英语翻译The experiments were performed on an electrical discharge small hole machine DK730 (made in China,modified by author).The worktable of the machine was especially designed to accept an ultrasonic vibration unit,and the clamp of the machine

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英语翻译TheexperimentswereperformedonanelectricaldischargesmallholemachineDK730(madeinChina,modifiedbyau

英语翻译The experiments were performed on an electrical discharge small hole machine DK730 (made in China,modified by author).The worktable of the machine was especially designed to accept an ultrasonic vibration unit,and the clamp of the machine
英语翻译
The experiments were performed on an electrical discharge small hole machine DK730 (made in China,modified by author).The worktable of the machine was especially designed to accept an ultrasonic vibration unit,and the clamp of the machine was designed to accept high pressure gas when it turning.In experiments,the tool electrode was a cylindrical pipe with outer and inner diameters of 10 and 9 mm,respectively.The high pressure gas was supplied into working gap through internal hole of tool electrode.There was a gas drier between the compressor and the regula-tor to eliminate the influence of water vapor contained in the compressed gas on the machining characteristics.45# steel and copper were selected as workpiece and tool electrode,respectively.Air and oxygen gas were selected as gas mediums.
The ultrasonic generator (made in China) had a maximumpower of 100W with an adjustable frequency in the rangeof 17–23 kHz.The measured amplitudes of vibration during idling were 0.006mm at 50W and 0.012mm at 100W.The frequency used in experiments was set at 20.3 kHz (controlled through the adjusting knob).The stress of the gas could be change continuously from 10 to 500 kPa.The voltage supplied by power supply could be changed by step of 20V from 100 to 300V.
The MRR was measured using a dial gauge with an accuracy 0.001 mm.The rate of depth penetration was measured with a dial gauge and the MRR calculated by multiplying by the cross-sectional area of the penetrated aperture.The surface roughness is measured through a Talysurf 4_ surface measuring instrument (made in England) with a relative accuracy of five percent (5%).
The transistor pulse generator power supply is now commonly employed as a UEDM power supplier.It transforms the AC supply from the mains and provides a rectangular voltage waveform as shown in Fig.2.The amount of material removed from the workpiece depends on the characteristics of the electrodischarge voltage,current and time.The current–time diagram is shown in Fig.3.The time interval between switching the generator on and off is as the pulse duration (ts) while the time interval between switching the generator off and on for the next pulse is the pulse interval (ti).The ignition delay time (td) is the period of time during which the voltage remains at the value of the ignition voltage while the current stays at zero.When the spark ignites,the voltage drops.The mean voltage value from ignition topower-off is the discharge voltage (Ue).The current rises sharply following ignition.The mean value of the current from ignition phase to power-off phase is the discharge current (Ie).

英语翻译The experiments were performed on an electrical discharge small hole machine DK730 (made in China,modified by author).The worktable of the machine was especially designed to accept an ultrasonic vibration unit,and the clamp of the machine
实验执行了在一个放电小孔机器DK730 (制造在中国,由作者修改) .机器的工作台特别是被设计接受一个超音波振动单位,并且机器的钳位被设计接受高压气体当它转动.在实验,工具电极是一个圆柱形管子以10 和9 毫米外面和内在直径,各自地.高压气体被提供了入运作的空白通过工具电极内部孔.有气体烘干机在压缩机和管理者之间消灭水位影响蒸气包含在压缩的气体对用机器制造的特征.45 # 钢和铜被选择了作为制件和用工具加工电极,各自地.空气和氧气气体被选择了当气体媒介.超音波发电器(中国制造) 有100W maximumpower 以一个可调整的频率在rangeof 17-23 千赫.被测量的高度振动在虚度光阴期间是0.006mm 在50W 和0.012mm在100W .频率被使用在实验被设置了在20.3 千赫(被控制通过调整的瘤) .气体的重音能连续是变动从10 到500 kPa .电压由电源提供能被步20V改变从100 到300V .MRR 被测量了使用一个拨号盘测量仪以准确性0.001 毫米.深度渗透的率被测量了与拨号盘测量仪和MRR 由乘计算以被击穿的开口的断面.表面坎坷被测量通过一种Talysurf 4 _ 表面测量仪器(制造在英国) 以相对准确性百分之五(5%) .晶体管脉冲发生器电源共同地现在被使用如同UEDM 力量供应商.它变换AC 供应从扼要和提供长方形电压信号波形依照被显示在图2 .相当数量材料从制件被取消取决于electrodischarge 电压、潮流和时间的特征.当前时间图被显示在图3 .间隔时间在交换发电器之间断断续续是作为脉冲期间(茶匙) 当间隔时间在交换发电器之间和打开为下脉冲脉冲间隔时间(钛) .燃烧延迟时间(td) 是在期间电压依然是在燃烧电压的价值的时期当潮流停留在零.当火花点燃,电压下落.卑鄙电压价值从燃烧topower-off 是放电电压(Ue) .潮流尖锐上升跟随燃烧.潮流的平均值从燃烧阶段力量阶段是放电电流(Ie) .

英语翻译GRE阅读里面的一句话.怎么翻译?Given the great expense of conducting such experiments with proper controls,and the limited promise of experiments performed thus far,it is questionable whether further experiments in this area sho 英语翻译翻译ranging from building a spaceship to performing science experiments in the kitchen 英语翻译In the post weaning period up to 25 kg of body weight,results of 22 experiments have been considered:oneexperiment compared 4 levels of supply,12 experiments 3levels of supply and 9 experiments considered only twolevels of supplementation cut the rope experiments 5-20 攻略英语翻译Not long ago ,a university professor made several experiments with different animals to find out which was the most intelligent.He found out the monkey was more intelligent than other animals.In one experiments,the professor put a monkey 英语翻译Until recently,market experiments focused almost exclusively on the behavior of sellers.Like the theory the experiments are designed to test,buyers are assumed to act as passiveprice-takers.Thus,human buyers are replaced by a computer alg 英语翻译To have a better understanding about the importance of experiments in science.It is really difficult for the scientists to achieve their goal ,and only after tens of thousands of attempts,experiments,thinking and failure can they besucces 英语翻译The second-semester organic chemistry laboratory at this university used to rely heavily on cookbook-type experiments that included little characterization of reaction products.More research- and discovery-oriented experiments were desire 英语翻译Clark felt that his _participation__ in one of the most dramatic medical experiments of all time was worth the suffering he underwent. 英语翻译Such evidence of a positive effect in the Northern Hemisphere is something that all satellite observing system experiments still lack. 英语翻译In addition,only 4 experiments showed a significant effect for theimprovement of feed conversion,compared to the non-supplementeddiets (Figure 3b). 英语翻译要人工的准确的 This experiments has another surprise store contrary to the descriptions on record.特别是store 的翻译. 英语翻译原句The experiments were conducted in a zero-pressure-gradient flow at a freestream velocity of 32 m/s. 英语翻译mounting empirical evidence suggests that many animal experiments are performed callously without any heed to the discomfort or pain that laboratory mammals endure. Cut the Rope:Experiments 5-21 怎么过求cut the rope experiments 5-25攻略 They made the school a place for s__ experiments. 英语翻译The aim of the study was to examine the learners’ interests about chemistry experiments based on their previous scienceexperiences.Sample of the study consisted of 52 first year pre-service science teachers.The data gathered through che