Results 51 to 60 of about 15,113 (187)
Studies of the PPDF Chemical Reaction Rate Model for the Numerical Simulation of Nitrogen Oxides [PDF]
, 2016 本文在目前应用广泛的湍流燃烧模拟方法PPDF，即预设概率密度函数的基础上，以混合分数和温度为变量，同时引入时间尺度的考虑，提出了一个NOx计算模型——PPDF化学反应速率模型。在该模型的理论基础上，使用CHEMKIN软件的SENKIN模块，以详细的化学反应机理计算NO的生成速率，并将计算结果拟合建立成数据库。 使用该模型在STAR-CD中计算了三组湍流非预混射流火焰：H2、H2/CO/N2和CH4/H2/N2射流火焰，并与Sandia实验室公布的实验数据进行比较 ...
封颖
core
International Journal of Applied Linguistics, Volume 36, Issue 1, Page 522-539, February 2026.ABSTRACT This paper examines the features of metadiscourse across different teacher moves in university linguistics classroom discourse and the teaching strategies reflected in its use. The results reveal that teachers employ diverse metadiscourse during classroom interactions to support student reasoning.
Jingjie Li, Wenjie Hu
wiley +1 more source
Health Economic Evaluation of Cervical Cancer Prevention Strategies based on System Dynamics Model [PDF]
, 2016 人民健康是民族昌盛和国家富强的重要标志，应放在优先发展的战略地位。坚持预防为主，倡导健康文明生活方式，预防控制重大疾病。然而，政府和个人的医疗负担愈加沉重，人均医疗费用快速增长的势头仍未彻底逆转。作为经济学与医疗的交叉学科，卫生经济学专注于如何解决有效配置医疗资源。针对重大疾病预防，权衡当期的预防费用支出和远期的产出，对科学地定量化地规划医疗政策具有重要作用，同时也将是未来的发展方向之一。宫颈癌是女性常见的恶性肿瘤，也是目前唯一病因明确、可以早期预防和治疗、可以消灭的癌症。HPV疫苗价格较高 ...
宋晓彬
core
International Journal of Applied Linguistics, Volume 36, Issue 1, Page 652-666, February 2026.ABSTRACT Given the importance of the linguistic landscape in language learning, the digital linguistic landscape (DLL) has emerged as an important multimodal input resource. However, few studies have been conducted to explore the antecedent and predictive effect of the DDL on L2 writing. To address this gap, the study attempted to conceptualize the DLL
Zi Yang, Lawrence Jun Zhang
wiley +1 more source
, 2018 为了提高均四甲苯氧化制均苯四甲酸二酐的收率,以某二酐生产企业生产的高效钒钛催化剂,在固定床反应器中对均四甲苯气相氧化制均苯四甲酸二酐反应体系的动力学进行了研究。首先提出了可能的反应网络,然后设计相关动力学测试实验,建立均四甲苯氧化反应的幂函数宏观动力学模型。进一步的实验和统计分析表明,模型计算值与实验值吻合较好。宏观动力学方程的建立为后续将其用于相应的固定床反应器模拟提供了基础保证。新疆维吾尔自治区自然科学基金项目(2015211A004 ...
曹玲, 曹茂洪, 薛来奇, 陈秉辉
core
Flocculation and Settlement Behavior and Dynamic of Fine-grained Hematite Concentrate [PDF]
This is an article in the field of mining processing engineering. The article takes fine-grained hematite concentrate as the research object, explores the effects of the molecular weight of flocculant, the concentration of flocculant, the dosage of ...
Chuan LU, Qin ZHANG, Xin DONG
core +1 more source
Veterinary Dermatology, Volume 37, Issue 1, Page 148-160, February 2026.Background: The antibacterial efficacy of chlorhexidine shampoo is directly affected by formulation and bathing factors. Hypothesis/Objective: To evaluate the in vitro antibacterial efficacy of chlorhexidine‐containing shampoos at various dilutions and to compare their lathering ability.
Emily E. Binversie +2 more
wiley +1 more source
基于镜像磁场和动力学模型的变压器负载振动噪声数字孪生模型研究
Gaoya dianqi, 2022 负载电流引起的绕组振动是运行中变压器噪声的主要来源之一。为了深入研究变压器绕组的负载振动特性，文中首先提出了基于镜像法的绕组漏磁场和绕组电动力计算模型，然后建立了绕组轴向振动的动力学模型，结合电动力计算了绕组振动特性，最后建立了绕组声辐射的有限元模型分析了绕组的声场分布。对一台50 kVA变压器的计算结果表明，镜像法计算的绕组电动力与有限元法的误差小于5%，额定电流下绕组的振动加速度约为0.065 m/s2，绕组辐射噪声最大达到43 dB。文中提出的模型可支撑变压器振动噪声数字孪生技术的研究及应用。
罗兵 +5 more
doaj
Flotation Kinetics of Copper Resources Associated with Micro-fine Particle Tungsten Tailings [PDF]
The change rule of copper floating rate with time was investigated at the optimum reagent system (ester agent Z-200, combined xanthate collector iso-amyl +Y89 xanthate(9∶1) and foaming agent MIBC) obtained by the flotation test from a fine particle ...
Bohao YANG +3 more
core +1 more source
High Performance Catalyst Design by Artificial Intelligence for Acetylene Hydrochlorination
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT The rapid development of artificial intelligence (AI) has brought transformative contributions to society, revolutionizing various fields through its advanced computational capabilities and data‐driven approaches. In the field of materials science, AI has become a powerful tool that significantly accelerates the discovery of new materials by ...
Yuan Zhou +12 more
wiley +1 more source