摘要：The structure parameters of 6-degree of freedom(DOF)vibration isolation platform have a significant effect on its *** make the designed vibration isolation platform perform well,non-dominanted sorting genetic algorithm version II(NSGA-II)was applied to optimize its structure based on the transfer matrix method for multibody ***,the Jacobian matrix of 6-DOF vibration isolation platform was solved based on ***,the transfer equation of 6-DOF vibration isolation system was established by the linear transfer matrix method for multibody *** the formula of its natural frequency was derived according to the boundary conditions of the ***,the manipulability index was constructed based on a dimensionless Jacobian *** a new performance index function was established considering the influence of dynamic isotropic and legs ***,genetic algorithm(GA)and NSGA-II were used to optimize the structure of the 6-DOF vibration isolation platform under the same conditions,*** showed that NSGA-II had higher optimization efficiency,better calculation accuracy and shorter optimization time than that of ***,NSGA-II was adopted for multi-objective optimization design of 6-DOF vibration isolation platform based on the constraint *** Pareto solutions were obtained,which provides structural parameters for subsequent design ***,the proposed optimization method and the performance index in this paper provide a theoretical basis for the optimal design of relevant vibration isolation mechanism.

摘要：The ability to controlled introduction of defects, particularly twin defects in Pt-based nanocrystals （NCs） provides a possibility to regulate the performance of Pt-based nanocatalyst. However, because of the high internal strain energy existed in twinned structures, the fabrication of defects in Pt-based NCs is sufficiently challenging. Here we demonstrate a ＂low-temperature interface-induced assembly＂ approach that provides precise control over Pt-Cu nanoparticles assembled at the hexadecylamine/water interface, yielding onion-like Pt-Cu NCs exposed a high density of twin defects. Moreover, a bending mechanism is proposed to elucidate the appearance of twin defects and lattice expanding （contraction） based on aberration corrected scanning transmission electron microscopy analysis. This work opens new routes to engineer defects in metal- based alloy NCs, enabling more opportunities in catalysis.

摘要：Efficient photogenerated carrier migration/separation plays a critical role in increasing the photocatalytic performance of g-C_(3)N_(4).Herein,sulfonic acid group-functionalized g-C_(3)N_(4)(SACN)was synthesized and then synchronously strengthened by a facile-solid-state thermal reaction of g-C_(3)N_(4)and sulfamic *** a solid strong acid,sulfamic acid can be used to achieve acid etching on the surface of g-C_(3)N_(4)with the assistance of thermal treatment,leading to an enlarged specific surface area and increased surface catalytic reaction *** importantly,our experiments and density functional theory calculations indicate that the driving force generated by the negative inductive effect of sulfonic acid groups significantly improves the charge transfer dynamics and effectively inhibits their ***,the negative inductive effect can induce charge redistribution,which reduces the conduction band potential of g-C_(3)N_(4)to enhance the reduction ability of photo-induced *** a result,the SACN-400 sample showed excellent photocatalytic performance in H2 generation with an apparent quantum efficiency of 11.03%at 420±15 nm,as well as an efficient photodegradation rate for organic pollutants.

摘要：目的研究视觉文化语境下广告文化性的构建方法以及视觉文化元素在表现广告视觉意象时的应用。方法基于视觉文化本体论,通过对广告视觉符号文化性构建体系及"有意味的形式"的阐释,结合广告创意设计的程序与方法,从社会生活中挖掘生动、鲜明的文化元素。结论通过创新将文化元素融入到雀巢(中国)咖啡的广告创意设计实践中,以此研究广告视觉符号文化性的构建以及视觉元素意象表现的方法与原理。

摘要：高功率电脉冲装置常使用电容分压器监测其电压值。电容分压器的幅度线性度表征了分压器在大电压与小电压下分压比的一致程度。线性度的好坏直接关系到监测的电压值的准确程度。本文对陶瓷电容分压器进行原理分析,并通过仿真软件在脉宽为200 ns的矩形脉冲高压源(500 V^4 kV)与半高宽约为10μs的冲击高压源(10~100 kV)下分别对陶瓷电容分压器的性能进行仿真,并设计加工。之后分别采用两种高压源对分压器进行实验研究,研究显示,陶瓷电容分压器的幅度线性度在500 V^100 kV之内为1.5%,线性度较好,可以将小信号下校准的分压比用于大信号的测量中。

摘要：An optimization method for time-delayed feedback control of partially observable linear building structures subjected to seismic excitation is proposed. A time-delayed control problem of partially observable linear building structure under horizontal ground acceleration excitation is formulated and converted into that of completely observable linear structure by using separation principle. The time-delayed control forces are approximately expressed in terms of control forces without time delay. The control system is then governed by Itoe stochastic differential equations for the conditional means of system states and then transformed into those for the conditional means of modal energies by using the stochastic averaging method for quasi-Hamiltonian systems. The control law is assumed to be modal velocity feedback control with time delay and the unknown control gains are determined by the modal performance indices. A three-storey building structure is taken as example to illustrate the proposal method and the numerical results are confirmed by using Monte Carlo simulation.

摘要：新理念公路设计在我国已实践了多年,但仍存在不少问题,最突出的是公路设计中缺乏创意生成方法的指导,而这是硬科学难以解决的问题.基于此,引入可拓学理论与方法,以新理念边坡设计方法为切入点,分析运用可拓思维模式进行公路边坡创意设计的可行性和方法.实例分析表明,将可拓思维模式运用于新理念边坡设计是合适和可行的,可供相关学者和技术人员参考.

摘要：When modeling wave propagation in infinite space, it is necessary to have stable absorbing boundaries to effectively eliminate spurious reflections from the truncation boundaries. The SH wave equations for Perfectly Matched Layers （PML） are deduced and their Crank-Nicolson scheme are presented in this paper. We use the second-, sixth-, and tenth-order finite difference and pseudo-spectral algorithms to compute the spatial derivatives. Two numerical models, a homogeneous isotropic medium and a multi-layer model with a cave, are designed to investigate how the absorbing boundary width and the algorithms determine PML effects. Numerical results show that, for PML, the low-order finite difference algorithms have fairly good absorbing effects when the absorbing boundary is thin, whereas, high-order algorithms always have good absorption when the boundary is thick. Finally, we discuss the reflection coefficient and point out its shortcomings, which is why we use the SNR to quantitatively scale the PML effects,

摘要：Through in-depth analysis of advertisement slogans,the present study probes into the unique contribution of trancreation in conveying brand messages and triggering emotional resonance of the *** study firstly outlines theoretical basis of transcreation from the perspective of Communicative Translation Theory,emphasizing its uniqueness in the traditional translation *** the four key steps of transcreation,including in-depth understanding of the brand essence,sensitive response to cultural differences,flexible use of language skills,and incorporation of creative elements,are examined by means of case analysis in advertisement ***,the article sums up the positive impact of transcreation on cultural exchange,brand communication and translation field,particularly in the era of globalisation.

摘要：本文结合教学论述案例教学法在广告创意教学运用中的相关问题。