1. Direct current is current with no reversals in polarity.

2. The wiper motor is a permanent-magnet direct current (DC) one. It is equipped on the front windscreen glass with the mechanical parts of the worm gear.

3. Results indicate that wear under the direct current magnetic field is much lower than that without magnetic field, the wear is reduced with increasing the magnetic density.

4. Today the breakeven point between alternating cur-rent and direct current is approximately 400 miles (640 km) for overhead lines and 20- 25(32- 40 kin) miles for underground cable.

5. A fuzzy model of a direct current series motor was given and a root-mean-square error was used to verify the criterion of 9 fuzzy models.

6. By using slow change direct current little signal in computer on a chip, we can make D/A converter performA/D converter function.

7. Adopted unique ventilation system and non - carbonate direct current motor stabilize the hot airflow.

8. Brushless direct current motor drive system based on DSP in the HVC is researched by digital control manner in the paper.

9. These reliable direct current generators provide a voltage output directly proportional to the rotational speed of the armature shaft and are specifically designed for speed control applications.

10. As compared with the brush-plating with direct current, the sur- face roughness of plated layer is lowerd, its hardness is raised, the binding of plated layer with the base metal is improved.

11. The paper briefly describes the theory of direct current sensor based on magnetic potential self-balance and feedback compensation and the structure of prototype machine based on this theory.

12. Adopted unique ventilation system and rotational direct current motor stabilize the hot airflow.

13. Some kinds of batteries can be recharged by connecting them to a source of direct current.

14. Diodes are electronic devices which rectify alternating current to direct current.

15. In his teens he had begun to fiddle with the concept of a substitute for direct current.

16. It was Edison who designed and introduced the electrical distribution system for incandescent lighting by direct current.

17. Photovoltaics is a method of generating electrical power by converting solar radiation into direct current electricity using semiconductors that exhibit the photovoltaic effect.

18. The influence of bias current and modulation frequency on chaos dynamics of vertical-cavity surface-emitting laser (VCSEL) subject to direct current modulation is investigated by numerical simulation.

19. A power converter circuit (3) drives a switching device by the pulse-width modulated wave for converting a direct current into the three phase alternating current.

20. In this paper, parametric variation method is used in kinematic equation of series excitation direct current motor with different turning velocities.

21. The unit consists of auto air brake switch, commutation transformer, commutation unit, direct current contactors.

22. The alternate current line side realizes the decoupling control of active power and reactive power through double closed loop and the stability of direct current voltages at the same time.

23. The four-quadrant convertor experiment which is under the transient direct current control has been finished. The experimental result proves the correctness of the analysis conclusion.

24. The temperature control system based on DS18B20 adopts C8051F020 and its external interface circuit to carry out the measurement control for direct current manostat power temperature.

25. It is an unilateralism -transforming device, which can dispart high import voltage when inputting and outputting by tums, and outputs low voltage of direct current.

26. This paper introduces the design of an all digital control PWM direct current servo system by using monolithic microcomputer as controller.

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27. Nickel is electrochemical micromachininged using nanosecond pulse power , millisecond pulse power and direct current power.

28. Methods 78 patients were sinus rhythm by oral quinidine or amiodarone or direct current cardioversion.

29. By making good use of the intelligent measure and control function of the Microprogrammed Control Unit, the numerical-controlled and scanned direct current source is designed.

30. The elevator model was made by using devices such as limit switch, nixie tube, direct current motor.

1. Some kinds of batteries can be recharged by connecting them to a source of direct current.

31. The women built battery-powered direct current lamps to replace kerosene lanterns widely used in local homes—a known source of indoor air pollution.

32. If a direct current electric field was applied to a polluted soil, the contamination would be motivated in a different way by the electroosmosis and electromigration.

33. The product widely is suitable for electrical machinery electric appliance's and so on generator, direct current motor, pulling motor, transformer and metallurgy profession insulations .

34. Firstly, a whole design project, that a direct current motor and a harmonic drive reducer are used to drive the actuator is determined.

35. A kind of xenon lamps stabilizer is designed which is made up of the tripper-circuit with two-leveled rising voltage and the direct current power circuit with frequency conversion mode.

36. It can be obtained the trace to the source of large direct current with self-balancing DC comparator through self-calibration circuit, addition circuit, compare circuit and multiplication circuit etc.

37. The disturbance resistant of LH coil and the circuit structure of analogue electronic switching matrix, integrator, direct current detector are especially studied.

38. Two Critical concepts involved in direct current ice-melting technique of high voltage over head line, the least ice-melting current and the max allowed current was presented.

39. The constant direct current - stimulation can accelerate the growth and induct tendency of cells.

40. Its application to permanent magnet direct current motor design expert system verifies its validity and effectiveness.

41. The design of DC(Direct Current)Disk Electromagnetic Brake ensures high brake moment and quick reliable braking with little noise.

42. The utility model relates to a direct current forcipate ammeter.

43. Combined with the problems during the experiment, design a improved testing circuit of Direct Current Attenuation Method.

44. The paper discusses the design of double closed loop regulation system of speed and current and establishes the mathematical model of brushless direct current motor.

45. The break of direct current main in cyanuramide product happened for many times and it had been influenced the usual product. The faults were analysed and the improvement measures were given.

46. The equipment to economize electric power adopts direct current supply, which comes from 220V/10V 2W transformer, then commutes and passes through Manostat 7812.

47. Synchronous motor excitated magnet by direct current can make output mechanism specialities matched load specialities by means of adjusting exciting current to change magnetic field and power factor.

48. The process of N 2 discharge in direct current electric field is simulated by Monte Carlo method.

49. This article introduces design principle and making method of self making teaching aids of simple direct current motor, it provided perceptive materials for students to understand motor's principle.

50. In order to solve the problem, the disturbance state observer and direct current control system with feed forward compensation are designed.

51. Then it elaborates the merit of direct current electric arc of discharge.

52. Methods 78 patients were converted to sinus rhythm by oral quinidine or amiodarone or direct current cardioversion.

53. Direct Current Injection as a substitute for direct illumination of the missile in free space is assessed on the basis of results.

54. The testing device of direct current injection is manufactured and tested in space-time and frequency.

55. The switch element generates an alternate current voltage having a quasi-higher frequency from a direct current voltage.

56. A non-contact direct current sensor with a permalloy core and Mos-FETs based on the principle of the magnetic multivibrator has been designed.

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57. A calculation method based on the concept of "senary" is presented, to start up a contra-rotative rare earth permanent magnet brushless direct current motor (CR REPM BLDCM).

58. A pilot study is showed with the principium of sending set and receiving set for non-wires remote control and with direct current motor's both direction control with H-bridge.

59. This text introduce a verified method of direct current high voltage supply source making use of digit multimeter and voltage ratio standard in high voltage and high resistance measure instrument.

60. A direct current plasma spray gun was designed in which separation sections were set between anode and cathode to restrict the large-scale diffluence of arc.

61. The utility model relates to a permanent brushless direct current motor. The motor comprises a casing, a front end cover, a rear end cover, a stator, a rotor and a position sensor.

62. Objective To explore the effects of direct current on vibration of cochlear basilar membrane.

63. Based on the practice of Guangzhou metro line 2, the components of direct current operation power supply system and the principles and functions of its every branch system are introduced.

64. This paper takes about use and illumination of the principle of direct current motor, futher explains its effect in teaching.

65. Transmission losses will be less than 7 percent, significantly less than the losses from conventional 500-kilovolt (kV) high-voltage direct current (HVDC) transmission schemes.

66. Based on the research of several direct current follow up control method, the paper designed a small inertia current tracking control method which is based on SVPWM coordinate conversion.

67. Thermal recovery boiler, the key equipment of heavy crude extraction, is a direct current horizontal boiler.

68. This paper introduce the application of siemens digital direct current timing device(6RA70) and program logical controller(SIMATIC S7-300) in piling bed electromagnet for the first time.

69. The seeding machine uses direct current, needs not to be manually carried for spreading, and can be connected with a battery jar of the tractor.

70. The energy consumption is an important economic index of electrolytic zinc process(EZP) which zinc is deposited in the zinc sulfate solution with direct current.

71. DA includes: framework, power part, amplifier electrical source, excitation commutating part, direct current generatrix and AC generatrix and logic part.

72. The electro-osmotic drainage can make the water flow toward the cathode of the direct current, then discharge from the cathode, thus lower the soils water content.

73. It has glow caution light, nightlight, direct current output function that could emergency charging for mobile phone, digital goods and so on and has FM radio function.

74. It works by the online type direct current chopped wave voltage stabilizing way and attains the voltage stabilizing precision by the control of PWM.

75. The basilar membrane vibration was elicited by tone and the effect of direct current stimuli were observed by Laser Doppler interference velocimeter .

76. DC voltage divider can be used to design lower voltage direct current power.

77. To solve this problem, a new method (EMDES), i. e. the fuzzy case design method, is proposed in this paper and applied to permanent magnet direct current motor design expert system (PMDCMDES).

78. This text presents that 8098 single chip processor's automatic judgement Logging at a certain time. timely cyclic monitoring's method and postulate, in monitor direct current bus is gnd or not.

79. The principle and process of dynamic testing the direct current resistance in transformer coil by "three points method" is introduced.

80. The research is based on the structure and principle analysis of digital direct current velocity modulation system of the mine hoister.

81. The brushless direct current motor (BDCM) used in attitude control and energy storage flywheel features a structure of large equivalent air-gap and large ratio of diameter to length.

82. To help smooth out the Direct Current available here, a capacitor can be used.

83. Must realize the direct current machine velocity modulation first to transform the alternating current into the cocurrent , this needs the leveling circuit.

84. The standard is applicable to stator coil and winding insulation alternative and direct current voltage withstanding test for AC generator, synchronous phase modifier and AC motor.

85. There are several alternate means of transmitting electric power, for example, by alternating or direct current, overhead or underground cable, and all over a wide range of voltages.

86. A strange phenomenon of pulsating direct current generated by hand alternator is discovered, a reasonable explanation is given, and the ways to improve the demonstrative test are also suggested.

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87. Direct current hot cathode plasma glow discharge chemical vapor deposition (DC-HCPCVD) is a new method to deposit high quality diamond films with high growth rate.

88. The direct current motor receives the driving current to drive the load to operate.

89. In this paper, a method used to amplify faint direct current signal is put forward, and the circuits of direct current amplifier to realize the method are devised.

90. Integrating electromotor and generator, a rare earth permanent magnet brushless direct current motor (REPM BLDCM) control system based on DSP in the HVC is studied.

91. The porous alumina film prepared by anodization of aluminum in chromic acid under constant voltage and direct current can absorb infared wave.

92. Railway applications - Rolling stock - Combined testing - Part 2: chopper - fed direct current traction motors and their control.

93. This paper presents the method of design and parameter optimizing in a phase-locked controller, which is used in high-speed brushless direct current motor (BLDCM) speed control.

94. The method of testing insulation resistance based on asymmetric electric resistance bridge for direct current (DC) distribution system is proposed.

95. At the same time the main control system has been described detailedly, which includes the control of the taboret's step motor and the main shaft's direct current machine, also their gang control.

96. The too high impact direct current high pressure may reduce the resistance of trouble point too fast, even turn into a metalline earthing trouble, thus bring the trouble to appointed work.

97. The earth point faults of direct current feed lines are localized with testing of leak current.

98. According to the direct current component of the generalized instantaneous power flowing into the two-terminal network, magnetizing inrush and internal fault can be distinguished.

99. An excitation control circuit tor direct current drive system of large power shovel has been designed.

100. The investigation of the measure principles of Direct Current Attenuation Method, Voltage Integral Method, and Direct Load Method.

101. Because of their higher dielectric constant, they are particularly suitable for use as an impregnant for low voltage, direct current, and impulse capacitors.

102. The history of top drive drilling system from direct current drive to variable - frequency drive is introduced.

103. The invention is used for measuring the distribution of the space charges in the high-voltage direct current power equipment insulation in the temperature gradient field.

104. The direct current type heating is a brand-new heating mode and has the advantages of low cost, high heat efficiency, low space irradiation and safe heating.

105. Some certain errors are existing for analyzing the sinusoidal signal of fundamental harmonic, non-integral harmonic and the decay quantity signal of direct current.

106. The hot carrier effects(HCE) in MOSFET are studied in this paper. Based on MOSFET lifetime model of direct current, we present MOSFET lifetime model of dynamic stress.

107. Direct current injection technique as a subsitute of high intensity radiated field test can be applied to EMC test.

108. The design principle and specific process of the pulse width servo amplifier is introduced, which is used to drive direct current motor to work.

109. The polarographic behavior of iodoacetic acid has been studied by using single sweep polarography, direct current polarography and cyclic voltammetry.

110. The phenomenon of a pulsating direct current in demonstrative experiment of hand alternator is founded and the reasonable explanation is presented.

111. The reasons why reverse current protection is not necessary in rectifiers of direct current traction substation are described.

112. In this article, An application of PLC on 110V direct current Voltage control circuit is introduced.

113. When direct current (DC) voltage is applied to water tree degraded cable, space charges will be formed in water tree.

114. The measuring of self-inductance coefficient by means of direct current bridge method has reduced the difficult and improved the precision of measuring.

115. It must be set up suitable quiescent point in order to works in linear region. This decides that the analysis of amplifier includes direct current analysis and alternating current analysis.

116. The brushless direct current motor used in magnetic suspending flywheel features a structure of large air and small ratio of length to diameter.

117. In the control system, the SIMOREG K 6RA24 full digital direct current cascade control unit has been successfully applied to the internal feedback, digital,[] cascade control system.

118. Moreover, an improved method is proposed for the phase current reconfiguration on the basis of the direct current circuit.

119. Security - constraints are the direct current ( DC ) capacities of transmission lines.

120. Change the electric circuit of transducer generally from commutate , the middle direct current link, go against to change and control 4 part constitute.

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