查询词典 schemes

Based on the proposed synchronization schemes, two robustimage watermarking schemes are presented, which embed the watermark indiscrete wavelet transform domain and spatial domain respectively.Besides, the original image is not needed in watermark detection.

针对所提出的两种水印同步方案，分别提出了两种鲁棒图像水印算法，分别在离散小波变换域和空域嵌入水印，且水印提取不需要原始图像。

Insection 4.3, semi-discrete and fully discrete Fourier spectral and pseudo-spectral schemes are constructed. The convergence and stability for the schemes are proved, and the error estimates are obtained.Chapter 5, consider the damped coupled generalized nonlinear wave equations. In section 5.2, by coupled a priori estimates and Galerkin method, prove the existence and uniqueness of the global smooth solution for the periodic initial value problem and obtain the existence of global attractors.

第四章，考虑一类具耗散的广义KdV方程组的周期初值问题，在第二节中证明了整体光滑解的存在性和唯一性，得到整体吸引子；在第三节中构造了半离散和全离散的Fourier谱格式和拟谱格式，在整体光滑解存在的条件下，证明了这些格式解的收敛性，并得到了误差估计。

A LEO and a MEO constellation schemes for China are designed in this chapter with the method. The statistical results have shown that the coverage performance of these two schemes is excellent.

区域性卫星移动通信系统对于发展中国家具有十分重要的意义，特别是对于中国这样幅员辽阔且在广大农村地区缺乏基本通信手段的国家。

In the past 3 years, we have made the following progress:（1）we devised some theoretical schemes performing quantum information processes in encoded subspaces under the condition of general interaction models;（2）considering some practical physical systems,we provided some more efficient schemes performing quantum information processes under actual physical conditions;（3）we studied the stability of the entanglement in 2-qubit system under several decoherent environments;（4）we studied the optimal successful probability of some kinds of nondistortion quantum interrogations in quantum subspaces;（5）we also investigated some fundamental questions in quantum information fields such as quantum channel,quantum teleportation etc.

近三年来，我们在以下方面取得进展：（1）研究了在一般的相互作用下，直接在子空间中实施各种量子信息过程的理论方案；（2）针对于当前的某些实际的物理系统，研究了在现有的实验条件之下，如何高效地实施各种量子信息过程的方法；（3）研究了2-qubit量子系统的纠缠在各种消相干环境下的稳定性问题；（4）研究了量子子空间实施无损伤的量子质询的最佳效率；（5）我们也研究了量子信道、量子隐形传态等量子信息的基础问题。

Implicit schemes are hard to parallelize, while explicit schemes are easy to implement on parallel computer in spite of its strict stability constraints.

隐式格式难以直接在并行机上实施，显式差分格式尽管易于在并行机上实施，但它的稳定性条件苛刻。

This paper bases on frequency-hopped and frequency synthesis theories, and through demonstrating three schemes of frequency synthesis, the paper selects one of these schemes that uses DDS spiriting up PLL and improves on the method according to the practical target and synchronously, the paper analysis the capability of the output signal and the conversion time of the frequency.

本文在对跳频理论及频率合成理论分析的基础上，在讨论三种频率合成方案后，设计完成了一种适于本课题的DDS激励PLL的混合方案，并对频率合成器主要性能中的输出信号的噪声特性和频率转换性能做了研究分析。

This paper expounds the problems existing in tamping machines and the improvements of tamping and pushing schemes, and makes comparison of different schemes.

叙述了捣固机械存在的问题以及捣固推焦方案的改进，并对不同的方案进行了比较。

Due to the complexity of the cell jitter, the NonSynchronous Tining Recovery methods are currently not mature With the emphasis being given to the Class A CBR traffic, this paper analyzes the performance of the queueing delay and cell jitter at the source node and intermediate nodes, and discusses the Source Timing Recovery at the destination node in ATM networks Firstly, this paper presents a description of the cell jitter of CBR traffic, and gives the definitions of two kinds of cell jitter regarding the Source Timing Recovery for CBR traffic Then, by using exact mathematical models and analysis methods, this paper analyzes the impact of the factors, such as the capacity of the queueing buffer, the randomness, the deterministic nature and the correlation in cell arrivals of the background traffic sources, on the queueing delay and cell jitter performance of the CBR traffic through Statistical Multiplexitng To obtain an insight into the power spectral distribution and look for better schemes for the depression and filtering of the cell jitter, within the analyses we succeed deriving the power spectrum of the cell jitter for CBR traffic Hence, not only the power spectral distribution of the cell jitter can in the frequency domain be qualitatively understood, but also can the rms (root-meansquare) value of the cell jitter be quantitatively obtained so as to more accurately measure the amplitude of the jitter In the end-to-end performance analysis of the queueing delay and cell jitter, we propose a kind of quasi-periodic cell stream model to characterize the jittered CBR traffic, and present an initial queueing analysis of the CBR traffic following such a model at a generic intermediate node Additionally, we briefly discuss the buildout/playout and Source Timing Recovery functions of the destination node Finally, regarding the Source Timing Recovery of CBR traffic, this paper systematically discusses several important principles of the cell jitter filtering and depression reported in the literature, introduces several implementation schemes of the Source Timing Recovery e.

由于信元抖动的复杂性，非同步定时恢复方法目前还很不成熟。本文针对A类CBR业务流在ATM网络源节点和中间节点的排队时延和信元抖动性能，以及在目的节点的源定时恢复问题作了较为全面的研究。首先，文中描述了CBR业务流的信元抖动，并具体地给出了两种与CBR业务源定时恢复有关的信元抖动的定义。然后，采用了精确的数学模型和分析方法，有针对性地分析了业务背景中信元到达的纯随机性、确定性和相关性以及排队缓存器容量等因素对CBR业务流经过统计复用后的排队时延和信元抖动性能的影响。为了了解信元抖动的功率频谱分布和寻求更好的抑制和滤除抖动的方法，在性能分析中，我们成功地完成了CBR业务流信元抖动的功率谱分析，使得不但可以从频域定性地认识信元抖动的能量分布特性，而且还可以定量地求出信元抖动的均方根值(rms：root-mean-square)，以更为准确地衡量抖动的大小。在CBR业务流的多节点端-端排队时延和信元抖动性能分析中，我们提出了一种准周期性(quasi-periodic)信元流模型来描述感染了信元抖动的CBR业务流，并基于这一模型进行了CBR业务流中间节点的初步排队分析。

In this paper, a comprehensive survey on mobile multicast arithmetics and schemes is given, the advantages and application range of these arithmetics or schemes are discussed respectively, also the shortcomings and problems existed are anatomized in depth, and then a comprehensive comparison is given.

详细地介绍了现有的主要移动组播算法和协议，讨论了每种算法或协议的适应范围以及优点，比较深入地剖析了其中存在的缺陷和问题，并且对这些移动组播算法和协议进行了综合对比。

In order to find more efficient tweakable enciphering schemes and more implementation methods,we propose generalized tweakable enciphering schemes.

为发现更多高效的可调加密方案以及更多的可调加密方案的实现方法，提出广义可调加密方案。

We will see more and more activist government policies that distinguish economic activities according to the nationality of the actors.

我们将看到越来越多激进的政府政策，这些政策根据企业的国籍来区分经济活动。

If we can prove the independence of an axiomatic system, then we can guarantee the conciseness of this system, ie.

如果能够证明某个一阶谓词系统的独立性，那么就能够保证该系统的建立是精炼的，即没有任何一条公理或推理规则是多余的。