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matric n.〔matriculation 之略〕大學入學考試。

matrices

Where several mother wavelet functions were used to expand a function , it also can be seen as vector - valued wavelets that satisfy conditions in which matrics are involved . the main works of this paper are as follows : firstly , although haar function has bad vanish property in frequency domain , it is the only normal orthonormal basis with symmetry and real short - support property 首先,討論了對于尺度函數,相應的母小波構成空間的標準正交基的充要條件,提出了構造a尺度母小波的算法,從理論上研究a尺度haar小波基的構造,提出了分解與重構公式,并對如何構造具有對稱性的a尺度haar小波基進行了探討。

According to unsaturated soil strength theory presented by fredlund , we have taken lead in establishing a formula of soil strength in beijing area ' s layers taking into consideration matric suction and the relationship between water content and matric suction . the change of water content is also a kind of disturbance from board angles 在國內,針對北京地區粉質砂土,根據fredlund提出的非飽和土強度理論,率先建立了考慮基質吸力影響的土的強度公式;吸力與含水量密切相關,從廣義擾動角度來說,含水量的變化也是對土的擾動。

Firstly , the author has researches on basic engineering properties of soil layers in tunneling construction , especially in the relationship between the changes of matric suction ( negative pore water pressure ) and soil strength data . the results have obviously shown on the control of soil strength to matric suction in the different suction 首先對地鐵隧道施工中環境土層基本工程性質進行了研究,著重研究了基質吸力(負孔隙水壓力)的變化和土的強度參數的關系,研究結果表明:在不同的吸力狀態下,土的強度都不同,土的強度明顯地受吸力控制。

One is based on the discriminated matrics , the other is based on ga . we use many new ways to make the algorithms more effective , such as reducing dimension and sparsiting elements of the discriminated matrics , effectively selecting elements of the positive examples set and the counter examples set for the jointing - spreading matrics , using a new selecting operator , and so on 其次,實現了基于粗集理論的屬性約簡方法? ?基于可分辨矩陣的屬性約簡法和基于遺傳算法的屬性約簡法,并通過降維、稀疏化、正例集和反例集的有效選取、新的選擇算子等方法對原算法進行了改進。

The effect of matric suction on the strength and deformation as well as water content of intact loess are studied in this paper . using the direct shear testing equipment and consolidation testing equipment and modified triaxial testing equipment in the university of logistical engineering in chunqing . 4 groups ( 16 specimens ) consolidated drained direct shear tests and 2 groups ( 6 specimens ) consolidated tests as well as 1 group ( 3 specimens ) triaxial shear tests with controling matric suction were conducted 用新研制的國內第一臺非飽和土固結儀、國內第一臺非飽和土直剪儀和經過改進的非飽和土三軸儀,做了4組16個非飽和土直剪試驗; 2組6個非飽和土固結試驗; 1組3個控制吸力的非飽和土三軸試驗。

( 3 ) when evaporation was stopped during the process of soil water redistribution , soil water would move downslope by gravity . when evaporation was in process , due to low initial water content , most infiltrated water from small intensity and amount of rainfall would be consumed by intensive evapotranspiration during rainy season , and lateral downslope unsaturated flow seldom took place . however , soil water would move downslope by gravitational and matric potential gradients after continuous rainfall ( 3 )在防止蒸發條件下,再分布過程中,土壤水分在重力的作用下有沿坡向下運移的趨勢;在蒸發條件下,由于初始含水量一般較低,雨季量小且分散的降雨極易為強烈的蒸發蒸騰所消耗,側向沿坡向下流難以發生,但在持續的降雨條件下,土壤水分在重力勢和基質勢梯度的作用下易沿坡向下運移。

In low matric potential state , the a & p model can be use to predict water retention characteristics , but in high matric potential state , it cannot get good result . in addition of soil pore connectivity , to correct the a & p model , it can get good result in whole water content range 但在高吸力段a & p模型預測的結果與實際偏差較大,考慮到土壤孔隙實際聯通狀況,修正a & p模型,使供試的四種在整個含水量范圍對土壤水分特征曲線都得到了較好的擬合。

The results in this study can be summarized by the following : ( 1 ) some difference of calculated soil hydraulic conductivity and soil matric potential are existed in different soil hydraulic models 研究結果表明:不同的土壤水力模式對土壤水力傳導率和土壤水勢的計算結果是有差異的,而這種差異會影響陸面模式中土壤濕度的模擬。

The results indicate that soil water moves from the warm end to the cool end in both gaseous and aqueous phases under temperature gradient , which causes changes of matric po 研究表明,在溫度勢梯度影響下土壤水分以液態和汽態兩種狀態從暖端向冷端遷移,從而引起暖端基質勢的相應改變,導致水分在兩種勢梯度交互作用下逐漸達到平衡。

Zannad f , alla f , dousset b , et al . limitation of excessive extracellular matric turn over may contribute to survival benefit of spironolactone therapy in patients with congestive heart failure . circulation , 2000 , 102 : 2700 程遠植.醛固酮拮抗劑螺內酯在慢性心衰的治療作用和應用進展.中華心血管雜志, 2003 , 31 : 69 - 71

The numerical analysis demonstrate that an safety factor of a loess slope increases with the matric suction . therefore , matric suction has an impertinent effect on the stability of a loess slope 研究表明:土坡穩定安全系數隨吸力增大而增大,從而證明了吸力對黃土邊坡的穩定性有重要影響。

All tests are done in gds triaxial testing system . in triaxial shear tests , pore air pressure and pore water pressure are measured separately and matric suction is calculated 在三軸剪切試驗中利用軸平移技術分別量測土樣孔隙氣壓力和孔隙水壓力,得到土樣基質吸力。

With relations of operators and matric , we will show that the inverse a - 1 of positive operator a is still a positive operator if and only if that a is a generalized permutation 利用算子和矩陣的關系,得到正算子t的逆是正算子的充要條件是t是廣義置換算子。

Infiltration mostly depended on matric potential gradient and the effect of upslope runoff could be omitted , when initial water content was very low 當初始含水量較低時,入滲主要受控于基質勢梯度的作用,上方來水對入滲幾乎沒有影響。

When my parents immigrated to south africa i was eight years old and went to an afrikaans school , i did my matric in afrikaans 八歲那年,我父母移民到了南非。我進入了一所非洲學校,我念大學的資格證也是在非洲獲得的。

The variation rule of strength parameters associated with the matric suction were studied 分析了強度參數隨吸力的變化規律和廣義土-水特征曲線的合理性。

Third , we propose a new way of decision rules extracting based on the discriminated matrics 再次,提出了一種基于可分辨矩陣的決策規則提取新方法。

One - dimensional constitutive model of unsaturated soil considering change of matric suction 考慮基質吸力變化時非飽和土的一維本構模型

Standard guide for measuring matric potential in vadose zone using tensiometers 拉力計測定滲流區矩陣勢能的標準指南