查询词典 large order

The result shows that the mixed boundary condition can greatly reduce the calculation area without affecting accuracy of the solution.It is followed by the higher accuracy of Dirichlet boundary condition which makes the boundary error greater when measured points is near the boundary, so we must take a sufficiently large border region.The homogeneous boundary condition has relatively large error, but the use of non-triangle poles devices makes apparent resistivity calculation error become small, because of elimination of the effect on potential difference for the infinite boundary. In inversion, in order to save computing time, homogeneous boundary conditions are often used to perform finite element forward calculation.

结果表明，混合边界条件精度最高，可大大缩小求解区域而不影响计算精度，其次是Dirichlet边界条件精度较高，但测点越靠边界误差会越大，必须取足够大的边界区域，齐次边界条件的误差比较大，但如果采用非二极装置，通过电位差计算得到的视电阻率，由于无穷远边界对电位差的影响基本消除，视电阻率计算误差与混合边界条件下的接近，在反演中，为了节省计算时间，经常使用齐次边界条件进行有限元正演。

Finite Element Method is an important means of engineering subject and has been proved to be a common method in many subjects. However, disadvantages still remained. During the structural analysis, large amount of high-order units were used in order to ensure the precision of arithmetic solution when using Finite Element Method to do discrete processing. This will cause high order of coefficient matrix of corresponding equation group.

有限元方法是工程学科的重要工具，被证明为在许多科学和工程领域中连续物理系统模拟的一种普遍方法，但缺点是随着工程结构分析问题越来越复杂，在结构分析中，为保证数值解的精度，在使用有限元方法离散处理时，往往要用大量的高阶单元将结构剖分得很密，这时相应的代数方程组的系数矩阵的阶数很高，即使用目前速度最快的串行机来进行求解，费时仍然太多且问题的规模受到内存容量的限制。

In order to adapt to production requirement of large scale and high efficiency, we have designed the cupola with two lines and large distance.

曾晶为了适应大规模、高效率的生产要求，对普通冲天炉进行改进，设计出双排、大间距冲天炉。

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。

The construction of the international shipping center, besides offering advanced hardware facilities, the soft environment of the high-quality, high-efficient, security is the condition that an international shipping center must possess too, and the good water traffic safety order is an extremely important condition of soft environment in an international shipping center construction, in order to adapt to the construction of the international shipping center of Shanghai, port unit like customs , frontier unit put into a large amount of manpower and materials and the soft environmental constructions related to international shipping center in succession, meanwhile, to ensure the work to put forward the new request of Shanghai Maritime Affairs Bureau who is responsible for Shanghai harbor water traffic safety supervision management and boat policy management, in order to adapt to the construction of fast-developing international shipping center of Shanghai, it is immanency to research and construct and implement of boat policy to develop the high-capacity and high-technology patrol ships.

国际航运中心的建设除了提供先进的硬件设施以外，优质、高效、安全的软环境也是国际航运中心必须具备的条件，而良好的水上交通安全秩序是国际航运中心建设软环境中一个极其重要的条件，为适应上海国际航运中心的建设，口岸单位象海关、边防等单位相继投入大量的人力物力建设与国际航运中心相配套的软环境设施，与此同时，对作为上海港水上交通安全监督管理主管机关的上海海事局的航政管理、航海保障工作提出了新的要求，为适应快速发展的上海国际航运中心的建设，研究开发和建设实施航政管理、航海保障任务主要手段的高性能和高技术含量的巡逻船舶在当前显得十分迫切。

When we received a large amount of order of the same item, we will 'order and ship' by 'first-come, first-serve' basis. When all available orders are shipped for same item, it may take up to additional 20-30 days before we receive next shipments. Sometimes our suppliers can also be out-of-stock (this rarely happens, but it can!) in further hindering the ship time of products. If you cannot and not willing to accept this type of sales, please do not order and not to cause any further confusions!!

如果我们的货单很多，我们将会依照汇款或下标顺序出货，所以只有最早汇款的几位贵客可以马上收到货，现货寄完其余的贵客就必须等追加约20-30天，才能到货，甚至也有可能出现厂商临时出状况而追加失败的情形(这种情况比较少，但还是有可能发生)，所以请可以接受以上状况和愿意等的贵客再下标，无法接受请千万不要下标，以免造成交易上的误会与不愉快喔！！

Children suffering from macroglossia may require surgical reduction of the tongue in order to prevent the social stigma of retardation associated with a large protruding tongue, and to minimize the negative affect of the large tongue on tooth and jaw development - which may cause malformation of the jaw due to constant pressure of the large tongue as well as splayed teeth.

患有巨舌症的患儿可能需要进行舌部减小手术来防止与大而突出的舌头有关的人际交往问题，以及减小大的舌头对牙齿和下颚发育带来的负面影响有可能由于舌头的持续的压力导致下颚畸形以及牙齿稀疏。

Ever took the lead in putting forward " enterprise cold winter " Alibaba, its CEO Wei Zhe expressed when accepting reporter special report a few days ago,"The hour with the the most dangerous, murkiest economic situation has gone "; But, he thinks financial seismic sea wave changed economic pattern already deeply, order also is by the large-scale change that order break 0 sheet are given priority to, accordingly the mode of Chinese electron business affairs must be changed in order to get used to a situation.

曾率先提出&企业寒冬&的阿里巴巴，其CEO卫哲日前在接受记者专访时表示，&经济形势最危险、最黑暗的时刻已经过去&；但是，他认为金融海啸已经深刻改变了经济的形态，订单也由大规模订购转变为拆散零单为主，因此中国电子商务的模式必须改变以适应形势。

Through the large 〓 analysis of equation of motion for 〓 and thecalculations of contribution of 〓 to mass splittings, we find: 1.the time-component 〓 of 〓 takes the order of 〓 while its space-component 〓 possesses the order O,the same order as the one of ω.

通过对〓运动方程的大〓分析及〓对转动惯量贡献的计算，我们发现：1。

During the Gulf War, in order to secure its oil interests in Middle East, United States carried out"quasi-unilateral"activity. In the Kosovo War, in order to pursue its strategic interests in Balkan, United States led NATO to launch large-scale air strikes against a sovereign country without authorization from UN Security Council. In the Iraq War, in order to overthrow Saddam Hussein regime, United States put preemptive strategy into practice, which expanded its motive to resort to force and unilateralism to extreme.

以此发现，在海湾战争中，美国为了捍卫中东的石油利益实施了&准单边主义&行动；在科索沃战争中，美国为了在巴尔干的战略利益不惜违反联合国决议、主导北约对一个主权国家发动大规模的空袭行动；在伊拉克战争中，美国为了推翻萨达姆政权把&先发制人&战略付诸实施，将武力运用和&单边主义&发挥到了极致。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。