Road link speed is one of the important indicators for traffic states. In order to incorporate the spatiotemporal dynamics and correlation characteristics of road links into speed prediction, this paper proposes a method based on LDA and GCN. First, we construct a trajectory dataset from map-matched GPS location data of taxis. Then, we use the LDA algorithm to extract the semantic function vectors of urban zones and quantify the spatial dynamic characteristics of road links based on taxi trajectories. Finally, we (...) add semantic function vectors to the dataset and train a graph convolutional network to learn the spatial and temporal dependencies of road links. The learned model is used to predict the future speed of road links. The proposed method is compared with six baseline models on the same dataset generated by GPS equipped on taxis in Shenzhen, China, and the results show that our method has better prediction performance when semantic zoning information is added. Both composite and single-valued semantic zoning information can improve the performance of graph convolutional networks by 6.46% and 8.35%, respectively, while the baseline machine learning models work only for single-valued semantic zoning information on the experimental dataset. (shrink)

In this paper, we investigate the numerical solution of the coupled fractional massive Thirring equation with the aid of He’s fractional complex transform. This study plays a significant aspect in the field of quantum physics, weakly nonlinear thrilling waves, and nonlinear optics. The main advantage of FCT is that it converts the fractional differential equation into its traditional parts and is also capable to handle the fractional order, whereas the homotopy perturbation method is employed to tackle the nonlinear terms in (...) the coupled fractional massive Thirring equation. An example is illustrated to present the efficiency and validity of the two-scale theory. The solutions are obtained in the form of series with simple and easy computations which confirm that the present approach is good in agreement and is easy to implement for such type of complex systems in science and engineering. (shrink)

本书阐述了清朝早期的主要学术氛围以及当时清朝政府统治下的政治、文化特色. 黄教授生动描述了本书中心人物李绂与其侍奉过的三代帝王--康熙、雍正、乾隆. 李绂出身贫苦, 考中状元, 成为一名杰出的官方学者, 并创作了数部重要哲学论著. 他还曾卷入如朝廷与少数民族之间复杂的政治纠纷中. 李绂与中国历史上三位重要帝王之间的复杂关系导致了他屡遭贬黜, 甚至判处死刑, 只是在临刑前才得以幸免.

Machine learning algorithms bring out an under-appreciated puzzle of discrimination, namely figuring out when a decision made on the basis of a factor correlated with race is a decision made on the basis of race. I argue that prevailing approaches, which are based on identifying and then distinguishing among causal effects of race, in their metaphysical timidity, fail to get off the ground. I suggest, instead, that adopting a constructivist theory of race answers this puzzle in a principled manner. On (...) what I call a “thick constructivist” account of race, to be raced is to be socially positioned in the way indicated by a certain set of statistical regularities on the basis of particular phenotypical traits. A thick constructivist sees that acting on the basis of correlations that constitute race qua social position just is acting on the basis of race, because races just are social positions that subject their member individuals to a particular matrix of social relations that define the raced position. This conclusion has considerable ramifications for our understanding of discrimination, algorithms and beyond. (shrink)

University students having high entrepreneurial intention while not transferring into actual entrepreneurial behavior is a contradictory issue in need of in-depth research. To explore the successive development mechanism of the entrepreneurial process, this study constructed a moderated mediation model to examine whether entrepreneurial commitment from three dimensions mediated the relationship between entrepreneurial intention and behavior, and whether this mediating process was moderated by family support. A survey was conducted among university students from six major universities in south China using the (...) snowball sampling approach. A total of 469 valid responses were obtained. Structural equation modeling was adopted for data analysis. According to the results of the confirmatory factor analysis, it was found that entrepreneurial intention had both direct and indirect positive effects on entrepreneurial behavior, while entrepreneurial commitment worked as the mediator, and family support moderated the relationship between entrepreneurial intention and behavior. Results indicated that entrepreneurial commitment bridged the path from entrepreneurial intention to behavior, and family support created the boundary effect. This finding highlights the importance of guiding students through entrepreneurial commitment toward entrepreneurial behavior, and pays special attention to the crucial role of family support under the national strategy. (shrink)

This research work investigates the association between psychological ownership and innovative behaviour with knowledge hiding and knowledge sharing as mediators. The latter variables are presented as focal antecedents of preventive and promotive psychological ownership. To conduct the study, a theoretical framework was proposed, and data was collected from professionals working in complex management systems in Pakistan. The analysis revealed that knowledge hiding and knowledge sharing can exist simultaneously, and psychological ownership can evoke both positive and negative feelings in employees, which (...) poses a challenge for the management. The results illustrate that psychological ownership has significant associations with knowledge hiding, knowledge sharing, and innovative behaviour. Consequent theoretical contributions and important managerial implications are discussed at the end. (shrink)

本卷收入胡适哲学与文化方面的论文、函牍、讲演、札记80余篇。其中包括实验主义、我们对于西洋近代文明的态度等重要文章。所收文章全面反映了胡适哲学思想、学术主张和对于中西文化的态度,对于了解和研究胡适本人 以及现代中国学术史、现代中国启蒙运动等内容。.

That a symbolic object or work of art participates in what it signifies, as a part within a whole, was a controversial claim discussed with particular intensity in the wake of Immanuel Kant's Critique of Judgment. It informed the aesthetic theories of a constellation of writers in Jena and Weimar around 1800, including Moritz, Goethe, Schelling and Hegel. Yet the twin concepts of symbol and intuition were not only tools of literary and mythological criticism: they were integral even to questions (...) of epistemology and methodology in the fields of theology, metaphysics, history and natural philosophy. The international contributors to this volume further explore how both the explanatory potential and peculiar dissatisfactions of the symbol entered the Anglo-American discourse, focusing on Coleridge, Crabb Robinson and Emerson. Contemporary debates about the claims of symbolic as opposed to allegorical art are kept in view throughout. (shrink)

This chapter examines the influence of German idealism on the works of Soren Kierkegaard. It suggests that Kierkegaard's essential concepts and ideas were influenced by Johann Gottlieb Fichte, Friedrich Wilhelm Joseph Schelling, and Georg Wilhelm Friedrich Hegel, and that his oeuvre can be best understood in the context of classical German philosophy. The chapter also considers Kierkegaard's views about the theology of sin and the problems in his reception of German idealism.

胡適（1891-1962），安徽績溪人。原名嗣穈，後改名胡適，字適之，曾用筆名希彊、臧暉等。新文化運動的奠基人與領袖之一，倡導約翰・杜威的實用主義。1917年回國任教北大，參與編輯《新青年》《努力周報 》《獨立評論》等雜誌，先後擔任中華民國駐美大使、國立北京大學校長、台北「中央研究院」院長等職，著有《中國哲學史大綱》《嘗試集》《胡適文存》等書，並獲諾貝爾文學獎提名。.

Ursachen spielen im Alltag und in der Wissenschaft eine zentrale Rolle. Wir stützen uns auf Ursachenwissen wenn wir Vorhersagen machen, wenn wir Phänomene erklären, wenn wir in die Natur eingreifen und wenn wir Verantwortung zuschreiben. Aber was heißt es, dass etwas die Ursache eines Ereignisses ist? Dieses Buch gibt einen kurzen Überblick über historische Positionen, die auch für heutige Debatten noch relevant sind. Im Hauptteil wird ein systematischer Überblick über die wesentlichen Theorien von Ursachen gegeben: die Regularitätstheorie, die kontrafaktische Theorie, (...) die Prozesstheorie und neuere Formen des Interventionismus. Zwei Fragestellungen spielen bei der Bewertung der verschiedenen Ansätze eine zentrale Rolle: Wie wird erklärt, dass Ursachen ihre Wirkungen,erzwingen‘? Wie wird verständlich gemacht, dass Ursachen Teil einer Welt sein können, die durch die Physik beschrieben wird? Schließlich entwickelt der Verfasser eine neue Variante einer Prozesstheorie, die darauf verzichtet Prozesse physikalisch auszuzeichnen. Die Neuauflage enthält eine deutliche Weiterentwicklung der Position des Verfassers. Zudem wurde der gesamte Text durchgesehen sowie neu erschienene Literatur berücksichtigt. (shrink)