自然數集 的英文怎麼說
中文拼音 [zìránshǔjí]
自然數集
英文
the set of all natural numbers-
In this paper, based on land use maps of 1976, 1988, 2003, which were interpreted from the landsat mss / tm / etm imageries, and the map of main road, with the buffer analysis tool in arcgis 8, we studied the land use and land cover change on the two sides of the main roads in xishuangbanna, then we studied the impact of population density and the topographic factor on road effects. during the study both the comprehensive land use dynamic degree model and the land use degree comprehensive index model are taken into account, we put forward a compensatory model ? “ amendatory comprehensive land use dynamic degree model ”
由於人類活動干擾強度加大，公路效應深度不斷擴展， 1976年為5km ， 1988年為7km ， 2003年達到11km ;受自然、社會條件的影響，不同路段的公路效應存在較大差異，甚至同一路段兩側效應也各不相同。 1976年至2003年，距公路不同距離范圍內的人口密度都在增加，且距離公路越近，人口數量密度越大、增長越快，人口分布有向公路兩側聚集的趨勢。選取人口密度為大、中、小三個樣區分別分析公路效應的范圍表明，人口密度The first part is the preface. in this part, i have made a general introduction of dai ethnic minority in xishuangbana dai antonymous region, such as the important position, the unbalanced social and economic developments, and the abundant natural resources. meanwhile, i have also talked about the characteristics of the ethnic relations between dai ethnic minority group and other ethnic ones, which contain the location, the sense of the same origins and cognitions and so on
本文共分為七部分：第一部分為緒論部分，主要介紹了西雙版納民族地區的大體概況（地處邊疆、戰略位置重要；社會、經濟發展不平衡；自然資源豐富）及西雙版納傣族自治州各民族關系特點（大雜居，小集居，立體分佈；共同的歷史淵源和族群認同感；民族關系的核心是漢民族和少數民族之間的關系；民族關系發展的不平衡） 。A mixture of emotions flooded the author ' s soul, from fear to sympathy for the caribous ' impending doom and exhilaration from witnessing one of natures plays unfolding in front of his eyes
我百感交集，既哀憐馴鹿之劫數難逃，又樂于親眼見證此自然法則之游戲開場The natural factors of the ground subsidence include crustal movement, geological structure, geology, physiognomy, and hydrology, etc. the human factor includes excessive exploitations of fluid resources, such as groundwater, etc. in the sixth part, the collection and management of data, the establishment and management of the database, and the protraction and usage of related maps in the research of ground subsidence were introduced and discussed
地面沉降影響因素包括地殼運動、地質構造、地貌、氣候和水文等自然因素，以及過量開采地下水等人為因素。第六部分從數據的收集、整理、數據庫的建立和管理及有關圖件的繪制及應用等方面對gis在地面沉降研究應用作了介紹和探討。Orient zirconic is an non - government owned hi - technology enterprise, the natural shareholder contains 75 % and 25 % is owned by guangdong shaoguan energy sources group co., ltd
公司屬於民營高科技股份公司，自然人股份占總股份數的75 % ，法人股份佔25 % ，其中廣東韶能集團股份有限公司（上市公司）是我公司法人股東之一。First, a government statistics report has shown that the subject choices for college majors by female students are mainly concentrated in education, arts, humanities, home economics, tourism, and mass communications - areas traditionally dominated by women. the subjects of engineering, natural sciences, mathematics, computer science, transportation, electronic communications, architecture, urban design, and law, are still dominated by male students
首先，從大學階段女生所就讀的科系來看，政府的統計報告顯示，主要還是集中在教育藝術人文家政觀光服務大眾傳播等學門，工程自然科學數學及電算機科學運輸通信建築及都市規劃法律等領域，依舊是男生的天下。In light of current using situation and drawing on the experience of many scholars researched methods and viewpoints, this thesis made com land, fallow land, orchard, grass land as experimental field in black soil region jlau, which carried out experiment by applying different amounts of n and p fertilization in corn field. by means of collecting the samples of rainfall runoff, erosion silt and surface layer soil before and after rainfall for one year nature precipitation in field, we study the effect of surface runoff on n and p nutrient and fertility degeneration. the results showed : ( l ) there are lots of factors which affect soil erosion and losses of n and p, in which rainfall and rainfall intensity were more important, while rainfall intensity is the most important meteorological phenomena factor
針對當前黑土利用現狀，本文借鑒眾多學者的研究方法和觀點，在吉林農大黑土區選擇利用方式不同的玉米地、休閑地、果園、草地，在玉米區進行了不同數量的施肥，通過野外試驗，採集一年自然降雨產流及泥沙樣品，同時採集降雨前後的耕層土壤樣品，研究了黑土區地表徑流對氮磷養分特徵及肥力退化的影響，結果表明：土壤侵蝕和氮磷的流失受諸多因素的影響，降雨量、降雨強度是重要因子，而降雨強度是影響農田地表徑流養分流失的最重要的氣象因子，特別是暴雨，暴雨徑流中氮磷濃度較平時高得多；隨作物生長，覆蓋度逐漸增加以及不同利用方式下表現的覆蓋度差異，氮磷流失都表現為顯著的差異。In this article, the shp measure system based on the hardware of pci - 9114 ( daq ) and coordinator u511 is developed in vc + +. this system is good at getting the pressure data in the space mesh and processing it into velocity, total and static pressures and the field picture
本文通過vc + +開發了數據採集和處理一體化的基於pci - 9114數據採集卡和u511坐標控制器的七孔探針測試系統，該系統能自動採集空間網格點上的壓力數據，然後處理成所需的速度和總靜壓數據，並完成初步的流場繪圖。Over the next three years, wwf will increase their focus on marine issues, in particular the status of hong kongs fish stocks
于未來3年，世界自然基金會將集中研究有關保護海洋環境的事宜，更會集中研究香港的海魚數量。In this text, we first do some research on the genetic algorithm about clustering, discuss about the way of coding and the construction of fitness function, analyze the influence that different genetic manipulation do to the effect of cluster algorithm. then analyze and research on the way that select the initial value in the k - means algorithm, we propose a mix clustering algorithm to improve the k - means algorithm by using genetic algorithm. first we use k - learning genetic algorithm to identify the number of the clusters, then use the clustering result of the genetic clustering algorithm as the initial cluster center of k - means clustering. these two steps are finished based on small database which equably sampling from the whole database, now we have known the number of the clusters and initial cluster center, finally we use k - means algorithm to finish the clustering on the whole database. because genetic algorithm search for the best solution by simulating the process of evolution, the most distinct trait of the algorithm is connotative parallelism and the ability to take advantage of the global information, so the algorithm take on strong steadiness, avoid getting into the local
本文首先對聚類分析的遺傳演算法進行了研究，討論了聚類問題的編碼方式和適應度函數的構造方案與計算方法，分析了不同遺傳操作對聚類演算法的性能和聚類效果的影響意義。然後對k - means演算法中初值的選取方法進行了分析和研究，提出了一種基於遺傳演算法的k - means聚類改進（混合聚類演算法） ，在基於均勻采樣的小樣本集上用k值學習遺傳演算法確定聚類數k ，用遺傳聚類演算法的聚類結果作為k - means聚類的初始聚類中心，最後在已知初始聚類數和初始聚類中心的情況下用k - means演算法對完整數據集進行聚類。由於遺傳演算法是一種通過模擬自然進化過程搜索最優解的方法，其顯著特點是隱含并行性和對全局信息的有效利用的能力，所以新的改進演算法具有較強的穩健性，可避免陷入局部最優，大大提高聚類效果。In 2003, the agriculture, fisheries and conservation department conducted two surveys on the population and distribution of wild house crows in hong kong. the results indicated that about 200 house crows were found mainly in sham shui po and kowloon city areas
（一）在二三年，漁農自然護理署就野生烏鴉的數目及分佈進行了兩次調查，結果顯示烏鴉主要群集於深水?及九龍城兩區，為數約二百隻。Each season here has its beauty : bright flowers in full bloom covering the green slopes in spring, spectacular summer thunderstorms which are rarely seen elsewhere, blue rivers running across the mountains overlaid with red maple leaves in fall, and snow - capped mountains and frosted pine trees in winter that stage a quiet solemn spectacle of particular interest. on a clear day one can see the peaks rising one after another. when the sky is overcast, the horizon disappears into a sea of clouds. mount tai is most famous for its spectacular sunrise and sunset. its landsacpe and numerous historical sites have inspired many great classics of ancient writers, scholars and calligraphers. mount tai has long been the preferred gathering place of artists and poets
泰山的每個季節都有獨特的魅力.春天，綠茵茵的山坡上，爭奇斗艷的花朵到處可見.夏天，泰山的雷暴雨堪稱奇觀. .秋天，楓樹葉漫山遍野，蔚藍色的河水穿流而行.冬天，雪蓋群峰松披霜，景觀素雅悲壯，別有一番情趣.喜逢艷陽日，極目遠眺，重巒疊嶂，盡收眼底.但遇天陰時，環顧四周，蒼茫大地，盡入雲海.泰山的日出與日落，聞名遐邇.壯觀自然風景以及不可計數的歷史名勝，激發了古代文人書法家，為之舞文弄墨，創作了無數經典佳作.泰山歷來是畫家與詩人鐘情的聚集地Mr ip s choice for the time capsule was a set of a dvd and a vcd of two documentary tv series jointly produced by the observatory and rthk. these are of historical significance as they are milestones of the observatory s effort to reach out to the public and to promote the importance of preparedness against natural disasters
葉先生特別選取置於時間囊的物品，是分別屬于兩輯電視記錄片集的數碼影碟（ dvd ）和影音光碟（ vcd ） ，片集由天文臺與香港電臺聯合製作。推出這些記錄片集，正好顯示天文臺竭力為市民大眾拓展各種服務，以及推廣就自然災害作好準備的重要性。Based on the pilot studies on the evaluation index system and the method of sustainable development on loess plateau, this paper has designed the structure frame of the index system including three types of index including one advanced comprehensive index - the comprehensive index of sustainable development, five basic indexes and thirty element indexes, the analytic hierarchy process which can be used to calculate the sustainable development index weight supported by entropy technology. the model can be used to evaluate the sustainable development of loess plateau comprehensively integrated by mathematical method such as compositive appraisement method of hierarchy multilayer 、 main component analytical method 、 regression analytical method and so on. pilot study on the index system has been carried out on the leoss plateau of the northern shaanxi, and the results is promising
通過對黃土高原可持續發展評價指標體系和方法的初步研究，設計出了包括1個高級綜合指標- -可持續發展綜合指數、人口狀況等5個基本指標和人口自然增長率等30個元素指標的層次性指標體系結構框架，熵技術支持下確定可持續發展指標權重的層次分析法，以及由遞階多層次綜合評價、主成份分析和回歸分析等數學方法所集成的可持續發展全面綜合評價模型，並以陜北黃土高原為例進行了具體的應用分析與評價。Abstract : while the brilliant achievements in science and technology are obtained the lessons on understanding and reforming nature are drawn by human. the lessons are mainly form natural disasters. based on the information from mrnatcat service and other statistical data, the main characteristics and distributions of global natural catastrophes in the 20th century are briefly reviewed, and the primary causes of the natural catastrophes in the world are analyzed as well
文摘:人類在科學技術取得了輝煌成績的同時，在認識自然和改造自然方面也得到了教訓和新的認識.這一教訓主要是來自自然災害.根據收集到的全球自然災害有關數據，對21世紀全球主要自然災害特徵和分佈特點進行了分析，並對其成因提出了看法Sino group and wwf - hong kong collaborate to conduct the 2nd census for hong kongs chinese white dolphins also known as pink dophins. the event dubbed pink dolphin watch day aims at collecting data to reveal how the population of pink dolphin is changing through time
是次中華白海豚普查日由信和集團及世界自然香港基金會簡稱世界自然基金會攜手合作，為香港的中華白海豚進行第二次的數目普查，以搜集資料研究白海豚于過去十一年的變化。As the results, more and more serious requirements were raised to the nuclear data acquisition and control system. in order to meet these requirements and to support the advanced study of the interaction between clusters and materials, a key project supported by china national science foundation, we have done the study of the data acquisition and control system for the clusters characteristic in detail, and employed single - chip microcomputers and pc computers to compose a large scale data acquisition and control system. the composition mode of this kind of system and the distribution of tasks, the acquisition and control circuit units based on single - chip microcomputers, the real - time communication methods and the software composition under the windows 98 were also discussed in detail
針對這一問題並為了保證國家自然科學基金重點項目「荷能離子團簇與介質的相互作用」等前沿研究課題的進行，本論文對團簇研究中的數據獲取和調控問題進行了詳細研究，提出了以pc微機和集群式單片微機為主構成的團簇特性研究用分散式多通道數據獲取和調控系統的方法；詳細討論了這種系統的最佳組成模式、任務分配、單片微機數據采控單元、系統內實時通訊網的建立和windows環境下系統軟體的編寫等硬軟體問題。Cliff arnall of cardiff university has analysed such factors as outdoor activities, nature, social interaction, childhood memories, temperature and holidays - data gathered over a period of 15 years in interviews with 3, 000 people around the world
加的夫大學的克里夫阿諾爾對戶外活動自然社會交往童年記憶溫度和假期等因素進行了研究分析。他在15年間訪問了世界各地的3000個人收集了研究所需的數據。In this paper, we first introduce the achivements of the research on bruck - reilly semigroups in these years, then we study block - separating congruences lattices on e - bisimple semigroups. let / be the set of natu ral numbers, and i the set of all nonnegative integers
設i為自然數集合， i ~ 0為所有非負整數集合， t為任意幺半群， g為幺半群t中所有單位組成的群，用1來記t中的幺元。Aiming at the limitation of basic evolution strategies, a kind of growth mechanism - based evolution strategies and its realization are introduced. chapter three presents the evolution strategies - based optimizing of seaport container logistics system, firstly the structure of chromosome is introduced, then a kind of hybrid mutation operation is used, the detail process of the optimizing method is also described, finally the traveling sequence optimization of the containers is introduced as an example to testify the feasibility of the new optimizing method
在以往的港口物流系統規劃研究中，遺傳演算法和模擬退火法是經常採用的數學方法，第三章首次研究了基於生物進化策略的港口集裝箱物流系統優化方法，提出了一種基於混合變異的自然數編碼進化策略演算法和染色體的構造模式，並以集裝箱運送順序優化問題為例，實現了基於生物進化策略的港口集裝箱物流子系統的優化。分享友人