- 更多网络例句与使下降的相关的网络例句 [注:此内容来源于网络,仅供参考]
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The effect of tribology factors on bearing vibration is studied experimentally. AR model and WPT are used to processing the normal arid abnormal signals. The results are as follows:1. The vibration of ball bearings is caused by the tribology action of contact pairs of ball and ring races and has the essential of tribo-dynamics. Any factors affecting the tribology characteristics of contact pairs will affect vibration and noise of bearings consequently.2. Vibration characteristics of bearing keep almostly unchanged with the increasing of axial load expecting the increasing of nature frequencies. When radial load increasing with axial load unchanged, nature frequencies keep unchanged but some new vibration peaks appears in the spectrum.3. Vibration amplitudes are damped and nature frequency are enhanced with sufficient lubrication. Vibration and noise of bearings increase obviously and roar can happen and the contact surfaces scratch slightly under insufficient and unclean lubrication state. Bearing will be disabled in a few minutes without any lubrication.4. Bearing vibration is unstable under low speed. With the speed increasing, the vibration become stable and natural frequencies increase slightly but the amplitudes increase apparently.5. Bearing vibration can be excited only by some harmonics ofwaviness without lubrication and by all harmonics with lubrication based on the theoretical analysis.6. The nature frequencies of ball bearings decrease with the increasing sizes. When international clearance increasing, nature frequencies decrease in radial and increase in axial and angular and the amplitudes increase in radial and decrease in axial and angular. When the number of balls increasing, nature frequencies increase and amplitudes decrease. When the pitch diameter increasing, axial nature frequency increase and others nearly keep no change. When outer race groove curvature radius increasing, nature frequencies increase in radial and decrease in axial and angular and amplitudes keep no change in radial and increase in axial and angular. When inner race groove curvature radius increasing, nature frequencies decrease and amplitudes increase.7. The distortion in amplitude and frequency components of bearing vibration signals picked up by the present probe measurement method is founded and right conclusions cannot be achieved by the signals. When accelerometer is rigidly screwed with steel stud onto a flat outer surface of a ball bearing, vibration signal can be got without distortion and the reliability of research on bearing vibration is assured.8. AR model is suitable for large samples of bearing vibration signals, square root of length of samples can be used as the upper limitation of order determination and the FPE order selection criterion is effective. Many advantages of AR spectrum are founded over the classical based on FFT.9. Time-Frequency analysis is necessary for abnormal noise of ball bearings. WPT overcomes the principle shortcomings of STFT and proved to be a best tool to process the abnormal signals.
理论分析和试验研究表明: 1球轴承振动是钢球—滚道接触副中的各种摩擦学作用引起的,具有摩擦动力学的本质,任何对接触副的摩擦学特性有影响的因素都将对球轴承的振动和噪声特性产生影响; 2中心轴向载荷作用下,载荷增大使球轴承的固有振动频率升高,载荷越大同样的载荷增幅引起的频率升幅减小,足够大的中心轴向载荷作用下载荷的变化对球轴承振动的频率特性不会产生明显的影响; 3轴向和径向联合载荷作用下,径向载荷不大时球轴承振动的固有频率基本不变,但是可能引起变刚度激励的非线性振动,出现新的频峰,过大的径向载荷将使部分钢球脱离接触,使球轴承的振动和噪声呈现不稳定状态; 4润滑对球轴承的振动和噪声特性有重要的影响,良好的润滑对振动有明显的抑制作用,润滑不充分时,振动和噪声的水平会有明显增高,一定条件下还会激发接触副中的谐振,发出啸声,造成接触表面的伤害,无润滑干接触时,短时的运转就会损伤接触副表面,使振动和噪声迅速增大,并随时可能引发严重的磨损和卡滞失效;接触副润滑良好时,油膜的"刚化效应"使球轴承振动的固有频率有所提高,润滑剂中含有弥散性污浊时,振动的幅度总体升高,但弥散性污浊不会改变球轴承振动的频率特性;浙江大学博士学位论文:球轴承振动的研究 5低速时,球轴承振动的基本特征呈现不稳定状态,随着转速的提高,球轴承振动的频率特性趋于稳定,固有频率频峰升高; 6理论分析表明,干接触时钢球和滚道表面波纹度的某些谐波分量能激励球轴承的振动,振动的幅值与谐波幅值成正比,实际球轴承中钢球的分布不可能完全均匀,波纹度的激励作用会随时发生;润滑接触的分析表明,波纹度的任意谐波分量均能激励球轴承的振动; 7球轴承的几何和结构参数分析表明,球轴承尺寸越大,径向、轴向和角振动的固有频率越低;钢球中心圆直径增大,球轴承的径向和轴向振动的固有频率基本不变,角振动的固有频率有所上升,振动的幅频特性基本不变;径向游隙加大使球轴承的径向振动固有频率降低,轴向和角振动的固有频率有所升高,径向振动幅频特性的幅值升高,而轴向和角向降低;钢球的数量增多使球轴承振动的固有频率上升,幅频特性的幅值下降,径向振动的幅值下降最为明显;外圈沟曲率半径系数增大使球轴承径向振动的固有频率升高,轴向和角振动的固有频率降低,径向幅频特性基本不变,轴向和角向幅频特性幅值升高;内圈沟曲率半径系数增大使径向、轴向和角振动固有频率均下降,振动幅频特性的幅值均有升高; 8试验对比表明,传感器采用探针式安装时,由于探针接触副接触特性的影响,钡(量得到的球轴承振动信号有失真,采用专门设计和制作的试验球轴承,以固定式安装加速度计,首次测量得到了球轴承振动的真实信号,通过对振动信号的分析,验证了球轴承振动的理论模型; 9)基于时间序列分析的AR模型适用于大样本球轴承振动信号的分析,以样本长度的均方根值作定阶上界,FPE做判阶准则,给出的AR谱光滑,频率分辨率高,是球轴承振动分析的简便而可靠的手段; 10以时频域分析的小波包变换分析球轴承异音信号能够比较好地定位和聚焦异音发生的时间,时间间隔,频率范围,同样是球轴承振动分析的可靠的手段,可用作球轴承故障诊断技术。
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In the redispersable powders, WACER powder is excellent. When fine percentage of redispersable emulsoid powder is 1, toughness, adhesive performance of mortar have improved.(3) When MC was mixed into mortar, water-retentive performance, toughness, adhesive performance of mortar have improved and 28d dry shrinkage of mortar has reduced.(4) When AEA was mixed into mortar, dry shrinkage of mortar reduced and infiltration resistance has improved.(5) When cement-to-sand ratio is 1:2.5 , toughness of mortar is perfect.
2WACKER的VAE和551Z两种乳胶粉的效果较好,最佳质量掺量均为1%,对砂浆的和易性、韧性、粘结性能均有较大改善;(3)在干拌砂浆中加入MC保水剂后,砂浆的保水性提高,韧性得到改善,粘结性能也得到了增强,砂浆的28d干缩值也有所下降;(4)砂浆中加入AEA膨胀剂后,砂浆的干缩下降,抗渗性也有一定提高;(5)灰砂比为1:2.5是较为理想的,砂浆的和易性较好,韧性较好;(6)砂浆中加入掺合料可以使砂浆的韧性得到提高,但是会使砂浆的粘结性能下降。
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Water retention value of the bleached wheat pulp decreased The fiber of refined pulp have a more amorphous area, refined pulp contains more fines, more hydrogenous fibrils, colloidal cellulosic material can be produced on the surface of fibers.
纤维素酶酶解的是一些比表面积较大,亲水性较强的胶体性纤维,这些物质的去除也使纸浆的保水值下降。同时,酶攻击了纤维的薄弱处,使纸浆的聚合度稍有下降。
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Time to lay claim to the evidence fingerprints sell me out but our footprints washed away from the docks downtown it's been getting late for days and i feel myself deserving of a little time off we can kick it here for hours and just mouth off about the world and how we know it's going straight to hell pass me another bottle, honey the jaeger's so sweet but if it keeps you around, then i'm down meet me on thames street i'll take you out though i'm hardly worth your time in the cold, you look so fierce but i'm warming up because the tension's like a fire we'll hit south broadway in a matter of minutes and like a bad movie, i'll drop a line fall in the grave i've been digging myself but there's room for two six feet under the stars i should have known better than to call you out (on a night like this, a night like this) if not for you, i know i'd tear this place to the ground (but i'm all right like this, all right like this) i'm gonna roll the dice before you sober up and get gone i'm always in over my head thames street i'll take you out though i'm hardly worth your time in the cold, you look so fierce but i'm warming up because the tension's like a fire we'll hit south broadway in a matter of minutes and like a bad movie, i'll drop a line fall in the grave i've been digging myself but there's room for two six feet under the stars time to lay claim to the evidence fingerprints sell me out but our footprints washed away i'm guilty, but i'm safe for one more day overdressed and underage do you really need see an id?
时间觊觎的证据指纹出卖我但我们的足迹冲走从市区码头它已经很晚了天我觉得自己一个小假值得我们可以在这里踢了几个小时和公正的嘴把对世界的以及我们如何知道这将直接进入地狱通过我的另一瓶,蜂蜜在耶格的如此甜蜜但如果它使你周围,那我下我会晤泰晤士街我会带你出去虽然我不值得你的时间在寒冷的,你看看如此激烈但我升温因为像火紧张的我们会击中在几分钟内南百老汇像一个糟糕的电影,我将下降1线下降的严重我一直在挖掘自己但是有两个房间六英尺下的星星我应该知道比给你打电话了(在这样的夜晚,这样的夜晚)如果不是你,我知道我会撕这个地方到地面(但我这样的权利,都喜欢这样的权利)我要去滚骰子在你清醒过来,得到了我总是在我头上泰晤士街我会带你出去虽然我不值得你的时间在寒冷的,你看看如此激烈但我升温因为像火紧张的我们会击中在几分钟内南百老汇像一个糟糕的电影,我将下降1线下降的严重我一直在挖掘自己但是有两个房间六英尺下的星星时间觊觎的证据指纹出卖我但我们的足迹冲走我有罪,但我一个更安全的一天打扮和未成年你真的需要看到一个ID?
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AT-deficient plasma had significantly smaller R values compared with control, and dilution did not change R values in AT-deficient plasma. Celite activation eliminated dilution-associated changes in R values in control plasma but resulted in linear decreases R(2 = 0.88-0.96, P 0.0001 in alpha, A, and G in response to dilution.
结果显示对照组稀释后R、A、G值均明显下降,a值没有改变,而AT缺乏组与相应对照组相比R值明显降低,但稀释对其R并没有影响,硅藻土激活后使对照组中稀释造成R值下降的效果被消除,但使a、A、G值随稀释程度呈线性下降。
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Most of the Italian monasteries had fallen under the influence of Cluny in the tenth and eleventh centuries, and had adopted its customs, but by the end of the fourteenth century they had so greatly declined that there was then hardly one left in which the Cluniac observance was retained.
大多数意大利寺庙下降的影响下,克鲁尼在第十和第十一世纪,并通过了海关,但在年底的14世纪,使他们大大下降,有那麼一个很难留在该Cluniac遵守被保留。
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The reason may be that complex formed by rhodium and halide was difficult to produce the catalytic active species. Therefore halide ion was the poison for the rhodium catalyst in hydroformylation of olefins in ionic liquid. The effect of double long chain cationic surfactant (DCMAB, dicetyl dimethylammonium bromide) on selective hydrogenation of cinnmaldehyde catalyzed with RuCl3·x H2O/TPPTS was studied.
进一步的研究表明在使用有良好反应活性的两种催化剂HRh3 、Rh_2进行催化反应时,向体系中加入含有卤离子的化合物时将使反应活性大大降低,而且随着卤化物加入量的增加,催化剂的活性迅速下降,这是卤离子可能和金属铑作用使它难于生成催化活性物种,进一步证明卤素离子是引起催化剂活性下降的极其重要的因素。
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Deep grand of far water shade drop in temperature principle: Water shade and fan install the two sides wall in workshop respectively, when fan convulsions, make the air of workshop forms negative pressure, the not saturated air outside forcing workshop sheds the surface with classics water poriferous and wet shade, cause moisture to evaporate absorb a large number of latent heat, drop the temperature of air oneself thereby, below the action of fan, the humid air of these temperature that be redu
深弘远水帘的降冷元理:水帘微风机分别装在车间的双面墙头,风机抽风时,使车间的空气air产生负压,强使车间外未饱满的空气air流经水帘多孔湿滑的外面,引发水份辉发吸收非常多潜热,进而下降空气air本身的温度,在风机的作用以及影晌下,这一些被下降温度的湿滑空气air就涛涛不停的步入车间。
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The main fatty acid from longissimus, kidney and tailhead fat obtained from each carcass were measured by gas chromatography technology.
日粮中分别添加相当于40.0g粗脂肪的油菜籽、油葵籽、红花籽和亚麻籽,饲喂成年母羊35d后屠宰,用气相色谱技术测定了羊体背最长肌、肾脏脂肪和尾部脂肪的主要脂肪酸组成,结果表明:日粮对肌肉中FA组成的影响较对脂肪组织的大;在所测定的3个部位中,C14:0最为稳定,不受日粮影响;在脂肪组织中,C16:1、C18:1也不受日粮的影响,但肌肉中C18:1含量因添加红花籽显著增大;添加亚麻籽有提高脂肪组织中C18:3的趋势,其余油籽有使各部位C18:3含量下降的趋势,以油葵组下降最为明显;除油菜籽(富含C18:1)外,富含多不饱和脂肪酸的油籽有使C16:0降低的作用。
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Cited Pistons pull vent valve 10-valve piston cited the role of pulling out are seized cylinder piston rod, when its mild in China emerged after the main hydraulic cylinder rod cavity and there is no cavity under the pressure dropped, so that the main hydraulic cylinder in motion the process of increasing resistance to the main pump to increase the load, resulting in engine speed when pumping declining situation.
3活塞引拔阀内泄活塞引拔阀10的作用是拉出检缸活塞杆,当其出现轻度内泄后,主液压缸无杆腔和有杆腔的压差下降,使主液压缸动作过程中阻力增加,使主泵负荷加大,导致泵送时出现发动机转速下降的现象。
- 更多网络解释与使下降的相关的网络解释 [注:此内容来源于网络,仅供参考]
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carpool:拼车
而拼车(Carpool)的人持续下降. >(Commutingin America)一书的作者、通勤问题专家阿兰.皮萨斯基分析通勤者拼车人数下降的原因时说:「过去20年拼车人数一直呈下降趋势,其原因是汽车价格下降,使低收入者买得起车.
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cryptorchidism:隐睾症
下降的过程,有时受阻,结果可能使一个或两个睾丸仍留在腹腔中、腹腔壁、或鼠蹊部,即所谓"隐睾症"(cryptorchidism). 睾丸没有下降的男人会造成不孕,只能空搞女人,不能生子. 上海人以"侬是一只卵"骂人,恐怕与"隐睾症"有关.
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gasholder:储气罐
空气通过申江牌储气罐(gasholder)时高速的气流撞击到申江牌储气罐(gasholder)壁使其产生汇流,在申江牌储气罐(gasholder)内使温度快速下降,使大量的水蒸气得到液化,从而去除大量的水份及油份.
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gravitate:被重力吸引/沉下/下降/使受重力吸引
gravistatic /坠积的/ | gravitate /被重力吸引/沉下/下降/使受重力吸引/ | gravitating /重力吸引/
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lightening:胎儿下降感
2.胎儿下降感(lightening)多数初孕妇感到上腹部较前舒适,进食量增多,呼吸较轻快,系胎先露部下降进人骨盆人口使宫底下降的缘故. 因压迫膀胧常有尿频症状. 3.见红(show)在分娩发动前24 -} 48小时内,因宫颈内口附近的胎膜与该处的子宫壁分离,
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Coaching Outfield Players:训练受伤球员能力?可以使球员在受伤的时候不至于能力大幅度下降
Coaching Goalkeepers:训练守门员能力; | Coaching Outfield Players:训练受伤球员能力?可以使球员在受伤的时候不至于能力大幅度下降; | Determination:决心,为俱乐部赢得比赛的决心;
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Coaching Outfield Players:训练受伤球员能力,使球员在受伤的时候不至于能力大幅度下降
Coaching Goalkeepers-训练守门员的能力 | Coaching Outfield Players-训练受伤球员能力,使球员在受伤的时候不至于能力大幅度下降 | Determination- 为俱乐部赢得比赛的决心
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streamlined:流线型的
它们又表现出一种新的形状,尽管这种形状比球状更不简单,却仍然是完全对称的,并满足以下的条件,即水滴的形状使它穿越空气时受到的阻力最小,这样一来,它便可以下落得尽可能地快;换言之,下降的水滴完全是流线型的(streamlined);它的对称性再次与
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send down:使下降, 开除
I sent away for some rare books. 我函购了几本罕见的书. | send down 使下降, 开除 | As he was bad behaviour, he was sent down by the university. 由于他恶劣的行为被校方开除了.
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avale:使下降 放低 沉下, 流下
avalanchologist || 研究雪崩的专家 | avale || 使下降 放低 沉下, 流下 | avalement || 下坡转弯加速