Results 41 to 50 of about 23,188 (119)
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT This study developed a metal–modified fluoroethylene vinyl ether (FEVE) organic coating on 6061 aluminum alloy, supported by a micro‐arc oxidation (MAO) pretreatment layer, to enhance corrosion resistance and antifouling performance in marine environments.
Chang Liu +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 为研究造纸废水灌溉对中度盐碱退化芦苇湿地的土壤改良效应及对芦苇生长的影响,在大田内设置随机区组试验,研究了4种废水灌溉次数下的芦苇生长指标、土壤理化性状及土壤酶活性的变化特征.结果表明:随着废水灌溉次数的增加,芦苇密度、株高、盖度及地上生物量等生长指标显著增加;土壤容重和总孔隙度分别有减小和增大趋势;土壤pH值有所上升,而含盐量下降趋势显著.土壤有机质、速效N、速效P、速效K、全N及微生物生物量碳均表现出随废水灌溉次数增加有增多趋势,其中有机质、速效N在灌溉2～4次后,分别比CK显著增加32.0%,52.
夏江宝 +5 more
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT In electrocatalysis, traditional single‐atom catalysts (SACs) face challenges in achieving coordinated control of reaction pathways due to limitations such as single local energy levels and carrier recombination. By introducing an additional defect structure, it is possible to break the electronic structure symmetry, thereby activating SACs ...
Juanjuan Huo +8 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 为量化掺入再生粗骨料对两跨连续钢-再生混凝土组合板长期性能的影响并提出相应的设计方法，综合考虑混凝土非均匀收缩、徐变及开裂的影响，采用ABAQUS软件建立组合板长期性能有限元模型，并利用现有长期性能试验数据验证有限元模型的可靠性；进行有限元参数分析，量化再生粗骨料取代率等因素对两跨连续钢-再生混凝土组合板长期性能的影响；进而提出两跨连续钢-再生混凝土组合板长期性能设计方法，并对设计方法的可靠性进行评价。研究结果表明：所建立的有限元模型可有效预测两跨连续钢-再生混凝土组合板的长期性能 ...
王庆贺 +3 more
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Bimodal grain structure (BGS) demonstrates significant potential in synergistically optimizing the strength and plasticity of magnesium alloys. Acquiring the desired BGS consequently became a critical challenge. This study took the Mg‐9Gd‐1Zn‐0.5Zr (wt%, VZ91K) alloy as its subject. From the perspective of BGS formation mechanisms, it suggests
Shuai Yuan +5 more
wiley +1 more source
Dianci bileiqi, 2019 为了有效利用电涌保护器进行雷电防护,需要对雷电过电压作用下配电网SPD配合保护进行分析。本文利用EMTP软件搭建简化配电系统模型对IEEE标准推荐压敏电阻片模型进行仿真冲击,通过累积能量计算前后级SPD失效概率以及整体配合失效概率,计算前后级SPD残压与分流,讨论雷电流的波尾时间、前后级SPD连接电缆长度、通流容量对配合失效概率的影响。研究结果表明:SPD两级高低配合方式下,终端用电设备过电压得到了有效的抑制;前级SPD承受大部分雷电流和能量 ...
李文君, 李鹏飞, 李传荣
doaj
Gaoya dianqi, 2020 为了研究谐波对变压器铁心等效磁路长度与接缝区域损耗的影响,文中基于完全按照电力变压器的标准设计和制作的叠片铁心模型,在不同谐波激励条件下,对铁心模型的等效磁路长度与接缝区域的损耗特性进行试验研究。研究表明:谐波阶次与谐波相位对铁心的磁路长度影响不是很大,在谐波条件下分析计算铁心的磁滞回环或磁化曲线时,可近似选择铁心的几何平均长度作为有效的磁路长度;不同谐波阶次与不同谐波相位激励下,铁心接缝区域比总损耗特性的变化规律大致相同:当磁通密度小于0.5 T时,接缝区的损耗近似为零;当磁通密度高于1 T时 ...
赵志刚 +4 more
doaj
Functional Ecology, Volume 40, Issue 7, Page 2068-2082, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Grasslands worldwide are experiencing severe degradation due to overgrazing, climate change and anthropogenic disturbances, resulting in substantial declines in biodiversity and ecosystem functioning.
Xiaoqi Wang +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2016 通过野外水流冲刷试验，对比分析了不同坡长条件下坡面产流产沙及氮磷流失特征。结果表明，上方来水流量一定时，坡长越长，其坡面入渗量越大，径流量越小，且存在一个临界坡长，使得径流量和入渗量相当，累计径流量与坡长是负线性关系。随着坡长增加，产沙量增大，单位坡长的泥沙流失量在各坡长条件下差异并不显著（P＞0.05）。累计泥沙量随着坡长增大而增大；幂函数比指数函数能更好的描述硝态氮和水溶性磷浓度变化过程；泥沙中硝态氮和有效磷的含量整体上随时间呈减小趋势。坡长越长，其养分富集率越大；随着坡长增大 ...
赵光旭, 张鹏宇
doaj
Functional Ecology, Volume 40, Issue 7, Page 2128-2142, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
wiley +1 more source