Results 21 to 30 of about 888 (150)
Rare Metals, EarlyView.ABSTRACT Expanding near‐infrared (NIR) spectral response and utilizing ultraviolet (UV) photons are effective strategies for enhancing the power conversion efficiency (PCE) of lead halide perovskite solar cells (PSCs). However, the range of NIR spectral response extension and the utilization of UV light for devices are not enough, and the loss of ...
Li He +9 more
wiley +1 more source
, 2019 以异氰酸酯对竹材表面进行接枝改性,大幅提升了天然竹材的抗蚀性能。研究中分别以热水预处理竹材(H-bam)和碱预处理竹材(A-bam)为原料,采用二环己甲烷4,4′-二异氰酸酯(HMDI)为改性剂,得到改性竹材样品H-HMDI-bam和A-HMDI-bam。抗蚀机制研究表明:改性后竹材表面的羟基数量明显减少,羰基、酰胺官能团增加,HMDI成功接枝到纤维表面并成絮状包裹状,A-HMDI-bam和H-HMDI-bam的负载量分别为6.342和4.080 mmol/cm~2。改性样品疏水性明显增强,其中H ...
唐兴 +4 more
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Latin American Policy, Volume 16, Issue 4, December 2025.ABSTRACT In recent years, video assistant referee systems have been increasingly used to correct unfair decisions in sports. Similarly, I argue that constitutional referendums play a corrective role in hybrid or competitive authoritarian regimes, where the electoral referee is biased and the government enjoys unfair advantages.
Muhammet Derviş Mete
wiley +1 more source
Shuitu Baochi Xuebao, 2000 研究结果表明＞0.25mm的水稳性闭粒含量可作为北盘江中游地区土壤抗蚀性指标。土壤抗蚀性与土壤有机质成正相关，与土壤石砾含量成负相关，但按影响土壤抗蚀性大小，影响因子的排序是：土壤石砾含量＞岩性＞土壤有机质＞坡度＞土地利用类型；建立了4个预测土壤抗蚀性的数学模型，这些模型具有较高的精度，其中两个模型可直接用于野餐测定。
安和平
doaj +2 more sources
, 2007 对海底隧道衬砌混凝土抗蚀影响因素进行了全面分析,建立了多因素的影响模型。指出以氯盐、硫酸盐和镁盐为代表的海洋环境介质的化学侵蚀破坏、以气候因素和盐类结晶为代表的物理因素作用、以自身结构的密实程度与收缩变形为代表的自身因素是影响隧道衬砌混凝土抗蚀性的3大主要因素。它们既相互联系又相互促进。其中 ...
杨艳春 +4 more
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Island restoration to rebuild seabird populations and amplify coral reef functioning
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Mobile organisms like seabirds can provide important nutrient flows between ecosystems, but this connectivity has been interrupted by the degradation of island ecosystems. Island restoration (via invasive species eradications and the restoration of native vegetation) can reestablish seabird populations and their nutrient transfers between ...
Ruth E. Dunn +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 1994 该文通过对海堤林带树木根系及土壤抗冲，抗蚀和渗透性的测定分析，发现同一地段土壤的抗冲，抗蚀指数表土层大于底土层。树木根系，尤其是根径≤２ｍｍ的细根有较强的固特土壤功能，抗冲指数与根长，根量间有明显的相关性，单相关系数分别为０．９３２６和０．８２５６。吸机质含量高的土壤抗蚀性强，抗蚀指数大，与有机含量间的相关系为０．８９３１，与细根的根长和根量的相关性相对较低，单相关系数分别为０．８２１６和０ ...
张金池 康立新
doaj +2 more sources
Shuitu Baochi Xuebao, 2021 为评价植被恢复过程土壤基质改良对紫色土抗蚀性的影响，在湖南南部耒阳山地紫色土进行土壤基质改良试验，测定土壤基质未经处理（对照地）、表层与底层土置换（土层置换地）、表层与底层土置换并添加有机物改良剂（基质改良地）的紫色土0—10，10—20 cm土层13个抗蚀性评价指标，运用相关性分析和主成分分析方法筛选影响紫色土抗蚀性的主要指标，建立综合评价模型评价紫色土不同土壤基质处理后的抗蚀性。结果表明：（1）与对照地相比，基质改良地0—10，10—20 cm土层有机碳含量、抗蚀指数、> 0.25 mm湿筛团聚体、>
范世才, 方晰, 王振鹏, 陈金磊
doaj
影响地下隧道衬砌混凝土抗蚀性因素的优化设计(英文) [PDF]
, 2008 从提高混凝土本体的密实性与防腐能力和维持钢筋钝化性能的化学环境出发,对影响地下隧道衬砌混凝土抗蚀性的主要因素进行了研究。通过对胶凝材料组分与颗粒级配、高效减水剂与新型高效钢筋阻锈剂进行优化设计,实现了对水化产物相和界面结构的调控与优化。研究结果表明:地下隧道衬砌混凝土的优化配比为5%～10%(质量分数,下同)硅灰与30%～40%大掺量粉煤灰复合内掺,1.30%萘系或1.25%聚羧酸系高效减水剂与8%还原铁粉或0.05%D–葡萄糖酸钠阻锈剂复合外掺,该多元组分混凝土满足抗渗等级>P20 ...
胡红梅, 钱刚, 马保国
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Effects of Configuration Ratios for Contour Planting and Replanted Sugarcane on Gully Erosion-Induced Nitrogen and Phosphorus Losses on Slopes [PDF]
, 2023 [Objective] The suitable configuration ratios for contour planting and replanted sugarcane on slopes were determined in order to provide technical support for reducing slope ditch erosion and nutrient loss, improving cultivated land quality and rational ...
Chen Tingting +8 more
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