- 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 statistical description of quantum-mechanical systems in which there is no restriction on the way in which particles can be distributed over the individual energy levels. This description applies when the system has a symmetric wave function. This in turn has to be the case when the particles described are of integer spin.
Industry:Science
The system in an automotive vehicle that furnishes the electrical energy to crank the engine for starting, recharge the battery after cranking, create the high-voltage sparks to fire the compressed air-fuel charges, and power the various lights, motors, controllers and control systems, and other signaling and accessory systems.
Industry:Science
The process by which specialized and diversified structures arise during development of the embryo. The process involves (1) an increase in the number of cell types, and (2) an increase in morphological heterogeneity through the arrangement of cells into increasingly complex structural patterns in the form of tissues and organs.
Industry:Science
The protrusion of an organ, part of an organ, or other structure through the wall of the body cavity normally containing it. Various organs may be involved, including the bladder, brain, esophagus, intestine, ovary, and rectum. The most common location for a hernial bulge to appear is the abdominal wall, particularly the groin.
Industry:Science
The making of drawings of objects, structures, or systems that have been visualized by engineers, scientists, or others. Such drawings may be executed in the following ways: manually with drawing instruments and other aids such as templates and appliqués, freehand with pencil on paper, or with automated devices, described below.
Industry:Science
The ratio of the average mass per atom of the natural nuclidic composition of an element to 1/√<span style="border-top:1px solid black;">12</span> of the mass of an atom of nuclide <sup>12</sup>C. For example, μ(Cl) = 35.453. Relative atomic mass replaces the concept of atomic weight. It is also known as relative nuclidic mass.
Industry:Science
The systematically organized body of general concepts and principles underlying the design, analysis, and application of instruments and instrument systems. Instruments are devices for the acquisition and processing of information acquired from the physical world. They embrace, in particular, measuring and observation instruments.
Industry:Science
The motion of a body traveling from space through the atmosphere surrounding a planet. Entry bodies can be natural bodies, such as meteors or comets, or vehicles, such as ballistic missiles or the space shuttle orbiter. Entry begins when the body reaches the sensible atmosphere (defined as 400,000 ft or 122 km altitude for Earth).
Industry:Science
The power transmitted or the contact force per unit length of a gear. If gear speed, size, and tooth contour are fixed, the power-handling capacity may be increased by increasing the axial length of the gear. However, where space is restricted (as in aircraft and many ground vehicles), the gear is usually loaded to its safe limit.
Industry:Science
The result, proved by K. Gödel in 1931, that any sufficiently advanced mathematical system must be incomplete in that there must always be a true sentence that is not provable in the system. Roughly speaking, Gödel showed how, for each such system, a sentence could be constructed that asserted its own nonprovability in the system.
Industry:Science
