查询词典 on the threshold

Results indicate that:(1) by using HANTS, the researchers could get the EVI/NDVI harmonic curves, the mean VIs and the amplitude of the harmonics which then were utilized in the identification of the cultivated land, and EVI appeared to be more precise, with the overall accuracies of 97.17% and 95.99% and Kappa coefficients of 0.7938 and 0.6518, respectively.(2) Multiple cropping index was extracted by counting the number of the curve's peak; and when the threshold of the peak value of the NDVI and EVI curves were set as 0.25 and 0.20, respectively, the fallow land could be well figured out.(3) From harmonic curves, some eigenvalues, such as time of the maximum growth rate, time of peak and the value of peak can be extracted, based on which the crop types can be primarily distinguished. And EVI still performed better than NDVI in this section.

结果显示：（1）利用傅立叶谐波变换得到的EVI和NDVI时间谱曲线的谐波余项及谐波振幅对耕地进行识别，从识别精度来看，EVI要优于NDVI，识别精度分别为97.17%和 95.99%，Kappa系数分别达到0.7938和0.6518；（2）通过计算时间序列曲线的波峰数能够提取耕地的复种指数，并且在EVI和NDVI曲线波峰阈值分别设为0.20和0.25时，休耕地能较为准确地被识别出来；（3）通过提取作物生长期内曲线的VI最大增长速率时间点以及峰值时间点等信息，作物种类能被初步识别，并且EVI较NDVI具有更强的识别能力。

The invention discloses a multi-cell pilot frequency distribution method applied in an orthogonal frequency-division multiplexing system, which comprises the following steps: generating at least two different original frequency hopping sequences according to a predetermined pilot frequency domain; generating a combined frequency hopping sequence (having length greater than that of the original frequency hopping sequences) from at least two different original frequency hopping sequences; generating different pilot frequency structures satisfying collision threshold requirements based on the combined frequency hopping sequence; and distributing the generated pilot frequency structures to each cell.

本发明公开了一种多小区导频分配的方法，用于正交频分复用系统，按照预定的导频频域间隔生成至少两种不同的原始跳频序列；将至少两种不同的所述原始跳频序列生成组合跳频序列，所述组合跳频序列的长度大于所述原始跳频序列的长度；基于所述组合跳频序列生成满足碰撞门限要求的不同导频结构；将所述生成的导频结构分配给各小区。

On the ground have a fresh cake story: that women are sweating profusely in a good cake hides a sudden children are crying, another busy Hong Xiaohai, when the big yellow-dog home to a cake smell incense, ran in Diaoqi go visit run outside, women look, rushed to the threshold with an ax will be pulled into a line of cake cut off.

关于糕劲在当地有个故事：说一妇女正满头大汗地揣好了糕，突然孩子哭了，又忙哄小孩，这时家里的大黄狗闻到了糕香，跑进来叼起就往门外跑，妇女一看，急忙用斧子在门槛上将拉成线的糕砍断。

Automotive supplier Lukcyandy production and management company is a large car modification parts automotive supplying base includes operators, including car surrounded by large, car wing / tail, automobile machine cover, auto exhaust pipe, auto balance bar / top bar modification, such as pieces of manufacturers, the project covers the automotive care bar, stainless steel car wheel eyebrow, the threshold of Article vehicle, motor vehicle be decorated windows, automotive fuel tank cover accessories, car guard, car decoration articles, car steering Lighting, automotive LED, HID car and barometer block car, car fender, pedal car with LED Yingbin, car modification at the front lines, well-known automotive spark plugs, automotive performance style, fuel-efficient car accelerator, auto magnetizer, auto rectifier, auto brake conversion, modified car lighting, as well as racing car steering wheel and other car modification products such as accessories include car seat cover, car oxygen bar, auto pedal, auto touch-up painting pens, spray cans of automotive touch-up painting, charcoal car, car perfume, car CD package / CD folder, the first car pillow, car pillow, car solar doll, shaking his head and so on, it supplies include automotive inverter / power converter, car mobile phone charger / car charge, car ashtray, car seat belt / car safety buckle, car foot pad, barometer block car, automotive beauty products contain conservation turtle license, vehicle 3m series, auto tools automotive products such as super-supermarkets, welcome to visit.

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DI is the most ideal irrigation indicator as it is very much influenced by soil water potential and less affected by meteorological factors. DI value of zero is probably the best irrigation threshold. MDS is strongly affected by meteorological factors and requires reference MDS under well-irrigated conditions. RT on the other hand is not significantly related with soil water potential. Therefore neither of these variables is suitable as irrigation index.

DI 受土壤水势影响产生变化的趋势明显并受气象因子影响较小，是最理想的灌溉控制指标，可将 DI =0作为灌溉控制临界值； MDS 受气象因子影响强烈，变异性较大，且需要充分灌溉条件下的 DI 作为参考， RT 与土壤水势的相关性不高，因此均不适合单独作为灌溉控制指标。

The influences of the filler metal powder on the intensity threshold, weld formation and process stability have been studied during high power CO2 laser welding of aluminum alloy through the comparison between welding with and without metal powder.

通过采用和不采用填充合金粉末的比较试验，研究了填充合金粉末对铝合金高功率CO2激光焊接功率阈值、焊缝成形和焊接过程稳定性的影响。

Based on the system of urban road equivalent capacity and density ratio evaluation,this paper presents a novel method to calculate the traffic impact analysis threshold to avoid the defect of traditional methods which adopt a single value(e.g.peak hour trip rate equals to 100 pcu·h-1) without taking different traffic conditions into consideration.

对城市建设项目进行交通影响分析的目的是分析确定建设项目产生的交通量对周边道路交通设施影响的范围和程度，并对项目的审批和建设提出意见和建议，是从需求角度使建设项目的开发与交通设施的供给取得协调一致的重要方法[1]。

For instance, we can derive the knowledge about the chronicle of frontier extension of the US, delve in the disintegration in the course of capitalism development of bucolic human relationship at the threshold of the century, and make sense the susceptiblity of change on the neighboral, familial, relationship.

例如，从中了解美国边疆开拓史；研究美国在本世纪初资本主义发展中田园诗般的人际关系的解体；邻里、家庭、两性关系的嬗变；还有宗教在那一代人的生活中所占的地位和作用，等等。

As PTDT does in threshold traits, PTDT is valid not only for different QTL effect level, but also for maker with multiple alleles and multiple tightly linked markers.(2) Under an appropriate selection ratio s (in this study, s is 0.2, 0.4, 0.6, 0.8, respectively), the power of PTDT can be improved and the genotying individuals can be decreased using selective genotyping design. However, the power of PTDT is related with population size and population structure, an appropriate selection ratio can be defined by simulation based on the existing data.(3) Among the three transforming methods, mixed-family selection is the best, full-sib selection has same power to mixed-family selection in many parameter combinations, and Estimated Breeding Value selection is inferior to them.

数量性状QTL定位的模拟研究结果表明：(1)数量性状经有效转化后，PTDT对数量性状QTL定位保持了阈性状QTL定位的稳健与高效，对不同效应大小的QTL(10％，30％，50％)PTDT都是一个有效的分析方法；(2)在多等位基因标记、多标记方面，PTDT的检验功效与阐性状分析时一样高效；(3)在合适的选择率下(本研究的分别为0.2，0.4，0.6，0.8，1.0)，选择性基因型测定不仅可以减少基因型测定的数量，而且可以提高PTDT的检验功效，但选择性基因型测定的PTDT检验功效很大程度上与群体大小和结构有关，这个可根据具体情况通过模拟找到一个合适的选择率；(4)三种转化方法的转化效力结果表明，家系内混合家系选择的转化效力最高，家系内全同胞选择次之，估计育种值选择的转化效力较差。

The effects of initial electron density Ni and laser pulse width τ on damage threshold fluence Fth were analyzed respectively. Both the nature of multi-photon ionization and the role of avalanche ionization were also discussed.

研究结果表明，对应于一定的脉宽，存在一个临界初始电子密度，当Ni低于这一临界密度时，Fth不受Ni影响；当Ni高于临界密度时，Fth随Ni增加而降低。

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。