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截止    
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  cutoff
    The experimental studies of "detail fatigue ratings cutoff (DFRcutoff)" of LY12CZ,LC4CS aluminum alloy and 30CrMnSiA steel commonly used in aircraft structures were conducted in different environment and aircraft structure durability design were provided with important experimental data.
    对LY12CZ、LC4CS铝合金和30CrMnSiA钢进行了不同环境介质下的“细节疲劳额定强度截止值(DFR_(cutoff))”的试验研究,提供了飞机结构耐久性设计的重要数据。
短句来源
    Influence of cutters' machining precision at each stage on the cutoff diameters of a cascade impactor
    多级冲击采样器各级切割器的加工精度对截止直径的影响
短句来源
    It is indicated that the influences of each cutter's machining precision of a cascade impactor on the cutoff diameter at different stage are different. The influence reaches maximum at the last stage.
    多级冲击采样器各级切割器的加工精度对采样器每一级截止直径的影响不同 ,其中最后一级切割器加工精度的影响最大。
短句来源
    In surface roughness measure, the spline filter does a better job than 2RC filter and Gauss filter, while there is no determinate definition for spline filter's cutoff, which limit the application of spline filter.
    在表面粗糙度测量中,样条滤波器比之前的2RC滤波器和高斯滤波器有更好的滤波效果,但是样条滤波器的截止波长λ,没有确定的定义,这使得样条滤波器的应用受到了限制。
短句来源
    In the following discourse, we supply a fresh method to work out the p parameter directly through data fit to get spline filter's cutoff and the formula with a mass of calculation. This p parameter can fix the transmission as 50% at spline filter's cutoff, also the correlation coefficient achieve 1, which is very close to actual calculation value.
    本文通过大量的计算,进行数据拟和得到了样条滤波器截止波长的拟合公式,通过该公式可以直接计算出p参数,它使得滤波器在截止波长处的传输特性为50%,而且其相关系数达到了1,非常接近实际的计算值。
短句来源
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  cut off
    The optimal process variables obtained for forming valve bodies and the successful formation of large size high pressure cut off valve bodies using a 10 000 kN screw press.
    最终在 10 0 0 0kN螺旋压力机上成功地锻造出大型高压截止阀阀体 .
短句来源
  cut-off
    ON THE“WHITE NOISE”AND CUT-OFF FREQUENCY OF ELECTROCHEMICAL NOISES DURING PITTING CORROSION
    孔蚀过程中电化学噪声的“白噪声”水平与截止频率的研究
短句来源
    As well known, whether the merits and demerits of the mining measures and mineral structures data are evaluated or the reasonable cut-off grade of the discharging extraction process etc are determined will depend essentially on the data of the ore loss and ore dilution.
    如所周知,无论是分析评价采矿方法及结构参数的优劣,还是确定崩落法放矿合理截止品位等,矿石的损失与贫化都是很重要的指标。
短句来源
    Contrasting and analyzing many schemes that are satisfied with the transition criterion, the way of cut-off step shaping was pointed out as optimum. Three principles of volume balance and its relevant formula were presented to solve the formula of step shaping curve.
    对比分析了多种满足过渡段设计准则的方案,指出最佳过渡方案为截止轧齐法,并给出了求解轧齐曲线方程的三种体积平衡原理及相应公式。
短句来源
    The characteristics of the test signals were analyzed and weak defect echo signals were successfully extracted by cut-off frequency technique.
    分析了检测信号的特征,并采用截止频率法成功地提取了微弱的缺陷回波信号。
短句来源
    The practical experiment is done, it further testifies the possiblity and advantages of the shear extrusion process which the large-size cut-off valve bodies of 12Cr1MoV alloy steel are successfully formed on the 10 MN screw press.
    最后通过生产性实验研究,在螺旋压力机上成功地锻造出12Cr1MoV合金钢的DN100电站锅炉用大型截止阀阀体,进一步验证了此新工艺的可行性和优越性。
  cut-off
    ON THE“WHITE NOISE”AND CUT-OFF FREQUENCY OF ELECTROCHEMICAL NOISES DURING PITTING CORROSION
    孔蚀过程中电化学噪声的“白噪声”水平与截止频率的研究
短句来源
    As well known, whether the merits and demerits of the mining measures and mineral structures data are evaluated or the reasonable cut-off grade of the discharging extraction process etc are determined will depend essentially on the data of the ore loss and ore dilution.
    如所周知,无论是分析评价采矿方法及结构参数的优劣,还是确定崩落法放矿合理截止品位等,矿石的损失与贫化都是很重要的指标。
短句来源
    Contrasting and analyzing many schemes that are satisfied with the transition criterion, the way of cut-off step shaping was pointed out as optimum. Three principles of volume balance and its relevant formula were presented to solve the formula of step shaping curve.
    对比分析了多种满足过渡段设计准则的方案,指出最佳过渡方案为截止轧齐法,并给出了求解轧齐曲线方程的三种体积平衡原理及相应公式。
短句来源
    The characteristics of the test signals were analyzed and weak defect echo signals were successfully extracted by cut-off frequency technique.
    分析了检测信号的特征,并采用截止频率法成功地提取了微弱的缺陷回波信号。
短句来源
    The practical experiment is done, it further testifies the possiblity and advantages of the shear extrusion process which the large-size cut-off valve bodies of 12Cr1MoV alloy steel are successfully formed on the 10 MN screw press.
    最后通过生产性实验研究,在螺旋压力机上成功地锻造出12Cr1MoV合金钢的DN100电站锅炉用大型截止阀阀体,进一步验证了此新工艺的可行性和优越性。

 

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  cutoff
Let Γ be a smooth compact convex planar curve with arc length dm and let dσ=ψ dm where ψ is a cutoff function.
      
The short-wave cutoff boundary of the capillary wave spectrum is established.
      
Thus, as the particle concentration increases, the central jump in compression [shock wave] moves in the direction of the nozzle cutoff, while the Mach number on the axis of the jet in front of the forward jump diminishes.
      
The results of an experimental study of a flow of rarefied gas of density ~10-5 g/cm3 beyond the cutoff of a hypersonic nozzle (M?11) by means of an electron beam with energy up to 43 keV are presented.
      
A study is made of the propagation of three-dimensional acoustic perturbations in a two-dimensional gas flow in axisymmetric channels of variable cross sectional area at frequencies near the cutoff frequency.
      
更多          
  cut off
Stabilograms of the body's general center of gravity (GCOG) were recorded for 15 s, including 6 s of silence, auditory stimulation (1.6, 3.2, or 4.8 s), and silence after the signal was cut off.
      
When the equilibrium was upset as a result of a change in plant weight, the movement of the beam's shutter cut off the flow of light incident on the photoelectric cell.
      
After 1, 2, 3, or 4 days, the treated leaves were cut off and mechanically infected with the potato virus X (PVX).
      
All leaves of young plants were cut off except the 4th, 5th, 6th, 7th, and 8th leaves.
      
We show that the threshold of the reaction under consideration tends to decrease with increasing z; the energy spectra of γ-ray sources at energies of ~10 TeV must be cut off in accordance with the calculated z dependence.
      
更多          
  cut-off
The results show that the 95% cut-off point for TC was 220 mg/dL, while for TG, it was 160 mg/dL.) increased significantly (P >amp;lt; 0.05).
      
PM was collected with a 13-stagelow pressure impactor (LPI) having an aerodynamic cut-off diameter ranging from 10.0 μm to 0.03 μm for a size-segregated collection.
      
The two cut-off points of these three stages are the preconsolidation stress and the structural yielding stress of the original clay, which could be determined by shear wave velocity measurement.
      
The proton energies of the population are below the low energy cut-off of the main dispersed proton population of the magnetosheath origin, and its intensity and density are also much lower.
      
The effect of the cut-off radius of the interparticle potential on the process of phase transformation is analyzed, and the position of spinodal of superheated liquid and supersaturated vapor is estimated.
      
更多          
  cut-off
The results show that the 95% cut-off point for TC was 220 mg/dL, while for TG, it was 160 mg/dL.) increased significantly (P >amp;lt; 0.05).
      
PM was collected with a 13-stagelow pressure impactor (LPI) having an aerodynamic cut-off diameter ranging from 10.0 μm to 0.03 μm for a size-segregated collection.
      
The two cut-off points of these three stages are the preconsolidation stress and the structural yielding stress of the original clay, which could be determined by shear wave velocity measurement.
      
The proton energies of the population are below the low energy cut-off of the main dispersed proton population of the magnetosheath origin, and its intensity and density are also much lower.
      
The effect of the cut-off radius of the interparticle potential on the process of phase transformation is analyzed, and the position of spinodal of superheated liquid and supersaturated vapor is estimated.
      
更多          
  其他


In the mining process it can hardly avoid to lose a fraction of ores along with dilution. As well known, whether the merits and demerits of the mining measures and mineral structures data are evaluated or the reasonable cut-off grade of the discharging extraction process etc are determined will depend essentially on the data of the ore loss and ore dilution. In this paper, the theoretical and practical analysis and the virtual problems about these indexes of the ratio difference between the recovery and dilution...

In the mining process it can hardly avoid to lose a fraction of ores along with dilution. As well known, whether the merits and demerits of the mining measures and mineral structures data are evaluated or the reasonable cut-off grade of the discharging extraction process etc are determined will depend essentially on the data of the ore loss and ore dilution. In this paper, the theoretical and practical analysis and the virtual problems about these indexes of the ratio difference between the recovery and dilution (or the stope coefficient) have discussed. As a consequence,author draws an argument that the curve of the ratio difference between the recovery and the dilution can only reflects the ups and downs of its variation of the recovery and the dilution rate. but it cann't be by virtue

采矿过程中,不可避免地要产生一定数量的矿石损失和贫化。如所周知,无论是分析评价采矿方法及结构参数的优劣,还是确定崩落法放矿合理截止品位等,矿石的损失与贫化都是很重要的指标。本文着重从理论和实际分析讨论了回贫差(或回采效率)指标的实质与问题,从而提出回贫差曲线仅仅反映矿石回收率与贫化率的增长变化情况,但不能用最大回贫差(或回采效率)值来确定放矿截止品位,也不能用它来比选采矿方法及其结构参数等。由于回贫差及回采效率指标,既不能综合代替矿石损失贫化指标,同时在技术经济分析中也起不到有价值的作用,还会造成混乱,故建议今后不再使用。

As we all know, the temperature coefficient of W (Mo)-wire resistance is high. So the W (Mo)-wire furnace is liable to produce overload current due to the temperature variation in operation especially during cold start-up of the furnace. At present, we often install quick-break fuses or transistor overcurrent protection circuit inside SCR device. An advanced ciruit-current auto-cutting-off protection circuit is recommended in this paper. This circuit has a falling V-A characteristic. So that no-trouble overcurrent...

As we all know, the temperature coefficient of W (Mo)-wire resistance is high. So the W (Mo)-wire furnace is liable to produce overload current due to the temperature variation in operation especially during cold start-up of the furnace. At present, we often install quick-break fuses or transistor overcurrent protection circuit inside SCR device. An advanced ciruit-current auto-cutting-off protection circuit is recommended in this paper. This circuit has a falling V-A characteristic. So that no-trouble overcurrent caused by the variation of furnace temperature is restricted within the rated operating range of SCR. Thus we can not only make the furnace operate normally and continuously and realize auto-temperature rising and regulation, but also reduce the plant capacity and save the investment. This circuit has been used in the Similar Heat-treatment Furnace and Vacuum Soldering Furnace developed by our research institute. It is of simple construction, low cost and practical use.

钨、钼材料的电阻温度系数较大,因而钨、钼丝炉在升温和工作过程中,由于炉温的变化,特别是冷炉起动时,极易产生过大的电流。在目前的可控硅装置中,常加装快熔或晶体管过流保护线路。 本文介绍一种更佳的过流保护方案——电流截止保护。它能获得下垂的伏安特性,可将钨、钼丝炉由于炉温变化引起的非故障性过流,抑制在可控硅允许的工作电流范围内。这样,不仅可保证炉子的连续正常运行,实现钨、钼丝炉的自动升温和控温,还可减小设备容量、节省投资。 本线路已成功地使用在我院研制的模拟热处理炉和真空钎焊炉上,具有简单、经济、实用的特点。

Investigations on the features of electrochemical noises during pitting corrosion of iron and two sorts of stainless steels were carried out under potentiostatic conditions.The results show that the fea- tures of the electrochemical noises from the fluctuation of current are common to all the systems studied,namely,the fluctuation spikes rise linearly and decay exponentially.Curves of spectral power density (SPD)for all the systems studied show that the electrochemical noises are low frequency 1/f~n noise and...

Investigations on the features of electrochemical noises during pitting corrosion of iron and two sorts of stainless steels were carried out under potentiostatic conditions.The results show that the fea- tures of the electrochemical noises from the fluctuation of current are common to all the systems studied,namely,the fluctuation spikes rise linearly and decay exponentially.Curves of spectral power density (SPD)for all the systems studied show that the electrochemical noises are low frequency 1/f~n noise and turn to“whitenoise”at very low frequencies.The estimated values of n lie between 2 and 4 depen- ding upon the nature of metals and the applied potential.The equation of SPD proposed in a previous paper is confirmed by the data in this work and the variation of the value of n is discussed based on this equation.

研究了钝化的纯铁在含 Cl~-的中性溶液中及304和321不锈钢在含 Cl~-的硫酸溶液中在低于孔蚀电位的恒电位条件下电流噪声的特征。结果表明,噪声电流峰具有线性上升而后按指数规律衰减的特征。在一定条件下噪声电流上升到最大值所需时间ιc 大致恒定,但ιc 随电位的升高而增大。功率密度谱(SPD)曲线的截止频率都低于20Hz,表明孔核的发生、成长与再钝化过程是相当缓慢的过程。所有 SPD 曲线在极低频率下具有白噪声的特征,即功率密度的水平不随频率改变。随着频率的升高,SPD 曲线显示噪声转变为1/f~n 噪声。视腐蚀体系和控制的电位之不同,测得的表观 n 值在2~4之间。实验结果征实了前一篇文章中导出的 SPD 方程式[1]是适用的。讨论了表砚 n 值落在2~4之间的原因。

 
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