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负荷因子 load factor
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考题
多载波小区间的负荷均衡最初只考虑了小区下行功率,后因小区码资源拥塞严重,此时需要打开基于码资源的负荷均衡,下面参数中需要调整的是()
A.Load Balance Switchfor Code（基于码资源负荷均衡开关）B.Code Weightfor Load Balance（负荷均衡码资源权重）C.Downlink Power Weightfor Load Balance（负荷均衡下行功率权重）D.Uplink Interference Weightfor Load Balance（负荷均衡上行干扰权重）
考题
下列哪种体液因子对造血起到抑制作用A、类胰岛素生长因子（insulin－like growth factor，IGF）B、干扰素α（interferon－α）C、集落刺激因子（colony stimulating factor，CSF）D、血小板生成素（thrombopoietin，TPO）E、干细胞因子（SCF）
考题
材料：The field current supply in older machines comes from a lower voltage direct current generator or exciter on the same shaft as the alternator. Modern machines however are either statically excited or of the high-speed brush-less type. The exciter is required to operate to counter the effects of power factor for a given load. The power factor is a measure of the phase difference between voltage and current and is expressed as the cosine of the phase angle. With a purely resistance load the voltage and the current are in phase, giving a power factor of one. The power consumed is therefore the product of voltage and current. Inductive or capacitive loads, combined with resistance loads, produce lagging or leading power factors which have a value less than one.The power consumed is therefore the product of current, voltage and power factor. The alternating current generator supplying a load has a voltage drop resulting from the load. When the load has a lagging power factor this voltage drop is considerable. Therefore the exciter, in maintaining the alternator voltage, must vary with load current and also the power factor. The speed change of the prime mover must also be taken into account.问题： The word “machines” in the passage refers to _____.A.the direct current generatorB.the alternating current generatorC.the exciterD.the prime moverWhich of the following statements is true according to the passage ?A.With a purely resistance load, the power factor is zeroB.Inductive loads combined with resistance loads produces leading power factorsC.Capacitive loads combined with resistance loads produces lagging power factorsD.With a purely resistance load, the phase angle is zeroWhen the load has a lagging power factor this voltage drop is considerable. This sentence means that _____.A.with a purely resistance load, the voltage drops too muchB.there is a considerable voltage drop in the capacitive load combined with resistance loadC.when the load is the capacitive load combined with resistance load, the voltage drops to zeroD.when the load is the inductive load combined with resistance load, the voltage drop is fairly largeThe exciter must vary with: ① load current ② the power factor, ③ speed change of the prime mover.A.①B.②C.①②D.①②③请帮忙给出每个问题的正确答案和分析，谢谢！
考题
下列哪种体液因子对造血起到抑制作用A.干细胞因子(SCF)B.干扰素a(interferon-α)C.集落刺激因子(colony stimlulating factor，CSF)D.类胰岛素生长因子(insulin-like growth factor，IGF)E.血小板生成素(thrombopoietin，TPO)
考题
多载波小区间的负荷均衡最初只考虑了小区下行功率，后因小区码资源拥塞严重，此时需要打开基于码资源的负荷均衡，下面参数中需要调整的是（）A、Load Balance Switchfor Code（基于码资源负荷均衡开关）B、Code Weightfor Load Balance（负荷均衡码资源权重）C、Downlink Power Weightfor Load Balance（负荷均衡下行功率权重）D、Uplink Interference Weightfor Load Balance（负荷均衡上行干扰权重）
考题
单选题The load between two steam-driven alternators operating in parallel may be adjusted by varying （）A
the speed of the alternatorsB
the field strength of the machinesC
the power factor of the alternatorsD
steam supply to the prime movers
考题
单选题With a purely resistance load the voltage and current are in phase, giving a power factor of （）.A
oneB
less than oneC
more than oneD
negative one
考题
单选题EffiCieNCy fACtoR：对于分组交换业务为有效因子，代表数据有效因子，可理解（）A
EffiCieNCy fACtoR=1-误码率B
激活因子C
传输效率因子D
其他
考题
单选题The alternating current generator supplying a load has a voltage drop resulted from the loadWhen the load has a lagging power factor this voltage drop （）.A
is smallB
may be neglectedC
is usefulD
is considerable
考题
单选题To （） , the power is supplied by main switchboard directly not though sub-board.A
save network costB
improve the reliability of supplying power to important loadC
prevent sequence reverseD
increase the power factor of important load
考题
单选题（）is a function of the reactive / resistive characteristics of the load items and cannot be adjusted by manipulating the alternator control devices.A
Power factorB
Power ratioC
compression ratioD
Compression factor
考题
单选题To equalize the power factor of two alternators operating in parallel, the （）A
field excitation of both units is adjustedB
governors of both units are adjustedC
phase sequence is alteredD
kilowatt load is evenly divided
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