نتایج جستجو برای: electrical conductivity ec

تعداد نتایج: 264877  

Journal: :ماشین های کشاورزی 0
محمد قاسمی مهدی خجسته پور محمدحسین آق خانی

evaluation of mechanical and electrical properties of agricultural products plays an important role in equipment design and optimizing post-harvest operations. among the crops, tomato and its products are the major processing industries in the world and its economic importance is increasing. considering the importance of the quality and various post harvesting uses of tomato, the evaluation of ...

Journal: :journal of biomedical physics and engineering 0
k ghazikhanlou-sani 1phd student of medical physics, tarbiat modares university, medical physics department, tehran, iran smp firoozabadi 2professor of biomedical engineering, tarbiat modares university, medical physics department, tehran, iranسازمان اصلی تایید شده: دانشگاه تربیت مدرس (tarbiat modares university) l agha-ghazvini assistant professor of radiology, department of radiology, school of medicine and shariati hospital, tehran university oسازمان اصلی تایید شده: دانشگاه تربیت مدرس (tarbiat modares university) h mahmoodzadeh assistant professor of general surgery, imam khomeini hospital, tehran university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences)

introduction: there is many ways to assessing the electrical conductivity anisotropy of a tumor. applying the values of tissue electrical conductivity anisotropy is crucial in numerical modeling of the electric and thermal field distribution in electroporation treatments. this study aims to calculate the tissues electrical conductivity anisotropy in patients with sarcoma tumors using diffusion ...

Journal: :Jurnal Ilmiah Mahasiswa Pertanian 2022

Abstrak. Otomasi adalah sebuah proses yang secara otomatis mengontrol operasi mekanik dan perlengkapan atau juga elektronika dapat menggantikan manusia dalam mengamati mengambil keputusan. Sistem kontrol bagian otak pikiran dari keseluruhan suatu sistem. tersusun komputer, rangkaian elektronik sederhana, peralatan mekanik. Penerapan sistem hidroponik tidak terlepas nutrisi tanaman, biasanya dia...

Journal: :تحقیقات مهندسی کشاورزی 0
داود نیک نژاد عضو هیئت علمی مرکز تحقیقات کشاورزی و منابع طبیعی آذربایجان شرقی حسن رحیمی استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران.

this study investigates the vertical replacement of salts, variability of electrical conductivity (ec) and soil acidity (ph) due to direct electrical current. a plexiglas cylinder 100 cm in depth with a 14 cm radius was used as a soil container and filled with uniform moist soil to 90 cm. during the experiments, the bottom 10 cm of soil in the cylinder was kept saturated. a steel bar was used a...

Journal: :The Science of the total environment 2015
Andrew C Smith Peter M Wynn Philip A Barker Melanie J Leng

The use of speleothems to reconstruct past climatic and environmental change through chemical proxies is becoming increasingly common. Speleothem chemistry is controlled by hydrological and atmospheric processes which vary over seasonal time scales. However, as many reconstructions using speleothem carbonate are now endeavouring to acquire information about precipitation and temperature dynamic...

2004
M. T. Humphreys W. R. Raun K. L. Martin K. W. Freeman G. V. Johnson M. L. Stone

A system of midseason prediction of winter wheat grain yield based on sensed plant growth properties has been established. However, little research has been conducted to determine the relationship of grain yield, sensed plant data, and soil electrical conductivity (EC). This study was carried out to determine if soil EC could be useful in better predicting wheat grain yield. During 2001 and 200...

Journal: :desert 2011
n. shakerian gh.r. zehtabian h. azarnivand h. khosravi

desertification refers to land degradation phenomenon in arid, semi-arid and dry sub-humid areas, resulting from various factors including climate variation and human activities. for evaluation and mapping of desertification many research have been conducted leading to regional and local models. in this research, among different existing methods imdpa was selected and desertification intensity ...

A. Nasirahmadi, and A. A. Soudi, L. Estehghari,

The compounds, lanthanium chromite, lanthanium magnetite and lanthanium ferric oxide were prepared through sol-gel methods in powdered form, then calcinated, peletized, and sintered at various temperatures. Electrical conductivity of these compounds was measured at various temperatures. The effectiveness of strontium as a dopant on electrical conductivity was also investigated. Electrical condu...

2012
Xiaoshuai Pei Lihua Zheng Yong Zhao Menglong Zhang Minzan Li

Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing 100083, China. *Email: [email protected] ABSTRACT: The soil electrical conductivity (EC) refers to the capability for soil to conduct current. It is a comprehensive reflection of soil salinity and moisture. Therefore, acquiring soil EC rapidly and accurately ca...

2008
R. Gabriels

It is well known that growth and yield of horticultural crops can be greatly increased by optimizing the nutritional status of the root environment. Based on plant response, involving numerous fertilizer experiments for the different plants and substrates involved, guidelines can be proposed for optimal nutrient solution and pot substrate conditions. The main factors to be considered are sampli...

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