Results 21 to 30 of about 488,632 (276)

Reduction of Cold-Start Emissions through Valve Timing in a GDI Engine [PDF]

, 2016
This work examines the effect of valve timing during cold crank-start and cold fast-idle (1200 rpm, 2 bar NIMEP) on the emissions of hydrocarbons (HC) and particulate mass and number (PM/PN). Four different cam-phaser configurations are studied in detail:
Cheng, Wai K., Rodriguez, Juan Felipe
core   +1 more source

Development and Laboratory Test of Normally Open High-TemperatureVent Valve for Offshore Thermal Recovery

Shiyou jixie, 2022
The vent valve for offshore thermal recovery cannot be opened or closed normally under high temperature and high pressure(HTHP)conditions due to the damage of hydraulic control pipeline.To solve this problem,a normally open high-temperature vent valve ...
Sun Yongtao, Hu Houmeng, Bai Jianhua, Sun Yubao, Ma Zenghua, Gu Qilin   +5 more
doaj  

Coding of details in very low bit-rate video systems [PDF]

, 1994
In this paper, the importance of including small image features at the initial levels of a progressive second generation video coding scheme is presented. It is shown that a number of meaningful small features called details should be coded, even at very
Casas Pla, Josep Ramon, Torres Urgell, Lluís   +1 more
core   +2 more sources

COGNITIVE DEVELOPMENT BASED ON THE VOLLEYBALL GAME PLAY IN PHYSICAL EDUCATION

International Journal of Physiotherapy, 2020
Background: The purpose of this study is to determine the effects of the Teaching Games for Understanding (TGfU), Sport Education Model (SEM), and Hybrid Teaching Games for Understanding Sport Education Model (HTGfU–SEM) on the cognitive performance ...
Norkhalid Salimin, Noraliza Minhat, Gunathevan Elumalai, Mohd Izwan Shahril, Guntur YSU   +4 more
doaj   +1 more source

Comparison of Langevin and Markov channel noise models for neuronal signal generation

, 2009
The stochastic opening and closing of voltage-gated ion channels produces noise in neurons. The effect of this noise on the neuronal performance has been modelled using either approximate or Langevin model, based on stochastic differential equations or ...
A. L. Hodgkin, B. Sengupta, C. P. Fall, C. W. Gardiner, E. M. Izhikevich, F. Rieke, G. Marsaglia, J. C. Roddey, J. E. McGeoch, J. E. Niven, J. S. Bendat, P. E. Kloeden, S. B. Laughlin, T. M. Cover, W. Gerstner, W. H. Press   +15 more
core   +1 more source

Shift factor-based SCOPF topology control MIP formulations with substation configurations [PDF]

, 2017
Topology control (TC) is an effective tool for managing congestion, contingency events, and overload control. The majority of TC research has focused on line and transformer switching. Substation reconfiguration is an additional TC action, which consists
Caramanis, Michael C., Goldis, Evgeniy A., Li, Xiaoguang, Philbrick, C. Russ, Rudkevich, Aleksandr M., Ruiz, Pablo A.   +5 more
core   +1 more source

Improved Mass Flow Rate Regulation Methods Based on Variable Frequency Control: A Case Study of Oxidizer Agent Weighing for Solid Propellants

Actuators, 2023
The feeding and weighing of oxidizer agents is the key process of solid rocket motor propellant preparation, and its accuracy directly affects the burning performance of solid rocket motors.
Han Lu, Hongyu Wang, Xuhang Chen, Xinlin Bai, Zhigang Xu, Yaqiang Wei, Linlin Fan   +6 more
doaj   +1 more source

Penawaran Saham Perdana: Pengalaman Di Bursa Efek Jakarta 1990 – 1998 [PDF]

, 2002
This study investigates initial and aftermarket performance of initial public offering (IPOs) for both short term and long term in the Jakarta Stock Exchange (JSE), from January 1990 to December 1998.
Rodoni, A. (Ahmad)
core  

The HIT Network for Children and Adolescents With CNS Tumors Facilitates Improvements of Diagnostic Assessments, Multimodal Treatments, Individual Counseling, and Research in Germany, Austria, and Switzerland

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background The HIT network was established in 2000 to create a population‐based structure aiming to improve survival rates and reduce late effects for children with central nervous system (CNS) tumors by conducting comprehensive clinical trials.
Stefan Rutkowski, Michael C. Frühwald, Gudrun Fleischhack, Stephan Tippelt, Pablo Hernáiz‐Driever, Olaf Witt, Astrid Gnekow, Christof Kramm, Matthias Eyrich, Johannes E. A. Wolf, Hermann Müller, Carsten Friedrich, Uwe R. Kordes, Denise Obrecht‐Sturm, Petra Ketteler, Barbara von Zezschwitz, Pascal Johann, Dominik Sturm, Karoline Nemes, Stefan Schönberger, Till Milde, Brigitte Bison, Monika Warmuth‐Metz, Torsten Pietsch, Ulrich Schüller, Arend Koch, David Capper, Martin Hasselblatt, Christian Thomas, Christian Hagel, Stefan M. Pfister, Felix Sahm, David T. W. Jones, Martin U. Schuhmann, Jürgen Krauss, Pedram Emami, Ahmed El Damaty, Rolf D. Kortmann, Rudolf Schwarz, Jürgen Debus, Mechthild Krause, Fabian Pohl, Holger Ottensmeier, Lisa Bußenius, Katja Baust, Andreas Faldum, Cecile Ronckers, Desiree Grabow, Martin Benesch, Thomas Perwein, Karin Dieckmann, Irene Slavc, Johannes Gojo, Nicolas U. Gerber, André O. von Bueren, Katrin Scheinemann, Gabriele Calaminus, Beate Timmermann, Ulrich‐Wilhelm Thomale, Martin Mynarek   +59 more
wiley   +1 more source

Arcless opening of direct current circuits in technical systems [PDF]

, 2017
Operation of the proposed DC circuit breaker consists in the fact that the closing of the thyristor in the DC power circuit with an inductive load results from opening the auxiliary circuit with a current value several fold less than the load current ...
Novikov, Sergey Avtonomovich, Pustynnikov, Sergey Vladimirovich, Zhidov, S. S.   +2 more
core   +1 more source