Results 11 to 20 of about 61,733 (199)
Zhejiang Daxue xuebao. Lixue ban, 2000 铝硅合金试样经酸溶解,在0.20 mol·L-1氢氟酸和0.1 1 mol·L-1硼酸介质中,用电感耦合等离子体发射光谱(ICP-AES)法同时测定主要成分Si及杂质元素Fe，Zn，Cu，Mn，Ti，Mg含量。结果表明此方法检出限为0.0010～0.079 μg/mL ...
WUJian-zhi(吴建之)
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Analysis of the growth mechanisms of CO/Si(100)-(2×1)interface by UPS(CO在Si(100)表面生长的光电子谱研究)
Zhejiang Daxue xuebao. Lixue ban, 2000 本文着重介绍了CO/Si(100)界面CO原子与表面Si原子的相互作用.在不同覆盖度或经不同退火温度处理，CO，Si原子之间存在不同的相互作用.当覆盖度为10ML时经350℃退火处理后，Si(100)表面将形成COSi2处延.
BAODe-song(鲍德松) +2 more
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Zhejiang Daxue xuebao. Lixue ban, 2010 研究了丙硫氧嘧啶对L—半胱氨酸包覆的ZnS纳米粒子荧光强度的影响,发现在pH=6.5的KH2PO4-NaOH缓冲溶液中,丙硫氧嘧啶对功能化ZnS纳米粒子有荧光猝灭作用,据此建立了以功能化的ZnS纳米粒子为荧光探针测定药物制剂中丙硫氧嘧啶含量的荧光分析法.丙硫氧嘧啶浓度在4.00×10-6~4.00×10-4 mol • L-1范围内与体系的荧光强度线性关系良好,相关系数r=0.998 7,检出限(S/N=3)为1.70×10-6 mol • L-1,对浓度为4.00× 10-5 mol • L ...
LIJuan-juan(李娟娟) +1 more
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Complexation Kinetics, Dissociation, and Interaction Mechanism of Cationic Peptide ε-Poly-L-Lysine Complexed with Negatively Charged Polysaccharides(阳离子肽ε-聚赖氨酸与负电荷多糖复合物的形成动力学、解离效应及作用机制) [PDF]
Shipin kexue jishu xuebaoPoly-L-lysine (ε-PL) is a polycationic antimicrobial peptide with a high positive charge density, widely used as a natural preservative in the food industry.
LIU Zhenjie(刘振杰) +8 more
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Fushe yanjiu yu fushe gongyi xuebao煤化工废水中含有大量难降解有机物，其中包括酚类剧毒物，对环境造成严重威胁，因此，采用经济合理的处理手段净化煤化工废水，实现资源循环利用一直是研究的热点方向。本研究选取4种煤化工废水中常见有机物苯酚、对甲酚、对苯二酚和喹啉模拟煤化工废水，采用电离辐照技术对废水模拟样品进行处理，并使用过氧化氢（H2O2）进行催化氧化，结合处理前后废水样品化学需氧量（COD）、5 d生物需氧量（BOD5）等理化性质，研究辐照技术对废水样品理论可生化性的影响。结果表明，γ射线辐照通过水的辐解作用产生高活性自由基 ...
李 震 +7 more
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Zhejiang Daxue xuebao. Lixue ban, 2006 采用超临界CO2流体萃取(SFE)和气相色谱\质谱联用提取测定了烟丝中的挥发性成分.对超临界萃取过程中的影响因素包括萃取压力、温度、萃取夹带剂等条件结合萃取物测定得到的气相色谱-质谱图进行综合考察，确定了适宜的萃取条件.与传统的蒸馏萃取法比较，超临界CO2流体萃取提取物中含较多的松油醇、烷烃、烟碱等物质.
XUZi-gang(徐子刚), ZHENGLin(郑琳)
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智能科学与技术学报, 2021 随着深度学习技术的突破和大型数据集的提出，行人轨迹预测的准确度已经成为人工智能领域的研究热点之一。主要对行人轨迹预测的技术分类和研究现状进行详细的综述。根据模型建模方式的不同，将现有方法分为基于浅层学习的轨迹预测方法和基于深度学习的轨迹预测方法，分析了每类方法中具有代表性的算法的效果及优缺点，归纳了当前主流的轨迹预测公开数据集，并在数据集中对比了主流轨迹预测方法的性能，最后对轨迹预测技术面临的挑战与发展趋势进行了展望。
李琳辉, 周彬, 任威威, 连静
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Main Detection Methods of Active Ingredients in Health Food(保健食品活性成分的主要检测方法) [PDF]
Shipin kexue jishu xuebao, 2013 The mount of active ingredients is the key to effectiveness of health food. And the accurate detection methods are the important for the health food quality. The detection methods for active ingredients in health food can be divided into optical analysis
YANG Xiu-fang(杨秀芳) +2 more
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European Policy Analysis, EarlyView.ABSTRACT This paper explores the integration of gender mainstreaming in urban food policies (UFPs) through three Spanish case studies: Barcelona, Valencia, and Zaragoza. While UFPs are pivotal for addressing sustainability in urban food systems, attention to gender disparities within them remains insufficient.
Chiara Bergonzini, Francesca Donati
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How Changing Narratives About the Future Shape Policymaking for the Long Term
European Policy Analysis, EarlyView.ABSTRACT How can we explain decisions by governments to engage in policy investments—accepting short‐term costs in return for anticipated gains in the longer term—after previously sustaining the status quo? Our article examines the role of narratives in changing expectations about the future as a key driver of intertemporal policymaking. In light of an
Pieter Tuytens, Charlotte Haberstroh
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