S模式机载应答机的中频数字化处理

介绍了S模式机载应答机的中频数字化处理的设计方法.采用FPGA和高速A/D转换器实现了80 MHz的高速数字信号处理系统,解决了传统二次监视雷达(SSR)目标分辨力差、窜扰等问题,完成了二进制振幅键控(ASK)和二进制差分相移键控(DPSK)组合成的询问信号的中频数字化处理全过程.     

基于PCA的小波多分辨图像融合方法

提出小渡多分辨率下主成份分析（PCA）的图像融合方法。首先利用小波变换对融合图像进行多分辨率分解，然后利用主成份分析方法确定图像小波低频近似系数的洎适应融合权重，采用局部区域“能量”法进行小渡高频细节系数的融合，最后将小波融合系数逆变换实现图像的融合处理。实验结果证实融合图像的目标特征突出，易于目视解译。     

小波分析在信号奇异性检测中的应用

研究了信号的奇异性检测问题。给出小波变换和信号奇异性的关系，实现小波分析对信号各类奇异间断点的有效检测，利用小波分析构造故障诊断所需的特征因子（或直接提取对诊断有用的信息），从而将该方法推广到各类冲击响应信号的奇异性检测中。最后给出一个实例进行验证。     

基于高频谐振CVT二次回路检测方法的研究

主要分析利用高频谐振原理检测CVT(电容式电压互感器)二次回路接线的可行性,即通过在CVT一次侧加高频信号的方式,利用合理设计的外围电子电路与CVT进行耦合传输高频信号,在二次绕组接线端检测高频信号,从而利用检测到的高频信号进行间接检测整个二次回路的正确完好。     

基于安全重构滤波器的小波变换系统分析

在图像处理中,采用Mallat算法实现重构信号,借用完全重构滤波器的思想,得到一种双正交结构以及双正交小波变换系统,探讨利用滤波器设计方法构造有理系数双正交小波。     

小波去噪理论及MATLAB实现研究

阐述了小波变换去除信号噪声的基本原理和方法,研究利用小波变换技术对信号噪声进行抑制和去除非平稳信号的噪声。然后利用MATLAB软件编制程序实现了基于小波变换的正弦信号的去噪仿真分析,仿真结果表明小波变换去除噪声具有很强的实用性。     

浅析小波变换理论及其应用

本文介绍了小波变换的发展历史,基本原理,比较了小波变换与傅立叶变换的各自不同的特点,讨论了当今传输系统中小波变换的应用,通过这些介绍分析,得出小波变换算法在信号处理、瞬态分析、图像处理等方面的优势,最后对小波变换理论的发展及其应用前景作了展望。     

基于不可分离MRA的快速小波去噪图像重建

提出了一种基于不可分离MRA的小波去噪重建算法.算法将投影数据进行二通道的小波分解,从而直接得到小波的近似系数和细节系数,对这些小波系数进行基于小波的阀值化去噪处理,再经过逆小波变换就得到了最终的重建图像.算法降低了复杂度,与可分离MRA重建算法比较速度更快,并且可以去噪.     

一种利用线性调频信号的新型扩频调制技术

根据上扫频和下扫频线性调频(LFM)信号的特性，针对传统的超宽带无线通信系统中线性调频扩频技术存在的调制效率低、误码率性能低、实现复杂高等问题，结合线性调频（Chirp）扩频以及循环移位编码(CCSK)扩频，提出了一种基于线性调频信号的循环移位线性调频扩频技术(CS-CSS)。首先，将输入数据映射在循环移位因子(CSF)上；然后，根据CSF数值对基带所产生的Chirp信号进行循环移位达到调制的目的；最后，在解调端经过加窗处理、快速傅里叶变换（FFT）得到与发射端对应的CSF，从而得到发送的数据。误符号率的仿真结果与理论推导公式相吻合，从调制效率和误码率性能上讲，该方案相比线性调频二进制正交键控(Chirp BOK)系统具有超过10 dB的误码率性能。因此，该方案具有更好的误码率性能、更高的调制效率及实现更低的复杂度。     

人民币汇率预测的小波方法研究

应用小波变换提出一种人民币汇率预测的方法。首先应用小波变换对人民币汇率序列进行分解,得到低频部分和高频部分;然后。对低、高频部分作进一步分析,以确认它们都存在混沌特性;再应用混沌理论分别建立低、高频部分的预测模型,进行预测;最后应用小波理论对混沌模型预测的结果予以重构,实现对人民币汇率的预测。以人民币兑美元日汇率序列为...     

美国国际贸易法院判定美国商务部对河北兴茂轮胎有限公司非公路用轮胎“双反”措施不当案评述

美国进口商和中国出口商不满美国商务部对来自中国的某些非公路用轮胎实施反倾销和反补贴税的裁定,向美国国际贸易法院提出起诉。美国国际贸易法院裁定,美国法律没有明确规定反倾销税法是否可适用于非市场经济国家;本案中美国商务部做的"双反"裁定,在方法上不合理。本文在介绍该案的基本案情、归纳法院推理和判决的基础上,对该案涉及的法律问题做了简要评论。     

How do economic,cultural, and global-connectedness distances moderate the effect of customers’ experiences on their intention to revisit non-indigenous restaurants? Evidence from Korean restaurants

In this study, we evaluate how the effect of customers' experiences on revisit intention for non-indigenous restaurants can be moderated by economic distance (ED), cultural distance (CD) and global-connectedness distance (GD) between the country of origin for a given non-indigenous restaurant and the customer’s resident country. Surveys were conducted in seven countries across three continents, and the levels of ED, CD and GD between Korea and the seven countries were used as moderators. The findings suggest that the types of food and staff are two elements that should be emphasized in countries that are relatively close to Korea. Conversely, elements like the atmosphere of the restaurant and word of mouth should be emphasized in countries that have greater distances from Korea. Of the three distances considered in the study, GD had the strongest moderating effect on the relationship between customers’ experiences and their intentions to return to the restaurant. As a whole, the results imply that ED, CD and GD are important points of reference when considering prior experience while selecting a target country based on the strength of the restaurant’s experience management.     

The political market for immigration restrictions: Model and test

This paper addresses the important question of whether public investment spending on economic infrastructure enhances economic growth in Mexico. It estimates a Cobb-Douglas production function that includes public infrastructure capital. Using cointegration analysis, the paper estimates a vector error correction model (VECM) for the 1995?–?99 period. The results suggest that there is a long-term stable relationship among the variables included in the VECM. The evidence also indicates that both public infrastructure spending and private capital formation have a positive and highly significant effect on the rate of output growth. Finally, the impulse response functions (IRF) and the variance decompositions (VDC) of the endogenous variables in the VECM suggest that the response of private capital to public infrastructure is positive while the reverse causation is not affirmed. From a policy standpoint, the findings call into question stabilization policies that disproportionately reduce public infrastructure to meet targeted reductions in the fiscal deficit (JEL, O1, O47, O54).     

PTE,innovation capital and firm value interactions in the biotech medical industry

Unlike previous studies which only focus on the main effect between IC and FV, this research includes PTE with the gap of resource-based view. IC is a key element in creating a competitive advantage, as it has a great influence on FV. A company may put relatively less into IC if it demonstrates higher efficiency. However, previous studies have neglected the fact that relative efficiency and IC affect FV and stock returns directly and indirectly. The research period was from 2006 to 2010 and the main research methods include HRA and DEA. The main research findings include the following. (1) There is a space for improvement in terms of the total technical efficiency. (2) PTE has a significant moderating effect between IC and FV. (3) IC and PTE have a significant influence on FV. (4) Apart from PTE and stock returns, IC and FV show significant differences within the sub-industry.     

基于风险调整收益方法的企业信用风险管理研究

文章根据风险调整收益（RAROC）的原理,借鉴J.P.摩根的信用计量CreditMetrics模型中信用等级转移的思想,构建了应收账款回收期内受信企业信用状况转移矩阵,并据此计算出企业信用VaR值和经济资本CaR值,进而计算RAROC比值,可为企业信用销售决策提供依据。通过将RAROC方法引入企业信用风险管理体系,可以对企业经营活动进行基于风险的绩效考核和业绩评价,以期提高企业信用风险管理水平。     

高效液相色谱-电感耦合等离子体质谱法测定粉质化妆品中的六价铬

采用高效液相色谱（HPLC）与电感耦合等离子体质谱（ICP-MS）联用技术,建立了粉质化妆品中六价铬的测定方法。样品经0.05 mol/L氢氧化纳溶液超声振荡提取;HPLC采用Hypersil GOLD C18柱分离,以5%（v/v）甲醇-2 mmol/L四丁基硫酸氢铵水溶液（pH 4.0）作为流动相;ICP-MS测定选用碰撞池技术以消除40Ar12C对52Cr的谱学干扰。方法学研究结果表明,添加水平为0.040-2.000 mg/kg时,回收率为77.5%-107.5%,相对标准偏差（RSD）小于10%。     

Is the cure worse than the disease? The effect of emerging market MNEs on host country corruption

In recent years, there has been an exponential increase in the amount of foreign investment by emerging market multinational enterprises (EMNEs). While it has been debated whether EMNEs strengthen or weaken the institutions in host countries they invest in, the literature has paid limited attention to how EMNE investment impacts corruption in other emerging markets, one of the most significant destinations of EMNEs. Following Hoskisson et al. (2013), we categorize two types of emerging markets as targets of EMNE investment, a) low-income emerging markets and b) middle-income emerging markets, based on their institutional and market development. Building on the theory of firm-specific advantages (FSAs) and the institutional advantage (IA) of EMNEs, we reason that EMNEs enter foreign markets in accordance to where their skills and competencies can be effectively utilized, and this impacts corruption in the host country. We make two key arguments: (1) EMNEs predominantly use their IA in low-income emerging markets, which in the long term increases corruption in the host market, and (2) EMNEs predominantly use their FSAs to gain competitive advantage in middle-income emerging markets, which decreases corruption in the host market. Empirical analysis of Chinese outward FDI from the 2008-2018 period supports our hypotheses. Our research contributes to both the literature on EMNEs and corruption.     

供应链和虚拟企业:比较及转化

供应链管理和虚拟企业是已经在世界范围所采用的概念。这些概念包括一系列管理、组织和技术问题,公司为了提高竞争能力,开拓市场机遇,建立合作联盟。供应链管理是一种集成的管理思想,从战略上整体地整合供应商和顾客。虚拟企业是一种动态的临时组织形式,不同的企业为了开拓商业机遇而通过合作弥补自身竞争力的不足。虽然他们有各自的特点,但是也有共同点。     

Four decades of negative word-of-mouth and negative electronic word-of-mouth: A morphological analysis

Customers voice their negative brand experiences to their family and friends in the form of negative word-of-mouth (NWOM). Web 2.0 enables the sharing of NWOM in electronic format on various social media sites, online customer review forums, and blogs, which is known as negative electronic word-of-mouth (NeWOM). Researchers need to study the spread of NWOM/NeWOM to prevent adverse consequences for companies and suggest an optimal response for its redressal. Existing literature review studies have focused on word-of-mouth (WOM) and electronic WOM (eWOM) and have considered both positive and negative WOM and eWOM concurrently. Past literature reviews have captured the breadth of the WOM domain, ignoring the depth. This research article contains a review of 282 journal papers capturing the depth of the extant literature by focusing solely on ‘negative’ WOM and eWOM (NWOM and NeWOM), and presents a broad view of the NWOM and NeWOM domains using morphological analysis (MA). This will help to conceptualize and categorize the existing state-of-the-art literature into broad dimensions and identify future research opportunities. The MA framework helps to bifurcate this literature into the following four dimensions: (i) nomenclature of NWOM and NeWOM, (ii) antecedents of NWOM/NeWOM, (iii) impacts of NWOM/NeWOM, and (iv) prevention and recovery response to NeWOM. Further dissection of these four dimensions leads to 15 sub-dimensions and 217 variants. Combinations of the 217 variants enable the identification of 550 novel future research opportunities in the area of NWOM and NeWOM.     

Why Consumers in Developing Countries Prefer Foreign Brands: A Study of Japanese Brands in Vietnam

ABSTRACT

Building on social-identity theory, the research develops a model for understanding of the impact of consumer identification with a nation on consumers' brand evaluations. It posits that developing-country consumers' identification with a foreign (developed) nation influences three factors—consumer-based brand equity, consumer-based country image, and consumer-based brand credibility. The research was informed by data from 400 Vietnamese consumers in relation to two Japanese brands Sony and Honda and analyzed using structural equation modeling (SEM). The findings show that Vietnamese (developing-country) consumers prefer Japanese (developed-country) brands over domestic brands, when these consumers identify with the developed nation.