空化數 的英文怎麼說
中文拼音 [kōnghuàshǔ]
空化數
英文
cavitatio umber-
The additional flow is formed by the device of dentoid baffle, and the application of the device of dentoid baffle cooperated with a stilling basin has been investigated by systematic model tests. based on the research results, the hydraulic problems such as the characteristics of hydrodynamic pressure and cavitation on the head of the denotid baffle, the properties of flow under the condition that the device of denotid baffle is used with a stilling basin, the hydraulic computation about a stilling basin, the estimation of energy dissipation and its various affection factors, the mechanism and effect of energy dissipation, and distributions of velocity and pressure and aerating concentration, etc, have been analyzed ; the method and step of hydraulic design of device of denotid baffle by which the additional flow is produced has also been proposed
文中利用齒墩設施實現附加射流，對齒墩設施與消力池聯合應用進行了大量的和系統的模型試驗，分析研究了中低佛勞德數條件下，齒墩墩頭的動水壓強及空化特性，齒墩設施與消力池聯合應用時的流態特性，消力池的水力計算，消能量的估算及其各種影響因素，消能機理和效果，消力池內的流速、壓強特性，摻氣濃度分佈等水力學問題，並提出了實現附加射流齒墩設施的水力設計方法和步驟。The management work data of oil - field earthquake exploration and oil - well position, which has not only data of current space position, but also entitative attribute data describing, have great capacity, traditional cad graphics describing the data plus the model database managing mode ca n ' t already adapt the modem exploration with well geography information for management work demand, so it is necessary to realize the unique management of exploration and oil - field well space data and attribute data use advanced geography information system ( gis ) technique, this thesis is based on the excellence ' s table ' s top geography information system - the maplnfo software, using the second process technique, the digital relief map and tectonic map as the base map, the earthquake exploration database as the original data, established the gis of the exploration and oil - field well in the area of the liaohe oil - field, realize visualization management, it provides a reference thereunder for the earthquake exploration deplo ying the workload and proceeding the technique design, and completed lots of practical work
油田地震勘探與油井井位管理工作數據量大，既有空間位置數據，又具有實體的屬性描述數據，傳統的cad制圖+屬性數據庫管理模式已經不能適應現代勘探和井位管理工作的需要，採用先進的地理信息系統（ gis ）技術，實現勘探和油田井位空間數據和屬性數據的統一管理是必然的趨勢。本文以優秀的桌面地理信息系統mapinfo軟體為開發平臺，在此基礎上進行二次開發，以數字化地形圖、構造圖為載體，以地震勘探數據庫為數據源，建立了遼河油田范圍內的地震勘探和油田管理信息系統，實現了數據的可視化管理，為地震勘探部署工作量、進行技術設計，提供了圖形和數據的參考依據。並完成了很多實際工作。As one of frame data of national spatial data infrastructure, digital elevation model excels contour line. it can express continuous gurgitation of ground, and it can also carry out relevant mathematical analyses and imitation, so it is applied broadly in various fields at present
=數字高程模型dem是國家空間數據基礎設施的框架數據之一，其彌補了等高線的不足，既能表示地面的連續起伏變化，又適合作相應的數學分析和模擬，現在已在各個領域得到了廣泛的應用。Ultrasonic has being attracted much attention gradually in fuel atomization because of some specialities of cavitation and infection on liquid flow. in the course of atomization of pitchy oil, especially, does it show greatly its advantage, but its material atomizational mechanism need research ulteriorly. the primary content of this thesis is about adding cantilever reed to effervescent atomizer so as to combine ultrasonic and effervescent. this thesis has discussed ultrasonic some mechanism, ultrasonic dynamical procreator, effervescent and liquid mucosity infection on atomization, at the some time we make some experiments and discuss atomization rule following some machinery parameter and run parameter so as to find some rule about ultrasonic atomization and to rich the research of ultrasonic atomization mechanism. all that will be beneficial to the design about ultrasonic atomization atomizer
超聲波由於其空化機理及對液體的流變性影響等特性，在燃油霧化燃燒中逐步引起人們的重視，尤其在重渣油等高粘度液體的霧化過程中逐步顯示出其優越性，但其具體的霧化機理還需要做進一步的研究在氣泡霧化噴嘴基礎加入懸臂式簧片哨，將超聲波與氣泡霧化相結合是本文討論的主要內容本文從研究超聲波的一些機理入手，討論了超聲動力發生器氣泡霧化以及液體粘度對霧化質量的影響，並通過具體的實驗，根據實驗數據來討論霧化質量隨各種結構參數運行參數的變化規律，以便找到超聲霧化的一些規律，豐富對超聲霧化機理的研究，對超聲霧化噴嘴的設計具有一定的指導意義。The gis developed with the combination of mapx controls and object language, realizes the integral saving and management of spatial data and attribute data, and theoretically ensures the datashare and the integrality of data. such a system has been applied to the daily management of chongqing expressway, is proved to be of active contribution to the work efficiency and effect. it will surely promote the development of its in the future
基於oraclespatial ，運用mapx控制項和面向對象語言相結合開發的gis應用系統，實現對gis空間數據和屬性數據的一體化存儲和查詢，即不將地理信息存儲在原來的地理信息系統中，而是存到關系數據庫中，這種一體化技術實現了數據管理的規范化和數據操縱的標準化，使用戶可以比較方便的組織各類空間信息處理事務，在數據完整性方面提供了有效保證。The asteroids are the most important small bodies in the solarsystem, and they mainly lies in the two locations - a main belt between the mars ' s orbit and the jupiter ' s and the near - earth space. the most feature of the orbits of near - earth asteroids ( neas ) is that the semi - major axes of the orbits are nearly equal to that of the earth or the perihelia distances are approximate to or even less than the mean distance between the sun and the earth, thus they could move into inside of the earth ' s orbit, so that they might close approach or even colliside with the earth ( or other planets, such as the venus, the mars, etc. ). the characteristic brings about some difficulties in the numerical research during their orbital evolution, which leads to the failure of the normalization technique in the general removal impact singularities of celestial mechanics methods and the symplectic algorithm which is successfully applied to the investigation in quality. by comparing the computation effects of several common numerical methods ( including symplectic algorithm ), and considering the nature of the movement of the small bodies, the corresponding treatments are provided here to improve the reliability of the computation
小行星是太陽系最重要的一類小天體，主要分佈在兩個區域；火星和木星軌道之間的一條主帶和近地空間.近地小行星軌道的最大特點是其軌道半長徑與地球軌道半長徑相近，或近日距離接近甚至小於日地平均距離，其運動可深入到地球軌道的內部，這將導致該類小行星與地球（還有金星、火星等）十分靠近甚至發生碰撞.這一特徵給其軌道演化數值研究帶來一些困難，包括天體力學方法中一般消除碰撞奇點的正規化處理以及對定性研究十分成功的辛演算法都將在不同程度上失效.通過對幾種常用數值方法（包括辛演算法）計算效果的比較，根據小天體運動自身的特性，給出了相應處理措施，從而可提高計算結果的可靠性An optimization disposal algorithm of edges in generating quadrangular meshes based on non - closing cloud data is proposed
摘要提出了一種非封閉曲面的海量空間數據點四邊形網格劃分過程中的邊界優化處理演算法。It was the first trial to employ the newly equipped migration data acquisition and analysis system for the scanning entomological radar and, a twin light - trap developed in china for, systematic long - term observations of migration of the beet armyworm spodoptera exigua, beet webworm loxostege sticticalis and cotton bollworm helicoverpa armigera in northern china the study provided direct evidence for the migration of 5 ". exigua in china, many parameters of migratory behaviour of the three species of insects, a better understanding of the relationship between migratory behaviour and wind or temperature field. the results enriched the theory of migration and provided new scientific knowledge for pest management in china
本研究初步闡明了我國華北地區空中昆蟲群落結構，首次使用我國自行研製的掃描昆蟲雷達的數字化數據採集及分析系統，及價廉、高效的姊妹燈誘蟲法對華北地區甜菜夜蛾spodopteraexigua 、草地螟loxostegesticticalis和棉鈴蟲helicoverpaarmigera的遷飛進行了長期系統地觀測，得到了甜菜夜蛾在我國北方遷飛的直接證據，三種害蟲遷飛行為的若干參數，認識了昆蟲遷飛行為與風溫場的關系，豐富了昆蟲遷飛理論，為我國害蟲的治理提供了科學依據。In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft, the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s. ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well. ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively
本文通過試驗研究與理論分析對旋流式豎井泄洪洞應用於高水頭、大泄流量情況時存在的一些水力學問題進行了研究和探討，取得以下主要成果：一、結合小灣工程導流洞改建，對高水頭（ 252m ） 、大泄流量（ 1400m ~ 3 s ）條件下旋流式豎井中的水流運動特徵進行了比較全面的測量，包括空腔形態、徑向流速分佈及井壁壓強等；二、提出了豎井空腔段螺旋水流水力計算方法，其計算結果與實測值吻合良好；三、利用試驗與計算結果，對旋流式豎井的消能機理進行了探討，對豎井各部分的消能能力有了總體認識；四、對豎井下部消力井的合理井深進行了優化試驗研究，發現消力井合理深度為0 . 9d左右；五、通過試驗研究，歸納出豎井水流總摻氣量估算方法，為導流洞排氣方案的設計提供了參考依據；六、在高水頭、大流量條件下，豎井空腔段下部流速很高，盡管水流螺旋運動引起的離心力可以確保井壁壓強保持正壓，但空化數依然較低，因此豎井的空化空蝕始終是工程界關注的重大問題。It was through precise mathematical deduction, data imitation, and analysis to experimental data that this topic is studied. this dissertation is theoretically instructive and practically useful, to a certain extent, to the traveling bubble cavitation noise around a schiebe body
全文通過嚴密的數學推導，模擬和實驗數據分析等方法實現對這一課題的研究，對于回轉體流動泡類型的空化噪聲具有一定的理論指導意義和現實應用價值。Firstly it discusses the value, meaning, background and method of this topic. then it deducts the single - bubble sound pressure, spectrum of sound pressure, power spectrum. according to the real situation of traveling bubble cavitation noise around a schiebe body, the mathematical model of single - bubble collapse is selected, furthermore, the mathematical model of mass traveling bubbles without interference effect is established, and the multi - peaks and rebound phenomenon while bubbles collapse is also analyzed with statistical method
首先論證了本項研究的意義，價值，背景和方法，然後推出了單空泡輻射噪聲聲壓，聲壓譜和功率譜，針對回轉體流動泡空化噪聲的具體情況，選擇了雙指數模型作為單空泡潰滅的數學模型，進一步建立了無干涉條件下的群泡輻射噪聲的數學模型，並用統計的方法分析了空泡潰滅時的多峰值和反彈現象。His areas of specialization cover the development and application of intelligent spatial decision support systems, spatial optimization, fuzzy sets and logic for spatial analysis, geocomputation, spatial data mining and knowledge discovery
他的專門研究范圍包括智能空間決策支援系統、空間優化、空間分析的模糊集合及邏輯、地理計算學、空間數據發掘及知識發現。Firstly, it constructs ekgcsdb based analyzed region all groundwater hydrochemistry data, then based on ekghsdb it conducted secondary developing and realized erdos cretaceous groundwater hydrochemistry analysis system ( ekghas ) seeing mapgis as developing platform, it took advantage of many tools and methods in the course of realization, for example, visual c # computer language, mapgis65 developing technology and ado technology etc. the system can complete not only basic database management, figure display and query but isoline form function
在全面分析了研究區水化學資料的基礎上，首先構建ekghsdb ，接著以mapgis為基礎平臺，通過使用visualc #語言，利用mapgis65組件式開發技術與ado技術，以建成的ekghsdb為基礎，進行了二次開發並實現了鄂爾多斯盆地白堊系地下水水化學空間數據庫分析應用系統（以下簡稱ekghas ） 。This article discusses the standard of geographical information system and the model of geo - data. after analyzing the present system of geo - data share, presents a new method of spatial database. it designs and impalements a data share and exchange system, which enable storage geo - data attribute data and meta data to realize the integrative management of data
論文系統分析了地理信息系統標準和空間數據模型，並對常見的空間文件格式進行分析；總結以前的空間數據共享體系結構；提出了新的空間數據庫平臺共享方案；在研究了oraclespatial對空間數據解決方案后，設計並實現以oralcespatial為存儲gis系統的空間數據、屬性數據，和元數據，實現數據一體化管理模式；並實現esri公司的We obtained the uniform data distribution from discrete data points by inserting spatial dots and then set up digital elevation model ( dem ) of correlative area through constructing mutual linked triangle net. the isoline graph was implemented based on this model. during the processes, we combined the technology of stratification computing when inserting special dots in fault area with the technology of stratification triangle net in fault area for dealing with thrust data
然後介紹了在本研究中構造逆斷層地質等值線的基本思路：從離散數據點結構出發，採用空間數據內插方法進行數據的均勻化，通過三角剖分構造出相互連接的三角形網路結構來建立起相關區域內的數字高程模型，利用該模型構造出相應的地質等值線圖，其中使用擴展點與斷層區的關系屬性進行斷層區分層空間插值計算處理和斷層區域的分層三角形網格化處理相結合的技術，實現逆斷層數據的處理和等值線繪制。After analyzing and study two transitions of map to spatial data and spatial data to map, the author thinks the spatial data capturing is a loss map information process, and for map production firstly symbolize from spatial data, then reinforce the map information. the map production model ( mpm ) is the summary of all kinds of map production. the integration model is the best model in mpm and it infers that " spatial data first, map second " is the production process
提出了「靜態數字制圖」和「動態數字制圖」的概念，論述它們各自特點和研究方法，並提出地圖制圖和空間數據生產都屬于「靜態數字制圖」 ；通過研究地圖和空間數據的相互轉換過程，發現空間數據生產是地圖信息損失的過程，根據空間數據來進行地圖生產必須先實現地圖符號化，然後再進行地圖信息的補充處理；本文提出的「地圖生產模型」是現有各種數字化生產模式的基礎，從理論上論證了一體化生產模式是最優模式，推導出「先空間數據生產，后地圖出版」的一體化生產流程，並歸納總結了當前數字化生產的4種基本生產模式和9種應用情況。Based on the above theoretical research, this paper applied component gis method to develop the rural power distribution network management system of baoding city. laishui county as a case of practical application. in the advanced visual programming language - visual basic 6. 0 development environment, we took advantage of america gis component - mapx4. 5 to have implemented gis functions of the system in space data gathering, management, disposition, analysis, output, etc
在以上理論研究的基礎上，本文以保定市淶水縣農村配電網管理系統的建設為例，利用美國組件式gis軟體? mapx4 . 5 ，結合高級可視化程序設計語言vb6 . 0 ，完成了系統在空間數據採集、管理、處理、分析、輸出等方面的gis功能。Further, the moving track of the cavity and its changing regularity of radius can be get along ~ vith the transformation of the pressure. in the calculation of this paper, matlab programming language is applied. in the past, fortran language is mostly used in scientific computation
空化現象與流場內的壓力分佈密切相關，根據壓力的分佈可以得到流場內的空化數分佈，而空化數的分佈決定了流場內的空蝕空化。Relativel ~ ~ matlab language is more powerful than oilier computing language, especially in computation fluid mechanics, it helps to simply draw charts of vortex, stream function, velocity, pressure, and the amount of work can be extremely reduced, and the program coniplving can also be controlled easily
得到空化數的分佈以後，進而分析流場內空泡的運動軌跡，最後得到空泡半徑在流場內隨壓力的變化關系曲線，以及在流場內空泡半徑沿壓力最小點的分佈規律。Variations in pressure with and without aeration in cavitation region are measured and the compressible characteristics of pressure waveforms and relation between mach number and compression ratio are analyzed ; the time - averaged pressure profiles of different air concentration in cavitation erosion region are measured, the variations of the pressure with air concentration and effects of back pressure on cavitation erosion are analyzed ; the relations between least air concentration to prevent cavitation erosion and flow velocity are proposed ; the cavitation numbers with and without aeration in cavitation region are compared
實測了空化區摻氣前後壓力的變化，分析了壓力波形的可壓縮流特徵以及馬赫數與壓縮比的關系；實測了空蝕區不同摻氣濃度的時均壓力分佈，分析了壓力隨摻氣濃度的變化及背壓對空蝕的影響；提出減免空蝕的最低摻氣濃度與流速的關系，比較了摻氣前後水流的空化數。分享友人