基于Channel Bank和网关的IPCB网关的设计与实现

提出了一种基于 Channel Bank和 Vo IP语音网关的将大客户语音接入 IP网络的IPCB方案。详细阐述了 IPCB的基本功能、体系结构及其设计原理。实际运行的结果表明 。

Development of E-banking channels and market share in developing countries

There is fierce global competition within the banking industry.Therefore,banks endeavor to grow and strive to increase their market share.We analyzed the effect of developing innovative channels of presenting bank services on banks’market share.The statistical population of this research was Shahr bank’s central headquarter and its branches in Tehran,Iran.We developed questionnaires for gathering the data.The validity and reliability of the scales were tested by EFA,CFA,experts’opinion,and Cronbach’s alpha.We used linear regression to assess the impact of innovative channels,including internet banking,automatic teller machines(ATMs),mobile banking,telephone banking(TB),and point of sales(POS)on banks’market share.The results indicated that some of these channels,including internet banking,POS,and TB,positively affect a bank’s market share.The effect of two other platforms,including mobile banking and ATM development,on banks’market share was rejected.The findings of this study expand our understanding of how bank managers can improve their market share by developing innovative e-banking channels.

Digital Channelization Technology for HF Communication Base on Fast Filter Bank

Channelization typically realized by digital filter banks is an important topic in high frequency(HF) communication and software defined radios(SDR) areas. Channelization has a rigorous requirement for the characteristic of frequency response, e.g., steep transitional band and sharp decay. To address this issue, we investigated the feasibility and implementation of applying fast filter bank(FFB) in channelization in this paper. We analyzed the butterfly structure of FFB similar with fast Fourier transform(FFT), in which prototype sub-filters are cascaded to achieve a low complexity. Hence, it is suitable for designing filter bank with steep transitional band and sharp decay in stop-band. Moreover, we designed a pipelined structure of FFB to achieve a balance between area and performance. Design example shows that FFB has lower computational complexity compared with the other filter banks.

A Non-Maximally Decimated Dynamic Reconfigurable Channelized Structure Based on Modulated Filter Bank

A structure of dynamic reconfigurable channelized filter bank is proposed in order to solve the problem that the uniform channelized receiver cannot receive the cross-channel and wideband signal. The dynamic reconfigurable channelized filter bank is divided into two parts-the analysis filter bank and the synthesis filter bank. The function of the analysis filter bank is to divide the received signal into several sub-signals according to the channel division. Then the sub-signals of each channel need to be detected and discriminated. At last, we use the sub-signals to reconstruct the original received signal by the synthesis filter bank. The analysis filter and the synthesis filter bank of the dynamic reconfigurable channelized filter bank are all efficient polyphase structures, so it can save more hardware resources and has extensive applicability. The structure is simulated by MATLAB and the simulation results verify the correctness of this structure.

高质量发展阶段货币政策传导渠道的有效性——基于银行流动性创造的视角

提升货币政策传导效率是高质量发展阶段现代中央银行制度建设的客观要求。鉴于我国货币政策面临着“宽货币”难以向“宽信用”传导的梗阻困境,本文从银行流动性创造理论视角提炼高质量发展阶段货币政策传导的典型事实,在此基础上,从流动性创造发挥货币政策中介目标功能应当具备的可控性、相关性和可测性出发,考察货币政策流动性创造渠道的机理,并利用上市银行2016—2022年季度数据展开实证检验。研究发现,在高质量发展阶段,随着金融体制市场化改革不断深入推进,银行经营模式从存贷业务模式向批发业务模式转变、货币政策调控框架从数量型向价格型转变,银行流动性创造渠道会比银行贷款渠道发挥更为关键的作用。中央银行应充分认识到银行流动性创造功能的重要性,并将流动性创造纳入货币政策调控的中介目标体系。

多BTT导弹滚转通道姿态约束下的固定时间姿态协调控制

针对多倾斜转弯(bank-to-turn,BTT)导弹在姿态约束下的滚转通道一致性安全控制问题,提出一种分布式固定时间姿态协调控制器。BTT导弹气动参数变化强烈、对机动要求高,对控制器提出了响应速度快、抗干扰能力强、且需满足姿态受限约束等要求。针对上述问题,基于固定时间控制技术、障碍Lyapunov函数,结合多智能体系统协调控制理论,对多枚BTT导弹滚转通道提出一种分布式固定时间姿态协调控制律。在所提协调控制律下,所有BTT导弹的滚转角可在固定时间一致收敛至给定的参考指令信号,且在控制过程中满足姿态约束条件。仿真结果表明了所提方法的有效性。

基于CNN和融合目标的三通道小波滤波器组识别

为解决目前需要人工选取二维不可分小波滤波器实现图像融合的问题,提出一种基于CNN和融合图像清晰度的二维三通道不可分对称小波的滤波器组自动择优分类方法。构造大量分布均匀的3×5对称小波滤波器组,并用其对多聚焦图像进行融合,根据融合结果对滤波器组设置融合清晰度高低的标签,并构造滤波器组的训练集和测试集;设计出分类的卷积神经网络,并进行训练得到模型;对训练集和测试集以外的滤波器样本进行识别与结果分析。实验结果表明:所设计的网络模型在测试集和测试集以外的数据集上的识别率分别为99.48%和99.58%,其分类结果中较好的滤波器类对多聚焦图像融合都有较高的清晰度。

Monetary Policy,Liquidity and Bank Risk-Taking

The great impact of monetary policy on bank risk-taking,facilitated by a liquidity mechanism,significantly complicates the macro-prudential supervision process.Surprisingly,limited scholarly research has delved into this particular issue.Hence,in this paper,the liquidity variable is introduced into the dynamic linear model to depict the liquidity mechanism by which monetary policy affects bank risk-taking.Based on micro-data from 133 commercial banks in China,this paper empirically tests using systematic Gaussian mixture models estimation and a panel smooth transition regression model.The findings reveal that while monetary policy does not exhibit a significant risk-shifting effect.A marked liquidity transmission effect,however,is observed,whereby easy monetary policy noticeably exacerbates bank risk-taking.This impact becomes more pronounced as liquidity levels improve.The most significant negative impact of monetary policy on bank risk-taking occurs when bank liquidity reaches approximately 43%.Moreover,when banks maintain high levels of liquidity,the statutory deposit reserve ratio exerts a greater regulatory effect than other monetary policy tools.Contractionary monetary policy imposes noticeably weaker restraints than expansionary monetary policy,particularly in banks with higher liquidity levels.Moreover,the interplay between monetary policy and bank risk-taking is contingent upon not just the liquidity level of banks,but also their asset size and capital adequacy.

东南亚侨汇与抗日战争——再论东兴汇路的起源与发展

东兴汇路是抗战时期中国沟通外部世界的重要战略通道。1907年,中国政府就在此地设立邮政机构并与法属越南互换国际邮件。本文以广东政府机构馆藏一手侨汇档案为基础材料,揭示了太平洋战争爆发之前由官方行局所初步构建并主导的东兴汇路就已存在并发挥作用的史实。以往学界主张这一汇路源于1942年春,将其主要归功于潮帮侨批局的说法并不科学。东兴汇路之所以能经受住太平洋战争的重大考验,关键是因为华南驻军、广东地方当局、官方行局此前已成功解决了私营侨批业难以独自应对的批路安保、头寸接济、侨批寄递等诸多难题。东兴汇路的存在及持续运转,不仅为太平洋战争爆发以后中国政府继续沟通东南亚侨汇、稳定战时广东财政提供了重要保障,而且还成为中共中央扩大国际统一战线、争取海外抗战资源的重要渠道。遗憾的是,战时环境和头寸不足及国家行局和广东地方金融机构在侨汇利益上的矛盾和争夺,却又在一定程度上影响了国家集中侨汇的能力和成效。

城镇流域综合护岸生态化治理体系建设应用

以普宁市汤坑溪(南切流)治理工程为例,开展该流域综合护岸生态化治理研究。针对河道现状排涝标准低、河道淤积,行洪能力下降、水质恶化等问题,对普宁市占陇镇内河海仔溪及其支流新寮沟、下寨沟与汤坑溪南切流支流朴兜沟进行综合治理,治理范围内10.13 km全河段进行清淤,重点河段进行护岸及绿道建设,工程建设后期从水环境与生态环境2个方面提出了保护措施,通过治理措施,可减少水流的阻滞,增加了河道过流能力,提高区域防洪标准,减少洪涝灾害,使两岸生态环境得到改善,河水水质得到净化。

黑龙江(阿穆尔河)河槽演变相关研究成果——俄罗斯科学院远东分院水生态所《Formation of the Riverbed Relief and River Banks》简析

在水文学的探索过程中,对河槽演变的研究是揭示河流流量变化、河流水势变化与研究流域自然地理演变的基础。在中国国内对黑龙江(阿穆尔河)流域的研究中,关于河槽演变的成果和分析不多。《Formation of the Riverbed Relief and River Banks》一书是由俄罗斯科学院远东分院水生态研究所(IWEP FEB RAS,文中简称IWEP)副所长阿雷克谢·尼古拉耶维奇·马奇诺夫教授为第一作者编著的,该书从东亚的地区特征出发,对黑龙江(阿穆尔河)河床地貌的形成与河槽演变过程作了详细的说明。全书共分为五章,共172页,附图片44张(9张是实景彩图),并有英语和俄语两版简介与结论。该书对黑龙江河槽演变的研究具有一定的参考价值。

Research progress in SAW filter banks

SAW (Surface Acoustic Wave) filter bank is a single input, single or multi-output device consisting of multi-SAW-filters with input interconnection network or switch circuits, and can be divided into two categories: channelizer (multi-output) and switchable (programmable, single output). The former is mainly used in military channelized receiver for spectrum analysis; the latter has wide application in frequency synthesizer and frequency-hopping radar and communication system receiver as anti-jamming filter, and has been widely used in various military electronic equipments ever since the 1970s. Research abroad was done mainly by Americans, few documents on related work done by Japan and Russia are available. Do-mestic research started in the 1980s, mainly by No. 26 Research Institute, China Electronics Technology Group Co., Institute of Acoustics, Chinese Academy of Sciences, No. 23 and No. 25 Research Institute, China Spaceflight Tech. Group Co. This paper first briefly introduces Chinese and foreign research on SAW filter banks; then discusses research progress in device design, the input interconnection network or switch circuit and miniaturization; and ends in a brief perspective of developing trends in future.

Effects of Spur Dyke's Orientation on Bed Variation in Channel Bend

Spur dykes also known as Groynes are often used to either divert or attract the flow from the main structure to safeguard their life.Those structures may be bridge piers,abutments or any similar hydraulics structures.Spur dykes are also used to save the cutting of banks on concave side of stream.Lots of work have been done in recent past on spur dykes by many investigators in which various hydraulic and geometrical parameters of spur dykes such as discharge,sediment size,flow velocity,shear stress,spur dykes shape,size and submergence etc.are studied in detail.But mostly all the studies were pointed out in straight open channels.Very few studies were done in curved channel and only their similar effects were studied.In present thesis main emphasis is given to study the effect of orientation and location of spur dykes in meandering channel on the bed of downstream side.In the present study experimental work has been carried out in 80°bend and constant discharge(Q=4.5 l/s)is allowed to pass in channel without spur dyke.It is found that maximum scouring occurs at angular displacementθ=60°to 80°in the vicinity of outer bank.To minimize this scouring,spur dyke has been installed at angular displacementθ=20°,40°&60°by changing the dyke angleα=60°,90°&120°respectively.It is found that scouring atθ=60°is reduced by installing spur dyke at angular displacementθ=40°which is oriented atα=60°and scouring atθ=80°is reduced by installing spur dyke at angular displacementθ=60°which is oriented atα=60°.

Evaluation of Preamble Based Channel Estimation for MIMO-FBMC Systems

Filter-bank multicarrier （FBMC） with offset quadrature amplitude modulation （OQAM） is a candidate waveform for future wireless communications due to its advantages over orthogonal frequency division multiplexing （OFDM） systems. However, because of or-thogonality in real field and the presence of imaginary intrinsic interference, channel estimation in FBMC is not as straightforward as OFDM systems especially in multiple antenna scenarios. In this paper, we propose a channel estimation method which employs intrinsic interference cancellation at the transmitter side. The simulation results show that this method has less pilot overhead, less peak to average power ratio （PAPR）, better bit error rate （BER）, and better mean square error （MSE） performance compared to the well-known intrinsic approximation methods （IAM）.

A Receiver Structure for Frequency-Flat Time-Varying Rayleigh Channels and Performance Analysis

This paper proposes a wavelet based receiver structure for frequency-flat time-varying Rayleigh channels, consisting of a receiver front-end followed by a Maximum A-Posteriori (MAP) detector. Discretization of the received continuous time signal using filter banks is an essential stage in the front-end part, where the Fast Haar Transform (FHT) is used to reduce complexity. Analysis of our receiver over slow-fading channels shows that it is optimal for certain modulation schemes. By comparison with literature, it is shown that over such channels our receiver can achieve optimal performance for Time-Orthogonal modulation. Computed and Monte-Carlo simulated performance results over fast time-varying Rayleigh fading channels show that with Minimum Shift Keying (MSK), our receiver using four basis functions (filters) lowers the error floor by more than one order of magnitude with respect to other techniques of comparable complexity. Orthogonal Frequency Shift Keying (FSK) can achieve the same performance as Time-Orthogonal modulation for the slow-fading case, but suffers some degradation over fast-fading channels where it exhibits an error floor. Compared to MSK, however, Orthogonal FSK provides better performance.

中国商业银行竞争和风险承担——基于多决策渠道机制的研究

选取2007—2019年220家中国商业银行非平衡面板数据,考察银行竞争对风险承担的影响,进而讨论多样化经营、流动性创造、贷款损失准备计提与银行资本四个决策渠道如何调节银行竞争对风险承担的影响。研究发现:银行竞争通过资产组合和杠杆风险显著增加银行风险承担;贷款损失准备计提与多样化经营决策不但减少银行风险承担,而且抑制银行竞争对风险承担的影响;银行流动性创造能力强化银行竞争对风险承担的促进;银行资本决策强化全国范围内经营银行竞争对风险承担的影响。实证结果对于银行经营与银行规制政策的设计有意义。

渗流对潮沟沟壁崩塌影响的三维物理模型试验研究

潮沟在海岸动力作用下因沟壁崩塌而频繁地迁移摆动,显著影响潮滩-潮沟系统的稳定性。现有研究多关注涨潮时期潮沟内部的水流冲刷,落潮期间的渗流侵蚀过程却少有涉及,亟需研究渗流对潮沟沟壁稳定性的影响机制。本研究通过物理模型试验探究渗流对潮沟沟壁崩塌的影响,从沟壁崩塌类型、沟壁线变化过程和沟壁后退速率3个方面开展分析。研究结果表明:沟壁破坏类型与渗流水头相关,渗流水头的增加导致破坏类型由悬臂破坏转变为张拉破坏;沟壁后退速率与渗流水头之间存在正相关关系。本研究揭示了渗流作用下潮沟沟壁崩塌的力学机理,阐明了落潮不同阶段沟壁的崩塌过程,对研究潮沟演变有重要意义。

基于滤波器组多载波交错梳状谱的雷达通信一体化信号技术

雷达通信一体化是在实现无线通信的同时实现目标探测,以减小电磁干扰,提高频谱利用率。信号设计是雷达通信一体化技术实现的关键。由于常见的基于正交频分复用(OFDM)的雷达通信一体化信号存在频偏敏感和带外辐射过高的问题,不适用于高动态应用场景。考虑到滤波器组多载波(FBMC)信号具有高多普勒容限和低带外泄露的优点,该文在FBMC框架下,通过优化雷达通信子载波时频位置,提出了一种FBMC梳状谱雷达通信一体化信号设计方法。由于FBMC信号载波间与符号间存在固有干扰,因此信道估计不准确且不适应快时变信道,因此该文设计了一种交错梳状辅助导频结构,消除固有干扰的同时实现信道跟踪。此外,一体化信号中雷达复信号会对通信信号引入实干扰,该文提出了一种基于干扰利用的实干扰补偿算法,将实干扰用于通信信号还原。仿真结果表明,在快时变信道下,该文所设计的雷达通信一体化信号在进行高数据率传输过程中具有较低的误码率,且具有较好的雷达探测性能。

数字金融如何影响货币政策信贷传导效果?——基于银行贷款渠道的分析

作为创新型金融业务模式,数字金融在改变传统金融服务模式的同时,会影响货币政策信贷传导机制和效果。文章立足于商业银行在信贷传导机制中的中介作用,基于商业银行和A股上市公司的面板数据,考察数字金融发展对货币政策银行贷款渠道传导效果的影响。研究发现:数字金融发展减弱了货币政策银行贷款渠道的传导效果;上述减弱作用在资产规模较小、流动性水平较低以及城商行和农商行中更为显著;具体而言,数字金融主要是通过挤压银行存款和降低企业信贷融资占比进而弱化了银行贷款渠道的传导效果。