点击切换搜索课件文库搜索结果(990)
文档格式:PDF 文档大小:296.38KB 文档页数:26
EXPLANATORY NOTES GENERAL lia, Canada, Japan, New Zealand and the United States, thestem Country/area nomenclature and regional groups used in the volume for all living trees has been used for the volume figure Some variation as to the minimum diameter applied is reported The country/area names and order used in these tables follow in ECE/FAO (2000) standard UN practice regarding
文档格式:PPT 文档大小:1.81MB 文档页数:38
The medicinal use of plants has been discovered more than 2000 years ago. Greek physician Dioscorides described the use of opium, in which morphine is the main component. In 1806, morphine was isolated from opium. In 1820, quinine was isolated from the bark of the cinchona tree
文档格式:PPT 文档大小:1.29MB 文档页数:54
Epidemiology of CHD Prevalence CHD occurs in 0.5-0.8% of live births; The incidence is higher among stillborns 死产(3-4%), abortuses流产(10-25%),and premature infants (about 2% excluding PDA); About 2-3 in 1,000 newborn infants will be symptomatic with heart disease in the first year of life
文档格式:PPT 文档大小:742KB 文档页数:42
Purulent Meningitis Acute infection of central nervous system(CNS). 90% of cases occur in the age of 1 mo-5yr. The inflammation of meninges caused by various bacteria. Common features in clinical practices include: fever, increased intracranial pressure, meningeal irritation
文档格式:PDF 文档大小:11.76MB 文档页数:31
2.1 Weak Interactions in Aqueous Systems 47 and titration curves, and consider how aqueous solu 2.2 lonization of Water. Weak Acids, and tions of weak acids or bases and their salts act as buffers Weak Bases 60 against pH changes in biological systems. The water 2.3 Buffering against pH Changes in Biological
文档格式:PDF 文档大小:294.58KB 文档页数:14
PART II SELECTED CURRENT ISSUES IN THE FOREST SECTOR Forests and poverty alleviation his chapter focuses on the role of forests, chapter specifies two types of poverty alleviation particularly natural ones, in poverty associated with forest resources, as seen at the
文档格式:PDF 文档大小:68.24KB 文档页数:2
I Let L= 1.25 H in Fig. 6-11, and determine v(t)if v(0) 1(02)=20A L 0.05F ig 6-11 For prob. I 2(a)What value of L in the circuit of Fig 6-11 will result in a transient response of the form, v(t)
文档格式:PPT 文档大小:18.5KB 文档页数:1
In the chapter we shall present an introduction to nonlinear circuit analysis and shall examine a few interesting examples of that are used in practice. The principle of analysis will be emphasized. Graphical solution techniques will be given first. In addition, the basic concept of the phase plane shall be considered
文档格式:PPT 文档大小:16.5KB 文档页数:1
In the chapter we first shall consider the nodal analysis and introduce the networks containing dependent sources. In addition later in the chapter we shall consider state(状态)- variable analysis
文档格式:PPT 文档大小:18.5KB 文档页数:1
In this chapter we will extend the concepts which have been presented in the preceding chapter so as to develop general methods of phasor analysis for circuits which are under conditions of sinusoidal steady-state excitation. The methods are very similar to those for resistance circuits which were presented in Chap.2
首页上页4546474849505152下页末页
热门关键字
搜索一下,找到相关课件或文库资源 990 个  
©2008-现在 cucdc.com 高等教育资讯网 版权所有