In this paper, a repetitive control scheme of a 2-DOF robotic manipulator based on the improved cubic B-spline curve is proposed. Firstly, a repetitive controller for robotic manipulator is designed, which is composed of an iterative controller and disturbance observer. Then, an improved B-spline optimization scheme is introduced to divide the task of the robotic manipulator into three intervals. A correction function is added to each interval of cubic spline interpolation. Finally, a variety of cases are designed and simulated by (...) MATLAB. The experimental results show that, compared with the conventional B-spline, the improved B-spline has better performance in tracking accuracy and smoothness of motion trajectory. By changing the mechanism of the manipulator, the cases of different weights and lengths are designed. The experimental results in these cases show that the proposed scheme can be applied to most of the 2-DOF robotic manipulator control systems. (shrink)

While the conversations surrounding moral cultivation in Confucianism often focus on the debate regarding the starting point of moral learning (and corresponding features of the learning process) that is inspired by the disagreements between the _Mengzi_ 孟子 and the _Xunzi_ 荀子, there is another group of scholarship on moral cultivation which tends to the experiential qualities felt by the learning agents. This essay participates in the latter group of scholarship. The majority of discussions regarding the learning experience center around mental (...) states such as _an_ 安 (tranquility or equanimity) and _le_ 樂 (happiness, joy, or pleasure) of a special kind. There is, nonetheless, a minor trend that emphasizes the significance of _you_ 憂 (worry or distress). In this essay, I raise attention to the significance of _you_ and argue that in the _Analects_, an indispensable and significant part of Confucian moral cultivation is to learn to worry well, which involves learning to worry broadly about society in general, and to worry deeply about particular individuals standing in important relationship to us_._. (shrink)

This empirical research provides an insight into the management of small talk and its interconnection with interpersonal relations in business negotiations, drawing on the study of its pragmatic allocation, modes and functions in business contexts. By examining ST applications in three interpersonal relationships, the author explores how the interactional patterns of ST are associated with communicators’ interpersonal cognitive processes, demonstrating why ST should not be deemed ‘small’ in task-oriented contexts. The findings yield that ST constructs an integral, and even essential, (...) part of business communication for various social and professional purposes. Its allocations, topic typologies and move systems in negotiations are not randomly positioned, selected and developed, but strategically organized and interpersonally related. As a meaningful, politic and intentional activity, ST reflects business people’s social and professional cognition, relational negotiation and interactive frame, forming communicative primitives that are used in the underlying negotiation, the rapport management in negotiation and cultural disciplines for business people. (shrink)

We give a new characterization of λ-supercompact cardinal κ in terms of -Solovay pairs. We give some applications of -Solovay pairs.

本书从唐君毅先生提出的“中国艺术精神”开始论述,分析了中国艺术精神的多层面向进而深入分析其阐释的意义;继而,本书对徐复观先生深入的研究进行了解读和探索,一直延续到今日学界的研究和探索,并对“中国艺术精 神”在世纪之交时发生的转向给出了结论.

Pluripotent stem cell lines derived from preimplantation mouse embryos have opened opportunities for the study of early mammalian development and generation of genetically uncompromised material for differentiation into specific cell types. Murine embryonic stem cells are highly versatile and can be engineered and introduced into host embryos, transferred to recipient females, and gestated to investigate gene function at multiple levels as well as developmental mechanisms, including lineage segregation and cell competition. In this review, we summarize the biomedical motivation driving the (...) incremental modification to culture regimes and analyses that have advanced stem cell research to its current state. Ongoing investigation into divergent mechanisms of early developmental processes adopted by other species, such as agriculturally beneficial mammals and birds, will continue to enrich knowledge and inform strategies for future in vitro models. (shrink)

We investigate the dynamics of a nonautonomous stochastic SIS epidemic model with nonlinear incidence rate and double epidemic hypothesis. By constructing suitable stochastic Lyapunov functions and using Has’minskii theory, we prove that there exists at least one nontrivial positive periodic solution of the system. Moreover, the sufficient conditions for extinction of the disease are obtained by using the theory of nonautonomous stochastic differential equations. Finally, numerical simulations are utilized to illustrate our theoretical analysis.

Assuming the existence of a measurable cardinal, we define a hierarchy of Ramsey cardinals and a hierarchy of normal filters. We study some combinatorial properties of this hierarchy. We show that this hierarchy is absolute with respect to the Dodd-Jensen core model, extending a result of Mitchell which says that being Ramsey is absolute with respect to the core model.

Pietraszewski proposes four triadic “primitives” for representing social groups. We argue that, despite surface differences, these triads can all be reduced to similar underlying welfare trade-off ratios, which are a better candidate for social group primitives. Welfare trade-off ratios also have limitations, however, and we suggest there are multiple computational strategies by which people recognize and reason about social groups.

As an enabler of environmental sustainability, Green information technology (IT) has become an emerging topic of interest in both academic and business communities. Despite its importance, confusions exist in the content and scope of Green IT practice. The purpose of this paper is to provide an overview of the current state of Green IT practice.,First 14 widely accepted Green IT practice topics were identified from prior research and a taxonomy was developed to categorize them. Using the content analysis method, these (...) topics were examined in the sustainability reports of 30 IT companies in 2014 Fortune 500. A quantity–quality portfolio framework was developed and applied to measure and assess the Green IT practices of the selected samples.,Currently, the Green IT practice is still in its infancy. Both research and practice attention are now focusing on IT’s direct impacts and enabling impacts, while overlooking the systemic impacts, on natural environment. The possible reasons for the current state and the recommendations for future research and practice are provided.,Theoretically, this paper identified 14 widely accepted Green IT practice topics and developed a taxonomy for categorizing them. The taxonomy and topics provide a theoretical basis for future examination on Green IT practice-related issues. Practically, the findings of this paper provide guidelines for Green IT practice and directions for both Green IT developers and adopters in their decision-making. (shrink)

Article aims to explore Augustine's "two cities" theory. First, a brief discussion of the "City of God" writing background and the main structure; Secondly, in both religious and secular aspects of life on the analysis of the "City of God" on the "two cities" of the main points; again, three perspectives of the "two cities" theory of history and ideological background. Although the "two cities" doctrine embodies a form with two points tend to think, but both different from the ontological (...) dualism and the dualism of body and soul, but also avoids the complex social reality for too absolute two points. The focus of this study is Augustine's doctrine of the "Two Cities." The first part treats the background and the structure of the City of God. In the second and the third part, the essay examines both the religious and the temporal aspect of this doctrine. Finally, the historical and intellectual background of the doctrine is discussed. The author argues that even though the doctrine of the "Two Cities" manifests a dualistic tendency in the thought of Augustine, it can hardly be labeled as a dualism. (shrink)

In this paper, we propose the model averaging estimation method for multiplicative error model and construct the corresponding weight choosing criterion based on the Kullback–Leibler divergence with a hyperparameter to avoid the problem of overfitting. The resulting model average estimator is proved to be asymptotically optimal. It is shown that the Kullback–Leibler model averaging estimator asymptotically minimizes the in-sample Kullback–Leibler divergence and improves the forecast accuracy of out-of-sample even under different loss functions. In simulations, we show that the KLMA estimator (...) compares favorably with smooth-AIC estimator, smooth-BIC estimator, and Mallows model averaging estimator, especially when some nonlinear noise is added to the data generation process. The empirical applications in the daily range of S&P500 and price duration of IBM show that the out-of-sample forecasting capacity of the KLMA estimator is better than that of other methods. (shrink)

This is a philosophical book about the idea of human freedom in the context of Chinese philosophy on truth, the good, and beauty. The book shows that there is a coherent and sophisticated philosophical discourse on human freedom throughout the history of Chinese Philosophy in aesthetics, ethics, and epistemology. Feng Qi discusses the development of freedom in light of the Marxist theory of practice. In the history of philosophy, the relation between thought and existence, which is fundamental to philosophy, has (...) stimulated many debates. These debates, though they have assumed diverse forms in Chinese and Western philosophy, have eventually concentrated on three inquiries: the natural world (the objective material world); the human mind; and the concepts, categories, and laws that are representative forms of nature in the human mind and in knowledge. In Chinese philosophy, the three inquiries are summarized using three notions: qi (气 breath, spirit), xin (心 heart), dao (道 the Way). What relationship do the three notions have with each other? This book explores the way to human freedom through the divergent paths in Chinese philosophy. This book’s investigation of human activities brings the typical Chinese philosophical discourse from the cosmological realm into the realm of human beings as individuals. In this regard, the three inquiries can be described as being about real life, ideals, and individuals. (shrink)

本书以“美是有价值的乐感对象”为核心观点，以本质论、现象论、美感论为基本构架，分析论述了美的语义、美的范畴、美的原因、美的规律、美的特征与美的形态、美的领域、美的风格等，构建起一个全新的“乐感美学”理 论体系。.