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Radicals as Chiral Catalysts for Asymmetric Radical Cyclization Reactions

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Chinese Journal of Chemistry 2024年第19期42卷 2412-2416页

作者： Quan-qing Zhao Min gu Jia-Rong Chen Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening College of PharmacyJliangsu Ocean UniversityLianyungangJiangsu 222005China Engineering Research Center of Photoenergy Uitilization for Pollution Control and Carbon Reduction College of ChemistryCentral China Normal UniversityWuhanHubei 430079China

Due to the innate highly reactive properties and short life-time,organic free radicals can often serve as promoters or intermediates to engage in various radical transformations,which are often otherwise difficult to access by ionic pathway-based *** the evolvement of radical chemistry,chiral radical catalyzed-transformations have recently emerged as an attractive and robust platform for synthesis of chiral molecules of ***,we highlight several creative and strategic advances in chiral radical catalyst design,cyclization reaction achievements,and future challenges.

关键词： Chiral radical catalysis Radical cyclization Thiyl radical Boryl radical Asymmetric synthesis

Large-Capacity and High-Speed Instruction Cache Based on Divide-by-2 Memory Banks

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Journal of Electronic Science and Technology 2021年第4期19卷 335-349页

作者： qing-qing Li Zhi-guo Yu Yi Sun Jing-He Wei Xiao-Feng gu with the Engineering Research Center of IoT Technology Applications(Ministry of Education) Jiangnan UniversityWuxi 214122 with the No.58 Research Institute China Electronics Technology Group CorporationWuxi 214035

An increase in the cache capacity is usually accompanied by a decrease in access *** balance the capacity and performance of caches,this paper proposes an instruction cache(ICache)architecture based on divide-by-2 memory banks(D2MB-ICache).The control circuit and memory banks of D2MB-ICache work at the central processing unit(CPU)frequency and the divide-by-2 CPU frequency,respectively,so that the capacity of D2MB-ICache can be expanded without lowering its *** sequential access,D2MB-ICache can output the required instruction from memory banks per CPU cycle by dividing the memory banks with a partition mechanism and employing an inversed clock *** non-sequential access,D2MB-ICache will fetch certain jump instructions one or two more times,so that it can catch the jump of the request address in time and send the correct instruction to the *** results show that,compared with conventional ICache,D2MB-ICaches with the same and double capacities show a maximum frequency increase by an average of 14.6%and 6.8%,and a performance improvement by an average of 10.3%and 3.8%,***,energy efficiency of 64-kB D2MB-ICache is improved by 24.3%.

关键词： Cache capacity expansion divide-by-2 frequency instruction cache(ICache) inversed clock.

Synthesis and Characterization of Picolinamide Calix[6]arenes Derivatives

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Chinese Chemical Letters 2006年第6期17卷 747-750页

作者： Dong qing LIU Ya qing FENG Hao Hui gu Wen Liang XU School of Chemical Engineering and Technology Tianjin University Tianjin 300072

Three full-substituted calix[6]arenes containing the picolinamide groups were synmesized and characterized by IR, ^1HNMR and MS, after series reactions, including lower rim etherification, upper rim ipso-nitration, re... 详细信息

关键词： Calixarene picolinamide synthesis characterization.

Synthesis, Crystal Structure, and Magnetic Properties of a Co Metal-organic Framework with Mixed Dicarboxylate and Tricarboxylate Ligands

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Chinese Journal of Structural Chemistry 2016年第2期35卷 257-263页

作者： LI Wen-Bin GAO Zhu-qing gu Jin-Zhong School of Chemical and Biological Engineering Taiyuan University of Science and Technology College of Chemistry and Chemical Engineering Lanzhou University

One new mixed-ligand coordination polymer,namely[Co2（btc）（bpdc）（0.5）（py）3]n（1）,was hydrothermally synthesized using biphenyl-2,4,4＇-tricarboxylic acid（H3btc） as a main building block,along with two auxiliary ligands（H2bpdc = 2,2＇-bipyridine-5,5＇-dicarboxylic acid and py =pyridine）.The product 1 was characterized by IR spectroscopy,elemental,thermogravimetric,and single-crystal X-ray diffraction ***-crystal X-ray diffraction studies show that compound 1 possesses an intricate 3D metal-organic framework based on tetracobalt（Ⅱ） *** susceptibility measurement indicates that compound 1 shows an antiferromagnetic coupling between the Co（Ⅱ） ions.

关键词： metal-organic framework carboxylate ligand magnetic properties

Flow Separation and Vortex Dynamics in Waves Propagating over A Submerged Quartercircular Breakwater

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China Ocean Engineering 2018年第5期32卷 514-523页

作者： JIANG Xue-lian YANG Tian ZOU qing-ping gu Han-bin Tianjin Key Laboratory of Soft Soil Characteristics & Engineering Environment Tianjin Chengjian University State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University The Lyell Centre for Earth and Marine Science and Technology Institute for Infrastructure and EnvironmentHeriot-Watt University School of Naval Architecture &Mechanical-Electrical Engineering Zhejiang Ocean University

The interactions of cnoidal waves with a submerged quartercircular breakwater are investigated by a ReynoldsAveraged Navier–Stokes(RANS) flow solver with a Volume of Fluid(VOF) surface capturing scheme(RANSVOF) model. The vertical variation of the instantaneous velocity indicates that flow separation occurs at the boundary layer near the breakwater. The temporal evolution of the velocity and vorticity fields demonstrates vortex generation and shedding around the submerged quartercircular breakwater due to the flow separation. An empirical relationship between the vortex intensity and a few hydrodynamic parameters is proposed based on parametric analysis. In addition, the instantaneous and time-averaged vorticity fields reveal a pair of vortices of opposite signs at the breakwater which are expected to have significant effect on sediment entrainment, suspension, and transportation,therefore, scour on the leeside of the breakwater.

关键词： submerged quartercircular breakwater cnoidal wave flow separation vortex dynamics scour

Dietary fishmeal replacement by Clostridium autoethanogenum protein meal influences the nutritional and sensory quality of turbot(Scophthalmus maximus)via the TOR/AAR/AMPK pathways

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Animal Nutrition 2024年第3期18卷 84-95页

作者： Zezheng Qi Nan Bai qing Li Shihui Pan Min gu Marine College Shandong UniversityWeihaiShandongChina Key Laboratory of Modern Marine Ranching Technology of Weihai WeihaiShandongChina

Clostridium autoethanogenum protein(CAP)is a promising protein source for aquaculture;however,how CAP influences fish quality is worth extensive *** randomly allocated 630 turbot with initial body weights of about 180 g into 6 groups,with fishmeal-based control diet or diet with CAP replacing 15%(CAP15),30%(CAP30),45%(CAP45),60%(CAP60),or 75%(CAP75)of fishmeal *** a 70-d feeding trial,the fillet yield(P=0.015)and content of protein(P=0.017),collagen(P 0.05).By contrast,the muscle hardness increased linearly with increasing CAP(P=0.004),accompanied by linear reduction of muscle fiber area(P=0.003)and expression of myogenesis-related genes,including cathepsin D(ctsdP<0.001)and muscle ring finger protein 1(murf 1,P<0.001).Phosphorylation of protein kinase B(Akt,P<0.001),target of rapamycin(TOR,P=0.001),eukaryotic initiation factor 4E-binding protein 1(4E-BP1,P<0.001),and ribosomal protein S6(S6,P<0.001)decreased linearly;however,phosphorylation of AMP-activated protein kinase(AMPK,P<0.001),eukaryotic initiation factor 2α(eIF2α,P<0.001),and the abundance of activating transcription factor 4(ATF4,P<0.001)increased with increasing CAP,suggesting that the TOR signaling pathway was inhibited,and the amino acid response(AAR)and AMPK pathways were ***,expression of genes related to protein degradation,including myogenic factor 5(myf 5,P<0.001),myogenic differentiation(myod,P<0.001),paired box 7(pax 7,P<0.001),and ctsd(P<0.001),decreased linearly with increasing *** conclusion,CAP could be used to replace up to 15%of fishmeal without negatively impacting turbot ***,higher levels of CAP decreased fillet yield,muscle protein content,and muscle fiber diameter while increasing muscle hardness,which could be attributed to the inhibition of the TOR pathway and activation of the AAR and AMPK pathways.

关键词： Bacterial meal Clostridium autoethanogenum Turbot Fish quality Muscle growth

Personalization for Massive Product Innovation Using Open Architecture

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Chinese Journal of Mechanical Engineering 2018年第2期31卷 12-24页

作者： qing-Jin Peng Yun-Hui Liu Jian Zhang Pei-Hua gu Department of Mechanical Engineering University of Manitoba Department of Mechatronics Engineering Shantou University

Product innovation is creation of new concepts to plan and realize technological and functional details in the product to satisfy market and customer needs. One of the key drivers to product innovation is reactions of the product to users’ needs. Product innovation needs a cognitive design method based on needs of variant users for the product personalization. In this paper, an open concept is introduced to provide ways to meet user’s individual need in product lifespan. It is for industries to propose product concepts based on open sources, develop and support the product on the public capability. Using the open concept in the product architecture, called open?architecture product(OAP), can improve the product personalization leading to massive product innovation. To promote this promise of the OAP, effective methods are discussed for the OAP development. This paper introduces research on OAPs using adaptable design methods to meet product personalization. Adaptable design is based on the modular structure for product adaptability using function modules and adaptable interfaces. The proposed method provides solutions for planning modules and implementation of OAPs. Methods of OAP module planning, detail and interface design are described for transformation of product concepts into physical structures. A multiple?purpose electrical car is developed in a case study to show effectiveness of the proposed method.

关键词： Product design Personalization Massive innovation Open architecture Adaptable design

Joint Computing and Communication Resource Allocation for Edge Computing towards Huge LEO Networks

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China Communications 2022年第8期19卷 73-84页

作者： Min Jia Liang Zhang Jian Wu qing guo Xuemai gu Communication Research Center School of Electronics and Information EngineeringHarbin Institute of TechnologyHarbin 150080China

The satellite-terrestrial cooperative network is considered an emerging network architecture,which can adapt to various services and applications in the future communication *** recent years,the combination of satellite communication and Mobile Edge Computing(MEC)has become an emerging research *** edge computing can provide users with full coverage on-orbit computing services by deploying MEC servers on *** paper studies the task offloading of multi-user and multi-edge computing satellites and proposes a novel algorithm that joint task offloading and communication computing resource optimization(JTO-CCRO).The JTO-CCRO is decoupled into task offloading and resource allocation *** the mutual iteration of the two sub-problems,the system utility function can be further *** the task offloading sub-problem,it is first confirmed that the offloading problem is a game *** offloading strategy can be obtained from the Nash equilibrium *** confirm resource optimization sub-problem is a convex optimization problem that can be solved by the Lagrange multiplier *** shows that the JTO-CCRO algorithm can converge quickly and effectively reduce the system utility function.

关键词： satellite edge computing task offloading resource allocation potential game nash equilibrium

Regional changes in extreme heat events in China under stabilized 1.5℃ and 2.0℃ global warming

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Advances in Climate Change Research 2020年第3期11卷 198-209页

作者： ZHANG gu-Wei ZENG Gang Vedaste IYAKAREMYE YOU qing-Long Key Laboratory of Meteorological Disaster of Ministry of Education(KLME) Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science and TechnologyNanjing210044China Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai200433China

Extreme heat events(EHEs)have a significant impact on the social economy and human *** is a country with a large population and diverse terrain,and it is necessary to project future extreme heat changes in the *** study used a specially designed dataset,the Community Earth System Model(CESM)simulations,namely CESM low-warming,to investigate the EHEs in China under 1.5℃ and 2.0℃ global *** results indicate that the regional mean warming over China will exceed the global average,about 1.63℃ and 2.24℃ in 1.5℃ and 2.0℃ warmer *** to the present-day(1976–2005),the frequency and duration of the EHEs in South China are projected to increase the most among the *** example,the frequency of EHEs in South China at 1.5℃ and 2.0℃ warming will exceed 3 and 3.5 times the present-day ***,when global warming rises from 1.5℃ to 2.0℃,the increased impacts relative to the 1.5℃ warming level will be the lowest in South China(less than 40%),and the highest increased impacts are projected to appear in Northeast China(53%-84%)and Northwest China(53%–107%).The main reason for this situation is that compared with the 1.5℃ scenario,the upper zonal westerly in northern China weakens and the continental high pressure enhances under the 2.0℃ ***,limiting global warming at 1.5℃ instead of 2.0℃ is beneficial for eliminating extreme heat events,especially for Northeast China and Northwest China.

关键词： China Regional changes Extreme heat events 1.5℃and 2.0℃global warming CESM low-warming