Results 11 to 20 of about 34,310 (205)
Aeroacoustic differences between the Japanese fricatives [ɕ] and [ç] [PDF]
The Journal of the Acoustical Society of America, 2021 To elucidate the linguistic similarity between the alveolo-palatal sibilant [ɕ] and palatal non-sibilant [ç] in Japanese, the aeroacoustic differences between the two consonants were explored via experimentation with participants and analysis using simplified vocal tract models.
Tsukasa, Yoshinaga +2 more
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Journal of Experimental Phonetics, 2021 Este artículo pretende ser una respuesta unificadora ante la falta de conexión entre los enfoques sincrónico y diacrónico basados en el alófono [ç] de /x/ en el español de Sudamérica. Se llevaron a cabo dos experimentos: un análisis acústico basado en habla de laboratorio, semidirigida y espontánea, y un experimento de percepción (tarea de ...
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Shuitu Baochi Xuebao, 2022 土地利用变化是区域碳排放变化的主要驱动力, 揭示土地利用变化对碳排放影响对于碳排放政策的制定具有指导意义。然而, 经济快速发展区域中土地利用变化对碳排放影响研究仍有限。以安徽省为对象, 基于2000—2020年的土地利用变化数据, 从碳源/汇角度评估了安徽省净碳排放, 分析了碳排放时空特点, 从碳足迹、生态承载力和生态赤字3个方面阐明了安徽省碳排放效应。结果表明: (1)从2000—2020年, 安徽省土地利用净碳排放表现为增加趋势, 年均增加503.92万t, 林地是碳排放的主要碳汇 ...
李彦旻, 沈育生, 王世航
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Multifunctional thermal protective ceramic thermal/environmental barrier coatings (T/EBCs) are of great significance for applications of various high‐temperature components, and we propose an effective strategy for designing high‐entropy ceramics (HECs) as T/EBCs for SiC ceramic matrix composites (CMCs), where low thermal expansion ...
Qinshuo Wang +7 more
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Biomass‐Derived Laser‐Induced Graphene: From Precursor Chemistry to Device Integration
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Laser direct writing provides a mask‐free route for converting suitable carbon‐containing precursors into patterned, porous, and conductive laser‐induced graphene (LIG) networks. Although LIG was initially demonstrated mainly using aromatic synthetic polymers, such as polyimide, biomass precursors introduce renewable feedstocks with highly ...
Wanjun Yin +10 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Magnetic particles coated with carbon shells have been considered as promising electromagnetic wave absorption materials with antibacterial features. However, how to precisely control the monodispersed magnetic nanoparticles on a carbon matrix to manipulate impedance matching and antibacterial performances is still a key challenge.
Xiaofei Li +10 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Sodium‐ion batteries (SIBs) offer a promising, cost‐effective alternative for large‐scale energy storage due to the abundance of sodium. However, their practical deployment is challenged by sluggish interfacial kinetics and unstable interphase formation, which severely limit performance across wide temperature ranges. Here, we demonstrate that
Mingxing Zhang +10 more
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Gongye shui chuli, 1990 本文用鼓泡法研究了一些阻垢剂对碳酸镁、碳酸锶和碳酸钡析出的抑制作用。结果发现:(1)一些常用的碳酸钙阻垢剂不但可以抑制冷却水中碳酸钙垢的析出,而且还可以抑制冷却水中碳酸镁、碳酸锶和碳酸钡垢的析出;(2)这些阻垢剂对碳酸镁、碳酸锶和碳酸钡也有溶限效应(低浓度效应);(3)用鼓泡法既可研究阻垢剂对碳酸钙析出的抑制作用,也可研究阻垢剂对其它碱土金属碳酸盐析出的抑制作用。
周本省, 苏德中, 陆建英
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Shuitu Baochi Xuebao, 2011 以中国科学院海伦农业生态实验站的长期定位施肥土壤为基础,研究长期施肥对黑土密度分组中碳和氮的影响。结果表明:氮肥能够增加土壤有机碳和全氮含量,但不如NPKOM效果明显。土壤中各组分有机碳含量的变化趋势为重组>游离态轻组>闭蓄态轻组,三者之间差异达极显著水平(p闭蓄态轻组>重组,且游离态轻组明显大于其它两个组分。NPKOM处理的闭蓄态轻组和重组组分中的有机碳浓度和全氮浓度大于其它施肥处理。碳氮比的变化趋势为游离态轻组>闭蓄态轻组>土壤>重组,重组和土壤中,NPKOM处理的碳氮比最低,CK处理的碳氮比最大 ...
芦思佳 +3 more
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Zhongguo youzhi为实现无甘油生物柴油的高效制备，以共沉淀法制备的镁铝水滑石为载体，K2CO3溶液为浸渍液，通过等体积浸渍法制备高分散负载型固体碱催化剂，考察水滑石制备过程中金属盐种类以及物质的量比对其催化三组分（菜籽油、乙酸甲酯和甲醇）制备无甘油生物柴油性能的影响，并利用FTIR、XRD、TG、CO2-TPD、BET、SEM技术对催化剂进行表征。结果表明：以MgCl2和AlCl3为金属盐、镁铝物质的量比3∶ 1、K2CO3浓度2.0 mol/L、焙烧温度500 ℃条件下制备得到的固体碱为催化剂，在油酯醇物质的量比1∶
郑婧迪1，陶爽1，周瑞1，王春辉2，汤颖1,3 ZHENG Jingdi1 , TAO Shuang1 , ZHOU Rui1, WANG Chunhui2, TANG Ying1,3
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