An improved image enhancement approach via nonsubsampled contourlet transform is proposed in this article. We constructed a geometric image transform by combining nonsubsampled directional filter banks and a nonlinear mapping function. Here, the NSCT of the input image is first decomposed for L-levels and its noise standard deviation is estimated. It is followed by calculating the noise variance and threshold calculation, and computing the magnitude of the corresponding coefficients in all directional subbands. Then, the nonlinear mapping function is used to (...) modify the NSCT coefficients for each directional subband, which keeps the coefficients of strong edges, amplifies the coefficients of weak edges, and zeros the noise coefficients. Finally, the enhanced image is reconstructed from the modified NSCT coefficients. Three experiments are carried out respectively on images from subjective vision quality and objective evaluation measures. The first experiment is the algorithm performed on images. The subsequent experiments are the information entropy and spatial frequency. The experimental results demonstrate that the proposed method can gain better performance in enhancing the low-contrast parts of an image while keeping its clear edges. (shrink)

As an efficient approach, the trust policy is implemented to defend against insider attacks in complex networks. However, the imperfection of trust relationships directly hinders the effort to quantitatively calculate trust value, especially in choosing a cooperative partner. Fortunately, the game theory is gradually concerned with addressing the above issue to further enhance security. In this paper, the game theory and the trust policy are reviewed briefly. Then, the research roadmap on game-based trust in complex networks is discussed and analysed (...) deeply. Furthermore, some research directions in the near future are given. It is worth mentioning that our contributions not only describe the evolution of the game-based trust clearly but also suggest the trust mechanism based on the bounded rational game more suitable to uncertain information. (shrink)

本书从市场失败出发,越出经济学的范畴,以超越现代性的视角,重新评估并构建了经济伦理学。阐明了道德失败同市场与政府失败构成广义经济学的三大失败,美德机制和良知具有超越一般价值取向和规范的意义。.

The asymmetric distribution of lipids, maintained by flippases/floppases and scramblases, plays a pivotal role in various physiologic processes. Scramblases are proteins that move phospholipids between the leaflets of the lipid bilayer of the cellular membrane in an energy‐independent manner. Recent studies have indicated that viral infection is closely related to cellular lipid distribution. The level and distribution of phosphatidylserine (PtdSer) in cells have been demonstrated to be critical regulators of viral infections. Previous studies have supported that the infection of human (...) immunodeficiency virus (HIV), Zika virus, Ebola virus (EBOV), influenza virus, and dengue fever virus require the externalization of phospholipids mediated by scramblases, which are also involved in the pathogenicity of the pandemic severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2). In this review, we review the relationship of scramblases with viruses and the potential viral effector proteins that might utilize host scramblases. (shrink)

本书用史论结合的方法,从中西方的古代直到近代道德观念和道德学说的发展历史中,揭示了伦理道德学说的发展规律。.

100個故事，帶您進入哲學的深邃思想領域，讓您更深層的了解人生！ 羅馬的哲人西塞羅（Cicero）說：「哲學！人生之導師，至善之良友，罪惡之勁敵，假使沒有你，人生又值得什麼！」 本書將帶您步入100個哲學故事，在使您在領略哲學理論的同時，又能真切體味到哲學的韻味。從而使您享受到思想之光的照耀。 書中的每個故事都饒有趣味，極具經典性和代表性，它們濃縮了哲學的精髓。閱讀這些故事，挖掘、汲取含蘊於其中的哲理智慧，不僅可以對哲學的歷史、思想和人物有更真切的理解，還能獲得啟迪，對事業、生活和感情有所幫 助。 本書透過頗具文化韻味的設計、豐富的圖片、簡約大方的版式等各種要素的有機配合，營造了一個輕鬆有趣且充滿文化氣息的閱讀空間，使讀者能感受到文化與藝術的雙重薰陶，獲得一種難以言傳的美妙感受。 無論您是疲倦時，還是休閒時，打開本書，它都將給您最溫馨的感受、智慧的啟迪，在撫慰您精神的同時，讓您的思想得當進一步的昇華。.

One way to evaluate and compare rival but potentially incompatible theories that account for the same set of observations is coherence. In this paper we take the quantitative notion of theory coherence as proposed by [Kwok, et.al. 98] and broaden its foundations. The generalisation will give a measure of the efficacy of a sub–theory as against single theory components. This also gives rise to notions of dependencies and couplings to account for how theory components interact with each other. Secondly we (...) wish to capture the fact that not all components within a theory are of equal importance. To do this we assign weights to theory components. This framework is applied to game theory and the performance of a coherentist player is investigated within the iterated Prisoner’s Dilemma. (shrink)

《五百年来王阳明》结合两千年来中华文明发展史，生动讲述了王阳明立功、立德、立言的传奇人生，讲述了王阳明在千磨万击的人生困厄中创建心学的历程，系统梳理了知行合一大智慧，并展开了卓有见地的阐发。.

本书以佛教各系统之关系和特色为线索,提要鉤玄地把牟先生对它们的理解疏理出来,以展示牟先生对佛家义理的诠释.