Bidirectional

Modem board and interface SW a bidirectional modem is used to connect the host system, located in the plant, with a remote PC. It is asynchronous, with a throughput of 28000 b/s. The remote PC must match the characteristics of the in-plant PC of the AEBIL system. 

Modem a bidirectional modem connection (asynchronous, 28000 b/s) between the PC of the on-site AEBIL system and a laboratory PC has enabled transfer of data files and monitor presentations from the peripheral station to the central one, strongly enhancing initial assistance in data interpretation at drastically reduced costs. 

Fig. 1 shows the block diagram of the vibrometer, in which the most sensible to small phase variations interferometric scheme is employed. It consists of the microwave and the display units. The display unit consists of the power supply 1, controller 2 of the phase modulator 3, microprocessor unit 9 and low-frequency amplifier 10. The microwave unit contains the electromechanical phase modulator 3, a solid-state microwave oscillator 4, an attenuator 5, a bidirectional coupler 6, a horn antenna 7 and a microwave detector 11. The horn antenna is used for transmitting the microwave and receiving the reflected signal, which is mixed with the reference signal in the bidirectional coupler. In the reference channel the electromechanical phase modulator is used to provide automatic calibration of the instrument. To adjust the antenna beam to the object under test, the microwave unit is placed on the platform which can be shifted in vertical and horizontal planes. 

A three-state controller is used to drive either a pair of independent on/off actuators such as heating and cooling valves, or a bidirectional motorized actuator. The controller is actually two on/off controllers, each with deadband, separated by a dead zone. When the controlled variable lies within the dead zone, neither output is energized. This controller can drive a motorized valve to the point where the manipulated variable matches the load, thereby avoiding cychng. 

Bidirectional transmission. Configuration parameters such as span, engineering units, resolution, and so on, must be communicated to the smart transmitter. 

Taper land Bidirectional Moderate Poor Poor Compact... 

Tilting pad Bidirectional Unidirectional Good Good Good Greater... 

Usually includes 12 digits and allows bidirectional scanning. 

The Interleaved 2-of-5 bar code is a bidirectional, continuous, selfchecking numeric bar code. It uses a series of wide and narrow bars or spaces to represent each character, and each symbol employs unique Start and Stop elements. 

The 3 of 9 bar code is a variable-length, bidirectional, discrete, selfchecking, alphanumeric bar code. Its data character set contains 43 characters 0-9, A—Z, -,., , /, -i-, %, and space. Three of the nine elements are wide and six are narrow. A common character ( ) is used exclusively for both a Start and Stop character. The Start/Stop characters must be included in every bar code. It s the Start/Stop pattern that allows symbols to be scanned bidirectionally. 

Identify the at-risk equipment and the potential ignition sources in the piping system to determine where arresters should be placed and what general type (deflagration or detonation, unidirectional or bidirectional) are needed. 

Unlike an SCR, which is unidirectional, a triac is a bidirectional thyristor switch and conducts in both directions. It can be considered as composed of two SCRs, connected back to back with a single gate, as shown in Figure 6.22(a). Since the thyristor now conducts in both directions there is no positive (anode) or negative (cathode) terminals. 

As a sialic switch I ype of switch Unidireclioiial Bi-dircciional Controllable Uncontrollable Type of switch Unidirectional Bidirectional C onlrollablc Unconirollahlc... 

Not possible. Although coupling is bidirectional, it can be run in any one direction only... 

TAPER LAND BIDIRECTIONAL MODERATE POOR POOR COMPACT... 

TILTING MD BIDIRECTIONAL 3 UNIDIRECTIONAL GO 00 GOOD GOOD GREATER... 

Structure-goal strategies—directed at the structure of a potential intermediate or potential starting material. Such a goal greatly narrows a retrosynthetic search and allows the application of bidirectional search techniques. 

The direct goal of stereochemical strategies is the reduction of stereochemical complexity by the retrosynthetic elimination of the stereocenters in a target molecule. The greater the number and density of stereocenters in a TGT, the more influential such strategies will be. The selective removal of stereocenters depends on the availability of stereosimplifying transforms, the establishment of the required retrons (complete with defined stereocenter relationships), and the presence of a favorable spatial environment in the precursor generated by application of such a transform. The last factor, which is of crucial importance to stereoselectivity, mandates a bidirectional approach to stereosimplification which takes into account not only the TGT but also the retrosynthetic precursor, or reaction substrate. Thus both retrosynthetic and synthetic analyses are considered in the discussion which follows. 

In such openings, bidirectional flow driven by temperature differences between the two rooms can occur. If a total pressure (static pressure plus dynamic pressure) is specified, this phenomenon can be accounted for. For higher accuracy in the neighborhood of this opening, it is, however, recommended to expand the calculation domain beyond this opening. 

Derive expressions for o, Oy, and In Etjuation (4.103) as a furKHon of a, a, and e. Verify that vanishes for Isovopic materials. What Is for a bidirectional woven lamina with equal numbers of fibers In each directions ... 

N. J. Pagano, Exact Solutions for Rectangular Bidirectional Composites and Sandwich Plates, Journal of Composite Materials, January 1970, pp. 20-34. 

N. J. Pagano and Sharon J. Hatfield, Elastic Behavior of Multilayered Bidirectional Composites, AIAA Journal, July 1972, pp. 931-933. 

Expanded metal cartridge flame arresters are available for deflagration and detonation applications and are designed for bidirectional flow. 

The flame propagation direction affects the type of flame arrester selected. An end-of-line or in-line deflagration flame arrester used for the protection of an individual tank may be of a unidirectional design because the flame will only propagate from the atmosphere towards the tank interior. A bidirectional flame arrester design, however, is needed for an in-line application in a vapor recovery (vent manifold) system because the vapors must be able to flow from the tank interior into the manifold, or from the manifold into the tank interior. Consequently, flame may propagate in either direction. 

The ranges of mixture composition pins operating temperature and pressure are important. Unless a detonation flame arrester is used, it is essential to ensure that DDT will not occur after a flame enters the system. Even if a detonation flame arrester is used, it is important to use the correct type of arrester for the service. For example, if it is possible for a flame to approach from either direction, a bidirectional flame arrester must be selected. 

The detonation flame arrester can be either bidirectional or nnidi-rectional. This is one of the main differences between the USCG and UL standards. However, as of April 2000 UL has only listed (approved) bidirectional flame arresters. 

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