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关于试题难度系数调整算法和组卷算法的研究

燕山大学学报 2007年第3期31卷 266-268页

作者：刘文刘艳伟刘秋梅燕山大学理学院河北秦皇岛066004

为了提高在线考试系统组卷的效率,增强考试系统的实用性,提出了基于试题难度系数动态调整的算法和具有组卷条件优先权选择的抽题算法。这两种算法不仅解决了试题难度系数难以确定的问题,而且有效提高了抽题组卷的速度和效率。

关键词：算法动态优先权

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组卷难度分布算法的研究

信息技术 2007年第4期31卷 95-96,99页

作者：刘文刘艳伟刘秋梅燕山大学理学院秦皇岛066004

创建了离散型随机分布函数Poisson分布构建程序算法,来完成计算机智能组卷系统中试题的难度分布问题,并结合循环约束抽题算法,快速准确的从试题库中抽取符合出题者要求的试卷,此算法不仅保证了组卷的成功率,而且提高了数据运算的时间效率。

关键词：分布函数循环约束算法

Nanograting-Based Dynamic Structural Colors Using Heterogeneous Materials

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NANO-MICRO LETTERS 2025年第1期17卷 1-14页

作者： Wang, Jingang Yu, Haibo Zheng, Jianchen Zhang, Yuzhao Guo, Hongji qiu, Ye Wang, Xiaoduo Yang, Yongliang liu, Lianqing Chinese Acad Sci Shenyang Inst Automat State Key Lab Robot Shenyang 110016 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

A 2.5-dimensional dynamic structural color based on nanogratings of heterogeneous materials was proposed by interweaving a pH-responsive hydrogel with IP-L *** nanogrid structures exhibit brilliant tuneable structural color, high sensitivity, and ultrafast recovery speeds in response to *** 4D printing-based grayscale design approach was proposed for the patterned encoding and array printing of dynamic structural colors, promoting their application in patterned printing, information encryption, and microfluidic chip sensing. Dynamic structural colors can change in response to different environmental stimuli. This ability remains effective even when the size of the species responsible for the structural color is reduced to a few micrometers, providing a promising sensing mechanism for solving microenvironmental sensing problems in micro-robotics and microfluidics. However, the lack of dynamic structural colors that can encode rapidly, easily integrate, and accurately reflect changes in physical quantities hinders their use in microscale sensing applications. Herein, we present a 2.5-dimensional dynamic structural color based on nanogratings of heterogeneous materials, which were obtained by interweaving a pH-responsive hydrogel with an IP-L photoresist. Transverse gratings printed with pH-responsive hydrogels elongated the period of longitudinal grating in the swollen state, resulting in pH-tuned structural colors at a 45 degrees incidence. Moreover, the patterned encoding and array printing of dynamic structural colors were achieved using grayscale stripe images to accurately encode the periods and heights of the nanogrid structures. Overall, dynamic structural color networks exhibit promising potential for applications in information encryption and in situ sensing for microfluidic chips.

关键词： Dynamic structural colors Four-dimensional printing pH-responsive Nanogrid Heterogeneous materials

构建我国环境侵权民事救济制度的几点思考——以典型案例为切入点

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天津商学院学报 2006年第5期26卷 39-43页

作者：戚道孟刘秋妹南开大学法学院天津300071

以环境侵权的典型案例为切入点,探讨有关环境侵权民事救济中出现的法律问题,包括举证责任倒置、环境权的实体法支撑、环境侵权民事责任归责原则、环境侵权民事救济制度的完善等问题。最后,结合我国环境侵权民事救济的实践,提出建立我国... 详细信息

以环境侵权的典型案例为切入点,探讨有关环境侵权民事救济中出现的法律问题,包括举证责任倒置、环境权的实体法支撑、环境侵权民事责任归责原则、环境侵权民事救济制度的完善等问题。最后,结合我国环境侵权民事救济的实践,提出建立我国环境侵权民事救济制度的构想。

关键词：环境侵权民事救济环境权归责原则