检索结果-南通市图书馆

Optimizing the key parameter to accelerate the recovery of AMOC under a rapid increase of greenhouse gas forcing

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2025年第1期18卷 39-45页

作者： Haolan ren Fei Zheng Tingwei Cao Qiang Wang International Center for Climate and Environment Science(ICCES) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina College of Oceanography Hohai UniversityNanjingChina CAS Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology(Qingdao)QingdaoChina

Atlantic Meridional Overturning Circulation(AMOC)plays a central role in long-term climate variations through its heat and freshwater transports,which can collapse under a rapid increase of greenhouse gas forcing in climate *** studies have suggested that the deviation of model parameters is one of the major factors in inducing inaccurate AMOC *** this work,with a low-resolution earth system model,the authors try to explore whether a reasonable adjustment of the key model parameter can help to re-establish the AMOC after its *** a new optimization strategy,the extra freshwater flux(FWF)parameter is determined to be the dominant one affecting the AMOC’s *** traditional ensemble optimal interpolation(EnOI)data assimilation and new machine learning methods are adopted to optimize the FWF parameter in an abrupt 4×CO_(2) forcing experiment to improve the adaptability of model parameters and accelerate the recovery of *** results show that,under an abrupt 4×CO_(2) forcing in millennial simulations,the AMOC will first collapse and then re-establish by the default FWF parameter ***,during the parameter adjustment process,the saltier and colder sea water over the North Atlantic region are the dominant factors in usefully improving the adaptability of the FWF parameter and accelerating the recovery of AMOC,according to their physical relationship with FWF on the interdecadal timescale.

关键词： Recovery of AMOC 4×CO_(2) forcing Key parameter Parameter estimation Data assimilation Machine learning

Long noncoding RNAs in gastric cancer: From molecular dissection to clinical application

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2020年第24期26卷 3401-3412页

作者： Yue Gao Jun-Wei Wang jia-Yi ren Mian Guo Cheng-Wang Guo Shang-Wei ning Shan Yu College of Bioinformatics Science and Technology Harbin Medical UniversityHarbin 150081Heilongjiang ProvinceChina Department of Respiratory Medicine The Second Affiliated Hospital of Harbin Medical UniversityHarbin 150081Heilongjiang ProvinceChina Department of Neurosurgery the Second Affiliated Hospital of Harbin Medical UniversityHarbin 150081Heilongjiang ProvinceChina Department of Gastroenterology and Gastrosurgery Gansu Wuwei Tumor HospitalWuwei 733000Gansu ProvinceChina Department of Pathology the Second Affiliated Hospital of Harbin Medical UniversityHarbin 150081Heilongjiang ProvinceChina

Long noncoding RNAs(lncRNAs)are important regulators of cell processes that are usually dysregulated in gastric cancer(GC).Based on their high specificity and ease of detection in tissues and body fluids,increasing attention has spurred the study of the roles of lncRNAs in GC ***,it is necessary to elucidate the molecular mechanisms and further explore the clinical applications of lncRNAs in *** this review,we summarize current knowledge to examine dysregulated lncRNAs in GC and their underlying molecular mechanisms and activities in GC,which involve microRNA sponging,mRNA stability,genetic variants,alternative splicing,transcription factor binding,and epigenetic *** significantly,the potential of lncRNAs as prognostic,circulating,and drug-resistant biomarkers for GC is also *** review highlights the method of dissecting molecular mechanisms to explore the clinical application of lncRNAs in ***,this review offers assistance in using lncRNAs as novel candidates for molecular mechanisms and for the identification of revolutionary biomarkers for GC.

关键词： Gastric cancer Long noncoding RNAs Molecular mechanism Biomarkers Therapeutic target Drug resistance

Influence of two-stage harvesting on the properties of cold-pressed rapeseed(Brassica napus L.)oils

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2023年第1期22卷 265-278页

作者： ning ning HU Bing BAI Chen-yang LI Xiao-hua KUAI Jie HE Han-zi ren Yi-lin WANG Bo jia Cai-hua ZHOU Guang-sheng ZHAO Si-ming Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River(Ministry of Agriculture and Rural Affairs) College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhan 430070P.R.China Key Laboratory of Environment Correlative Dietology(Ministry of Education) College of Food Science and TechnologyHuazhong Agricultural UniversityWuhan 430070P.R.China School of Life Science and Technology Wuhan Polytechnic UniversityWuhan 430023P.R.China College of Engineering Huazhong Agricultural UniversityWuhan 430070P.R.China

Rapeseed(Brassica napus L.)harvesting method is critical since it significantly determines the seed yield,oil quality,and industrial *** study investigated the influences of harvesting methods on the quality of cold-pressed rapeseed oil of two *** color,peroxide value(POV),tocopherol content,fatty acid composition,and polarity of total polyphenols(PTP)contents of two rapeseed varieties in Huanggang and Xiangyang were compared through artificially simulated combined harvesting and two-stage *** showed significant differences in the quality of rapeseed oil between the two harvesting *** red value(R-value),POV,total tocopherol contents,linoleic and linolenic acid content,and PTP content of the pressed rapeseed oil prepared by the combined harvesting method were about 27.6,5.7,15.8,2.0,0.5,and 28.6%lower than those of the oil produced from the two-stage harvesting method,*** and Huayouza62 performed better in the two regions and two varieties,*** sum up,the rapeseed oil obtained 41–44 days after final flowering of combined harvesting,35 days after final flowering,and six days of post-ripening of the two-stage harvesting had the best quality.

关键词： rapeseed two-stage harvesting combined harvesting oil quality

Large Eddy Simulation of a Vortex Ring Impacting a Bump

在线全文

学校读者我要写书评

暂无评论

Advances in Applied Mathematics and Mechanics 2014年第3期6卷 261-280页

作者： Heng ren ning Zhao Xi-Yun Lu Department of Modern Mechanics University of Science and Technology of ChinaHefei 230026AnhuiChina Department of Aerodynamics Nanjing University of Aeronautics and AstronauticsNanjing 210016JiangsuChina

A vortex ring impacting a three-dimensional bump is studied using large eddy simulation for a Reynolds number Re=4×104 based on the initial diameter and translational speed of the vortex *** effects of bump height and vortex core thickness for thin and thick vortex rings on the vortical flow phenomena and the underlying physical mechanisms are *** on the analysis of the evolution of vortical structures,two typical kinds of vortical structures,i.e.,the wrapping vortices and the hair-pin vortices,are identified and play an important role in the flow state *** boundary vorticity flux is analyzed to reveal the mechanism of the vorticity generation on the bump *** circulation of the primary vortex ring reasonably elucidates some typical phases of flow ***,the analysis of turbulent kinetic energy reveals the transition from laminar to turbulent *** results obtained in this study provide physical insight into the understanding of the mechanisms relevant to the flow evolution and the flow transition to turbulent state.

关键词： Large eddy simulation vortex ring vortical structure turbulent state.

Review of risk factors,clinical manifestations,rapid diagnosis,and emergency treatment of neonatal perioperative pneumothorax

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第33期10卷 12066-12076页

作者： Xu Zhang ning Zhang Yue-Yi ren Department of Heart Center Women's and Children's Hospital Affiliated to Qingdao UniversityQingdao 266034Shandong ProvinceChina Department of Clinical Laboratory Women's and Children's Hospital Affiliated to Qingdao UniversityQingdao 266034Shandong ProvinceChina

Perioperative neonatal pneumothorax(NP)is rare but very *** of the surgeries and treatments in the neonatal period are time-limited or emergent,and there are often some risk factors for pneumothorax before ***,surgeons and anesthesiologists need to identify possible risk factors for pneumothorax before surgery in preterm babies,patients receiving mechanical ventilation and those with underlying lung *** clinical presentation of NP is nonspecific,and patients may rapidly develop life-threatening complications if not promptly diagnosed and *** review highlights recent progress in the identification of risk factors,clinical manifestations,diagnosis and management of NP during the perioperative period.

关键词： Neonatal Perioperative Pneumothorax Risk factors Clinical manifestations Diagnosis Management

Fast Carrier Selection of JPEG Steganography Appropriate for Application

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2020年第5期25卷 614-624页

作者： Weixiang ren Yibo Xu Liming Zhai Lina Wang Ju jia the Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of EducationWuhan UniversityWuhan 430000China the School of Cyber Science and Engineering Wuhan UniversityWuhan 430000China Micropattern Co.Ltd. Wuhan 430000China

In recent years,the improvement of the security of steganography mainly involves not only carrier security but also distortion *** the actual environment,the existing method of carrier selection is limited by its complex algorithm and slow running speed,making it not appropriate for rapid *** study proposes a method for selecting carriers and improving the security of *** images are decompressed to spatial *** correlation coefficients between two adjacent pixels in the horizontal,vertical,counter diagonal,and major diagonal directions are *** mean value of the four correlation coefficients is used to evaluate the security of each JPEG *** images with low correlation coefficients are considered safe carriers and used for embedding in our *** experimental results indicate that the stego images generated from the selected carriers exhibit a higher anti-steganalysis capability than those generated from the randomly selected *** the premise of the same security level,the images with low correlation coefficients have a high *** algorithm has a very fast running speed,and the running time of a 2048×2048 image is less than 1 s.

关键词： steganography steganalysis carrier JPEG correlation coefficients

Tunable non-Markovian and quantum coherence in the single-qubit dephasing noise channel

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年

作者： Na-Na Zhang Chao-Yi Wu Xu Zhou Qi-Yuan Liu Cheng-Ge Liu Yong-Rui Guo ren-Pu Li School of Optoelectronic Engineering Chongqing University of Posts and Telecommunications Department of Physics Applied Optics Beijing Area Major Laboratory Beijing Normal University

In this paper, we construct a single-qubit dephasing noise channel based on the nuclear magnetic resonance（NMR） system by employing the bath-engineering technology, and achieve the construction of the tunable non-Markovian environment in the dephasing noise channel. Our findings indicate that for the single-qubit system, the transition of system dynamics from Markovian to non-Markovian can be achieved by adjusting the base frequency of the noise power spectrum. However, the base frequency corresponding to this phase transition point is not fixed, and there is a certain relationship between it and the total evolution time of the single-qubit system. Through our research, we discovered a fundamental relationship: if the single-qubit system dynamics undergoe a transition from Markovian to non-Markovian at ω0within 0-2t ms, shortening the evolution time to 0-t ms results in an increase of the phase transition point to 2ω0. This insight offers crucial guidance for artificially crafting non-Markovian environments across arbitrary time scales in single-qubit systems, and it is not limited by the type of noise. Apart from system dynamics, quantum coherence is also a focal point of our research. We find that when the system dynamics exhibit non-Markovian behavior, the quantum coherence of the single-qubit system experiences revivals. Notably, the timing of these coherence revivals aligns with the instants of the non-Markovianity enhancement. Therefore, our research also serves as a pivotal foundation for the artificial manipulation and realization of quantum coherence revivals within diverse single-qubit systems.

关键词：

Reliability study of custom designed ADC for the jiangmen underground neutrino observatory

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2020年第2期4卷 203-207页

作者： Ru-yi Jin Jun Hu jia-yi ren Zhe ning Xiao-shan jiang State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of Sciences(CAS)Beijing 100049China University of Chinese Academy of Sciences(UCAS) Beijing 100049China

Objective The jiangmen underground neutrino observatory(JUNO)is the largest and most precise liquid scintillator detector under construction in the south of *** front-end readout electronics system will be installed very close to the photomultiplier tubes under ***,the system’s absolute reliability is *** an important piece,the failure rate of the custom designed analog-to-digital convertor(ADC)must be *** The Arrhenius High Temperature Operating Life(HTOL)model is usually used to calculate the standard reliability value failure rate(λ).A temperature acceleration test of the ADC is performed with a 115℃ambient temperature based on a custom aging *** performance of ADC is compared before and after aging,and the most significant bit(MSB)of the digital output is monitored during the *** The result of a 2400-hour-long test shows that there were no *** upper limit of the failure rate is calculated as 5.8FIT,which can be added to the failure rate of other components to meet the overall failure rate requirements(84FIT).Conclusion With the test system,we established a method based on the HTOL model to obtain the upper limit of the ADC reliability for overall failure rate calculation in *** method can be applied to the reliability measurement for any other custom designed *** experiment can be repeated with a new set of parameters to get a satisfactory failure rate according to other overall system requirements.

关键词： ADC Reliability HTOL Failure rate

Proportion integral-type active disturbance rejection generalized predictive control for distillation process based on grey wolf optimization parameter tuning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第9期35卷 234-244页

作者： jia ren Zengqiang Chen Mingwei Sun Qinglin Sun Zenghui Wang College of Artificial Intelligence Nankai UniversityTianjin 300350China Key Lab of Intelligent Robotics of Tianjin Tianjin 300350China Department of Electrical and Mining Engineering University of South AfricaFlorida 1710South Africa

The high-purity distillation column system is strongly nonlinear and coupled,which makes it difficult to *** disturbance rejection control(ADRC)has been widely used in distillation systems,but it has limitations in controlling distillation systems with large time delays since ADRC employs ESO and feedback control law to estimate the total disturbance of the system without considering the large time *** paper designs a proportion integral-type active disturbance rejection generalized predictive control(PI-ADRGPC)algorithm to control the distillation column system with large time *** replaces the PD controller in ADRC with a proportion integral-type generalized predictive control(PI-GPC),thereby improving the performance of control systems with large time *** the proposed controller has many parameters and is difficult to tune,this paper proposes to use the grey wolf optimization(GWO)to tune these parameters,whose structure can also be used by other intelligent optimization *** performance of GWO tuned PI-ADRGPC is compared with the control performance of GWO tuned ADRC method,multi-verse optimizer(MVO)tuned PI-ADRGPC and MVO tuned *** simulation results show that the proposed strategy can track reference well and has a good disturbance rejection performance.

关键词： Proportion integral-type active disturbance rejection generalized predictive control Grey wolf optimization Parameter tuning Distillation Process control Prediction