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Search Results: 1 - 10 of 286001 matches for " br>廖成 "
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OBJECT-FITTED FDTD METHOD BASED ON MEI-ABC
基于MEI方法的贴体网格FDTD方法

LIAO Cheng,<br>
红外与毫米波学报 , 2001,
Abstract: The finite difference time domain (FDTD) computational zone was truncated by an artificial boundary, of which the geometric shape was conformal with the boundary of an arbitrary shaped scatterer. The external conformal mesh was generated by the Thompson transformation.On the truncating boundary, the time domain measured equations of invariance (MEI) were applied as a local absorbing boundary condition. So the FDTD computational domain was compressed remarkably. The numerical experiment proved that the requirement of computer storage is reduced while the numerical accuracy is not decreased.
The emergy analysis of the eco\|economy system in typical farming and grazing households in Mu Us sandland
毛乌素沙地县域典型农、牧户单元生态经济系统能值分析

HuBingHui,Liao YunCheng,<br>胡兵辉,
生态学报 , 2009,
Abstract: As the most basic production unit, eco\|economy systems of farming and grazing households are of significance to the implementation and outcome of national policies. In this paper, eco\|economy systems of farming and grazing households, in Mu Us sandland acrossing Inner Mongolia Autonomous Region and Shaanxi Province,were studied by emergy theory and emergy analysis methods. The emergy input and output structure of different industrial models in Wushen banner, where grazing is dominant, and Yuyang district, where farming is the case, have been compared and analyzed. The total characteristics of pattern and development of typical eco\|economy systems of farming and grazing households are described and compared quantitatively by net emergy output ratio, emergy investment ratio, environmental loading ability, emergy power density, productivity of unit acreage, emergy cost per capita, emergy possession per capita, system production priority, system stability index and sustainability index. We hope our study could help to provide strategies for development and optimization of farming and grazing household industrial models in farming\|dominant zones and grazing\|dominant zones of Mu Us sandland.
The coupling relationship and emergy analysis of farming and grazing ecosystems in Mu Us sandland
毛乌素沙地农牧生态系统能值分析与耦合关系

HU Binghui,LIAO Yuncheng,<br>胡兵辉,
生态学报 , 2011,
Abstract: Aiming at real productivity of frail farming and grazing ecosystems in Mu Us sandland, basing on coupling theory of complex ecosystem, Uxin banner where grazing is dominant and Yuyang district where farming is the main character were selected as research object by means of using emergy theory and analytic methods, it analyses the primary productivity, secondary productivity and the coupling status of the farming and grazing system in those two areas for 27 years. And it comes up with a possible evolvement regulation of the extent of agro-ecosystem coupling. The results show that the industrial development model of Yuyang distric is farming-dominant, but Uxin banner is the grazing-dominant; Yuyang district has the tendency of pig, poultry production, but Uxin banner has the tendency of herbivorous animal production; the primary productivity, secondary productivity, A, B and SCD in those two areas are all increasing, and the SCD has the increase in the shape of "three-stage" in 27 years. In conclusion, this paper brings forward the developmental methods of farming and grazing ecosystems coupling in Mu Us sandland, it is expected to provide credible theory supports and direction to healthy development of the farming and grazing ecosystems.
APPLICATION OF VSP TECHNOLOGY IN THE DEVELOPMENT AND DEPLOYMENT RESEARCH IN COMPLICATED FAULT BLOCK RESERVOIR JIN 612
VSP技术在锦612复杂断块油藏开发部署研究中的应用

LIAO Cheng-jun,<br>
天然气地球科学 , 2005,
Abstract: 辽河油田锦612复杂断块油藏下第三系沙河街组三段浊积砂砾岩储层厚度变化大,分布不稳定,纵、横向非均质性都很强。在油田开发阶段,地质工作者的任务是对油藏及其参数做出预测,落实储层横向变化特征,搞清油藏的非均质性特征,降低开发井部署风险。常规地面地震方法难以精确地用于落实井旁精细构造和预测岩性、储层横向变化。介绍了VSP(垂直地震剖面法)技术的基本原理、零偏和非零偏两个方面的数据采集与处理。以锦612-22-36和锦612-8-20两口井为例阐述了VSP资料的应用情况及效果。VSP技术大大提高了三维地震资料的分辨率,在地震剖面与地质层位之间架起了一座桥梁,准确地落实了锦612断块北部、西部断层的位置,搞清了储层在北部、西北部方向上的分布特征,为锦612断块油田扩边挖潜提供了重要的依据。
TWO-STEP S THOMPSON-FDTD METHOD
Thompson-FDTD方法中的两步法

Liao Cheng,Ren Lang,<br>,任朗
电子与信息学报 , 1998,
Abstract: This paper combines the differential-Thompson transformation involved in hydromechanics with the finite difference time domain (FDTD) technique to form Thompson-FDTD method. This method is applied for the first time to calculate the electromagnetic scattering properties of arbitrarily shaped dielectric objects. This method has at least two obvious advantages: it can transform arbitrary shaped bodies into regular structures and thus the boundary conditions are matched accurately; it can wilfully dispose the grid distribution and thus better numerical accuracy is achieved. The numerical simulation further confirms its validity.
基于消费者选用潜水搅拌机的标准分析
Standard Analysis on Choosing Submarine Bleater Based on Consumers
 [PDF]

,
Advances in Environmental Protection (AEP) , 2014, DOI: 10.12677/AEP.2014.42004
Abstract:
潜水搅拌机是污水处理工艺中很常见的设备,其选型、安装和运行不仅影响潜水搅拌机所在污水池水质的净化效果,而且对其运行时电能的消耗也有影响。本文基于消费者的角度主要对选用潜水搅拌机的型号、安装和运行等方面的参考标准加以明细阐述,以便消费者在选用此设备时有据可循,达到节能降耗。
Submarine bleaters are common equipments in Sewage treatment process. The equipment selection,installation and operation not only have effects on the result of purification of sewage but also have effects on power consumption. In this paper, based on consumers, some key standards on selection submarine bleater type, installation and operations are stated in detail. So that consumers could use the standards to save energy and reduce spend when choosing the equipment.
OBJECT-FITTED FDTD METHOD BASED ON MEI-ABC
基于MEI方法的贴体网格FDTD方法


红外与毫米波学报 , 2001,
Abstract: 利用Thompson变换在任意形状的散射体外部产生共形的外部计算网格,并使FDTD计算区域的截断边界与散射体边界形状完全一致,时域不变性测试方程(MEI)方法被作为该截断边界上的局域吸收边界条件,从而大大压缩了FDTD的计算空间.数值试验结果证实,该方法可在不降低计算精度的前提下减少计算机内存需求.
Mechanism of Affective and Cognitive-Control Brain Regions in Depression
抑郁症情绪加工与认知控制的脑机制

LIAO Cheng-Ju,FENG Zheng-Zhi,<br>,冯正直
心理科学进展 , 2010,
Abstract: Depression is characterized by a negativity bias which is a stable factor of it. The bias reflects enhanced bottom-up responses to affective stimuli,linked to deficits in amygdala and fusiform gyrus function. Alternatively,the bias also reflects impaired top-down cognitive control,linked to deficits in dorsolateral prefrontal cortex and anterior cingulate function. A new hypothesis that the occurrence of depression is caused by interaction of increased activity in affective brain regions and deficits in cog...
A New Method for Nonlinear System Control
非线性系统的一种直接控制方法

Zhong Yanjong,Liao Fucheng,Yang Yushu,<br>钟延炯,,杨遇术
自动化学报 , 1994,
Abstract: 非线性系统的一种直接控制方法钟延炯,廖福成(北京科技大学自动化系100083)杨遇术(兵总北方车辆研究所)关键词非线性控制系统,最优控制,PID调节器1引言对于非线性系统的研究,人们提出了许多方法,例如线性化方法、谐波线性化方法、描述函数法,近年来又...
ON STABILITY STUDY OF NEURAL NETWORKS WITH RANDOM PERTURBATION
神经网络随机扰动稳定性研究

Liao Guisheng,Jiao Lichen,Bao Zheng,<br>桂生,焦李,保铮
电子与信息学报 , 1992,
Abstract: Based on the theory of stochestic differential equation, the stability of a kind of generalized continuous-time Hopfield neural network with white noise perturbation is studied, and the related stability criteria and design requirements of neural networks are established.
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