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93篇 您的检索式：作者名="Steyn W"

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	题名	作者	年代	出处	被引量
1	低轨道航天器姿态跟踪机动控制研究显示文摘某些低轨道航天器在执行任务时 ,需要通过姿态控制系统使其有效载荷 (如星载相机 )在一段时间里连续指向地面或空间的给定目标。文中研究了带 3个反作用飞轮的低轨道航天器的姿态跟踪开展问题。首先根据刚体运动学知识推导出航天器的参考姿态角、参考角速度和参考角加速度表达式 ,然后基于卫星航天器姿态动力学给出了 3个互相垂直安装的反作用飞轮的控制律 ,并利用 L yapunov稳定性理论证明了闭环系统的渐近稳定性。	李俊峰徐敏 Steyn W H	2001	清华大学学报(自然科学版)2001，41，2：	15
2	Diurnal blood pressure variation in the evaluation of early onset severe preeclampsia显示文摘	STEYN D W ODENDAAL H J HALL D R	2008	Eur J Obstet Gynecol Reprod Biol2008，138，2：	1
3	Attitude control systems for agile atatellites using control moment gyros 显示文摘	LAPPAS V J STEYN W H UNDERWOOD C I	2002	Acta Astronautica2002，51，1：	1
4	Anthocyanins in vegetative tissues: a proposed unified function in photoprotectlon显示文摘	STEYN W J WAND S J E HOLCROFT D M	2002	New Phytologist2002，155，3：	1
5	Anthocyanins in vegetative tissues:a proposed unified function in photoprotection显示文摘	Steyn W J Wand S J E Holcroft D W	2002	New Phytologist2002，155，：	1
6	Kalman filter configurations for alow-cost loosely integrated inertial navigation system onan airship显示文摘	Bijker J Steyn W	2008	Control Engineering Practice2008，16，：	1
7	Fertilization and rejection of spermatozoids by egg cells in artificially pollinated ovules of En-cephalartos(Zamiaccae)显示文摘	STEYN E M STRYDOM W F BOTHA A	1996	Sexual Plant Reproduction1996，9，3：	1
8	Umbilical cord blood gas analysis:a comparison of two simple methods of sample storage显示文摘	Owen P Farrell TA Steyn W	1995	Early Human Development1995，42，1：	1
9	Randomised controlled trial of ketanserin and aspirin in prevention of pre-eclampsia显示文摘	Odendaal H J	1997	Lancet1997，350，：	1
10	Dihydralazine or ketanserin for severe hypertension in pregnancy? Pre-liminary results显示文摘	Odendaal H J	1997	Eur J Obstet Gynecol Rrprod Biol1997，75，：	1
11	The optimal dosage of ketanserin for patients with severe hypertension in pregnancy 显示文摘	VAN SCHIE D L DE JEU R M STEYN D W	2002	Eur J Obstet Gynecol Reprod Biol2002，102，：	1
12	Expectant management of early onset,severe pre-eclampsia:maternal outcome 显示文摘	HALL D R ODENDAAL H J STEYN D W	2000	Br J Obstet Gynecol2000，107，10：	1
13	Improve perinatal mortality rates in 1001 patients with severe preeclampsia 显示文摘	ODENDAAL H J STEYN D W NORMAN K	1995	S Afr Med J1995，85，10：	1
14	Melatonin in chronic renal failure 显示文摘	VILJOEN M STEYN M E VAN RENSBURG B W	1992	Nephron1992，60，2：	1
15	Anthocyanins in vegetative tissues:a proposed unified function in photoprotection显示文摘	Steyn W J Wand S J E Holcroft D M		0，，：	1
16	Anthocyaninsin vegetative tissues A proposed unified function in photo protection显示文摘	Steyn W J Wand S J E Holcroft D M	2002	New Phytologist2002，155，：	1
17	Cortical entropy changes with general anaesthesia: theory and experiment显示文摘	Sleigh J W Steyn R D A Steyn R M L	2004	Physiol Meas2004，25，4：	1
18	Regulation of pear color development in relation to activity of flavonoid enzymes显示文摘	Steyn W J Holcroft D M Wand S J E		0，，01：	1
19	Atti- tude control for small satellite using control moment gyros 显示文摘	LAPPAS V J STEYN W H UNDERWOOD C I	2002	Acta Astronautica2002，51，1：	1
20	Expectant management of early onset,severe pre-eclampsia:maternal outcome显示文摘	Hall D R Odendaal H J Steyn D W	2006	Obstetrical & Gynecological Survey2006，56，4：	1

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