media media1 n. (pl.-diae 1.〔拉丁语〕【语言学】带声破裂子音;(带声)不送气破裂音([b][d][])。 2.【解剖学】血管的中膜;【虫类】中脉。 3.〔M-〕伊朗西北部的古王国。 media2 n. 1. medium 的复数。 2.〔用作 sing.〕媒体,传播媒介〔指报刊、广播、电视等〕。
continuous adj. 1.连续的,继续的,无间断的。 2.【植物;植物学】无节的。 a continuous current 恒(向电)流。 continuous fire 连续射击。 continuous rain 连绵不断的雨。 a continuous train of thoughts 一连串的思想。 a continuous wave (radar) 等幅波(雷达)。 adv. -ly
Using the numerical computation method to simulate the pure air flowing in the plasma generator and using zero dimension theory and continuous medium hypothesis to establish the mathematical model of the plasma generator and applying the curvilinear coordinate to disperse the space of the plasma generator, applying simplec method to solve the set of discredited equations 应用数值计算的方法模拟了等离子发生器内部的纯空气流动,应用零维理论分析模型和连续介质假设建立了描述等离子发生器内部流动和传热的数学模型;采用贴体坐标系对等离子发生器的流场空间进行空间离散;采用simplec算法来求解离散方程,获得流场的数值解。
Although various mechanics models have put forward many numerical techniques, the widely used one that is commonly admitted by engineers is the finite element method . combined the joint elements, on some extent this method could overcome structural surface obstacles described by the mechanics of continuous media such as the joint of canny existing in the inner of rocks . until now, the finite element method has been widely employed because of the mature of the large-scale construction computing software 针对各种力学模型提出了多种数值方法,最广泛使用的并获得了工程界普遍承认的是有限元法,有限元法结合节理单元可以一定程度上克服连续介质力学在描述岩体内部存在节理裂隙等结构面的障碍,目前有限元法由于大规模结构计算软件的成熟而为工程界所普遍运用。
4 . with the consideration of practical soil-pile interaction, the soil around pile is modeled as a three-dimensional viscous-elastic continuous medium and the time effect of the settlement of single pile is studied . the semi-analytical solutions for vertical displacement of soil and for the relationship between settlement of pile head and time were obtained by laplace transform method and fourier inverse method, and the law of the settlement of pile head varying with time was then analyzed and discussed 考虑桩土藕合作用的单桩沉降时间效应研究从研究空间轴对称问题的角度出发,将桩周土体建模为三维粘弹性连续介质,更为合理地考虑了静荷载下桩土系统中单桩与桩周土的藕合作用,分别建立了桩周土体和桩体的静力平衡方程,并通过拉普拉斯变换、傅立叶逆变换等数学手段,获得了单桩桩周土体的垂直变形和桩顶沉降在拉普拉斯变换域内的解析解和在时间域内的半解析解,进而分析讨论了单桩沉降随时间变化的规律。
And the rock mass as the main object of most engineering practice is developed by all kinds of geotechnical action and force in the long geology history to the complex characteristic of continuous medium, crannied medium and granular medium, to the anisotropic and heterogeneous entity with elasticity, plasticity, viscidity, creepocity and rheology 作为主要工程对象的岩体是在漫长的地质历史发展过程中经受各种地质营力作用而形成的成因和构造复杂,岩性多样且包含了连续介质,裂隙介质和散体介质特征的,兼有弹性、塑性、粘性、流变性的各向异性的非均质地质体。
While wells are producing, heat transfer in welibore is considered as heat conduction and convection in continuous media in vertical tube, heat transfer in production zones is considered as heat conduction and convection in porous media, heat transfer in adjacent rocks is considered as heat conduction in porous media . while wells stop producing, because of stopping flowing in welibore and production zones, heat transfer in welibore is considered as heat conduction in continuous media in vertical tube, and heat transfer in formation is considered as heat conduction in porous media 当油井生产时,将井筒内传热看成竖直圆管中连续介质的传导和对流换热,将地层中产层部分的传热看成多孔介质中的传导和对流换热,将地层中围岩部分的传热看成多孔介质中的热传导;当油井停产时,由于井筒和产层都没有了流体的流动,所以将井筒内的传热看成竖直圆管中连续介质的传导,将地层中的传热看成多孔介质中的传导。
While wells are producing, heat transfer in welibore is considered as heat conduction and convection in continuous media in vertical tube, heat transfer in production zones is considered as heat conduction and convection in porous media, heat transfer in adjacent rocks is considered as heat conduction in porous media . while wells stop producing, because of stopping flowing in welibore and production zones, heat transfer in welibore is considered as heat conduction in continuous media in vertical tube, and heat transfer in formation is considered as heat conduction in porous media 当油井生产时,将井筒内传热看成竖直圆管中连续介质的传导和对流换热,将地层中产层部分的传热看成多孔介质中的传导和对流换热,将地层中围岩部分的传热看成多孔介质中的热传导;当油井停产时,由于井筒和产层都没有了流体的流动,所以将井筒内的传热看成竖直圆管中连续介质的传导,将地层中的传热看成多孔介质中的传导。
Firstly, in this dissertation, two types of symbol start time estimation schemes for orthogonal frequency division multiplexing ( ofdm ) systems are evaluated and analyzed . simulation results suggest that : pilot symbol based synchronization has better performance over cyclic prefix based schemes, and it performances improved when the length of pilot symbol increases; cyclic prefix based synchronization method has a high spectrum efficiency in spite of its relative low acquisition of synchronization rate; and the former is more suitable to bursting symbol based information systems, such as ieee802.11a, while the later can be used in broadcasting systems for continuous media streams, such as digital video broadcasting systems, digital audio broadcasting systems 首先,论文从同步获取的角度对ofdm系统中的两类时域符号同步方案进行了性能分析,并通过大量的仿真说明:基于训练序列的同步方法具有较好的同步获取成功率,其性能随训练序列的长度增加而改善;基于循环前缀的同步方法,其同步获取成功率较低,但是具有较高的频谱利用率;前者适用于突发数据帧传输系统,如ieee802.11a等,后者适合广播式连续媒体流传输系统,如数字音频、数字视频系统。
Recently, discrete particle model in which particles are directly tracked was paid widely attention due to the great development of computer hardware . in this model, gas phase is treated as continuous medium, and particle phase is treated as the discrete system . because particle movement is investigated in the particle-level, the multi-scales structure of fluidized bed can be simulated in both particle-scale and macro-scale 近年来,由于计算机硬件的飞速发展,直接对颗粒进行跟踪的离散颗粒模型得到了广泛的关注,此类模型将流体相处理为连续介质,颗粒相处理为独立的离散体系,由于它对颗粒相运动进行的是颗粒层次的分析,因而可以从颗粒尺度与宏观尺度模拟流化床气固两相流的多尺度结构。