The Gaussian mixture filter can solve the non-Gaussian problem of target tracking in complex environment by the multimode approximation method, but the weights of the Gaussian component of the conventional Gaussian mixture filter are only updated with the arrival of the measurement value in the measurement update stage. When the nonlinear degree of the system is high or the measurement value is missing, the weight of the Gauss component remains unchanged, and the probability density function of the system state cannot (...) be accurately approximated. To solve this problem, this paper proposes an algorithm to update adaptive weights for the Gaussian components of a Gaussian mixture cubature Kalman filter in the time update stage. The proposed method approximates the non-Gaussian noise by splitting the system state, process noise, and observation noise into several Gaussian components and updates the weight of the Gaussian components in the time update stage. The method contributes to obtaining a better approximation of the posterior probability density function, which is constrained by the substantial uncertainty associated with the measurements or ambiguity in the model. The estimation accuracy of the proposed algorithm was analyzed using a Taylor expansion. A series of extensive trials was performed to assess the estimation precision corresponding to various algorithms. The results based on the data pertaining to the lake trial of an unmanned underwater vehicle demonstrated the superiority of the proposed algorithm in terms of its better accuracy and stability compared to those of conventional tracking algorithms, along with the associated reasonable computational time that could satisfy real-time tracking requirements. (shrink)
Deep learning-based visual odometry systems have shown promising performance compared with geometric-based visual odometry systems. In this paper, we propose a new framework of deep neural network, named Deep Siamese convolutional neural network, and design a DL-based monocular VO relying on DSCNN. The proposed DSCNN-VO not only considers positive order information of image sequence but also focuses on the reverse order information. It employs supervised data-driven training without relying on any modules in traditional visual odometry algorithm to make the DSCNN (...) to learn the geometry information between consecutive images and estimate a six-DoF pose and recover trajectory using a monocular camera. After the DSCNN is trained, the output of DSCNN-VO is a relative pose. Then, trajectory is recovered by translating the relative pose to the absolute pose. Finally, compared with other DL-based VO systems, we demonstrate the proposed DSCNN-VO achieve a more accurate performance in terms of pose estimation and trajectory recovering through experiments. Meanwhile, we discuss the loss function of DSCNN and find a best scale factor to balance the translation error and rotation error. (shrink)
The Confucian doctrine of _tianxia_ outlines a unitary worldview that cherishes global justice and transcends social, geographic, and political divides. For contemporary scholars, it has held myriad meanings, from the articulation of a cultural imaginary and political strategy to a moralistic commitment and a cosmological vision. The contributors to _Chinese Visions of World Order_ examine the evolution of tianxia's meaning and practice in the Han dynasty and its mutations in modern times. They attend to its varied interpretations, its relation to (...) realpolitik, and its revival in twenty-first-century China. They also investigate tianxia's birth in antiquity and its role in empire building, invoke its cultural universalism as a new global imagination for the contemporary world, analyze its resonance and affinity with cosmopolitanism in East-West cultural relations, discover its persistence in China's socialist internationalism and third world agenda, and critique its deployment as an official state ideology. In so doing, they demonstrate how China draws on its past to further its own alternative vision of the current international system. Contributors. Daniel A. Bell, Chishen Chang, Kuan-Hsing Chen, Prasenjit Duara, Hsieh Mei-yu, Haiyan Lee, Mark Edward Lewis, Lin Chun, Viren Murthy, Lisa Rofel, Ban Wang, Wang Hui, Yiqun Zhou. (shrink)
Through a comparative analysis of diverse texts and contexts, this book offers a cultural history of the interplay between the aesthetic and the political in the formation of personal and collective identity that crystallizes into the Chinese aesthetic of the sublime. It describes how various kinds of politics are aestheticized and how aesthetic manifestations are bound up with prevalent ideologies and politics. In this book, politics refers to various projects for fashioning a viable self, a workable personal and collective identity (...) in the crisis-ridden history of modern China. These projects include imagining a political subject adapted to the modern nation-state, mobilizing revolutionary masses as subjects of the Communist state, sustaining a unified self despite the challenges to traditional culture, erecting the sublime figure of the revolutionary hero, and, finally, debunking the grand images of the hero and history in post-Mao culture. Throughout, the author seeks to delineate the ways the political masquerades as aesthetic discourse and aesthetic experience. Covering a wide range of material from fiction, poetry, aesthetics, and political discourse to memoirs, film, and historical documents, the book reconsiders a number of prominent cultural figures, including Wang Guowei, Cai Yuanpei, Lu Xun, Eileen Chang, Mao Zedong, Zhu Guangqian, and Li Zehou. It also analyzes such important cultural features and events as Western influences on the formation of modern Chinese aesthetic discourse, modernist writings, Revolutionary Cinema, the Cultural Revolution, and New Wave Fiction. An East-West comparative approach informs the analysis, which engages in dialogue with Kant, Hegel, Freud, Marx, and Walter Benjamin, as well as Terry Eagleton and other contemporary critics. The author's interdisciplinary method, which emphasizes the interaction among text, context, and the psyche, both presents new materials and illuminates familiar texts and phenomena from the perspective of the political-aesthetic nexus. (shrink)
Di er ci Qimeng (The second Enlightenment), by Wang Zhihe and Fan Meijun, is a timely book in Chinese about constructing a philosophical and practical way to contend with China's postmodernization. It combines Whitehead's process philosophy with a focus on Chinese modernity in order to map out a desirable postmodern society. It addresses the problem on several dimensions from policy making to basic value systems. The range of themes can be seen from the topics of the book's twelve chapters: (...) (1) Reverence for Land—Toward a Constructive Postmodern Agriculture; (2) Becoming Fully Human—Toward a Postmodern Organic Education; (3) Survival of the Harmonious-Toward a Constructive Postmodern Harmonious Culture; (4) Beauty .. (shrink)
A fundamental way in which human thought has developed has been constantly to explain the earliest "classics" that are the source of that thought. All in all, the number of such classics is not very high, their explanations are past counting. Moreover, they are constantly increasing, giving rise to an explanatory chain deriving from the classics. In the development of Chinese philosophy, this aspect is particularly noticeable, so that one can describe Chinese philosophy as a continual explanation of the classics. (...) This holds for both Confucianism and Daoism. The main classics of Daoism are the Laozi and the Zhuangzi. These two works have been constantly reread and reinterpreted throughout history. From the late nineteenth century onward, Chinese philosophy came into closer contact with Western philosophy. Foreign concepts were brought in to provide philosophers with new "insight." Some thinkers applied this new insight or these foreign concepts to the Daoist classics. In this way, they brought a new explanation of the Daoist classics and enriched the ways of interpreting the texts.1 Paving the way in this direction were Yan Fu. Zhang Taiyan, Liang Qichao, Wang Guowei, and Hu Shi. (shrink)
The activity of synsedimentary faults plays an important role in controlling the distribution of sand bodies in basins and furthermore the porosity and permeability of reservoirs. We have used fault interpretation, the method of image and granularity size analysis, and the seismic pumping effect to investigate the control of the activity of the Kongdong fault on the development degree of the dissolution pores and grain size, further studying the controlling mechanism of the activity of synsedimentary faults on reservoir quality. The (...) results showed that the slip rate of synsedimentary faults is one of the main factors in controlling reservoir quality. The slip rate controls the accommodation space and hydrodynamic conditions and it furthermore controls the grain size. The higher the slip rate, the bigger the grain size in the downthrow wall of synsedimentary faults; the seismic pump produced by synsedimentary faults activity also controls the development degree of dissolution pores. The development degree of dissolution pores in the downthrown wall of synsedimentary faults is greater than that in the upthrown wall. Dissolution pores are more developed in areas with a large slip rate of synsedimentary faults. Porosity increases gradually with the increase of plane porosity of dissolution pores, whereas the changes of permeability are not obvious. (shrink)
Security properties naturally combine temporal aspects of protocols with aspects of knowledge of the agents. Since BAN-logic, there have been several initiatives and attempts to incorpórate epistemics into the analysis of security protocols. In this paper, we give an overview of work in the field and present it in a unified perspective, with comparisons on technical subtleties that have been employed in different approaches. Also, we study to which degree the use of epistemics is essential for the analysis of security (...) protocols. We look for formal conditions under which knowledge modalities can bring extra expressive power to pure temporal languages. On the other hand, we discuss the cost of the epistemic operators in terms of model checking complexity. (shrink)
Hao Wang was one of the few confidants of the great mathematician and logician Kurt Gödel. _A Logical Journey_ is a continuation of Wang's _Reflections on Gödel_ and also elaborates on discussions contained in _From Mathematics to Philosophy_. A decade in preparation, it contains important and unfamiliar insights into Gödel's views on a wide range of issues, from Platonism and the nature of logic, to minds and machines, the existence of God, and positivism and phenomenology. The impact of (...) Gödel's theorem on twentieth-century thought is on par with that of Einstein's theory of relativity, Heisenberg's uncertainty principle, or Keynesian economics. These previously unpublished intimate and informal conversations, however, bring to light and amplify Gödel's other major contributions to logic and philosophy. They reveal that there is much more in Gödel's philosophy of mathematics than is commonly believed, and more in his philosophy than his philosophy of mathematics. Wang writes that "it is even possible that his quite informal and loosely structured conversations with me, which I am freely using in this book, will turn out to be the fullest existing expression of the diverse components of his inadequately articulated general philosophy." The first two chapters are devoted to Gödel's life and mental development. In the chapters that follow, Wang illustrates the quest for overarching solutions and grand unifications of knowledge and action in Gödel's written speculations on God and an afterlife. He gives the background and a chronological summary of the conversations, considers Gödel's comments on philosophies and philosophers, and his attempt to demonstrate the superiority of the mind's power over brains and machines. Three chapters are tied together by what Wang perceives to be Gödel's governing ideal of philosophy: an exact theory in which mathematics and Newtonian physics serve as a model for philosophy or metaphysics. Finally, in an epilog Wang sketches his own approach to philosophy in contrast to his interpretation of Gödel's outlook. (shrink)
In this first extended treatment of his life and work, Hao Wang, who was in close contact with Godel in his last years, brings out the full subtlety of Godel's ideas and their connection with grand themes in the history of mathematics and ...
Connie Wang ABSTRACT: Accounts of deep disagreements can generally be categorized as optimistic or pessimistic. Pessimistic interpretations insist that the depth of deep disagreements precludes the possibility of rational resolution altogether, while optimistic variations maintain the contrary. Despite both approaches’ respective positions, they nevertheless often, either explicitly or implicitly, agree on the underlying assumption that...
This cogent and knowledgeable critique of the tradition of modern analytic philosophy focuses on the work of its central figures -- Russell, Carnap, and Quine -- and finds it wanting. In its place, Hao Wang unfolds his own original view of what philosophy could and should be. The base of any serious philosophy, he contends, should take as its point of departure the actual state of human knowledge. He explains the relation of this new tradition to mathematical logic and (...) reveals the crucial transitions and mistakes in mainstream Anglo-American philosophy that make a new approach so compelling.Equally at home in philosophy and mathematics, Wang is uniquely qualified to take on the task of critically examining modern philosophy. He carefully traces the path of ideas from Russell and Wittgenstein through the Vienna Circle to modern British and American philosophy, and makes use of his familiarity with the profound thought of Kurt GÃ¶del with whom he has had numerous discussions. He also presents the broader significance of Russell's philosophy, provides a comprehensive and unified treatment of Quine's work in logic and in philosophy, and delineates what is common between Carnap and Quine. (shrink)
In the summer of 1997 one could scarcely enter a bookstore in Beijing without encountering Wang Xiaobo's pensive and defiant look on the cover of dozens of books displayed at the entrance. Wang had suddenly died in the spring of that year at the age of forty-five. Born in Beijing in 1952 to a family of intellectuals, he remained attached to China's capital despite periods of separation, such as during the Cultural Revolution, when he was sent to Yunnan (...) to "learn from the peasants" and taught in a "people-run-school" in Shandong, and also during the 1980s, when he studied in the United States . Wang always returned to Beijing, in the late 1970s to study economy and business at the People's University and in the late 1980s to teach there. After retiring in 1993, he devoted his time to writing: poetry, novels, essays, non-fiction, and a movie script. (shrink)
ntroduction Since China’s gradualist reform started in the early 1980s, its governance record has been relatively successful. Despite a large number of severe challenges, the government in Beijing has managed outstanding economic performance and large-scale social transformation (Naughton 2007). Overall, the regime seems to enjoy relatively high levels of public support (Gilley 2006; Wang 2009), and a reform and state-building process controlled by the ruling Chinese Communist Party looks set to continue for the next ten to 20 years. One (...) key element of the Chinese political or governing system is management of its Party and government officials, or “cadres” in its own terminology. We argue that the Party-state’s personnel management features a meritocratic system that has so far largely evaded scholarly attention. This system retains strong influences from the Confucian scholar-official tradition of China’s imperial past, as well as the Leninist “vanguard party” tradition that was established in the revolutionary and Maoist eras. In recent years, however, this system has paid increasing attention to nurturing managerial competence for the purpose of administering a modern economy and a modern society. How the Party attempts to strike a balance between political loyalty and professional competence is the focus of this study. We will examine several aspects of the Chinese cadre management system. These include the formal rules, institutions, and actual practices regarding (1) recruitment, (2) development, and (3) promotion of officials. From this analysis we will understand how political loyalty and professional competence are defined and measured in the Party’s personnel regime, and how a balance is sought between the two. We will also look at the changes that are taking place in the relative importance, or weights, of these two criteria as the Party-state tries to build a modern governance machine. We find that while political reliability and commitment still feature prominently when the Party staffs the state and party bodies, rapid economic development and social changes have amplified the need for capable and competent managers and administrators, in order to deliver successful governance. Whereas in the past political loyalty played a crucial role for officials’ success within the state ranks, today professional competence has become more central. Whether this trend will continue, to a future state in which political loyalty becomes almost irrelevant, will be discussed toward the end of the chapter. (shrink)