ID 原文 译文
46386 而在现实环境下，随着各种图像处理软件的流行，用户也越来越多地使用经图像处理后的图片。 However, with the rapid development of image process tools and applications, images after image processing were widely used in real world.
46387 然而，如何利用图像处理来更好地指导隐写还未被系统地研究过。 How to use image process to improve steganography has not been systemically studied.
46388 对此，以空域图像变换为例，提出参数扰动模型，将隐写带来的图像噪声隐藏在因参数微扰而带来的图像像素波动中，主动引入了图像集的失配因素。 Taking spatial image transform for consideration, a parameters’ disturbance model was presented, which could hide the noise taken by steganography in the pixel fluctuation due to the disturbance. Meanwhile, it would introduce cover source mismatch for a steg analyzer.
46389 实验结果表明，在相同的隐写算法下，相较于直接使用原始图像库，隐写分析者在应对参数扰动的情况下的检错率有明显提高，从而显著增强了隐写算法的安全性，也使隐写算法更适用于现实环境。 The experimental results show that, compared with using traditional image database, it can significantly enhance the security of steganography algorithms and accommodative to the real world situation.
46390 下行链路非正交多址接入技术（NOMA）可以有效提高频谱效率和数据速率，已经广泛应用到第 5 代通信技术的研究中。 Non-orthogonal multiple access(NOMA) has been widely used in the research of the fifth generation communication, due to the advantages of improving the spectrum efficiency and data rate.
46391 为了确保用户的服务质量，针对提高边缘小区用户公平性问题，提出一种新的功率分配策略。 In order to guarantee the service of users, a new power allocation strategy was proposed to improve the fairness of users in the cell edge.
46392 根据比例公平方法，在保证每个用户最低数据速率约束下，最大化复用用户中公平性最差的用户的比例公平因子。 According to the proportional fairness method, the goal was to maximize the proportionality fairness factor among the users with the least fairness in multiplexed users.
46393 然后，将此非凸的目标函数转换成凸函数，用 KKT 最优约束条件求出问题的最优解。 The nonconvex objective function was transformed into convex function, and the optimal solution of problem was obtained by KKT optimal constraint condition.
46394 仿真证明，新的基于 NOMA的功率分配方案，系统性能优于传统的正交多址接入（OMA）技术。 Simulation results show that the new NOMA-based power allocation strategy proposed outperforms the traditional orthogonal multiple access technology(OMA).
46395 为建立更高效的移动端对端（mobile to mobile）通信系统，针对城市狭窄街道多入多出系统（MIMO, multiple input multiple output）移动传播环境， To establish scattering models that match realistic street transmission scenarios for more efficient M2M mobile communication systems, existing models mainly focus on single-scattering and double-scattering,while for narrow urban street environment, single-scattering assumption is rather restrictive.