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Open access

Pinghua Yang and Yuji Liu

Abstract

This paper is concerned with four-point boundary value problems of the one-dimensional generalized Lane-Emden systems on whole lines. The Green’s functions G(t, s) for the problem (ρ(t)x′(t)) = 0 with boundary conditions limtx(t)kx(ξ)=limt+x(t)lx(η)=0 and limtx(t)kx(ξ)=limt+ρ(t)x(t)lp(η)x(η)=0 are obtained respectively. We proved that G(t, s) ≥ 0 under some assumptions which actually generalize a corresponding result in [J. Math. Anal. Appl. 305 (2005) 253-276]. Sufficient conditions to guarantee the existence of positive solutions of this kind of models are established. Examples are given at the end of the paper.

Open access

Li-Feng Yang, Jing-Ying Liu and Yan-Hui Liu

Abstract

Objective

The aim of this study was to explore whether positive emotion mediates the relationship between job burnout and turnover intentions among Chinese nurses.

Methods

A cross-sectional survey was conducted in the present study. Full-time registered nurses (n = 150) from Grade A hospitals in Tianjin were surveyed. Pearson correlation, hierarchical regression analyses, and the Sobel test were used in the study.

Results

The results illustrated that positive emotion mediated the relationship between burnout and nurses’ turnover intention.

Conclusions

Nursing administrators should pay more attention to the benefits of positive emotions on working motivation. It is helpful to relieve burnout in the working process so that nurses are willing to remain in their current employment.

Open access

Liu Bin, Meng Zhang, Liu Lixia, Zang Aimin, Yang Hua, Shang Yanhong, Yang Yang, Gao Feng, Liu Bo, Zhang Yonggang and Tian Huiping

Abstract

Background: MiRNA-30c was a tumor suppressor in several human cancers, however, its association with clinicopathological features and prognosis in colorectal cancer (CRC) is unclear.

Materials and Methods: The expression level of miRNA-30c in 192 pairs of colorectal cancer and adjacent normal tissues was detected by Quantitative RT-PCR, the association between miRNA-30c expression and clinical characteristics and prognosis were statistically analyzed.

Results: miRNA-30c was significantly lower in CRC tissues specimens compared with matched normal adjacent tissue (P<0.001). MiRNA-30c was positively correlated with tumor size (P=0.012), TMN stage (P=0.002) and lymph node metastasis (P=0.004). The univariate analysis showed CRC patients with low miRNA-30c had distinctly shorter overall survival (P<0.001) than patients with high miRNA-30c expression level. The multivariate analysis was performed and informed that low miRNA-30c expression (P<0.001) might be an independent prognostic predictor for poor prognosis.

Conclusion: miRNA-30c could predict the prognosis of colorectal cancer which is helpful to choose reasonable treatment measures.

Open access

Qian Wu, Alina Shamsuddin, Rosmaini Tasmin, Josu Takala and Yang Liu

Transformational Leadership in Operational Competitiveness Improvement: A Case Study in Malaysian Automotive Industry

The purpose of this paper is to analyze operational competitiveness by two core factors, i.e. manufacturing strategy and transformational leadership with technology level. In additional, CFI models in sense and respond (S&R) method are introduced to optimize strategic adjustments, which give supports in fast strategic decision-making process. The analysis results of case study show that leaders in automobile companies in Malaysia should deeply develop their leadership by inspirational motivation, intellectual stimulation and building trust and confidence etc. to improve operational competitiveness. Agile operations strategy should be utilized towards automobile enterprises in Malaysia in order to be competitive under dynamic and tightrope business situations.

Open access

Zhaohua Liu, Yang Mi and Yuliang Mao

Abstract

Signal denoising can not only enhance the signal to noise ratio (SNR) but also reduce the effect of noise. In order to satisfy the requirements of real-time signal denoising, an improved semisoft shrinkage real-time denoising method based on lifting wavelet transform was proposed. The moving data window technology realizes the real-time wavelet denoising, which employs wavelet transform based on lifting scheme to reduce computational complexity. Also hyperbolic threshold function and recursive threshold computing can ensure the dynamic characteristics of the system, in addition, it can improve the real-time calculating efficiency as well. The simulation results show that the semisoft shrinkage real-time denoising method has quite a good performance in comparison to the traditional methods, namely soft-thresholding and hard-thresholding. Therefore, this method can solve more practical engineering problems.

Open access

Hai Liu, Maiying Zhong and Rui Yang

Abstract

This paper deals with the problem of robust fault detection (FD) for an unmanned aerial vehicle (UAV) flight control system (FCS). A nonlinear model to describe the UAV longitudinal motions is introduced, in which multiple sources of disturbances include wind effects, modeling errors and sensor noises are classified into groups. Then the FD problem is formulated as fault detection filter (FDF) design for a kind of nonlinear discrete time varying systems subject to multiple disturbances. In order to achieve robust FD performance against multiple disturbances, simultaneous disturbance compensation and H1/H optimization are carried out in designing the FDF. The optimality of the proposed FDF is shown in detail. Finally, both simulations and real flight data are applied to validate the proposed method. An improvement of FD performance is achieved compared with the conventional H1/H-FDF.

Open access

Pengfei Huang, Yang Liu, Zhixiu Du, Qilong Chen and Jinhai Chen

Abstract

The ship’s pilot can obtain the ship auxiliary information through the navigation system, when berthing system can display the parameters such as traverse speed and distance of the ship. But most of the system data show that there are insufficient precision. Taking the CORS system to obtain the location information, data Calculation of Berthing System based on Polar Coordinate Algorithm, this paper puts forward a solution to the “dead point” of the berthing and aiding system, which has a certain reference value for the design of the ship berthing assistance system.

Open access

Vesa-Jukka Vornanen, Josu Takala and Yang Liu

Abstract

How to ensure that the various levels of the organization are operating in accordance with a common strategy? According to the Hallberg committee’s Preparedness and comprehensive security report [1] the key challenges the public sector organization faces lies in finding new ways of operating horizontally across various levels of administration. This paper aims to develop the preparedness in the target organization by strategy’s resource-based identification for implementing sustainable competitive advantages to the public sector’s management system. The research methods used are a case study and surveys, which were connected by the analytical hierarchy process based form and two sense and respond (S&R) based forms. The longitudinal data for the surveys were collected in two phases and analyzed with the balanced critical factor index method [2] and transformational leadership indexes (TLI) with technology levels [3]. The BCFI & TLI method identifies and clarifies the unit’s development and risk factors. According to [4] during the process of sense and respond, it is important to develop an operational strategy adjustment system by utilizing critical factor evaluation. As [5] describes in her dissertation if there were clear goals defined for the quality of the (public) services the natural choice of the approach in the purpose of evaluation for accountability would be the goal-attainment evaluation. The innovative findings lay the groundwork for the decision makers to focus efforts and readjust the operations of the target organization in order to achieve operational sustainable competitive advantage (OSCA).