Results 1 to 10 of about 4,165 (122)

Rapid assessment of insect pollination services to inform decision‐making

open access: yesConservation Biology, Volume 36, Issue 4, August 2022., 2022
Abstract Pollinator declines have prompted efforts to assess how land‐use change affects insect pollinators and pollination services in agricultural landscapes. Yet many tools to measure insect pollination services require substantial landscape‐scale data and technical expertise.
Fabrizia Ratto   +15 more
wiley   +1 more source

Research on Chinese Question‐Answering for Gaokao Based on Graph

open access: yesMathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020
Reading comprehension Question‐Answering (QA) for College Entrance Examination (Gaokao in Chinese) is a challenging AI task because it requires effective representation to capture complicated semantic relations between the question and answers. In this paper, a novel method of Chinese Automatic Question‐Answering based on a graph is proposed.
Zhizhuo Yang   +5 more
wiley   +1 more source

Study on the calculation method for molecular volume of chemical compounds(化合物分子体积计算方法的研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2003
本文提出了一种计算化合物分子体积的有效方法,在确定化合物分子构象的基础上,将随机变量的统计方法引入计算体系,可以计算出化合物任一构象条件下的分子体积.比较计算结果可知,我们的方法与同类其他计算方法同等精确,但算法的简捷、快速显得更为优越.在将我们的方法计算的化合物的分子体积用于化合物的结构-性质相关性研究时发现,分子体积能较好地表征化合物的结构特征.
GUOMing(郭明)   +4 more
doaj   +1 more source

The application of simplify decomposition maps in calculating Boolean e-derivative(简化分解图在计算布尔e-导数中的应用)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2013
为简化与-或-非代数系统中一阶和n阶布尔e-导数的计算过程,提出了一种基于简化分解图的新方法.该方法通过计算简化分解图相应列的与运算得到一阶布尔e-导数,n阶布尔e-导数通过计算倒置简化分解图来得到.该方法同样适用于含任意项逻辑函数一阶和n阶布尔e-导数的计算.应用实例表明该方法具有直观、简单等特点.
LIXiao-hua(厉晓华)   +1 more
doaj   +1 more source

Analysing continuous proportions in ecology and evolution: A practical introduction to beta and Dirichlet regression

open access: yesMethods in Ecology and Evolution, Volume 10, Issue 9, Page 1412-1430, September 2019., 2019
Abstract Proportional data, in which response variables are expressed as percentages or fractions of a whole, are analysed in many subfields of ecology and evolution. The scale‐independence of proportions makes them appropriate to analyse many biological phenomena, but statistical analyses are not straightforward, since proportions can only take values
Jacob C. Douma   +2 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

The K-map method for calculating c-derivative of Boolean function with don't-care-terms(计算含无关项布尔c-导数的K图方法)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2016
为简化与-或-非代数系统中含无关项逻辑函数布尔c-导数的计算过程,从逻辑函数布尔c-导数的定义出发,提出了计算含无关项一阶布尔c-导数和二阶布尔c-导数的K图方法.该方法通过折叠映射K图中的填入格值,并对相应格值进行“或”运算以计算含无关项布尔c-导数.应用实例表明,该方法直观有效,且能直接得到布尔c-导数的最简与/或式.
LIXiaohua(厉晓华)   +1 more
doaj   +1 more source

A new technique for analysis of synchronous counters constructed with flip-flops(分析由触发器构成的同步计数器的一种新方法)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2011
为了简化由触发器构成的同步计数器的分析过程,提出一种简单、有效的方法.采用该方法,由计数器的逻辑电路图获得状态转移方程后,将其化成标准与或表达式,通过推导得出标准与或表达式中逻辑函数取值的规律,按照该规律,状态转移方程中次态值可直接由标准与或表达式得到,而不需要进行任何逻辑运算.通过对1个3变量计数器的分析表明,该方法省去了烦琐的计算,使得次态值的求取和真值表的创建更加快捷、方便.
YANDan-gui(严单贵)   +1 more
doaj   +1 more source

Design of ECL flip-flop based on threshold-arithmetic algebraic system(基于阈算术代数系统的ECL触发器设计)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2014
针对ECL触发器设计中存在电路结构复杂、设计过程繁琐等不足,在分析ECL电路特点和阈算术代数系统的基础上,设计出一种ECL算术运算单元电路,进而提出了基于阈算术代数系统的ECL触发器的设计方法,具体设计了 ECL二值主从型D触发器、ECL三值D锁存器以及ECL三值T触发器置数单元.采用TSMC 0. 18 µm工艺参数对所设计的电路进行HSPICE模拟,结果显示,所设计的电路具有正确的逻辑功能和良好的瞬态特性,验证了本方法的正确性.与以往的ECL触发器电路相比,本方法设计的ECL触发器电路结构有所简化 ...
YAOMaoqun(姚茂群)   +1 more
doaj   +1 more source

New method of solving assignment problem—target value submatrix method(指派问题新解法——目标值子矩阵法)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2010
针对0-1整数规划中的传统指派问题,由工程实践问题提出了 一种全新的解法——目标值子矩阵法.对于n个变量的传统指派问题,一般只需n次运算即可找到最优解,简单易懂,与全枚解法和其他隐枚解法相比,极大地降低了计算量.如果把这种方法应用在计算机中,将使编程简化,计算次数减少,运算速度大为提高.
ZHAOHong-gang(赵洪刚)   +3 more
doaj   +1 more source

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