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Conditional selection with CNN augmented transformer for multimodal affective analysis

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CAAI Transactions on Intelligence Technology 2024年第4期9卷 917-931页

作者： Jianwen wang shiping wang Shunxin Xiao Renjie Lin Mianxiong Dong Wenzhong Guo College of Computer and Data Science Fuzhou UniversityFuzhouChina College of Computer and Cyber Security Fujian Normal UniversityFuzhouChina Key Laboratory of Network Computing and Intelligent Information Processing Fuzhou UniversityFuzhouChina Digital Fujian Institute of Big Data Security Technology Fujian Normal UniversityFuzhouChina Department of Sciences and Informatics Muroran Institute of TechnologyMuroranJapan

Attention mechanism has been a successful method for multimodal affective analysis in recent years. Despite the advances, several significant challenges remain in fusing language and its nonverbal context information. One is to generate sparse attention coefficients associated with acoustic and visual modalities, which helps locate critical emotional se-mantics. The other is fusing complementary cross‐modal representation to construct optimal salient feature combinations of multiple modalities. A Conditional Transformer Fusion Network is proposed to handle these problems. Firstly, the authors equip the transformer module with CNN layers to enhance the detection of subtle signal patterns in nonverbal sequences. Secondly, sentiment words are utilised as context conditions to guide the computation of cross‐modal attention. As a result, the located nonverbal fea-tures are not only salient but also complementary to sentiment words directly. Experi-mental results show that the authors’ method achieves state‐of‐the‐art performance on several multimodal affective analysis datasets.

关键词： affective computing data fusion information fusion multimodal approaches

A study of the soil water potential threshold values to trigger irrigation of ‘Shimizu Hakuto’ peach at pivotal fruit developmental stages

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Horticultural Plant Journal 2024年第2期10卷 376-386页

作者： Yusui Lou Yuepeng Han Yubin Miao Hongquan Shang Zhongwei Lv Lei wang shiping wang Horticulture Reseach Institute Henan Academy of Agricultural SciencesZhengzhouHenan 450002China School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical Garden of the Chinese Academy of SciencesWuhanHubei 430074China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Water management is an important practice that affects fruit size and *** implementation of irrigation scheduling requires knowledge of the appropriate indicators and thresholds,which are established manly based on the effects of water deficits on final fruit *** studies have focused on the real-time effects of water status on fruit and shoot *** establish soil water potential (ψ_(soil)) thresholds to trigger irrigation of peach at pivotal fruit developmental stages,photogrammetry,^(13)C labelling,and other techniques were used in this study to investigate real-time changes in stem diameter,fruit projected area,net leaf photosynthetic rate (P_(n)),and allocation of photoassimilates to fruit under soil water potential conditions ranging from saturation to stress in 6-year-old Shimizu hakuto’*** growth,fruit growth,and P_n exhibited gradually decreasing sensitivity to water deficits during fruit developmental stages I,II,and *** diameter growth was significantly inhibited whenψ_(soil)dropped to-8.5,-7.6,and-5.4 k Pa,*** growth rate was low,reaching zero when theψ_(soil)was-9.0 to-23.1,-14.9 to-21.4,and-16.5 to-23.3 k Pa,respectively,and P_ndecreased significantly when theψ_(soil)reached-24.2,-22.7,and-20.4 kPa,*** addition,more photoassimilates were allocated to fruit under moderateψ_(soil)conditions (-10.1 to-17.0 k Pa) than under otherψ_(soil)*** results revealed threeψ_(soil)thresholds,-10.0,-15.0,and-15.0 kPa,suitable for triggering irrigation during stages I,II,and III,*** thresholds can be helpful for controlling excessive tree vigor,maintaining rapid fruit growth and leaf photosynthesis,and promoting the allocation of more photoassimilates to fruit.

关键词： Peach Soil water potential Irrigation threshold Fruit expansion Photosynthesis

Drought decreases the positive impact of warming on an alpine grassland community

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Science China Earth Sciences 2024年

作者： wang A wangwang Lü Yang ZHOU Bowen LI Jianping SUN Jingya Lü Lanying CHEN Dorji TSECHEO shiping wang Key Laboratory of Tibetan Plateau Earth Resources and Environment Institute of Tibetan Plateau Research Chinese Academy of Sciences University of the Chinese Academy of Sciences School of Ecology and Environment Tibet University

Temperature and precipitation are the main factors determining plant community succession and aboveground net primary productivity (ANPP) in natural grasslands. However, most climate manipulative experiments have mainly focused on their impacts in isolation, especially in alpine regions. Here we explored the relative effects and interaction of warming and precipitation alteration on succession and ANPP using a 7-year experiment involving warming with precipitation alteration(increase (IP) or decrease (DP) in precipitation relative to ambient precipitation (AP)) on the Tibetan Plateau. Our results showed that warming and warm-wet conditions increased species richness, diversity index, height and cover of overall ***, decreasing precipitation reduced them, but increased S. purpurea and the rate of change in community composition. Importantly, warming mitigated the impacts of decreased precipitation on plant community composition, and the interactive effects of warming and altered precipitation on cover, height and plant ANPP varied with year and plant ***, warming increased community ANPP through increases in forb ANPP or non-dominant species ANPP and biodiversity regardless of change in precipitation. However, decreased precipitation reduced community ANPP via decreases in the ANPP of sedges and forbs and biodiversity. Precipitation alteration affected the relationship between biodiversity and community ANPP regardless of warming (IP更多还原AbstractFilter('ChDivSummary', 'ChDivSummaryMore', 'ChDivSummaryReset');

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青藏高原高寒植物对生长季偶发性霜冻事件表现出深度过冷却现象

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Journal of Plant Ecology 2024年第3期17卷 84-94页

作者： Ji Suonan wangwang Lü Aimée TClassen Wenying wang Ben La Xuwei Lu Cuo Songzha Chenghao Chen Qi Miao Fanghui Sun Lhamo Tsering shiping wang College of Life Sciences Qinghai Normal UniversityXining 810016China Key Laboratory of Biodiversity Formation Mechanism and Comprehensive Utilization of the Qinghai-Tibet Plateau in Qinghai Province Xining 810016China State Key Laboratory of Tibetan Plateau Earth System Resources and EnvironmentInstitute of Tibetan Plateau ResearchBeijing 100101China Department of Ecology and Evolutionary Biology University of MichiganMI 48109USA

气候变暖促进了植物的春季物候,打破了气候与植物生长之间原有的平衡。随着极端气候事件出现更加频繁,气候与植物生长之间的不匹配性会影响植物的生存、生长和繁殖。为了防止生长季节在细胞内结冰,植物会采用过冷却策略。然而,气候事件... 详细信息

气候变暖促进了植物的春季物候,打破了气候与植物生长之间原有的平衡。随着极端气候事件出现更加频繁,气候与植物生长之间的不匹配性会影响植物的生存、生长和繁殖。为了防止生长季节在细胞内结冰,植物会采用过冷却策略。然而,气候事件的严重程度和物候期可能会影响植物在霜冻事件后的恢复。本研究通过实验探究了4种不同严重程度的极端霜冻事件如何影响青藏高原上两种优势物种钉柱委陵菜(Potentilla saundersiana,仲夏开花)和小龙胆(Gentiana parvula,夏末开花)的过冷却点和枯黄期。探讨了物候期如何影响钉柱委陵菜对霜冻事件的反应。结果发现,两个物种在遭受霜冻损害时都表现出过冷现象。钉柱委陵菜的平均过冷却点为−6.9℃,并受最低温度、持续时间和物候期的影响,而小龙胆的平均过冷却点为−4.8℃,最低温度和持续时间对其过冷却点影响不显著。此外,两个物种在最低温度(−10℃)处理持续4小时后均快速枯黄。本研究首次探索并定量了青藏高原高寒植物的过冷却点。鉴于高寒植物遭遇霜冻事件的概率不断增加,上述结果对了解高寒植物的生长和生存如何应对极端气候的不利影响具有重要意义。

关键词：气候变化极端霜冻事件过冷却现象物候期枯黄

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考虑热效应的空化流动研究进展

力学学报 2024年第8期56卷 2165-2183页

作者：马静雯王诗平杨英狄郑智颖熊骋望哈尔滨工程大学船舶工程学院哈尔滨工业大学能源科学与工程学院

高速航行体的多相水动力学过程,如水下发射与超空泡航行等,在通入高温气体形成空泡的过程中需考虑热效应对空泡动力学的影响.且火箭低温液态燃料供应及核反应堆高温管道输送等工程问题中发生的空化现象也具有显著的热效应.在以上流动中... 详细信息

高速航行体的多相水动力学过程,如水下发射与超空泡航行等,在通入高温气体形成空泡的过程中需考虑热效应对空泡动力学的影响.且火箭低温液态燃料供应及核反应堆高温管道输送等工程问题中发生的空化现象也具有显著的热效应.在以上流动中,热效应不仅仅会改变流体的物理性质,影响相间质量输运和热传递,还会引发复杂的动力学和热力学变化,因此考虑热效应的空化机理、能量的传递和输运规律以及流动不稳定性机理是亟需解决的关键科学问题.文章基于不同影响因素将考虑热效应的空化流动分为高温壁面空化、高温通气空泡、高温水空化以及低温热敏流体空化,并分别综述了4类情况下空泡演化特性和影响规律.此外,总结归纳了数值模拟考虑热效应的空化流动常用的空化模型和湍流模型,以及在实验研究中采用的各种多物理场测量技术,但相关数值仿真和实验技术还有待进一步发展完善.未来还需深入研究热效应对空化流动生成和稳定性的影响机制,全面了解和掌握热效应空化流动的特点和行为,为相关领域的工程设计和优化提供更加准确的数据支撑、分析工具和理论基础.

关键词：热效应空化流动多相流多物理场

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镁改性增强小麦秸秆生物炭对镉的吸附能力:表面络合模型研究

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生态环境学报 2024年第4期33卷 617-625页

作者：王室苹李梅安娅秦好丽贵州师范大学化学与材料科学学院贵州贵阳550025

近年来研究改性生物炭有效去除水中重金属成为热门,但使用表面络合模型从微观探讨生物炭对镉的吸附机理鲜见报道。通过MgCl2与小麦秸秆生物炭(WB)共热解制备镁改性生物炭(MgWB)。SEM-EDS、FTIR和BET等表征显示镁成功接枝到生物炭,Mg的... 详细信息

近年来研究改性生物炭有效去除水中重金属成为热门,但使用表面络合模型从微观探讨生物炭对镉的吸附机理鲜见报道。通过MgCl2与小麦秸秆生物炭(WB)共热解制备镁改性生物炭(MgWB)。SEM-EDS、FTIR和BET等表征显示镁成功接枝到生物炭,Mg的质量分数增加了3.97%,生物炭表面新增Mg-O峰且-OH、-C-O峰增强,镁改性未改变小麦秸秆的条状管道主体结构但比表面积降低9.94%。293-313 K的等温吸附曲线表明改性前后生物炭的吸附行为均符合Langmuir模型,MgWB在313 K时最大饱和吸附密度(3.50μmol·m-2)是WB的3.7倍。Boehm滴定实验显示改性使总酸性官能团增加13.4%,其中代表高、中、低亲和型官能团的羟基、内酯基、羧基浓度分别增加4.28%、8.92%和0.178%。电位滴定曲线显示镁改性导致生物炭的pHpzc从9.2降为5.3,不同pH条件下Cd2+的吸附边实验中WB和MgWB吸附率达90%所需pH分别为9和6,结果表明吸附平衡所需pH值与pHpzc有关,且pHpzc的改变会导致生物炭表面位点类型在不同pH条件下的镉吸附差异。利用非静电表面络合模型NEM、以广义复合法进行拟合,最佳参数计算的位点分布曲线显示WB和MgWB的吸附贡献主要为高亲和型位点,该位点与Cd^(2+)的吸附态浓度达到最高值所对应的pH分别为10和7;模型拟合参数pKa和pK≡SOCd+表明镁改性导致生物炭表面官能团的质子化能力降低,与Cd^(2+)的络合能力增强。镁改性可以丰富生物炭表面官能团,通过增加表面位点浓度和降低pHpzc有效改善生物炭对重金属的吸附。本研究在使用非静电表面络合模型拟合中将表面位点类型的吸附贡献与pHpzc结合讨论微观吸附机理,为生物炭-重金属的相互作用提供了一种新的量化手段。

关键词：生物炭 Cd 镁改性非静电表面络合模型表面酸碱性质吸附小麦秸秆

葡萄果实内油菜素内酯生物合成调控及生理效应

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分子植物育种 2024年第6期22卷 2060-2068页

作者：李嘉佳李相怡王磊王世平上海交通大学农业与生物学院上海200240

油菜素内酯是调控植物生长发育的重要植物激素,具有促进植物细胞分裂和生长、光合作用和呼吸作用、植株光形态的建成、提高抗逆性以及降低蒸腾等作用,对葡萄果实产量和品质的提高均有着极其重要的贡献。本研究综述了油菜素内酯的生物合... 详细信息

油菜素内酯是调控植物生长发育的重要植物激素,具有促进植物细胞分裂和生长、光合作用和呼吸作用、植株光形态的建成、提高抗逆性以及降低蒸腾等作用,对葡萄果实产量和品质的提高均有着极其重要的贡献。本研究综述了油菜素内酯的生物合成途径及其关键酶、生物合成途径的影响因素,以及其对葡萄果实产量和品质的影响,总结了油菜素内酯对植物光合作用、呼吸作用、蒸腾作用及植物光形态的建成的生理效应。同时,对油菜素内酯与其他植物内源激素的互作网络进行了梳理,并提出未来的研究方向应以油菜素内酯合成相关转录因子、与其他植物激素互作机理和开发新型高效的油菜素内酯类植物调节剂为主。

关键词：葡萄油菜素内酯合成生理效应互作机理

青藏高原高寒区植物叶片性状对模拟增温的响应

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生态学杂志 2024年第6期43卷 1638-1645页

作者：王慧清王常顺吕汪汪姜丽丽李博文王奇斯确多吉汪诗平内蒙古自治区气象台呼和浩特010051 呼伦贝尔学院内蒙古呼伦贝尔021008 内蒙古自治区国土空间规划院呼和浩特010051 中国科学院青藏高原研究所北京100101 中国科学院大学北京100094 中国科学院青藏高原地球科学卓越中心北京100101

气候变化对青藏高原高寒区生态系统带来潜在风险,而植物叶片性状能反映出植物对气候变化的响应过程和机制。本研究在青海海北高寒草甸群落采用自由空气红外加热法模拟增温,以高寒草甸8种主要植物叶片为对象,研究了增温对8种植物叶片性... 详细信息

气候变化对青藏高原高寒区生态系统带来潜在风险,而植物叶片性状能反映出植物对气候变化的响应过程和机制。本研究在青海海北高寒草甸群落采用自由空气红外加热法模拟增温,以高寒草甸8种主要植物叶片为对象,研究了增温对8种植物叶片性状的影响。结果表明:经过8年模拟增温,部分植物的叶片大小、叶脉密度、叶脉率、比叶质量、叶片碳同位素千分值等5种性状发生显著的变化,而碳氮含量和碳氮比没有显著的变化。植物叶片大小比植物其他叶片性状对温度变化的响应更敏感。增温对叶片性状具有显著的长期影响,但不同植物叶片性状的响应方向和程度存在显著差异。增温对不同分布类型和叶脉类型植物的叶片性状的影响存在差异。植物应对环境变化的对策多样,这表现在不同植物的同一性状对于气候的差异化响应,同时也表现在同种植物不同性状对于气候变化的协同响应。

关键词：气候变化高寒草甸增温叶片性状协同响应青藏高原

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Dinitrogen extrusion from diazene in organic synthesis

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Chinese Chemical Letters 2022年第8期33卷 3695-3700页

作者： Chunngai Hui shiping wang Chunfa Xu Institute of Pharmaceutical Science and Technology College of ChemistryFuzhou UniversityFuzhou 350108China National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou UniversityFuzhou 350108China Max Planck Institute of Molecular Physiology Department of Chemical BiologyDortmund 44227Germany

Radical-mediated reactions have many advantages in the construction of complex molecular scaffolds by forging chemical bonds of high ***,including 1,1-diazenes and 1,2-diazenes,can generate biradical species via nitrogen extrusion under thermal or photochemical *** superior reactivity of the generated biradical enables various types of synthetic transformations with excellent chemoselectivity and has been applied to the complex natural products *** this mini-review,the modes of reaction are summarized and discussed,namely ring contraction via nitrogen deletion,homo or heterodimerization,trimethylenemethane(TMM)-diyl *** of these classes of reactions in complex natural product synthesis are *** but not least,the current state,future directions,and opportunities for dinitrogen extrusion reaction from diazenes are highlighted and discussed.

关键词： Diazene Biradical Dimerization Ring contraction Natural product synthesis