染整实验教学中如何加强对学生能力的培养

本文根据染整专业改革的思想,围绕染整实验教学中出现的问题,提出如何通过实验课的各个环节、各种实验手段和教学方法来开发学生智力、启迪学生思维、培养学生观察、分析判断问题的能力及解决问题的能力。     

基于小波域分形编码的图像插值

传统的图像插值方案(包括最近邻插值、双线性插值和B样条插值等),大多是基于图像分块的光滑连续模型。由于该模型不能很好地描述自然图像的特点,因此插值得到的图像质量不高。为寻求更有效的插值方案,首次提出了基于小波域分形编码的插值算法。该算法在FW编码的基础上,首先利用图像的局部自相似模型,通过小波树的膨胀,并借助小波域的第1级子带,对超分辨率级的第0级子带进行最优预测,再经过小波反变换来得到插值图像。标准测试图像的实验表明,该插值算法与传统的双线性插值相比,不仅可以获得清晰的纹理和边缘,而且峰值信噪比也更高,因此插值得到的图像更加精确、真实。     

基于同时发射声纳环移动机器人导航系统

开发了一种能在未知环境下实现快速障碍检测与障碍回避的基于同时发射声纳环移动机器人导航系统。为了消除由于同时发射造成的串话干扰,提出了一种基于神经网络模式识别的过滤方法;并制作了由24个声纳传感器组成的声纳环安装到实际的移动机器人上,实现了扫描频率最大可达到66Hz的全景检测。系统中应用了动态窗口法来完成快速障碍回避的运动规划。实际的导航实验表明,系统可用于室内未知环境中的移动机器人快速导航。     

构建“以教师为主导、学生为主体、师生双边活动”学习模式

在全国大学英语教学改革的背景下,以全新的教育理念为指导,探索我校大学英语教学新模式,即"以教师为主导、学生为主体、师生双边活动"教学模式。提高我校大学英语大型课堂的教学效果,培养学生自主学习能力。     

THE ROLE OF HOSPITAL COMPETITION ON TREATMENT EXPENDITURE AND OUTCOME: EVIDENCE FROM STROKE AND CARDIAC TREATMENT IN TAIWAN

This article examines whether market competition affects treatment expenditure and health outcomes of stroke and cardiac treatment in Taiwan. Our measure of treatment expenditure is the hospital expenditure paid at the index admission (short term) and the sum of inpatient and outpatient expenditures paid in the subsequent year (long term). Our measure of health outcome is the probability of death in 1 and 12 months after the hospital's discharge. Our measure of competition follows the method developed by Kessler and McClellan that calculates the Herfindal index based on the predicted patient flows using exogenous variables (e.g., traveling distance to hospitals). Using data of patients hospitalized for new stroke and cardiac treatment between 1997 and 2001 in Taiwan, we find that an increase of market competition results in an insignificant impact on a patient's mortality. In terms of treatment expenditure, our results indicate that hospitals facing more competition incur higher expenditures, either the short‐ or long‐term expenditure. Finally, we find evidence showing that an increase of treatment expenditure at admission is due to a raise of length of stay and treatment intensity per day as well as the usage of expensive equipment. (JEL I11, L13, L41)     

侯方域研究的回顾与展望

侯方域是明清之际士大夫的领袖人物,誉满当时文坛,但因其参加清廷乡试、献计剿灭榆园军,此类"变节"行为遭致后人颇多诟病。随着上世纪60年代《桃花扇》的改编和演出,更是引起了人们对侯方域严厉的道德批判。从目前的研究现状看,学界普遍关注侯方域的生平考辨与作品整理、入清前后的人格心态变化以及诗文研究等三个方面,而对于侯方域在晚明政治中的处境、其爱情与婚姻生活、侯氏家族与晚明战争的关系以及侯方域在南明政权下的游幕生涯等内容却关注不够,无论是研究角度、研究内容抑或是研究思路与方法,都值得进一步地深入探讨。     

论井冈山、中央苏区时期我党以民主监督推动反腐倡廉建设的基本经验

我党在井冈山、中央苏区时期就非常重视依靠民主监督的力量推动廉政建设，逐步形成了以民主监督制度为根本的反腐倡廉有效机制。党在井冈山、中央苏区时期以民主监督推动反腐倡廉建设的基本经验主要有：服从和服务于革命战争的需要；真正地贯彻群众路线；党的领导始终起着核心作用。     

中国古代淡水养殖鱼类苗种的来源和培育技术研究

我国淡水鱼类养殖历史悠久,最早可溯至距今3000多年前的殷商时期.早期池塘养殖主要是鲤鱼,因鲤鱼对生存环境要求不高,可以在封闭水体中自行繁殖,苗种较易获得.汉代出现的《范蠡养鱼经》是我国古代养鲤技术的集大成者,对鱼池建造、鱼苗种的放养、养殖密度等均有记载.至唐代中期,由于政治避讳,传统养鲤业一时衰落.此后,鲢、鳙、青、草“四大家鱼”及鲮鱼等淡水鱼类养殖兴起,由于古代这些鱼类均不能人工繁殖,它们的苗种主要依靠长江及珠江流域渔民捕捞获得,其苗种培育技术至宋代开始见诸记载,元明时期有较大发展,至清代基本成熟.而野生金鱼最早见于唐代文献,主要产自杭州、嘉兴地区,家养金鱼见于南宋文献,饲养技术至明清趋向完善.     

衡阳城市导向标识系统设计研究

文章对衡阳市导向标识系统存在的问题进行分析和总结,从交通导向识别系统、旅游休闲景区导向识别系统、商业导向标识系统三个方面对衡阳市导向识别系统的建设进行了探讨,以提升衡阳城市品质,凸显城市特色和魅力。     

Simplex Mixed‐Effects Models for Longitudinal Proportional Data

Abstract. Continuous proportional outcomes are collected from many practical studies, where responses are confined within the unit interval (0,1). Utilizing Barndorff‐Nielsen and Jørgensen's simplex distribution, we propose a new type of generalized linear mixed‐effects model for longitudinal proportional data, where the expected value of proportion is directly modelled through a logit function of fixed and random effects. We establish statistical inference along the lines of Breslow and Clayton's penalized quasi‐likelihood (PQL) and restricted maximum likelihood (REML) in the proposed model. We derive the PQL/REML using the high‐order multivariate Laplace approximation, which gives satisfactory estimation of the model parameters. The proposed model and inference are illustrated by simulation studies and a data example. The simulation studies conclude that the fourth order approximate PQL/REML performs satisfactorily. The data example shows that Aitchison's technique of the normal linear mixed model for logit‐transformed proportional outcomes is not robust against outliers.