Results 41 to 50 of about 22,393 (164)

亚洲象血常规指标的测定与分析

open access: yes野生动物学报, 2017
为掌握和分析亚洲象血常规指标,保护亚洲象提供基础数据,我们对亚洲象血常规进行了测定和分析。空腹采集亚洲象血液21份(雄性13头,雌性8头),用XS-800i血液分析仪测定血常规数据,获悉的数据经统计学分析,比较雄性和雌性的数据差异。经血液分析仪测定的血常规数据,通过相关性分析,数据中红细胞平均体积、平均血小板体积、大血小板比率雌雄亚洲象有显著性差异(P0.05)。
保明伟 李德荣 许定泽 包战天 袁飞洲 熊朝永 白春兰 孙晓燕
doaj  

The Performance-based Seismic Design Of Tall Frame-Tube Wall Structure Based On Yield Mechanism [PDF]

open access: yes, 2016
随着科技和经济的发展,对于高层建筑结构的抗震设计提出了更高的要求,从以往的单纯满足规范要求的指令式的设计方式,转变为满足不同抗震性能要求的设计方式,特别是抗震性能设计思想被引入规范之后,针对高层超限结构往往需要进行性能设计。但现在的性能设计主要还是停留在构件层次,即小震、中震、大震下对应结构构件应该达到怎样的性能目标,这往往使结构性能设计仅局限于构件层次。而从屈服机制角度来探讨结构的抗震性能,实际将构件层次与整体结构层次连系起来,使得结构整体性能目标的确定更加明确,而且更易于构件控制 ...
陈家伟
core  

Advancing Water Security in the Tropical and Subtropical Regions: An Integrative Topic Modeling Approach

open access: yesWorld Water Policy, Volume 12, Issue 1, February 2026.
ABSTRACT Water security in tropical regions faces escalating pressures from climate change, land‐use shifts, and population growth. We conducted a bibliometric review of 1146 peer‐reviewed articles (1964–2023) on tropical water security. Latent Dirichlet Allocation identified 13 thematic topics and their evolution. Publications rose sharply after 2012,
Karling Fernanda Schuster   +3 more
wiley   +1 more source

Research on Key Technology of Grinding for Screw Rotor Profile [PDF]

open access: yes, 2015
双螺杆压缩机具有工作可靠、适应性强、易于操作维护和多相混输等优点,被广泛应用于汽车、压缩机、制冷机、矿山机械、动力机械等工业领域。双螺杆压缩机的核心部件是一对相互啮合的螺杆转子,螺杆转子加工质量是保证双螺杆压缩机性能及能效的关键,提高转子加工精度有利于降低其能耗,对节能减排具有非常重要的意义。随着现代机械设计制造技术的发展,出现了一批专用的数控螺杆转子加工设备及其配套软件,但其核心技术仍由国外掌握。我国在这一研究领域还处在刚起步阶段,与世界领先技术相比还有很大差距,且由于欧美等发达国家的技术封锁 ...
沈志煌
core  

SWEET1‐mediated glucose transport is crucial for energy availability in Arabidopsis

open access: yesNew Phytologist, Volume 249, Issue 4, Page 1816-1830, February 2026.
Summary The stress‐responsive hormone abscisic acid (ABA) is known for its inhibitory effects on various physiological processes, including seed germination, often resulting in energy deprivation. Interestingly, ABA‐induced germination inhibition can be alleviated by exogenous glucose (Glc), mimicking a functional interplay between ABA and sugar ...
Xueyi Xue   +3 more
wiley   +1 more source

The study of Foundation Treatment and Reinforcement Technology in Double Happiness Island [PDF]

open access: yes, 2017
漳州招商局经济技术开发区的双鱼岛项目是在浅滩填筑形成的人工岛屿。项目呈圆形,半径850米,规划面积约222公顷,填海形成的陆域面积约182公顷。项目位于浅海滩涂地带,吹填的材料流动性大,地基软弱,因此地基处理是项目的关键技术问题。 论文系统地分析堆载预压处理工艺结合塑料排水板处理法和强夯法两种地基处理技术,结合双鱼岛项目的工程实际,将理论研究与工程实践相结合,深入研究并提出地基处理与加固技术设计方案与实施工艺技术。论文系统的论述了项目的设计、施工、检测的各个环节,同时结合FLAC3D软件进行数值分析 ...
徐广富
core  

Dual‐Rare‐Earth‐Doped Piezoelectric Semiconductor Gallate Solids With Spectral Tuning for Energy Conversion and Photonic Applications

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Mechanoluminescent materials have gained significant attention for their unique capability to convert mechanical stimuli into light without external optical or electrical excitation, holding immense promise for applications in safety monitoring, biomedicine, optical anti‐counterfeiting, and intelligent sensing.
Fanlei Qin   +8 more
wiley   +1 more source

Advance Selling with Speculators [PDF]

open access: yes, 2016
近年来随着科技日新月异的进步发展,消费者的需求表现出日益多样化的趋势。厂商必须不断发布新产品来迎合市场的需要。但是新产品的需求往往具有很大的不确定性。 而产品预售可以揭示未来市场需求,降低库存水平。因此预售作为一种重要的营销手段,越来越受到厂商的重视。但是在互联网时代下,消费者获取信息的能力大幅加强,进行购买决策时表现出更强的策略性。另一方面,网络极大地减少了二手商品的交易成本,投机者得以更加便利地转售商品。这都增加了厂商预售的难度。基于以上现实,本文建立了一个由垄断厂商、消费者和投机者组成的市场模型 ...
王晨鉴
core  

Endometrial assessment in abnormal uterine bleeding: transvaginal ultrasound alone may not be good enough

open access: yesUltrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 79-88, January 2026.
ABSTRACT Objective To evaluate the proportion of optimal assessments of endometrial thickness (ET) achieved by transvaginal ultrasound (TVS) compared with a multimodal (MM) sonographic approach in women with abnormal uterine bleeding (AUB). Methods This prospective observational study was a subset of the EPI‐SURE study conducted between June and ...
S. Nijjar   +5 more
wiley   +1 more source

Q460高强钢焊接H形柱轴心受压力学性能数值分析

open access: yesJianzhu Gangjiegou Jinzhan, 2013
为了考察国产Q460高强钢焊接H形柱的轴心受压力学性能,对6个已有焊接H形柱的轴心受压试验进行了数值分析。数值分析采用作者编制的数值积分法电算程序和通用有限元软件ANSYS。以考虑了实测初始挠度、初始偏心及简化残余应力分布的数值模型,计算Q460高强钢焊接H形柱轴心受压的极限承载力与荷载-挠度曲线。发现数值积分法与有限单元法所计算试件的荷载-挠度曲线基本重合。为了验证数值模型的准确性,将数值分析结果与已有试验结果进行对比;并通过对比简化残余应力分布模型与实测残余应力分布对试件极限承载力、荷载 ...
王彦博   +3 more
doaj  

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