Rumors are a type of false information, a consequence of an asymmetrical informational structure. This paper focuses on the social mechanisms of rumor fulfilling. Rumors with important contents related to people’s pe...Rumors are a type of false information, a consequence of an asymmetrical informational structure. This paper focuses on the social mechanisms of rumor fulfilling. Rumors with important contents related to people’s personal interests win acceptance through changing people’s expected payoffs, misleading people to the belief that acceptance of the rumor would beneficially outperform rejection of it. Nevertheless, it is risky to believe rumors; therefore, people make their decision whether to believe a rumor or not by referring to other people’s choices. An analysis was performed first within a game model that incorporated the variables of an individual’s expectancy and other people’s impact to predict whether the individual would accept or reject a rumor. Another analysis followed to further examine the functions of some dynamic mechanisms in rumor fulfilling when group pressure and network effects were introduced. Finally, an exploratory discussion on how to prevent rumors and erase their effects via information management strategies was presented.展开更多
【目的】促进国内期刊编辑人员了解国际眼科学期刊影响因子的构成,同时为编辑组稿、栏目策划等提供参考依据。【方法】利用Web of Science数据平台,详细分析了2013年SCI 10种眼科学权威期刊的不同文献类型、期刊自引及高被引论文对影响...【目的】促进国内期刊编辑人员了解国际眼科学期刊影响因子的构成,同时为编辑组稿、栏目策划等提供参考依据。【方法】利用Web of Science数据平台,详细分析了2013年SCI 10种眼科学权威期刊的不同文献类型、期刊自引及高被引论文对影响因子的贡献度。【结果】10种眼科学权威期刊中,自引对影响因子的贡献度平均为13.58%,可见他引对期刊影响因子起决定性作用;高被引论文对期刊影响因子的贡献度普遍较高;Article和Review是影响因子构成的中坚力量,除此之外,Letter、Editorial material、Proceedings paper、Correction、Biographical item和Reprint等对影响因子的贡献不容忽视。【结论】只有吸引大量高质量论文才是提高期刊学术影响力的正确途径;增加非Article和Review的可被引文献类型对提高影响因子有一定作用;可借鉴SCI期刊的栏目设计,丰富期刊的文献类型。展开更多
On the windward side of an aircraft,the components with higher probability of impact with birds are the wing-type leading edge structures,such as the wing and tail.A study on the damage sensitivity of a wing-type lead...On the windward side of an aircraft,the components with higher probability of impact with birds are the wing-type leading edge structures,such as the wing and tail.A study on the damage sensitivity of a wing-type leading edge structure under bird strikes was presented in this paper.First,a bird strike test was carried out on a wing.The principles of the bird strike test equipment and method were introduced in detail,including the bird strike test system,bird projectile production process and data acquisition system.The dynamic strain measurement results,the high-speed camera videos,and the final deformation and damage morphology observations of the structure were obtained.Based on the coupled Smooth Particle Hydrodynamics(SPH)-Finite Element Method(FEM),the commercial software PAM-CRASH was used to simulate the process of a bird strike with the wing.The good agreement between the finite element simulation results and the experimental results shows that the calculation method and the numerical model presented in this paper were reasonable.On this basis,wing-type leading edge structures can be designed by adding triangular support.The bird strike resistances of an original structure and improved structure were studied by numerical simulation.The calculated results show that the improved wing-type leading edge structure is less damaged than the original structure under bird strike.The improved leading edge structure satisfied the anti-bird strike airworthiness requirements,as the thickness of the triangular support was 1.2 mm,and the weight of the structure was reduced by 0.87 kg compared with the original structure.This indicated that the bird strike resistance of the improved structure is better than that of the original structure,and the improved design of the wing-type leading edge structure presented in this paper is reasonable.展开更多
The acceleration saltation of the traditional S-type acceleration model in the speed planning of the NURBS curve will result in the vibration and flexible impact of the machine tool.It will affect the surface quality ...The acceleration saltation of the traditional S-type acceleration model in the speed planning of the NURBS curve will result in the vibration and flexible impact of the machine tool.It will affect the surface quality of the components.The high speed smooth S-type acceleration and deceleration model deals with flexible impact,but the calculation is tedious.Aimed at the above problems,the traditional S-type acceleration and deceleration model is improved to make the jerk change linearly at a certain slope to reduce the flexible impact.Before the speed planning,it is needed to find the arc length and curvature of each point on the NURBS curve with a tiny step,and to determine the speed sensitivity point on the curve accordingly.According to the speed sensitive point,the NURBS curve is segmented.The attribute parameters of each section are determined by adaptive speed planning.Then,the speed planning can be performed on the NURBS curve according to the speed characteristics classification.The simulation results show that the algorithm can effectively reduce the flexible impact,improve the machining precision and efficiency,and simplify the classification of speed characteristics.展开更多
OBJECTIVE: To assess the medication adherence reporting in clinical trials the field of Traditional Chinese Medicine(TCM) and the impact factors of medication adherence.METHODS: Reviewed and evaluated were all randomi...OBJECTIVE: To assess the medication adherence reporting in clinical trials the field of Traditional Chinese Medicine(TCM) and the impact factors of medication adherence.METHODS: Reviewed and evaluated were all randomized clinical trials in the field of TCM in treatment of type 2 diabetes mellitus published in Chinese journals in 2012, in terms of their medication adherence, adherence measurement, and impacted factors of adherence.RESULTS: Finally 124 studies were included. Nonestudies reported the medication adherence. The factors impacting medication adherence couldn't be analyzed due to none reporting adherence.CONCLUSION: Medication adherence reporting was poor in clinical trials in TCM research. Establishing standards for adherence assessment and reporting may be one of the important steps to improve the quality of clinical studies.展开更多
文摘Rumors are a type of false information, a consequence of an asymmetrical informational structure. This paper focuses on the social mechanisms of rumor fulfilling. Rumors with important contents related to people’s personal interests win acceptance through changing people’s expected payoffs, misleading people to the belief that acceptance of the rumor would beneficially outperform rejection of it. Nevertheless, it is risky to believe rumors; therefore, people make their decision whether to believe a rumor or not by referring to other people’s choices. An analysis was performed first within a game model that incorporated the variables of an individual’s expectancy and other people’s impact to predict whether the individual would accept or reject a rumor. Another analysis followed to further examine the functions of some dynamic mechanisms in rumor fulfilling when group pressure and network effects were introduced. Finally, an exploratory discussion on how to prevent rumors and erase their effects via information management strategies was presented.
基金supported by the Civil Aviation Security Capacity Building Fundthe Civil Aircraft 13th Five Year Pre-Research Project,China (No. MJ-2018-F-18)
文摘On the windward side of an aircraft,the components with higher probability of impact with birds are the wing-type leading edge structures,such as the wing and tail.A study on the damage sensitivity of a wing-type leading edge structure under bird strikes was presented in this paper.First,a bird strike test was carried out on a wing.The principles of the bird strike test equipment and method were introduced in detail,including the bird strike test system,bird projectile production process and data acquisition system.The dynamic strain measurement results,the high-speed camera videos,and the final deformation and damage morphology observations of the structure were obtained.Based on the coupled Smooth Particle Hydrodynamics(SPH)-Finite Element Method(FEM),the commercial software PAM-CRASH was used to simulate the process of a bird strike with the wing.The good agreement between the finite element simulation results and the experimental results shows that the calculation method and the numerical model presented in this paper were reasonable.On this basis,wing-type leading edge structures can be designed by adding triangular support.The bird strike resistances of an original structure and improved structure were studied by numerical simulation.The calculated results show that the improved wing-type leading edge structure is less damaged than the original structure under bird strike.The improved leading edge structure satisfied the anti-bird strike airworthiness requirements,as the thickness of the triangular support was 1.2 mm,and the weight of the structure was reduced by 0.87 kg compared with the original structure.This indicated that the bird strike resistance of the improved structure is better than that of the original structure,and the improved design of the wing-type leading edge structure presented in this paper is reasonable.
基金the National Key Basic Research Program of China(973 Program)(No.2014CB046501)。
文摘The acceleration saltation of the traditional S-type acceleration model in the speed planning of the NURBS curve will result in the vibration and flexible impact of the machine tool.It will affect the surface quality of the components.The high speed smooth S-type acceleration and deceleration model deals with flexible impact,but the calculation is tedious.Aimed at the above problems,the traditional S-type acceleration and deceleration model is improved to make the jerk change linearly at a certain slope to reduce the flexible impact.Before the speed planning,it is needed to find the arc length and curvature of each point on the NURBS curve with a tiny step,and to determine the speed sensitivity point on the curve accordingly.According to the speed sensitive point,the NURBS curve is segmented.The attribute parameters of each section are determined by adaptive speed planning.Then,the speed planning can be performed on the NURBS curve according to the speed characteristics classification.The simulation results show that the algorithm can effectively reduce the flexible impact,improve the machining precision and efficiency,and simplify the classification of speed characteristics.
基金the National Natural Science Foundation Project of China,No.81102733(Patient Compliance Assessment Method in Clinical Trial of Traditional Chinese Medicine:"Interplayer Transformation")the National Basic Research Program of China(973 program),No.2015CB554401(Clinical Study on Syndrome of Qi Deficiency and Blood Stasis)
文摘OBJECTIVE: To assess the medication adherence reporting in clinical trials the field of Traditional Chinese Medicine(TCM) and the impact factors of medication adherence.METHODS: Reviewed and evaluated were all randomized clinical trials in the field of TCM in treatment of type 2 diabetes mellitus published in Chinese journals in 2012, in terms of their medication adherence, adherence measurement, and impacted factors of adherence.RESULTS: Finally 124 studies were included. Nonestudies reported the medication adherence. The factors impacting medication adherence couldn't be analyzed due to none reporting adherence.CONCLUSION: Medication adherence reporting was poor in clinical trials in TCM research. Establishing standards for adherence assessment and reporting may be one of the important steps to improve the quality of clinical studies.
