查询词典 on the threshold

Through minimizing the Stein Unbiased Risk Estimate based on the function, the optimal threshold, varying with the signal and noise, is obtained in the Mean Square Error sense.

进而通过极小化SURE估计得到MSE意义下自适应于信号和噪声的最优阈值。

This method mainly studies the change detection based on the judge of temple and threshold value of the land use class. The land use patch is expressed by vector polygon along with raster region. First the spectrum feature databank with histogram, texture and shape features of the patch is formed. Then, the patches are classified and their change types were judged.

其基本思路是在矢栅位置配准的基础上，以矢量多边形和栅格面阵共同表示的土地利用图斑为基本单位，建立土地类别解译标识，在此基础上对所有图斑进行基于图斑的分类、利用检测模板和阈值来判断图斑类型是否发生变化，并对变化图斑进行表示和更新。

Had he done so, he would have seen the host of the Cross of Colbas standing on his threshold, surrounded by all the guests of his inn, andall the passers-by in the street, talking vivaciously, and pointing him out with his finger; and, from the glances of terror and distrust cast by the group, he might have divined that his arrival would speedily become an event for the whole town.

假使他回转头来，他就会看见那柯耳巴十字架的旅舍主人正立在他门口，旅舍里的旅客和路上的行人都围着他，在那里指手画脚，说长论短；并且从那一堆人的惊疑的目光里，他还可以猜想到他的出现不久就要搞得满城风雨。

It is observed that the threshold voltage, gain factor and current in linear and saturation region mismatch linear depend on the inverse of the square root of the device area.

由已经获得的经验知道，线性区和饱和区的阈值电压、增益及电流等参数的不匹配性均与器件面积的平方根成反比。

We obtain the eigenfunction through inverse transform,and select appropriate threshold to extract iso-surface.We append the weighted coefficients on sampling density for non-uniform sampling to further compute rational thresholds.

调用快速傅立叶变换FFTW(The Fastest Fourier Transform in the West)软件包，根据点的位置和法向量计算傅立叶系数，通过逆变换求出特征函数，选择合适的阈值提取表面的等值面，对于非均匀采样通过采样密度的加权系数进一步计算合理的阈值。

In this paper,we propose a color image denoising algorithm based on the second generation Bandelet transform to aim at the latest development of the characteristics of the Bandelet transform. The algorithm takes full advantage of the inherent geometry regularity of color images, gets the optimization expression, sets the threshold using noise intensity, and realizes color image denoising using the softthreshold function.

针对目前最新发展的Bandelet变换的特点，本文提出了基于第二代Bandelet变换的彩色图像去噪算法，充分利用彩色图像内在的几何正则性，自适应获得彩色图像的最优表示，通过噪声强度设置阈值，并利用软阈值函数实现彩色图像去噪。

This project was conducted starting with the three interrelated subjects the structural characteristics of desertification landscapes in different bioclimatic zones, desertification driving factors and their function mechanism, and the dynamic model of landscape space for the occurrence and development of desertification in representative desertification regions and on the basis of in-depth studies of the relations between landscape structural characteristics and processes of desertification and their stability; the driving force of different time-space scales of desertification and their proportion, manifestation form, and action mechanism in the desertification processes; and the establishment of threshold conditions for the surface wind erosion and has achieved important progress in the definition of desertification conception

本课题从三个相互联系的专题（即不同生物气候区荒漠化景观的结构特征、荒漠化驱动因素及其作用机理、典型荒漠化地区荒漠化发生与发展的景观空间动力学模型）入手，在深入研究荒漠化景观结构特征与过程的关系及其稳定性，不同时空尺度的荒漠化过程驱动力及其在荒漠化过程中所占比重、表现形式及作用机制，地表风蚀临界条件的确定等内容的基础上，虽未建立荒漠化景观空间动力学模型，但在沙漠化概念，末次间冰期以来沙漠化过程时间序列和特征冷暖时期沙漠、沙地空间分布格局，现代沙漠化过程中自然因素和人文因素的作用、贡献率、沙漠化土地对气候的反馈作用以及风蚀临界值，沙粒跃移轨迹参数和能量分布，我国沙漠化防治思路和对策，沙尘暴区划和沙尘暴指数等方面取得了重要进展。

Animals in model group received L5 left hemilaminectomy and L5 dorsal root ganglion epineuriumet section and caudal vertebrae nucleus pulposus autograft,which was used to establish a modified rat model of non-compressed lumbar intervertebral disc herniation,while animals in Sham group received muscles autograft.50% paw withdraw threshold（50% PWT） of left hind limb was measured 1 day before surgery and on the 1st,3rd,7th,14th and 21st day after surgery in each group by "Up-Down" method to detect the change of the mechanical hyperalgsia.

模型组在左L5神经背根神经节应用自体髓核组织移植建立大鼠非压迫性腰椎间盘突出模型，假手术组应用自体肌肉移植。

"Sleep disruptions were similar in the NR and RD conditions, but did not involve REM sleep; the effects on pain threshold observed in the RD condition were therefore due specifically to the loss of REM sleep, not to the disruption of sleep per se," noted Dr. Roehrs."We found that REM loss itself was hyperalgesic."

Roehrs博士强调，在无快速眼动睡眠的因素下，NR及RD的睡眠干扰情况皆类似；在RD状态时，疼痛感受值会受到影响，这主要是因为丧失快速眼动睡眠的关系，而不是睡眠本身受到影响；我们发现，快速眼动睡眠的丧失，本质上就是痛觉过敏。

Methods:Separately test the threshold values such as sense of cold, sensation of warmth, cold pain sensation and sense of heat pain of the testees on the left thenar eminence and left hypothenar eminence. Of the tests 28 persons were simultaneously tested of the identical left and right lateral positions and 21 persons were repeatedly tested two weeks later .

检测230例正常人左手大小鱼际肌的冷觉、温觉、冷痛觉、热痛觉，对其中28例右手做相同测试，对其中21例2周后做重复测试。

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。