ID	原文	译文
57258	其次，根据网络能效的定义，结合基站能耗模型，推导了与基站密度相关的网络能效的闭合表达式;	Secondly，according to the definition of network EE and base station energy consumption model，the closed expression of network EE related to BS density is derived.
57259	最后，就小基站密度对网络能效的影响进行分析，提出了一种基于牛顿搜索法的小基站密度优化算法，实现网络能效的最大化.	Finally，the influence of the distribution density of the small cells on the network EE is analyzed，and an optimization algorithm of the small cell density based on Newton search method is proposed to maximize the network EE.
57260	仿真结果验证了理论分析的正确性，同时也表明通过优化小基站部署密度完全能够实现网络能效的最大化.	Simulations verify the correctness of the theoretical analysis; and show that the network EE can be maximized through optimizing the deployment density of small cells. Key words: energy efficiency; ultra-d
57261	基于直方图的数字水印算法，因具有较强的抗几何攻击和图像处理攻击能力，一直是信息隐藏领域研究的热点.	The existing histogram-based digital watermarking algorithms，on account of its strong capabili- ty to resist geometric attack and image processing attack，have been the focus and hotspot of data hiding domain.
57262	为了进一步扩大容量和解决比例关系相等问题，提出了多 Bin 多进制直方图数字水印算法概念，引入图像直方图多 Bin 全局调整策略，设计了一种广义的多 Bin 多进制图像数字水印算法.	In order to further expand capacity and resolve the relationship issue of equal proportions，the au- thor initially proposes a concept of multi-Bin and M-ary histogram digital watermarking algorithm by intro- ducing a new multi-Bin adjustment strategy of image histogram，and designs a generalized multi-Bin and M-ary image digital watermarking algorithm.
57263	实验结果表明，设计的算法比现有算法至少提高 2 倍的嵌入容量;同时，在满足载体图像视觉质量的基础上，还能抵抗一定程度的几何攻击和图像处理攻击.	Experiments show that the proposed algorithm achieves at least 2 times embedding capacity than the existing related works，and can resist geometric attacks and im- age processing attacks to some extent on the basis of satisfying the image quality.
57264	在实际通信环境中，用户端及周围的障碍物往往处在移动状态下，因此通信环境常建模为时变信道.	In the actual communication environment，the user terminal and surrounding obstacles are often in a mobile state，so the communication environment is often modeled as a time-varying channel.
57265	为了充分研究当下第 5 代移动通信系统中用户移动性对信道特性的影响，对基于 3GPP TＲ38.901 信道模型的非平稳时变信道模型和平稳时变信道模型进行了仿真分析.	In order to fully study the impact of user mobility on channel characteristics in the current the fifth generation of mobile communications system，a simulation is performed on the non-stationary time-varying channel mod- el and the stationary time-varying channel model based on the 3GPP TＲ38. 901 channel model.
57266	仿真结果包含了 2 种模型的功率延时谱、信道冲激响应、信道时频相关传递函数、时延扩展、角度扩展和时间自相关曲线等.	The sim- ulations include the power delay spectrum，channel impulse response，channel time-frequency correlation transfer function，delay spread，angle spread and time autocorrelation curves of the two models.
57267	充分研究和仿真了 TＲ38.901 提出的 2 种时变模型，并进行了详尽地对比分析.	Two time- varying models proposed by TＲ 38. 901 are fully studied and simulated，and a detailed comparative analy- sis is made.