threshold speed

To overcome the difficulty of manual threshold selection and slow speed of conventional region growing image segmentation algorithm, a region evolution image segmentation algorithm is proposed.

为克服经典区域增长算法中门限选择困难、分割稳定性不高与串行处理速度慢的不足，提出了基于区域进化的快速区域增长图像分割算法。

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A revised formula for calculating the stability threshold speed of turbine-generator bearings is presented.

对现用的汽轮发电机组轴承失稳转速的计算公式进行了修正，提出了修正公式。

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This method uses a linear CCD as photoelectric sensor. After binarized processing, CCD output signal is stored with high speed in SRAM, then finished the data gathering function. The binarized threshold signal is provided by the software through digital potentiometer.

该方法采用线阵CCD作光电传感器，CCD输出信号经二值化处理后采用静态存储器进行高速存储，完成数据采集的功能，且可通过数字电位器用计算机软件提供二值化阈值信号。

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Effect of Irregular Sand Grains and Electrostatic Force on Threshold Wind Speed

沙粒形状的不规则性及静电力对起动风速的影响

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There are significant differences in the minimum threshold wind speed in different land use types.

不同利用类型下垫面的起沙风速显著不同；

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By comparing, we concluded that the threshold speed of the oil whip of a rotor supported on nonlinear model of oil film force is lower than that on the linear model.

通过比较分析得出考虑油膜力的非线性特性后转子发生油膜振荡的转速提前。

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A Study of Race Walkers' Threshold Speed

竞走运动员阈值速度的研究

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By Changchun middle school elite middle distance runner increment load test, we get the maximum oxygen uptake and anaerobic threshold and the corresponding speed, heart rate.

对长春市中学优秀男子中长跑运动员进行递增负荷测试，得到其最大摄氧量和无氧阈及其对应的速度、心率。

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Application of Anaerobic Threshold Heart Rate and Anaerobic Threshold Speed in the Physical Ability Training of Women Football

无氧阈心率及无氧阈速度在女子足球体能训练中的应用

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The larger the mass ratio and the smaller the stiffness ratio, the lower the threshold rotating speed of instability.

质量比越大，刚度比越小，产生不稳定的门坎转速越低。

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Influence of Speed Ratio on Rattling Threshold Speed of a Gear System with Time-Varying Meshing Stiffness

传动比对齿轮时变系统拍击门槛转速的影响

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A-operator method ( AOM) is used to study the influence of the torque fluctuation and time-varying meshing stiffness on rattling threshold speed of the gear system.

用算符分解算法（AOM）研究了扭矩波动和时变啮合刚度对拍击门槛转速的影响。

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The conclusion offers us a simple approach to estimate the threshold speed of an actural rotor system and provide a theoretical foundation for the approach. The threshold speed can be found with Floquet theory and the unstable dynamic behaviors of the system are analyzed.

这一结论提供了一个用以估计实际转子系统失稳转速的简单工程计算方法.根据Floquet理论，判别系统的临界失稳转速，并由Floquet乘子来确定系统失稳后分岔方式。

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If lower mode damping is increased in order to limit the resonance amplitude, the rattle threshold speed will increase.

增大低阶模态阻尼，能够增大拍击门槛转速。

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Unbalance Response and Threshold Speed of Touch-Rubbing of a Rotor Subjected to Nonlinear Magnetic Forces

非线性电磁力作用下的转子不平衡响应和界限碰摩转速

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The systemof coordinates was adopted to work out the lactate threshold and the threshold speed.

本文采用坐标作图方法求得乳酸阈值及阈值速度。

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The threshold speed based on the linear theory is given and its localization in stability analysis is exhibited.

分析线性失稳转速在稳定性分析中的局限性。

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This paper analyzes the nonlinear vibration characteristics and stability of a symmetrical rotor of single mass supported on multi-wedge bearings, and studies the cause and danger of the semi-frequency vibration, which may occur between the first critical speed and the stability threshold speed of the system.

本文分析了多油楔轴承支承的单质量对称转子系统的非线性振动和稳定特性，研究了临界转速与失稳转速之间半频振动产生原因及其危害性。

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The SEMI-FREQUENCY vibration between the first critical speed and the stability threshold speed of a rotor system supported on multi-wedge bearings

多油楔轴承支承的转子系统在临界转速与失稳转速之间的半频振动轴系半频扭转共振现象的实验研究

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Real-time Image Tracking Based on Adaptive Threshold in High Speed TV

高速电视下基于自适应阈值的实时图像跟踪

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