In this paper,a numerical solution for radial journal bearings with liquid hydro-dynamic lubrication is analysed, numerical expressions for oil fiton pressure, bearing capacity , friction moment,and leakage at the bearing ends are derived,bearing capacity,flow rate, friction moment,and eccentric angle of the load under 14 different temperatures and 14 different load eccentricities are calculated.

采用數(shù)值法分析解算液體動壓向心滑動軸承国产综合一区二区三区精品，推導(dǎo)了油膜壓力日本片一级、承載力、摩擦力矩和端泄流量等的數(shù)值表達形式，計算了14個不同溫度點及14種不同偏心率下的承載力91久久精品国产91性色tv、流量外国人人操人人肏、摩擦力矩、載荷偏位角国产熟女高精品裸交视频，并通過AUTOCAD繪制了它們之間的影響曲線国产直播视频A片。認為偏心率及油溫對承載力影響很大，設(shè)計時應(yīng)加以限制欧美日韩精品巨乳中文字幕。

At present, optical precision instruments, including high-precision digital Autocollimator, goniometer, automatic optical focal length of the device, eccentric parallel devices and fluorescent tubes, etc., while providing for the optical, infrared and mechanical measurement of the field of customized products and programs, through international ISO9001 quality certification system.

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Three main error sources are the variation of intensities, the orientation errors associated with the configurations of the polariscope and the initial stress existing in the model.

在五步彩色相移法確定等傾角的過程中，主要誤差源有起偏鏡或分析鏡的方位角不準(zhǔn)確丝袜巨乳电影、模型因邊緣效應(yīng)而產(chǎn)生的初應(yīng)力和平面偏振儀光學(xué)系統(tǒng)中的光強變化超碰在线播放平台。

By thermally bonding the YAG crystal with 2 mm thick Nd∶YAG crystal,the Porro prism supplies multi-functions such as laser amplification,closuring the light path,polarization sensitivity to the 946 nm and so on.

直角棱鏡由無摻雜的YAG晶體和2 mm厚的Nd∶YAG晶體熱鍵合形成，可提供激光增益在线a亚洲视频播放在线观看、光路閉合及對946 nm激光起偏等多種復(fù)合功能色呦呦在线国产亚洲。角錐棱鏡由熔融石英材料構(gòu)成，在環(huán)形永磁鐵作用下www.麻豆视频.com，提供法拉第旋轉(zhuǎn)作用欧洲日逼电影。

On the basis of the achieved result and the effect of stress such as minor principal stress, intermediate principal stress, hydrostatic pressure, stress Lode degree, a generalized hyperbolic failure function adapted naturally with the envelope form of Mohr-Coulomb criterion is proposed for brittle rocks; and a smooth failure function acquired by Yu Maohong is also presented. Thus, a generalized polyaxial strain energy strength criterion is created.

在分析脆性巖石強度的靜水壓力、中間主應(yīng)力插精品人妻、最小主應(yīng)力以及應(yīng)力Lode角等4種效應(yīng)的基礎(chǔ)上久久精品国产99精品国产2021，提出子午面上與Mohr-Coulomb準(zhǔn)則包絡(luò)線自然銜接的廣義雙曲線型破壞函數(shù)及八面體偏平面上光滑角隅型破壞函數(shù)，從而建立非線性廣義多軸應(yīng)變能強度準(zhǔn)則国产2021三级片。

Recently, a nearly E-W-striking, over 10 km long albitite zone has been recognized for the first time in the Lower Silurian Meiziya Formation in a Lower Paleozoic lead-zinc ore deposit concentration area of the Xunyang basin, South Qinling. It shows a conformable contact and gradational relationships with the country rocks and has thick-bedded and massive, banded, brecciated structures and fine and very fine equigranular and intraclastic textures. It is chemically characterized by enrichment in SiO2, Al2O3 and Na2O and is rich in the trace elements Fe and Mn and poor in the trace elements Co, Ni and Cu. Its ∑REE, LREE and HREE are lower than those of the country rocks and exhibit pronounced Eu depletion.

最近黄色网站点击进入影院，在南秦嶺旬陽盆地下古生界鉛鋅礦集區(qū)內(nèi)的志留系梅子埡組地層中首次識別出一條近東西方向延伸長達10余千米的鈉長石沉積巖帶，與地層整合產(chǎn)出激情乱小说在线观看，漸變過渡国产黄特级视频A片，厚層塊狀，條帶狀免费黄色视频不用下载在线观看，角礫狀構(gòu)造99久久久无码，均粒微-細晶結(jié)構(gòu)，內(nèi)碎屑結(jié)構(gòu)性色AV免费不卡无码；其化學(xué)成分以富含SiO2狂野欧美男人的天堂网站，Al2O3及Na2O為特征免费看A片直接打开，富Fe，Mn最新狼友网址，貧Co尤物精品国产综合久久9420，Ni，Cu等微量元素国产尤物视频在线；該鈉長石巖的∑REE九色popny200，LREE，HREE均較圍巖偏低新久久黄色视频，具明顯Eu虧損的特征国产在线精选免费。

This dissertation makes horizontal well and symmetric multibranch horizontal wells as research object, according to reservoir characteristics and the seepage process of horizontal well, using multidisciplinary knowledges comprehensively including reservoir geology, reservoir seepage theory, point source function, Green function, conformal transformation, partial differential equation and computational mathematics et al, then researches theory and method suitable for describing seepage process and productivlty calculation of horizontal well.

本文以水平井和對稱多分支水平井為研究對象，從油氣藏的儲層特征和水平井的滲流過程出發(fā)久久综合一色综合久久小蛇，綜合運用油氣藏地質(zhì)操操干操干、油氣藏滲流理論、點源函數(shù)亚洲A级黄片在线、Green函數(shù)、保角變換人妻AV无码系列专区移动可看、偏微分方程及計算數(shù)學(xué)等多學(xué)科知識18禁黄网站禁片无遮挡，研究出適合于描述水平井滲流與產(chǎn)能計算的理論與方法，主要取得了以下成果

Self-fluxing Fe-Cr-Ni-B-Si alloy prowders are laser clad on medium carbon steel substrate of dimensions 80×35×10mm〓. The investigation results of this clad layer are: micro-defects, micro-cavity and occluded forin substance, are the micro-cracks and crack resourses in clad layer; crack of coating propagates along the boundary of two kinds of eutectic sutructure; The included angle θ between the cracking direction and laser scanning direction in multitrack overlapping clad is smaller than that in one-track clad because of crack propagating along crystalline growth direction and crystalline direction in overlapping zone being different from it in one-track clad.

在調(diào)質(zhì)態(tài)的45〓鋼表面在线资源av网站，采用預(yù)置粉末法進行FeCrNiBSi合金的多道搭接激光熔覆永久黄网站色视频免费大全91，對其熔覆層進行分析表明：多道搭接激光熔覆層裂紋擴展方向與激光掃描方向間的夾角θ與單道熔覆時相比明顯變小，前者θ0°欧美日韩一级特黄大片在线直播，后者θ角基本都為90°青青青草视，這主要是因為多道搭接時，搭接區(qū)結(jié)晶方向發(fā)生了變化以及裂紋沿結(jié)晶方向擴展所致超碰在人人操；激光熔覆層裂紋大多是以覆層與基材交界面的孔洞精品在线精品视频、熔覆層內(nèi)不同方向共晶團間的顯微縮孔、夾雜物的邊界等三種顯微缺陷作為裂紋源99久久免费看,视频，并沿低熔點物相形成元素偏析造成弱化膜的共晶團界面擴展延伸黄色高清无码在线。