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Surface Chemistry of Cu[OCHMeCH2NMe2]2 on MCM-41

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Surface Chemistry of Cu[OCHMeCH2NMe2]2 on MCM-41

Noble-metal-free plasmonic MoO_(3-x)-based S-scheme heterojunction for photocatalytic dehydrogenation of benzyl alcohol to storable H2 fuel and benzaldehyde

中国化学会第五届全国结构化学学术会议

作者： Guoying Zhang Jinlin Long Lili Xie Xuxu Wang xianzhi fu Research Institute of Photocatalysis,fuzhou University,fuzhou,350002

＜正＞Supported copper catalysts are known to be active for a variety of reactions,including methanol synthesis,methanol partial oxidation,and NO reduction.[1]Synthesis of surface organic copper complex with definite ...

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Chinese Journal of Catalysis 2022年第10期43卷 2665-2677页

作者： Yingcong Wei Qiqi Zhang Ying Zhou Xiongfeng Ma Lele Wang Yanjie Wang Rongjian Sa Jinlin Long xianzhi fu Rusheng Yuan State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350108FujianChina School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina School of Environment&Civil Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina Institute of Oceanography Ocean CollegeMinjiang UniversityFuzhou 350108FujianChina

Simultaneous generation of H_(2) fuel and value-added chemicals has attracted increasing attention since the photogenerated electrons and holes can be both employed to convert solar light into chemical ***,for realizing UV-visible-NIR light driven dehydrogenation of benzyl alcohol(BA)into benzaldehydes(BAD)and H_(2),a novel localized surface plasmon resonance(LSPR)enhanced S-scheme heterojunction was designed by combining noble-metal-free plasmon MoO_(3-x) as oxidation semiconductor and Zn_(0.1)Cd_(0.9)S as reduction *** photoredox system of Zn_(0.1)Cd_(0.9)S/MoO_(3-x) displayed an unconventional reaction model,in which the BA served as both electron donor and *** S-scheme charge transfer mechanism induced by the formed internal electric field enhanced the redox ability of charge carriers thermodynamically and boosted charge separation ***,due to the LSPR effect of MoO_(3-x) nanosheets,Zn_(0.1)Cd_(0.9)S/MoO_(3-x) photocatalysts exhibited strong absorption in the region of full solar ***,the Zn_(0.1)Cd_(0.9)S/MoO_(3-x) composite generated H_(2) and BAD simultaneously via selective oxidation of BA with high production(34.38 and 33.83 mmol×g^(–1) for H_(2) and BAD,respectively)upon full solar *** under NIR light irradiation,the H_(2) production rate could up to 94.5 mmol×g^(–1)×h^(–1).In addition,the Zn_(0.1)Cd_(0.9)S/MoO_(3-x) composite displayed effective photocatalytic H_(2) evolution rate up to 149.2 mmol×g^(–1)×h^(–1) from water,which was approximate 6 times that of pure Zn_(0.1)Cd_(0.9)*** work provides a reference for rational design of plasmonic S-scheme heterojunction photocatalysts for coproduction of high-value chemicals and solar fuel production.

关键词： Zn_(0.1)Cd_(0.9)S/MoO_(3-x)S-scheme heterojunction Localized surface plasmon resonance Benzyl alcohol oxidation Hydrogen generation full-spectrum light response

Dynamics of 2×2 matrix non-Hermitian quantum systems on Bloch sphere

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Communications in Theoretical Physics 2024年第4期76卷 66-71页

作者： Libin fu Graduate School of China Academy of Engineering Physics Beijing 100193China

By casting evolution to the Bloch sphere, the dynamics of 2 × 2 matrix non-Hermitian systems are investigated in detail. This investigation reveals that there are four kinds of dynamical modes for such systems. The different modes are classified by different kinds of fixed points, namely,the elliptic point, spiral point, critical node, and degenerate point. The Hermitian systems and the unbroken PT non-Hermitian cases belong to the category with elliptic points. The degenerate point just corresponds to the systems with exceptional point(EP). The topological properties of the fixed point are also discussed. It is interesting that the topological charge for the degenerate point is two, while the others are one.

关键词： non-Hermitian quantum system two-level system dynamics on the Bloch sphere PT-symmetry fixed points

Coupling Coordination Analysis of Cropland Intensification and Agroecosystem Services:Evidence from Loess Plateau in Shaanxi Province,China

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Chinese Geographical Science 2024年第3期34卷 401-419页

作者： fu Shaowu fu Mengyu QIU Menglong Center for Land Resource Research in Northwest China Shaanxi Normal UniversityXi’an 710119China

One of the greatest challenges in the agroecosystem is to improve cropland intensification while preserving agroecosystem *** many studies have investigated the effect of cropland intensification on agroecosystem service,the interactive coupling and coordination among these factors remain largely *** view of this,this study performed a case study of the Loess Plateau in Shaanxi Province,China and constructed comprehensive evaluation models to quantify the cropland intensification and agroecosystem service in this *** analysis and the coupling coordination degree model were used to evaluate the interactive relationship between cropland intensification and agroecosystem service,and statistical analysis and spatial autocorrelation were used to analyze the spatial characteristics and potential mechanism of the coupling *** show that both the cropland intensification and agroecosystem service in the study area were relatively low yet gradually increased from 2000 to *** service lag was identified as the dominant unbalanced development *** the supply capacity of agroecosystem services plays a key role in the balanced development of cropland in the Loess *** coupling coordination degree between cropland intensification and agroecosystem service ranges from basic coordination to serious ***,cropland intensification practices in the area should be optimized to enhance this coordination *** upward trend was also observed in the coupling coordination degree from2000 to *** withdrawal of marginal cropland in the Grain for Green program is one of the most important reasons for this trend,especially for the northern *** 83.6%of the high-high clusters are concentrated in the southern region of the Loess Plateau,whereas 70.5%of the low-low clusters are distributed in the northern *** clustering characteristics are mainly attributed to the environmental

关键词： cropland intensification agroecosystem services balance analysis coupling coordination degree Loess Plateau,China

Floating Waste Discovery by Request via Object-Centric Learning

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Computers, Materials & Continua 2024年第7期80卷 1407-1424页

作者： Bingfei fu School of Computer Science Fudan UniversityShanghai200438China

Discovering floating wastes,especially bottles on water,is a crucial research problem in environmental ***,real-world applications often face challenges such as interference from irrelevant objects and the high cost associated with data ***,devising algorithms capable of accurately localizing specific objects within a scene in scenarios where annotated data is limited remains a formidable *** solve this problem,this paper proposes an object discovery by request problem setting and a corresponding algorithmic *** proposed problem setting aims to identify specified objects in scenes,and the associated algorithmic framework comprises pseudo data generation and object discovery by request ***-data generation generates images resembling natural scenes through various data augmentation rules,using a small number of object samples and scene *** network structure of object discovery by request utilizes the pre-trained Vision Transformer(ViT)model as the backbone,employs object-centric methods to learn the latent representations of foreground objects,and applies patch-level reconstruction constraints to the *** the validation phase,we use the generated pseudo datasets as training sets and evaluate the performance of our model on the original test *** have proved that our method achieves state-of-the-art performance on Unmanned Aerial Vehicles-Bottle Detection(UAV-BD)dataset and self-constructed dataset Bottle,especially in multi-object scenarios.

关键词： Unsupervised object discovery object-centric learning pseudo data generation real-world object discovery by request

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光催化重整碳水化合物制氢

西安交通大学学报 2008年第8期42卷 1044-1048页

作者：付先亮王绪绪张子重苏辉煌龙金林付贤智福州大学光催化研究所福州350002

通过溶胶凝胶法制备了纳米晶TiO2光催化剂,并采用浸渍还原法制得相应负载贵金属的TiO2.利用XRD、UV-VIS-DRS和N2吸附等方法表征了催化剂的结构和织构,同时考察了反应气氛、Pt负载量、贵金属种类、葡萄糖投加量等对葡萄糖重整产氢的影响... 详细信息

通过溶胶凝胶法制备了纳米晶TiO2光催化剂,并采用浸渍还原法制得相应负载贵金属的TiO2.利用XRD、UV-VIS-DRS和N2吸附等方法表征了催化剂的结构和织构,同时考察了反应气氛、Pt负载量、贵金属种类、葡萄糖投加量等对葡萄糖重整产氢的影响,比较了不同分子量碳水化合物在Pt/TiO2上光催化重整产氢的效率.结果表明,贵金属修饰对TiO2的晶相、比表面积的影响并不大,但能大大提高TiO2对糖类的产氢活性.当负载Pt的质量分数为1%时,样品对葡萄糖的光催化产氢活性最大;当负载等量贵金属且质量分数均为1%时,重整葡萄糖产氢的活性由高到低的顺序为:Pt/TiO2,Pd/TiO2,Au/TiO2,Rh/TiO2,Ag/TiO2,Ru/TiO2,其中Pt/TiO2与Pd/TiO2、Ag/TiO2与Ru/TiO2的活性相近.另外发现,O2对葡萄糖光催化重整产氢有抑制作用,而N2气氛对重整产氢有促进作用.多糖重整反应研究表明,Pt/TiO2对某些糖类有良好的光催化重整产氢活性,但产氢速率却随着多糖聚合度的增加逐渐降低.葡萄糖投加量实验表明,葡萄糖初始浓度对产氢反应速率的影响符合Langmuir-Hinshelwood关系式.

关键词：光催化碳水化合物制氢

Photodegradation of organic compounds in water over TiO2 supported activated carbon fibers: the effect of molecular size

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Photodegradation of organic compounds in water over TiO2 sup...

LMR-CBT: learning modality-fused representations with CB-Transformer for multimodal emotion recognition from unaligned multimodal sequences

第十三届全国催化学术会议

作者： Rusheng Yuan, xianzhi fu, Ping Liu, Xuxu Wang (Research Institute of Photocatalysis, College of Chemistry & Chemical Engineering, fuzhou University, fuzhou 350002)

＜正＞The use of immobilized photocatalysts is gaining importance in the elimination of pollutants from wastewaters. Much research has been devoted to immobilizing TiO2 photocatalyst on suitable supporting matrix like silica, alumina, zeolites, activated carbon, etc. for practical application. But the difficulties in

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Frontiers of Computer Science 2024年第4期18卷 39-47页

作者： Ziwang fu Feng LIU Qing XU Xiangling fu Jiayin QI School of Computer Science(National Pilot Software Engineering School) Beijing University of Posts and TelecommunicationsBeijing 100876China Key Laboratory of Trustworthy Distributed Computing and Service(BUPT) Beijing 100876China Shanghai International School of Chief Technology Officer East China Normal UniversityShanghai 200062China School of Computer Science and Technology East China Normal UniversityShanghai 200062China School of Cyberspace Security Guangzhou UniversityGuangdong 510006China

Learning modality-fused representations and processing unaligned multimodal sequences are meaningful and challenging in multimodal emotion *** approaches use directional pairwise attention or a message hub to fuse language,visual,and audio ***,these fusion methods are often quadratic in complexity with respect to the modal sequence length,bring redundant information and are not *** this paper,we propose an efficient neural network to learn modality-fused representations with CB-Transformer(LMR-CBT)for multimodal emotion recognition from unaligned multi-modal ***,we first perform feature extraction for the three modalities respectively to obtain the local structure of the ***,we design an innovative asymmetric transformer with cross-modal blocks(CB-Transformer)that enables complementary learning of different modalities,mainly divided into local temporal learning,cross-modal feature fusion and global self-attention *** addition,we splice the fused features with the original features to classify the emotions of the ***,we conduct word-aligned and unaligned experiments on three challenging datasets,IEMOCAP,CMU-MOSI,and *** experimental results show the superiority and efficiency of our proposed method in both *** with the mainstream methods,our approach reaches the state-of-the-art with a minimum number of parameters.

关键词： modality-fused representations cross-model blocks multimodal emotion recognition unaligned multimodal sequences computational affection

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二氧化钛/多孔硅/硅异质结的表面光电压谱

材料研究学报 2000年第5期14卷 558-560页

作者：李旦振刘平付贤智福州大学福州大学光催化研究所福州市350002

首次在多孔硅（ＰＳ）的表面镀纳米二氧化钛（ＴｉＯ２）薄膜，表面光电压谱（ＳＰＳ）测试表明：镀膜后多孔硅的光电压信号增强约２～３个数量级，其原因可能是双异质结构ＴｉＯ２／ＰＳ／ｐ－Ｓｉ能有效地吸收近红外一直到紫外光... 详细信息

首次在多孔硅（ＰＳ）的表面镀纳米二氧化钛（ＴｉＯ２）薄膜，表面光电压谱（ＳＰＳ）测试表明：镀膜后多孔硅的光电压信号增强约２～３个数量级，其原因可能是双异质结构ＴｉＯ２／ＰＳ／ｐ－Ｓｉ能有效地吸收近红外一直到紫外光，并且近本征的多孔硅自建电场增大，使光生电子－空穴对能有效地分离；ＰＳ／ｐ－Ｓｉ之间的势垒差产生的阻止少于向电极扩散的背向电场，也能有效地增强光生电压．

关键词：表面光电压谱多孔硅异质结纳米二氧化钛薄膜