欧盟著作权法改革与中国借鉴

2019年欧盟《数字化单一市场版权指令》第17条在制定阶段备受争议,转化过程十分艰难。以荷兰、德国及芬兰为例进行研究,发现：（1）第17条是转化《数字化单一市场版权指令》为国内法的重大障碍之一;（2）转化第17条的法律文本常伴随弹性条款;（3）成员国采用不同方案对第17条进行转化,加剧了欧盟内部的分化;（4）成员国在转化第17条时均不同程度地关注对用户自由的保障。中国应当持续关注《数字化单一市场版权指令》第17条的转化及实施,一方面鼓励权利人与服务提供者加强合作;另一方面重视用户自由的保障,结合自身现状完善版权领域服务提供者的侵权责任规则。     

基于多相滤波的宽带数字化接收机技术

提出了一种多相滤波的宽带数字化接收机的设计技术;讨论了多相滤波的基本原理、设计及FPGA实现,给出了多相滤波的中频数字化接收机的实现方案。计算机仿真结果和现场可编程门阵列仿真结果表明,多相滤波的中频数字化接收机设计方法是可行的,并还可灵活地实现现有专用芯片很难实现的宽带接收技术。     

一种新的自适应卡尔曼滤波算法——ALR算法

本文提出一种新的自适应卡尔曼滤波算法——ALR(Adaptive Least Residual)算法.该算法从经典的卡尔曼滤波出发,使残差达到最小,以残差(residual)样本值代替统计值,再用最陡下降法估计算自适应权增益,最后得到一组自适应滤波公式.通过理论分析和计算机模拟,证明该算法具有算法简单、运算量小等优点,适于在自适应系统辨识、自适应谱估计中作实时处理.     

綜合話音/数据局域网的最佳話音分組长度

本文首先指出了在综合话音、数据通信网中话音信息的特点及对综合业务局域网的特殊要求。其次,对话音分组的总时延作了详细分析。最后推导出了在总时延最小意义下的最佳分组长度计算公式。所得结果与试验报导数据相符。     

移动卫星通信S－ALOHA动态稳定算法

提出了一种移动卫星通信多址访问协议Ｓ－ＡＬＯＨＡ的优化策略──改进的带有信道检测的动态稳定算法，使协议性能在大的动态范围内保持稳定且近似最优。分析了系统各终端处于不同环境以及限制信道输入率的控制策略对性能的影响。通过软件仿真，得出不同情况下信道的性能曲线，并对仿真结果进行了分析。考察了遮蔽对协议能的影响。当输入率较大时，捕获效应能弥补这种影响。     

The Effects of Publication Selection on Test Probabilities and Estimator Distributions

Editorial decisions, based in part on reported hypothesis test results, affect the probabilities associated with those results: the probabilities of Type I and Type II errors thus become different for readers than for authors. The distributions of published parameter estimates are similarly affected. A framework for studying the consequences of test-based information filtering is developed and illustrative examples are provided. The examples indicate that filtering can markedly distort the power functions of hypothesis tests and can induce large estimator biases and increases in mean square error. It is argued that test-based filtering is relevant not only to journal publication but to other forms of information dissemination as well.     

How flat organizations filter: organizational gatekeeping in a networked environment

The development of affordable Internet-based tools and platforms has led to major transformations in organizational dynamics. One key change is the shift of agency from center to ends and the consequent emergence of decentralized (networked) organizations. Focusing on the realm of collective action, we suggest that organizational configurations constructed around participants with greater agency induce organizations to promote new filtering tactics to sort out members who are valuable to the group. Drawing on Signaling Theory, we analyze the filtering behavior that organizations develop in their attempt to cope effectively with a type of tension characteristic of the digital era: The impetus to uphold egalitarian ideals on the one hand and the need to sort out desired participants on the other. Previous studies have explained how boundary work actually works in bureaucratic settings with fairly clear boundaries. This study focused instead on how new patterns of collective participation emerge, and how novel practices related to filtering are distributed in decentralized organizations. The study makes two points with theoretical implications. First, it explains an organization's decision to conduct filtering measures – a decision that on the face of it is counterintuitive since organizations operating in a digital environment can tolerate the enclosure of ‘free riders’. The second point relates to filtering practices. It shows that the emergence of new forms of participation, practices and norm, due to the development of networked media, encourages creativity in the development of specific filtering tactics, with activists considering new tactics for achieving their goals.     

Basil Bernstein: Theory,models and the question of method

The purpose of this article is to address the interpretive synthesis of qualitative research. The article discusses the potential to develop a ‘meta-interpretation’ approach which attempts to maintain an interpretive epistemology congruent with the majority of primary qualitative research. The article identifies and discusses a range of issues in the synthesis of interpretive qualitative research (objectivity, evaluation of studies, sampling, context, interpretation and integrity) that emerge from a review of nine research methods involving synthesis and a broader review of the research synthesis literature. Seven fundamental features of meta-interpretation are outlined and the meta-interpretation procedure is presented. In conclu-sion, the aims of synthesis procedures in general and meta-interpretation in particular are discussed.     

Identification of seasonal arima models using a filtering method

This paper proposes an identification method of ARIMA models for seasonal time series using an intermediary model and a filtering method. This method is found to be useful when conventional methods, such as using sample ACF and PACF, fail to reveal a clear-cut model. This filtering identification method is also found to be particularly effective when a seasonal time series is subjected to calendar variations, moving-holiday effects, and interventions.     

基于前向神经网络的非线性时变系统辨识

提出基于前向神经网络的非线性时变系统辨识方法 ,并用局部化推广卡尔曼滤波算法训练网络 .该算法与全局推广卡尔曼滤波算法相比 ,不需要矩阵求逆运算 ,具有更高的收敛速度和更小存储容量要求 .仿真结果表明本文提出的方法在对非线性时变系统辨识方面取得较好效果