Results 51 to 60 of about 24,472 (211)

人工湿地强化脱氮系统运行条件优化研究 [PDF]

open access: yes, 2013
微生物的硝化与反硝化作用是人工湿地脱氮的主要途径,如何调控与优化湿地沿程溶解氧浓度和污水碳氮比,对于提高人工湿地脱氮效果至关重要。为此,在人工湿地前端埋设曝气管、后端增设碳源投加管,构建了一种人工湿地强化脱氮系统,并选择曝气速率、曝气运行/停止时间比、碳源投加量、进水方式进行正交试验,开展了人工湿地碳氧联合调控脱氮研究。结果表明,各因素的影响大小依次为:曝气运行/停止时间比>曝气速率>碳源投加量>进水方式;最优运行条件为:曝气速率为2.5 L·h-1,曝气运行/停止时间比为8 h/16 h ...
屈娟娟   +4 more
core  

Efficacy and Field Safety of Ilunocitinib for the Control of Allergic Dermatitis in Client‐Owned Dogs: A Multicenter, Double‐Masked, Randomised, Placebo‐Controlled Clinical Trial

open access: yesVeterinary Dermatology, Volume 36, Issue 6, Page 825-837, December 2025.
Background: Inhibition of the Janus kinase pathway is an established treatment for allergic dermatitis. Objective: To evaluate the efficacy and safety of ilunocitinib for control of pruritus in dogs with allergic dermatitis in a randomised, double‐masked clinical trial.
Sophie Forster   +5 more
wiley   +1 more source

Study on the recombinant probiotics expressing marine source metallothionein and its fermentation technology

open access: yes, 2016
随着科学技术的发展,重金属离子污染越来越严重,严重危及人类健康和安全。如何降低重金属对人体危害已成为目前亟待解决安全性问题之一。金属硫蛋白(MT)作为高效的天然解毒剂,一直是生物学与医学领域中基础研究和应用研究的热点之一,并在医学、化妆品、保健食品添加剂、环保等方面得到了广泛的应用。目前,国内市场上常见的MT多数是从兔肝脏中提纯,由于MT原料需求特别,MT原料来源已成为制约该领域发展的瓶颈之一。利用原核大肠杆菌作为表达宿主,采用基因重组和发酵技术是获得大量高纯MT的重要途径之一 ...
阎光宇
core  

Research and Design of Multi-Channel Temperature Control System for High Power LEDs Online Accelerated Aging [PDF]

open access: yes, 2016
半导体照明技术伴随时代的进步,应用愈发广泛,大功率LED照明领域更是逐步走向普及。但实际应用中,LED器件和封装的缺陷及工作时发热极大限制了其性能和实际寿命,可靠性问题日渐显露。为此LED寿命加速测试尤为重要,以实现寿命预测,失效机理分析,使得LED可靠性提升。常用的高温老化测试传统上使用高温试验箱,此方法存在诸多缺点:参数检测不连续、温升慢、体积大、功耗高。本文针对性地研制了一套轻便的LED在线寿命加速多路温控系统(以下简称温控系统)。主要工作内容与研究成果如下: 1.研制了温控系统的硬件部分 ...
周骁炀
core  

Building a culture of connection in early childhood education: The Hand in Hand Foundations Course

open access: yesInfant Mental Health Journal: Infancy and Early Childhood, Volume 46, Issue 6, Page 675-695, November 2025.
Abstract Healthy early childhood development unfolds in the context of relationships with important caregivers, including early educators. Grounded in the evidence on early relational health, the 8‐week Hand in Hand Foundations Course for Early Childhood Educators teaches a novel connection‐based approach to understanding and responding to young ...
Angela Sillars   +6 more
wiley   +1 more source

Research on trajectory planning method for food sorting robot based on machine vision and improved BOA [PDF]

open access: yes
ObjectiveReduce the trajectory running time, energy consumption, and operational impact of parallel robots during the food sorting process.MethodsBased on the analysis of the Delta parallel robot food sorting system, an improved 4-3-3-4 interpolation ...
CUI Wei, SUN Litao, WANG Wei, YUAN Rui
core   +1 more source

Synchronicity in Post‐Jungian Astrology: A Cosmological Quest

open access: yesJournal of Analytical Psychology, Volume 70, Issue 5, Page 808-824, November 2025.
Abstract Jung promoted the idea of synchronicity in 1928, in the context of discussing the Chinese way of thinking. From 1928 to 1951, Jung’s informal formulations led to more than one understanding of synchronicity. He even tried to apply synchronicity to an astrological experiment.
Jingchao Zeng, Nathan Fraikin
wiley   +1 more source

±800kV特高压直流换流站直流场多柱并联避雷器预防性试验研究

open access: yesDianci bileiqi, 2013
现行±800 kV特高压换流站避雷器预防性试验规程沿用了±500 kV常规直流避雷器的试验要求和基本方法,由于±800 kV特高压直流场避雷器采用了多柱并联的结构,而现行规程中对于这种并联结构避雷器预防性试验方法及结果判定并没有针对性的规定。本研究设计了3种试验方案,经过比较和模拟试验研究,最终选择整体试验方案作为多柱并联避雷器推荐预试方案,并提出基于整体试验方案的避雷器状态判定方法。采用此试验方法,在保证测试有效性的前提下,可减少预试工作量,并且在一定程度上减小了拆装过程对被试设备的损坏。
张曦   +8 more
doaj  

Establishment and Application of Cell Lines for the detection of dioxins [PDF]

open access: yes, 2016
二噁英是一类常见的持久性有机污染物,广泛存在于环境中。毒性作用剂量极低并且易于在生物体内富集,对环境和人体健康都具有很大的危害。环境中的二噁英组分复杂,对分析技术的特异性和灵敏度要求都非常高。 国际上公认的检测二噁英的HRGC/HRMS标准方法需要复杂的前处理,且费用昂贵,而应用生物检测手段检测二噁英类污染物也有很大的优势。本研究主要利用二噁英类化合物进入生物体内后,作为芳香烃受体(Aryhydrocarbonreceptor,AhR)的配体 ...
杜宏
core  

220kV金属氧化物避雷器不拆线试验方法及误差分析

open access: yesDianci bileiqi, 2006
介绍了220kV金属氧化物避雷器不拆除一次高压引线的试验方法,并对试验方法进行了误差分析,与常规试验方法进行了比较。结果表明,直流发生器的输出电流应选择大于3mA;试验前应对避雷器表面进行清洁,空气湿度大时,还应对避雷器表面进行屏蔽试验;试验时,应尽可能缩短高压引线的长度,并考虑引线与被试品的角度等;MOA底座绝缘电阻值应尽量大,可减少测量误差,得出不拆线试验方法是可行的。
万四维, 李顺尧
doaj  

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