Results 51 to 60 of about 22,525 (166)
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
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Integrating light emission and electromagnetic wave (EMW) absorption into a single material opens up possibilities for multienvironmental applications. Herein, we propose a novel “molecular engineering‐pyrolysis conversion” strategy to construct a bifunctional system with tunable photoluminescence and efficient EMW absorption performance.
Renjie Wang +7 more
wiley +1 more source
Jacking resistance in collapsed body considering buckling of force chain [PDF]
In order to establish an effective and secure emergency rescue channel within a collapsed structure using the pipe jacking method, understanding the evolution mechanism of jacking resistance is crucial.
Chuanbo HAO +5 more
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Functional Ecology, Volume 40, Issue 5, Page 1428-1442, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract The stoichiometric imbalance caused by nitrogen (N) deposition typically exacerbates phosphorus (P) limitation in plants. However, it remains unclear whether this effect extends to soil microbes, particularly those in the rhizosphere.
Jipeng Wang +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
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Photocatalytic hydrogen evolution technology is a crucial approach to achieve efficient solar energy conversion and green hydrogen production. However, traditional semiconductor photocatalysts often face issues such as weak visible‐light response, high photogenerated charge carrier recombination, and poor structural stability, severely ...
Longtao Guo +8 more
wiley +1 more source
Tunable narrow linewidth fiber laser with two FBG-FPs [PDF]
, 2013 基于游标原理,利用一对自由谱宽(fSr)略有不同的光纤布喇格光栅法布里-珀罗腔(fbg-fP)作为模式选择器件,设计了一种新颖的环形腔光纤激光器。从理论和实验上研究了该激光器的特性。通过对可调谐fbg-fP应力调谐,在1552.240~1552.912 nM范围内,以96 PM为平均间距,获得了8个由固定fbg-fP的透射谱所确定的窄线宽稳定激光输出。8个输出波长的平均功率为-17.66 dbM,波动在0.7 db范围内。当泵浦光的功率为95 MW的时候,输出信号的信噪比均大于50 db。实验上每隔1 ...
周金龙, 杜勇, 董小鹏, 陈敏秀
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Soft‐magnetic materials (SMMs) are indispensable for electrification and sustainable energy systems, yet their inherent mechanical fragility fundamentally limits applications under severe mechanical stresses. Enhancing the yield strength of SMMs is essential to prevent the degradation in magnetic performance and failure from plastic ...
Nairan Wang +6 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
Simultaneous Determination of Water-Soluble Vitamins with Capillary Electrophoresis [PDF]
, 2000 建立了高效毛细管电泳同时测定水溶性维生素制剂中的维生素 B1、维生素 B2、维生素 B6、维生素 B12、维生素 C、烟酸、烟酰胺等的方法。缓冲液为 0 .0 2 mol/ L的硼酸溶液 ,毛细管为 5 0μm× 5 0 cm,检测波长为 190 nm (适用于维生素 B1、维生素 B6、维生素 B12、烟酸、烟酰胺 )和 2 6 5 nm(适用于维生素 B2、维生素 C) ,分离度高 ,方法简便。A simple, rapid and efficient method for the ...
严健 +4 more
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