density differences 中文意思是什麼
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Previous researchers have always determined the sp atial distribution patterns ( sdp ) of castanopsis kawakamii with a sample - dis tance method. however, the distribution patterns may be affected by the quadrat si ze and, in the course of analysis, the density differences among the cluster plots are not considered ; therefore, differences of cluster plot size and the dispersi on degree among individuals of cluster plots can not be known. authers of this pa per have determined the spatial distribution patterns of castanopsis kawakamii population in different habitats by means of non - quadrat distance method and a nalysed the pattern intensity and grain of the sdp. the pattern intensity is defi ned with the relative density differences and the pattern grain can embody the d ispersion degree of the individuals in the plots, and the dispersion degree among the plots. the determined results are as follows. the intensities of the species range in order from strong to week : litsea mollifolia p. kawakamii i. purpure a r. cochinchinensis c. kawakamii c. carlessii d. oldphamii s. superba. the gra ins of the species queue in order from coarse to close : s. superba = litsea mollif olia r. cohinchinensis c. kawakamii = i. purpurea c. carlessii p. racemosam d. oldp hamii. these determined results tally basiclly with the results authers of this paper have got in determining the same plots by means of aggregate index access ing method. in view of this, it is held that the sdp of c. kawakamii is closely related to the habitats and biological features
前人都是採用樣方方法對格氏栲種群數量的空間格局進行測定，而格局分佈有可能受樣方大小的影響，且分析過程中沒有涉及聚塊間密度差的問題，因而無法掌握種群的聚塊大小差別及聚塊內個體間的離散程度.本研究採用無樣方距離法，測定不同生境的格氏栲種群空間格局，分析格氏栲種群格局的強度和紋理.強度以聚塊和間隙的密度差來定義，紋理則是體現聚塊內個體間的離散程度與諸聚塊間的分離程度.測定結果表明，格氏栲種群格局強度從高到低排列次序為：木姜子蚊母樹冬青茜草樹格氏栲米櫧虎皮楠木荷；格局紋理從粗到細的順序是：木荷=木姜子茜草樹格氏栲=冬青米櫧蚊母樹虎皮楠.這一測定結果與作者採用聚集度指標測定相同樣地格氏栲種群空間格局的結果基本相符.因此，格氏栲空間格局類型及分佈與格氏栲生物學特性及生境的關系密切 -
Further qualifications require that the two fluids be miscible and that the density difference be a function of differences in temperature.
另外的條件要求兩種流體可以摻混起來，並要求兩種流體的密度差是溫度差。 -
To conduct a more thorough analysis of the lakes named 90 e and sovetskaya the team drew on a suite of data including new satellite images and decades - old gravity measurements which use differences in the density of ice and water to gauge a lake ' s depth
E湖與sovetskaya湖，是由美國哥倫比亞大學科學家robi領導的研究小組，利用最新的衛星影像測高與透冰雷達資料，首次估算出它們的大小及深度，結果發表在2月份的geophysica -
Bivalve density in east tangsun lake was maximal while that in niushan lake and longgan lake were minimal. insect density in east tangsun lake was maximal but that in huang lake was minimal, and the differences of them among three lakes were distinct ( p 0. 05 ). zoobenthic density in east tangsun lake was maximal but that in huang lake was minimal, and the difference in two lakes was distinct ( p < 0. 05 )
在密度方面，寡毛類以龍感湖最高，牛山湖最低，且兩湖差異顯著（ p 0 . 05 ） ；牛山湖螺類明顯比其它三個湖湖泊高（ p 0 . 05 ） ；雙殼類以東湯孫湖最高，牛山湖和龍感湖最低；水生昆蟲以東湯孫湖最高，黃湖最低，且東湯孫湖與龍感湖和黃湖差界顯著（ p 0 . 05 ） ；底棲動物總密度以東湯孫湖最高，黃湖最低，且兩湖差異顯著（ p 0 . 05 ） 。 -
There are no differences of soma size and cell density in the labeled neurons in the area x. the song control nuclei of emberiza rutila have more intense chat - li than that of fringilla montifringilla
栗? hvc和ra內chat樣免疫反應明顯強于燕雀，表明鳴囀能力的不同與免疫反應的種間差異之間具有一定的相關性。 -
3. the frequency differences are determined by both the power spectral density ( psd ) and cepstrum of ambient vibration measurements. a matlab - based toolbox is developed, in which the differences of the higher adjacent frequencies can be easily evaluated
3 .使用功率譜頻差法和倒頻譜頻差法，開發了基於matlab平臺的斜拉索環境振動基頻識別gui工具箱。 -
The results showed that the differences of leaf thickness, cutin layer thickness, stockade tissue thickness, sponge tissue thickness, ratio of stockade tissue thickness to sponge tissue thickness, tightness of leaf tissue structure, sedimentation of leaf tissue structure and stoma density were significant, while the differences of the sizes of upper epidermis and lower epidermis were not
葉片厚度、角質層厚度、柵欄組織厚度、柵欄組織與海綿組織厚度的比值、葉片結構緊密度和氣孔密度等值越大的含笑，受旱危害愈輕，其抗旱性就越強。 -
Secondly, we numerically simulate the turbulence behavior of one - dimension fpu model and obtain probability density functions of the velocity differences in different conditions. we use tsallis statistics to fit the probability density functions and find out it was fitted very well
其次，我們對一維fpu模型中類似湍流行為進行了數值模擬，得到不同條件下速度差的概率密度函數，並利用tsallis統計對其進行擬合，發現兩者符合得非常好。 -
The experiments reveals that : the amount of water vapor transfer is affected by both water content gradient and the value of water contents, when the water content of one end is approximate, the water content gradient increases, then the amount of water vapor transfer increases ; when the water content gradients are approximate, the amounts of water vapor transfer can get great differences if the water contents are different, under this condition when the water content of the dry soil is very little, the amount of water vapor transfer is much greater ; the differences of density hav n ' t great effects on water vapor transfer, but have some effects on the admixture transfer, when the density is smaller, the amount of admixture transfer is greater. the water vapor transfer finishes more quickly and need less time, and the liquid water finishes more slowly and need less time
當一端含水量一定時，增加含水量梯度，則氣態水遷移量增大；當含水量梯度相近時，氣態水遷移量隨含水量不同可能相差很大，這種情況下當較干段含水量特別小時，氣態水遷移量相對較大；密實度的大小對于氣態水遷移的影響並不明顯，但對液態水和氣態水的混合遷移有一定的影響，在相同的實驗時間內，土體密實度較小，則混合遷移量相對較大；氣態水遷移完成速度較快，所需時間較短；液態水遷移完成速度較慢，所需時間較長。 -
For most " soft " tissues in the body, the proton density is very homogeneous and therefore does not contribute in a major way to signal differences seen in a image
對于身體中大多數的「軟」組織，由於質子密度非常均一，在影像上沒有方法來區別這些組織的信號。 -
Here, aba - induced h2o2 generation and their roles in inducing stomatal closing were investigated by epidermal strips bioassay, laser scanning confocal microscopy and patch clamp with ios5 and its wild type plant as materials. there were no clear differences between wild type and ios5 in the density, shapes and aperture of their stomata
本文以los5及其相應野生型為材料，採用表皮條生物分析、激光掃描共聚焦顯微技術及膜片鉗技術研究了nacl脅迫條件下， aba誘導保衛細胞內h _ 2o _ 2的產生及二者在誘導氣孔關閉中的作用。 -
Several influence factors to result plasma drift in hainan were analyzed. in this paper the characteristics of ionospheric parameters variation were analyzed systematically and some new results in storm - time such as seasonal behaviors were obtained ; it is the first time to investigate the ionospheric drift behavior in hainan and some new results was obtained, the relationships between each two plasma drift velocity components in storm time in hainan were found and the electric filed variation in hainan ionosphere also was obtained ; the results also show that there are big differences of the ionosphere parameters bo and bl obtained from the data with that obtained from the iri - 2001 applied for hainan ; a new phenomena was found during a strong magnetic storm, that a layer with very strong electron density and density grad was found during the recovery phase of the storm, its horizontal scale is beyond 100km and temporal scale is about 2 hours, this phenomena repeated 3 times continuously. a type of negative disturbance in high and low latitude but positive disturbance in east - asia also has been found
本文較為系統地給出了海南地區電離層的參數變化特徵，特別是得到了一些暴時與以往不同的季節特性；第一次給出了海南地區的電離層等離子體漂移特徵，發現等離子體漂移暴時擾動在三個方向上有內在的聯系，得到了電場變化曲線；研究結果還表明海南電離層的半厚指數和形狀參數等與國際參考電離層iri - 2001存在很大差別；通過對強磁擾動事件期間的參數變化特性分析發現，在磁暴恢復相期間海南地區電離層底部存在一個電子密度非常大的高密度區，高密度區底部電子密度梯度隨高度急劇增加，該區域的水平尺度可達100公里以上時間尺度約為2小時，連續出現過三次，這是一個在海南從來未發現的新現象；研究還發現了暴時東亞地區電離層擾動會出現高低緯負相而中緯正相的現象。 -
These differences are connected with the nonlinear relationship between potential and density and the strong absorption of the composite projectiles.
這些差別與電勢和密度之間的非線性關系有關，也與復雜的入射粒子的強烈吸收有關。 -
Thirdly, based on a comparative analysis of urbanization level, space density, municipal utilizes development, and a number of economic and technical data in property development and building industry in east, west and central china, it is concluded that there are tremendous differences in building industry between the west and the east area ; gaps in urban and rural construction and development between the west and east area are embodied by urbanization level ; construction and building industry occupies a protruding position in western economy, but industrial efficiency, technological and equipment level are weak links hindering further development and competition of the region ; the extent to which the real estate market develops is a sever barrier to normal development of property industry in western region
第三，在社會經濟發展比較的基礎上，界定了東西部建設行業技術經濟比較的范疇及指標體系，通過對東、中、西部城鎮化水平、空間密度、城市首位度、城市市政公用設施建設水平和房地產、建築業發展指標等技術、經濟數據的比較、實證分析，筆者得出了東西部地區在建設行業發展上存在較大差異，東西部地區城鄉建設和發展差異主要表現在城鎮化水平上；建築業在西部經濟中佔有突出地位，但行業效益和技術裝備水平是進一步發展和競爭中的薄弱環節；房地產市場的發育程度嚴重製約著西部地區房地產業的正常發展等主要結論。
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