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Journal of Integrative Plant Biology 2021年第4期63卷 613-627页

作者： dawei Dai Zeyang Ma Rentao Song State Key Laboratory of Plant Physiology and Biochemistry National Maize Improvement CenterBeijing Key Laboratory of Crop Genetic ImprovementJoint International Research Laboratory of Crop Molecular BreedingCollege of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China Shanghai Key Laboratory of Bio-Energy Crops Plant Science CenterSchool of Life SciencesShanghai UniversityShanghai 200444China

Recent breakthroughs in transcriptome analysis and gene characterization have provided valuable resources and information about the maize endosperm developmental *** high temporal-resolution transcriptome analysis has yielded unprecedented access to information about the genetic control of seed *** spatial transcriptome analysis using laser-capture microdissection has revealed the expression patterns of specific populations of genes in the four major endosperm compartments:the basal endosperm transfer layer(BETL),aleurone layer(AL),starchy endosperm(SE),and embryo-surrounding region(ESR).Although the overall picture of the transcriptional regulatory network of endosperm development remains fragmentary,there have been some exciting advances,such as the identification of OPAQUE11(O11)as a central hub of the maize endosperm regulatory network connecting endosperm development,nutrient metabolism,and stress responses,and the discovery that the endosperm adjacent to scutellum(EAS)serves as a dynamic interface for endosperm-embryo *** addition,several genes that function in BETL development,AL differentiation,and the endosperm cell cycle have been identified,such as ZmSWEET4c,Thk1,and Dek15,***,we focus on current advances in understanding the molecular factors involved in BETL,AL,SE,ESR,and EAS development,including the specific transcriptional regulatory networks that function in each compartment during endosperm development.

关键词： endosperm development maize transcriptional regulatory network

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Synthesis of Aryl Hydrazines via Cul/BMPO Catalyzed Cross-Coupling ofAryl Halides with Hydrazine Hydrate in Water

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Chinese Journal of Chemistry 2018年第11期36卷 1003-1006页

作者： Siripuram Vijay Kumar dawei Ma State Key Laboratory of Bioorganic and Natural Products Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences345 Lingling LuShanghai 200032China

The N,N’‐bis(2,6‐dimethylphenyl)oxalamide was discovered as a powerful ligand for Cu‐catalyzed cross‐coupling of aryl halides with hydrazine hydrate, leading to the formation of a variety of aryl hydrazines at 80 oC in water under the assistance of K3PO4 and 4 mol% cetyltrimethylammonium bromide from aryl bromides and aryl iodides. Good to excellent yields were observed in most cases.

关键词： hydrazine hydrate cross‐coupling aryl halides ligand effects copper synthetic methods

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Cascading Failure Propagation Simulation in Integrated Electricity and Natural Gas Systems

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Journal of Modern Power Systems and Clean Energy 2020年第5期8卷 961-970页

作者： Zhejing Bao Qihong Zhang Lei Wu dawei Chen College of Electrical Engineering Zhejiang UniversityHangzhou 310027China Department of Electrical and Computer Engineering Stevens Institute of TechnologyHobokenNJ 07901USA

The sharp increase in the total installed capacity of natural gas generators has intensified the dynamic interaction between the electricity and natural gas systems,which could induce cascading failure propagation across the two systems that deserves intensive *** the distinct time response behaviors of the two systems,this paper discusses an integrated simulation approach to simulate the cascading failure propagation process of integrated electricity and natural gas systems(IEGSs).On one hand,considering instantaneous re-distribution of power flows after the occurrence of disturbance or failure,the steady-state AC power flow model is *** the other hand,gas transmission dynamics are represented by dynamic model to capture the details of its transition *** interactions between the two systems,intensified by energy coupling components(such as gas-fired generator and electricity-driven gas compressor)as well as the switching among the operation modes of compressors during the cascading failure propagation process,are *** IEGS composed of the IEEE 30-bus electricity system and a 14-node 15-pipeline gas system is established to illustrate the effectiveness of the proposed simulation approach,in which two energy sub-systems are coupled by compressor and gas-fired *** results clearly demonstrate that heterogeneous interactions between electricity and gas systems would trigger the cascading failure propagation between the two coupling systems.

关键词： Cascading failure propagation integrated electricity and natural gas system(IEGS) gas compressor transmission dynamics

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On the Professionalization and Collective-system Construction of the Service Group for the Aged

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学术界 2015年第6期 282-286页

作者： Liu dawei School of Social Development East China Normal University

During the third plenary session of the 18 th Central Committee of the CPC,actively responding to the aging of population and accelerating the construction of the system of elderly care service was put forward. As for improving the system of elderly care service,the key point is to emphasize professionalization. Up till now,the national occupational qualifications of Nursing Assistant for the Aged have already been formulated,in which there are four levels — elementary,media,high and professional. However,such regulation is far from enough. Through the professionalization and collective- system construction of the service group for the aged,the imbalance between supply and demand of the service for the aged is relieved to some degree; at the same time,it is helpful for promoting the sense of identity and stability of the service group for the aged.

关键词： service group for the aged professionalization collective-system construction

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Ultrahigh-fidelity spatial mode quantum gates in high-dimensional space by diffractive deep neural networks

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Light(Science & Applications) 2024年第1期13卷 55-67页

作者： Qianke Wang Jun Liu dawei Lyu Jian Wang Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan430074HubeiChina Optics Valley Laboratory Wuhan430074HubeiChina

While the spatial mode of photons is widely used in quantum cryptography, its potential for quantum computation remains largely unexplored. Here, we showcase the use of the multi-dimensional spatial mode of photons to construct a series of high-dimensional quantum gates, achieved through the use of diffractive deep neural networks (D2NNs). Notably, our gates demonstrate high fidelity of up to 99.6(2)%, as characterized by quantum process tomography. Our experimental implementation of these gates involves a programmable array of phase layers in a compact and scalable device, capable of performing complex operations or even quantum circuits. We also demonstrate the efficacy of the D2NN gates by successfully implementing the Deutsch algorithm and propose an intelligent deployment protocol that involves self-configuration and self-optimization. Moreover, we conduct a comparative analysis of the D2NN gate’s performance to the wave-front matching approach. Overall, our work opens a door for designing specific quantum gates using deep learning, with the potential for reliable execution of quantum computation.

关键词： quantum dimensional operations

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Relationship between Hardness and Deformation during Cold Rolling Process of Complex Profles

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Chinese Journal of Mechanical Engineering 2023年第5期36卷 315-329页

作者： dawei Zhang Linghao Hu Bingkun Liu Shengdun Zhao Xi’an Key Laboratory of Intelligent Equipment and Control School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China

The hardening on surface of complex profles such as thread and spline manufactured by cold rolling can efectively improve the mechanical properties and surface quality of rolled parts. The distribution of hardness in superfcial layer is closely related to the deformation by rolling. To establish the suitable correlation model for describing the relationship between strain and hardness during cold rolling forming process of complex profles is helpful to the optimization of rolling parameters and improvement of rolling process. In this study, a physical analog experiment refecting the uneven deformation during complex-profle rolling process has been extracted and designed, and then the large date set (more than 400 data points) of training samples refecting the local deformation characteristics of complexprofle rolling have been obtained. Several types of polynomials and power functions were adopted in regression analysis, and the regression correlation models of 45# steel were evaluated by the single-pass and multi-pass physical analog experiments and the complex-profle rolling experiment. The results indicated that the predicting accuracy of polynomial regression model is better in the strain range (i.e., ε 1.2) of training samples can be well described by power regression model;so the correlation relationship between strain and hardness during complex-profle rolling process of 45# steel can be characterized by a segmented function such as third-order polynomial in the range ε 1.2;and the predicting error of the regression model by segmented function is less than 10%.

关键词： Complex profle Cold rolling Multi passes Equivalent strain Vickers hardness

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Deep-Sea Geohazards in the South China Sea

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Journal of Ocean University of China 2018年第1期17卷 1-7页

作者： WU Shiguo WANG dawei VOKER David Laboratory of Marine Geophysics and Georeource Institute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049China MARUM Center for Marine Environmental Sciences University of BremenBremen 28359Germany

Various geological processes and features that might inflict hazards identified in the South China Sea by using new technologies and *** features include submarine landslides,pockmark fields,shallow free gas,gas hydrates,mud diapirs and earthquake tsunami,which are widely distributed in the continental slope and reefal islands of the South China *** the study and assessment of geohazards in the South China Sea came into operation only recently,advances in various aspects are evolving at full speed to comply with National Marine Strategy and‘the Belt and Road’*** characteristics of geohazards in deep-water seafloor of the South China Sea are summarized based on new scientific *** progress is aimed to aid ongoing deep-water drilling activities and decrease geological risks in ocean development.

关键词： deep-sea geohazards South China Sea

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Synthesis of comb bipolymers and their pour point depressing properties

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Petroleum Science 2014年第1期11卷 155-160页

作者： Zhang Changqiao Gao Congcong Gao Fengfeng Wang Jian Zhang dawei Wang Yan Xu dawei School of Chemistry and Chemical Engineering Shandong University Shandong Quality Certification Centre Shandong Product Quality Supervision & Inspection Research Institute

A bipolymer maleic anhydride-methyl acrylate （MAMA） was synthesized from maleic anhydride and methyl acrylate based on molecular *** further reacted with oleylamine or octadecyl alcohol to generate two comb polymers called Oleamide-MAMA （NMAMA） and OctadecanolMAMA （OMAMA）,*** structure of both the polymers was confirmed by their infrared spectral analysis （IR）,gel permeation chromatography analysis （GPC） and differential scanning calorimeter （DSC）.Moreover,the pour point depressing （PPD） properties of these comb polymers were examined *** results showed that besides the molecular weight and concentration of the polymers,the length of side chains and the number of functional groups also had great influence on the pour point depressing *** π bonds and hydrogen bonds between depressants were the key factors for improving the pour point depressing *** results suggest that both OMAMA and NMAMA are potential pour point depressants for industry.

关键词： Maleic anhydride comb polymers pour point depressant hydrogen bonds molecular simulation

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Splitting and placement of data-intensive applications with machine learning for power system in cloud computing

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Digital Communications and Networks 2022年第4期8卷 476-484页

作者： Zhanyang Xu dawei Zhu Jinhui Chen Baohua Yu School of Computer and Software Nanjing University of Information Science and TechnologyNanjingChina College of Information Science and Technology Shihezi UniversityXinjiangChina

Aiming to meet the growing demand for observation and analysis in power systems that based on Internet of Things(IoT),machine learning technology has been adopted to deal with the data-intensive power electronics applications in *** feeding previous power electronic data into the learning model,accurate information is drawn,and the quality of IoT-based power services is ***,the data-intensive electronic applications with machine learning are split into numerous data/control constrained tasks by workflow *** efficient execution of this data-intensive Power Workflow(PW)needs massive computing resources,which are available in the cloud ***,the execution efficiency of PW decreases due to inappropriate sub-task and data *** addition,the power consumption explodes due to massive data *** address these challenges,a PW placement method named PWP is ***,the Non-dominated Sorting Differential Evolution(NSDE)is used to generate placement *** simulation experiments show that PWP achieves the best trade-off among data acquisition time,power consumption,load distribution and privacy preservation,confirming that PWP is effective for the placement problem.

关键词： IoT-based power system Cloud Workflow Machine learning NSDE

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Cu/Picolinamides-Catalyzed Coupling of (Hetero) aryl Halides with Secondary Phosphine Oxides and Phosphite

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Chinese Journal of Chemistry 2021年第11期39卷 2957-2961页

作者： Chao Fang Bangguo Wei dawei Ma Department of Natural Medicine School of PharmacyFudan University826 Zhangheng RoadShanghai201203 China State Key Laboratory of Bioorganic&Natural Products Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling LuShanghai200032 China

Some 4-hydroxy-picolinic acid derived amides were revealed as more efficient ligands for Cu-catalyzed coupling of(hetero)aryl halides with secondary phosphine oxides and *** 3—5 mol%CuI and ligands were required to e... 详细信息

关键词： Synthetic methods Cross-Coupling Aryl halides Copper Aryl phosphine oxides

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