برای دانلود مقاله علمی لاتین خود از پایگاه های علمی همچون Science Direct , Elsevier, Cambridge Journals , Emerald , Highwire Press , JSTOR , NTIS (EV2) Scopus ,Web of Science (ISI), IEEE , Springerk , ACM , Proquestمی توانید مشخصات مقاله در خواستی خود را در این تالار اعلام کنید تا توسط توسط دیگر اعضا، دانلود و در اختیارتان قرار گیرد.
پاسخ: دانلود مقاله از ScienceDirect
Effects on soil properties
Ridge tillage effects on simulated water and heat transport ![star, open]( "star, open") J.G. Benjamina, A.D. Blaylocka, H.J. Browna and R.M. Crusea
aDepartment of Agronomy, Iowa State University, Ames, IA 50011, U.S.A.
Accepted 12 October 1989.
Available online 1 July 2003.
Abstract
Ridged soil surface configurations are often used as a management tool to improve the plant root environment. Possible benefits for ridge tillage systems include warmer and dryer seed-zone soil conditions in the spring, better control of wheel-traffic patterns, and better crop residue management for erosion control. This study compared soil physical properties in the plant row, the untracked interrow, and the wheel-tracked interrow positions for a ridge tillage system on three soils. Soil property information was used to model the effects of soil variability and ridge height on subsurface water and heat transport. Simulated water and heat flow in a ridge seemed to be different from that of a flat surface. Taller ridges had a greater influence on water and heat movement than shorter ridges. There seems to be an optimum ridge height for fastest warming and drying. Variable soil properties affected predicted soil temperature distributions less than predicted matric potential distributions. The compacted zone had a lower matric potential deep in the profile and a higher matric potential near the surface than the uncompacted zone.
لینک دانلود مقاله
برای دانلود مقاله دوم می توانید از سرویس دانلود مقاله استفاده کنید.
|
پاسخ: دانلود مقاله از ScienceDirect
مقاله از سايت Science Direct
Laser-assisted machining of hardened steel parts with surface integrity analysis
The Workpiece Material-Laser Interaction and the Laser-Assisted Machining
Modelling the aspects of precision and efficiency in laser-assisted jet electrochemical machining
An experimental study of laser-assisted machining of hard-to-wear white cast iron
Laser-assisted machining of compacted graphite
Deformation mechanisms and constitutive modeling for silicon nitride undergoing laser-assisted machining
Investigation of a novel hybrid process of laser drilling assisted with jet electrochemical machining
Machinability improvement of titanium alloy (Ti–6Al–4V) via LAM and hybrid machining
Optimization of the process parameters affecting the microstructures and properties of compacted graphite iron
Comprehension of chip formation in laser assisted machining
|
پاسخ: دانلود مقاله از ScienceDirect
با سلام من این مقاله رو خیلی فوری احتیاج دارم. نمیتونم از جایی دانلود کنم. ممنون میشم اگه کمکم کنید
www.sciencedirect.com
Influence of cement type on ITZ porosity and chloride resistance of self-compacting concrete
Andreas Leemann, a, , Roman Losera and Beat Müncha
a Empa, Swiss Federal Laboratories for Materials Testing and Research, Überlandstr. 129, CH-8600 Dübendorf, Switzerland
Received 1 October 2008; revised 10 November 2009; accepted 13 November 2009. Available online 20 November 2009.
Abstract
With the increasing use of self-compacting concrete (SCC) its durability has come into focus. Concerning the microstructure of concrete, the porosity in the interfacial transition zone (ITZ) is regarded as a key feature for permeability and durability. Generally, a combination of cement and mineral admixtures is used for the production of SCC. In the present study, ITZ porosity of four SCC mixtures produced with ordinary Portland cement, Portland limestone cement, slag cement and ordinary Portland cement combined with fly ash is analyzed. Additionally, the chloride migration coefficient is determined. ITZ porosity and width of the SCC mixtures are similar. The substantial differences in the chloride migration coefficients show that the binder type has a stronger influence on permeability than the pore volume in the ITZ.
Keywords: Interfacial transition zone; Permeability; Blended cement; Self-compacting concrete
|
پاسخ: دانلود مقاله از ScienceDirect
با سلام خدمت همه عزیزان و دلسوزان
من به مقالات زیر شدیدا احتیاج دارم اگه کسی بتونه مواردی از اونا رو برام ارسال کنه
کلی ممنون میشم و دعاشون میکنم
A. Kaveh and M. Nikbakht, Improved group-theoretical method for eigenvalue problems of special symmetric structures, using graph theory
, Advances in Engineering Software, 41(2010)22-31.
A. Kaveh, M. Nikbakht and H. Rahami, Improved group theoretic method using graphs products,
for the analysis of symmetric-regular structures, Acta Mechanica, Nos. (3-4), 210(2010) 265-289.
A. Kaveh and B. Alinejad, Graph products with specified domains for configuration processing and formation of the adjacency matrices,
Engineering Computations, Issue 2, 27(2010) 205-224
A. Kaveh and K. Koohestani, Formation of graph models for regular finite element meshes, Computer Assisted Mechanics and Engineering Sciences, 16(2009)101-115.
A. Kaveh and B. Alinejad, New graph products of specified domains for configuration processing, PAMM, No. 1, 9(2010)585-586.
A. Kaveh, M. Nikbakht and H. Rahami, Improved group theoretic method using graphs products, for the analysis of symmetric-regular structures, Acta Mechanica, Nos. (3-4), 210(2010) 265-289
A. Kaveh, H. Rahami and M. Nikbakht, Vibration analysis of regular structures by graphs products: cable networks, Computers and Structures, 88(2010)588-601.
A. Kaveh and H. Fazli, Eigensolution of augmented graph products using shifted inverse iteration method, International Journal for Numerical Methods in Engineering, DOI: 10.1002/nme.2842, 18 Feb. 2010.
A. Kaveh and H. Rahami, Eigenvalues of the adjacency and Laplacian matrices for modified regular structural models, Communications in Numerical Methods in Engineering , DOI: 10.1002/cam.1269, Published online 3 June 2009.
A. Kaveh and H. Fazli, Approximate eigensolution of Laplacian matrices for locally modified graph products using implicitly restarted Lanczos method, Submitted for publication, 2010
|
پاسخ: دانلود مقاله از ScienceDirect
با سلام خدمت دوستان گرامی
و تشکر از این کار نیکو
من به دنبال یک مقاله در رشته کامپیوتر می باشم به نام:
Grid resource discovery based on semantically linked virtual organizations
با تشکرات فراوان
|