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Search Results: 1 - 10 of 18598 matches for " DUAN Yun "
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Express Yourself or Stay Mystery? The Effect of Self-Disclosure on Entrepreneurial Identity of Team Members  [PDF]
Yun Duan, Yangyu Zhang, Jingjing Zhang
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.612018
Abstract: The entrepreneurial identity of team members is vital to team stability and entrepreneurial success. How to improve the identity of team members is a significant issue for entrepreneurs to ponder. Combining literature analysis and empirical research, this paper discusses the following issues: 1) Whether the entrepreneur’s self-disclosure has a positive impact on the members’ entrepreneurial identity; 2) The internal mechanism of how entrepreneur’s self-disclosure affects the team members’ entrepreneurial identity. The results show that in the context of entrepreneurship in China, the self-disclosure of entrepreneurs can promote the entrepreneurial identity of the team members, and the entrepreneurial passion mediates the relationship between them.
An Analysis of the Factors Influencing the Efficiency of Public-owned Colleges Run by Private Agencies
Yun Zhu,Nan Duan
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v4n7p56
Abstract: The public-owned college run by private agencies is a type of higher education with Chinese characteristics. It should maintain its differences from major universities and colleges, and make the most of the brand advantages to promote its blood-production function, which will bring about a sustainable development, so that it can realize the maximum efficiency in school management. The main factors influencing the efficiency of public-owned colleges run by private agencies are: the way the college is operated and managed, the way the fund is raised and the way the property rights are defined, etc. The appropriateness of these factors is also discussed.
Approximation Order for Multivariate Durrmeyer Operators with Jacobi Weights
Jianjun Wang,Chan-Yun Yang,Shukai Duan
Abstract and Applied Analysis , 2011, DOI: 10.1155/2011/970659
Abstract: Using the equivalence relation between -functional and modulus of smoothness, we establish a strong direct theorem and an inverse theorem of weak type for multivariate Bernstein-Durrmeyer operators with Jacobi weights on a simplex in this paper. We also obtain a characterization for multivariate Bernstein-Durrmeyer operators with Jacobi weights on a simplex. The obtained results not only generalize the corresponding ones for Bernstein-Durrmeyer operators, but also give approximation order of Bernstein-Durrmeyer operators.
An Exploration of Dynamics of the Moving Mechanism of the Growth Cone
Rubin Wang,Hatsuo Hayashi,Zhikang Zhang,Yun-Bo Duan
Molecules , 2003, DOI: 10.3390/80100127
Abstract: A stochastic, nonlinear dynamic model is proposed to explain the growth cone at the tip of a cell process, such as a growing axon or dendrite of a neuron. The model explains the outward motion of the tip as an extension of the cytoskeleton, using the actin- myosin system as a molecular motor. The kinetic energy is supplied by heat from ATP hydrolysis in the form of random motion of water molecules embedding the actin- myosin. The mechanical structure is provided by the F-actin macromolecules forming a spiral filament. The myosin heads form a stochastic distribution of small spheres. They are attached by elastic springs to the spiral rods of the myosin filaments. Under thermal agitation the system sustains oscillation, which is directed by the interaction between the myosin heads and the actin filament. As the energy of oscillation is dissipated, the actin filament is moved toward the center of the growth cone. The joint probability density of movement of the actin filament is obtained by solving a non-stationary version of the FPK equation. By incorporating a probability distribution of actin filaments provided by the geometry of the tip, the directed motion of the tip is explained.
Venous spasm during pacemaker implantation
Xu Duan,Feng Ling,Yun Shen,Hai-ying Xu
Anadolu Kardiyoloji Dergisi , 2011,
GPS-Supported Visual SLAM with a Rigorous Sensor Model for a Panoramic Camera in Outdoor Environments
Yun Shi,Shunping Ji,Zhongchao Shi,Yulin Duan,Ryosuke Shibasaki
Sensors , 2013, DOI: 10.3390/s130100119
Abstract: Accurate localization of moving sensors is essential for many fields, such as robot navigation and urban mapping. In this paper, we present a framework for GPS-supported visual Simultaneous Localization and Mapping with Bundle Adjustment (BA-SLAM) using a rigorous sensor model in a panoramic camera. The rigorous model does not cause system errors, thus representing an improvement over the widely used ideal sensor model. The proposed SLAM does not require additional restrictions, such as loop closing, or additional sensors, such as expensive inertial measurement units. In this paper, the problems of the ideal sensor model for a panoramic camera are analysed, and a rigorous sensor model is established. GPS data are then introduced for global optimization and georeferencing. Using the rigorous sensor model with the geometric observation equations of BA, a GPS-supported BA-SLAM approach that combines ray observations and GPS observations is then established. Finally, our method is applied to a set of vehicle-borne panoramic images captured from a campus environment, and several ground control points (GCP) are used to check the localization accuracy. The results demonstrated that our method can reach an accuracy of several centimetres.
Time Consistent Behavior Portfolio Policy for Dynamic Mean-Variance Formulation
Xiangyu Cui,Xun Li,Duan Li,Yun Shi
Mathematics , 2014,
Abstract: When we implement a portfolio selection methodology under a mean-risk formulation, it is essential to correctly model investors' risk aversion which may be time-dependent, or even state-dependent during the investment procedure. In this paper, we propose a behavior risk aversion model, which is a piecewise linear function of the current wealth level with a reference point at a preset investment target. Due to the time inconsistency of the resulting multi-period mean-variance model with an adaptive risk aversion, we investigate in this paper the time consistent behavior portfolio policy by solving a nested mean-variance game formulation. We derive semi-analytical time consistent behavior portfolio policy which takes a piecewise linear feedback form of the current wealth level with respect to the discounted investment target.
Effects of the Dietary Probiotic Clostridium butyricum on Intestine Digestive and Metabolic Capacities, SCFA Content and Body Composition in Marsupenaeus japonicus Effects of the Dietary Probiotic Clostridium butyricum on Intestine Digestive and Metabolic Capacities, SCFA Content and Body Composition in Marsupenaeus japonicus
DUAN Yafei,DONG Hongbiao,WANG Yun,ZHANG Yue,ZHANG Jiasong
- , 2018,
Abstract: A 56-day feeding trial was performed to evaluate the effects of dietary probiotic Clostridium butyricum(CB) on intestine digestive and metabolic capacities, intestine short-chain fatty acids(SCFA) content and body composition of kuruma shrimp Marsupenaeus japonicus. Shrimp s were randomly allocated into 9 tanks, 30 each, and f ed with diets containing different levels of C. butyricum(1×10~9 cfug~(-1)): 0 mgg~(-1) feed(Control), 100 mgg~(-1) feed(CB-100), 200 mgg~(-1) feed(CB-200), while each level was triplicated. The results indicated that compared with the control group, the intestine pepsin(Pep) activity and 5-hydroxytryptamine(5-HT) concentration of two C. butyricum group s were both increased. Amylase(AM Y) and lipase(LPS) activities wer e only induced in CB-200 group. Alanine aminotransferase(ALT) and aspartate aminotransferase(A ST) activities of two C. butyricum group s showed no significant change. The α-amylase(AM Y) gene expression was induced in CB-200 group, and tryp sin gene expression of two C. butyricum treated group s were both induced. Intestine SCFA content and body composition analysis showed that the contents of propionic acid, butyric acid and the crude protein of two C. butyricum group s were all higher than those of control. These results revealed that C. butyricum can modulate intestine digestive and metabolic capacities, improve intestine SCFA content and body crude protein content in M. japonicus
The Gravity Environment of Zhouqu Debris Flow of August 2010 and Its Implication for Future Recurrence  [PDF]
Diandong Ren, Lance M. Leslie, Xinyi Shen, Yang Hong, Qingyun Duan, Rezaul Mahmood, Yun Li, Gang Huang, Weidong Guo, Mervyn J. Lynch
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.64025
Abstract: This study investigates the geological background of the August 7-8, 2010 Zhouqu debris flows in the northwestern Chinese province of Gansu, and possible future occurrence of such hazards in the peri-Tibetan Plateau (TP) regions. Debris flows are a more predictable type of landslide because of its strong correlation with extreme precipitation. However, two factors affecting the frequency and magnitude of debris flows: very fine scale precipitation and degree of fracture of bedrock, both defy direct observations. Annual mean Net Primary production (NPP) is used as a surrogate for regional precipitation with patchiness filtered out, and gravity satellite measured regional mass changes as an indication of bedrock cracking, through the groundwater as the nexus.The GRACE measurements indicate a region (to the north east of TP) of persistent mass gain (started well before the 2008 Wenchuan earthquake), likely due to increased groundwater percolation. While in the neighboring agricultural region further to the north east, there are signal of decreased fossil water reservoir. The imposed stress fields by large scale increase/decrease groundwater may contribute to future geological instability of this region. Zhouqu locates right on the saddle of the gravity field anomaly. The region surrounding the Bay of Bangle (to the southeast of TP) has a similar situation. To investigate future changes in extreme precipitation, the other key player for debris flows, the “pseudo-climate change” experiments of a weather model forced by climate model provided perturbations on the thermal fields are performed and endangered locations are identified. In the future warmer climate, extreme precipitation will be more severe and debris will be more frequent and severe.
Higher-Order Numeric Solutions for Nonlinear Systems Based on the Modified Decomposition Method  [PDF]
Junsheng Duan
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.21001

Higher-order numeric solutions for nonlinear differential equations based on the Rach-Adomian-Meyers modified decomposition method are designed in this work. The presented one-step numeric algorithm has a high efficiency due to the new, efficient algorithms of the Adomian polynomials, and it enables us to easily generate a higher-order numeric scheme such as a 10th-order scheme, while for the Runge-Kutta method, there is no general procedure to generate higher-order numeric solutions. Finally, the method is demonstrated by using the Duffing equation and the pendulum equation.

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