转型期城市社会边际人格产生与城市规范确立

转型期城市社会生活环境的变化,既给人们的生活带来了便捷与舒适,又使得人们在传统与现代中徘徊,从而导致人格分裂,产生边际人格。为了有效地确立城市规范,必须从心理和法律等方面着手,采取有效措施消除边际人格的负面影响,构建和谐、健康的城市生活。     

论城市群的协调能力

从城市群内部协调能力和外部协调能力两个方面衡量城市群的协调能力.通过研究发现,相对于辽宁城市群而言,中原城市群的经济发展协调能力更强一些.整体看我国城市群的内部协调性还不是很强,城市群内各城市产业同构化程度加剧、重复建设问题严重、地方保护主义短期行为及缺乏有效的利益协调机制.提高城市群的协调能力,一方面应该统一协调各城市的政府、经济行为,建立有效的利益协调模式;另一方面应该实现交通运输等网络型基础设施的统一规划与互联互通.     

数字系统设计中边界扫描测试诊断策略

本文介绍了边界扫描技术及其IEEE 1149.1标准。包括它的基本原理、硬件和测试策略,以期引起同行对BST这一在国内尚属发展阶段的技术的广泛关注。     

Life cycle assessment in the environmental impact evaluation of urban development—a case study of land readjustment project, hyogo District, Japan

In this paper, the Life Cycle of Urban Development was firstly analyzed, and the phases of Life Cycle Assessment applied to Urban Development (ULCA) were described. As a case study, ULCA was applied in the environmental impact assessment of the land readjustment project of Hyogo District of Saga, Japan. In addition, mitigation proposals for reducing CO2 were also presented and the relevant environmental effects were simulated.     

Life cycle assessment in the environmental impact evaluation of urban development—a case study of land readjustment project,Hyogo District, Japan

BACKGROUNDLifeCycleAssessment (LCA)includesanattempttoevaluatetheenvironmentalaspectsofaproductoraserviceincradle to gravefashion .ThefirststudyonLCAwasperformedbytheU .S .MidwestResearchInstituteforCoca ColaCompanyin 1 969(U .S .EnvironmentalProtec tionA…     

边界元法解二维弹性力学问题体积分的处理

二维力学问题中，当有如ａｉ（ｙ）ｘｉ或ｂｉ（ｘ）ｙｉ型的复杂荷载时，给出了如何将体积分近似转换为边界积分的方法．     

具有转向点的非线性系统的奇异摄动

１　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｓｉｎｇｕｌａｒｌｙｐｅｒｔｕｒｂｅｄｄｉｆｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｓｗｉｔｈｔｕｒｎｉｎｇｐｏｉｎｔｓａｒｅｖｅｒｙｉｍｐｏｒｔａｎｔｆｏｒｍａｔｈｅｍａｔｉｃｉａｎｓａｎｄｐｈｙｓｉｃｉｓｔｓｓｉｎｃｅｔｈｅｓｅｐｒｏｂｌｅｍｓｅｘｉｓｔｗｉｄｅｌｙｉｎｍａｎｙｐｒｏｂｌｅｍｓｏｆｐｈｙｓｉｃｓ．ＴｈｅｐｒｏｂｌｅｍｓｗｉｔｈｔｕｒｎｉｎｇｐｏｉｎｔｓｗｅｒｅｓｔｕｄｉｅｄｂｙＷｅｎｔｚａｌ,Ｋｒａｍｅｒｓ,Ｂｕｌｌｏｕｎｉｎ［１］,Ｌａｎｇｅｒ,Ａ…     

CPV边界积分的对称数值求积法

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｔｈｅｂｏｕｎｄａｒｙｉｎｔｅｇｒａｌｅｑｕａｔｉｏｎｓａｒｉｓｅｉｎｍａｎｙｐｒｏｂｌｅｍｓｏｆｐｈｙｓｉｃｓａｎｄｅｎｇｉｎｅｅｒｉｎｇ .Ｏｎｅｏｆｔｈｅｐｒｉ ｍａｒｙｍａｔｈｅｍａｔｉｃａｌａｎｄｎｕｍｅｒｉｃａｌｄｉｆｆｉｃｕｌｔｉｅｓｏｆｂｏｕｎｄａｒｙｉｎｔｅｇｒａｌｅｑｕａｔｉｏｎａｐｐｅａｒｓｔｏｂｅｔｈｅｔｒｅａｔ ｍｅｎｔｏｆｔｈｅｓｉｎｇｕｌａｒｋｅｒｎｅｌｓ.Ｔｈｅｒｅａｒｅｔｈｒｅｅｄｉｆｆｅｒ ｅｎｔｔｙｐｅｓｏｆｓｉｎｇｕｌａｒｉｔｉｅｓ…     

圆柱坐标系下用于FDTD的总场-散射场连接边界条件研究

在三维柱坐标系下给出了麦克斯韦方程在完全匹配层(PML)吸收边界条件中的时域有限差分(PDTD)表达式,从而把FDTD推广到三维复柱坐标系中并加以实现.为了模拟柱面波在空间的传播,给出了在柱坐标系下完整的总场和散射场的连接边界条件.最后,模拟了柱面波在自由空间中的传播及空心圆柱体在柱面波入射下的近场和远场散射特性.     

A Novel Absorbing Boundary Condition for the Frequency—Dependent Finite—Difference Time—Domain Method

A new absorbing boundary condition(ABC) for frequency-dependent finite-difference time-domain algorithm for the arbitrary dispersive media is presented.The concepts of the digital systems are introduced to the (FD)^2TD method.On the basis of digital filter disigning and vector algebra,the absorbing boundary condition under arbitrary angle of incidence are derived.The transient electromagnetic problems in two-dimensions and three-dimensions are calculated and the validity of the ABC is verified.     

Parallel programming characteristics of a DSP-based parallel system

INTRODUCTION DSP-based parallel system is a kind of high- performance parallel computer which uses parallel accelerating boards based on SHARC DSP chip (Kuo and Gan, 2005) as plug-in boards and inserts them into the military reinforcing computer, military fault-tolerant computer, even the personal computer. The parallel accelerating board based on SHARC DSP is a high-performance parallel processing board-level product developed by the Wuhan Digital Engineering Institute and is su…     

城市形象与城市旅游关系初探

旅游活动是随着人类社会发展而产生的。我国改革开放以来,旅游业包括城市旅游有了长足的发展。笔者以为良好的城市形象将弱化旅游业发展中的不利因素、城市形象的设计与建设将推动城市旅游业发展,旅游业的发展有助于城市形象尤其是城市旅游形象的塑造,二者之间是双向依赖、相互促进、共同发展的关系。最后指出了在城市形象建设中应该注意的问题。     

4-component 2-D CFDFD method in analysis of lossy circular waveguide with fractal rough surface

In this paper, equivalent surface impedance boundary condition (ESIBC), which takes fractal parameters (D, G) into SIBC, is implemented in the 4-component 2-D compact finite difference frequency domain (2-D CFDFD) method to an- alyze the propagation characteristics of lossy circular waveguide with fractal rough surface based on Weierstrass-Mandelbrot (W-M) function. Fractal parameters’ effects on attenuation constant are presented in the 3 mm lossy circular waveguide, and the attenuation constants of the fi...     

适用于ADI-FDTD的基于线性插值的吸收边界条件及其改进方法(英文)

基于线性插值的方法提出了一种适用于交替方向隐式时域有限差分法(ADI-FDTD)的吸收边界条件,该边界条件能够在ADI-FDTD方法中改善边界反射性能.首先,对由截断误差和相速估计误差引起的此吸收边界条件的反射进行了分析和推导.通过理论分析,说明了基于相速估计和非均匀网格的对此吸收边界改进方法能够改善边界条件的反射特性.然后进行了矩形波导情况下该吸收边界条件的数值仿真.最后给出了数值仿真结果,并通过对有无相速估计下吸收边界条件反射系数比较、对均匀和非均匀网格处理下吸收边界条件反射系数的比较,以及对在不同时间步长下吸收边界条件反射系数变化的分析,说明了该吸收边界条件及其改进方法对ADI-FDTD方法中的边界反射性能有很好的改善效果.     

Error analysis for remote nonlinear iterative learning control system with wireless channel noise

In this paper, the iterative learning control problem is considered for a class of remote control system over wireless network communication channel. The control performance of remote iterative learning control (R-ILC) system is analyzed and an error boundary of the stable output of the R-ILC system is obtained for the boundary stochastic noise channel. Finally, we obtain some rules to reduce the fluctuation caused by wireless channel noise through the analysis results for fluctuation boundary. The simulation results prove the proposed rule is correct.     

Numerical simulation of interaction between laminar flow and elastic sheet

A numerical simulation of the interaction between laminar flow with low Reynolds number and a highly flexible elastic sheet is presented. The mathematical model for the simulation includes a three-dimensional finitevolume based fluid solver for incompressible viscous flow and a combined finite-discrete element method for the three-dimensional deformation of solid. An immersed boundary method is used to couple the simulation of fluid and solid. It is implemented through a set of immersed boundary points scattered on the solid surface. These points provide a deformable solid wall boundary for the fluid by adding body force to Navier-Stokes equations. The force from the fluid is also obtained for each point and then applied on the boundary nodes of the solid. The vortex-induced vibration of the highly flexible elastic sheet is simulated with the established mathematical model. The simulated results for both swing pattern and oscillation frequency of the elastic sheet in low Reynolds number flow agree well with experimental data.     

上博竹书(三)《周易》“亡忘又疾,勿药又菜”试析

对《上海博物馆藏战国楚竹书》(三)《周易》简21“亡忘又疾,勿药又菜”这句话的理解,目前学术界有多种意见,我们通过与传世本对照,认为此句的“忘”通“妄”,作“妄为”解;“菜”通“喜”,作“病愈”解。此句意为“不妄为却偶染微疾,无需用药将自愈”。     

Solution of stress intensity factors of multiple cracks in plane elasticity with eigen COD formulation of boundary integral equation

The concept of eigen crack opening displacement (COD) can be defined as the COD of a crack in infinite plate under the tractions acting on the crack surface. By introducing this concept, the eigen COD formulation of boundary integral equation is proposed in this paper, together with the solution procedures for multiple crack problems in plane elasticity. With the proposed approach, the multiple crack problems can be solved with the conventional displacement discontinuity boundary integral equations in an it...     

伽达默尔哲学的七个关键术语

"存在之显现" 是伽达默尔的真理观念."时间性"指的是通过语言性、书写性、和诗歌的奇迹,产生了文本战胜历史"时间"而具有"同时性" 的奇迹."实践智慧" 是伦理方式选择善的理智."应用"的意思是当我们理解过去的某件事物时,我们同样领会它在今天是如何应用的 "传统"是指我们在语言中继承下来的态度和方法,在我们试图弄懂任何事物时都会在我们的意识中发生作用,而"效果历史意识" 是一种历史总结在发挥作用的意识.语言最典型地生存于交谈、问答、对话的平等交换之中.使人类团结在一起的的节日庆典是真正交流的基础.     

道:中国文化的字徽

道是中国化最根本的概念,它起源于原始仪式,理性化于先秦,关联到中国化的方方面面,通过与无、气、理的关联,与心、路、言的关联而展示了中国化的特质。