查询词典 can be used

The sixteen plants are firstly divided into six types according to evaluation grades and subject function statistical method:the first type is Cajanus cajan and Crotalaria mucronata,the best adaptability ,which can be used pioneer plant or constructive species; the second type is Cynodon dactylon,the better adaptability, which can be used constructive species ;the third type is Eragrostis curvula, Paspalam notatum,which can be used constructive species on rotten rock slope ; the forth type is kummerowia striata,Lotus corniculatus and Vitex negundo.The adaptability is centered,and can be used protection species and auxiliary species;the fifth type is Robinia pseudoacacia,Eremochloa ophiuroides,Vitex negundo,Lespedeza formosa,Leucaena leucocephala,Desmodium sequax, Rhus chinne- nsis,which can't be plant singly and be used accessory species;the sixth is Trifolium repens,which can be used pioneer plant.

根据评价边坡防护植物适应性的十个重要指标，首次运用隶属函数和聚类分析方法，对各供试植物的边坡适应性综合排序并分为六类：第一类为木豆和猪屎豆，边坡适应性最强，适宜作为先锋植物和建群种；第二类为狗牙根，边坡适应性强，适宜与豆科植物混播，作为建群种；第三类为弯叶画眉草和百喜草，边坡适应性较强，适宜与豆科植物混播，作为风化岩边坡的建群种；第四类为鸡眼草、百脉根和马棘，边坡适应性中等，适宜作为保护种与伴生种；第五类为刺槐、假俭草、荆条、美丽胡枝子、银合欢、波叶山蚂蝗和盐肤木，边坡适应性较差，不宜单独在边坡上种植，最好与速生型豆科草本混播，作为边坡防护植物群落的辅助植物；第六类为白三叶，边坡适应性最差，但因其出苗率高、生长速度快，作为先锋植物，起到前期覆盖坡面的作用。

The domestic demand of acetic acid up to 1,440,000-1,620,000 tons can be anticipated in 2010, if 60% is produced by methanol, 520,000 tons of methanol will be consumed;③Methanol can be used as feedstock to directly produce various pesticides ,such as fenitrothion, omethoate, dipterex etc., we anticipate that approximately 340,000 tons of methanol will be used to produce pesticides in 2010.④ Various medicines use methanol as feedstock, such as sulfanilamide, vitamin B6 etc., we anticipate that approximately 180,000 tons of methanol will be used to produce medicines in 2010.⑤ In the duration of dye production, methanol can be used as feedstock or solvent, such as s carlet base RC, disperse red GLZ, phthalocyanin ⑥ Synthetic resin also need methanol as feedstock such as organic glass, we anticipate that about 70,000 tons of methanol will be used to produce synthetic resin and plastics in 2010;⑦Synthetic fibers and synthetic rubber industry, will use methanol about 800,000 tons in 2010;⑧ At present, the production of MTBE is increase rapidly, there are 27 set of plants, total production capacity is 620,000 tons every year, and the demand is about 800,000 tons, there is gap between demand and supply.

预计2010年我国醋酸的需求量将达144～162万吨，按甲醇羰基法占60%计，将需求甲醇达52万吨；③多种农药的生产直接以甲醇为原料，如杀螟松、乐果、敌百虫等，预计到2010年甲醇用于生产农药约为34万吨；④多种医药药品以甲醇为原料，如长效磺胺、维生素B6等，预计到2010年甲醇用于医药约为18万吨；⑤染料生产过程中用甲醇作原料或溶剂，如红色基RC、分散红GLZ、阴率子GRL、酞菁素等等，预计2010年甲醇用量约为10万吨；⑥有机玻璃等合成树脂也需用甲醇为原料，预计到2010年甲醇用于生产合成树脂与塑料用量约为7万吨；⑦合成化纤与合成橡胶工业，2010年甲醇用量约为13万吨；⑧我国MTBE生产正处于快速增长期，现有MTBE装置27套，总生产能力62万吨/年，而年需求量约80万吨，有一定缺口。

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。

Results revealed that the large side insulation of the stator bar in slot is available for ultrasonic pulse-echo testing; Coupling transducer on the surface of a practical stator bar could minimize the influence on the measurements of velocity, contributing no destructivity of the ultrasonic testing for stator insulation; The simultaneity of same velocity and higher attenuation can be used to detect insulation delamination from conductors; Compared with the wide sides of the bars in slot, the short sides of the bars near the exit from slot and the end bars had a same velocity and a higher attenuation; The velocity might be exactly measured on the shot sides of the bars near the exit from slot and the end bars, while the attenuation might not, which were examined though filed tests; V min decreased greatly and V av decreased slightly with the service time of the bars.

在实验室对线棒多种结构处的主绝缘和不同运行年数(未老化、16、18 和23年)线棒的主绝缘进行了低频超声反射法检测试验，并进行了现场试验，发现(参见 Hao et al， IEEE DEI， to be published)，槽部线棒的宽面绝缘不受换位绝缘的影响，比窄面绝缘更适合超声测量；线棒表面平滑的半导体层减小了耦合剂对超声测量的影响，实现了无损性；波速不变而声衰减减小可以检测线棒出现绝缘与导体脱壳缺陷；出槽口和端部线棒的窄面绝缘与槽部线棒的宽面绝缘相比，声衰减大而波速一致；现场试验验证了波速不受绝缘结构和现场测试条件的影响，而声衰减受以上因素影响很大(参见 Hao et al，中国电机工程学报， Vol.23 No.4)； V min 随运行年数明显减小， V av 随运行年数慢慢越小。

This result can be used to qualitatively interpret the positive correlation and anti-correlation between the near infrared excess and equivalent width of Hα emission line, as observed in some Be stars.

此结果可用来解释一些Be星中观测到的红外超和Hα等值宽度的同时增长，也可用来解释另一些Be星中观测到的红外超和Hα等值宽度的相反变化。

The solid immersion lens can be used into an optical storage system It provides the high NA of the system and uses the evanescent wave to produce extremely small optical spots Two proposals about a SIL are given out here The first one is that the protecting layer of the recording layer can be used as one part of the hemi spherical SIL So the recording layer is not polluted The second one is that a SIL can be used at same time in a double layers storage The first recording layer is used a...

固体浸没透镜用于光存储光学系统增大了光学头物镜的数值孔径，利用近场倏逝波读写，减小了光斑的直径，提高了存储密度。文中建议：(1)将半球SIL分割成两部分，其中一部分由存储媒质的保护层充当，避免直接污染记录层；(2 )在半球SIL单层读写的基础上，再将第一层记录媒质作为SIL的一部分形成超半球齐明SIL ，以实现双层存储。并对此时的近场进行了解析分折

Different page sizes and orientation can be used.You can choose your own page size and page width when splitting pdf files.Extracted images can be used with viewer.

不同的页面大小和方向，可以used.you可以选择自己的网页的大小和页宽时，分裂的PDF files.extracted图像，可用于与检视。

A big wood can be used as a girder, a thin wood can be used as a square rafter, a small wood can be used as a pendentive, a stout wood can be used as a door-hinge pit, and a wedge can be used as a door bar.

大的木材能被同样地用一个桁，瘦的木材能被同样地用一个正直的椽，小的木材能被当作 pendentive 使用，强壮的木材能被当作一个门-铰链深坑使用，而且一片楔子能被当作一扇门使用除之外。

Dye can bring a little color to life, most clothing is color with dyes, modern manufacture dyes can be costly, natural dyes from plan t and animal products have been used since ancient times, so this week, we describe by natural way to dye world, the advice comes from information written by Jenny Tim of the intermedial technology development group in Briton, this anti group is now called practical action, there are several messages to put dye onto material, the vent message for example, can be used to dye wool with onion skins, for this example, use 100 grams of natural wool, the wool must be clean, leave it overnight in water and liquid soap, then wash it with clean water that is a little warm, gently out the water, a solution called a moderant is used in the dying process, a moderant helps fix the dye to the material, traditionally moderants were found in nature, wood ash is one of example, but chemical moderants such as ironare popular today, iron is so would in many stores, it is often mixed with queen of daughter, a finding powder commonly used in cooking.

使用染料可以为生活带来更多的色彩。许多的布料都是通过染料来上色的。现代工业制造的染料通常都非常的贵，从古时起，人们就知道从植物或者动物产品中提取天然染料。这周，我们就来讨论一下如何用天然的方法来给羊毛着色。这一建议来自英国中级技术发展组的Jenny Dean的信息。这一古老贫穷的小组现在被称为实用性活动。把染料加到材料上有几种方法。其中之一是大桶法。举例来说，就是用洋葱皮来染羊毛。这一例子中，用100g的天然羊毛。羊毛必须清洗。用液体肥皂浸泡过夜。然后用温的干净的水冲洗它。轻柔地把多余的水分压挤出来。一种叫做媒染的溶剂也用于染洗过程。媒染是用来固定染料和材料的。传统的方法是，媒染是来天然的，比如木灰。但是像明矾这样的化学媒染在今天也是很流行的。明矾在许多商场都有出售。它通常和一种经常被用于烹调的粉状物-酒石混在一起。我们用多一点点的辛苦，来交换多一点点的幸福

SOA can be used in the dispersion compensation in fiber transmission system, all-optical regeneration, optical time division multiplexing, and used as preamplifier, in-line amplifier, boost amplifier in signal transmission. SOA can be also used as wavelength converter, optical switch. In signal procession, nonlinear optical loop mirror based on SOA can be used in optical pulse reshaping, and used as high rate (100Gbit/s) demultiplexer, and optical correlator for optical data retiming.

在信息传输方面，SOA用于色散补偿、全光再生和光时分复用和前置放大、线路放大、功率放大等；在信息交换方面，SOA用于波长转换、光开关等；在信号处理方面，SOA构成的非线性光环形镜用于光脉冲整形、光数据信号再定时的光相关器和高速（100Gbit/s）解复用等。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷