In this paper, using the Guichardet space technique, the relationship between Fermionquantum stochastic calculus and non-causal calculus in Segal space L^2(H) is discussed, and ananticipating quantum stochastic calcul...In this paper, using the Guichardet space technique, the relationship between Fermionquantum stochastic calculus and non-causal calculus in Segal space L^2(H) is discussed, and ananticipating quantum stochastic calculus is naturally given.展开更多
Reversible watermarking technique enables to extract embedded information without any loss of the host signal. For the reduction of the embedding distortion, a desirable reversible watermarking approach should exploit...Reversible watermarking technique enables to extract embedded information without any loss of the host signal. For the reduction of the embedding distortion, a desirable reversible watermarking approach should exploit efficient prediction way to generate prediction errors with a smaller magnitude for expansion embedding. In this paper, we present a reversible audio watermarking scheme based on a new non-causal prediction method and embedding strategy. The proposed non-causal prediction method provides non-integer prediction errors and the proposed expansion embedding strategy can proceed them for a lower embedding distortion. Experimental results have shown that the proposed reversible technique has a lower embedding distortion for the same embedding payload in comparison with the existing state-of-the-art works.展开更多
The origin of the universe?The origin of free will?The origin of space?Or simply the appearance of something out of nothing,with no causal before,likes a probability that transforms into an unpredictable particle actu...The origin of the universe?The origin of free will?The origin of space?Or simply the appearance of something out of nothing,with no causal before,likes a probability that transforms into an unpredictable particle actuality in quantum physics.In short,does better explanation for such questions await us?Or are we hamstrung by our tendency for“cause-and-effect”explanations or“something vs.nothing”ways of forcing the options?This essay explores the notion of beginnings-that is,the possibility of something from nothing.It begins by clarifying how the meaning of such terms is being intended,for example the question of whether the moon if no one sees it qualifies as a nothing,the question of an uncaused something or an effect minus an antecedent of any kind.In short,what does a something-from-nothing entail?And what is a something in the first place,as Heidegger asks in his essay,“What Is a Thing?”Having sketched out notions of“something”and“nothing”,the discussion proceeds to the central question,namely the possibility of a something from nothing.What is something?What is nothing?It may be that we need new categories of understanding for a better answer.This essay suggests such a quest.展开更多
针对无源雷达信号处理中分数延迟直达波及多径杂波不能被完全对消的问题,提出了一种非因果的归一化最小均方(normalized least mean square,NLMS)自适应对消算法。根据采样信号的插值理论,推导出了分数延迟直达波相对于参考信号具有非...针对无源雷达信号处理中分数延迟直达波及多径杂波不能被完全对消的问题,提出了一种非因果的归一化最小均方(normalized least mean square,NLMS)自适应对消算法。根据采样信号的插值理论,推导出了分数延迟直达波相对于参考信号具有非因果系统响应的特点,然后在传统NLMS对消器的基础上,通过增加部分非因果的滤波网络同时实现了最小均方误差(least mean square error,LMSE)准则下的自适应插值和杂波抑制。经过计算机仿真及实测数据验证,该算法相较于目前已有方法能够降低计算复杂度,并在相同条件下获得更高的杂波相消比。展开更多
文摘In this paper, using the Guichardet space technique, the relationship between Fermionquantum stochastic calculus and non-causal calculus in Segal space L^2(H) is discussed, and ananticipating quantum stochastic calculus is naturally given.
基金Supported by the National Natural Science Foundation of China (61272414the Science and Technology Project of Guangzhou Province(2012J4100108)the Jinan University Outstanding Postgraduate Research and Innovation Program, Jinan University Outstanding Undergraduate Scientific Research Innovation Cultivation Project
文摘Reversible watermarking technique enables to extract embedded information without any loss of the host signal. For the reduction of the embedding distortion, a desirable reversible watermarking approach should exploit efficient prediction way to generate prediction errors with a smaller magnitude for expansion embedding. In this paper, we present a reversible audio watermarking scheme based on a new non-causal prediction method and embedding strategy. The proposed non-causal prediction method provides non-integer prediction errors and the proposed expansion embedding strategy can proceed them for a lower embedding distortion. Experimental results have shown that the proposed reversible technique has a lower embedding distortion for the same embedding payload in comparison with the existing state-of-the-art works.
文摘The origin of the universe?The origin of free will?The origin of space?Or simply the appearance of something out of nothing,with no causal before,likes a probability that transforms into an unpredictable particle actuality in quantum physics.In short,does better explanation for such questions await us?Or are we hamstrung by our tendency for“cause-and-effect”explanations or“something vs.nothing”ways of forcing the options?This essay explores the notion of beginnings-that is,the possibility of something from nothing.It begins by clarifying how the meaning of such terms is being intended,for example the question of whether the moon if no one sees it qualifies as a nothing,the question of an uncaused something or an effect minus an antecedent of any kind.In short,what does a something-from-nothing entail?And what is a something in the first place,as Heidegger asks in his essay,“What Is a Thing?”Having sketched out notions of“something”and“nothing”,the discussion proceeds to the central question,namely the possibility of a something from nothing.What is something?What is nothing?It may be that we need new categories of understanding for a better answer.This essay suggests such a quest.
文摘针对无源雷达信号处理中分数延迟直达波及多径杂波不能被完全对消的问题,提出了一种非因果的归一化最小均方(normalized least mean square,NLMS)自适应对消算法。根据采样信号的插值理论,推导出了分数延迟直达波相对于参考信号具有非因果系统响应的特点,然后在传统NLMS对消器的基础上,通过增加部分非因果的滤波网络同时实现了最小均方误差(least mean square error,LMSE)准则下的自适应插值和杂波抑制。经过计算机仿真及实测数据验证,该算法相较于目前已有方法能够降低计算复杂度,并在相同条件下获得更高的杂波相消比。
