摘要：Mitigation of sonic boom to an acceptable stage is a key point for the next generation of supersonic transports. Meanwhile, designing a supersonic aircraft with an ideal ground signature is always the focus of research on sonic boom reduction. This paper presents an inverse design approach to optimize the near-field signature of an aircraft, making it close to the shaped ideal ground signature after the propagation in the atmosphere. Using the Proper Orthogonal Decomposition(POD) method, a guessed input of augmented Burgers equation is inversely achieved. By multiple POD iterations, the guessed ground signatures successively approach the target ground signature until the convergence criteria is reached. Finally, the corresponding equivalent area distribution is calculated from the optimal near-field signature through the classical Whitham F-function theory. To validate this method, an optimization example of Lockheed Martin 1021 is demonstrated. The modified configuration has a fully shaped ground signature and achieves a drop of perceived loudness by 7.94 PLdB. This improvement is achieved via shaping the original near-field signature into wiggles and damping it by atmospheric attenuation. At last, a nonphysical ground signature is set as the target to test the robustness of this inverse design method and shows that this method is robust enough for various inputs.

摘要：A new optical system for an augmented reality(AR) display is proposed in this *** optical system mainly includes a ray deflector, coupling input grating, optical waveguide, and coupling output *** the ray deflector and the coupling input grating are designed based on the diffraction characteristics of the polarization grating, and the coupling output grating is the Bragg reflection *** with other AR schemes, this AR optical system not only reduces the number of projections from two to one, but also improves the efficiency of light coupling into the optical *** energy loss is reduced by utilizing the single-order diffraction characteristics of the polarization grating in its coupling input *** light deflector uses the polarization selectivity of the polarization grating and the characteristics of the rotating light of the twisted nematic liquid crystal layer to realize beam *** working principle of the optical system is experimentally and theoretically demonstrated.

摘要：钢丝绳中金属线间接触摩擦会影响捻制成形加工应力和结构强度。在经典的Coulom摩擦理论的基础上,本文采用augmentedLagrange方法计算钢丝绳捻制过程中的法向接触力和摩擦接触力,并应用radial return径向回映法修正摩擦接触力试算值。以钢丝绳一次捻制成形过程为例,分析并讨论了摩擦系数和自扭转系数对接触应力和加工应力应变的影响,为钢丝绳成形工艺和结构强度的合理设计提供依据。

摘要：This paper presents an image processing design flow for virtual fitting room (VFR) applications, targeting both personal computers and mobile devices. The proposed human friendly interface is implemented by a three-stage algorithm: Detection and sizing of the user's body, detection of reference points based on face detection and augmented reality markers, and superimposition of the clothing over the user's image. Compared to other existing VFR systems, key difference is the lack of any proprietary hardware components or peripherals. Proposed VFR is software based and designed to be universally compatible as long as the device has a camera. Furthermore, JAVA implementation on Android based mobile systems is computationally efficient and it can run in real-time on existing mobile devices.

摘要：Because of the evolution of markets and technologies, prototyping concerns should be kept updated almost day by day. Moreover, user centered design moves the focus towards interaction issues. Prototyping activities matching such characteristics are already available, but they are not so diffused in the industrial domain. This is due to many reasons;an important one is that a rigorous classification of them is missing, as well as an effective helping tool for the selection of the best activities, given the design context. The research described in this paper aims at defining a new classification of prototyping activities, as well as at developing a selection algorithm to choose the best ones in an automatic way. These goals are pursued by defining a set of characteristics that allow describing accurately the prototyping activities. The resulting classification is made by five classes, based on eighteen characteristics. This classification is exploited by the first release of an algorithm for the selection of the best activities, chosen in order to satisfy design situations described thanks to a different set of eleven indices. Five experiences in the field have been used up to now as a starting point for validating the research outcomes.

摘要：To meet the challenges of ubiquitous computing, ambient technologies and an increasingly older population, researchers have been trying to break away from traditional modes of interaction. A history of studies over the past 30 years reported in this paper suggests that Gesture Controlled User Interfaces (GCUI) now provide realistic and affordable opportunities, which may be appropriate for older and disabled people. We have developed a GCUI prototype application, called Open Gesture, to help users carry out everyday activities such as making phone calls, controlling their television and performing mathematical calculations. Open Gesture uses simple hand gestures to perform a diverse range of tasks via a television interface. This paper describes Open Gesture and reports its usability evaluation. We conclude that this inclusive technology offers some potential to improve the independence and quality of life of older and disabled users along with general users, although there remain significant challenges to be overcome.

摘要：随着2007年苹果公司推出最新的智能型行动装置（Smart Phone）之后，开启了智能型手机的时代，相对陆陆续续的APP不断设计出来被应用在不同领域，其中运用在旅游导览建置上更是逐年增加，其内容设计大多是以静态方式、固定板型呈现导览，或者结合Google Map进行路径导览，有鉴于此本研究采用新的Android新框架Actionbar Scrollable Tabs，结合扩增实境（Wikitude）与跨平台与行动网页技术Qquery Mobile），开发出扩增实境旅游导览系统，让用户可以选择实境方式透过手机屏幕取得目前景点信息，不用再像以往只能靠着地图导览旅游的缺点，只要透过本系统即能马上轻易体验实境旅游导览。

摘要：在旧金山国际机场南边一个家具店后面的一间暗室里,我眼前那张沙发的颜色和图案在不断变化,先是从红色变成蓝色,后来又变成了米黄色、灰色、白色和绿色的图案。