查询词典 convection current

The results showed that erectness of coupling pattern between upper-layer jet and low jet and a divergence area, which came forth in right of upper-layer jet provide favorable surrounding conditions. The most intensive moisture convergence, the strongest ascending movement and the most instable convection stratification all occurred in the rainfall center. The rainstorm occurred at the warm and wet side of the negative value center of the moist potential vorticity and relative MPV, which had certain indicative significance for the forecast of rainstorm areas.

结果表明：高低空急流的优势配置，耦合形势的建立以及高空急流右侧的强辐散场的存在为暴雨的发生提供了有利的环境条件；暴雨区中上升运动和水汽辐合均大于周围区域，中低层为对流不稳定层结；暴雨区位于湿位涡和湿相对位涡负值中心附近偏暖湿气流一侧，对暴雨落区预报有一定的指示意义。

Pipeline stress calculation and Euler formula, as well as the theory of forced convection heat transfer in tube, are used to solve the problem of large deformation and uneven distribution of stress which occurred in thermal pipeline of a power plant.

通过应用管道应力计算方法、欧拉公式以及管内强制对流换热等传热学理论，解决了某电厂热力管道运行中出现的变形过大、应力分布不均的问题。

In the analysis, firstly, the flux boundary condition is used to simulate the frictional heat resource between wheel and rail. The non-steady heat transfer between the contacting surfaces of the wheel/rail, heat-convection and radiation between the wheel/rail and the ambient were all taken into consideration. Therefore, a heat coupling model of the wheel/rail in rolling/sliding is put forward to calculate the frictional temperature rise in the wheel and rail. Secondly, after the temperature distribution of wheel/rail, due to friction, is calculated, substitute the thermal load with equivalent fictitious body force and boundary distributed force loaded on the nodes of the corresponding elements. The wheel-load is applied to the center of the wheel.

首先，用热流边界条件模拟轮轨接触界面的摩擦热源，考虑轮轨间的非稳态热传导、轮轨自由表面与环境的热对流、热辐射的影响，建立轮轨滚动接触热耦合有限元计算模型，分析计算轮轨滚、滑工况下的摩擦温升；其次，以求得的轮轨温度场结果作为求解轮轨应力场的已知条件，轮载以集中力形式直接加载于轮心处，将摩擦温升引起的热载荷等效为假想体力和热边界面力，施加于相应的单元节点上，建立了轮轨热—机械载荷耦合作用的热弹性平面应力模型，分析热—机械载荷作用下的轮轨应力场。

By analyzing several typical problems concerned with convection heat transfer and comparing the numerical results with the corresponding literatures, the second order full extension ETG finite element method is proved to be of better accuracy and stability.

通过几个典型的对流换热问题的算例分析，并与相关文献比较，证明了二阶全展开ETG有限元法在流场和温度场的计算中都具有较好的稳定性和较高的精度，适于求解对流换热问题。

Thus LES is proved to be suitable to simulate the flow and temperature fields of large scale vortices with complex geometric boundaries. LES cooperated with the second order full extension ETG finite element method is applied to simulate the forced convection heat transfer around two square cylinders arranged side by side. While the boundary conditions are symmetrical, the time history and power spectrums of drag coefficient, lift coefficient, averaged Nusselt number at the wall, and the streamwise velocity and temperature on the symmetrical points are calculated. The results show that the power spectrums are all almost symmetrical.

应用大涡模拟与二阶全展开ETG有限元离散格式相结合的方法对间距比为1.5的条件下横掠并列双方柱强制对流换热问题进行了数值模拟，通过边界条件对称时，对并列双方柱对称点上的速度和温度以及方柱的阻力系数、升力系数和壁面平均Nu数进行的时域分析和频域分析，得到了在对称边界条件下并列双方柱对称点上的速度和温度以及方柱的阻力系数、升力系数和壁面平均Nu数的功率谱均基本对称的结论。

A fuzzy neural network method is used to monitor and to diagnose fouling on convection heating surfaces.

将模糊神经网络方法应用于对流受热面的灰污诊断和监测，给出了一种模糊神经网络的网络结构、推理算法和训练算法。

Thus the data of the earth spheroidal and toroidal free oscillation can be used to explore the 3-dimensional structure(density structure ,velocity structure) or anisotropy of the earth and help to disclose the convection mode in the whole mantle or in the upper mantle.

因此地球自由振荡信息可用于揭示地球的三维不均匀结构信息或各向异性信息，并可能对区分地幔对流模式有所帮助。

Theoretical and experimental studies on temperature drop process of freight car bearing under natural convection are done.

为此提出以还原轴承温度的方法描述拦停报警时轴承的实际温度。

The numerical model based on energy conservation equation, takes into account of Gauss distribution, in space and time of laser spot, the finite size of sample, the temperature dependence of physical thermal properties, and the surface heat losses due to convection and radiation.

计算模型在能量平衡方程的基础上，将入射的脉冲激光在时间与空间上的分布以Gauss分布考虑，同时考虑工件尺寸、工件材料热物理性质及对流辐射造成的表面热损失等对温度场的影响。

Mian colors achieving high speed single way rainbow and scrolling effect 0-100% mechanical linear dimming (tunable from full blanking to full opening effect) Mechanical linear DIMMER and 1-10 times/s high speed STROBE effect Horizontal 450°and vertical 250°scanning range, smooth scanning action and accurate orientation Precise adjustment on horizontal and vertical position Precise speed adjustment on horizontal and vertical position Pattern internal light rotating function,freely adjusting fast , low speed , clockwise and anticlockwise GOBO position adustment Automatic focusing function 3 Prism effect, prism colorwise and anticolorwise rotating Built-in over heat protection and high voltage protection 2 convection cooling-fan,optimize internal air duct way, heat elimination rapidely Compatible with DMX512 international digital singal PFC power factor compensation According to various kinds of safety standards, IP20 protect grades, The cable accords to the CE20/22 standard

PERFORMANCE TRAIT 8种主色彩，同时可作高速单向滚动效果 0-100%机械线性调光（可控制全遮光到全开光效果） 1-10次/秒超高速频闪调整效果水平540度，垂直250度扫描范围，动作平滑、流畅、定位准确水平、垂直运动位置可精确调整位置水平、垂直运动位置速度可调功能旋转图案可正反、快慢自由调节旋转图案角度可单独调整采用电子自动对焦，图案远近均清晰度可自由调整三棱镜及棱镜正、反自由旋转功能二只对流风扇致冷，内部优化风路设计，散热充分良好内置过热保护、触发高压保护接受DMX512国际标准数码信号 PFC功率因素补偿符合各种安全标准，IP20保护等级，电源线符合CE20/22标准

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48