Results 11 to 20 of about 4,462 (152)

idopNetwork: A network tool to dissect spatial community ecology

open access: yesMethods in Ecology and Evolution, Volume 14, Issue 9, Page 2272-2283, September 2023., 2023
Abstract Network models have been used as a tool to characterize internal workings of complex systems. The amount of topological and functional information extracted from a network depend on the method of network inference and the type of network data.
Ang Dong   +4 more
wiley   +1 more source

Relationship between creatinine to body weight ratios and diabetes mellitus: A Chinese cohort study 肌酐体重比与糖尿病的关系:一项中国队列研究

open access: yesJournal of Diabetes, Volume 14, Issue 3, Page 167-178, March 2022., 2022
Highlights In Chinese adults, creatinine to body weight ratio is inversely associated with diabetes risk, and the relationship is nonlinear. Those who have diabetes risk factors and have low creatinine to body weight ratio should be vigilant against the occurrence of diabetes.
Zhuangsen Chen   +6 more
wiley   +1 more source

International clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder – Chinese (Mandarin) translation

open access: yesDevelopmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019
目的 本国际临床指南由欧洲残疾儿童学会(the European Academy of Childhood Disability,EACD)牵头制定,旨在解决发育性协调障碍(developmental coordination disorder,DCD)的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题,通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础,以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类,最终转化为指南建议。并由国际 ...
Jing Hua   +6 more
wiley   +1 more source

Optimization Algorithm of Correlated Color Temperature for LED Light Sources by Dichotomy [PDF]

open access: yes, 2009
色温和相关色温是lEd光源的重要参量。从原始光谱数据到色品坐标(u,V)再到色温和相关色温的计算过程相当复杂,需要一种优化算法来简化计算量。因此,从色温的色度学定义出发,简要分析了直接内插法、逐点法和函数曲线拟合法三种色温计算的经典算法,并分别指出了它们的优缺点,在此基础上提出了二分法这种新的色温优化算法。详细介绍了二分法的基本思想、程序流程等。利用软件编程实现这几种算法,通过普朗克黑体辐射公式计算得到一系列色温的理论光谱和白光lEd仪器实际测试光谱,对比二分法和各种经典算法的速度和结果 ...
刘文杰, 叶烈武, 吕毅军, 林岳
core   +1 more source

基于Fisher-Pry模型的纤维素预处理技术成熟度分析 [PDF]

open access: yes, 2018
为了研究纤维素预处理技术成熟度情况,基于多源文献数据利用 Fisher-Pry 模型对蒸汽爆破法、酸处理法、碱处理法和生物法等主要预处理技术成熟度进行了研究。结果表明,蒸汽爆破法、酸预处理法及碱预处理法从 2005 年之后快速展,目前基本处于成熟阶段,但由于这些方法本身存在水解产生抑制性产物、腐蚀性、成本高等缺陷,很难取得进一步的突破。生物法目前还正处于快速成长阶段,具有很大的前景,经过 Fisher-Pry 曲线拟合,预计生物法到  ...
吴新年   +4 more
core   +1 more source

Use of bird‐borne radar to examine shearwater interactions with legal and illegal fisheries

open access: yesConservation Biology, Volume 38, Issue 3, June 2024.
Abstract Seabirds interact with fishing vessels to consume fishing discards and baits, sometimes resulting in incidental capture (bycatch) and the death of the bird, which has clear conservation implications. To understand seabird–fishery interactions at large spatiotemporal scales, researchers are increasing their use of simultaneous seabird and ...
Leia Navarro‐Herrero   +5 more
wiley   +1 more source

Detection Method for Acoustic Signal and Signal Characteristic Analysis for Clicks of Dolphin [PDF]

open access: yes, 2016
海豚是一种水生鲸目哺乳动物,它们利用自身强大的声呐系统收发声信号进行各种生命活动,一般根据信号功能和参数的不同可以把海豚声信号分为三大类:通讯信号(Whistle)、回声定位信号(Click)、和应急突发信号(BurstPulse)。Whistle信号是一种频率随时间变化的调频信号,它的频带较窄,信号持续时间从几百毫秒到几秒之间不等,主要作用于海豚个体或群体之间的互相联络、情感表达、信息传递等;Click信号是一种宽频脉冲信号,主要作用于导航、定位、觅食、回避敌人等 ...
孙馨喆
core  

基于静态伏安特性曲线的ZnO电阻片耐受能量计算等效性研究

open access: yesDianci bileiqi, 2022
为了模拟计算ZnO电阻片在避雷器组限制过电压过程中吸收的能量,笔者针对所选取的电阻片进行冲击电流试验;绘制了在不同电流波形下的静态伏安特性曲线,描述了其与电阻片实际伏安特性的关系,并统计了同批次电阻片伏安特性分布规律;通过曲线拟合的方式建立伏安特性方程进行吸收能量的模拟计算。结果显示,在耐受冲击电流的过程中,电流波形波头时间对电阻片吸收能量计算等效性影响最大,波头时间越长,电阻片所表现出的伏安特性越接近试验绘制的静态伏安特性曲线,即通过静态伏安特性曲线进行能量模拟计算等效性越好。
刘志远   +6 more
doaj  

Dolphins whistle contour automatic extraction and recovery [PDF]

open access: yes, 2015
海豚是一种高智商的水生哺乳动物,它们使用自己独特的“语言”——哨声来进行互相交流。要想理解海豚的语言,就必须要对海豚哨声进行分析研究。当前对海豚哨声的分析研究大多是基于哨声语谱图进行的,但语谱图中哨声轮廓与背景噪声混合在一起,不仅导致目前对哨声的分割、提取等预处理都是用人工方式进行,同时也给后续的实验造增加了难度。如果对语谱图中的哨声轮廓进行去噪、特征提取和修复等自动化预处理,就能实时进行海豚哨声与背景噪声的分离,获得一个完整的海豚哨声轮廓。这不仅节约了人工提取花费的时间,也有利于海豚哨声的个体识别 ...
吴道曦
core  

Experimental study on the influence of middle and low rank coal functional groups on coal wettability [PDF]

open access: yes, 2023
Coal seam water injection can effectively inhibit gas gushing in the process of coal mining, and its inhibition effect mainly depends on the wetting characteristics of coal seam.
Dongjie YAN   +6 more
core   +1 more source

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