相對步高值 的英文怎麼說

中文拼音 [xiāngduìbùgāozhí]
相對步高值 英文
relative step heights
  • 相 : 相Ⅰ名詞1 （相貌; 外貌） looks; appearance 2 （坐、立等的姿態） bearing; posture 3 [物理學] （相位...
  • 對 : Ⅰ動詞1 （回答） answer; reply 2 （對待; 對付） treat; cope with; counter 3 （朝; 向; 面對） be tr...
  • 步 : Ⅰ名詞1 （步度; 腳步） pace; step 2 （階段） stage; step 3 （地步; 境地） condition; situation; st...
  • 高 : Ⅰ形容詞1 （從下向上距離大; 離地面遠） tall; high 2 （在一般標準或平均程度之上; 等級在上的） above...
  • 相對 : 1. （面對面） opposite; face to face 2. （非絕對的） relative 3. （比較的） relatively; comparatively
  1. It was restaurant industry graven topic that that of that of from input / output angle said, how advance restaurant kernel ability to compete, with the purpose of advance business economic benefit, as soon as possible brought return, accelerating demonetization end, abaft experience know clearly near twenty year stodgy state look forward to reform mechanism, our state hotel industry be around by babyhood trend maturity, by seller ' s market trend buyer ' s market, such transit should make part rational consumer enjoy to good value for money, too brought ought to part superficial restaurant taste to inevitable ; the government owned restaurant at multinational restaurant bloc and civilian battalion restaurant enterprise " dual impact down, calendar by know clearly reform of monetary system cum bank commercialization, market open cum solution control, market cum competitive mechanism three phase, owing to planned economy belated issues, structure irrationality wrought a matter of and overlapping investment wrought a matter of wait threefold cause, make government owned restaurant at market competition middle gradualness forfeiture competitive edge, in progression appearance hot water, how advance government owned hotel competitive power a matter of, toward me state tourism possess strong operation significance, hunan lotus hotel namely same family pole tool on government owned three stars level hotel behalf of the for the last years, by way of hotel industry occupy quite specific gravity

    從投入產出的角度講，如何提高飯店核心競爭能力，以達到提高企業經濟效益，盡快產生回報，加速貨幣回籠的目的，是飯店業嚴肅的話題。在經歷了近二十年步履艱難的國企改革歷程后，我國飯店業已開始由幼稚走向成熟，由賣方市場走向買方市場，這種轉變將使得部分理性的消費者享受到物有所值，也使部分膚淺的飯店品嘗到必然的失敗；近十年來，作為飯店業占相當比重的國有飯店在跨國飯店集團和民營飯店企業的雙重沖擊下，歷經了金融體制改革及銀行商業化、市場開放及解控、市場及競爭機制三個階段，由於計劃經濟遺留下來的問題、結構不合理造成的問題和重復投資造成的問題等三方面的原因，使得國有飯店在市場競爭中逐漸喪失競爭優勢，相繼出現困境，如何提高國有飯店競爭力的問題，對於我國旅遊業具有強烈的現實意義，湖南芙蓉賓館就是一家極具代表性的國有三星級飯店。
  2. And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

    研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。
  3. The late ordovician - silurian - devonian - early carboniferous stratigraphic division and correlation, including the chronologic correlation of the donghe sandstone, which are the old great difficult key stratigraphic problems interfering with the development of the oil and gas exploration in the tarim basin, are synthetic studied by systematically applying chemobiostratigraphy. several important relevant stratigraphic boundaries are recognized, and the donghe sandstone is attributed to the frasnian, late devonian. the results of the study in particular proves that chemo - biostratigraphy has great significance and is a practical tool for high resolution stratigraphic division and correlation, especially for the region and or the bed with rare fossils

    首次系統應用化學生物地層學對長期遺留的嚴重阻礙了油氣勘探開發步伐的塔里木盆地重大疑難地層問題：晚奧陶世志留紀泥盆紀早石炭世地層劃分對比和東河砂巖時代等進行了綜合研究，釐定了幾條重要的相關地層界線，並將東河砂巖的時代確定為泥盆紀晚泥盆世弗拉斯期。這些研究成果表明，化學生物地層學對高解析度地層劃分對比尤其是對在化石缺乏地區和層段進行地層劃分對比工作有重要的意義和實用價值。
  4. 2. an optimal design that is good for individual function can be realized through adjusting the adding authority gene to have the dispart objective functions given up to each other if certain targets are to be improved during optimization calculating

    2 、在優化計算時，要想使某項指標提高，可以通過調整加權因子來實現，使各分目標相互作出一些讓步，以取得一個對于各分目標函數值都比較好的最優方案。
  5. Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows : ( 1 ) reviewed entirely the origin and evolvement of the concept " sustainable development ", stated and commented the study status in queue on " sustainable development " around national and international range, thorough discussed the science connotation about the concept " sustainable development " ; ( 2 ) looked back and commented across - the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings ; ( 3 ) expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory ; ( 4 ) thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the matlab software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the b - j method and morte - carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources ; ( 5 ) synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming mathematical statistics random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality ; ( 6 ) analyzed the inside condition and outside condition to assure the sustainable and optimum exploi tation of groundwater resources, the inside conditions are the follows : correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows : the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water - saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology ; ( 7 ) scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy ; lint out the more directions on groundwater resources

    基於以上考慮，論文主要從以下幾方面對地下水資源可持續開發問題進行了比較深入的探討：全面回顧了「可持續發展」概念的由來與演變，對國內外「可持續發展」的研究現狀進行了述評，並對「可持續發展」概念的科學內涵進行了深入探討；對涉及地下水資源的一些最基本的概念和命題進行了全面的回顧和評述，對目前仍然存在的一些錯誤觀點和混亂認識提出了自己的見解；全面闡述了地下水資源變值系統理論的內容和意義，並與傳統的地下水資源計算評價方法進行了對比分析，結合實例具體說明了方法的應用；深入分析了地下水資源預測預報工作的極端重要性和復雜性，對傳統的地下水資源動態預測方法進行了全面的評述，指出了各類預測預報方法的特點及適用條件，對最近二十多年剛發展起來的小波分析技術的主要思想和方法及其應用范圍，以及號稱第五代計算機語言的matlab軟體和附帶的小波分析工具箱進行了介紹，並應用於地下水動態過程線的分析，採用時間序列中的b ? j法，蒙特卡羅方法，與地下水資源變值系統理論相結合，探討了地下水動態資料分析和地下水資源預測預報的新思路；綜合分析了現今各類地下水管理模型的特點及缺陷，將數學規劃、數理統計、隨機過程等與地下水變值系統理論相結合進行地表水地下水或多水源的聯合優化調度，使模型更準確、更實用；對保證地下水資源可持續開發的內部條件和外部條件進行了分析，內部河海人學博卜學位論文前言、摘要、目錄條件主要是正確的資源觀，科學的資源計算與評價方法，可靠的資源預測預報技術，可操作的資源管理措施，外部條件主要是高層發展思路、管理體制的變革、配套的政策法規、經濟杠桿的調節、人文素質的提高、節水意識的增強及具體節水措施、人口增長的控制、水體污染的防治、生態的恢復和重建等;從宇宙科學、地球系統科學及哲學的高度審視地下水資源的可持續開發;指出了地下水資源可持續開發的進一步研究方向。
  6. Besides, this paper adopts the random finite element method, uses geometric and physical mechanical parameters that are relevant to lining weight of surrounding rock, coefficient of lateral pressure, height or buried depth of vertical loading, elastic resistance coefficients of surrounding rock, elastic modulus of support structure, unit weight of concrete, thickness of the structure as well as torsional strength and compression strength of concrete and etc., as random variables, applies the monte - carlo method to sampling by computer, preliminarily evaluates the reliability of bearing capacity and stability of molded concrete lining of the xuefeng mountain tunnel, and obtains the related displacement of the lining, mean value and variance of internal force, and computed the reliability index of lining structures

    此外，本文採用隨機有限元方法，將圍巖容重、側壓力系數、垂直荷載高度或埋深、圍巖的彈性抗力系數、支護結構的彈性模量、混凝土容重、結構的厚度以及混凝土的抗扭與抗壓強度等與襯砌結構有關的幾何與物理力學參數作為隨機變量，應用蒙特卡洛理論進行計算機隨機取樣，對雪峰山隧道模注混凝土襯砌的承載力與穩定性的可靠度進行了初步評估，得出了襯砌的相關位移與內力的均值和方差，並計算出了相應的襯砌結構可靠指標。
  7. The recombinants were constructed by transforming ppic9 a - xynb into p. pastoris gs115. the assay results revealed that the xylanase gene xynb was overexpressed and secreted effectually in p. pastoris. in 3l fermentor the expression level of xylanase xynba exceeded 1200iu / ml and the expressed xylanase had normal bioactivity. the molecule weight of xynba was determined as about 31kd which is higher than 23kd of original enzyme xynb from streptomyces olivaceoviridis a1. xynbb was gotten by deglycasylation of xynba, whose molecule weight returned to 23kd. we comparised the enzymatic properties of xynba expressed in p. pastoris, xynbb deglycasylated from xynba and xynb produced from streptomyces olivaceoviridis al : there was little difference among the three enzymes on optimal ph, the optimal ph of xynb and xynba were both 5. 2, the optimal ph of xynbb was 5. 0 ; the optimal temperature of xynb and xynba were both 60 c, while the optimal temperature of xynbb was 50 ? ; because of glycosylation the thermal stability of xynba was better than xynb and xynbb ; the specific activity of xynba and xynbb were 883. 88iu / mg and 832. 5hu / mg respectively, which were both lower than 2814. 45iu / mg of xynb ; the km values of xynb and xynba were similar to each other which were 21. 56 ( g / kg ) and 20. 87 ( g / kg ), while the km value of xynbb was 27. 10 ( g / kg ) ; the fmax of xynba and xynbb were 4568umol / mg. min and 5329umol / mg. min respectively which were lower than 27623 umol / mg. min of xynb ; additionally all of the three enzymes did not display cellulase activity. they all had well resistance to pepsion and trypsin, and were not sensitive to metal iron, surface active agent and chelating agent. the analysis of different xylans enzymatic hydrolysate revealed : by xynba, that the main constitutions of enzymatic hydrolysate of birch wood xylans were xylotriose and xyloquaiose, which account for 68. 43 % and 16. 50 % respectively, additionally there was 11. 79 % of xylobiose ; the main constitutions of enzymatic hydrolysate of corncobs xylans were xylobiose and xylotriose, which account for 81. 78 % and 11. 55 %. the result indicated that this xylanase was a kind of 1, 4 - b - d - xylanohydrolase and was fit to used in industrial procession of xylooligosacc harides

    進一步對xynba進行了脫糖基化處理得到xynbb ，其分子量恢復到23kd ，證明xynba是糖基化蛋白。通過對畢赤酵母重組表達的木聚糖酶xynba 、脫糖基化的木聚糖酶xynbb以及橄欖綠鏈黴菌a1所產原酶xynb之間酶學性質的比較發現：三種酶的最適ph差異不大， xynb和xynba均為5 . 2 ， xynbb為5 . 0 ； xynb和xynba的最適溫度均為60 ， xynbb降為50 ：在耐熱性上， xynba由於糖基化作用熱穩定性明顯高於未糖基化的xynb和xynbb ； xynba和xynbb的比活性分別為883 . 88iu mg和832 . 51iu mg ，明顯低於原酶的比活2814 . 45iu mg ； xynb和xynba的km值相當，分別為21 . 56 （ g kg ）和20 . 87 （ g kg ） ，而xynbb的km值較大為27 . 10 （ g kg ） ； xynba和xynbb的vmax相差不大，分別為4568 mol mg ? min和5329 mol mg ? min ，明顯低於xynb的27623 mol mg ? min此外三種酶均無纖維素酶活性，對胃蛋白酶和胰蛋白酶有很好的抗性，且對作用環境中的各種離子、表面活性劑、螯合劑不敏感。通過對不同木聚糖的酶解產物的糖份分析發現：以樺木木聚糖為底物時，酶解產物主要為木三糖和木四糖，含量分別為68 . 43和16 . 50 ，另外還含有11 . 79的木二糖；以玉米芯木聚糖為底物時，酶解產物主要為木二糖和木三糖，含量分別為81 . 78和11 . 55 。
  8. With the purpose of better understanding some weak links in this subject, we comprehensively and systematically compared the effects of some typical inhibitors and their different combined ways in inhibiting cd bioavailability in purple soil, further studied the laws and affecting factors of cd ' s transfer and transformation in soil - plant system, revealed the mechanisms inhibitors function, and explored the practicable inhibitor prescriptions and their usage. the results are expected to provide reliable techniques for controlling cd pollution of agricultural soils in chongqing and it is also significant to ameliorate soils polluted by other kinds of heavy metals. comprehensive methods including pot experiment, laboratory culture experiment, kinetic and thermodynamic adsorption - desorption experiment were adopted in this study, and the acidified purple soil was chosen to test, considering that cd is highly active in this soil

    本研究針對重慶市農業土壤的污染狀況，選取鎘活性較高的酸化紫色土為供試土壤，採用盆栽試驗、培養試驗、化學熱力學與動力學吸附試驗相結合的方法，系統研究和比較多種調控劑及其不同組合方式對鎘生物活性的效應，並揭示鎘在土壤?植物系統中的遷移轉化規律及影響因素，進一步分析調控劑的作用機理，探尋具有實際應用價值的調控劑配方及合理使用的方法，這不僅可以為重慶市農業土壤鎘污染的防治提供可靠的技術保障，而且對于其它重金屬污染的治理也有一定的理論意義。
  9. Moreover, this paper discusses the feasibility of option pricing theory by adopting cases. on the one hand, it admits this method plays a key role in the realization of " debt - in - lieu - of - equity " of state - owned enterprises and appraising the value of potential earning - capacity ; on the other hand, it illustrates the application of option pricing theory in appraisal is still immature. for it can not meet the prerequisite of the theory ; its result will not be generally accepted and the quality of appraisal staff are relatively lower, this method is not applicable to business valuation aiming at equity alteration. thus it should not be regarded as a brand - new appraisal method to be promot ed in the short run. in the finial the thesis forms its conclusion on method application of superseding cost method gradually. generalizing the use of income method and developing the sense of using option pricing method

    由於成本法所固有的局限性，無法評估出資產組配成具有獲利能力的整體資產的創造性價值，因此注重企業獲利能力的收益法已成為轉軌時期中國評估業的現實選擇，並進一步對收益法的起源、方法特點和適用性進行了深入的分析；運用理性分析與案例分析相結合的方法對收益法發展的新階段? ?期權定價法應用於企業價值評估的可行性進行了研究，肯定了這一方法對國企實現「債轉股」和評估高新技術企業潛在獲利能力價值的重大意義，同時對此方法應用於企業價值評估不滿足前提條件、評估結果的可接受性、及評估人員素質等方面說明了這一方法在資產評估領域的應用尚不成熟，尤其不適用於產權變動為目的的企業價值評估，因而短期內不宜作為一種全新的評估方法推廣。
  10. Severe cumulus precipitation of 3h center appear in the left side of positive stonn - relative helicity center, i. e. positive storm - relative helicity center is not synchronization with cumulus precipitation center of 3h, the cumulus precipitation center of 3h falls behind the positive storm - relative helicity center

    在正的相對螺旋度中心的左側， 3小時后出現3h積雲降水量的高值中心，也就是說正的相對螺旋度中心和3h積雲降水中心不同步， 3h積雲降水中心落後于相對螺旋度中心。
  11. The content in this paper is preparatory attempt that combines image technique and gas water field measurement technology. this research make strong base for the further application of image technique in two phases flow of gas - water and has significant learning and practicable value

    研究成果為今後進一步深入研究和推廣計算機圖像處理技術在水氣兩相流測量中的應用，打下了有力的基礎;對提高水流摻氣濃度的測量水平和精度，進而提高水力模型試驗水平、滿足工程設計要求等都具有學術意義和重要實用價值。
  12. Doing the further research on the division frequency stack on the foundation of study of predecessor, at first the residual moveout correction is done to the seismic record, make the phase axle regularity, doing foundation for the same phase stack ; then carried on division scale processing by wavelet transform ; spectrum whitening is done to each scale, the high and low frequency band need to do prolongs, the middle frequency bands only increase the value of the frequency spectrum ; several kinds of methods that estimate the value of signal - noise ratio has been studied further, and summarize their advantage and disadvantage as well as the scope of application ; the seismic record after spectrum whitening is stacked by weighting with the value of the signal - noise ratio ; then estimate the value of signal - noise ratio which is each scale section after stacking, the scale that the signal - noise ratio is big is assigned big weighting, otherwise, the scale that signal - noise ratio value is small is assigned small weight ing, and carried on weighted reconstruct to each scale section

    本文在前人研究的基礎上，在分頻疊加方面做了進一步的研究。首先對地震記錄進行剩餘時差校正，校齊同相軸，為同相疊加做好基礎工作；然後對地震記錄用小波變換的方法進行分尺度處理；對各個尺度分別做譜白化，對于高、低頻段需要做頻帶延拓，中間頻段僅提升頻譜值；對于幾種信噪比定量估計的方法進行了深入的研究，並且總結了它們的優缺點以及適用范圍；對譜白化后的地震記錄用信噪比估計值作為加權系數進行加權疊加；對于各尺度的疊加剖面也進行信噪比估計，對于信噪比大的尺度給予大的加權系數，反之，信噪比值小的尺度給予小的加權系數，對各尺度疊加剖面進行加權重構。
  13. To accept the current signal from high negative voltage circuit, the analog ground is raised to a certain positive voltage, which makes it possible for the signal amplitude to be compressed at the same time of its polarity reversion. a pi control program special for laser gyro current control is brought forward according to the conventional pid control method, in which the control signal is figured out corresponding to the difference between the sample and the reference value by turn of proportion - short step integral - long step integral. and at the end of this paper, a comparison of system performance on different conditions is made and the key elements influencing system performance are educed

    利用集成a / d 、 d / a轉換器的新型晶元aduc824 ，實現了電流（電壓）采樣?數據處理?電流控制的閉環控制結構；地電位的抬升解決了a / d轉換器對負高壓迴路電流采樣時的輸入范圍匹配問題；控制信號反相的同時進行幅度壓縮，使得輸出調整電壓的解析度提高；根據常規的比例?積分?微分（ pid ）調節模型，針對陀螺系統的特性，給出了一種可以滿足系統要求、據采樣值偏差大小進行的比例?大步長積分?小步長積分、分層次比例?積分演算法；不同條件下系統穩流性能的對比、分析在論文最後給出，並據此找出了決定該系統穩流精度的關鍵因素，提出了系統的改進意見。
  14. Detailed numerical simulation of krain impeller at design operating condition is made, the computed results, such as circumferentially averaged shroud static pressure distribution, meridional velocity and relative flow angel et al., show good agreement with experimental data

    對krain高速離心葉輪在設計工況下的內部流場進行了詳細的數值模擬，計算所得輪蓋壓力分佈、子午速度及相對氣流角分佈與實驗結果吻合較好，並且進一步加深了對二次流機理的認識。
  15. It compares and analyses the equipment test voltage emendated to standard atmosphere conditions with the equipment nominal withstanding voltage. and then it concluded that : the emendation value educed by " humidity ratio " integrated emendation method is basically equal or close to the equipment nominal withstanding voltage ; but the values by two traditional emendation methods are mostly higher. it also proves that, " humidity ratio " integrated emendation method is more perfect than any other methods, and it can reflect the influence degree of atmospheric parameters on electrical equipment outer insulation discharge voltage actually

    文中選擇「比濕」綜合校正法和兩種傳統校正法，分別對西高所為羊八井、拉薩、羊湖110kv變電所設備所做的人工氣候室模擬試驗數據及雲南中試所做的zs - 110工頻放電電壓試驗數據進行校正計算，將試驗電壓的校正值與試驗設備的標稱耐受電壓水平進行比較分析；認為： 「比濕」綜合校正法的校正值與設備耐受電壓水平基本相等或接近，而兩傳統校正法的校正值大多高於設備耐受電壓水平；進一步證明， 「比濕」綜合校正法是目前諸多校正法中較為完善的，能真實地反映大氣參數對電氣設備外絕緣放電電壓的影響程度的校正法，在高海拔電力工程設計中應推廣應用。
  16. This short period of recovery time can be used to decode transmitted message in the receiver. our numerical simulations for chaotic communication in single - mode and multi - mode laser systems show the feasibility of the schemes respectively. in two multi - mode lasers, the scheme of chaotic communication can enhance the privacy

    我們分別對單模激光系統混沌同步通訊和多模激光系統混沌同步通訊進行了相應的數值模擬，數值模擬的結果表明，這種利用混沌同步進行保密通訊的方案是可行的，在多模激光系統中的混沌通訊還可以大大提高保密度。
  17. This paper firstly presents the impact basic theories and the applying method for the general engineering fem software system - ansys, then the preliminary numerical simulation has been conducted in the mechanical process of the laminated composite plates subjecting to the impacting loads, the higher - velocity hit between the composite shells and the metal structures, the bird - impact radar cover experiment is also included. changes of the mechanical values in subjecting to different impact loads are also analyzed

    而後通過對復合材料結構層合板遭受沖擊載荷作用、球殼與金屬板的高速撞擊，以及雷達罩鳥撞實驗等力學過程進行了初步數值模擬，分析了主要的力學參數量在承受不同沖擊變量時的變化，並為部分理論計算找出了相應的實驗依據。
  18. However, its greenhouse warming potential ( gwp ) is relatively high among the newly developed hydroflourocarbons ( hfcs ), which seems to be an obstacle for the furtherance of the use of r - 134a, especially in european countries

    然而，在新近發展的hfcs類物質中，它的gwp值相對較高，這就阻礙了它的進一步使用，特別是在歐洲國家。
  19. It is shown that the target export rebate system should be established through five facets : the reform of the value - added tax ( vat ) system, the setting of the rebate rate, the unification of the administrative measure of the export rebate, the optimization of the rebate fiscal burden and the strengthen of the administration of the export rebate, which can ultimately acquire the least rebate cost and the maximum rebate benefit. to be detail, first, the existing vat system should be reformed, the vat system should be transformed from the production model to consumption model and the administration of levying tax should be strengthened, which can establish a good basis for the optimization of the export rebate system ; second, after considering the national and international practical situation comprehensively, the suitable rebate rate which is combined " neutral and different " should be chosen, and a set of elastic system of rebate rate which has both relative stability and timing flexibility should be establish ed ; third, with the further deepening of the reform of foreign trade system and the gradual improvement of the ability of the administration of the export rebate, the existing two kinds of administrative measures should be gradually transited to the single measure - " exemption, credit and rebate " ; forth, the existing sharing measure of vat should be innovated, the new rebate burden system - " first rebate then share " should be built ; fifth, a set of stimulation and restriction system of export enterprises and tax authorities should be built to strengthen the administration of export rebate effectively

    研究表明，我國目標出口退稅機制需要從五個方面進行構建：即增值稅制度改革、退稅率設置、退稅管理辦法統一、退稅財政分擔優化和退稅管理的強化，最終方可達到總體退稅成本最低和退稅收益的最大化。更具體地說，一是改革現行增值稅制度，將我國增值稅制度由生產型逐步轉為消費型，並強化征稅管理，為退稅機制的優化奠定基礎；二是在綜合考慮國內國際實際情況的前提條件下，選擇適宜我國的「中性與非中性」相結合的退稅率，並建立一套具有相對穩定性和適時靈活性的彈性退稅率機制；三是伴隨著外貿體制改革的進一步深化和退稅管理能力的逐步提高，將現行兩種出口退稅管理辦法逐步過渡到以「免、抵、退」為主的單一管理辦法；四是改革現行增值稅共享辦法，建立「先退稅后共享」的新型退稅負擔機制；五是建立一套針對出口企業和稅務機關的激勵約束機制，有效強化出口退稅的管理。
  20. A study and experiment on severe rainfall with numerical weather forecast in ningxia using geostationary meteorological satellite infrared data in order to improve the ability of torrent rainfall forecast in ningxia, which locates in northwest of china with an arid climate, the relationship between geostationary meteorological satellite infrared data and summer hourly precipitation in ningxia was analyzed, the geostationary meteorological satellite infrared data were applied to retrieve the relative humidity at medium and low layers of atmosphere

    強降水預報是中尺度數值預報的難點之一。為了提高數值預報模式對位於中國西北乾旱地區寧夏的強降水預報能力，本文研究了地球同步氣象衛星紅外資料與寧夏夏季逐時降水的關系。應用地球同步氣象衛星紅外資料，通過優選人工神經網路和最優擬合后的非線性回歸這兩種非線性方法，反演了寧夏自地表到300hpa不同層次的相對濕度。
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