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Comprehensive Evaluation of Starch and Noodles Quality of Different Sweet Potato Varieties Based on Principal Component Analysis and Cluster Analysis [PDF]
To scientifically evaluate the starch quality of different sweet potato varieties and establish the sweet potato starch quality evaluation system, 10 starchy sweet potato varieties were used as experimental materials.
Mei FU +6 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2023 研究根-土复合体土-水特征曲线与抗剪强度的关系,可为紫色土埂坎根-土复合体强化机理的揭示与埂坎稳定性的维持提供科学依据。选取三峡库区典型紫色土坡耕地埂坎草本植物根—土复合体为研究对象,结合Hyprop2土壤水分特征曲线测量仪、滤纸法与直剪试验,拟合土-水特征曲线,揭示基质吸力对根-土复合体抗剪强度的影响。结果表明:(1)根-土复合体土-水特征曲线明显分为边界效应区、过渡区与非饱和残余区,3种常用模型(B-C、VG、F-X)中F-X模型拟合该曲线效果最好,根-土复合体饱和含水率、进气吸力 ...
郑文娇 +4 more
doaj
Network Public Opinion Analysis and Its Application Research Based on Topic Model [PDF]
, 2017 随着“互联网+”战略的深入贯彻，网络舆情已经成为把握时下舆论热点的先锋战场。鉴于网络舆情的重要地位，本文在研读有关网络舆情发展现状和主题模型应用的基础上，提出自适应标签主题模型（ALS-TM）与自适应时间窗动态主题模型（ATS-DTM）两个主题模型，分别从静态和动态两个角度捕捉舆情热点及其演化方向。第一部分，本文提出基于静态视角下的主题模型：自适应标签主题模型，用以提高主题解释力。ALS-TM模型结合主题聚合度指标与K-Means聚类算法，寻找最优分类标签，以此增强主题提取效率。实验结果表明：第一 ...
于学伟
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Single‐atom catalysis hinges on fundamental challenges in precisely controlling metal‐support interactions and rationally regulating metal–adsorbate relationships. Herein, we report a universal strategy for constructing highly efficient and well‐defined Cu(I) single‐atom catalysts based on a trifurcate AlL3 molecular support.
Donghui Zhang +9 more
wiley +1 more source
Gaoya dianqi, 2012 温度是油纸绝缘老化的主要因素。笔者设计了油浸式电力变压器常用的普通牛皮纸和环烷基矿物油复合绝缘在90℃下长达370 d的热单因子老化试验。利用XRD（X射线衍射）定期测量不同老化状态的绝缘样品,对比分析了绝缘纸的聚态结构的变化情况,并深入讨论绝缘纸聚合度下降的动力学过程。研究结果表明:绝缘纸在老化过程中,纤维素氢键和糖苷键发生断裂,引起聚合度下降,结晶区遭受破坏,晶粒尺寸减小,导致纤维素分子间作用力减弱,热裂解活化能降低;老化过程中,绝缘纸纤维素晶体类型不变,聚合度的下降规律符合二阶动力学模型 ...
向彬 +4 more
doaj
Shuitu Baochi Xuebao, 2020 为探究紫色土坡地植物篱篱前淤积带与篱下土坎土壤抗蚀性的差异及变化规律，选取遂宁市水土保持试验站10°新银合欢植物篱小区（T1）、10°和15°香根草植物篱小区（T2和T3）进行研究。研究小区布设有上、中、下坡篱带，分别采集篱前淤积带和篱下土坎（下坡无）的表土样，测定有机质含量、水稳性团聚体和微团聚体组成，运用主成分分析法对土壤抗蚀性进行分析。结果表明：同一篱带，土壤有机质含量、团聚度和团聚状况均是篱前淤积带高于篱下土坎，土壤水稳性团聚体含量和抗蚀性综合指数则反之，篱下土坎的抗蚀性综合指数是篱前淤积带的1.
王针针 +5 more
doaj
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Contents and Structure Analysis of Tannins in Leaves of Three Cultivars of Camellia sinensis [PDF]
, 2009 测定了本山、黄旦和铁观音三个品种茶树成熟叶片的总酚及可溶缩合单宁含量,并通过基质辅助激光解吸附飞行时间质谱(MAldI-TOfMS)研究了茶叶缩合单宁的基本结构。结果显示,三种茶叶均具有较高的总酚含量,大约为200Mg/g;三种茶叶的缩合单宁是以(表)儿茶素(EC/C)和(表)棓儿茶素(EgC/gC)为基本结构单元的均聚物和杂聚物,且大部分聚合物的结构单元之间存在A型和b型两种连接方式,其中本山和黄旦缩合单宁的最高聚合度要大于铁观音。The contents of total polyphenols ...
李敏 +4 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan +6 more
wiley +1 more source