zone n. 1.【地理】(地)带。 2.区域,范围,界。 3.〔古、诗〕(腰)带。 4.圈,环带。 5.【数学】(球面)带;【物理学】晶带;晶层。 6.〔美国〕(为计算邮包寄费而划分的)邮包区 (= parcel post zone)。 7.【自动化】(穿孔卡片顶部的)三行区。 the frigid [temperate, torrid] zone 寒[温、热]带。 a fortified zone 要塞地带。 the zone of action 作战区域。 a school [business, residence] zone 学校[商业、住宅]区。 the zone of influence 势力范围。 soil zone 土层。 in the zone 〔俚语〕处于颠峰状态。 loose the maiden zone of 破坏…的处女童贞。 zone out (使)变得昏头昏脑,(使)变得昏昏沉沉。 vt. 1.用带圈绕。 2.把…分成地带。
frequency n. 1.屡次,频仍,频繁。 2.(脉搏等的)次数,出现率;频度;【物理学】频率,周率。 audio frequency音频。 a high [low] frequency高[低]频。 the frequency of earthquakes in Japan 地震在日本的频繁发生。 mean [median] frequency中频。 resonance [resonant] frequency谐振频率,共振频率。 ultrahigh frequency超高频。 ultralow frequency超低频。 very high frequency甚高频。 very low frequency甚低频。
Through the analysis attributes inof time and frequency zone , we can find when the thickness is less than / 4 the relationship between thickness and attribute is liner 通过常用的时频域分析,可以看出,属性与地层厚度在调谐厚度内时近似的呈线性关系。
The research results show that the frequency zone is very wide during deformation and fracture process of loaded coal , the main frequency zone is changed with load change ; at the initial stage of the load the main frequency zone of eme is low , and sometime it takes on the trend from raise to drop ; at the later stage of the load the main frequency zone of eme is high , and its trend is that the larger the load is , the higher the main frequency zone is 研究结果表明,在受载煤体变形破裂过程中电磁辐射的频带很宽,其主频段随载荷的变化而发生变化,在受载初期,电磁辐射的主频带较低,电磁辐射主频带有时呈现先增高而后降低的趋势;在受载后期,电磁辐射的主频带较高,基本上表现为载荷越大,电磁辐射的主频段越高。