This paper develops an adaptive fixed-time trajectory tracking controller of an underactuated hovercraft with a prescribed performance in the presence of model uncertainties and unknown time-varying environment disturbances. It is the first time that the proposed method is applied to the motion control of the hovercraft. To begin with, based on the hovercraft's four degrees of freedom model, the virtual control laws are designed using an error transforming function and the fixed-time stability theory to guarantee that the position tracking errors (...) are constrained within the prescribed convergence rates and minimum overshoot. In addition, by combining the Lyapunov direct method and the adaptive radial basis function neural network, the actual control laws are designed to ensure that the velocity tracking errors converge to a small region containing zero while handling model uncertainties and external disturbances effectively. Finally, all tracking errors of the closed-loop system are uniformly ultimately bounded and fixed-time convergent. Results from a comparative simulation study verify the effectiveness and advantage of the proposed method. (shrink)

The present study critically evaluates whether school leadership influences student learning homogenously regardless of school contexts. It examined relationships between four principal leadership variables (envisioning, instructional management, promoting professional development, empowerment) and two types of student outcomes (enjoyment in learning science, science achievement,) in different school contexts (in terms of the availability of science resources, quality of science teachers, and school socioeconomic status (SES)). The sample comprised 248,620 students and 9,370 principals in 35 developed countries who participated in the Programme (...) for International Student Assessment (PISA) 2015. Latent profile analysis (LPA) showed that schools operated in three types of school contexts with different levels of science resources, proportion of quality science teachers, and school SES. There were also differences in the pattern of leadership practices across the three types of school contexts. Three-level hierarchical linear modeling (HLM) showed that among the four leadership variables, only instructional management was positively associated with students’ enjoyment of science in schools with less science resources and quality science teachers. Therefore, instructional management had compensatory effects for students in less-endowed schools. In contrast, principal leadership related to envisioning, teacher professional development, and empowerment was not positively related to students’ science learning in all three school contexts. (shrink)

Evidence suggests that perceived school culture is the most powerful predictor of teachers’ work performance. However, studies to date have paid little attention to the potential mechanisms behind this association. On the basis of the job demands–resources model, the present study explored the mediating role of affective empathy and the moderating role of job tenure in the association between perceived school culture and teachers’ work engagement. 647 primary and secondary school teachers completed questionnaires measuring perceived school culture, affective empathy, and (...) work engagement. After gender and educational level were included as covariates, the results showed that perceived school culture positively correlated with teachers’ work engagement, and more importantly, this association was partially mediated by affective empathy. In addition, job tenure significantly moderated the direct association between perceived school culture and work engagement. Specifically, there was a stronger association between perceived school culture and work engagement for teachers with shorter job tenure than those with longer job tenure. The findings suggested the direct effect of perceived school culture on work engagement, and the indirect effect of perceived school culture on work engagement through the mediating role of affective empathy. These findings enrich our understanding of how perceived school culture associates with work engagement, and highlight the moderating role of job tenure in the direct association between perceived school culture and work engagement. (shrink)

Using a cross-modal semantic priming paradigm, both experiments of the present study investigated the link between the mental representations of iconic gestures and words. Two groups of the participants performed a primed lexical decision task where they had to discriminate between visually presented words and nonwords (e.g., flirp). Word targets (e.g., bird) were preceded by video clips depicting either semantically related (e.g., pair of hands flapping) or semantically unrelated (e.g., drawing a square with both hands) gestures. The duration of gestures (...) was on average 3,500 ms in Experiment 1 but only 1,000 ms in Experiment 2. Significant priming effects were observed in both experiments, with faster response latencies for related gesture–word pairs than unrelated pairs. These results are consistent with the idea of interactions between the gestural and lexical representational systems, such that mere exposure to iconic gestures facilitates the recognition of semantically related words. (shrink)

Ben shu jie shao le gong zi zhen, wei yuan, yan fu, kang you wei, tan si tong, liang qi chao, chen tian hua, zhang bing lin deng wan qing si xiang jia de zhe xue si xiang.

Ben shu jie shao le gong zi zhen, wei yuan, yan fu, kang you wei, tan si tong, liang qi chao, chen tian hua, zhang bing lin deng wan qing si xiang jia de zhe xue si xiang.

Better known in his own times than later, Huan T'an (43 BCE-25 CE) was a scholar-official, independent in his thought and unafraid to criticize orthodox currents of his time. A practitioner of the Old Text exegesis of the Classics, he maintained a position on the court during a turbulent time of political crises, uprisings, and civil war, spanning the reigns of four emperors. His principal work, Hsin-lun, differs from other books on political criticism in that it does not deal primarily (...) with history but takes many examples from contemporary social and political life. While belonging to the Old Text group of court officials and scholars, Huan T'an differed radically from them in his stress on direct knowledge, in his range of practical experience, and in his outspoken criticism of popular opinions. He was not a systematic philosopher, but his ideas were influential in the return to a more worldly conception of Confucianism. To translate Huan T'an's writings, one must reconstruct the texts. Timoteus Pokora uses two nineteenth-century fragments as a basis around which to orient quotations from Hsin-lun from sixty-four other sources, primarily encyclopedias and commentaries. Pokora provides notes to give context to these short references and to account for discrepancies between quotations and originals, and he includes a large index to add coherence and points of entry. (shrink)

是東漢哲學家、思想家桓譚的主要論着，但早己亡佚。今存之輯本有《指海》內佚名氏輯本、清孫馮翼輯本、清嚴可均輯本、黃以周輯本，及近人朱謙之輯本，但均有不足。有鑒於此，吳則虞先生於1962年着有新輯本，收錄 二百餘條，以類相從，分為八卷，並添加附編，匯涵桓譚佚文、存疑、訂訛之文；記載桓譚事跡、著述、評論之文。 桓譚，后漢時人，官至給事中。博學多識，破讖緯迷妄，去虛妄偽飾，先於王充、張衡，具有唯物啟蒙學者之學識，是漢時哲學思想家。《新諭》是桓譚主要論着，但早已亡佚。據歷史記載，明有二卷本，清有孫之騌輯本，皆不 傳。另有《指海》內佚名氏輯本、清孫馮翼輯本、清嚴可均輯本、黃以周輯本及近人朱謙之輯本。從今日的學術、校勘、編排諸方面來看，諸本均有不足：或短椾零篇，漫無倫紀；或望文歸屬，強系篇名；或條目重復，內容雜陳 迭見；或引用刻本，多有遺漏；或雖沿用十七卷篇目之名稱，但其條目已不能再顯現原書各篇的思想內容。有鑒於此，吳則虞先生於一九六二年着有新輯本，收錄二百余條，以類相從，分為八卷，並添加附編，匯涵桓譚佚文、存 疑、訂訛之文；記載桓譚事跡、著述、評論之文；最后殿以輯校引用書目及版本之詳目，以便於讀者查閱與研究。此書成為目前桓譚《新論》集大成之著作。.

This study chooses Chinese athletes as the research object and constructs the overall network of its social support network and discussion network. From the micro-, meso-, and macrolevels of the social network structure, the structure and characteristics of the athlete’s overall social network are analyzed. Through research, we found that there is embeddedness, that is, the relevance, between society support networks, between society discussion networks, and between society support networks and society discussion networks. At the same time, in the athletes’ (...) social support network and social discussion network, some athletes have no contact with other players; they have no “power” in the group as well, so it is difficult to obtain network resources. We also found that there are small-world characteristics in the social network of Chinese professional athletes. The above findings will provide a deeper understanding of the peculiarities of athlete groups and have certain practical significance for improving athletes’ daily training and life management conditions. (shrink)

中國哲學的特質，是向著超越界開放的人文主義， 此超越界或名為帝，或名為天，或名為道。 不同名稱顯示此種人文主義的開放性與創造性。 這樣的超越界總是伴同一個人的終極關懷而「呈現」出來， 此一呈現隨著古代歷史的演變而展示豐富多彩的面貌。 本書從《詩經》、《書經》、《左傳》、《國語》等書， 以及孔子、孟子、荀子、老子、莊子等人所論述的天論概念， 闡發幽微， 期使中國古人的心靈世界更形清晰，也更為可敬。 傅佩榮教授對中國哲學的興趣與關懷，深受方東美先生的啟發。真正著手認真研究，則是在美國耶魯大學念書時，選讀余英時先生的課開始。方先生以中國哲學的精神與發展「博」之，余先生以歷史文獻的考證與論據「約」之。 經過這一博一約，傅佩榮教授踏入了中國哲學的園地。 傅佩榮教授主張，一般論者多以中國哲學的特質為人文主義或人本主義，這種看法容易引起誤解，譬如以為中國人的視野只是現實的人間世界，即使道德規範與宗教禮儀也不過是考慮「利用厚生」而已，談不上什麼終極關懷與超 越境界。就算勉強肯定了道德主體有其超越依據，也多半以後者為立說之「假設」而已，不必認真看待。這種觀點並不符合先秦重要典籍的明白意旨。如果我們承認先秦典籍（如：詩經、書經、易經、左傳等）與古典儒家及道家 的主要作品，可以代表中國心靈的原型，那麼我們將不難發現：中國哲學的特質並非僅是人文主義，而是開放的人文主義──向著超越界開放。此超越界或名為帝，或名為天，或名為道。不同名稱足以顯示此種人文主義的開放性 與創造性。這樣的超越界絕不是個「假設」，反之，它總是伴同一個人的終極關懷──或為宗教熱忱，或為道德抉擇，或為藝術才情──而「呈現」出來。此一呈現隨著古代歷史的演變而展示豐富多彩的面貌。本書之作，即在闡 發其中幽微，期使中國古人的心靈世界更形清晰，也更為可敬。.

本书为明代处世格言集。作者将儒、释、道三学之学问熟练地融合到现实生活中,体现了人生的大智慧,因而极具实用性。.

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。.

本书主要介绍了先秦、汉代、宋代、近代四个时期传统义利思想的历史发展及中国传统义利思想对日本义利观的影响。.

本书包括:科学技术与伦理学,科学共同体的伦理规范和科学家的社会责任,科技立法与道德教育等八章内容。.

本书以20世纪中国社会变革和思想价值观的演变为背景,研究中国伦理学的学术发展史,介绍不同时期的代表性伦理学学术成果。.

本书系统阐述了法学的一般理论和方法论;对法理学的基本问题、对通贯整个法学体系的法学基本范畴以及法学理论和法制建设的前沿问题进行了解析和探索.