Results 21 to 30 of about 833,358 (231)
, 2020 随着可调谐二极管激光吸收光谱(TDLAS)技术在工业测量与科学研究领域的广泛应用,对其测量结果的质量进行量化评定已成为迫切需要。以一套已集成的TDLAS测温系统为例,根据最新国家标准,基于不确定度传播律,理论分析了影响测温结果测量不确定度的因素,给出了评定TDLAS测温系统在线测量结果不确定度的一般方法。分析表明TDLAS系统测温结果的测量不确定度随所测温度值的变化而变化,并受所选谱线参数、吸收信号信噪比、系统响应情况等条件的影响。理论推导了针对测温系统的不确定度评定公式 ...
李仁杰 +5 more
core
Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods
Conservation Biology, EarlyView.Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes +3 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2007 目的在老年体检中用不同方法进行尿蛋白测定并对结果进行观察比较。方法使用常规尿蛋白测定试纸法、尿微量白蛋白干化学试带、尿液总蛋白测定及免疫比浊法尿微量白蛋白定量测定的方法对100例老年体检尿液标本及100例青年体检尿液标本进行检测。结果200例标本常规尿蛋白测试均为阴性,免疫比浊法测定、尿微量白蛋白干化学试带法及尿液总蛋白浓度测定敏感度高,与免疫比浊法相比,尿微量白蛋白干化学试带法测定的敏感性为94.7%,特异性为86.4%。干化学试带法测定阳性标本的尿总蛋白浓度与阴性标本相比,结果有极显著性差异 ...
王顺, 徐升强
doaj
Methodology to identify ecologically matching areas and its applications in conservation planning
Conservation Biology, EarlyView.Abstract Identifying ecologically matching areas is both challenging and critical for understanding spatial patterns of biodiversity and advancing conservation planning. However, existing approaches often lack spatial flexibility, overlook shape and size constraints, or rely on limited environmental parameters, reducing their effectiveness in real ...
Pietro Milanesi +7 more
wiley +1 more source
Shiyan dongwu yu bijiao yixue, 2021 目的探讨大鼠血清葡萄糖测定分析的影响因素。方法分别用两台生化分析仪、两种方法的试剂或不同保存条件的大鼠血清样品检测葡萄糖水平。结果两台生化分析仪测定大鼠血清葡萄糖的结果差异无统计学意义（P＞0.05），相关性良好（相关系数r为0.994）；两种方法的试剂测定结果差异显著（P＜0.01），但相关性良好（相关系数r为0.999）； 血清即刻测定与4 ℃冷藏保存4 h、24 h测定的结果差异均无统计学意义（P＞0.05），相关性良好（相关系数r为0.999）；血清即刻测定与－20 ℃、－80 ...
doaj +1 more source
Integrating migratory connectivity data into the conservation of Australian sharks and rays
Conservation Biology, EarlyView.Abstract Understanding migratory connectivity is important for conserving highly mobile marine species facing escalating threats. Establishing baseline information on migratory connectivity is necessary for identifying species and regions requiring transboundary cooperation for their conservation.
Diego F. Bezerra +9 more
wiley +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao +2 more
wiley +1 more source
Gongye shui chuli, 2006 水样色度的测定目前还无分光光度法国家标准，主要采用铂钴色标目视比色法和稀释倍数法测定。介绍了用751分光光度计测定污水色度的最佳条件是波长339nm、3cm比色皿、配以深紫色滤光片，测定结果的线性相关系数r在0.9999以上；该方法不仅能准确测定常规水样色度，还可将高色度的污水多倍稀释后进行准确测定。
曾凡亮, 罗先桃
doaj +2 more sources
Gongye shui chuli, 1985 冷却水中各种形式的磷含量的测定,目前多采用化学分解—比色测定;膦酸类化合物产品含量的测定多采用络合滴定法。
彭崇智, 朱法祥
doaj +2 more sources
Learning Styles, Engagement and Anxiety in AI‐Mediated Writing: A Multimodal Feedback Study
International Journal of Applied Linguistics, EarlyView.ABSTRACT Artificial intelligence (AI) tools now permeate English academic writing. However, evidence on how feedback modalities align with student differences and with psychological mechanisms remains limited. Prior work often reduced learning styles to simple matches with delivery modes and treated learning engagement and writing anxiety as peripheral.
Yi Ren +3 more
wiley +1 more source