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Wladyslaw Mielczarski Antoni M. Zajaczkowski 《Optimal control applications & methods.》1994,15(1):49-65
The problem of multivariable controller synthesis for a turbogenerator is considered. Using the feedback linearization approach for multi-input non-linear systems, the existence of a linearizing state feedback for the improved reduced-order model of a turbogenerator is proved and the simplest form of this feedback is derived. Application of the obtained non-linear controller to the multivariable control of a turbogenerator provides very good results not only for the reduced-order model but also for the ‘exact’ (Park's) model of a turbogenerator. Simulations of fault and post-fault conditions in the obtained nonlinear control system confirm its superiority over a system with a voltage regulator and power system stabilizer. 相似文献
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伸直位整复纸夹板外固定治疗第5掌骨颈骨折 总被引:1,自引:0,他引:1
自1998至2006年,采用我院传统的伸直位手法整复,纸夹板结合厚棉压垫、厚棉衬垫外固定治疗第5掌骨颈骨折30例,疗效满意,现总结报告如下。 相似文献
16.
手牵膝顶法治疗肩关节前脱位 总被引:1,自引:1,他引:0
外伤性肩关节前脱位临床上较为多见,复位方法亦很多。自2000年3月,在传统手法整复基础上,采用手牵膝顶法治疗肩关节前脱位47例,效果满意,报告如下。临床资料本组47例,男31例,女16例;年龄21~68岁,平均35岁;跌伤25例,殴伤12例,投掷伤6例,车祸伤4例。就诊时间伤后30min-5d;左侧20例,右侧27例;喙突下脱位25例,盂下脱位17例,锁骨下脱位5例, 相似文献
17.
手法复位石膏外固定治疗Barton骨折 总被引:2,自引:0,他引:2
Barton骨折是桡骨远端背侧、掌侧缘骨折,合并腕的半脱位,是一种较少见的关节内骨折。自1998年以来对21例Barton骨折患者采用闭合手法整复、石膏夹板外固定治疗,经随访观察,疗效满意。 相似文献
18.
Y. Ikemoto S. Demura S. Yamaji M. Minami M. Nakada M. Uchiyama 《Sport Sciences for Health》2007,2(2):64-70
Although explosive isometric contraction provides little work toward the outside, force-time parameters of the rising phase
of the force-time curve may be able to predict muscle power. The purpose of this study was to examine the relationship between
muscle power with work (power grip) and force-time parameters during the rising phase in explosive isometric grip. Fifteen
healthy young adult males participated in this study. Power grip was measured using loads of 20%–50% of maximal voluntary
contraction (MVC) (peak isometric force). Subjects pulled explosively on a grip bar held with the second digital joints without
the thumb. Peak power was calculated from peak velocity and load. Explosive isometric grip was measured using a hand dynamometer.
Time-series data of both tests were sampled by an analog-to-digital interface. Both tests were performed with the subjects
seated with a sagittal and horizontal position of the arm supported by an armrest. Peak power in the power grip test tended
to be larger with an increase of the load, but there was no significant difference between 40% and 50% MVC. Only the peak
power in 50% MVC significantly correlated with peak grip force (r=0.52, p<0.05). The force-time parameters related to the peak rate of the rising force phase in explosive isometric grip significantly
correlated with the peak powers (30%–50% MVC, r=|0.58−0.78|). Peak rate of the rising force phase in explosive isometric grip
may be useful for predicting muscle power with loads between 30%–50% MVC. 相似文献
19.
在实验设计时应保证一定的检验效能;当统计检验结果是阴性时,应估计其检验效能。本文探讨了完全随机设计的方差分析中检验效能的估计方法。结果表明,检验效能与样本含量的大小及样本均数间的差别有关。同时,用医学实例说明其应用。 相似文献
20.
Decisions on Inclusion in the Swedish Basic Health Care Package—Roles of Cost-Effectiveness and Need 总被引:2,自引:0,他引:2
Lars Bernfort 《Health care analysis》2003,11(4):301-308
BACKGROUND: Inclusion or not of a treatment strategy in the publicly financed health care is really a matter of prioritisation. In Sweden priority setting decisions are governed by law in which it is stated that decisions should be guided by firstly the principle of need and secondly the principle of cost-effectiveness. OBJECTIVE: The purpose of the paper is to discuss and illustrate the roles of need and cost-effectiveness in decisions on inclusion or not of treatment strategies in the publicly financed health care. METHODS: The theoretical backgrounds of need and cost-effectiveness are discussed in short, both with respect to their meaning and to their potential roles in decisions on priority setting. Four treatment strategies, Viagra, Rivastigmine, statins, and lung transplants, are analysed with respect to whether either cost-effectiveness or need, or both, seem to have played a role in the decisions of inclusion or not in the basic health care package. RESULTS: Both need and cost-effectiveness are important and should be important aspects when making decisions on priority setting. From the examples of the four treatment strategies it seems that decisions are almost exclusively made with reference to the principle of need. CONCLUSIONS: The most evident conclusion to be drawn from this study is that decisions on priority setting are almost solely based on the principle of need. This implies that the principle of cost-effectiveness is given very little space, which is a problem as this means an obvious risk of inefficient resource use. 相似文献