Xem 1-20 trên 493 kết quả Mechanical specifications
  • n view of the growing importance of product liability and the demand for fulfillment of extreme specifications for new products, this book provides the basic tools for establishing model equations in structural mechanics. Additionally, it illustrates the transition and interrelation between structural mechanics and structural optimization. Nowadays, this new direction is extremely important for more efficiency in the design process. The book is divided into four parts covering the fundamentals of elasticity, plane and curved load-bearing structures and structural optimization.

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  • This book provides information on the stages of machinery design for automated manufacturing and offers a step-by-step process for making it optimal. This is illustrated by numerous examples of technical concepts taken from different manufacturing domains.

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  • Microwaves are generally considered to be a specific part of the wide radio frequency spectrum. The band from 300 MHz to 30 GHz is typically considered to be “microwaves,” for example by the Institute of Electrical end Electronics Engineers (IEEE), although many of us prefer to set the lower limit somewhat higher—perhaps at 1 or even 3 GHz. Above 30 GHz, the term “millimeter waves” is used. High school physics suggests that we are talking about wavelengths ranging from about 30 cm down to 10 mm...

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  • This British Standard has been prepared under the authority of the General Mechanical Engineering Standards Policy Committee to provide a metric series standard for holding down bolts. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.

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  • For thirty years or more the expressions “Correlation of the Physical Forces” and “The Conservation of Energy” have been common, yet few persons have taken the necessary pains to think out clearly what mechanical changes take place when one form of energy is transformed into another. Since Tyndall gave us his book called Heat as a Mode of Motion neither lecturers nor text-books have attempted to explain how all phenomena are the necessary outcome of the various forms of motion.

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  • Invasion Many diseases are caused primarily by pathogens growing in tissue sites that are normally sterile. Pneumococcal pneumonia is mostly attributable to the growth of S. pneumoniae in the lung and the attendant host inflammatory response, although specific factors that enhance this process (e.g., pneumolysin) may be responsible for some of the pathogenic potential of the pneumococcus. Disease that follows bacteremia and invasion of the meninges by meningitisproducing bacteria such as N. meningitidis, H. influenzae, E.

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  • There are a few terms specific to mobile robots that must be defined to avoid confusion. First, the term robot itself has unfortunately come to have at least three different meanings. In this book, the word robot means an autonomous or semi-autonomous mobile land vehicle that may or may not have a manipulator or other device for affecting its environ- ment. Colin Angle, CEO of iRobot Corp. defines a robot as a mobile thing with sensors that looks at those sensors and decides on its own what actions to take....

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  • For thirty years or more the expressions “Correlation of the Physical Forces” and “The Conservation of Energy” have been common, yet few persons have taken the necessary pains to think out clearly what mechanical changes take place when one form of energy is transformed into another. Since Tyndall gave us his book called Heat as a Mode of Motion neither lecturers nor text-books have attempted to explain how all phenomena are the necessary outcome of the various forms of motion.

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  • The RP process begins when the object is drawn on the screen of a CAD workstation or personal computer to provide the digital data base. Then, in a post-design data processing step, computer software slices the object mathematically into a finite number of horizontal layers in generating an STL (Solid Transfer Language) file. The thickness of the “slices” can range from 0.0025 to 0.5 in. (0.06 to 13 mm) depending on the RP process selected. The STL file is then converted to a file that is compati- ble with the specific 3D “printer” or processor that will construct the model.

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  • (BQ) Ebook ISO metric black hexagon bolts, screws and nuts — Specification gives the general dimensions and tolerances of black hexagon bolts, screws and nuts with ISO metric threads, in diameters from 5 mm to 68 mm inclusive. Mechanical properties are included for steel bolts, screws and ordinary plain nuts, which may be produced by hot or cold forging at the option of the manufacturer.

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  • Problems of nonholonomic mechanics, including many problems in robotics, wheeled vehicular dynamics and motion generation, have attracted considerable attention. These problems are intimately connected with important engineering issues such as path planning, dynamic stability, and control.Thus, the investigation of many basic issues, and in particular, the role of symmetry in such problems, remains an important subject today.

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  • Physics is as well as basic science because the physical laws governing all other natural sciences. This means that the natural sciences as biology, chemistry, geography ... study only specific parts of nature and must comply with the laws of physics. For example, the chemistry of these substances are governed by the physical laws of quantum mechanics, thermodynamics and electromagnetism.

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  • A major challenge in clinical periodontics is to find a reliable molecular marker of periodontal support loss with high sensitivity, specificity and utility (Buduneli & Kinane 2011). Molecules derived from inflamed host tissue and pathogenic bacteria have the potential of being used as markers of periodontitis; however, molecular markers of bone resorption have advantages as they relate to specificity for bone, easy detection, pre-analytic stability and availability of sensitive and specific assays for detection (Forde et al. 2006).

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  • Whether the phrase is used mechanically, as part of the daily ritual, whether it is used ironically, sadly or even cruelly is not specified. On a stage, the actor and director would come to a decision about how to interpret the phrase based on their concept of characterization and of the overall meaning and structure of the play.

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  • Generative Shape Design (GSD) helps to design advanced shapes based on a combination of wireframe and extensive multiple surface features, with full specification capture. CATIA - Generative Shape Design (GSD) includes all the functions and commands from the CATIA - Generative Shape Design 1 (GS1) product. It provides an extensive set of tools for creating and modifying mechanical surfaces used in the design of complex shapes or hybrid parts. Its feature-based approach offers a productive and intuitive design environment to capture and reuse design methodologies and specifications....

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  • Recently, the use of oral fluids such as GCF, whole saliva and oral rinse as a means of evaluating host-derived products, as well as exogenous components (for instance: oral microorganisms and microbial products), has been suggested as potential sources and diagnostic markers, respectively for disease susceptibility (Sahingur and Cohen 2004; Buduneli and Kinane 2011).

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  • The material presented herein has been prepared for the general information of the reader and should not be used or relied upon for specific applications without first securing competent technical advice. Nor should it be used as a replacement for current complete engineering codes and standards. In fact, it is highly recommended that the appropriate current engineering codes and standards be reviewed in detail prior to any decision making.

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  • This section presents and discusses the properties of structural steels that are of importance in design and construction. Designers should be familiar with these properties so that they can select the most economical combination of suitable steels for each application and use the materials efficiently and safely. In accordance with contemporary practice, the steels described in this section are given the names of the corresponding specifications of ASTM, 100 Barr Harbor Dr., West Conshohocken, PA, 19428.

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  • operates globally as a leading supplier of compressors and automated solutions to the refrigeration and air conditioning industry. The Danfoss product range is among the most complete in the world. It is used within a number of business areas, such as household-, commercial-, food retail and industrial refrigeration as well as air conditioning, products for the wholesale refrigeration market and automation in various specific industrial sectors.

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  • This is the smallest unit of the machine and complete, its characteristics can not be separated out and meet all technical requirements. (For example, gears, shafts bike). Can put all the machine parts into two groups: - Detailed machine for general use (for example, bolts, gears; axis) is the machine parts used in many different machines. Details specific use machines have been used only in a certain number. (eg, crankshaft, valves, cam ...)

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