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Acta Mathematicae Applicatae Sinica 2008年第1期24卷 85-98页

作者： xi-zhi wu Mao-zai Tian Center for Applied Statistics School of Statistics Renmin University of China Beijing 100872 China School of Statistics Renmin University of China Beijing 100872 China

Quantile regression is gradually emerging as a powerful tool for estimating models of conditional quantile functions, and therefore research in this area has vastly increased in the past two decades. This paper, with the quantile regression technique, is the first comprehensive longitudinal study on mathematics participation data collected in Alberta, Canada. The major advantage of longitudinal study is its capability to separate the so-called cohort and age effects in the context of population studies. One aim of this paper is to study whether the family background factors alter performance on the mathematical achievement of the strongest students in the same way as that of weaker students based on the large longitudinal sample of 2000, 2001 and 2002 mathematics participation longitudinal data set. The interesting findings suggest that there may be differential family background factor effects at different points in the mathematical achievement conditional distribution.

关键词： Mathematical achievement family background factors quantile regression confidence intervals,longitudinal study

Quasi-periodic events on structured earthquake models

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Chinese Physics B 2019年第9期28卷 50-56页

作者： Bin-Quan Li zhi-xi wu Sheng-Jun Wang Institute of Computational Physics and Complex Systems Lanzhou UniversityLanzhou 730000China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710119China

There has been much interest in studying quasi-periodic events on earthquake *** we investigate quasiperiodic events in the avalanche time series on structured earthquake models by the analysis of the autocorrelation function and the fast Fourier *** random spatial earthquake models, quasi-periodic events are robust and we obtain a simple rule for a period that is proportional to the choice of unit time and the dissipation of the ***, computer simulations validate this rule for two-dimensional lattice models and cycle graphs, but our simulation results also show that small-world models, scale-free models, and random rule graphs do not have periodic *** the periodicity of avalanche does not depend on the criticality of the system or the average degree of the system or the size of the system,there is evidence that it depends on the time series of the average force of the system.

关键词： quasi-periodic event self-organized criticality earthquake model

Non-monotonic behavior of jam probability and stretchedexponential distribution in pedestrian counterflow

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Chinese Physics B 2024年第9期33卷 259-266页

作者： Ze-Hao Chen zhi-xi wu Jian-Yue Guan College of Physical Science and Technology Guangxi Normal UniversityGuilin 541004China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Key Laboratory for Quantum Theory and Applications of the Ministry of EducationLanzhou UniversityLanzhou 730000China

We adopt a floor field cellular automata model to study the statistical properties of bidirectional pedestrian flow movingin a straight corridor. We introduce a game-theoretic framework to deal with the conflict of multiple pedestrians tryingto move to the same target location. By means of computer simulations, we show that the complementary cumulative distributionof the time interval between two consecutive pedestrians leaving the corridor can be fitted by a stretched exponentialdistribution, and surprisingly, the statistical properties of the two types of pedestrian flows are affected differently by theflow ratio, i.e., the ratio of the pedestrians walking toward different directions. We also find that the jam probability exhibitsa non-monotonic behavior with the flow ratio, where the worst performance arises at an intermediate flow ratio of around0.2. Our simulation results are consistent with some empirical observations, which suggest that the peculiar characteristicsof the pedestrians may attributed to the anticipation mechanism of collision avoidance.

关键词： traffic and crowd dynamics evolutionary game theory

Effects of the planarity and heterogeneity of networks on evolutionary two-player games

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Chinese Physics B 2018年第12期27卷 164-171页

作者： Xu-Sheng Liu zhi-xi wu Jian-Yue Guan Institute of Computational Physics and Complex Systems Lanzhou University

We study the effects of the planarity and heterogeneity of networks on evolutionary two-player symmetric games by considering four different kinds of networks, including two types of heterogeneous networks: the weighted planar stochastic lattice(a planar scale-free network) and the random uncorrelated scale-free network with the same degree distribution as the weighted planar stochastic lattice; and two types of homogeneous networks: the hexagonal lattice and the random regular network with the same degree k_0= 6 as the hexagonal lattice. Using extensive computer simulations, we found that both the planarity and heterogeneity of the network have a significant influence on the evolution of cooperation, either promotion or inhibition, depending not only on the specific kind of game(the Harmony, Snowdrift, Stag Hunt or Prisoner's Dilemma games), but also on the update rule(the Fermi, replicator or unconditional imitation rules).

关键词： evolutionary two-player games planarity heterogeneity

Non-Smooth Morphologies of Typical Plant Leaf Surfaces and Their Anti-Adhesion Effects

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Journal of Bionic Engineering 2007年第1期4卷 33-40页

作者： Lu-quan Ren Shu-jie Wang xi-mei Tian zhi-wu Han Lin-na Yan Zhao-mei Qiu Key Laboratory of Terrain-Machine Bionics Engineering （Ministry of Education China） Jilin University （Nanling Campus） Changchun 130022 P. R. China

The micromorphologies of surfaces of several typical plant leaves were investigated by scanning electron microscopy（SEM）. Different non-smooth surface characteristics were described and classified. The hydrophobicity and anti-adhesion of non-smooth leaf surfaces were quantitatively measured. Results show that the morphology of epidermal cells and the morphology and distribution density of epicuticular wax directly affect the hydrophobicity and anti-adhesion. The surface with uniformly distributed convex units shows the best anti-adhesion, and the surface with regularly arranged trellis units displays better anti-adhesion. In contrast, the surface with randomly distributed hair units performs relatively bad anti-adheslon. The hydrophobic models of papilla-ciliary and fold-setal non-smooth surfaces were set up to determine the impacts of geometric parameters on the hydrophobicity. This study may provide an insight into surface machine molding and apparent morphology design for biomimetics engineering.

关键词： bionics non-smooth leaf surface hydrophobicity anti-adhesion

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破坏主义:梁启超早期的新民策略

东方论坛（青岛大学学报） 2014年第2期 20-26页

作者：席志武北京师范大学文学院北京100875

梁启超的"破坏主义"主张经历了一个由萌芽到成熟再到完全放弃的过程。它的流变与梁启超对于时局的认识有着密切的关联,同时包含有梁氏本人对于中国传统社会和文化思想的深沉思考。从它的最终旨趣来看,破坏主义所指向的仍是开民智、兴民... 详细信息

梁启超的"破坏主义"主张经历了一个由萌芽到成熟再到完全放弃的过程。它的流变与梁启超对于时局的认识有着密切的关联,同时包含有梁氏本人对于中国传统社会和文化思想的深沉思考。从它的最终旨趣来看,破坏主义所指向的仍是开民智、兴民权等新民主义内容。因之也可说,破坏主义实际上是梁启超早期的一种新民策略。

关键词：梁启超破坏主义新民策略

Smart Cellulose‑Based Janus Fabrics with Switchable Liquid Transportation for Personal Moisture and Thermal Management

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Nano-Micro Letters 2025年第1期17卷 333-347页

作者： Jianfeng xi Yanling Lou Liucheng Meng Chao Deng Youlu Chu Zhaoyang Xu Huining xiao Weibing wu Jiangsu Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsJiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass MaterialsNanjing Forestry UniversityNanjing 210037People’s Republic of China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China Department of Chemical Engineering University of New BrunswickFrederictonNB E3B 5A3Canada Macromolecular Chemistry and Bavarian Polymer Institute University of BayreuthBayreuth 95440Germany

The Janus fabrics designed for personal moisture/thermal regulation have garnered significant attention for their potential to enhance human ***,the development of smart and dynamic fabrics capable of managing personal moisture/thermal comfort in response to changing external environments remains a ***,a smart cellulose-based Janus fabric was designed to dynamically manage personal moisture/*** cotton fabric was grafted with N-isopropylacrylamide to construct a temperature-stimulated transport ***,hydrophobic ethyl cellulose and hydrophilic cellulose nanofiber were sprayed on the bottom and top sides of the fabric to obtain wettability *** fabric exhibits anti-gravity directional liquid transportation from hydrophobic side to hydrophilic side,and can dynamically and continuously control the transportation time in a wide range of 3–66 s as the temperature increases from 10 to 40℃.This smart fabric can quickly dissipate heat at high temperatures,while at low temperatures,it can slow down the heat dissipation rate and prevent the human from becoming too *** addition,the fabric has UV shielding and photodynamic antibacterial properties through depositing graphitic carbon nitride nanosheets on the hydrophilic *** smart fabric offers an innovative approach to maximizing personal comfort in environments with significant temperature variations.

关键词： Directional water transport Cotton fabric Anti-gravity directional liquid transportation Janus wettability

Vibration control in reticulated shells using viscous dampers system

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Journal of Harbin Institute of Technology(New Series) 2000年第S1期7卷 7-11页

作者： FAN Feng, ZHAI xi-mei, wu zhi-feng (School of Architectural Engineering and Design, Harbin Institute of Technology, Harbin 150001, China)

A finite-element analysis program was developed for the reducing vibration system of viscous damper incorporated into reticulated shells, and a lot of numerical calculations were done on vibration control in reticulated shells. With viscous dampers suitable for reticulated shells designed are developed, and performance tests run for them one K6 reticulated shell model is designed and developed, and a reducing vibration shaking table experiment was conducted with a viscous damper on this shell model. All these come to a conclusion that the reducing vibration system of viscous damper can be applied to reticulated shells.

关键词： reticulated shells viscous damper shaking table experiment

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文明论视域下梁启超的小说理论与创作实践

南昌大学学报（人文社会科学版） 2017年第4期48卷 104-111页

作者：席志武蔡丽华南昌大学新闻与传播学院江西南昌330031 江西卫生职业学院江西南昌330020

梁启超的"小说界革命"掀开了中国小说史上崭新的一页。他的理论主张与创作实践包含着对于欧西小说的政治想像,体现出一种深在的文明等级观念。梁启超对传统小说的批判及对欧西小说的借镜,充分说明他认同并接受了以西方为中心的知识范式... 详细信息

梁启超的"小说界革命"掀开了中国小说史上崭新的一页。他的理论主张与创作实践包含着对于欧西小说的政治想像,体现出一种深在的文明等级观念。梁启超对传统小说的批判及对欧西小说的借镜,充分说明他认同并接受了以西方为中心的知识范式与文明观念。从文明论视角对梁启超的小说界革命理论与创作实践进行探讨,具有重要的反思性意义。这种意义,不仅体现于我们以怎样的视角去回顾过去的小说发展历程,还体现在"四个自信"的文化语境下我们以一种更为自觉的方式建构起中国文学与文化发展的路径。

关键词：梁启超小说界革命新中国未来记文明论

Prisoner’s dilemma game with heterogeneous influential effect on regular small-world networks

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Prisoner’s dilemma game with heterogeneous influential effe...