Results 81 to 90 of about 833,358 (231)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT To achieve high‐value utilization of spent catalysts, we recovered copper (Cu) from Cu‐bearing spent catalysts via acid‐base leaching to fabricate CuO and systematically studied how calcination temperature affects their microstructure and humidity‐sensing performance. Characterizations show that CuO‐500 (calcined at 500°C) has a large specific
Cong Liang +9 more
wiley +1 more source
, 2006 在机器人视觉测量系统中,手眼标定问题一直是一个很重要也很难解决的问题。结合一个具体的实际系统,提出了一种将摄像机外参数矩阵和手眼矩阵合在一起标定的新方法,免去了传统的摄像机外参数标定和手眼标定的麻烦,并因此减小了误差 ...
徐方, 王金涛, 曲道奎
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TA10 Titanium Alloy in HCl Solution: W‐Influenced Corrosion and Passivation Film Evolution
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT This work investigated the evolution of passive films of Ti–0.3Mo–0.8Ni (TMN) in 5 mol L−1 HCl and studied the influence of W on the anti‐corrosion properties of TMN. The intermittent electrochemical impedance spectroscopy test results showed that when TMN entered 5 mol L−1 HCl solution, the stability of the passive film first became stronger ...
Chaowen Zheng +7 more
wiley +1 more source
, 2011 Fe(Ⅱ)的含量及变化与土壤和沉积物的氧化还原性质关系密切。当与Fe(Ⅲ)共存时,Fe(Ⅱ)的测定往往受到干扰。本文研究了常用显色剂2,2’-联吡啶和菲洛嗪(Ferrozine)测定土壤Fe(Ⅱ)时存在的问题及解决办法。结果表明,Fe(Ⅲ)可与显色剂作用形成络合物,该络合物对Fe(Ⅱ)测定所用波段的光线具有吸收作用,从而使Fe(Ⅱ)浓度被过高估计。Fe(Ⅲ)对Fe(Ⅱ)测定的干扰程度与其浓度及所选显色剂有关。当以2,2’-联吡啶为显色剂时,单位浓度Fe(Ⅲ)(1.0 mg/L)将导致Fe(II ...
丁煜, 李清曼, 孙静娴
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Insights for conservation from the Ecological Knowledge Games project
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Environmental conservation research requires robust methods for collecting large‐scale behavioral data and engaging diverse stakeholders in decision‐making processes. We (Y.P., A.B.D., and N.B.) created EcoKnowGames (Ecological Knowledge Games), a transdisciplinary project that develops knowledge games for conservation science and data ...
Yuan Pan +4 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 1998 ５４０例成人血糖测定结果分析廖南山李祥福南雄市人民医院５１２４００血糖是临床生化检验常用的检测项目，为了解本地区健康成人血糖含量及血糖与某些疾病的关系，我科对５４０名体检人员进行血糖测定，现将测定结果报道如下。１测定对象测定对象为本市各单位参加体检的...
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Gongye shui chuli, 2016 对还原-偶氮分光光度法测定水中硝基苯类实验装置进行改革,研究并建立了分析测定的优化实验条件。在此实验条件的基础上,对测定方法中的显色酸度、样品空白等测定条件进行了优化和补充;增加了苯胺类样品空白实验,解决了苯胺类样品及空白样品与体系酸度调节条件不一致的问题;同时拓宽了校准曲线的测定范围。硝基苯质量浓度在0~1.6 mg/L范围内线性关系良好,方法检出限为0.004 mg/L。用优化改进后的测定方法对水质硝基苯标准样品和实际废水样品进行分析测定,样品测定精密度(n=6)小于3%;加标实验回收率达到96.4%
邢书才, 田衎
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, 2005 一种精确测定色谱峰形参数和重叠峰面积的方法，其特征在于：(1) 给定待测定色谱流出曲线(tk，hk)和峰数目q，tk，hk分别为流出曲线段中k点的时间值和色谱信号值，k＝1，2，…，n，n为总点数；(2)以高斯模型或指数修正的高斯模型为目标函数，对上述待测定色谱流出曲线进行峰拟合，通过非线性最小二乘法求出目标函数即拟合流出曲线的最佳参数，进而根据拟合流出曲线与待测定色谱流出曲线的对应关系，对应出待测定色谱峰形参数和重叠峰面积。本发明能快速、准确、方便地测量色谱峰形参数和重叠峰面积 ...
梁鑫淼, 薛兴亚
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Role of funders in embedding tests in conservation practice
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Effective conservation practice requires decisions based on reliable and relevant evidence, but significant gaps in the evidence base exist. Incorporating well‐designed tests of the effectiveness of interventions for biodiversity in conservation projects is one of the best ways to scale up the rate of evidence generation.
Rebecca K. Smith +28 more
wiley +1 more source
, 2004 本发明涉及细菌内毒素的检测，具体地说是测定鲎试剂灵敏度的方法，其特征在于：1)采用3-6个浓度的标准内毒素，在内毒素测定仪上，对不同灵敏度的标准鲎试剂进行试验，将其反应时间的对数与内毒素浓度的对数做线性回归，得到相应的不同灵敏度的标准曲线，作为判断的依据；2)待测灵敏度的鲎试剂，与1～6个浓度的标准内毒素反应，在相应的反应时间或溶液的吸光度条件下，利用标准曲线分别计算内毒素浓度及内毒素的回收率，根据回收率在75-120％之内的标准曲线所对应的灵敏度，确定为待测鲎试剂的灵敏度。本发明的优点是快速、准确 ...
邵英光, 王俊德, 李京华
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