under tropical wet and dry climatic conditions in east-central India

引用

Clean Energy 2022年第1期6卷 165-177页

作者： Niranjan Singh Baghel Nikhil Chander Department of Electrical Engineering and Computer Science Indian Institute of Technology BhilaiGEC CampusSejbaharRaipur-492015ChhattisgarhIndia

This work focuses on the performance comparison of monocrystalline and polycrystalline Si solar photovoltaic(SPV)modules under tropical wet and dry climatic conditions in east-central India(21.16°N 81.65°E,Raipur,Chhattisgarh).This study would help to select the SPV module for system installation in the east-central part of the country.For comparative analysis,we used performance ratio(PR)and efficiency as figures of merit.The plane-of-array(POA)irradiance was used to determine the efficiency of the modules.The decomposition and transposition models calculated the POA values from the measured global horizontal irradiance.The data were analysed systematically for 6 months in the non-rainy season,from October 2020 to March 2021.Special attention was given to solar irradiance,ambient temperature and module temperature-the parameters that affect the performance of PV modules.The month of October showed the highest variation in irradiance and temperature.The highest average module temperatures(51-52℃)were observed in October-November,while the lowest average module temperatures(34℃ for mono-Si and 36℃ for poly-Si)were observed in December.The highest value of average monthly POA irradiance(568 W/m^(2))was observed in February and the lowest(483 W/m^(2))in December.The results showed that the monocrystalline SPV module performed better than the polycrystalline module under all weather conditions.The maximum observed values of mono-Si and poly-Si panel PRs were 0.89 and 0.86,respectively,in December.

关键词： solar photovoltaic performance climatic conditions global horizontal irradiance plane-of-array

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Morphological Characteristics of Thymus in the Newborns in Different climatic and Geographical conditions of Kyrgyzstan

引用

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2020年第4期9卷 178-185页

作者： Tamara Abaeva Zhanibek Muratov Rustam Tukhvatshin Zhypargul Abdullaeva Aziza Seitova Veronika Tursunova Mira Zhanganaeva Masalbek Satybaldiev Lazokatkhan Dzhumaeva Meerim Abdyraimova Feruza Mamasadykova Aiperi Alimbekova Department of Normal and Topographic Anatomy of I.K. Akhunbaev Kyrgyz State Medical Academy Bishkek Kyrgyzstan Department of Pathology Basic and Clinical Pharmacology International Medical Faculty Osh State University Osh Kyrgyzstan Department of Pathological Physiology I.K. Akhunbaev Kyrgyz State Medical Academy Bishkek Kyrgyzstan Department of Anatomy Histology and Normal Physiology International Medical Faculty Osh State University Osh Kyrgyzstan Science and Research Department Osh State University Osh Kyrgyzstan Department of Clinical Disciplines 2 International Medical Faculty Osh State University Osh Kyrgyzstan

This paper is describing a detailed study of morphological structures and characteristics newborns thymus in different climatic and geographical conditions of Kara-Balta, Cholpon-Ata, and Bishkek in Kyrgyzstan. Anatomical structure research done on 26 thymuses of newborn corpses. Research results showed that a significant amount of thymuses consisted of lobes with very thin connective tissues between them. It is observed that the Hassall cells were usually located in the medulla part of the thymus after using the coloring by Van-Gieson’s stain visible clear elastic and collagen fibers. In addition, cell population dynamics in a unit of conditional area of cortical substance thymus lobes in newborns determined.

关键词： Thymus Newborns Hassall Cells climatic conditions Histological Methods

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of climatic conditions on Planting of Hami Melon

引用

Asian Agricultural Research 2018年第2期10卷 82-86页

作者： Jiangang WANG Min JIANG Yuchao LI Guangjun LI Altay Meteorological Bureau Altay 836500 China Altay Seed Station Altay 836500 China

Climate warming has made the planting area of Hami melon expand northward to Barry Bakai Town,Altay City,near 47° N. Climate events often induce the occurrence of pests and diseases in crops,affecting the steady production of Hami melon. In 2013,pests and diseases occurred seriously,resulting in low yield and poor quality of Hami melon. Based on the production survey data of Hami melon in recent20 years,the interaction of various meteorological factors in different time and different intervals of various factors was analyzed in this paper to explore the characteristics of the meteorological factors that cause diseases and influence the quality of Hami melon.

关键词： climatic conditions Hami melon Planting Impact analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Hybrid Neural Network-based Approach for Forecasting Water Demand

引用

Computers, Materials & Continua 2022年第10期73卷 1365-1383页

作者： Al-Batool Al-Ghamdi Souad Kamel Mashael Khayyat Department of Computer Science and Artificial Intelligence College of Computer Sciences and EngineeringUniversity of JeddahJeddah 21959Saudi Arabia Department of Computer and Network Engineering College of Computer Sciences and EngineeringUniversity of JeddahJeddah 21959Saudi Arabia Department of Information Systems and Technology College of Computer Sciences and EngineeringUniversity of JeddahJeddah 21959Saudi Arabia

Water is a vital resource.It supports a multitude of industries,civilizations,and agriculture.However,climatic conditions impact water availability,particularly in desert areas where the temperature is high,and rain is scarce.Therefore,it is crucial to forecast water demand to provide it to sectors either on regular or emergency days.The study aims to develop an accurate model to forecast daily water demand under the impact of climatic conditions.This forecasting is known as a multivariate time series because it uses both the historical data of water demand and climatic conditions to forecast the future.Focusing on the collected data of Jeddah city,Saudi Arabia in the period between 2004 and 2018,we develop a hybrid approach that uses Artificial Neural Networks(ANN)for forecasting and Particle Swarm Optimization algorithm(PSO)for tuning ANNs’hyperparameters.Based on the Root Mean Square Error(RMSE)metric,results show that the(PSO-ANN)is an accurate model for multivariate time series forecasting.Also,the first day is the most difficult day for prediction(highest error rate),while the second day is the easiest to predict(lowest error rate).Finally,correlation analysis shows that the dew point is the most climatic factor affecting water demand.

关键词： Water demand forecasting artificial neural network multivariate time series climatic conditions particle swarm optimization hybrid algorithm

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Numerical study of solar absorption heat storage system applied to Bucharest city

引用

Building Simulation 2021年第3期14卷 601-616页

作者： Noureddine Cherrad Adrian-Gabriel Ghiaus University Kasdi Merbah ofOuargla Faculty of Applied SciencesDepartment of Mechanical EngineeringOuarglaAlgeria Doctoral School Technical University of Civil Engineering of BucharestBucharestRomania

Buildings represent a large part in terms of fossil energy consumption,which depends on the great need for heating.Even if the solar absorption heat storage system is possible,the performance of this system is affected by the cycle limits and the climatic conditions.The goal of the present study is to control the thermal performance of the system cycle according to the imposed climatic conditions of Bucharest city,Romania,and therefore a numerical model was developed for this purpose.The scheme and the thermodynamic cycle,the energy and mass balance equations,and the computational algorithm were presented.The results show that the cycle temperature increases at the end of desorption when the heating power supplied to the desorber is increased,which is also proportional to the drop in temperature at the beginning of the desorption.The temperature at the end of absorption and the mass flow rates of the solution have a significant effect on the thermal power released from the absorber and used to heat the building.For an average daily heat power of 1.35 kW/m^(2) and 10 hours per day of heating the building,the system with a solar collector area of 3 m^(2) has the capacity of heat supply for all the cold period.However,an economic strategy remains necessary.

关键词： numerical model absorption heat storage cycle temperatures climatic conditions

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Thermal performance of lightweight concrete applications in building envelopes in Lebanon

引用

Building Simulation 2021年第5期14卷 1359-1375页

作者： Emilio Sassine Elias Kinab Yassine Cherif Emmanuel Antczak Michel Nasrallah Lebanese University Habitat and Energy UnitGroup of Thermal and Renewable Energies-Laboratory of Applied Physics(LPA-GMTER)Faculty of SciencesFanar CampusLebanon Lebanese University Faculty of EngineeringRoumiehEl MetnLebanon Univ.Artois ULR4515Laboratoire de Genie Civil et geo-Environnement(LGCgE)BethuneF-62400France CC Technique Memari StreetHamraBeirutLebanon

Innovative building materials are being used in building envelopes for reducing their heating and cooling needs.This paper aims to assess the thermal impact of using lightweight concrete in Lebanese building constructions by pouring an 8 cm thickness of lightweight concrete on the roof and the slab and replacing traditional hollow concrete block by lightweight concrete blocks.Thermal properties of two different samples were experimentally determined:the first one(558 kg/m^(3))used for the roof and the slab and the second one(1074 kg/m^(3))used for the walls.Then numerical simulations were carried out for a Lebanese traditional detached house using the characteristics of these two samples.The thermally improved Light Weight Concrete building(LWC)was compared to a traditional Lebanese house base case(BC)using a dynamic building energy simulation tool in the four different Lebanese climate zones:coastal,mid-mountain,mountain,and inland zones.The results highlight the effectiveness of integrating LWC to building envelopes by reducing energy consumption and improving thermal comfort in both winter and summer climate conditions and in the different Lebanese climatic zones.The paper demonstrates that the use of LWC in the vertical walls replacing the traditional hollow blocks can reduce the heating needs by up to 9%and by up to 13%for cooling needs.On the other hand,adding a LWC roof screed has a very high impact on cooling and heating energy consumption,which can reach up to 74%in cooling energy savings and up to 24%in heating energy savings.

关键词： lightweight concrete thermal properties building energy simulation thermal insulation climatic conditions

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The relationship between soil,climate and forest development in the mid-mountain zone of the Sangong River watershed in the northern Tianshan Mountains,China

引用

Journal of Arid Land 2015年第1期7卷 63-72页

作者： Li DAI YiXing FENG GePing LUO YanZhong LI WenQiang XU School of Geographic and Environmental Sciences Guizhou Normal University State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences

The mountainous forests in arid regions, being sensitive to climate change, are one of the key research topics related to the mechanism of interaction between climate and the terrestrial ecosystem. In this study, the spatial distribution of a mid-mountain forest and its environmental factors were investigated by using a combination of remote sensing technology, field survey, climate indices and soil nutrient analysis in the Sangong River watershed of the northern Tianshan Mountains. The forest （Picea schrenkiana） was distributed between 1,510 and 2,720 m asl. Tree height and diameter at breast height （DBH） exhibited a bi-modal pattern with increasing elevation, and rested at 2,450 and 2,250 m asl, respectively. The two maxima of DBH appeared at 2,000 and 2,550 m asl, and the taller trees were observed at 2,100 and 2,600 m asl. For the annual mean temperature, the difference was approximately 5.8℃ between the lowest and the highest limits of the forest, and the average decreasing rates per hundred meters were 0.4g℃ and 0.55℃ with increasing altitude between 1,500 and 2,000 m asl and above 2,000 m asl, respec- tively. The annual precipitation in the forest zone first increased and then decreased with the increase of altitude, and the maximum value was at 2,000 m asl. For per hundred meters, the annual precipitation increased with the rate of 31 mm between 1,500 and 2,000 m asl and decreased by 7.8 mm above 2,000 m asl. The SOM, TN and TP were high between 2,000 and 2,700 m asl and low at the lower and upper forest limits. The minimum CaCO3 con- centration, pH value and EC coincided with the maximum precipitation belt at 2,000 m asl. The SOM, TN and TP were high in the topsoil （0-10 cm） and differed significantly from the values observed in the deep soil layers （〉10 cm）. The soil nutrients exhibited spatial heterogeneity and higher aggregation in the topsoil. In conclusion, soil and climate are closely related to each other, working synergistically to determine the development and spatial distribution of the mid-mou

关键词： mid-mountain forest climatic conditions soil properties Picea schrenkiana arid region central Asia

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multiple common garden experiments suggest lack of local adaptation in an invasive ornamental plant

引用

Journal of Plant Ecology 2011年第4期4卷 209-220页

作者： Susan K.Ebeling Jürg Stöcklin Isabell Hensen Harald Auge Department of Community Ecology UFZHelmholtz Centre for Environmental Research(UFZ)Theodor-Lieser-Strasse 406120 HalleGermany Institute of Geobotany and Botanical Garden Martin-Luther-University Halle-WittenbergAm Kirchtor 106108 HalleGermany Institute of Botany University of BaselScho¨nbeinstrasse 6CH-4056 BaselSwitzerland

Adaptive evolution along geographic gradients of climatic conditions is suggested to facilitate the spread of invasive plant species,leading to clinal variation among populations in the introduced range.We investigated whether adaptation to climate is also involved in the invasive spread of an ornamental shrub,Buddleja davidii,across western and central Europe.Methods We combined a common garden experiment,replicated in three climatically different central European regions,with reciprocal transplantation to quantify genetic differentiation in growth and reproductive traits of 20 invasive B.davidii populations.Additionally,we compared compensatory regrowth among populations after clipping of stems to simulate mechanical damage.Important Findings Our results do not provide evidence for clinal variation among invasive B.davidii populations:populations responded similarly to the different environments,and trait values were not correlated to climatic conditions or geographic coordinates of their home sites.Moreover,we did not detect differences in the compensatory ability of populations.We suppose that the invasive spread of B.davidii has been facilitated by phenotypic plasticity rather than by adaptation to climate and that continent-wide shuffling of cultivars due to horticultural trade may have limited local adaptation so far.

关键词： Buddleja davidii reciprocal transplantation biological invasion geographic clines climatic conditions

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Correlation and Regressive Model Between Spikelet Fertilized Rate and Temperature in Inter-Subspecific Hybrid Rice

引用

Rice science 2007年第2期14卷 125-134页

作者： Lu Chuan-gen Zou Jiang-shi HU Ning YAO Ke-min Institute of Food Crops Jiangsu Academy of Agricultural Sciences Nanjing 210014 China Nanjing University of Information Science and Technology Nanjing 210044 China

To study the sensitivity of inter-subspecific hybrid rice to climatic conditions, the spikelet fertilized rate （SFR） of four types of rice including indica-japonica hybrid, intermediate hybrid, indica and japonica were analyzed during 2000-2004. The inter-subspecific hybrids showed lower SFR, and much higher fluctuation under various climatic conditions than indica and japonica rice, showing the inter-subspecific hybrids were sensitive to ecological conditions. Among 12 climatic factors, the key factor affecting rice SFR was temperature, with the most significant factor being the average temperature of the seven days around panicle flowering （T7）. A regressive equation of SFR-temperature by T7, and a comprehensive synthetic model by four important temperature indices were put forward. The optimum temperature for inter-subspecific hybrids was estimated to be 26.1-26.6℃, and lower limit of safe temperature to be 22.5-23.3℃ for panicle flowering, showing higher by averagely 0.5℃ and 1.7℃, respectively, to be compared with indica and japonica rice. This suggested that inter-subspecific hybrids require proper climatic conditions. During panicle flowering, the suitable daily average temperature was 23.3-29.0℃, with the fittest one at 26.1-26.6℃. For an application example, optimum heading season for inter-subspecific hybrids in key rice growing areas in China was as same as common pure lines, while inferior limit for safe date of heading was about a ten-day period earlier than those of common pure lines.

关键词： fertilization inter-subspecific hybrid rice regression temperature climatic conditions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：