There may be zones with different frequencies of the microniches, leading to a zonation in distribution of the species or to trends in species frequencies . 還可能存在著微生境頻率不同的帶,導致了該數種分布的成帶現象,或導致了該樹種在頻率上的各種趨勢。
Algorithms of video segmentation that are good adaptive character and real time are crucial to the final mpeg 4 coding products there exist the contributions in this dissertation as follows obtaining the edge of video objects is crucial to the video segmentation , author researches the features of human being visual , especially giving a description of mach band that is usually used in the image processing , and builds a model of mathematics , researching the mach band of color image ( 1 )視頻分割的關鍵是獲得視頻對象的邊界,邊緣檢測很重要,本論文以人類的視覺系統的特性為出發點,對圖像處理中經常應用的馬赫帶現象進行了詳盡的分析并進行了數學建模,研究分析了彩色圖像的馬赫帶現象。在對馬赫帶圖像分析的基礎上,得出了人類視覺系統對圖像邊緣能識別的最小灰度差和彩色差曲線。
The microscopical observation proves that the main types of granitoid rocks are granodiorite and quartz monzodiorite , and the enclave is mainly monzodiorite . the rock - forming minerals are mainly k - feldspar , plagioclase , amphiboie , biotite , quartz , magnetite , titanite , apatite , epidote , etc . the zonation of the feldspars is very popular . the dark - colored minerals , such as biotite and titanite , have been highly oxidized 通過對本區花崗巖類樣品進行顯微觀察研究,知其主要的巖石類型為花崗閃長巖、石英二長閃長巖,其中的巖石包體主要為二長閃長巖,其造巖礦物為鉀長石、斜長石、角閃石、黑云母、石英、磁鐵礦、榍石、磷灰石和綠簾石等,長石中環帶現象比較常見,黑云母、榍石等暗色礦物顏色較深,表明其氧化程度較高。
The smaller convective patch corresponds to slight changes of maximum mean wind speed and the larger convective patch corresponds to the waves amplifying , the intensity of the inward propagation of vorticity strengthening distinctly , the amplitude of velocity change increasing and the period longing 初始擾動尺度減小,渦旋rossby波減弱,對tc強度增強作用減弱;擾動尺度增大,波動增強,向內傳播的渦量顯著增大,但轉化為渦量帶現象變化不大,風速變化的震蕩性增強。