نتایج جستجو برای: 03 âc decade for annual minimum and maximum temperature

تعداد نتایج: 19140276  

Journal: :journal of rangeland science 2014
amir saadatfar hossein barani abdol reza bahremand ali reza massah bavani adel sepehry

rangelands are one of the most vulnerable parts concerning the climatechanges‟ impacts. these impacts are even stronger in the arid and semi-arid areas whererangeland ecosystems are in critical conditions. therefore, it is crucial to figure out theactual dynamics of climate variations on the rangelands. the aim of this research was todetermine climate changes in khabr rangeland, kerman, iran. s...

The use of cutting fluid in manufacturing industries has now become more problematic due to environmental pollution and health related problems of employees. Also the minimization of cutting fluid leads to the saving of lubricant cost and cleaning time of machine, tool and work-piece. The concept of minimum Quantity Lubrication (MQL) has come in to practice since a decade ago in order to overco...

Journal: :Mausam 2023

Climate change-related changes in temperature and precipitation trends must be investigated at local, regional global levels. Temperature two selected regions having tropical wet montane climates (i.e., Colombo Nuwara Eliya respectively) Sri Lanka were studied for a 30 year period from 1989 to 2019, evaluate the temporal dynamics of climate change. Precipitation analyzed on annual, monthly, sea...

2004
J. B. NIPPERT

1. The capacity to perform photosynthesis, given appropriate environmental conditions, is reflected by measurements of the maximum quantum yield of photosystem II ( F v / F m ). The seasonal course of F v / F m may help define the length of the annual photosynthetic period in temperate evergreen forests. 2. F v / F m was measured 31 times from September to May on six conifer species located alo...

Journal: :جغرافیا و توسعه ناحیه ای 0
کمال امیدوار معصومه نبوی زاده

precipitation is one of important parameters of climatology and atmospheric science that have more importance in human life. recently, extensive flood and drought entered many damage to most parts of the world. precipitation forecasting and alerts management role is responsible for these problems. today, artificial neural networks are one of developed method that applied for estimate and predic...

2008
Liming Zhou Cheng-Zhi Zou Yuhong Tian Haishan Chen

This paper analyzes the spatial dependence of annual diurnal temperature range (DTR) trends from 1950– 2004 on the annual climatology of three variables: precipitation, cloud cover, and leaf area index (LAI), by classifying the global land into various climatic regions based on the climatological annual precipitation. The regional average trends for annual minimum temperature (Tmin) and DTR exh...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یاسوج - دانشکده علوم 1391

in this investigation the effect of external field on the electron density of nanostructures of cds, cdse, cdte, gaas and polymeric structure of three, four, five and six units of cds as a kind of nanosolar cells has been studied theoretically. as modeling this system in nanodimension, molecular structures has used. specific properties of molecular structures permit us to consider different sym...

Journal: :Water Science & Technology: Water Supply 2022

Abstract This study aims to analyze the spatial and temporal variability of precipitation, temperature drought in Penang from 1985 2020. The trend magnitude changes climate series were tested using Mann–Kendall test Sens’ slope methods. A significant increasing annual precipitation was detected middle northern parts mainland by 21.38 35.01 mm/decade. Annual mean maximum increased significantly ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389

in this project, some new polyaspartimides, (pas)s, have been synthesized form michael addition reaction between new synthetic bismaleimide (bmi) and some aromatic diamines. a characteristic property of this polyaspartimides is a pendent carboxylic group, which introduced to these polymers from new bismaleimide. bismaleimides (bmi) is one of the interesting compounds, which can be self-polymeri...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم پایه 1392

a novel and ultra low cost isfet electrode and measurement system was designed for isfet application and detection of hydronium, hydrazinium and potassium ions. also, a measuring setup containing appropriate circuits, suitable analyzer (advantech board), de noise reduction elements, cooling system and pc was used for controlling the isfet electrode and various characteristic measurements. the t...

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