Results 21 to 30 of about 14,950 (229)

Improved sub-band JND model with textural decomposition and its application in perceptual image coding [PDF]

open access: yes, 2014
In order to improve the accuracy of the just noticeable difference (JND) model in transform domain, an en-hanced JND model with a new method for contrast masking factor estimation was proposed. The image was decomposed and the textural image was used for
Cheng-dong LAN   +4 more
core   +1 more source

基于深度可分离卷积网络的皮肤镜图像病灶分割方法

open access: yes智能科学与技术学报, 2020
针对皮肤镜图像病灶难定位、病灶精准分割难以实现的问题,提出一种基于深度可分离卷积网络的皮肤镜图像病灶分割方法。首先对皮肤镜图像进行黑框移除和毛发移除处理,将图像中有碍确定病灶位置的人工噪声、天然噪声移除;然后在降噪处理的基础上,对图像进行形变、旋转,以扩充数据集;最后构建基于深度可分离卷积、空洞卷积的编解码分割模型,编码部分对图像进行特征提取,解码部分融合特征图,并对图像细节特征进行恢复。实验结果表明,该方法针对皮肤镜图像病灶分割问题可取得较好的分割效果,分割病灶的准确率达到95.24%,与分割模型U ...
崔文成, 张鹏霞, 邵虹
doaj  

An image fusion method based on feature decomposition(一种基于特征分解的图像融合方法)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2018
一幅图像可以分解成几何特征不同的纹理部分和卡通部分,基于这两大特征提出了 一种图像融合方法. 利用卡通和纹理特征的差异,通过学习分别得到卡通字典和纹理字典.在融合过程中,分别利用特定的卡通和纹理字典对源图像的卡通和纹理部分进行融合,融合后的卡通和纹理部分经简单相加得到融合图像.实验结果表明,所提方法是有效的.
CHANGLihong(常莉红)
doaj   +1 more source

Evaluating protected areas’ coverage of threats to terrestrial biodiversity

open access: yesConservation Biology, EarlyView.
Abstract Protected areas (PAs) are vital for biodiversity conservation and have expanded globally. However, increasing pressures on biodiversity make it difficult to achieve conservation goals. Using threat probability maps based on the International Union for Conservation of Nature Red List and the World Database of Protected Areas, we analyzed the ...
Katherine Pulido‐Chadid   +2 more
wiley   +1 more source

The Application of Schedule Management in a Local Tax Promotion of the Golden Tax Project(Phase III) [PDF]

open access: yes, 2016
近些年随着社会经济的快速发展,各类企业数量大幅增加、企业类型及经营模式越来越多样化,引发税收核算算法日益复杂,传统的税收征管模式已经无法满足社会形势发展的要求。福建省某地税作为“金税三期工程”省级应用集中优化版的第四批计划上线单位,计划于2016年3月1日开始与现有征管系统双轨试运行,2016年5月1日新系统正式单轨上线。项目在面临时间紧、任务重、相关干系单位多、政策法规变动风险等种种不利因素的影响下,如何保证项目按期保质保量的平稳上线成为了本次项目管理的难点。 本文针对上述难点 ...
石静
core  

Exploring the Direct and Indirect Relations of E‐Book Narration and Bilingual Parent–Child Talk to Children's Learning Outcomes in EFL Shared Reading

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT E‐books, powered by multimedia and interactive features, are widely used to support young children's language and literacy development. This study examines the relations of e‐book narration and bilingual parent–child talk to children's learning during shared reading. Data from 121 English learners in China and their parents were analyzed using
Dandan Yang   +3 more
wiley   +1 more source

有机化合物中原子氧化数的确定和氧化还原反应方程式配平的方法 [PDF]

open access: yes, 1997
众所周知,氧化还原反应是化学反应中一类常见且又重要的反应.而有机氧化还原反应配平是对研究和定量计算有机反应有着重大的作用.一般来说,有机化学中的氧化反应是指有机物脱氢或得氧的过程;还原反应是指加氢失氧的过程.然而有些有机反应的氧化还原反应并不涉及氢氧得失,所以,必须从本质上认识氧化还原反应的本质.氧化还原反应实际上是一个电子得失(或称电子转移)的过程.由于有机的价键一般是共价型,因此这种电子得失相对于有机物讲只是部分得失,表现就是化合物中某元素的氧化数反应前后发生的变化.例r ...
林银钟
core  

Study on the non-isothermal decomposition kinetics of AlOOH coated calcium carbonate(羟基氧化铝包覆碳酸钙热分解非等温动力学研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2008
在鼓泡碳化法制备的普通及纳米碳酸钙表面包覆上一层羟基氧化铝,根据差热热重分析实验数据,采用master-plot标准作图法和经典动力学机理方程确定了碳酸钙的分解机理并求取相应动力学参数.普通碳酸钙包覆后分解机理由R2变为D1,纳米碳酸钙包覆后分解机理由R3变为R2.用微分和积分方法验证活化能得到很好的一一对应结果.对包覆二元复合物特殊的热分解动力学行为做了初步解释.
ZHANGHui-zhu(张惠珠)   +2 more
doaj   +1 more source

Patriotic rabbits or toxic men? Media ideology, entextualization, and enregisterment on Chinese interfaces

open access: yesJournal of Linguistic Anthropology, EarlyView.
Abstract This article argues that social actors' media ideologies about digital interfaces are key to the enregisterment of online activities. Focusing on an online register emergent from user activities around Year, Hare, Affair (YHA)—a state‐aligned Chinese animation—I explore how different metadiscourses evaluate this register by entextualizing ...
Jiarui Sun
wiley   +1 more source

The Analysis and Design of Distribution Information System of Company C [PDF]

open access: yes, 2013
C公司是一家润滑油制造和销售的跨国公司。近年来,由于垄断国企的存在和其他跨国公司的进入,C公司所面临的市场竞争也越发激烈。如何能够提供及时快速的物流服务来响应客户需求,是事关C公司市场地位的紧要问题。而加强企业信息化的建设、开发一套适合企业自身的物流信息系统,不但能够提高公司物流运作的效率进而赢得客户满意,还能够降低成本,使公司在激烈的竞争中赢得优势。 本文在考察C公司物流现状和信息系统现状的基础上,通过业务流程分析和价值流图分析对C公司当前信息系统进行问题分析和总结。在此基础上 ...
肖湘
core  

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