測高差 的英文怎麼說
中文拼音 [cègāochā]
測高差
英文
heighting-
The model of the itr between a1n and cu is built by using the acoustic mismatch model, amm and diffuse mismatch model, dmm. because there is a limit of roughness and temperature in amm and dmm, the data of the theory model that is directly built by amm and dmm is far from the experimental data. accordingly, with dmm and traditionary methods, the mathematics model is posed by contrast and analyses of the experiment data
由於聲失配理論和散聲失配理論對溫度和粗糙度有很嚴格的要求,所以直接建模所得的理論數據與實驗數據有很大的差距,本文採用聲失配理論與傳統研究方法相結合,通過與實驗數據的分析擬合,提出了修正的數學模型,預測誤差有了大幅度的提高。By using both the prediction model from transportation ministry and the fhwa models, the prediction results were analyzed for high ways at different sections, different design speeds, detection points, traffic volumes, distances, heights, and at various other road conditions. the prediction results and the actual results were compared and the accuracy of prediction were assessed
本文通過比較分析了fhwa預測模式和交通部預測模式在高速公路不同監測路段、設計時速、測點、車流量、距離、高差、地面狀況條件下的預測結果,並對預測結果和實測結果進行預測精度和變化趨勢的比較研究。Simulation of hypsometry accuracy using 4 - station tdoa
四站時差定位測高精度的模擬研究We can use the mm5 model in definite time, definite area weather forecasting. we conclude that : : the moving route of this necw in its developing progress was direct - south along latitude, the cold air is rough, and just this made the rough vertical velocity ; the necw southern moving and conflicting with the west pacification sub - tropical high makes rough jet steam. the plenty south - west warm and wet air made by the jet stream gave the rainstorm demanded vapor ;. the rough vertical velocity by jet stream is a main reason in this rainstorm ; the mm5 model uses four - direction analysis data as its input, this avoids some errors occurred in observe and transfer, thus made the result more useful
綜合分析認為: ( 1 ) 、這次冷渦在其發生發展過程中,其移動路徑是沿經圈直線南壓,攜帶的冷空氣勢力較強,形成槽后較強的垂直運動; ( 2 ) 、西太平洋副熱帶高壓偏北位置與東北冷渦南壓形成的急流軸,把源源不斷的西南暖濕氣流輸送到遼西地區,也就是急流軸的左前方位置,為這次暴雨的產生提供了充足的水汽來源; ( 3 ) 、低空急流不但為暴雨輸送水汽,其造成的較強的垂直環流也是產生強降水的一個主要原因; ( 4 ) 、 mm5模式以四維同化資料作為初始場,最大限度地避免了觀測誤差可能造成的積分不穩定,提高了模擬結果的參考價值。According to the engineering practice, the theoretical basis and method that survey directly the horizontal distance and height difference by the total station system as fourth grade and below fourth grade control network are put forward instead of surveying slant distance and zenith distance
摘要根據工程實踐,提出了用全站儀直接測量平距、高差來代替測斜距、天頂距作四等及四等以下控制網測量的理論依據和方法,並以張河灣抽水蓄能電站施工控制網為例進行了比較計算。Main conclusions drawn from the analyses of calculating results are as follows : ( 1 ) the microwave absorption of atmosphere gas have obvious attenuation at the wavelengths for cloud detection, thereinto, the water attenuation effect changes greatly, so the 94ghz cloud detecting radar should have water vapor attenuation correction scheme. ( 2 ) when 37ghz and 94ghz radars detect clouds, the difference between the atmosphere and cloud attenuation and the large variety of radar reflectivity conduce the intension of the radar backscatter signals change. ( 3 ) for the thin cloud layer and low water content of cloud, 37 - ghz radar backscatter signals are not as good as 94 - ghz radar, that is to say that the 94ghz radar has better capability in thin clouds detection
本工作得出如下結論: ( 1 )大氣氣體的微波吸收在測雲波段產生明顯的衰減,其中水汽衰減效應變化很大;即將上天的空間94ghz測雲雷達必須有水汽衰減訂正方案; ( 2 ) 37ghz和94ghz雷達測雲,由於大氣和雲衰減不同和雷達反射率的很大差異,導致雷達回波信號強弱不同; ( 3 )對雲層較薄、含水量較少的雲,在不計雷達參數的情況下, 37ghz雷達回波信號不如94ghz測雲雷達,也就是說94ghz對薄雲有更強的探測能力;對雲層較厚、含水量大的雲,由於強衰減的作用, 94ghz雷達回波信號小於37ghz雷達; ( 4 )從大氣衰減的不利因素方面考慮,空間94ghz雷達測高層薄雲的效果最好;測低層薄雲時需要考慮氣體衰減訂正;因濃厚雲的強衰減作用,探測其中下部的能力大大減弱,不僅要進行衰減訂正,而且要藉助其他信息來反演整個雲層的含水量垂直分佈; ( 5 )為了獲得從極薄到極濃厚雲的垂直分佈探測能力,未來測雲雷達系統最好採用雙波長甚至三波長(如94 、 37和13ghz ) 。Besides, the information on actual height of lowest cloud base is used in constructing of cloud liquid water profile by using radiosonde profiles, that makes an improvement of relative accuracy of retrieved value of l at almost all altitudes by 5 - 20 % according to numerical simulation comparison. the lower the altitude is, the more the accuracy is improved
為減少由於回歸樣本中雲液水廓線的『失真』給反演造成的誤差,本文在對探空廓線作診斷建立雲液水廓線時,引入了實際目測的最低雲底高的信息。數值模擬比較表明該措施行之有效,使對流層中下層的幾乎所有高度上l反演值的精度提高5 - 20 ,觀測高度越低,精度提高越多。In accordance with the main contradictions between high deterioration degree of coal and low permeability of coal bed, this paper predicts high permeability region by use of new technique and methods including stress field, curvature analysis and major stress difference analysis
針對沁水盆地煤變質程度高、煤層滲透率普遍較低的主要矛盾,利用新技術、新方法,利用應力場、曲率分析方法和主應力差分析方法預測高滲區。The scheme is designed based on these researches. for traditional laser rang finders, most of them use heterodyne method as the phase shift measurement. the advantage of heterodyne method is the high measurement accuracy, but its disadvantage is the low measurement velocity
傳統的相位激光測距大部分都採用差頻數字測相,差頻測相的優點在於由於頻率的降低,這樣必然意味著測距精度的提高,但其缺點是測距速率低。Experimental result indicates that the kgw - xx radio altimeter can provide steady height data at ultra - low altitude, so it can be used as an altitude sensor of a tow target system, and the height data shows a bigger ladder error that affects the precision of the tow target system
靜態模擬測高試驗結果表明:該高度表可在超低空狀態下提供穩定的高度數據,可以作為某型拖靶系統的高度傳感器;該高度表提供的高度數據存在著較大的階梯誤差,將影響拖靶系統的恆高精度。Results show that a three - stepwise weight function correction method is effective and applicable and can be spread in other basins. it can eliminate the outlier of rainfall data and improve the accuracy of flood forecast
計算結果表明,採用雨量觀測誤差三步權函數修正法是有效的,能準確剔除雨量資料的粗差,改善雨量資料的合理性,提高洪水預報的精度。According to the results of the field test, the accuracy of this method in predicting the occurrence of evaporation duct arrives at 80 %, the error of the average predicted evaporation duct height is about 28 % with each error ranging from 24. 6 % to 57. 6 % within the measurement height range
根據外場試驗的結果,其預測蒸發波導環境出現的準確率可達到80 ,對平均蒸發波導高度的預測誤差約為28 ,在試驗可測量的高度范圍內,不同蒸發波導高度的誤差在24 . 6 57 . 6之間。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。The results of the studies show that the size, length, and scope of tunnel lining crack can be identify by infrared thermography images
經實地檢測高雄市西子灣隧道和高雄縣大關山隧道,發現隧道襯砌之孔洞與裂縫部位,其紅外線熱影像溫度差異變化大於沒有孔洞裂縫之襯砌。Thirdly, in term of the results of testing and calculation, the displacement and libration, the difference of altitude, the flexibility and strain of crane - beams are all generally analysed, especially the reason why the crane - beams are attaint is lucubrated, and the reasons why the trigging pole is ruptured, the upper wingspan is damaged, the orbital movement, the exceptional incline of colums are open out, which has instructional significances that improve the design of the steel frame of the coke made by dry flameout
第三,根據檢測和計算結果,對鋼框架的位移和振動、框架高差、吊車梁撓度和應變等進行了全面的分析,特別對吊車梁系統的損傷原因進行了深入分析,揭示了制動桿件斷裂、上翼緣磨損、軌道竄動、柱異常傾斜等一系列損傷現象的原因,對于改進干熄焦鋼框架的設計有著直接的指導意義。The paper also discusses the examine method of the short circuit by using several different way. because of the high resistance input, measurement for the parameter of voltage have preferable precision
由於開路電壓和負載電壓的檢測處于高阻狀態,故其檢測誤差較小,本課題選擇了合適的a d ,達到較高的精度。The whole article consists of 6 parts : 1. object of the project and the development background of the relative technique are introduced. 2. the theory of the micro inertial heave height measurement is depicted. 3. arithmetic model base on matlab / simulink for micro inertial heave height measurement is offered, including the result analysis for the simulation. 4. the whole hardware design base on aduc841 single chip of the mimu data collection system is depicted. 5. software design is introduced. 6. adjusting and error compensation model of the mems is depicted. at last, sum - up, view and enhancement of the system are given
本論文分成六個部分:第一部分介紹了課題研究的目的及相關技術的發展概況;第二部分主要論述微慣性測高的理論基礎;第三部分給出微慣性測高演算法的matlab模擬模型及模擬結果分析;第四部分給出基於微慣性傳感器及aduc841單片機的微慣性數據採集系統的硬體設計及調試方案;第五部分為微慣性數據採集系統的軟體設計;第六部分介紹了微慣性傳感器的標定及誤差補償方法。Satellite laser altimeter return waveform is sensitive to the vertical canopy structure and the change of underlying ground elevation. it is optimal for mapping forest structure. the return waveform and the processing method are described. the relationship between laser waveform and canopy structure parameters is explored ignoring the clumping effects. the clumping caused that structure parameters are different from the actual value. to solve this question, a model by 3 - d canopy structure parameters is needed
星載激光測高儀的回波信號能夠靈敏反映地面植被組成和地表高度的變化,因此能夠用於探測森林地貌;首先對星載激光測高儀的森林回波信號及其處理方法進行了介紹,探討了在不考慮植被聚集情況下,植被組成與回波信號之間的關系;由於植被的聚集效應,例如樹葉群集成樹冠,會導致植被組成參數與真實值之間存在差異,這需要建立關於三維的空間分佈模型加以解決。Abstract : in view of the quantity examination of weld defect by ultrasonic, on the basis of theoretical analysis and test, the cause, composition and contriling method of error of crack defect size h have been analyzed systematically, a controlling and statistical method of ultrasolic examination error has been put forward. this method is simple and suitable, and has been verified by test
文摘:針對焊縫缺陷超聲波定量檢測,從理論分析與實驗出發,系統分析了裂紋類缺陷自身高度尺寸h的檢測誤差的物理成因、組成及誤差控制方法,提出了一套實用簡潔並經實驗證實可行的超聲波檢測誤差控制及統計方法。The gained snr is higher than the previous algorithm ’ s. a linear least square predictor is presented for the trajectory association algorithm. it can effectively reduce the prediction error and improve the trajectory detection probability
針對軌跡關聯匹配演算法中的軌跡預測誤差大的問題,採用多點最小二乘( ls )線性預測器加以改進,減小了軌跡的預測位置誤差,提高了目標軌跡的檢測概率。分享友人