基于数据挖掘方法的皮肤病诊断建模     

邵峰峰 《环球赛鸽科技》2015,(12)

临床特征和组织病理学特征在皮肤科疾病分类问题中起着非常关键的作用。本文的主要目的是使用这些特征建立皮肤科疾病分类模型。本文首先使用最大相关最小冗余方法选择相关特征,然后使用支持向量机构造分类模型。文中所使用的数据集包含358皮肤病患者病例样本和35属性。通过实验比较使用特征选择方法前后的模型分类精度可知,使用特征选择方法能明显提升模型分类性能。同时,本文通过实验研究对不同年龄段的皮肤科疾病患者分类的差异性,并选择出了对于35岁以下皮肤科疾病患者分类重要的13个特征以及35岁以上患者分类重要的9个特征。  相似文献   

英国高校科研经费“双重资助体系”研究及思考     

王敏  张国兵 《科技管理研究》2015,(24)

英国政府对高校的科研资助在长期实践中形成了以"高等教育拨款委员会拨款"及"研究委员会拨款"为主体的双重资助体系,形成了以决策分权化、完全经济成本补偿、创新科研评估制度为特征的政府资助高校科研管理体制。论文从比较研究的视角,对我国高校科研经费管理的实践进行相应的反思。  相似文献   

中国大陆地区2014年高校慕课课程建设情况调查   总被引：1，自引：0，他引：1  

崔璨  刘玉  汪琼 《中国电化教育》2015,(7)

为了了解中国大陆地区高校对于慕课建设和利用的态度,特别是已经行动的高校的计划和定位,作者对中国大陆地区32所已经建设慕课且已经开展慕课教学的高校相关校级领导和项目主管人员进行了网络问卷调查,对调查结果进行了描述性统计分析,且与美国相关报告进行了同类数据对比。研究发现,大陆地区高校在慕课建设策略上有许多类似的地方,在慕课建设动机与定位方面与美国高校存在较大差异。最后,我们对部分高校的做法进行了点评,就高校建设慕课过程中可能出现的问题如何通过政策防范,做出了提醒。  相似文献   

A Classroom Exercise to Examine the Trade‐off between Mission Capacity and Life Cycle Cost          下载免费PDF全文

Keebom Kang  Kenneth H. Doerr 《Decision Sciences Journal of Innovative Education》2015,13(1):3-20

This article presents a classroom exercise, centered on a simulation that has been used for 4 years in an MBA program to help students develop an understanding of the trade‐offs involved in managing capital assets in the public sector. Though often ignored in business schools, mission is a key criterion that must be considered when managing such assets, and acts as a surrogate for profit. The case presents a rich environment in which the impact of cost reductions (or additional investments) on mission can be quantified, and trade‐offs can be assessed and discussed. It gives students a chance to develop creative ideas for process improvement, and provides sufficient data for them to analyze the impact of their suggestions in a rigorous way.  相似文献   

The roots of reading for pleasure: Recollections of reading and current habits     

Manzar Zare  Stephanie Kozak  Monyka L. Rodrigues  Sandra Martin-Chang 《Literacy》2023,57(3):262-274

Children's early literacy experiences are critical, yet it remains unclear whether memories of early reading instruction continue to be associated with reading habits into adulthood. We examined the association between recollections of reading experiences and present-day reading habits in an adult population. University students responded in writing to three open-ended prompts asking about their memories of reading during early childhood, elementary school and high school. They also completed two questionnaires inquiring about reading enjoyment and frequency in elementary school and high school. For the concurrent measures of reading, participants described their current reading habits in an open-ended prompt and completed an author recognition test. Results showed positive links between favourable memories of reading during elementary and high school years and present-day reading habits. Conversely, unfavourable memories during high school were associated with unenthusiastic present-day reading habits. We found that reading instruction in school forms long-lasting memories, and these memories are linked in meaningful ways with print exposure during adulthood.  相似文献   

江西农信对接财政支付电子化管理的探析     

王瑛  谢步升 《科技广场》2014,(9)

财政国库集中支付电子化管理是以信息技术为基础,覆盖所有财政资金,协调各参与方,操作规划、安全可控和高效便捷的无纸化运行体系,是当前我国财政信息化建设的一项重要内容。本文对江西农信对接财政国库集中支付电子化管理进行了深入探析。首先讨论江西农信实现对接的重要意义,其次介绍财政部会同人民银行统一规划设计开发的电子支付安全支撑体系,再从网络架构和业务流程两方面详细说明如何实现对接,最后简述江西农信在这方面的准备工作。  相似文献   

绿色创业政府扶持体系研究     

崔祥民  杨东涛 《科技管理研究》2016,(12)

基于绿色创业理论,对光伏、节能照明、新能源汽车三行业的案例分析,发现只有遵循绿色创业规律的政府扶持才能真正促进绿色创业企业发展。技术创新是政府扶持绿色创业的首要任务,绿色创业与绿色消费的平衡发展是政府扶持的重要任务,“推拉结合”是绿色消费政府扶持的重要手段。要提升政府扶持的有效性,扶持的力度要适中,扶持的对象要审核。  相似文献   

三维表面微观形貌的等高图绘制及粗糙度3-D评定参数计算方法研究     

陈小岗  刘远伟  孙全平 《中国科技信息》2006,(20):281-284

针对零件表面质量的要求愈来愈高，而机加工表面微观形貌的粗糙度3-D评定方法却相对滞后。针对这一问题，本文就三维表面微观形貌的等高图的绘制方法、粗糙度3-D评定参数的计算提出了一些具体编程实现方法。重点阐述了三维表面等高图的绘制方法、3-D支承率和液体滞留性能指数的计算方法。利用JB-4C测量仪，开发了粗糙度3-D评定参数计算系统，验证了该方法的可行性。  相似文献   

一种新式背负型支撑装置的结构设计     

唐际杰  林锋 《大众科技》2016,(3):41-43

随着武器装备的小型化,便携式装备应用越来越广,进而对便携式装备的体积、重量等指标方面的要求也越来越高。在单兵背负便携设备进行作战架设时,结构巧妙的支撑装置会给整个系统的背负、架设、撤收带来较好的实战效果。文章从支撑装置的选材、结构形式、功能等方面加以阐述,体现了该结构设计的新颖与实用性。  相似文献   

Researching Internet Communities: Proposed Ethical Guidelines for the Reporting of Results   总被引：4，自引：0，他引：4  

Storm A. King 《The Information Society》1996,12(2):119-128

Communication researchers and social scientists are quickly discovering the value of data that exists in the postings of members of Internet e-mail, Usenet, and real-time groups. The ability to communicate with one's peers, no matter how esoteric the interests, is causing an explosion in the number of new virtual communities. The interpersonal dynamics of these groups are increasingly coming under the scrutiny of academic research. The publicly available archived records of Internet virtual communities are being analyzed for a wide variety of research interests. The ability to do naturalistic observations of group dynamics, as they are exhibited in these exchanges of text, has captured the attention of many researchers. The institutional review boards of major universities are granting researchers exempt or expedited (exempt from full review) status for this work, due to the public nature of the notes being analyzed. These studies often involve the lack of informed consent, where the group members under study are unaware they are being monitored. There is a potential for psychological harm to the members of these groups, depending on the way results are reported. This article explores the ethical considerations that must be taken into account to protect cyberspace participants. The guidelines proposed are based on the American Psychological Association ethical guidelines for use of human subjects in research. An explanation is offered as to how such guidelines can best be applied to the study of Internet communities. The constructs of Group Accessibility (the public/private nature of the actual cyberspace occupied by a group) and Perceived Privacy (the level of privacy that group members assume they have) are defined and proposed as two dimensions by which individual Internet communities may be evaluated in order to assure the ethical reporting of research findings.  相似文献