نتایج جستجو برای: hydraulic hybrid

تعداد نتایج: 219087  

2018
Lei Ding Yingrui Li Limin Gao Zhifeng Lu Min Wang Ning Ling Qirong Shen Shiwei Guo

The photosynthetic rate increases under high-N supply, resulting in a large CO₂ transport conductance in mesophyll cells. It is less known that water movement is affected by nitrogen supply in leaves. This study investigated whether the expression of aquaporin and water transport were affected by low-N (0.7 mM) and high-N (7 mM) concentrations in the hydroponic culture of four rice varieties: (...

2014
Zhekang Du Perry Y. Li Kai Loon Cheong

An approach to control a hydrostatic dynamometer for the Hardware-In-the-Loop (HIL) testing of hybrid vehicles has been developed and experimentally tested. The hydrostatic dynamometer used, which is capable of regeneration, was specifically designed and built in-house to evaluate the fuel economy and control strategy of a hydraulic hybrid vehicle. The control challenge comes from the inertia o...

Journal: :Physiologia plantarum 2010
Jing Cai Uwe Hacke Shuoxin Zhang Melvin T Tyree

Vulnerability curves (VCs) measure the ability of vessels to retain metastable water without embolisms that lower the hydraulic conductivity of stems. The fastest method of measuring VCs is the centrifuge technique and the Cochard cavitron is a method that allows measurement of hydraulic conductivity of stems while they are spinning. This paper describes the pattern of embolism that results aft...

2013
Dong-yun Wang Chen Guan

Optimal control using particle swarm optimization (PSO) is put forward in a parallel hybrid hydraulic excavator (PHHE). A power-train mathematical model of PHHE is illustrated along with the analysis of components' parameters. Then, the optimal control problem is addressed, and PSO algorithm is introduced to deal with this nonlinear optimal problem which contains lots of inequality/equality con...

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
vagharedin akhavan zanjani dept. of restorative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. seyedeh mahsa sheikh-al-eslamian dental research center, research institute of dental sciences, school of dentistry, tehran university of medical sciences, tehran, iran kasra tabari dept. of restorative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran

objectives: maintaining pulp vitality is a main goal in restorative dentistry. introduction of pulp capping agents paved the way to eliminate the shortcomings of these materials and obtain successful restorations. on the other hand, nanotechnology is an emerging field of science with increasing use in dental materials. this study sought to assess the effect of addition of nano-tio2, nano-sio2 a...

2014
Mohammad Ali Karbaschian Dirk Söffker

The main advantage of hybrid powertrains is based on the efficient transfer of power and torque from power sources to the powertrain as well as recapturing of reversible energies without effecting the vehicle performance. The benefits of hybrid hydraulic powertrains can be better utilized with an appropriate power management. In this paper, different types of power management algorithms like of...

2015
B Tóth M Weynants A Nemes A Makó G Bilas G Tóth

A range of continental-scale soil datasets exists in Europe with different spatial representation and based on different principles. We developed comprehensive pedotransfer functions (PTFs) for applications principally on spatial datasets with continental coverage. The PTF development included the prediction of soil water retention at various matric potentials and prediction of parameters to ch...

In this study, a hybrid intelligent model has been designed to predict groundwater inflow to a mine pit during its advance. Novel hybrid method coupling artificial neural network (ANN) with genetic algorithm (GA) called ANN-GA, was utilised. Ratios of pit depth to aquifer thickness, pit bottom radius to its top radius, inverse of pit advance time and the hydraulic head (HH) in the observation w...

ژورنال: علوم آب و خاک 1999
اسلامیان, سیدسعید, چاوشی بروجنی, ستار ,

Designers of hydraulic structures are often faced with the problem of estimating flood frequencies at stream sites, where little or no flow information is available. A regional regression model is widely used which relates physical and climatological parameters to flow characteristics. In this study, a new method is used which is based on the station-year technique and combined records for seve...

اسلامیان, سیدسعید, چاوشی بروجنی, ستار ,

Designers of hydraulic structures are often faced with the problem of estimating flood frequencies at stream sites, where little or no flow information is available. A regional regression model is widely used which relates physical and climatological parameters to flow characteristics. In this study, a new method is used which is based on the station-year technique and combined records for seve...

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