natural number 中文意思是什麼

natural number 解釋
【數學】自然數。

  • natural : adj 1 自然界的；關于自然界的。2 天然的；未開墾的；野生的。3 固有的 生來的 天賦的（opp acquired）...
  • number : n 1 數；數字；〈pl 〉算術。2 （汽車等的）號碼；第…，第…卷，第…期〈通常略作 No （復數 Nos ），用於...
  1. Test method for acid number empirical of synthetic and natural waxes

    合成蠟和天然蠟的酸值
  2. Natural rubber latex concentrate - determination of volatile fatty acid number

    揮發脂肪酸值的測定
  3. The results showed in the paddy field the bacteria were predominated, in the dry land the proportion of fungi and actinomyces was distinctly higher than the other two kinds of soil, in the woodland abundant species of basidiomycetes were found ; the natural degradation speed was low, with the degradation the number and composition of microorganisms changed regularly ; when the c / n ratio was adjusted to 25 " ? 1, the degradation remnant ratio reduced 10. 67 % than the control

    結果表明，水田以細菌為主，旱地中真菌和放線菌數量最多，林地中有大量的高等擔子菌；秸稈自然降解較慢，土壤微生物也隨著降解的進行而呈現一定的變化規律；當調節c / n比為25 ： 1時，秸稈的腐解殘留率比對照組下降10 . 67 。 2
  4. Seven plots selected from wanglang reserve were distributed in different types of forest and at different altitude, and different plot has different microclimate. soil property, microbial population, soil nutrient content of forest soil were determined in wanglang natural reserve, from may to october 2002 to july 2003, the ecological distribution of three main groups, bacteria, actinomycete and fungi were determined in the forest soils by the cell enumeration methods. six kinds of physiological groups, including ammoniation bacteria, nitrification bacteria, nitrosification bacteria, aerobic autogenesis azotobacter, aerobic cellulose - decomposing bacteria and anaerobic cellulose - decomposing bacteria were enumerated by the most - probable number ( mpn )

    2001年10月在王朗自然保護區內設立了3個定位研究樣地和4個臨時樣地，通過多次現場采樣與室內實驗分析，測定了白樺林、岷江冷杉林、紫果雲杉林、繡線菊-羊茅群落、羊茅群落及高山柳灌木叢等6種不同植物群落內土壤微生物三大類群數量、功能微生物數量、土壤養分，並在固定樣地內使用埋袋法進行了三個埋藏深度的凋落物分解袋試驗，初步研究了枝條、闊葉、針葉等凋落物組分在不同分解階段所含養分的動態變化。
  5. The natural bornite has stains and spots on the surface, showing a beautiful picture against a golden yellow background. yunnan tea is finely made, good in quality, and has a good assrtmnent. popular products include dianhong, dianliu, puercha, tuocha and qizhibing. the city of spring plants many varieties of flowers all the year round. now total number amounts to 400

    在雲南民族村裡，吉祥的傣寨白塔，壯觀的白族大理三塔，高聳的彝族圖騰柱，源遠流長的納西東巴文化，佤族的木鼓布朗族的婚俗基諾族的太陽鼓拉祜族的蘆笙舞奇特的摩梭人母系社會形態驚險的傈傈族上必杜活動以及風趣的亞洲群象表演，精美獨特的民族風味美食，會令您陶醉其中，流連忘返。
  6. At first, this research summarizes and analyzes the natural zoology conditions, such as district ’ s boundary, geography position, climate characteristics, geologic and appearance, soil, vegetation and so on, social economy, the whole developing situation of the stockbreeding in the yellow river delta area. the result is : the yellow river delta is the area with a specific zoology system and rich natural resource. the proper geological environment, favorable climate conditions offer the advantaged conditions for the growing of pasture and feedstuff, the big superficial natural and artificial grass land and a large number of cropper straws establish a good material base for the vegetarian especially for sheep

    1 、通過對黃河三角洲地區的區域界定、地理位置、氣候特徵、地質地貌、土壤植被等自然生態條件，以及社會經濟狀況、畜牧業整體發展情況進行分析，結果表明:黃河三角洲是一個具有獨特生態系統和豐富自然資源的地區，該區特有的地質環境、良好的氣候條件為牧草及飼料作物的生長提供了有利條件，大面積的天然草場和人工草場以及大量的農作物秸稈為食草家畜，特別是羊的大發展奠定了良好的物質基礎。
  7. The natural science foundation of china ( " nsfc " ) has played a key role in promoting and supporting the center. the center promotes interdisciplinary and international collaborative research with focus in functional genomics, exocrine physiology, reproductive biology, immunology and new drug development ( including tcm ). the center has gained the support of nsfc, rockefeller foundation, the research grants council and it fund on a number of collaborating programmes

    該中心提倡跨學科研究和國際合作，研究重點是與上皮相關的功能基因研究，外分泌生理學、生殖生物學、免疫學及藥物開發（包括中草藥） ，並已獲國家自然科學基金委員會、美國洛克菲勒基金會、香港研究資助局、創新科技署等支持開展多個合作項目。
  8. Traditional sports and folk sports are of great variety, which may be used as pe resources. but such contents are absent in the pe textbooks. so it is natural that the pe classes can not arouse interest of students ; the number of the playground and sports apparatus can not meet the standard. neither can they satisfy the demand of students ; it ' s practical to take advantage of the local geographical resources in pe curriculum ; extracurriculum and after - school activities can not meet the demand of students, which should be developed and utilized to a greater extent ; the structure of pe teachers is far from satisfactory

    結果顯示，甘肅少數民族地區小學體育課程資源存在著課程內容中民族傳統體育和民間體育活動項目豐富，然而教材內容沒有考慮地方和實際情況，很難引起學生的興趣；各級各類學校體育場地、器材的要求相差甚遠，現有體育場地器材都無法滿足教學要求和學生的體育需求；自然地理財富作為一種體育課程資源來開發很具有價值和實際意義；課外體育活動和校外體育活動還不能滿足學生的需求，尚須大力開發和利用；體育師資結構不合理，學歷結構偏低，且相當一部分是民辦教師轉正等問題。
  9. But continuously for a long time hence, the society will exuviate, though science is flourishing, the living environment number comfort, be unequal to nature also also equally advanced have no natural disaster and man - made calamity

    但是長此以往，社會就會蛻化，盡管科學發達了，生活環境舒適了，但並不等於自然界也同樣先進了就沒有了天災人禍了
  10. Firstly, a natural number chaotic sequence is created with the key. then the image matrix is transformed with this chaotic sequence, using the magic cube transformation. the results indicate that the proposed algorithm can get a satisfying effect

    提出了一種在小波域內的基於混沌序列的模運算數字圖像加密解密演算法和基於混沌序列的魔方變換數字圖象加密解密演算法。
  11. The distribution law of prime number in natural number

    關于正整數數列中素數的分佈規律
  12. Application of natural number coding genetic algorithm for image correlation matching

    演算法的車牌圖像快速匹配
  13. Natural number k power sum once

    次冪和的討論
  14. " beyond core knowledge : natural number. " chap. 7 in the origin of concepts

    核心知識之外：自然數。選自《概念之源》第七章。
  15. Application of modified natural number - coded genetic algorithm to vehicle scheduling problem with time windows

    一種改進的自然數編碼遺傳演算法在非滿載時間窗車輛優化調度問題中的應用
  16. David mertz thinks that if there are any uninteresting natural numbers, there must be a least such uninteresting number

    David mertz覺得如果存在一些令人厭倦的自然數，那麼一定有一個最小的這樣的自然數。
  17. In the 19th century, though, nature and philosophy went their separate ways as the natural philosophers grew in number, power and influence

    而到了十九世紀，隨著自然哲學家們在其數量、知識能力與影響力上的增強，自然學科與哲學就分道揚鑣了。
  18. 3. a number of test parameters of insulation, position of reflux pipe inlet arrangemts, injection etc. are explored in the experiment. the experimental results demonstrate that the natural circulation is an efficient way to precool the pump system and maintain it at cryogenic temperatures

    進行了多組對比實驗，著重對兩種不同迴流方式對于自然循環和預冷的影響進行了比較，並研究了系統增壓、引射、迴流管絕熱效果以及泵體絕熱效果對于自然循環的建立和維持以及對循環預冷效果的影響。
  19. This article used natural number encode, and did feasibility analysis. in connection with premature in genetic algorithm, this article adopted self - adapting adjustment crossover and mutation probability methods, and did simulation

    本文採用自然數編碼的方式，並分析了可行性；針對演算法優化中出現的「早熟」現象，提出了採用自適應交叉、變異概率法，並進行了模擬。
  20. In the optimal calculation of pipe networks, using genetic algorithms to optimize, by natural number coding. then this thesis simply discuss the selection of initial genetic colony and the reasonable value of penalty function multiplier. it improve the constringency speed of genetic algorithms

    在管網優化計算部分，採用遺傳演算法，用自然數編碼的方式進行遺傳優化，對初始種群的優選，適合度函數中懲罰因子的取值，作了初步的探討，提高了遺傳優化的收斂速度。
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