نتایج جستجو برای: optimum speed

تعداد نتایج: 270582  

Journal: :TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES 2018

2013
S S Kulkarni

Rapid developments are occurring in design of electrical machines and its control. To get optimum performance under normal/fault condition needs implementation of fault tolerance. Next decade is of Permanent Magnet Synchronous Machines. The paper presents mathematical modeling of PMSM. A current and speed controller is designed to implement fault tolerance and its stability analysis.

2003
Stefan Holzer Rainer Minixhofer Clemens Heitzinger Johannes Fellner Tibor Grasser Siegfried Selberherr

We present an approach for extracting thermal coefficients of higher order for different materials. Based on inverse modeling and using transient electrothermal simulations thermal investigations of complex layered polycrystalline silicon (Polysilicon) fuses are performed by a three dimensional interconnect simulator. This method is well suited to optimize different material compositions and ge...

1999
J. Madrenas A. Ivorra

Programming mechanisms in floating-gate non-volatile (EEPROM) standard-CMOS memories are briefly reviewed. A methodology to optimize the programming time in poly1-poly2 Fowler-Nordheim based structures is proposed. From design constraints, the optimum number of bumps and bootstrap capacitance value are obtained to maximize the programming speed for a given programming voltage.

2014
Yuki Kitagawa Keiji Kato Masahiro Fukui

This paper discusses the theory and experiments of heating and air cooling of battery modules. The heating mechanisms are shown first. Then, cooling of a single battery is examined. Optimum air flow speed is discussed. © 2014 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the Scientific Committee of IICST 2014.

2006
L. D. Coelho N. Hanik

High order modulation formats have been recently used to increase the capacity as well as the reach distance of high-speed optical transmission systems. This paper will review five modulations formats, compare their performance in a single-channel optical transmission scenario at 40Gbit/s using numerical simulations, and present the optimum transmission system parameters.

Journal: :journal of agricultural science and technology 2013
k. salari r. amiri chayjan j. khazaei j. amiri parian

kermanshah province is the main producer of various chickpea cultivars in iran. in this study a laboratory peg-tooth thresher was employed for chickpea threshing. the effect of cylinder speed (9, 12, 15 m/s), concave clearance (12, 14, 16 mm), feed rate (80, 160, 240 kg/h) and material moisture content (5, 10, 15% w.b.) was studied on percentage of grain damage, threshing efficiency and percent...

Journal: :SIAM J. Comput. 1996
Richa Agarwala David Fernández-Baca

We present a weighted version of Megiddo's multidimensional search technique and use it to obtain faster algorithms for certain convex optimization problems in R d , for xed d. This leads to speed-ups by a factor of log d n for applications such as solving the Lagrangian duals of matroidal knapsack problems and of constrained optimum subgraph problems on graphs of bounded tree-width.

2012
S. Saeid Hosseini Mohsen Shamsi

Optimum energy consumption and prevention of energy losses are important issues in various fields including agricultural engineering. Mower is one of the agricultural machineries that can waste too much energy if does not function properly. In this study, the performance of a single disc rotary mower was studied and optimized by measurement of cutting quality of the stem cross section (cutting ...

ژورنال: علوم آب و خاک 2008
صبوری, صمد , عسکری اصلی ارده, عزت‌اله , علیزاده, محمدرضا ,

A considerable portion of threshing losses and waste of rice takes place in threshing stage. One of the effective factors in threshing losses and waste of threshing units, threshers and harvesting machines, is the drum speed. In this research, effects of three factors including drum speed (five levels), crop moisture content (two levels) and rice common varieties (four varieties) on threshing l...

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