Research on the Application of Interactive Digital Image Design in Public Information Communication: Using Catering Advertisement as An Example

互联网时代的到来以及计算机智能软硬件的普及，使得我们接触到的文字信息日趋减少，人类已经慢慢地从通过文字获取信息跨越到从图像、声音、感知的多维空间中了解世界。在视觉时代背景下，作为一个全新的设计语言，相比于单纯的文字和图片的简单组合，数字影像具有更强大的唤起能力。随着数字技术的日趋成熟和大众审美水平的提高，人们不再满足于被动接受信息的受众角色，而是渴望在参与和互动中获取信息的同时成为信息的传播者。由于大众对获取信息主动性的追求，数字影像的可交互化设计功能得到越来越多的重视并广泛运用到信息传播的各个领域。 本论文从分析公共信息传播方式的演变出发，探究了公共信息传播走向可交互数字影像时代的发展原因...With the advent of Internet and the popularity of computer intelligence, we have less access to the text information. Human beings have slowly understood the world from images, sound and perception of the multi-dimensional space instead of the text. In the visual age, as a new design language, comparing to simple combination of text and pictures, digital images are more powerful to evoke. With the...学位：艺术学硕士院系专业：艺术学院_设计学学号：1862014115362

Evaluation of convective PCR for the detection of influenza A virus

目的评价热对流PCR应用于口岸现场甲型流感病毒快速检测的效果。方法设计热对流PCR的引物和探针,用于甲型流感病毒的检测。用甲型和乙型流感病毒毒株和入境发热人员的鼻咽拭子样本验证热对流PCR的检测灵敏度、特异性及稳定性,并与市售商品化实时荧光定量PCR试剂比较检测甲型流感病毒的效果。结果通过对8株甲型流感病毒和1株乙型流感病毒毒株进行检测,热对流PCR对H1、H3及H5亚型的甲型流感病毒毒株的检测下限为0.001~0.005HAU,具有较好的检测广谱性,且不与乙型流感病毒发生交叉反应。对155份鼻咽拭子样本进行检测,和实时荧光定量PCR相比,检测灵敏度为94.74%,特异性为97.44%,且具有很好的检测稳定性。结论热对流PCR具有很高的检测灵敏度和特异性,可用于口岸现场的甲型流感病毒快速筛查。Objective To evaluate the efficiency of convective PCR on rapid detection of influenza A virus at frontier ports. Methods The convective PCR primers and probe were designed for the detection of influenza A virus.Influenza A virus strains,influenza B virus strain and nasopharyngeal swabs of entry travelers with fever were used to analyze the sensitivity,specificity and stability of convective PCR. The detection efficiency of convective PCR was compared with commercial Real-time PCR kit. Results A broad detection spectrum of convective PCR was observed in testing 8 influenza A virus strains with different genotypes（H1、H3 and H5）and 1 influenza B virus strain,the detection limit of convective PCR for influenza A virus strain was 0.001 ~0.005 HAU. There was no cross reaction with influenza B virus. When convective PCR was applied to the detection of 155 nasopharyngeal swabs,comparison with Real-time PCR,the detection sensitivity was 94.74%,the detection specificity was 97.44%,and the detection stability was good. Conclusion Convective PCR had a high sensitivity and specificity,was fit for the rapid detection for influenza A virus at frontier ports.厦门市科技惠民计划项目（3502Z20174044）; 国家质检总局科技计划项目（2014IK045）; 福建省自然科学基金项目（2010J01152

Numerical study on the shock/combustion interaction of oblique detonation waves

To determine the shock/combustion interaction structure of a wedge-induced oblique detonation wave, high-order numerical simulations solving the two-dimensional reactive Euler equations embedded with a two-step chemical kinetic model have been performed. In this study, various dimensionless heat release amounts ranging from 40.0 to 52.5 are selected to investigate the flow configuration. The computational results show that four types of typical shock/combustion interactions, namely, Type VI, I, V and IV (following the classification of shock/shock interaction proposed by Edney), can be observed. The detailed structures and characteristics of the interaction types are presented and shown to be different than the classic shock/shock interaction. Additional insight into the transition principles of different shock/combustion interactions is illustrated through shock polar analysis. (C) 2020 Elsevier Masson SAS. All rights reserved

High-order simulation solving Navier-Stokes equations with Spalart–Allmaras turbulence model

The goal of this paper is to implement an accurate and robust solver for compressible Navier-Stokes equations coupled with the Spalart&ndash;Allmaras model, which possesses the capability of shock-capturing and predication of boundary layer and separated flow. In a given stencil width, a WENO-Z scheme equipped with Roe flux difference split method is used to calculate the inviscid flux, and central differencing scheme for the viscous terms are employed. The explicit Runge-Kutta is adopted for the temporal discretization. The simulation results of selected cases are given to verify the validation of the solver.</p

High resolution attitude angle measurement method and device

本发明涉及姿态角测量技术,具体地说是一种高分辨率姿态角度测量方法及装置。取处于静止状态的角速率传感器输出的模拟电压信号,对模拟电压信号进行低通滤波去除高频部分,然后进行信号采集和模/数转换,将其转换为电压信号。数据处理程序按照最小均方差算法对其进行数字滤波,再经均值滤波,获得实际零点电压;再用实际零点电压根据后续处于运动情况,依次经RC低通滤波、采集和模/数转换、最小均方差数字滤波及均值滤波的电压信号进行比较,对所得的差值数值积分得到姿态角度值。与传统方法相比,本发明可以在低频范围内获得很高的角度分辨率,并且可以通过改变数字滤波的参数在分辨率和实时性间进行调整

High resolution attitude angle measurement method and device

本发明涉及姿态角测量技术,具体地说是一种高分辨率姿态角度测量方法及装置。取处于静止状态的角速率传感器输出的模拟电压信号,对模拟电压信号进行低通滤波去除高频部分,然后进行信号采集和模/数转换,将其转换为电压信号。数据处理程序按照最小均方差算法对其进行数字滤波,再经均值滤波,获得实际零点电压;再用实际零点电压根据后续处于运动情况,依次经RC低通滤波、采集和模/数转换、最小均方差数字滤波及均值滤波的电压信号进行比较,对所得的差值数值积分得到姿态角度值。与传统方法相比,本发明可以在低频范围内获得很高的角度分辨率,并且可以通过改变数字滤波的参数在分辨率和实时性间进行调整

Numerical investigation of mode transition and hysteresis in a cavity-based dual-mode scramjet combustor

The effect of ethylene fuel equivalence ratio (ER) variation directions on combustion states in a dual-mode scramjet combustor was numerically investigated. The combustor employed transverse wall fuel injectors and downstream cavity flameholders without pilot fuel, which are fundamental components in many practical combustors. The isolator inflow Mach number was 3.1, and static pressure, stagnation pressure and stagnation temperature were 53 kPa, 2622 kPa and 1656 K, respectively. The ER was regulated abruptly in a piecewise constant manner, from 0.10 to 1.02, and then back to 0.10. A 3-D URANS method with a recognized two-step kinetics model was adopted. Results exhibited two combustion hysteresis loops, which indicated that different types of combustion mode transitions could result in hysteresis. The first was a hysteretic phenomenon between separated and shock-free scramjet modes based on steady quasi-one-dimensional combustor flow assumptions, and the second was between two different patterns of separated scramjet modes. Hysteresis mechanisms are elucidated from the viewpoint of combustion flow structures. The first hysteresis was attributed to flame stabilization mode transitions between the cavity shear-layer stabilized mode and the jet-wake stabilized mode, along with the transition hysteresis of a pre-combustion shock train's establishment and vanishment. The flame stabilization locations were greatly influenced by the flow separation states ahead of the fuel injectors, and the flow separations were in return determined by the flame distributions. The second hysteresis was attributed to transitions between weak-oscillation mode and intensive-oscillation mode with the transition hysteresis of shock reflection amount increase and decrease of the pre-combustion shock train structure, which were both in the jet-wake stabilized location. Flame in the low-speed region beside the separation bubbles ahead of the fuel injectors provided heat and hot radicals for downstream flame stabilization, and the pre-injector flame intensity greatly influenced the combustion oscillation states. (C) 2019 Elsevier Masson SAS. All rights reserved

一种进气道定堵塞度自起动试验装置

本发明公开了一种进气道定堵塞度自起动试验装置，包括:进气道，出口端设有延伸段：延伸段的内部设有堵块，两侧设有用于测量堵块位置的位移传感器，下端设有电磁铁；堵块与电磁铁通过堵块连接件连接，堵块连接件的一端与电磁铁的下端相接触，另一端与所述堵块固定连接；位移传感器包括传感器主体和滑动拉杆，滑动拉杆与堵块连接件固定连接；延时信号发生器，内部设有电磁铁电源；本发明进气道定堵塞度的自起动试验装置在获得了完整不起动振荡周期的同时，还在风洞有效运行时间范围内对其自起动过程进行了考察，且借助位移传感器对该过程进行了定量记录，保证了自起动试验的有效性和可重复性

内压缩波系对高超声速进气道自起动性能影响研究

为了探究进气道肩部膨胀扇以及不同压缩方式对进气道自起动性能的影响,结合具体的进气道构型,针对不同的压缩角、边界层厚度开展了马赫数4.0级的风洞试验研究。结果表明:在不起动分离区同侧的膨胀扇会对当地气流加速,降低局部压强,进而对压缩激波较强时的进气道自起动过程有明显改善。而唇罩分级压缩对二元进气道的自起动能力也有提高效果。此外,对比侧压模型与顶压模型的试验结果发现,边界层厚度对侧压模型自起动性能的影响趋势与顶压式存在明显的差异。与此同时,当自起动受限于几何喉道的进气道构型,压缩方式对进气道自起动性能的影响不明显,但是对于由压缩激波-边界层干扰诱导分离区形成的气动喉道决定能否起动的进气道,侧压方式有利于提高进气道的自起动性能