نتایج جستجو برای: center pivot

تعداد نتایج: 286528  

2013
Chris Hayot Sophie Sakka Vincent Fohanno Patrick Lacouture

In this study, we propose to simulate the center of mass trajectory during walking using a tridimensional Extended Inverted Pendulum model. For the single support trajectory simulation, we consider a modified tridimensional inverted pendulum introducing the forward displacement of its pivot point as the center of pressure translation. The model introduces a representation of the double support ...

2002
Wallace Wilhelm L. N. Mielke J. R. Gilley W. W. Wilhelm

reduce the amount of water used, resulting in savings Low-pressure sprinkler irrigation systems have the potential to of both water and energy. save energy, but also may aggravate soiland water-management Center-pivot systems with high pressure nozzles reproblems. The objective of this research was to determine the influquire relatively large amounts of energy to develop ence of center-pivot sp...

Journal: :تحقیقات آب و خاک ایران 0
یاسر حمدی احمد آباد دانشجو کارشناسی ارشد عبدالمجید لیاقت استاد گروه آبیاری آبادانی دانشگاه تهران تیمور سهرابی استاد گروه آبیاری و آبادانی دانشگاه تهران علی رسول زاده دانشیار گروه مهندسی آب دانشگاه محقق اردبیلی امین لیاقت دانشجوی کارشناسی ارشد آبیاری و زهکشی دانشگاه تهران

evaluating the implemented sprinkler irrigation systems, made it possible to determine these systems level of success; and presented practical solutions to improve the efficiency of these systems and offered suggestions for future systems. the main objective of this study was to evaluate the status and performance of the implemented center pivot systems in the study area. in this study, 5 cente...

2017
Sahab Omran Sophie Sakka Yannick Aoustin

This paper proposes an analysis of the effect of vertical position of the pivot point of the inverted pendulum during humanoid walking. We introduce a new feature of the inverted pendulum by taking a pivot point under the ground level allowing a natural trajectory for the center of pressure (CoP), like in human walking. The influence of the vertical position of the pivot point on energy consump...

Journal: :Agronomy 2021

The center pivot irrigation system is a type of technology used to apply water effectively and uniformly over wide variety areas topographies. These systems’ uniformity application greatly affects use, energy consumption, crop production. Performance tests the standard lateral galvanized modified polyethylene plastic pipes in systems were conducted different regions Saudi Arabia. Water distribu...

2011
John Tooker

Excessive, wasted water has prompted the creation of the Top 10 Water Challenges of Nebraska [1]. 70% of the world’s water usage is related to agriculture [7], more efficient irrigation solutions promise a large benefit for farmers, consumers and the environment. Through a USGS grant, the Cyber-Physical Networking Lab at the University of Nebraska-Lincoln has pledged to complete an autonomous i...

Journal: :Water 2022

Design strategies to enhance modern irrigation practices, reduce energy consumption, and improve water use efficiency crop yields are fundamental for sustainability. Concerning Center-Pivot Irrigation Systems, different design procedures aimed at optimizing have been proposed. Recently, following a gradually decreasing sprinkler spacing along the pivot lateral with constant diameter flow rate, ...

2008
C.

The objective of this paper is to summarize the history, procedures, and results of a long-term program of inventorying center-pivot irrigation systems in Nebraska. Data concerning the location of pivots have been collected each year from 1972 to the present, and summarized annually as a map publication. Inventory procedures are simplistic, consisting of identifying and mapping occurrences of t...

Journal: :Agricultural & Environmental Letters 2022

The decline in groundwater supply the Texas High Plains is forcing some growers to convert center-pivot irrigated cropland dryland production. Transitioning toward reduced water input can lead declines soil health. We assessed short-term changes health indicators two transition scenarios: (a) from high irrigation method low (center pivot subsurface drip) and (b) dryland), comparison continuous ...

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