Results 31 to 40 of about 1,236,037 (162)
A behavioral study of timing task in rats
, 2007 目的 观察大鼠对时间的感知过程中各种行为之间的关系,探讨操作动机对大鼠时间感知的影响.方法 采用断水24h的雄性SD大鼠执行时间反应分辨任务.在听到声音信号并完成鼻触行为之后,大鼠要踩压杠杆并保持4～5 s后松开杠杆,才能得到50μl水作为奖赏.若过早或过晚松开则没有奖赏.分析声音信号和鼻触行为之间的声音反应潜伏期及鼻触行为和踩杠杆之间的踩杠杆潜伏期与操作正确性之间的关系,以及这些潜伏期与保持踩压杠杆的时间(计时期,Timing)之间的关系.结果 在计时准确的操作中,声音反应潜伏期和踩杠杆潜伏期都比较短[
王锦琰, 罗非, 王宁, 张景渝
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Geographic risks to functional groups of mammals and birds from habitat loss in Mexico
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source
, 2014 亲社会行为和攻击行为是人类社会行为的重要组成部分。其中，亲社会行为是指个体发出的有利于他人、集体和社会的行为；攻击性行为是指有目的、有意图的伤害或试图伤害他人心理或身体状况及破坏其他目标的行为［1］。与个体从事其它活动一样，亲社会行为和攻击行为以神经生物学为牢固的基础。许多神经科学家在神经生物学方面积极探索人类社会行为的影响因子，亲社会行为和攻击行为的神经生物研究成为新的研究动向［2］。目前有关社会行为生化机制的研究主要关注激素和基因方面。虽然行为过程不能还原为大脑的神经过程 ...
朱莉琪, 林珠梅
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Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 5, Page 679-683, May 2026.ABSTRACT ObjectiveTo determine the diagnostic performance of each additional step of the four‐step International Deep Endometriosis Analysis (IDEA) consensus protocol for predicting the presence of deep endometriosis (DE) on transvaginal ultrasound. MethodsThis was an international multicenter observational cohort study of data collected prospectively ...
P. McClenahan +18 more
wiley +1 more source
大剂量甲氨蝶呤治疗对急性淋巴细胞白血病儿童智力与行为影响的研究
Zhongshan Daxue xuebao. Yixue kexue ban, 2002 【目的】探讨采用大剂量甲氨蝶呤(MTX)预防性治疗中枢神经系统白血病(CNSL)对急性淋巴细胞白血病 (ALL)儿童智力与行为的影响。【方法】①按“ 中国-比内智力测验手册” 方法对42 例ALL 患儿在治疗前后与40 例正常儿童 进行测试比较;②根据自制行为量表对ALL 患儿治疗前后进行行为比较。【结果】①ALL 患儿治疗前IQ 、行为与对照组无差 异(P >0.05), 而治疗后IQ 明显低于对照组, (P
王清文 +5 more
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Topics as Outcomes: Modeling the Influence of Intergovernmental Grants on Policy Diffusion
Policy Studies Journal, Volume 54, Issue 2, May 2026.ABSTRACT Intergovernmental grants stimulate the diffusion of policy reforms, as the federal government provides states with a financial incentive to adopt policies aligned with federal priorities. Less is known about the extent to which these grants also stimulate horizontal diffusion across states.
NaLette Brodnax, Sarah James
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, 2013 研究了钛合金显微组织对其高周,超高周疲劳行为的影响。采用α+β双相钛合金TC4为实验材料,通过不同的热处理工艺,得到了3种不同初生α相比例(90%,60%,40%)的试样,采用旋转弯曲疲劳试验机对试样进行高周与超高周疲劳实验,得到S-N曲线,并利用扫描电镜对疲劳断口进行了观察。结果表明 ...
孙成奇 +4 more
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Auto-focus technology and its application based on image processing
, 2009 Auto-focusing technique is an important method to improve the precision,intelligentization,automatization for the indentation diameter measurement.The paper introduces an auto-focus method of indentation diameter measurement based on image processing ...
Chen, Xiaomei, Yang, Tao, Zuo, Yong
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The Inclusion Trade‐Off: Comparing the Design and Functionality of Collaborative Governance Forums
Policy Studies Journal, Volume 54, Issue 2, May 2026.ABSTRACT Environmental challenges require collaboration across jurisdictions, often through forums or intermediary spaces for repeated interaction. A persistent forum design question concerns inclusion criteria, or which actors should be included.
Adam Wiechman +3 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Additively manufactured AlCoFeNi series eutectic high‐entropy alloys (EHEAs) exhibit nonequilibrium dual‐phase microstructure in the as‐printed state, allowing them to be easily tailored through annealing to explore their strength–toughness potential.
Huidong Wu +13 more
wiley +1 more source