《热辣滚烫》:运动-影像中的姿态塑造与自然主义语言

德勒兹的经典“运动-影像”理论从哲学维度解释了电影艺术的多种表现形式,其变型“知觉-影像”“情感-影像”“动作-影像”共同构成了一种“动态的绵延分切”。据此分析春节档热门影片《热辣滚烫》,影片人物行为模式下情感的表达和人物“主动行动者”的姿态塑造更加明晰。另外,影片和日版影片《百元之恋》存在着价值表达上的区别,影片通过对原创世界的塑造关联着虚构性的现实,符合德勒兹对自然主义的哲学性解读。

一种按需装配的Agent

引言 近年来,智能体Agent的理念在很多研究领域都得到了相当的重视,有关的研究工作方兴未艾.随着研究工作的不断深入,出现了很多基于Agent的系统,虽然绝大多数还处于研发和实验阶段,但也出现了部分相对成熟的商业系统.例如General Magic公司的Odyssey系统就已经作为商业软件进入市场,运行在Sony,Motorola,AT&T等公司的PDA产品中,并取得了较好的发展[1].

女性在整形美容实践中的角色分析

随着经济的繁荣与医学的发展,整形美容业在我国悄然走俏,并逐渐成为一种普遍的大众消费形式。尽管整容导致毁容的事件频频出现,广大爱美女性仍不改初衷,前赴后继地加入"整形美容战"中。然而,女性在这场没有硝烟的战争中扮演着何种角色?对此大致有两种对立的观点:被动受害者和主动行动者。整容看似是一种自我的积极改变,本质却是通过"自残"抵抗自己无力改变的命运,因此广大女性应理性地看待这一行为,做出科学合理的决断。

“把”字句语法意义论析

过去对于"把"字句语法意义的几种解释都没有把握这种句式意义的基本特质。我们认为"把"字句的基本语义要求是表明行动的主动性,并因为叙述视点不同形成了外向和内向两种语义传递模式,由此演化出一些具体的句义类别。"把"字句的语法意义是基本语义、语义传递模式和具体句义类别构成的层次性系统。

Control Strategies and Mechanisms for Active Control of Sound Transmission into a Vibro-acoustic Enclosure

An analytical study was presented on active control of sound transmission into a vibro-acoustic enclosure comprising two flexible plates. Two types of actuators were used, i.e. acoustic actuator and distributed lead zirconate titanate piezoelectric (PZT) actuator instead of point force actuator. Using the modal acoustic transfer impedance-mobility matrices, the excitation and interaction in the coupled sound transmission system can be described with clear physical significance. With the control system designed to globally reduce the sound field, different control system configurations were considered, including the structural actuator on the incident plate, actuator on the receiving plate, acoustic actuator on the cavity, and their combinations. The effectiveness and performance of the control strategy corresponding to each system configuration were compared and discussed. The role and control mechanism of each type of actuator were of particular interest. It was shown that the incident plate actuator is effective in controlling the cavity-dominated modes and the structural modes dominated by the incident plate and receiving plate. Two main control mechanisms are involved in this control configuration, i.e., modal suppressing and modal rearrangement. For control system configuration with only acoustic actuator in the enclosure, the mechanism involved in this arrangement is purely modal suppression. Desirable placements of structural actuators in terms of total potential energy reduction were also discussed.

Dynamic Analysis of Landing Autonomous Underwater Vehicle

In autonomous underwater vehicles(AUVs) the onboard power used to complete missions is limited.To solve this problem,a landing AUV has been designed,which conserves energy by sitting on the seafloor while monitoring the ocean.In order to study the dynamic behaviors for better control of the AUV,the dynamic analysis of the landing AUV is presented in this paper.Based on the momentum theorem and the angular momentum theorem,the dynamic model of the landing AUV is derived.The simulations of rectilinear motion,rotary motion and helix motion indicate the dynamic behaviors of the AUV.The ocean experiments validate the dynamic model presented in this paper.The experiments also verify that the landing AUV can work for a longer time than common AUVs.

Review of actuators for high speed active flow control

Actuators are one of the key points for the development of active flow control technology.Efficient methods of high speed flow control can provide enhanced propulsive efficiency and at the same time enable safe and maneuverable high speed flight.The development of high speed flight technology promotes the emergence of novel and robust actuators.This review introduces the state of the art in the development of actuators that can be used in high speed active flow control.The classification and different operation criteria of the actuators are discussed.The specifications,mechanisms and applications of various popular actuator types including fluidic,mechanical,and plasma actuators are described.Based on the realistic need of high speed flow control and the existing results of actuators,a new actuator design method is proposed.At last,the merits and drawbacks of the actuators are summarized and some suggestions on the development of active flow control technology are put forward.

Active control of supersonic/hypersonic aeroelastic flutter for a two-dimensional airfoil with flap

The flutter, post-flutter and active control of a two-dimensional airfoil with control surface operating in supersonic/hypersonic flight speed regions are investigated in this paper. A three-degree-of-freedom dynamic model is established, in which both the cubic nonlinear structural stiffness and the nonlinear aerodynamic load are accounted for. The third order Piston Theory is employed to derive the aerodynamic loads in the supersonic/hypersonic airflow. Nonlinear flutter happens with a phenomenon of limit cycle oscillations (LCOs) when the flight speed is less than or greater than linear critical speed. The LQR approach is employed to design a control law to increase both the linear and nonlinear critical speeds of aerodynamic flutter, and then a combined control law is proposed in order to reduce the amplitude of LCOs by adding a cubic nonlinear feedback control. The dynamic responses of the controlled system are given and used to compare with those of the uncontrolled system. Results of simulation show that the active flutter control method proposed here is effective.