Results 21 to 30 of about 52,542 (179)
生态环境与保护市政污水处理厂由于进水浓度太低,往往会额外投加碳源进行脱氮处理,不符合节能减排的要求。基于传统生物脱氮技术的不足,文章提出了短程硝化反硝化、厌氧氨氧化和同步硝化反硝化等技术,这些脱氮新技术可以节省能耗和碳源。基于此,本文对生物脱氮新技术的研究现状、问题与发展方向进行了探讨。
Yu Zhang, Hai-Bo Deng, Ya Li, He Sun
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The development of lightweight, high‐attenuation, and broadband carbon‐based electromagnetic wave absorbers is hindered by the intrinsic trade‐off between impedance matching and dielectric dissipation. Herein, we report a facile and scalable synthesis of N‐doped lignin‐derived interconnected porous carbon (Nx‐LIPC) via hydrogen‐bond self ...
Bin‐Peng Zhang +7 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Dielectric polymers commonly suffer from severe performance degradation above 150°C, hindering advanced power systems. Herein, we demonstrate a polyetherimide (PEI) nanocomposite that overcomes this by mimicking the gradient architecture of nacre and bamboo, incorporating a continuous vertical gradient of fluorinated boron nitride nanosheets ...
Jian Wang +8 more
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Shuitu Baochi Xuebao, 2021 在尿素减量施用条件下，探究添加酸化沸石（SF）对氮素淋失及籽粒氮肥利用率的影响。通过等温吸附试验，结合土柱淋溶和玉米盆栽试验，研究酸化沸石对NH4+—N和NO3-—N的吸附性能，以及不同施氮梯度下，酸化沸石对氮素淋失和氮肥利用率的影响，试验分别设置农民习惯施肥（CN）、氮肥减量15%（CN1）、氮肥减量30%（CN2）3个施氮梯度并分别添加土重0.2%的酸化沸石（CN+SF、CN1+SF、CN2+SF）。结果表明，酸化沸石对NH4+—N和NO3-—N的最大吸附量分别为25.44，31.59 mg/g ...
孔柏舒 +5 more
doaj
Medical Research and Practice目的 分析双相情感障碍患者接受奥氮平+碳酸锂治疗效果。方法 50例双相情感障碍患者就诊于2022年9月-2023年9月，随机数字表分组。A 组奥氮平+碳酸锂治疗，B 组碳酸锂治疗，对比Bech-Rafaelsen 躁狂量表（BRMS）评分、临床总体印象疾病严重度量表-双相障碍版（CGI-s-BP）评分、疗效、生存质量量表（SF-36）评分及不良反应差异。结果 A 组BRMS 分数、CGI-s-BP分数低于B 组，P ＜ 0.05；A 组疗效高于B 组，P ＜ 0.05；A 组SF-36分数高于B组，P ...
Xin Lu
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The development of structurally stable anodes with high capacities and long cycle lives is essential for the development of potassium–ion batteries. Conversion‐type anodes have attracted considerable attention in potassium–ion batteries (PIBs) due to their high theoretical capacities.
Jeong Ho Na +7 more
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Shuitu Baochi Xuebao, 2008 在滇池北岸韭黄生产基地采用田间试验的方法,研究了氮肥减施及双氰胺(DCD)施用对土壤氮素流失的影响。结果表明:减施20%的氮肥,韭黄产量无明显减少,但可以分别减少淋溶、侧渗、径流水氮损失37.0%,22.2%和28.9%左右,减少韭黄硝酸盐含量13.6%左右。减施20%氮肥后配施双氰胺,可以增加韭黄产量8.7%左右,分别减少淋溶、侧渗、径流水氮损失58.4%,59.7%和17.1%左右,减少韭黄硝酸盐含量24.8%。因此,该技术对减少滇池北岸韭黄地氮素流失和降低韭黄硝酸盐含量具有重要实践意义和推广价值。
张瑞杰 +5 more
doaj
Shuitu Baochi Xuebao, 2021 为探明地下水埋深与减施氮肥对夏玉米氮素吸收利用及产量的影响，基于大型地中渗透仪，研究了地下水埋深和施氮量对夏玉米氮素利用效率、植株氮素积累量、产量及其形成要素的影响，其中地下水埋深设2 m（G1），3 m（G2）和4 m（G3）3个水平，施氮量设减氮20%处理（240 kg/hm2，N1）、常规施氮处理（300 kg/hm2，N2）2个水平，不控水不施氮处理（G0N0）作为对照，共计7个处理。结果表明：（1）减氮20%条件下，夏玉米产量随地下水埋深增加呈减小趋势，氮素收获指数在埋深2 m下显著高于埋深3，
佘映军 +8 more
doaj
Electric Power Technology and Safety Management火力发电锅炉采用低氮燃烧技术，旨在减少氮氧化物（NOx）排放，提高燃烧效率，并兼顾锅炉稳定性与经济性。本文评估了低氮燃烧技术在燃烧效率、NOx排放浓度、锅炉稳定性、经济性和技术适应性五个方面的表现。通过采用二次风垂直分级高位燃尽风系统、主燃烧器区二次风喷口优化设计等策略，实现了燃烧效率的提升和NOx排放的大幅降低。同时，锅炉稳定性得到保障，经济性显著，且该技术对不同煤种和锅炉类型的适应性良好。
尚国 王
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Functional Ecology, Volume 40, Issue 6, Page 1878-1891, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao +8 more
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