Using first-principles theory, this work investigated the Cu-doping behavior on the N-vacancy of the C3N monolayer and simulated the adsorption performance of Cu-doped C3N (Cu–C3N) monolayer upon two dissolved gases ( H2 and C2H2). The calculations meant to explore novel candidate for sensing application in the field of electrical engineering evaluating the operation status of the transformers. Our results indicated that the Cu dopant could be stably anchored on the N- vacancy with the Eb of − 3.65 eV and caused a magnetic moment of 1 μB. The Cu–C3N monolayer has stronger performance upon C2H2 adsorption than H2 give the larger Ead, QT and change in electronic behavior. The frontier molecular orbital (FMO) theory indicates that Cu–C3N monolayer has the potential to be applied as a resistance-type sensor for detection of such two gases, while the work function analysis evidences its potential as a field-effect transistor sensor as well. Our work can bring beneficial information for exploration of novel sensing material to be applied in the field of electrical engineering, and provide guidance to explore novel nano-sensors in many fields.

The investment-related initiatives have been included in the FOCAC since its beginning. The investment promotion initiative is consistent, mutually sustainable, and goal-clear; the investment protection initiative relies on the protection from domestic and international law; the investment facilitation initiative becomes more important; the investment dispute resolution initiative proposes a creative new choice. Due to investment-related initiatives, the FDI between China and Africa is growing, the bilateral investment treaties are in progress, the investment facilitation situation is improved, and a new dispute resolution institution appears. The investment-related initiatives of FOCAC achieves great success to date.

The current study develops a pair model considering the intensity of negative emotions and strategic combinations of recovery means and timing under hotel service failure scenarios. The purpose of this paper is to evaluate the performances of these different combinations through customer satisfaction, repurchase intention, and fitting curves between the two under Chinese hotel service scenarios. Previous studies have found that service failures cause economic losses as well as negative emotional responses from customers (Grönroos, 1984; McColl Kennedy and Sparks, 2003). However, customers might display higher satisfaction and purchase intentions when proper service recovery actions are taken instead of when no service failures occur (Smith et al., 1999; McCollough et al., 2000). Concerning the means of service recovery during a service failure, customers in a negative emotional state require specific recovery solutions from the service provider; concerning the timing of service recovery, immediate recovery appears to be an effective way to address customer complaints (Kelley et al., 1993). While, previous research has partially shown that for extremely angry customers, the performance of “as soon as possible” recovery is unsatisfying and may even cause the service recovery to fail (Mattila and Ro, 2008). A 2 (recovery timing: immediate/delayed) × 2 (recovery means: psychological/economic) × 3 (type of service failure: failure in a delivery system/failure in responding to customer needs/improper employee behavior) between-subject experimental design was employed with 456 part-time MBA students in China to examine the relationship between customer satisfaction and repurchase intention under different levels of negative emotion after experienced a service failure. The results suggest that immediate and economic recovery effectively raises the service recovery evaluations from customers with low-intensity negative emotions, whereas delayed and psychological recovery helps customers with high-intensity negative emotions to give higher evaluations. This study sheds light on the role that negative emotions play in the process of service recovery and provides implications for service industry managers, that is the decisions to use economic recovery or psychological recovery are necessitate consider the intensity characteristic of negative emotions, for customers in low-intensity negative emotional states, the immediate and economic recovery strategy is effective, whereas for customers in high-intensity negative emotional states, the delayed and psychological recovery strategy may lead to better outcomes. According to these findings, it is important for managers to train front-line staff to adopt proper recovery strategies to manage service failure when facing consumers with different intensity of negative emotion.

With the rapid development of the global economy, transport safety and security have become the key issues in maritime transportation all over the world. In practical applications, the Automatic Identification System (AIS)-based measurement of similarities between different vessel trajectories plays an important role in improving maritime transportation, e.g., maritime navigation, maritime supervision and management. However, the received AIS datasets are usually composed of a large amount of redundant information which could significantly increase the computational complexity. To deal with this problem, a Douglas-Peucker (DP)-based calculation method is introduced in this paper to accurately compress the spatio-temporal AIS trajectories while preserving the main geometrical structures. Based on the compressed trajectories, it is able to accelerate the Dynamic Time Warping (DTW) algorithm for the measurement of similarities between different vessel trajectories. In particular, the combination of DP and DTW has the capacity of significantly reducing the computational cost and guaranteeing the accuracy of similarity measures. The experimental results have demonstrated the superior performance of the proposed method in terms of computational cost and accuracy of similarity measures.

본 논문에서는 현재 대만이 추진하고 있는 핵심 교육정책에 대해 다루고 있으며, 그 정책은 (1) 12년 의무교육, (2) 기술·직업 교육 개혁 방안, (3) 통합 유치원, 유아원 정책, (4) 대학 설립 및 폐교 기준 (5) 대학들의 국제적 명성 획득 전략 등으로 대표 된다. 이러한 교육 정책 실행 후 기대되는 효과로는 (1) 사회적 혜택을 받지 못하는 학생들을 위한 보조금 지급, (2) 출생률 저하에 따른 재능 교육 책정, (3) 고등교육의 국제화, (4) 교육-직업 간의 부조화 격차 감소가 있다. 또한 대만 정부는 APEC회원들과의 민간 및 공공 부문의 협조를 통하여 교육정책 효과 를 극대화하고자 하는 목표를 가지고 있다. 그리고 ‘지역 경제 통합’과 ‘녹색 성장’이라는 주제로 APEC에 국가 간 교육적 협력을 강화하기 위하여 다양한 제안을 성명하고 있다.

The introduction of ceramic particulate into metallic powder will unavoidably lower the compressibility and formability of the mixed powder. In this study, warm compaction, which is a simple and low cost technique to produce high density PM parts, was introduced in preparing composite. The aim of this paper is to prepare the warm compacted NbC particulate reinforced Fe-based composite, then study its tribological behavior and application in the valve-guide cup. A 15 wt.% NbC reinforced iron-based composite was prepared. It possesses a relative density of 98%, a tensile strength of 515 MPa, a hardness of HRC 58 and a remarkable tribological behavior.

Micro-porous nickel (Ni) with an open cell structure was fabricated by powder metallurgy. The pore size of the micro-porous Ni approximated and . For comparison, porous Ni with a macro-porous structure were also prepared by both powder metallurgy (pore size ) and the traditional chemical vapour deposition method (pore size ). The mechanical properties of the micro-and macro-porous Ni samples were evaluated using compressive tests. Results indicate that the micro-porous Ni samples exhibited significantly enhanced mechanical properties, compared to those of the macro-porous Ni samples.

Three different male-sterile cytoplasmic lines and their common maintainer 'Zhenshan 97B' and two elite restorer lines were used to study cytoplasmic effects on agronomic trait manifestation per se under different nitrogen supply levels. The result showed that cytoplasmic effects could be modified by nitrogen environments. The cytoplasmic effect on grain yield under 150 kg N/ha varied depending on crosses, while it was significantly negative in most crosses under both 60 and 330 kg N/ha. The correlation and path-coefficient analyses suggested that it was expected to improve cytoplasmic effects through reducing maximum tillers and increasing the percentage of productive tillers, leading to increased productive tillers and higher yield in hybrid rice by the aid of cultural practice and genetic transformation. This study also revealed that the same cytoplasm in different combinations had differential effect under the same nitrogen environment, indicating that cytoplasmic effect was produced by interaction of nuclear genes with cytoplasm rather than cytoplasm per se. These results indicated the usefulness of evaluating diverse cytoplasmic sources in various nuclear genotypes bred for hybrid rice breeding program. The finding also suggested that negative cytoplasmic effect could be effectively overcome by elite restorer lines through the interaction of nuclear genes with female cytoplasm.