低频

Methods A method combining pulsed field gel electrophoresis with low-frequency-cleavage restriction endonucleases was established to analysis DNA of Enterobacter cloacae.

方法利用脉冲场凝胶电泳结合低频限制性内切酶技术对阴沟肠杆菌染色体DNA进行分析。

Source images with wavelet are decomposed, and corner information can be detected in the two approximate sub-images on the wavelet coarsest level. The initial registration parameters are achieved through affine transform model. The optical flow is iteratively refined to get the coarse registration parameters. The process will continue until the final and accurate matching parameters are obtained.

首先对源图像进行小波分解，在小波金字塔最顶层的低频近似子图像上进行角点检测，通过仿射变换模型得到初始配准参数；然后将这一参数逐层进行迭代精炼，直至达到金宇塔最底层，得到最终精确的配准参数。

Interconnection are ac complished, including the analysis of th e low frequency oscillations and

年全国大同步联网方案中的低频振荡和暂态稳定性分析，2030 年全国纯直流联

They experimented with the effects of "artificially induced ionospheric depletions on very low frequency wave lengths, on equatorial plasma instabilities, and on low frequency radio astronomical observations over Roberval, Quebec, Kwajelein, in the Marshall Islands and Hobart, Tasmania" Advanced Space Research, Vo1.8, No.

他们实验&在近赤道离子不稳定区域以甚低频波长人工诱导电离层损耗，或者对魁北克罗伯威尔、马绍尔群岛桂哲林和塔斯马尼亚州霍巴特的低频无线电天文观测&（《高级太空研究》，卷1.8，1号，1988）。

Plant currently has more than 300 employees, is 200,000 per month switching power supply units, electronic transformer 200,000 units, various types of dimmers and low-frequency transformers, Total 500,000 Taiwan.

工厂目前有300多员工，现月产开关电源20万台，电子变压器20万台，各类调光器及低频变压器，合计50万台。

E. , approximately four months; 2 the active periods occur much longer than the non-active periods; the main climatic characteristics of the non-active periods, compared with the active periods, is weaker monsoon with westerlies at 850-hPa and easterlies at 200-hPa on the deviation fields of circulations over the SCS (active time minus non-active time); it is warmer in the active periods than in the non-active periods at lower and upper levels; 3 in most circumstances, the low frequency vibrations of the summer monsoon and its rainfall are quite in phase.

2其中活跃期出现时间要比非活跃期长的多。与活跃期相比非活跃期主要气候特征表现为季风的减弱，在环流的偏差场上在南海上空850hPa上为西风，200hPa上为东风，活跃期高低空都比非活跃期要暖一些。(3)在多数情况下夏季风和夏季风降水的30-60天的低频振荡比较一致。

The World Health Organisation factsheet on ELF EMFs and cancer concludes that they are "possibly carcinogenic", based primarily on IARC's similar evaluation with respect to childhood leukemia.

世界健康组织公布了极端低频电磁辐射的新闻，结论是他们可能是致癌的，主要基于国际癌症研究机构关于儿童白血病的相似评价。

To meet with the DC feeder cable without ground wiring, different DC current method was proposed to solve the problem of DC leakage curren on-line detection of the cable. The paper still studied in primary the feasibility of low frequency superposition method to detect the DC feeder cable. It not only explained the working theory of the system, but also presented some problems to be solved.

针对直流馈出电缆无接地线，提出采用差量直流电流法解决了电缆直流泄漏电流的在线检测问题，并初步研究了低频叠加法监测直流馈出电缆的可行性，给出了工作原理及还需解决的问题。

PDA(particle dynamics analyzer system) was used to measure the flow velocity of particles in the XFD-12 flotation cell, the results show that tangential mean velocity in the radial direction changes from positive to negative in the flotation cell, naught point emerge in the medium of the radial direction ,it is where backward fluid emerge ,shear stress of backward fluid induce the particle detachment from bubbles .

汁算数据与实际矿石筛析结果都表明，紊流强度增大，泡沫中粗粒级含量减小。 4。用PDA在XFD-12型8L浮选机中测定的速度值，进行混合区、分离区、泡沫区紊流运动功率谱计算，得紊流脉动频率，混合区小于20Hz，分离区在20-30Hz之间，泡沫区在25-35Hz之间，浮选槽内紊流脉动以低频为主，且紊流脉动动能是混合区大于分离区大于泡沫区。

The merged high frequency coefficients come from the high frequency coefficients of the histogram matched panchromatic image with the proposed fusion method, while the fused low frequency coefficients are obtained according to the fusion rule suggested in this paper.

该方法将直方图匹配后的全色影像的高频系数作为融合后的高频系数，而融合后的低频系数依据新提出的融合规则得到，最后采用小波逆变换与逆IHS 变换获得融合图像。

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。