- 行业: Printing & publishing
- Number of terms: 178089
- Number of blossaries: 0
- 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.
The power or thrust, the specific fuel consumption (mass of fuel consumed per hour per unit of delivered thrust or power), and any other important operating parameters of an aircraft engine, reported in graphical, tabular, or computerized format as a function of a thrust (or power) selection parameter, of ambient air pressure and temperature, of flight speed, and of other environmental, operational, and installation variables.
Industry:Science
The shaping and assembling of wood and wood products into finished articles such as mold patterns, furniture, window sashes and frames, and boats. The pronounced grain of wood requires modifications in the working techniques when cutting with the grain and when cutting across it. Five principal woodworking operations are sawing, planing, steam bending, gluing, and finishing. To shape round pieces, wood is worked on a lathe.
Industry:Science
The study of the universe as revealed by high-energy, invisible forms of light: x-rays and gamma rays. These radiations are produced in the cosmos when gas is heated to millions of degrees Kelvin or electrons have been accelerated to near the speed of light by violent and extreme conditions. Exploding stars, neutron stars, black holes, and galaxy clusters, the most massive objects in the universe, are among the objects studied.
Industry:Science
The modeling of manufacturing systems using audiovisual or other sensory features to simulate or design alternatives for an actual manufacturing environment, or the prototyping and manufacture of a proposed product using computers. The motivation for virtual manufacturing is to enhance people's ability to predict potential problems and inefficiencies in product functionality and manufacturability before real manufacturing occurs.
Industry:Science
The progress of humankind has been directly and indirectly dependent on materials. Periods of development in the archeological record, such as the Stone, Iron, and Bronze ages, reflect this. Since about 1970 there has been an unprecedented expansion in the number of new materials that have entered every aspect of human lives. The revolution in materials shows every sign of continuing, probably at an increased pace of development.
Industry:Science
The returning or throwing back of electromagnetic radiation such as light, ultraviolet rays, radio waves, or microwaves by a surface upon which the radiation is incident. In general, a reflecting surface is the boundary between two materials of different electromagnetic properties, such as the boundary between air and glass, air and water, or air and metal. Devices designed to reflect radiation are called reflectors or mirrors.
Industry:Science
The star α Ursae Minoris, also known as the North Star or Pole Star. It is perhaps the best-known star in the northern sky. Its location only 1° of arc from the north celestial pole, the point where the Earth's axis of rotation intersects the celestial sphere, has made it a very useful reference point for navigation. It may easily be found by following the line joining the two bright stars at the end of the bowl of the Big Dipper.
Industry:Science
The technique or practice involving manipulation of objects too small to be easily seen with the unaided eye. When a microscope is used to allow the operator to visually guide the microtools used in the manipulation, the technique is called micrurgy. When an object that is not extremely small needs to be positioned with extreme precision, as when aiming a laser to make a surgical lesion, the technique is called micropositioning.
Industry:Science
The machining of metals requires planning to decide which types of tools are to be used for a particular application. Conditions vary as to type of material, surface finish desired, and type of cut to be made. Much research is being done regarding the selection of strategies and approaches for establishing tool paths. Improvements in techniques, such as high-speed machining, provide more flexibility in planning machining operations.
Industry:Science
The study of phenomena that involve both thermodynamics and acoustics. A sound wave in a gas is usually regarded as consisting of coupled pressure and displacement oscillations, but temperature oscillations accompany the pressure oscillations. When there are spatial gradients in the oscillating temperature, oscillating heat flow also occurs. The combination of these four oscillations produces a rich variety of thermoacoustic effects.
Industry:Science
