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China Foundry 2024年第1期21卷 51-59页

作者： Dong Pan Qing-tao Guo Kai-lun Zhang Fu-zhi Yu Yu-ying Li Yu-bao Xiao State Key laboratory of Metal Materials for Marine Equipment and Application Anshan 114009LiaoningChina Ansteel Beijing research Institute Co. Ltd.Beijing 102200China

Electromagnetic stirring is one of the widely applied techniques to modify the quality of casting *** from conventional rotate stirring,the helical stirring is more professional in assisting multi-dimensional flow of molten metal and eliminating solidification *** this study,the single-winding helical stirring(SWHS)was introduced,offering advantages such as smaller volume and lower electromagnetic shielding compared to traditional helical stirring *** a comprehensive numerical simulation,the stirring parameters of SWHS were adjusted to yoke inclination angle of 43°and frequency of 12 *** higher electromagnetic force and flow velocity in drawing direction,as well as the lower temperature gradient induced by the SWHS,are positive factors for homogeneous solidification of *** experimental results on Al-8%Si alloy and 0.4%C-1.1%Mn steel demonstrate that compared to rotate stirring,the SWHS process can induce better billet quality and is more effective in accelerating the equiaxed expansion and reducing element *** SWHS process can enhance the equiaxed ratio of the billet by 58.3%and reduce segregation degree of carbon element by 10.97%.Consequently,SWHS holds great promise as a potential approach for improving the quality of continuous casting billets.

关键词： billet electromagnetic stirring helical solidification element segregation numerical simulation

Design of Resilient Sensor Networks Balancing Resilience and Efficiency

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International Journal of Disaster Risk Science 2024年第1期15卷 107-115页

作者： Sergey N.Vecherin Kiril D.Ratmanski Luke Hogewood Igor Linkov Cold Regions research and Engineering laboratory Engineering Research and Development CenterHanoverNH 03755USA Environmental laboratory Engineering Research and Development CenterVicksburgMS 39180USA

In recent years,the notion of resilience has been developed and applied in many technical areas,becoming exceptionally pertinent to disaster risk *** a disaster situation,accurate sensing information is the key to efficient recovery *** general,resilience aims to minimize the impact of disruptions to systems through the fast recovery of critical functionality,but resilient design may require redundancy and could increase *** this article,we describe a method based on binary linear programming for sensor network design balancing efficiency with *** application of the developed framework is demonstrated for the case of interior building surveillance utilizing infrared sensors in both twoand three-dimensional *** method provides optimal sensor placement,taking into account critical functionality and a desired level of resilience and considering sensor type and *** problem formulation,resilience requirements,and application of the optimization algorithm are described in *** of sensor locations with and without resilience requirements shows that resilient configuration requires redundancy in number of sensors and their intelligent *** tasks are successfully solved by the described method,which can be applied to strengthen the resilience of sensor networks by *** proposed methodology is suitable for large-scale optimization problems with many sensors and extensive coverage areas.

关键词： Binary linear programming Optimal sensor placement Redundant networks Resilience and efciency Resilient sensor networks

The olfactory system of Pieris brassicae caterpllars:from receptors to glomeruli

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Insect Science 2024年第2期31卷 469-488页

作者： Qi Wang Hans M.Smid Marcel Dicke Alexander Haverkamp laboratory of Entomology Wageningen University and ResearchWageningenthe Netherlands

Tolfactory system of adult lepidopterans is among the best described neuronal ***,comparatively little is known about the organization of the olfactory system in the larval stage of these ***,we explore the expression of olfactory receptors and the organization of olfactory sensory neurons in caterpillars of Pieris brassicae,a significant pest species in Europe and a well-studied species for its chemical *** describe the larval olfactory system in this species,we first analyzed the head transcriptome of third-instar larvae(L3)and identified 16 odorant receptors(ORs)including the OR coreceptor(Orco),13 ionotropic receptors(IRs),and 8 gustatory receptors(GRs).We then quantified the expression of these 16 ORs in different life stages,using qPCR,and found that the majority of ORs had significantly higher expression in the L4 stage than in the L3 and L5 stages,indicating that the larval olfactory system is not static throughout caterpillar *** an Orco-specific antibody,we identified all olfactory receptor neurons(ORNs)expressing the Orco protein in L3,L4,and L5 caterpillars and found a total of 34 Orco-positive ORNs,distributed among three sensilla on the *** number of Orco-positive ORNs did not differ among the three larval ***,we used retrograde axon tracing of the antennal nerve and identified a mean of 15 glomeruli in the larval antennal center(LAC),suggesting that the caterpillar olfactory system follows a similar design as the adult olfactory system,although with a lower numerical *** together,our results provide a detailed analysis of the larval olfactory neurons in P brassicae,highlighting both the differences as well as the commonalities with the adult olfactory *** findings contribute to a better understanding of the development of the olfactory system in insects and its life-stage-specific adaptations.

关键词： glomeruli larvae Lepidoptera odorant receptor olfactory receptor neurons sensilla

research progress and prospect of low-carbon biological technology for nitrate removal in wastewater treatment

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Frontiers of Environmental Science & Engineering 2024年第7期18卷 1-21页

作者： Ru Zheng Kuo Zhang Lingrui Kong Sitong Liu College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China Key laboratory of Water and Sediment Sciences Ministry of Education of ChinaBeijing 100871China Eco-Environment and Resource Efficiency research laboratory School of Environment and EnergyPeking University Shenzhen Graduate SchoolShenzhen 518055China

Wastewater treatment plants are the major energy consumers and significant sources of greenhouse gas emissions,among which biological nitrogen removal of wastewater is an important contributor to carbon ***,traditional heterotrophic denitrification still has the problems of excessive residual sludge and the requirement of external carbon ***,the development of innovative low-carbon nitrate removal technologies is *** review outlines the key roles of sulfur autotrophic denitrification and hydrogen autotrophic denitrification in low-carbon wastewater *** discovered nitrate/nitrite dependent anaerobic methane oxidation enables sustainable methane emission reduction and nitrogen removal by utilizing available methane in *** microorganisms exhibited a promising potential to achieve carbon-negative nitrate ***,the algal-bacterial symbiosis system and photogranules offer effective and prospective low-carbon options for nitrogen ***,the emerging nitrate removal technology of photoelectrotrophic denitrification and the underlying,photoelectron transfer mechanisms are ***,we summarize and prospect these technologies,highlighting that solar-driven biological nitrogen removal technology is a promising area for future sustainable wastewater *** review has important guiding significance for the design of low-carbon wastewater treatment systems.

关键词： Carbon emissions Low-carbon Biological nitrogen removal Denitrification

BjuIR:A multi-omics database with various tools for accelerating functional genomics research in Brassica juncea

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Plant Communications 2024年第8期5卷 96-99页

作者： Linna Zhang Jinyuan Xiao Congyuan Liang Yifan Chen Changchun Yu Xinle Zhao Jiawei Li Mingli Yan Qian Yang Hao Chen Zhongsong Liu Zhengjie Wan Zhiquan Yang Qing-Yong Yang National Key laboratory for Germplasm Innovation and Utilization of Horticultural Crops College of InformaticsHuazhong Agricultural UniversityWuhan 430070China Hubei Key laboratory of Agricultural Bioinformatics and Hubei Engineering Technology research Center of Agricultural Big Data College of InformaticsHuazhong Agricultural UniversityWuhan 430070China National Key laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China Yazhouwan National laboratory Sanya 572025China National Key laboratory for Germplasm Innovation and Utilization of Horticultural Crops College of Horticulture and Forestry SciencesHuazhong Agricultural UniversityWuhan 430070China Crop research Institute Hunan Academy of Agricultural SciencesChangsha 410125China College of Agronomy Hunan Agricultural UniversityChangsha 410128China

Dear Editor,Advances in high-throughput omics technologies,along with methodologies for integrating multi-omics datasets,have substantially enhanced the efficiency of identifying candidate genes in breeding(Gusev et al.,2018;Gupta et al.,2019).However,this process is often complex and *** address this challenge,databases that integrate extensive data and enable convenient and efficient functional genomics studies are being developed(Ma et al.,2021;Yang et al.,2023).

关键词： functional integrating convenient

The evolution of robotics:research and application progress of dental implant robotic systems

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International Journal of Oral Science 2024年第2期16卷 173-185页

作者： Chen Liu Yuchen Liu Rui Xie Zhiwen Li Shizhu Bai Yimin Zhao State Key laboratory of Oral&Maxillofacial Reconstruction and Regeneration Xi’anChina National Clinical research Center for Oral Diseases Xi’anChina Shaanxi Key laboratory of Stomatology Xi’anChina Digital Center School of StomatologyThe Fourth Military Medical UniversityXi’anChina

The use of robots to augment human capabilities and assist in work has long been an *** has been developing since the 1960s when the first industrial robot was *** technology has advanced,robotic-assisted surgery has shown numerous advantages,including more precision,efficiency,minimal invasiveness,and safety than is possible with conventional techniques,which are research hotspots and cutting-edge *** article reviewed the history of medical robot development and seminal research papers about current research *** the autonomous dental implant robotic system as an example,the advantages and prospects of medical robotic systems would be discussed which would provide a reference for future research.

关键词： robot robotic application

Decoding the fish genome opens a new era in important trait research and molecular breeding in China

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Science China(Life Sciences) 2024年第10期67卷 2064-2083页

作者： Qian Zhou Jialin Wang Jiongtang Li Zhangfan Chen Na Wang Ming Li Lei Wang Yufeng Si Sheng Lu Zhongkai Cui Xuhui Liu Songlin Chen State Key laboratory of Mariculture Biobreeding and Sustainable Goods Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdaoShandong 266071China laboratory for Marine Fisheries Science and Food Production Processes Qingdao Marine Science and Technology CenterQingdaoShandong 266237China Key laboratory of Aquatic Genomics Ministry of Agriculture and Rural AffairsBeijing Key Laboratory of Fishery BiotechnologyChinese Academy of Fishery SciencesBeijing 100041China

Aquaculture represents the fastest-growing global food production sector,as it has become an essential component of the global food *** has the world's largest aquaculture industry in terms of production ***,the sustainable development of fish culture is hindered by several concerns,including germplasm degradation and disease *** practice of genomic breeding,which relies heavily on genome information and genotypephenotype relationships,has significant potential for increasing the efficiency of aquaculture *** 2014,the completion of the genome sequencing and annotation of the Chinese tongue sole signified the beginning of the fish genomics era in *** then,domestic researchers have made dramatic progress in functional genomic *** date,the genomes of more than 60 species of fish in China have been assembled and *** on these reference genomes,evolutionary,comparative,and functional genomic studies have revolutionized our understanding of a wide range of biologically and economically important traits of fishes,including growth and development,sex determination,disease resistance,metamorphosis,and ***,genomic tools and breeding techniques such as SNP arrays,genomic selection,and genome editing have greatly accelerated genetic improvement through the incorporation of functional genomic information into breeding *** review aims to summarize the current status,advances,and perspectives of the genome resources,genomic study of important traits,and genomic breeding techniques of fish in *** review will provide aquaculture researchers,fish breeders,and farmers with updated information concerning fish genomic research and breeding *** summary will help to promote the genetic improvement of production traits and thus will support the sustainable development of fish aquaculture.

关键词： fish genomics economic traits genomic selection genome editing genomic breeding

Slicing capacity-centered mode selection and resource optimization for network-assisted full-duplex cell-free distributed massive MIMO systems

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Science China(Information Sciences) 2024年第1期67卷 203-220页

作者： Jie WANG Jiamin LI Pengcheng ZHU Dongming WANG Hongbiao ZHANG Yue HAO Bin SHENG National Mobile Communications research laboratory Southeast University 2. Purple Mountain Laboratories China Mobile research Institute

Network-assisted full-duplex(NAFD) cell-free distributed massive multiple-input multipleoutput(MIMO) systems enable uplink(UL) and downlink(DL) communications within the same timefrequency resources,which potentially reduce latency by avoiding the overhead of switching UL/DL ***,how to choose UL/DL modes remains an important factor affecting system *** the dramatic increase in the number of users and access points(APs),massive access brings significant overhead in the mode ***,the different quality of service(QoS) among users also makes the effective utilization of resources *** one of the most promising technologies in sixth-generation(6G),network slicing enables the adaptive configuration of limited UL/DL resources through the resource isolation assisted NAFD ***,we propose a slicing capacity-centered *** this scheme,APs are motivated by slicing requirements and associated slices to form different *** mode selection and resource allocation are performed within each subsystem to reduce overhead and improve resource *** implement this scheme efficiently,a double-layer deep reinforcement learning(DRL)mechanism is used to realize the joint optimization of mode selection and resource *** results show that the slicing capacity-centered scheme can effectively improve resource utilization and reduce overhead.

关键词： network-assisted full-duplex network slicing mode selection resource optimization deep reinforcement learning

Physical exercise and traumatic brain injury: is it question of time?

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Neural Regeneration research 2024年第3期19卷 475-476页

作者： Valentina Mastrorilli Stefano Farioli Vecchioli Institute of biochemistry and Cell Biology Institute of Biochemistry and Cell BiologyNational Research Council(IBBC/CNR)MonterotondoRomeItaly Plaisant S.R.L. RomeItaly

Is it better to be safe than sorry?This Hamletic dilemma has always stimulated medical-scientific debates in numerous fields of *** among these,the preventive-therapeutic approach to the treatment of brain trauma is one of the most striking *** brain injury(TBI)is a leading cause of brain damage among young and elderly populations with a very high hospitalization and death *** is characterized by two pathologically distinct but strictly consequential phases:a first characterized by an immediate and highly variable mechanical dysfunction of the brain tissue,which involves widespread cell death and tissue degeneration,followed by a second phase which can last from days to even years depending on the severity of the TBI and the patient’s pre-existing health *** processes,including inflammatory phenomena,oxidative stress associated with metabolic,vascular,and neuro-modulatory deficits,are very often responsible for neuro-motor and psychological deficits leading to long-term disabilities(Kaur and Sharma,2018).

关键词： injury striking modulator

Analysis method and experimental study of ice accumulation detection signal based on Lamb waves

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Chinese Journal of Aeronautics 2024年第8期37卷 388-403页

作者： Yanxin ZHANG Hongjian ZHANG Xian YI Binrui WU Xianlei GUAN Jianjun XIONG Key laboratory of Icing and Anti/De-icing China Aerodynamics Research and Development CenterMianyang 621000China State Key laboratory of Aerodynamics China Aerodynamics Research and Development CenterMianyang 621000China

A quantitative identification method for in-flight icing has the capability to significantly enhance the safety of aircraft *** guided waves have the unique advantage of detecting icing in a relatively large area,but quantitative identification of ice layers is a *** this paper,a quantitative identification method of ice accumulation based on ultrasonic guided waves is ***,a simulation model for the wave dynamics of piezoelectric coupling in three dimensions is established to analyze the propagation characteristics of Lamb waves in a structure consisting of an aluminum plate and an ice *** wavelet transform method is utilized to extract the Time of Flight(ToF)or Time of Delay(ToD)of S_(0)/B_(1) mode waves,which serves as a characteristic parameter to precisely determine and assess the level of ice ***,an experimental system is developed to evaluate the feasibility of Lamb waves-based icing real-time detection in the presence of spray ***,a combination of the Hampel median filter and the moving average filter is developed to analyze ToF/ToD *** simulation results reveal a positive correlation between geometric dimensions(length,width,thickness)of the ice layer and ToF/ToD of B1 mode waves,indicating their potential as indicators for quantifying ice *** results of real-time icing detection indicate that ToF/ToD will reach greater peak values with the growth of the arbitrary-shaped ice layer until saturation to effectively predict the simulation *** study lays a foundation for the practical application of quantitative icing detection via ultrasonic guided waves.

关键词： Ice Ice accumulation Ultrasonic sensor Ultrasonic guided wave Lamb wave Wavelet transform