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Origins and transports of the low-salinity coastal water in the southwestern Yellow Sea

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Acta Oceanologica Sinica 2018年第4期37卷 1-11页

作者： ZHU ping wu Hui State Key laboratory of Estuarine and Coastal Research East China Normal University School of Marine Sciences East China Normal University

In the southwestern Yellow Sea there is a low-salinity and turbid coastal water,the Subei Coastal Water（SCW）.The origins of freshwater contents and thus the dissolved terrigenous nutrients in the SCW have been debated for *** this study,we used a well-validated numerical model to quantify the contributions of multiple rivers,i.e.,the Changjiang River in the south and the multiple Subei local rivers（SLRs） in the north,in forming this yearround low-salinity coastal *** is found that the freshwater contents in the SCW is dominated by the Changjiang River south of 33.5°N,by the SLRs north of 34.5°N,and by both sources in 33.5°–34.5°***,the Changjiang River contributes ~70% in the dry season and ~80% in the wet season of the total freshwater contents in the SCW,*** driving the Changjiang River Plume to flow northward is the tidal residual current,which can even overwhelm the wind effects in winter *** residual currents turn offshore near the Old Yellow River Delta（OYRD） by the collision of the two tidal wave systems,which transport the freshwater from both sources into the interior Yellow *** age experiments show that it takes 50–150 d for the Changjiang River Plume to reach the SCW in the spring and summer seasons,thus there is a 2-month lag between the maximum freshwater content in SCW and the peak Changjiang River *** the winter and autumn seasons,the low salinity in inner SCW is the remnant Changjiang River diluted water arrived in the previous seasons.

关键词： Subei Coastal Water origins river plume numerical modeling

A DFT study on brittle-to-ductile transition of D022-TiAl3 using multi-doping and strain-engineered effects

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Journal of Materials Science & Technology 2020年第16期47卷 180-192页

作者： Boon Teoh Tan Shunnian wu Franklin Anariba ping wu Entropic Interface Croup Engineering Product DevelopmentSingapore University of Technology and DesignSingapore Materials Surface Group Science and Math Affiliated to Engineering Product DevelopmentSingapore University of Technology and DesignSingapore

In this work,the thermodynamic,mechanical properties and electronic behaviors of D022-TiAl3 doped with W and 15 groupⅣM(M=C,Ge,Pb,Si and Sn)dopants are investigated by DFT *** established that ductility can be improved using multi-doping approach and revealed the mechanisms behind such brittle-to-ductile *** addition,it is found that there is linearity between changes in Young’s modulus and tensile/compre s sive strain *** alternate insight into brittle-to-ductile transition during ductile mode cutting of brittle materials is proposed.

关键词： Multi-doped TiAl3 Brittle-to-Ductile transition Elastic properties First-principles calculation Strain-engineered

Fossicking for microbial defense system:novel antiviral immunity

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Signal Transduction and Targeted Therapy 2020年第1期5卷 193-195页

作者： ping Lin Qun wu Min wu Department of Biomedical Sciences School of Medicine and Health SciencesUniversity of North DakotaGrand ForksND 58203USA Wound Trauma Medical Center State Key Laboratory of TraumaBurns and Combined InjuryDaping HospitalArmy Medical UniversityChongqing 400042China Department of Pediatrics Ruijin Hospital affiliated to Shanghai Jiao Tong University School of Medicine ShanghaiShanghaiChina

A recent paper in Science by Gao et *** a comprehensive comparative genomics approach to identify new antiviral systems in prokaryotes for combating invading phages.1 These defense systems manifest a variety of host defense mechanisms by utilizing enzymatic activities including reverse transcriptases,adenosine deaminases of RNA editing,and retroms(Fig.1).Some of these antiviral systems not only enrich our understanding the phage-bacterial interaction but also represent a versatile,powerful tool for biomedical research and biotechnological applications.

关键词： immunity utilizing versatile

Distributed event region fault-tolerance based on weighted distance for wireless sensor networks

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Journal of Systems Engineering and Electronics 2009年第6期20卷 1351-1360页

作者： Li ping Li Hong wu Min School of Information Science and Engineering Central South Univ. Changsha 410083 P. R. China

Event region detection is the important application for wireless sensor networks（WSNs）, where the existing faulty sensors would lead to drastic deterioration of network quality of *** single-moment nodes fault-tolerance, a novel distributed fault-tolerant detection algorithm named distributed fault-tolerance based on weighted distance（DFWD） is proposed, which exploits the spatial correlation among sensor nodes and their redundant *** sensor networks, neighborhood sensor nodes will be endowed with different relative weights respectively according to the distances between them and the central *** syncretized the weighted information of dual-neighborhood nodes appropriately, it is reasonable to decide the ultimate status of the central sensor ***, readings of faulty sensors would be corrected during this *** results demonstrate that the DFWD has a higher fault detection accuracy compared with other algorithms, and when the sensor fault probability is 10%, the DFWD can still correct more than 91% faulty sensor nodes, which significantly improves the performance of the whole sensor network.

关键词： event region detection weighted distance distributed fault-tolerance wireless sensor network.

Ligand Effects in Dinitrogen Hydrogenation of Binuclear Zirconium Complexes

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Chinese Journal of Structural Chemistry 2008年第2期27卷 238-244页

作者： LIU Cai-ping wu Ke-Chen State Key laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

In this work, we report a theoretical exploration of the ground-state electronic structures and molecular vibrational properties of a series of binuclear zirconium complexes in the framework of density functional theory （DFT） employing the B3LYP hybrid functional. The calculated results reveal that the electronic structure of the complex [（η^5-C5Me5）2Zr]2（μ^2, η^2, η^2-N2） is unfavorable for hydrogenation due to the exclusion of side-on dinitrogen in the LUMO＋ 1 molecular orbital as compared with the reactant 1 [（η^5-C5Me4H）2Zr]2（μ2,η^2,η^2-N2）. Besides, the structural feature of the hypothetical intermediate 1′, [（η^5C5Me4H）2Zr]2（μ2,η^2, η^2-N2）-n2, clearly implies the possibility of further hydrogenation. In addition, the distinguishing of vibrational modes of experimental intermediate 2, [（η^5-C5Me4H）2ZrH]2（μ2,η^2,η^2-N2H2）, indicates that the asymmetric stretching of Zr-N and Zr-H leads to dissociation. Moreover, the vibrational intensity of Zr-H is stronger than that of Zr-N. Therefore, it can be predicted that excess hydrogen atmosphere is necessary to ensure the dissociation of Zr-N bonds.

关键词： density functional theory binuclear zirconium complexes electronic structure vibrational properties dinitrogen hydrogenation

Wind Power Generation Variations and Aggregations

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CSEE Journal of Power and Energy Systems 2022年第1期8卷 17-38页

作者： Cong wu Xiao-ping Zhang Michael Sterling Department of Energy Strategy and Planning State Grid Energy Research InstituteBeijingChina Systems Engineering School of EngineeringUniversity of BirminghamBirmingham B152TTU.K Department of Electronic Electrical and Systems EngineeringSchool of EngineeringUniversity of BirminghamBirmingham B152TTU.K

Climate and weather-propelled wind power is characterized by significant spatial and temporal *** has been substantiated that the variability of wind power,in addition to contributing hugely to the instability of power grids,can also send the balancing costs of electricity markets *** studies on the same establish that curtailment of such variability can be achieved through the geographic aggregation of various widespread production sites;however,there exists a dearth of comprehensive evaluation concerning different levels/scales of such aggregation,especially from a global *** paper primarily offers a fundamental understanding of the relationship between the wind power variations and aggregations from a systematic viewpoint based on extensive wind power data,thereby enabling the benefits of these aggregations to be quantified from a state scale ranging up to a global ***,a meticulous analysis of the wind power variations is undertaken at 6 different levels by converting the 7-year hourly meteorological re-analysis data with a high spatial resolution of 0.25◦×0.25◦(approximate 28 km×28 km)into a wind power series ***,the proposed assessment framework employs a coefficient of variation of wind power as well as a standard deviation of wind power ramping rate to quantify the variations of wind power and wind power ramping rate to exhibit the characteristics and benefits yielded by the wind power aggregation at 6 different levels.A system planning example is adopted to illustrate the correlation between the coefficient of variation reduction of wind power and investment reduction,thereby emphasizing the benefits pertaining to significant investment reduction via ***,a wind power duration curve is used to exemplify the availability of wind power aggregated at different ***,the results provide insights into devising a universal approach towards the deployment of wind power,prin

关键词： Energy quality meteorological re-analysis data wind power aggregation wind power ramping rate wind power variation wind power variability

Teacher-Student Training Approach Using an Adaptive Gain Mask for LSTM-Based Speech Enhancement in the Airborne Noise Environment

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Chinese Journal of Electronics 2023年第4期32卷 882-895页

作者： HUANG ping wu Yafeng School of Power and Energy Northwestern Polytechnical University

Research on speech enhancement algorithms in the airborne environment is of great significance to the security of airborne systems. Recently, the research focus of speech enhancement has turned from conventional unsupervised algorithms, like the log minimum mean square error estimator(log-MMSE), to the state-ofthe-art masking-based long short-term memory(LSTM)method. However, each method has its characteristics and limitations, so they cannot always handle noise well. Besides, the requirements of clean speech and noise data for training a supervised speech enhancement model are difficult to satisfy in the real-world airborne ***, in this work, to fully utilize the advantages of those two different methods without any data restrictions,we propose a novel adaptive gain mask(AGM) based teacher-student training approach for speech enhancement. In our method, the AGM, as a robust learning target for the student model, is devised by incorporating the estimated ideal ratio mask from the teacher model into the procedure of the log-MMSE approach. To get an appropriate tradeoff between the two methods, we adaptively update the AGM using a recursive weighting coefficient. Experiments on the real airborne data show that the proposed AGM-based method outperforms other baselines in terms of all essential objective metrics evaluated in this paper.

关键词： Training Measurement Deep learning Adaptation models Atmospheric modeling Mean square error methods Interference

Hot deformation behavior and microstructure evolution of Be/2024Al composites

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International Journal of Minerals,Metallurgy and Materials 2023年第11期30卷 2245-2258页

作者： Yixiao Xia Zeyang Kuang ping Zhu Boyu Ju Guoqin Chen ping wu Wenshu Yang Gaohui wu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Key laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Key laboratory of Advanced Science and Technology on High Power Microwave Xi'an 710024China Northwest Institute of Nuclear Technology Xi'an 710024China

The high temperature compression test of Be/2024Al composites with 62wt%Be was conducted at 500–575℃ and strain rate of0.003–0.1 s^(-1).The strain-compensated Arrhenius model and modified Johnson–Cook model were introduced to predict the hot deformation behavior of Be/2024Al *** result shows that the activation energy of Be/2024Al composites was 363.364 k J·mol^(-1).Compared with composites reinforced with traditional ceramics,Be/2024Al composites can be deformed with ultra-high content of reinforcement,attributing to the deformable property of Be *** average relative error of the two models shows that modified Johnson–Cook model was more suitable for low temperature condition while strain-compensated Arrhenius model was more suitable for high temperature *** processing map was generated and a hot extrusion experiment was conducted according to the map.A comparation of the microstructure of Be/2024Al composites before and after extrusion shows that the Be particle deformed coordinately with the matrix and elongated at the extrusion direction.

关键词： Be/Al composites hot deformation behavior constitutive model hot extrusion

Sub-channel interference cancellation in SVD-based MIMO system

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 34-37页

作者： wu ping LI Li-hua ZHANG ping Beijing University of Posts and Telecommunications Beijing 100876 China

For singular value decomposition （SVD）-based multiple input multiple output （MIMO） systems, implicit channel state information （CSI） incurs interferences amongst sub-channels if the CSI at the transmitter is not explicit. An improved SVD-based MIMO which can fully cancel the inter sub-channel interferences by reconstructing the transmitter- receiver system matrix on interferences analysis is provided. Simulation results indicate that the proposed algorithm outperforms the traditional SVD-based MIMO in a large degree.

关键词： MIMO systems SVD interference cancellation (IC) CSI feedback