水平精度系數 的英文怎麼說

中文拼音 [shuǐpíngjīngdùxìshǔ]
水平精度系數 英文
horizontal dilution of precision
  • 水 : 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
  • 平 : Ⅰ形容詞1 （沒有高低凹凸 不頃斜） flat; level; even; smooth 2 （高度相同; 不相上下） on the same l...
  • 精 : Ⅰ形容詞1 （經過提煉或挑選的） refined; picked; choice 2 （完美;最好） perfect; excellent 3 （細）...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 水平 : 1. （跟水面平行的） horizontal;level2. （達到的高度） standard; level
  • 精度 : precision; accuracy; degree of accuracy; precision accuracy; trueness
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Plant endemism is the key problem in floristic study. analysis of endemism in a flora has significant implications in demonstrating floristic richness and diversity, the relationship between plants and their environment, and also in conserving biodiversity of the flora. in view of the situation that most of the past studies on endemism were qualitative, this study is the first tentative approach to the introduction of quantitative indices to the analysis of floristic endemism, with an purpose to push the study of endemism from qualitative to quantitative. four quantitative indices are introduced, i. e. level of endemism ( l ), coefficient of endemism ( c ), degree of endemism ( d ) and general index of endemism ( a ). mathematical formulae have been given to each of the above indices and explanations for them have been presented, and the scope of their use in floristic studies has been delimited and exemplified in this paper. the result shows that they are of good applicability. the proposed indices embody full information of plant systematics and plant geography. with the aid of qualitative analysis, the application of the proposed indices will improve the comparability and precision of endemism study in floristics

    過去有關特有現象的研究主要限於定性的分析，可比性和精確性較差.該文嘗試引入特有現象的定量化指標，以推動特有現象的分析研究從定性水平向定量水平邁進.所引入的4種定量化指標分別是：特有水平、特有系數、特有度以及特有綜合指數.對每種量化指標都給出了數學表達式，說明了其區系學意義，例證和界定了這些指標在植物區系分析中的應用，結果表明，它們有良好的適用性.這些指標充分地包含了植物系統學和植物區系學的信息.結合定性分析，這些指標的應用將增強植物區系研究的可比性，使植物區系特有現象的分析達到更精確的水平
  2. When catchment area, average channel gradient and catchment shape factor of designed culvert or bridge are known, a user can be convenient to get local parameters c, e and b from standard contour charts and easy to calculate flood flow just by a calculator. design period of flood flow is enormously shortened as well as a high precision. estimated flood flow through culvert or small bridge by new calculation model is generally less than by traditional methods, so that much cost is cut down a s reducing the span of culvert or small bridge

    以75000km ~ 2的川中丘陵地區為試點研究區，繪制了該地區新模型的參數等值線圖，率定了不同設計頻率的改正系數，使設計者只需在地形圖上獲取集水面積，河道平均坡降和流域形狀系數，在參數等值線圖上查得橋涵所在地的相應參數，使用計算器即可迅速計算出設計流量，大大縮短了設計周期，且精度較高，設計的洪水流量一般低於傳統方法，從而可減小橋涵跨徑，節省投資。
  3. The improvement system is made up of the pressure sensor, flow sensor, displacement sensor, electro - hydraulic proportional flow control valve, power amplifier, data gathering board and computer. the platform can carry out testing the hydraulic parameters, processing the tested data, saving the processed data and drawing, adjusting the pressure automatically

    改造后的測控系統主要由壓力傳感器、流量傳感器、位移傳感器、比例節流閥、功率放大器、數據採集卡和計算機組成。改造后的實驗臺具有自動採集實驗數據、自動處理實驗數據、自動保存實驗數據、自動調節液壓系統負載壓力等功能，大大提高了實驗臺的工作效率、測試精度和智能化水平。
  4. The nucleotide ( nt ) sequence of the insert in phz1754 is 2299bps in size. computer assisted analysis of the sequence revealed an open reading frame ( orf ) with a g + c content of 70. 3 % that would encode a protein of 552 amino acids ( aa ). the nt seque nce comparision revealed that the orf in the sequenced region exhibits 85 % dna sequence homology with the cholesterol oxidase gene choa of streptomyces sp

    對phz1754進行外切核酸酶（ exonuclease ， exo ）順序缺失，獲得單向長度漸減重疊的系列突變體，核苷酸序列測定顯示出該ecor - sal片段的精確大小為2299bps ， frameplot程序分析揭示出該區域一個完整的開放閱讀框（ orf ）的存在，其大小為1656bps ， g + c含量為70 . 3 ，編碼552個氨基酸，利用blastsearch程序將orf的核苷酸序列及推導的氨基酸序列與因特網上基因及蛋白質數據庫進行綜合比較，發現無論在核苷酸水平還是在蛋白水平上，該orf均與膽固醇氧化酶表現出同源性，而且與鏈黴菌膽固醇氧化酶同源性最高，說明該orf編碼膽固醇氧化酶基因。
  5. Based on rain drop size distribution ( dsd ) data measured in qingdao, guangzhou and xinxiang, the radar reflectivity factor z for spherical rain drops, the radar reflectivity factor zh and differential reflectivity zdr for oblate ellipsoid rain drops have been calculated. the relation of reflectivity and rainfall rate for conventional meteorological radar and the relation of reflectivity, differential reflectivity and rainfall rate for multiparameter radar are regressed, the performance difference of two kinds of radar for measuring rainfall and difference for measuring rainfall in different regions are also discussed

    基於我國青島、廣州和新鄉地區雨滴尺寸分佈數據，計算了球形雨滴雷達反射因子，橢球形雨滴雷達水平極化反射因子和差分反射率，回歸給出了這些地區的常規氣象雷達反射因子與降雨率的經驗關系和多參數雷達水下極化雷達反射因子、差分反射率和降雨率關系，並對其測雨精度和地區差異進行了比較。
  6. Based on the spectral irradiance measured with the sun - atmosphere ultraviolet spectrum radiometer ( sauvs ) developed by the institute of atmosphere physics and the changchun institute of optics and fine mechanics, chinese academy of sciences, measuring the direct and scatter irradiance spectrum of ultraviolet waveband which arrives in beijing global surface, giving a method of retrieving the aerosol optical depth ( aod ) and put up with primary results that exponential function can fit the retrieval results according to its visibility, putting forth different coefficients and functions on variable visibility, also giving a primary analysis on the aod in dust - storm day and some contrast between sun - day and dust - storm day, analyzing the ratio between scatter and total irradiance, and its relationship with atmosphere mass and total atmosphere optical depth, lastly contrasting with the survey results by aeronet beijing station, the results of retrieval is in reason, this work gives some help in researching the co - effect of aerosol - radiance - climate and makes preparation for further survey on the radiance characteristics of dust

    利用中國科學院大氣物理研究所與長春光學精密機械研究所合作研製的太陽?大氣紫外光譜輻射計（ sauvs ） ，測量到達北京地表的太陽直接和散射紫外光譜輻射，導出了大氣氣溶膠的光學厚度。初步結果表明：北京紫外波段大氣氣溶膠的光學厚度在絕大部分情況下隨波長的增加而單調減小，用指數函數可以較好地擬合反演結果，統計得到了三個水平能見度狀況下擬合函數的系數值和公式表達式；初步分析了揚沙、浮塵、沙塵暴天氣條件下氣溶膠光學厚度的特點，並與一般晴朗天氣條件下的氣溶膠光學厚度特點做了比較分析；分析了太陽紫外譜輻射中散射輻射與大氣質量、大氣總光學厚度的定性關系和定量表達式；最後與全球氣溶膠監測網路（ aeronet ）北京站的資料做比對，表明反演結果基本合理。
  7. For a cubic crystal of 1cm 1cm 1cm, the horizontal and vertical selective angles are 0. 008 and 0. 41 respectively. so the system is capable of storing 10000 holograms. we also have made an off - line heater and an on - line heater, both of which are controlled by a temperature controller ( model eurotherm )

    對于邊長為1cm的立方晶體，復用系統在水平方向和垂直方向上的選擇角分別為0 . 008和0 . 41 ，能夠存儲10000幅數據頁；復位裝置的角度復位精度優於0 . 001 ；溫控加熱裝置的控溫精度為0 . 1 。
  8. In order to solve the problems effectively, under the auspices of 863 plan in china, the synthesis diagnosis has been carried by means of measuring and numerical imitating the combustion chamber of refining column, and some conclusions is such as : ( 1 ) through measuring the temperature and combustion in the burning chamber of the refining column, the result shows the temperature difference on the same level is more than that in height direction, and there is a few of co in bottom of burning chamber. ( 2 ) in order to ensure normal work of flue system in lead column in the course of zinc refining, theoretic calculation and measure about the flow resistance of exhaust gas are carried through. the results of study reveal that drawing out force of chimney is inadequate, which is mainly caused by illogicality of flue construction

    在研究過程中，採取了現場實測和數值模擬手段對韶關冶煉廠鋅精餾鉛塔燃燒室及排煙系統進行了綜合診斷，具體結果包括如下： （ 1 ）完成鋅精餾鉛塔燃燒室內溫度測試以及燃燒狀況的測試，結果發現：鉛塔燃燒室內水平方向的煙氣溫度並非均勻，而且其溫差比上下方向的溫差更大，以及鉛塔燃燒室尾部存在co未燃燼問題； （ 2 ）為了保證鉛塔煙氣系統的正常工作，對煙道系統的阻力進行了理論計算及測試分析，結果發現：鋅精餾鉛塔煙氣系統中煙囪抽力不夠，這主要是煙道結構不合理所造成的。
  9. Using plots with water and fertilizer fully controlled, the effect of photosynthetic characteristic and yield under different treatments of water and fertilizer coupling was investigated. the result showed that photosynthetic rates are different among treatments of water and fertilizer coupling, and the change of stomatal conductivity is the same as photosynthetic rat. there is almost no influence on evaporation rate and cellular co2 concentration the combination of fertilizer and manure under natural rainfall is beneficial to the maintenance of photosynthetic rate during grain filling, thus results in highter yield and good quality. however, the coupling of fertilizer and manure with sufficient water results in the decline of photosynthetic rate and stomatal conductivity, the yield decreased indicating there has a balance ratio between water and nutrients ( fertilizer and manure ) supply. the study proposed that the optimum management to exploring yield and qlality potential is the combination of fertilizer and manure application with no irrigation

    利用可精確控制水分條件的水肥平衡場，在不同水肥耦合處理的條件下，研究了水肥耦合對玉米光合特性及產量的影響，結果表明:不同水肥耦合處理的條件下，玉米的光合速率有所不同，氣孔導度的變化與光合速率的變化表現基本一致，而對蒸騰速率、細胞間co2濃度影響不大.其中，在自然降水條件下，有機肥和無機肥的配合，有利於玉米子粒灌漿期維持較高的光合速率，表現出良好的產量潛力.充足水條件下，有機肥和無機肥的配合，光合速率及氣孔導度表現較低，表現產量有所下降，說明供水量與施肥量之間有一個平衡系數.表明黑龍江省北部黑土區自然生態條件下，為充分發揮玉米的產量潛力，最佳的管理措施是增施無機肥和有機肥的配合
  10. Three finite - difference methods, i. e., stagger grid, implicit and explicit algorithms, are analyzed in detail. multi - grid algorithm is firstly introduced in elastic wave simulation, to solve for the stability problem inherent in stagger grid and implicit algorithm, also for the efficiency problem inherent in explicit algorithm, and the precision, stability and efficiency for simulation of elastic wave arc increased by multi - grid method. phase - delay method is provided to effectively absorb boundary reflection and increase efficiency for wave motion simulation, based on phase delay and amplitude decaying features along wave propagation

    在水平分層介質接收函數的波形反演研究的基礎上，本文系統闡述了非均勻介質中彈性波傳播數值模擬常用的三種有限差分方法：顯式差分、隱式差分和交錯網格法，首次將多重網格演算法應用於彈性波方程的數值模擬問題，克服了交錯網格法和顯式差分法穩定性差，以及隱式差分法計算效率低的缺點，大大提高了彈性波數值模擬的精度、穩定性和計算效率。
  11. The paper analyze many methods of water demand prediction which include many up to date methods and some in common use, and it bring forward some new combinatorial methods which can meet the need of optimization model in precision, such as season exponent, auto adapt filter, season exponent combined grey model, etc. based on the cost and time of modeling jt mainly study the macroscopic network model which describes the correlation between nodal pressures and water plant discharge

    針對時用水量預測模型，採用季節指數法、自適應指數平滑法、季節指數聯合自適應過濾法、指數平滑聯合自回歸法、季節指數聯合灰色系統法等具體預測方法，其中數種方法預測精度達到工程要求。實踐結果表明，開發的聯合法效果較好。考慮到管網宏觀模型不但能描述整個管網的工作狀態，而且建模所需成本低，運行速度快，省時省力，主要研究了管網宏觀模型的建立方法，分析測壓點布置原理並編製程序。
  12. Travel time is the key point of system, its measure quality decides the survey precision of the stress. time to digital convertor ( tdc ) was applied to accomplish the precision time interval measurement. at the same time, one transmitter - two receivers probe arrangement and zero - crossing detecting method were also applied to reduce the errors in measurement

    傳播聲時是整個測量系統中的關鍵量，其測量水平決定應力的測量精度，對此本文採用時間-數字轉換器（ timetodigitalconvertor ， tdc ）完成高精度時間間隔測量，在實現過程中又分別採用「單端發射-雙端接收」的探頭布局模式和「過零檢測」手段來降低系統檢測誤差。
  13. In order to gather and analyse the load information automatically and promote the level and precision of distribution network plan, line loss analysis and operation mode adjustment, the data from distribution measuring devices, load supervising system and automatic message registering are centralized through mapping in dgis ( distributuin geography information system ) and other three systems

    摘要為實現對配網中負荷的自動採集和分析，以提高配網規劃、線損分析及運行方式調整的水平與精度，採用中心數據庫數據集中方式將配電綜測儀、負控系統和抄表程序數據集中管理。
  14. The subsystem is integrated in the cad system of catia, and applies kinematics 3d - manikin and mechanics 3d - manikin in different phase of aircraft cockpit design, and acquires perfect kinematics and mechanics results of pilot. the subsystem whose interface is friendly and utilization is directly, enriches the methods by which the designer estimates an aircraft cockpit design, and enhances the design efficiency and precision

    該子系統集成在catia系統中，在飛機座艙設計的各個階段分別引入了飛行員三維人體幾何模型和運動學模型，通過模擬飛行員的操作動作與計算視角、可達性、操縱力等參數，較好的反映了飛行員的運動學和動力學特徵；界面友好，操作直觀、簡便；豐富了設計人員對飛機座艙設計評估手段，保證了設計效率和精度；有利於飛機座艙設計水平的提高。
  15. The tingjing group is in putting into effect the course of mrpii system, a mrpii does not only regard one set of software to come to popularize and is regarding a management model to recommend ; by way of mrpii system and computer network, each department and post can be covered by the system on universal ground a staff can get any information that relates with oneself vocational work by way of the cross - domain communication at any time, gain the various policy decision supports of real time quantification, carrying on operation process imitates, not only can quicken the rate of progress planning the work such as formulation and cost accounting etc greatly, and still economize that the report form and data shortened whole vocational work period in the delay that the difference function circulated between the department, and retrenched the personnel of work, and raise the efficiency managing work conquer the solid foundation for business process reengineering ( bpr ), takes mrpii as the foundation, bpr has been in progress in the company and builded performance " s evaluation system

    引入mrp管理系統是提高管理水平的一個有效途徑。天健集團在實施mrp系統的過程中，不是把mrp僅僅作為一套軟體來推廣而是作為一個管理模式來引進的；通過mrp系統和計算機網路，各部門和崗位可以普遍地被系統覆蓋，員工通過網路隨時可以得到與自己業務有關的任何信息，取得實時量化的各種決策支持，進行業務流程模擬，不僅可以大大加速了計劃制訂、成本核算等工作的進度，還節省了報表、數據在不同職能部門之間流通的延誤，縮短了整個業務周期，精簡了事務性的人員，提高了管理工作的效率。還為實現組織的扁平化提供了條件，為流程重組打下了堅實的基礎。
  16. Using new technology of fieldbus and client / server, a real - time and multi - parameter drilling monitoring system with high precision, complete function, beautiful and friendly interface is developed. the system has been applied in drilling scene and gets fine application effect. to solve the problems mentioned above, the article discusses the measuring methods and building of the mathematic model, and by adopting bus and user / server, develops a real - tune multi - parameter drilling monitor system of high accuracy and friendly interface

    本文針對以往國內鉆井參數儀表存在的問題，參考當今國際先進水平，對鉆井參數的建模和測量方法進行了研究，並在此基礎上運用現場總線、客戶服務器等新技術研究開發了一套精度高、功能齊全、界面美觀友好的實時多參數鉆井監測系統。
  17. The system has been used in wood drying kiln production process since december 2002. high precise, real - time scanning, accuracy test is validated by operational result. reliability of measure result, convenience of fit and debug, long distance of signal transmission, lower price and capability of anti - noise are the performance characteristic of this system

    半年來，實際運行結果表明，該系統能夠高精度、實時巡測窯內溫度、平衡含水率、木材含水率等乾燥過程基本參數，準確提供乾燥狀態信息，具有測量參數全面、測量結果可靠、系統功能豐富、安裝調試方便、信號傳輸距離遠、檢測精度高、成本低、抗干擾能力強等特點。
  18. Limited by adc chip ’ s manufacturing processing, it is hard for a single adc chip to acquire the high sampling rate and high precision at the same time. the method of parallel times - interleaved sampling adc system is effective to solve this problem

    受模數轉換晶元發展水平的限制，單片adc晶元很難同時滿足高速高精度的要求，多片adc并行交替采樣技術是突破採集系統這一瓶頸的有效方法之一。
  19. We describe the design of floodnet, a flood warning system, which uses a grid - based flood predictor model developed by environmental experts to make flood predictions based on readings of water level collected by a set of sensor nodes

    我們知道水災發生所造成的危害與水位深度和作出水災預報的時間有著很直接的關系，所以這個項目主要通過在泛濫平原上運用普適計算技術來獲得更好的水位數據，從而提高水災預測的精度。
  20. The author first explains that large - scale measurement device is one of the most basic measuring methods of obtaining external trajectory data and flight status. lt is pointed out that the accurateness of the main - item axis system deviation correction ( including vertical, level and collimating axis deviation ) of large - scale measurement device error is of critical importance to the precison of measuring device ' s surveying angles. to improve its precison, the influence of axis system deviation on surveying angles must be corrected

    首先說明了在現代航天靶場中，大型測量設備是獲取外彈道數據和飛行狀態的最基本的測量手段之一，指出大型測量設備測量系統誤差的主項軸系偏差（包括垂直軸偏差、水平軸偏差和照準軸偏差）改正的精確與否直接關繫到測量設備的測角精度，因此要提高測量設備的測角精度，必須對軸系偏差對測量角的影響進行改正。
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