查询词典 on the threshold

The findings show that previous innovation accruement exerts great influences on current technological innovation and that import trade significantly enhances China's technological innovation ability, with human capital threshold effect on high-level technological innovation. In addition, impacts of import trade on China's technological innovation have regional differentiation, gradually diminishing its impacts from eastern to western areas.

研究发现：过去的创新积累对当期的技术创新有重要影响；进口贸易对我国技术创新能力的提升有显著的促进作用，其中对高水平技术创新的影响存在人力资本"门槛"效应；此外，进口贸易对我国技术创新的影响存在区域差异性，即影响程度呈现出从东部地区向西部地区递减的现象。

In this paper, a new real AdaBoost algorithm based on multithreshold method was developed. Through the selection method of multioptimization threshold and combining the strategy of weak classifier threshold selection in discrete AdaBoost algorithm, the rational division of sample space was implemented.

对基于连续AdaBoost算法的人脸检测方法进行了改进，结合离散AdaBoost中弱分类器的阈值选取策略，通过多重最优阈值选择方法实现了样本空间的合理划分。

Experimental evaluation on real data sets show the efficiency of CEM on communication reduction over distributed threshold monitoring.

真实数据集上的实验表明，CEM方法能够有效降低分布式阈值监控中的通信开销。

The Periscope Drawtube will be bent because of the water resistance in sailing and this bend will cause the error of star measurement. Due to its especial structure, contactless measurement is the only way to measure its bend degree. First this paper introduces the method by linear array CCD based on structure and light path; Second it expatiates linear array CCD work principle and driving scheduling with example of TCD1501C and the driving circuit by CPLD. The output signal of linear array CCD includes common disturbance so the differential amplifier is needed. In order to make the signal adapt to computer processing, a threshold circuit with Schmitt characteristic and the data process following threshold are given. At last, some key problems in application are given.

潜艇潜望镜的镜筒在航行时受到水的阻力会产生弯曲变形，这种变形会造成潜艇对星体测量的误差；由于镜筒结构的特殊性，对其弯曲程度的测量只能采用非接触方法；首先从结构和光路方面介绍采用线阵CCD作为检测元件实现对镜筒弯曲程度的测量；其次以东芝公司的线阵CCD（TCD1501C）为例阐述了其工作原理及驱动时序的控制要点，并介绍了基于可编程逻辑器件的线阵CCD的驱动电路；线阵CCD输出的信号中含有共模干扰，必须采用差分放大器将其抑制；为将信号转化为适合计算机处理的数字信号，文中给出了有一定实用价值具有施密特特性的二值化处理电路及二值化后的数据处理过程；最后阐述了在实际使用中的一些关键问题。

It is the first important step in video analysis and will directly affects the effectiveness of indexing Shot boundary detection is one of our major research interests and we will tackle the following existing problems the ambiguity between gradual change and camera motion, the discontinuity during gradual change, false detection caused by illumination variation and flashlight, automatic threshold selection Firstly, we discuss shot boundary detection in non-compressed domain In chapter 2, we compare some of the commonly used detection methods which are based on frame difference and point out that single feature will not generate good results As a conclusion, we use fuzzy logic to combine multiple features Presently, most frame difference based shot boundary detection algorithms rely on threshold and hence the selection of such thresholds will greatly affect the performance of boundary detection We propose a membership function to define frame difference and calculate the membership with self adaptation according to the statistic distribution of frame differences to satisfy different type of video clips Experiments show that the proposed fuzzy shot boundary detection algorithm can be used with different video types and has a high detection precision and recall In chapter 3, we discuss model-based shot boundary detection algorithms regarding chromatic and spatial editing effects such as fade-in, fade-out, dissolve and wipe Various parameters are proposed to better describe the characteristics of each editing type.

镜头边界的检测是把视频自动地分割为一个个镜头，作为基本的索引单元，因此它是视频分析重要的第一步，直接影响到视频检索的成败。镜头边界的检测是本文研究的重点之一。目前镜头边界检测算法主要存在以下问题：渐变与镜头运动难以区别；渐变过程中的不连续与停顿、光照条件的变化及闪光灯等特殊情况会引起误检测；自动选择阈值比较困难等。本文首先针对非压缩域视频进行了镜头边界检测的研究。在第二章中我们采用了比较流行的基于帧间差的方法。在比较各种帧间差计算方法的基础上，指出使用单一的特征难以取得很好的检测效果，提出用模糊逻辑综合使用各种特征。目前大多数基于帧间差的镜头边界检测算法都采用阈值法进行镜头转换的判别。阈值选择的误差对检测性能有较大的影响，本文提出用隶属度函数定义帧间差较大、中等较大和较小等概念，并根据帧间差的统计分布自适应地确定隶属度，以适应不同类型的视频片断。实验结果表明这种基于糊逻辑的镜头边界检测算法可以适应不同的视频，并具有较高的检测精度和检出率。在第三章中采用基于模型的方法进行镜头渐变的检测，研究了淡入／淡出、慢转换和扫换的模型。

Based on AFCT, a new adaptive staring principle is established using floating threshold which is calculated by system reference model based on extrapolation method and linear regression algorithm. The principle of "forecasting model on line identifier"and"forecasting model parameters'selftuner"are put forward. In the module of"adjustment mechanism", the forecasting method of break points is introduced to fulfill control functions to "forecasting model parameters'self tuner".

本文详细讨论了针对输电线路主保护的自适应预测模型的建立方法，应用时间序列法和自回归模型或动平均自回归模型建立了精确反映保护对象状态量的系统预测模型，以自回归模型为例给出了"预测模型在线辨识"环节和"模型参数自适应校正"环节的算法，应用"适应机构"实现其对"模型参数自适应校正"环节的控制作用，应用并行计算算法实现了在继电保护中的"预测模型在线辨识"环节，使系统状态预测模型自适应于变化的电力系统。

Then the corrected average hearing threshold of 0.5 kHz, 1 kHz, 2 kHz, 4 kHz and the average hearing threshold of 1 kHz,2 kHz,4 kHz were compared for analyzing the impact of their differences on hearing grades.

为了达成一致，我们在实际操作中对0.5k Hz听阈值进行了修正，对0.5kHz听阈值在计算平均听阈值时的影响进行了分析，结果报告如下。1对象和方法1.1样本和对象以2001年《贵州省年鉴》人口统计数据为基准，按容量比例概率抽样法

The study of vertical channel with high field effect mobility by Ni induced lateral crystallization, which can form larger grains on channel regions and reduce grain boundary defects. We detect the method of Ni induced lateral crystallization through high field effective mobility, but that accumulates too much Ni on floating N+ region and causes defects and metal contamination. As Ni is used to form silicde and then proceed to low temperature annealing, we can observe the floating region that has no Ni acumination regions or contaminations. This aids us in obtaining good electronic performance of this device, not only the remote field effective mobility but also the vast improvement of sub-threshold swing and on/off currents.

接著，是延续垂直通道的研究，希望能有效的提升电子迁移率，因此以镍金属诱导横向结晶的方式使通道形成较大的结晶，减少矽晶粒之间的缺陷，而在初步的研究，发现以镍金属直接诱导横向结晶的方式，经由低温长时间回火之后，由於镍金属扩散的关系，完成诱导结晶之后，有过多的镍金属聚集在顶部参杂的中间区域，而造成过多的缺陷累积，虽然电子迁移率有效的提升，但整体的电性并不如预期，因此提出先形成镍金属矽化物后，将未反应的镍金属或金属氧化物去除之后，再进行镍金属矽化物诱导横向结晶处理，经由结果观察得知在顶部掺杂区域部分没有明显的镍金属累积或污染，并且得到很好的整体电性，除了电子迁移率有效提升之外，次临界特性以及导通电流都能有效改善。

During the updating and mining of TCIS-Tree several optimal strategies, such as data filtering, heuristically and dynamically adjusting the pruning threshold and mining threshold, and so on, have been explored to make our method efficient.

在TCIS-Tree的更新和挖掘过程中，采用数据过滤、启发式动态调整剪枝阈值、挖掘阈值等若干优化措施，有效地提高算法的时空效率。

Data preprocessing method of Web log mining is studied. Frame pages filtering and overtime threshold value seting are analyzed. The improved method based on induction of decision tree(ID3) algorithm and threshold value dynamic amendment algorithm is proposed.

对网络日志数据挖掘预处理技术进行研究，针对Frame页面过滤方法与超时阈值设定进行分析，提出了应用ID3算法改进Frame页面过滤过程中丢失SubFrame页面信息且需要进行站点提升步骤。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。