An amplitude controllable hyperjerk system is constructed for chaos producing by introducing a nonlinear factor of memristor. In this case, the amplitude control is realized from a single coefficient in the memristor. The hyperjerk system has a line of equilibria and also shows extreme multistability indicated by the initial value-associated bifurcation diagram. FPGA-based circuit realization is also given for physical verification. Finally, the proposed memristive hyperjerk system is successfully predicted with artificial neural networks for AI based engineering applications.

The transplanted firm is an important force to promote the network evolution and cluster transformation and upgrading of the undertaking firm. From the micro-analytic perspective of firm network, this paper puts forward a theoretical framework with “relationship-network-evolution” as the main line. Taking the refrigeration industry cluster in Minquan County of China as a case study and keeping the firm networks of economic relation, technical cooperation, and social communication firm network in 2009, 2013, and 2017 as the research objects, this paper (...) analyzes the structure and evolution characteristics of regional firm network system, proposes the degree and effect of the local embeddedness of transplanted firms, and discusses their differences between international and interregional transplanted firms. The results revealed that: the local embeddedness of transplanted firms significantly promotes the development of refrigeration industry network. The network power of large-scale transplanted firms in the cluster is increasing day by day, and the network presents a multi-core trend. The local embeddedness of some transplanted firms is not high, and the overall connectivity of the network is not strong. Network intermediary nodes have strong heterogeneity, and the intermediary role of some large transplanted firms in the network needs to be improved. The three network systems have similar structural characteristics, and social capital plays an important role in the local embeddedness of transplanted firms and the development of regional firm network. Compared with international transplanted firms, interregional transplanted firms are more adaptable in terms of local embeddedness. The research results provide a reference for the construction of similar industrial clusters in China and other developing countries. (shrink)

Background: Cognitive impairment is one of the core symptoms of schizophrenia, which is considered to be significantly correlated to prognosis. In recent years, many studies have suggested that metabolic disorders could be related to a higher risk of cognitive defects in a general setting. However, there has been limited evidence on the association between metabolism and cognitive function in patients with early-stage schizophrenia.Methods: In this study, we recruited 172 patients with early-stage schizophrenia. Relevant metabolic parameters were examined and cognitive function (...) was evaluated by using the MATRICS Consensus Cognitive Battery (MCCB) to investigate the relationship between metabolic disorder and cognitive impairment.Results: Generally, the prevalence of cognitive impairment among patients in our study was 84.7% (144/170), which was much higher than that in the general population. Compared with the general Chinese setting, the study population presented a higher proportion of metabolic disturbance. Patients who had metabolic disturbance showed no significant differences on cognitive function compared with the other patients. Correlation analysis showed that metabolic status was significantly correlated with cognitive function as assessed by the cognitive domain scores (p < 0.05), while such association was not found in further multiple regression analysis.Conclusions: Therefore, there may be no association between metabolic disorder and cognitive impairment in patients with early-stage schizophrenia.Trial Registration: Clinicaltrials.gov, NCT02880462. Registered August 26, 2016. (shrink)

Narcissism is considered a generally undesirable trait in the workplace, but is this the whole story? In grandiose narcissism, two dimensions (narcissistic rivalry and narcissistic admiration) are recognized corresponding to self-protecting and self-enhancing regulatory processes separately. Applying the self-regulation theory and the conservation of resources theory, we investigated the distinct outcomes and influencing mechanisms of the two dimensions in an organizational context using multilevel structural equation modeling. Whereas previous literature has found narcissism to be mainly related to negative outcomes in (...) the workplace, our dimensional framework indicates that grandiose narcissism may have a Janus face—i.e., a dark side of unethical behaviors and a light side of prosocial behaviors. From a sample of 646 frontline employees in a Chinese call center, we found that while employee narcissistic rivalry was positively related to customer-directed sabotage through the mediation of emotional exhaustion, narcissistic admiration was positively related to organizational citizenship behavior toward customers (OCB-C) through the mediation of self-perceived status. In addition to the internal self-regulation of these two narcissism dimensions, political skill provides an external self-regulation that moderates the mediating effect of self-perceived status at the first stage—that is, the positive relationship between narcissistic admiration and self-perceived status is stronger when political skill is high rather than low. Our post hoc analyses further reveal that narcissistic rivalry is negatively related to OCB-C through the mediation of self-perceived status. Theoretical contributions and practical implications are discussed. (shrink)

Prior research suggests that ownership structure is associated to corporate social responsibility (CSR) in developed countries. This article examines whether and how ownership structure affects CSR in emerging markets using Chinese firms' social responsibility ranking. Our empirical evidences show that for non-state-owned firms, corporate ownership dispersion is positively associated to CSR. However, for state-owned firms, whose controlling shareholder is the state, this relation is reversed. We attribute the reversed relationship to political interferences and further test this hypothesis by demonstrating that (...) regional economic development is negatively related to CSR for state-owned firms due to decreased political interference in more developed areas. This study is the first to directly examine the relationship between the dispersion of corporate ownership and CSR in emerging markets, and our results depict that it is important to consider ownership type in assessing CSR in emerging market where state ownership is still prevalent such as China. The results also reveal that firm size, profitability, employee power, leverage, and growth opportunity affect CSR in China. (shrink)

Contemporary social reform promotes rapid social transformation, and social practice has a special educational function in higher education. However, research shows weak willingness to participate in social practice among college students. Using the mixed research method, 438 completed questionnaire surveys on perceived environmental support were collected from college students. The influence of perceived environmental support on Chinese college students’ willingness to participate in social practice was analyzed using partial least squares structural equation modeling, and an empirical test was conducted. The (...) findings are as follows: Perceived environmental support significantly impacts students’ participation attitude and perceived behavioral control. Participation attitude and perceived behavioral control significantly influence participation intention, but behavioral norms have no significant influence. Participation intention and perceived behavioral control significantly influence actual behavior. This study provides the theoretical basis of perceived environmental support for future research on social practice participation intention and offers some theoretical guidance for the implementation of social practice in China. (shrink)

Philosophy; Arab countries; political and social conditions.

本书从马克思的原著出发,详尽地展示这位著作家在各个主要理论时期对自然概念的多方面阐述;阐明马克思自然概念的主要理论原则,进而从理论科学及社会工业实践方面论证马克思自然概念的现时代意义。.

Although previous studies showed that women’s menopause-related symptoms varied in different ethnic groups and countries, and were affected by specific social and cultural factors, few studies have been conducted to explore menopause-related symptoms and its influencing factors in middle-aged women among ethnic groups in China. This study aimed to explore the characteristics of menopause-related symptoms and its influencing factors among Mosuo, Yi, and Han women in Yongning area of Yunnan province, China. A cross-cultural design by snowball sampling method was used (...) to recruit 208 women aged 40–60 from Yongning Township, Ninglang County, Yunnan province, China. The 11-item Menopause Rating Scale was used to assess menopause-related symptoms. Compared with Yi and Han women, Mosuo women were accorded the highest family status. Multiple linear regression analyses showed that ethnicity, age, family support, and family decision-making patterns were associated with the severity of menopause-related symptoms. Yi and Han women had more severe menopause-related symptoms than Mosuo women. Among the three groups, women living in “female-dominated” and “co-deliberated” households had significantly lower scores of menopause-related symptoms than those in “male-dominated” households. This study indicates that menopause-related symptoms vary among middle-aged women in different ethnic groups. A higher level of female status in the family and family support may be protective factors of menopause-related symptoms in middle-aged women. (shrink)

本书包括第一章:法的应然与实然概说;第二章:古代中世纪法的应然与实然学说;第三章:近代法的应然与实然学说等内容。.

本书收录了中国学者研究费尔巴哈的文章,并附有费尔巴哈小传、原著版本介绍、费尔巴哈著作及外国学者研究著作的中译本等。.

In school education, teaching-learning interaction is deemed as a core process in the classroom. The fundamental neural basis underlying teaching-learning interaction is proposed to be essential for tuning learning outcomes. However, the neural basis of this process as well as the relationship between the neural dynamics and the learning outcomes are largely unclear. With non-invasive technologies such as fNIRS, hyperscanning techniques have been developed since the last decade and been applied to the field of educational neuroscience for simultaneous multi-brain scanning. (...) Hyperscanning studies suggest that the interpersonal neural synchronization during teaching-learning interaction might be an ideal neural biomarker for predicting learning outcomes. To systematically evaluate such a relationship, this meta-analysis ran on a random-effects model on 16 studies with 23 independent samples. Further moderator analyses were also performed to examine the potential influences of the style, mode, content, and the assessment method of learning outcomes. The random-effects modeling results confirmed a robust positive correlation between INS and learning outcomes. Subsequent analyses revealed that such relationship was mainly affected by both interaction style and mode. Therefore, the present meta-analysis provided a confirmatory neurocognitive foundation for teaching-learning interaction, as well as its relation to the learning outcomes, consolidated future learning and teaching studies in various disciplines including second language education with a firm methodological reference. (shrink)

On the concept of Mokṣa in contemporary Indic philosophy.

本书共分35个问题,其内容包括唯物论、辩证法、认识论和科学方法等重要的哲学理论,同时又涉及数学、宇宙演化史、生物进化论、生物工程、相对论和量子力学等自然科学理论。.

Meeting 5G high bandwidth rates, ultra-low latencies, and high reliabilities requires of network infrastructures that automatically increase/decrease the resources based on their customers’ demand. An autonomous and dynamic management of a 5G network infrastructure represents a challenge, as any solution must account for the radio access network, data plane traffic, wavelength allocation, network slicing, and network functions’ orchestration. Furthermore, federation among administrative domains (ADs) must be considered in the network management. Given the increased dynamicity of 5G networks, artificial intelligence/machine learning (...) (AI/ML) solutions are strong candidates able to learn, and take quick provisioning decisions upon fast changes in network conditions. Therefore, this chapter presents an analysis of the state-of-the-art solutions for 5G networks’ management, where AI/ML solutions are discussed and compared with traditional methods. Additionally, the chapter provides a technology overview of both standards, and existing solutions regarding the 5G network management, and directions toward the integration of AI/ML in 5G networks. (shrink)

本书厘清了何谓历史,何谓历史学,何谓历史学家等基本概念;认为历史的发展有其必然性与偶然性,而人类的历史是由自由人的自由意志作用的结果;历史学家对过去所构思出来的那幅历史图像,乃是他自己思想的外烁.

This paper describes the investigations performed to better understand two-stage rotor speed matching in a contrarotating fan. In addition, this study develops a comprehensive measuring and communication system for a contrarotating fan using ZigBee network. The investigation method is based on three-dimensional RANS simulations; the RANS equations are solved by the numerical method in conjunction with a SST turbulence model. A wireless measurement system using big data method is first designed, and then a comparison is done with experimental measurements to (...) outline the capacity of the numerical method. The results show that when contrarotating fan worked under designed speed, performance of two-stages rotors could not be matched as the designed working condition was deviated. Rotor 1 had huge influences on flow rate characteristics of a contrarotating fan. Rotor 2 was influenced by flow rates significantly. Under large flow rate condition, the power capability of rotor 2 became very weak; under working small flow rate condition, overloading would take place to class II motor. In order to solve the performance mismatch between two stages of CRF under nondesigned working conditions, under small flow rate condition, the priority shall be given to increase of the speed of rotor 1, while the speed of rotor 2 shall be reduced appropriately; under large flow rate condition, the speed of rotor 1 shall be reduced and the speed of rotor 2 shall be increased at the same time. (shrink)

本书是一本阐述自然辩证法的颇具思想独创性的著作。它从根本上突破了自然辩证法的体系结构,对自然观、自然科学观和自然科学方法论提出了一整套原创性的理论,并由此建构起了一个全新的并能体现当代自然科学发展水平 的自然辩证法思想体系。.

本书从逻辑与历史相结合的思维原则出发,对人类历史上几种主要自然观的特征进行了深入的剖析,对“天人合一”的自然观提出了自己的看法,重点展示了产生这些迥异自然观的文化基因。.