- 行业: Printing & publishing
- Number of terms: 178089
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- Company Profile:
McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
A cylindrical or spherical shell structure capable of withstanding internal pressure and external loadings at nozzles, supports, and attachments. The pressure vessel is designed with consideration for all possible modes of failures (such as fatigue, fracture, or collapse) and with provision of rational margins of safety against each type of failure. The Boiler and Pressure Vessel Code has been developed by the American Society of Mechanical Engineers (ASME), and the Code has been widely accepted as a standard for designing pressure vessels.
Industry:Science
A dark-brown or black residuum produced by the partial decomposition and disintegration of mosses, sedges, trees, and other plants that grow in marshes and other wet places. Forest-type peat, when buried and subjected to geological influences of pressure and heat, is the natural forerunner of most coal.
Industry:Science
A dark-colored, aphanitic (very finely crystalline) rock of volcanic origin, composed essentially of nepheline (a feldspathoid) and pyroxene.
Industry:Science
A death that is self-inflicted and carried out with intent to die; also, one who completes such an act. Suicide is a serious epidemiological public health problem that devastates individuals, families, and communities throughout the world. There are many risk factors for suicide and suicidal behaviors, as well as a variety of methods of suicide. Our understanding of both the methods and risk factors involved can help inform models for suicide prevention.
Industry:Science
A deciduous fruit tree species (<i>Prunus persica</i>) that originated and was first cultivated in western China. It is adapted to relatively moderate climates in the temperate zone. Although most peach cultivars require a substantial amount of winter chilling (temperatures between 32 and 45°F, or 0–7°C) to ensure adequate breaking of winter dormancy and uniform budbreak, peach wood is susceptible to winter injury at temperatures below −15°F (−25°C) and dormant fruit buds are injured by temperatures below 0°F (−18°C). Consequently, commercial cultivation is limited to lower latitudes in the temperate zone or to higher latitudes where large bodies of water have a moderating influence on climate. The principal peach-growing regions in North America, ranked in order of commercial production, are central California, Georgia and the Carolinas, the mid-Atlantic region, the Great Lakes region, and the Pacific northwestern region. Other important peach-growing regions in the world include Italy, southern France, Spain, Japan, China, Argentina, southern Brazil, Chile, South Africa, and southeastern Australia.
Industry:Science
A deciduous fruit tree species, <i>Diospyros kaki</i>. Persimmons originated in the subtropical regions of China but were cultivated more extensively in Japan where, until 1900, it was the most important fruit. Now, although it is only the fifth most important crop there, Japan leads in world production. Persimmons have been introduced to a number of temperate zone countries; however, they have not attained substantial popularity, and only small commercial plantings exist in the United States (primarily in California), Italy, Brazil, and Israel.
Industry:Science
A deciduous tree and shrub of the genus <i>Salix</i>, order Salicales, common along streams and in wet places in the United States, Europe, and China. The twigs are often yellow-green and bear alternate leaves which are characteristically long, narrow, and pointed, usually with fine teeth along the margins (see <b>illus.</b>). Flowers occur in catkins; the staminate consist of one to twelve (usually two) stamens, with one or two nectar glands; the pistillate have a single ovary of two carpels, with one to four small glands. The fruit contains several silky seeds. The species are wind- or insect-pollinated and hybridize freely, which often makes identification difficult.
Industry:Science
A deciduous tree of the genus <i>Betula</i> which is distributed over much of North America, in Asia south to the Himalaya, and in Europe. About 40 species are known. The birches comprise the family Betulaceae in the order Fagales. The sweet birch, <i>B. lenta</i> (<b>illus.</b><i> a</i>), the yellow birch, <i>B. alleghaniensis</i> (illus.<i>b</i>), and the paper birch, <i>B. papyrifera</i>, are all important timber trees of the eastern United States. The yellow and the paper species extend into Canada. The gray birch, <i>B. populifolia</i>, is a smaller tree of the extreme northeastern United States and adjacent Canada. Both sweet (black) and yellow birches can be recognized by the wintergreen taste of the bark of the young twigs. A flavoring similar to oil of wintergreen is obtained from the bark of the sweet birch. The paper and gray birches can be easily identified by their white bark. The bark of the paper birch peels off in thin papery sheets, a characteristic not true of the gray birch. The river birch, <i>B. nigra</i>, is a less common tree of wet soils and banks of streams and is important as an ornamental and for erosion control. The hard, strong wood of the yellow and the sweet birches is used for furniture, boxes, baskets, crates, and woodenware. The European birches, <i>B. pubescens</i> and <i>B. pendula</i>, are the counterparts of the paper and gray birches in the United States. European birches are also cultivated in America.
Industry:Science
A deciduous tree, <i>Oxydendrum arboreum</i>, of the heath family, indigenous to the southeastern section of the United States, and found from Pennsylvania to Florida and west to Indiana and Louisiana. Sourwood is hardy and often cultivated in the north. It is usually a small or medium-sized tree, but it sometimes attains a height of 75 ft (23 m) and a diameter of nearly 2 ft (0.6 m). The leaves are simple, finely toothed, long-pointed, and 4–8 in. (10–20 cm) long, and have an acid taste which explains the popular name. They turn scarlet in the fall. The flowers are white and urn-shaped and grow in long clusters (see <b>illus.</b>). The dry fruit remains on the tree through the fall and winter. The wood is not used commercially. Sourwood is also known as sorrel tree, and it is widely planted as an ornamental.
Industry:Science
A decision-making function that plays an important role in most manufacturing and service industries. Scheduling is applied in procurement and production, in transportation and distribution, and in information processing and communication. A scheduling function typically uses mathematical optimization techniques or heuristic methods to allocate limited resources to the processing of tasks.
Industry:Science
