Results 31 to 40 of about 40,893 (182)
Structured decision‐making as a framework to incorporate social equity into conservation decisions
Conservation Biology, EarlyView.Abstract Many conservation challenges require negotiating trade‐offs between the needs of different actors. Global frameworks such as the Kunming–Montreal Global Biodiversity Framework explicitly call for diverse participation and social equity in conservation decision‐making.
Emily Massingham +2 more
wiley +1 more source
四川大学学报. 自然科学版, 1991 讨论了连续汉语语音合成中的问题,介绍了采用线性预测方法,用专用语音合成芯片TMSs220实现实时连续汉语语音合成的原理和方法,同时以11个语音合成试验句和二字词组为例,进行了合成试验,得到了满意的结果。
苟大举 +3 more
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Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods
Conservation Biology, EarlyView.Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes +3 more
wiley +1 more source
Gongye shui chuli, 2002 混合二元酸是环己烷氧化制己二酸生产过程中的副产品, 其中含有丁二酸、戊二酸、己二酸等组分, 其组成复杂, 尽管价格便宜, 但分离成本高, 不经过分离进行综合利用受到很大的限制。实验不但成功地分别以戊二酸、己二酸为原料合成出新型的同碳二膦酸, 而且根据多组分缓蚀阻垢剂的协同效应原理, 采用组成复杂的混合二元酸一步合成出混合多元膦酸。对纯二元酸合成的产品和混合二元酸合成的产品缓蚀阻垢性能进行了比较。实验结果表明 ...
傅承碧
doaj
Optimizing biodiversity offsetting for habitat succession and colonization dynamics
Conservation Biology, EarlyView.Abstract Biodiversity offsetting aims to compensate for ecological losses from development through conservation and restoration. However, its long‐term outcomes under repeated impact–offset cycles remain uncertain. Using a conceptual forest succession model, we evaluated how offset outcomes are affected by interactions among compensation scale ...
Konstans Wells +4 more
wiley +1 more source
四川大学学报. 自然科学版, 2013 两温区气相输运合成ZnGeP2多晶,易发生化学计量比偏离,产生Ge、Zn3P2等杂相,在合成坩埚(石英安瓿)内壁凝聚一层ZnP2和P的沉积物.通过对合成设备、安瓿尺寸和工艺的改进,采用机械振荡炉体和竖直梯度降温相结合的新工艺,成功地合成出ZnGeP2多晶材料.合成的ZnGeP2多晶,经XRD分析测试,并采用Rietveld法进行全谱拟合精修、计算出各物相的相对含量.结果表明,改进工艺合成的ZnGeP2多晶是高纯单相材料,可用于单晶生长.采用改进工艺合成的ZnGeP2多晶为原料 ...
王志超 +7 more
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Zhejiang Daxue xuebao. Lixue ban, 2001 报道了采用一条新的合成路线在合成抗肿瘤天然产物( + )-7-epi-Goniofufurone的过程中，构建五元醚环时几种方法的比较研究.最后使用了简单的盐酸水溶液反应方法.使分子中的脱保护基和关环反应一步完成.将这一反应条件用于构建Goniofufurone类化合物五元醚环的合成还未见报道.
LIXin-hua(李新华) +4 more
doaj +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao +2 more
wiley +1 more source
四川大学学报. 自然科学版, 2002 合成了 1种三嗪衍生物——— 2 ,4 二氨基 6 羟乙胺基 1,3,5 三嗪 ,研究了合成反应的影响因素 .将合成的这种化合物与聚磷酸铵和季戊四醇复配成ABS的膨胀型阻燃剂 ,表现出较好的阻燃性 .
鲁建, 刘柯, 王玉忠
doaj
Novel synthesis of (E) -α, β-unsaturated nitroalkenes((E)-α, β-不饱和硝基烯烃的高度区域选择性合成方法)
Zhejiang Daxue xuebao. Lixue ban, 2012 醛和硝基甲烷在甲醇和NaOH水溶液的混合溶液中在0 ℃反应，随后用稀盐酸处理，生成(E)-α，β-不饱和硝基烯烃单一化合物，反应有高度的区域选择性，收率较高(76%〜95%).合成方法便捷、高效、清洁，属于绿色合成.
XIEJun-yi(谢隽毅) +6 more
doaj +1 more source