Results 21 to 30 of about 6,540 (147)
Zhongguo shiyan zhenduanxue, 2009 目的探讨解脲支原体,精液白细胞与精子密度的关系。方法对275例男性不育患者精液样本进行分析,解脲支原体采用培养法进行检测,白细胞采用联苯胺染色方法进行检测,精子密度检测采用计算机辅助系统进行分析。结果UU阳性率为31.64%,白细胞阳性率为22.55%。UU阳性组精子密度显著低于UU阴性组 ...
孙忠凯 +5 more
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夜间135.6 nm气辉反演的电离层
Kongjian kexue xuebao, 2023 在夜间电离层，气辉135.6 nm谱线主要由F层的O+和电子的辐射复合过程以及O+和O–的中性复合过程激发，该谱线强度和电离层峰值电子密度NmF2存在很强的相关性。利用夜气辉135.6 nm辐射强度与F2层峰值电子密度NmF2的平方成正比的物理模型，建立了在不同经纬度、地方时、季节和太阳活动下均适用的反演算法。通过DMSP卫星上搭载的紫外光谱成像仪（SSUSI）实际观测的135.6 nm气辉辐射强度来反演相应时空的电离层F2层临界频率f0F2，并将其与地基测高仪探测结果做了综合对比。结果表明 ...
薛 仕翔 +7 more
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Rare Metals, EarlyView.ABSTRACT MCrAlX coatings are widely used as bond coats in thermal barrier coating systems to protect turbine blades from high‐temperature oxidation. However, their oxidation resistance is often restricted by uncontrolled microstructures, surface roughness, and aggregation of reactive elements (REs). In this study, high‐repetition‐rate femtosecond laser
Wei Qian +7 more
wiley +1 more source
Volumetric properties of ions in DMF-water mixtures(离子在DMF-水混合溶剂中的体积性质)
Zhejiang Daxue xuebao. Lixue ban, 2003 利用精密数字密度计测定了298.15 K氯化钾及氯化铵在N,N-二甲基甲酰胺(DMF)-水混合溶剂中的密度,计算了氯化钾及氯化铵的表观摩尔体积和极限偏摩尔体积,得到了相关离子的极限偏摩尔体积和迁移偏摩尔体积.结果表明,当DMF浓度为15%~45%时,K+和的极限偏摩尔体积均表现增加趋势;而Cl的极限偏摩尔体积在同一DMF浓度范围内则表现为逐渐减小.利用溶质溶剂和溶剂-溶剂相互作用对结果进行了讨论.
XULi(许莉), LINRui-sen(林瑞森)
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT The monoclinic CuNb2O6 (M‐CNO) with a columbite structure is a potential anode candidate for advanced lithium‐ion capacitors (LICs). However, its practical application is plagued seriously by the irreversible phase transformation and sluggish kinetics.
Xu‐Ting Li +6 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2003 目的 分析精液量、密度、活动率和活力与精浆抗精子抗体 （AsAb）的关系。方法 :间接血凝法测定AsAb。结果 :32 5 3例男性不育就诊者精浆AsAb阳性率为 9.81%。随着精液量、密度、活动率、活力降低 ,AsAb阳性率均明显增加 （P
刘睿智 +6 more
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Zhejiang Daxue xuebao. Lixue ban, 2005 近年来人们在激光冷却和捕获原子方面取得了辉煌的成就，对捕获的冷原子团温度、密度的精确测量也成为一个重要的研究课题.在冷原子温度测量中需要在较短时间内（最长不超过几个毫秒）迅速关断俘获冷原子的磁光阱（包括磁场和光场）.作者针对时间飞行法测量冷原子温度对光场和磁场的关断要求，设计并制作了一种简单、实用的可调脉冲延时和脉宽的脉冲发生器，应用其产生的脉冲在较短时间内有效地关断磁场和光场，达到冷原子温度测量的要求.
WUYan(吴艳) +3 more
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Studies on the role of bicarbonate in the activation of mammalian sperm upon ejaculation [PDF]
, 1988 Thesis--University of Tsukuba, D.M.S.(A), no. 558, 1988. 3.
Tajima Yutaka, 田島 裕
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In Situ Uniform Lithium Enrichment for Dense, High‐Performance LLZO Solid Electrolytes
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT A major challenge in garnet‐type Li7La3Zr2O12 (LLZO) system all‐solid‐state electrolytes is the high porosity that typically remains after sintering, which compromises ionic conductivity and degrades battery cycling performance. To address this, we propose an innovative strategy to achieve uniform lithium enrichment on the surface of ...
Yi‐Yang Xiao +8 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2007 目的探讨季节变化与精子参数、精浆果糖、中性α-糖苷酶的关系。方法采用精子形态检测系统下人工修正方法进行精子形态分析。采用精子质量检测系统进行精子密度、活力分析。精浆果糖含量、中性α-糖苷酶采用分光光度比色法测定。根据季节变化,结合本地实际情况分为四组:3-5月组,6-8月组,9-11月组,12-2月组。结果平均精子密度在3-5月组最高,9-11月组最低,9-11月组精子密度显著低于3-5月组 ...
李付彪 +5 more
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