shunting

shunt

S0378900 (shŭnt)n.1. The act or process of turning aside or moving to an alternate course.2. A railroad switch.3. Electricity A low-resistance connection between two points in an electric circuit that forms an alternative path for a portion of the current. Also called bypass.4. Medicine A passage between two natural body channels, such as blood vessels, especially one created surgically to divert or permit flow from one pathway or region to another; a bypass.v. shunt·ed, shunt·ing, shunts v.tr.1. To turn or move aside or onto another course: shunting traffic around an accident.2. To evade by putting aside or ignoring: urgent problems that society can no longer shunt aside.3. To switch (a train or car) from one track to another.4. Electricity To provide or divert (current) by means of a shunt.5. Medicine To divert or permit flow of (a body fluid) from one pathway or region to another by surgical means.v.intr.1. To move or turn aside.2. Electricity To become diverted by means of a shunt. Used of a circuit.

[Middle English shunten, to flinch.]

shunt′er n.

shunting

(ˈʃʌntɪŋ) n (Railways) railways the act or job of manoeuvring coaches

Translations

smistamento

shunting

[′shənt·iŋ] (electricity) The act of connecting one device to the terminals of another so that the current is divided between the two devices in proportion to their respective admittances.

Shunting

The act of connecting an electrical element in parallel with (across) another element. The shunting connection is shown in illus. a.

An example of shunting involves a measuring instrument whose movement coil is designed to carry only a small current for a full-scale deflection of the meter. To protect this coil from an excessive current that would destroy it when measuring currents that exceed its rating, a shunt resistor carries the excess current.

Illustration b shows an ammeter (a current-measuring instrument) with internal resistance R_A. It is shunted by a resistor R_S. The current through the movement coil is a fraction of the measured current, and is given by the equation below. With different choices of R_S, the measuring range for the current I can be changed. See Ammeter, Current measurement

Similar connections and calculations are used in a shunt ohmmeter to measure electrical resistance. Shunt capacitors are often used for voltage correction in power transmission lines. A shunt capacitor may be used for the correction of the power factor of a load. In direct current shunt motors, the excitation (field) winding is connected in parallel with the armature. See Direct-current motor, Ohmmeter, Resistance measurement

In electronic applications, a shunt regulator is used to divert an excessive current around a particular circuit. In broadband electronic amplifiers, several techniques may be used to extend the bandwidth. For high-frequency extension, a shunt compensation is used where, typically, a capacitor is shunted across an appropriate part of the circuit. Shunt capacitors (or more complicated circuits) are often used to stabilize and prevent undesired oscillations in amplifier and feedback circuits. See Amplifier, Feedback circuit

shunting

The bypassing of alveoli by blood circulating through the lungs.

Aetiology
Atelectasis, portal hypertension, small airway obstruction, smoke inhalation injury.

Diagnosis
Hypoxaemia that only partially improves with high inspired O2 concentrations (e.g., arterial O2 tension/PaO2 < 200 mm Hg for inspired O2 concentration FIO2 = 100%).

shunting

Lung physiology The bypassing of alveoli by blood circulating through the lungs Etiology Atelectasis, portal hypertension, small airway obstruction, smoke inhalation injury Diagnosis Hypoxemia that only partially improves with high inspired O₂ concentrations–eg, arterial O₂ tension/PaO₂ < 200 mm Hg for inspired O₂ concentration FIO₂ = 100%

shunting

A condition in which blood, by going through an abnormal pathway or bypass, does not travel its normal route. It may occur when an arteriovenous fistula forms or in congenital anomalies of the heart in which the blood passes from the right atrium or ventricle directly to the left atrium or ventricle respectively, through a defect in the wall (septum) that normally separates the atria and ventricles. Synonym: blood shunting

单词	shunting
释义	shunting shunt S0378900 (shŭnt)n.1. The act or process of turning aside or moving to an alternate course.2. A railroad switch.3. Electricity A low-resistance connection between two points in an electric circuit that forms an alternative path for a portion of the current. Also called bypass.4. Medicine A passage between two natural body channels, such as blood vessels, especially one created surgically to divert or permit flow from one pathway or region to another; a bypass.v. shunt·ed, shunt·ing, shunts v.tr.1. To turn or move aside or onto another course: shunting traffic around an accident.2. To evade by putting aside or ignoring: urgent problems that society can no longer shunt aside.3. To switch (a train or car) from one track to another.4. Electricity To provide or divert (current) by means of a shunt.5. Medicine To divert or permit flow of (a body fluid) from one pathway or region to another by surgical means.v.intr.1. To move or turn aside.2. Electricity To become diverted by means of a shunt. Used of a circuit. [Middle English shunten, to flinch.] shunt′er n. shunting (ˈʃʌntɪŋ) n (Railways) railways the act or job of manoeuvring coaches Translations smistamento shunting shunting [′shənt·iŋ] (electricity) The act of connecting one device to the terminals of another so that the current is divided between the two devices in proportion to their respective admittances. Shunting The act of connecting an electrical element in parallel with (across) another element. The shunting connection is shown in illus. a. An example of shunting involves a measuring instrument whose movement coil is designed to carry only a small current for a full-scale deflection of the meter. To protect this coil from an excessive current that would destroy it when measuring currents that exceed its rating, a shunt resistor carries the excess current. Illustration b shows an ammeter (a current-measuring instrument) with internal resistance R_A. It is shunted by a resistor R_S. The current through the movement coil is a fraction of the measured current, and is given by the equation below. With different choices of R_S, the measuring range for the current I can be changed. See Ammeter, Current measurement Similar connections and calculations are used in a shunt ohmmeter to measure electrical resistance. Shunt capacitors are often used for voltage correction in power transmission lines. A shunt capacitor may be used for the correction of the power factor of a load. In direct current shunt motors, the excitation (field) winding is connected in parallel with the armature. See Direct-current motor, Ohmmeter, Resistance measurement In electronic applications, a shunt regulator is used to divert an excessive current around a particular circuit. In broadband electronic amplifiers, several techniques may be used to extend the bandwidth. For high-frequency extension, a shunt compensation is used where, typically, a capacitor is shunted across an appropriate part of the circuit. Shunt capacitors (or more complicated circuits) are often used to stabilize and prevent undesired oscillations in amplifier and feedback circuits. See Amplifier, Feedback circuit shunting shunting The bypassing of alveoli by blood circulating through the lungs. Aetiology Atelectasis, portal hypertension, small airway obstruction, smoke inhalation injury. Diagnosis Hypoxaemia that only partially improves with high inspired O2 concentrations (e.g., arterial O2 tension/PaO2 < 200 mm Hg for inspired O2 concentration FIO2 = 100%). shunting Lung physiology The bypassing of alveoli by blood circulating through the lungs Etiology Atelectasis, portal hypertension, small airway obstruction, smoke inhalation injury Diagnosis Hypoxemia that only partially improves with high inspired O₂ concentrations–eg, arterial O₂ tension/PaO₂ < 200 mm Hg for inspired O₂ concentration FIO₂ = 100% shunting A condition in which blood, by going through an abnormal pathway or bypass, does not travel its normal route. It may occur when an arteriovenous fistula forms or in congenital anomalies of the heart in which the blood passes from the right atrium or ventricle directly to the left atrium or ventricle respectively, through a defect in the wall (septum) that normally separates the atria and ventricles. Synonym: blood shunting ThesaurusSeeshunt
随便看	richs rich seam rich-seam rich seams rich-seams rich site summary richt richter richter, adrian ludwig richter a mahler richter, august g richter, august g. richter, burton richter, charles f. richter, conrad richter forceps richter, gerhard richter, gisela richter, hans richter, hans theo richter, hans werner richter hernia richterite richter jean paul richter jean paul friedrich