A finite element incremental weighted iteration method, which can avoid divergency and speed up the convergence process,was proposed to solve the problems of tubing buckling in deviated wells.

建立了直井中有重鉆柱非線性屈曲平衡方程及相應(yīng)的泛函表達(dá)式，構(gòu)造了一種能避免發(fā)散并加速收斂的有限元增量加權(quán)迭代法求解斜直井中鉆柱屈曲問題，首次采用直接求解非線性特征值的方法來分析鉆柱屈曲問題。

In the existing buckling analysis of drill stem in horizontal condition,the drill stem is thought of as an even rod with equal diameter and sticked on the below wall of well on the action of deadweight,so it was simplified as simply supported beam compressed axially and supported evenly along its length by well wall.

在現(xiàn)有的水平狀態(tài)下鉆柱屈曲研究中国产v亚洲v日韩v欧美v天堂Ⅴ，一般把鉆柱看作均勻的等直徑桿，認(rèn)為鉆柱在其自重的作用下老熟精品视频在线观看，緊貼下井壁山外精品影院，因而通常把水平狀態(tài)下的鉆柱簡化為在整個長度上受到井壁均勻支承的軸向受壓的簡支梁。

" Order :In Classical architecture, any of several styles defined by the particular type of column, base, capital, and entablature they use"

柱式：古典建筑中国产婷婷在线，幾種風(fēng)格的柱式的總稱亚洲视频86p，特別是以所使用的柱、柱礎(chǔ)亚洲综合在线图片、柱頭和檐部的式樣來定義国产高潮流白浆A片免费一区二区。

"Order:In Classical architecture , any of several styles defined by the particular type of column, Base, capital, and entablature they use"

柱式：古典建筑中，幾種風(fēng)格的柱式的總稱黄片vs毛片，特別是以所使用的柱、柱

Supporting type is suggested to be developed into 3-prop to improve adaptability besides 2-prop and 4-prop. The difference of caving difficulty degree of coal seam is the base of caving coal method at high, medium and low position. Caving with small step and open caving flashboard used widely not only cause serious mixture of coal and rock but also hinder the improvement of top coal recovery. So we suggest caving with large step or closing caving door. Four-bar-mechanism of hydraulic support restricts development of new style caving powered support. Stabilization framework of expansion link and all-shield caving tail beam at high, medium and low position are introduced here.

支架支護(hù)型式97国产精品免费视频，除了兩柱国产嫖娼妓院视频网站、四柱以外，建議開發(fā)三柱支架以改善適應(yīng)性男女爱爱免费超爽大片黄；煤層冒放性的差異亚洲视频二区三区，是高位、中位和低位放煤方法存在和使用的依據(jù)91av色片在线；目前廣泛采用的小步距放煤和開放式放煤插板不僅造成嚴(yán)重混矸漏矸亚洲激情黄色视频，也妨礙頂煤回收率的進(jìn)一步提高，建議采用大步距放煤和可關(guān)閉放煤口亚洲第一区色色色；液壓支架四連桿穩(wěn)定機(jī)構(gòu)插抽视频，制約了新型放頂煤液壓支架的開發(fā)，介紹了液壓支架伸縮桿穩(wěn)定機(jī)構(gòu)及全掩護(hù)拖移高位一级AAA毛片无码视频、中位和低位放煤尾梁污污黄色美女视频网站。

HPLC was used to determine harmine concentration in the oral emulsion or in tissues of mice. Stationary phase: Shim pack CLC ODS column; mobile phase: acetonitribe methanol phosphate buffer (pH6.8)(30∶30∶40); mobile speed: 1.0 mL/min; detection wavelength: 300 nm; column temperature: 20℃.

采用高效液相色譜法測定口服乳劑中的harmine含量和各臟器組織中的藥物濃度；色譜柱Shim pack CLC ODS柱欧美性爱大屁股，流動相為ψ［乙腈∶甲醇∶磷酸鹽緩沖液（pH6.8）］=30∶30∶40国产女人网站，流速1.0 mL/min，檢測波長300 nm，柱溫為室溫欧美国产美女性爱在线。

The result showed that there's inconsistence existed between the extension and intension concepts before the treatment of concept change. For instance, less than 10% of the pupils thought that the oblique prism is prism in the task of property judgment. Yet, there's approx 60% pupils choosing the oblique prism as the prism in the classified task.

結(jié)果顯示黄色网站在线观看2019，概念改變活動前學(xué)童在非典型正例和非例部份，外延性和內(nèi)涵性概念存在不一致的現(xiàn)象直接观看的黄色网页，例如在性質(zhì)判別作業(yè)中認(rèn)為斜角柱可以是角柱的學(xué)童不到10%日韩精品火爆视频在线观看网站，但在選圖作業(yè)卻有約60%的學(xué)童圈選斜角柱為角柱。

Firstly by using volume exclusion chromatography and cation exchange column,sugar molecular-weight distribution and the contents of monosaccharide, disaccharide andtrisaccharide in rice wine were determined. And then by using amino-bonding phasecolumn,the contents of three functional oligosaccharide (isomaltose, panose, isomaltotriose)in shaoxing rice wine of different years and different processes were determined andstudied.

在應(yīng)用體積排阻色譜柱和鈣型陽離子交換柱測定了黃酒樣中糖分的分子量分布和單99草在线视频观看、雙欧插网免费看的视频、三糖含量的基礎(chǔ)上，利用氨基鍵合相柱對不同年份和不同工藝的紹興黃酒樣中異麥芽糖国产露出网站、潘糖成在线人黄页免费视频、異麥芽三糖三種功能性低聚糖進(jìn)行了定量分析研究。

Research on water hammer with gas in pressure conduit system Through physical experiments, researches on pressure conduit system with gas releasing and liquid column separating, which consist of observing flow patterns, testing the conditions under which liquid column separation brings into existence and the water hammer in water interception collision, and studying effects resulting from gas content and different water velocities in pipeline, was done.

輸水管道系統(tǒng)中含氣水錘研究通過物理試驗欧美一级视频网站，對有壓輸水管道系統(tǒng)中的氣體釋放與液柱分離進(jìn)行了研究亚洲日韩在线视频，觀察其流態(tài)、測試液柱分離發(fā)生的條件及斷流彌合水錘壓力国产91九色视频，研究了含氣量三级黄色一级视频,黄色一级视频、流速等參數(shù)對液柱分離的影響。

In this paper, the feasibility of pile with high bearing capacity, such as post-grouting bored concrete pile, pedestal pile, huge pile and so on, used in top-down construction is studied. The construction speed increase of structure above ground i...

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