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In this article we introduce digital control and contrast it with analog control. Traditionally, control systems have been designed using analog techniques. But today, because of the explosive growth of digital technology, controllers are typically implemented as programmable digital hardware or as programs on digital computers. The concepts and techniques for analysis and design of digital controllers are the central concerns of this article. In this part we introduce discrete-time signals and provide examples. We also describe discrete-time systems in terms of difference equations and look at their solutions via transform methods. 相似文献
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In this part we analyze the discrete-time systems and suggest some intuitive design procedures. We survey the state-of-the-art
digital control systems. 相似文献
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Lisa G. Colarossi Randa Dean Kavitha Balakumar Alexandra Stevens 《American journal of sexuality education》2017,12(1):1-19
We present an organizational capacity building program that is a systemic approach to training professionals, creating organizational policies and practices, and enhancing the physical environment with materials about sexual and reproductive health. The evaluation of four different organizations showed increases over six months in: staff reports of administrative support for providing materials and referrals to clients, as well as having sexual health conversations with clients; positive staff attitudes about, and preparedness for, providing sexual health information; and knowledge about sexual health. All were sustained at twelve months. Environmental enhancement with educational materials and condom distribution also increased. 相似文献
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Ananth N. Rao Rajesh B. Iyer J. Kavitha Minakshi Koch Kumar V. Suresh 《Indian journal of clinical biochemistry : IJCB》2008,23(4):407-409
Defects in biotin metabolism are mainly associated with either the enzyme Biotinidase or Holocarboxylase synthetase. Defects
in either enzymes depletes biotin utilization by the cells. Holocarboxylase synthetase deficiency is an inherited disorder
in which the body is unable to use the vitamin biotin effectively. This condition is inherited in an autosomal recessive pattern.
We present a case of a 9 year old girl with atypical symptomology as a case holocarboxylase synthetase deficiency, who demonstrated
an increased excretion of propionic and methyl malonic acids, with her biotinidase activity being normal. She demonstrated
remarkable improvement on biotin supplementation. 相似文献
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Ananth N. Rao J. Kavitha Minakshi Koch V. Suresh Kumar 《Indian journal of clinical biochemistry : IJCB》2009,24(3):215-222
Inherited metabolic disorders are a heterogeneous group of genetic conditions mostly occurring in childhood. They are individually
rare but collectively numerous, causing substantial morbidity and mortality. We have retrospectively reviewed a total of eight
hundred and sixty nine cases with different age groups that had been referred from several diagnostic centers and hospitals
of India to the Department of Metabolism in Narayana Hrudayalaya, as cases suspected with inborn errors of metabolism. Advanced
techniques applied were to diagnose the disorders of inborn errors of metabolism. Data analyzed indicates occurrence of several
metabolic disorders in our population. The need to screen for an inborn error of metabolism arises out of the fact that most
cases take to irreversible effects as time progress. Emphasis has to be laid on early detection and prompt management, which
could help in alleviating symptoms and preventing complications and consequent incapacitation. 相似文献
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