Results 41 to 50 of about 116,687 (175)

基于IEC 60287和有限元法的高压海底电缆温度场分析方法

open access: yesGaoya dianqi, 2014
高压交联聚乙烯(XLPE)海底电缆结构复杂、敷设环境特殊,分析导体温度时需要考虑较多因素。笔者详细介绍了海缆分层及参数计算注意事项,参照IEC 60287标准进行计算,建立了海缆的精确热路模型,获得了海缆导体温度及各层温度的矩阵方程。采用有限元方法仿真了不同环境温度及负荷下的海缆温度场,环境温度在1424℃之间、电流在100500 A之间变化时,热路模型与有限元仿真获得的导体温度偏差小于0.3℃。仿真结果表明,热路模型得到的导体温度及各层温度关系的计算精度满足要求,且与外界环境温度无关 ...
段佳冰   +3 more
doaj  

ドジョウ ショウサン ノ コウドウ ニカンスルケンキュウ ダイ1ホウ : オンド ノ エイキョウ [PDF]

open access: yes, 1971
土壌に施用された水溶性の燐酸は,作物に吸収利用される以前に,その大部分は土壌に吸収され,水に不溶性となって,不可給態に変化する.このような変化の進行する程度・遅速は,燐酸が施用された土壌の性質や環境の条件等によって,甚だ大きな影響をうける.(中略)この土壌の燐酸吸収反応の平衡恒数は,その際の温度が上昇すると,これに伴ってその値も小さくなるので,この吸収反応は主として化学的反応であると推論されている.土壌の燐酸吸収量が温度の上昇に伴って増大するのであれば,低温度で土壌に施用された燐酸は ...
川嶋 次夫   +2 more
core   +1 more source

Highly Anisotropic TbCo11Ti: Phase Evolution, Microstructure and Magnetic Properties

open access: yesRare Metals, EarlyView.
ABSTRACT Among the 1:12‐type compounds, TbCo11Ti stands out due to its high Curie temperature and pronounced magnetocrystalline anisotropy. However, its magnetic behavior at room temperature and its phase evolution process have not been clearly established.
Wei Chen   +11 more
wiley   +1 more source

压敏电阻冲击老化过程中温度对静态参数影响分析

open access: yesDianci bileiqi, 2015
研究了冲击老化过程中温度对压敏电压和泄漏电流的影响。研究表明,压敏电压呈现弱的负温度特性。随着冲击次数增加,压敏电压与温度的相关性有增强趋势,而且压敏电压随温度变化的波动变得明显。泄漏电流受温度影响较大。随着温度上升,泄漏电流呈指数函数上升,具有较强的正温度特性,且随着冲击次数增加,正温度特性越强。
曹洪亮   +4 more
doaj  

Maxwell分布に基づく反応速度の温度依存性のシミュレーション [PDF]

open access: yes, 2019
A particle kinetic energy probability distribution eqn. (5) is lead from Maxwell distribution. Based on the eqn. (5), the proportion of number of the molecules bearing kinetic energy above a certain activation energy is calculated by two methods, and is ...
中島, 敏
core  

Bimetallic Mo/Fe‐Doped CoP2 Nanoleaf Array as a Bifunctional Electrocatalyst for Overall Water Splitting

open access: yesRare Metals, EarlyView.
ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng   +6 more
wiley   +1 more source

さつまいもの加熱調理直後、冷蔵保存及び再加熱によるレジスタントスターチ量の変化 [PDF]

open access: yes, 2019
Resistant starch(RS)escapes digestion until reaching colon and acts like dietary fiber. Recently,many studies suggest that RS, in addition to dietary fiber, may be beneficial for our health.
亀井 文, 高橋 遥
core   +1 more source

High‐Temperature Stable Narrowband Near‐Infrared Phosphor‐Converted Light‐Emitting Diode Based on Melt‐Grown CsPbCl3: Yb3+ Crystal

open access: yesRare Metals, EarlyView.
ABSTRACT Narrowband near‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) featuring low full‐width at half maximum (FWHM) and high conversion efficiency are crucial for chemical content evaluation, light therapy, and bioimaging.
Chunshen Li   +4 more
wiley   +1 more source

基于有限元分析的不同电压等级GIS隔离开关温度场仿真研究

open access: yesGaoya dianqi, 2018
GIS隔离开关部位容易引起热故障,研究温度场分布可为GIS温度监测提供参考。基于AnsysWorkbench有限元仿真软件,针对不同电压等级的GIS隔离开关,建立多物理场耦合仿真模型,计算分析实际工况下隔离开关的温度场分布。同时分析外界环境温度和风速对导杆温度及外壳温度的影响,结果表明:环境温度的改变能导致GIS温度近似线性变化;风速能改变外壳与空气之间的对流换热能力,风速的增大能相应地降低导杆和外壳温度,但温度下降的趋势越来越缓慢,散热效果也在降低,两者呈非线性关系。最后,利用外壳温升 ...
吴旭涛, 马波, 李秀广, 倪辉
doaj  

Influence of fluctuating temperature on incubation duration and hatchling phenotypes in the Chinese three- keeled pond turtle, Chinemys reevesii(波动温度对乌龟卵孵化期和幼体表型特征的影响)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2009
在28 ℃、(28 ±3) ℃和(28 ±6) ℃温度条件下孵化乌龟(Chinemys reevesii)卵,检测上述温度条件对孵化期、孵化成功率、幼体大小以及运动能力的影响.孵化温度显著影响乌龟卵的孵化期、幼体重量和背甲大小,但对孵化成功率和幼体运动能力无显著影响.恒温条件下卵的孵化期短于波动温度,恒温条件下孵出的幼体体重大于波动温度条件下的幼体.因此,与恒温相比,波动孵化温度并不提高乌龟幼体质量.
SHULin(舒霖)   +3 more
doaj   +1 more source

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