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A 2-Stage Strategy for Non-Stationary Signal Prediction and Recovery Using Iterative Filtering and Neural Network

Journal of Computer Science & Technology 2019年第2期34卷 318-338页

作者： Feng zhou Hao-Min zhou Zhi-hua Yang Li-hua Yang School of Information Science Guangdong University of Finance and Economics Guangzhou 510320 China School of Mathematics Georgia Institute of Technology Atlanta GA 30332 U.S.A. Guangdong Province Key Laboratory of Computational Science Guangzhou 510275 China School of Mathematics Sun Yat-sen University Guangzhou 510275 China

Predicting the future information and recovering the missing data for time series are two vital tasks faced in various application *** are often subjected to big challenges,especially when the signal is nonlinear and nonstationary which is common in *** this paper,we propose a hybrid 2-stage approach,named IF2FNN,to predict(including short-term and long-term predictions)and recover the general types of time *** the first stage,we decompose the original non-stationary series into several“quasi stationary”intrinsic mode functions(IMFs)by the iterative filtering(IF)*** the second stage,all of the IMFs are fed as the inputs to the factorization machine based neural network model to perform the prediction and *** test the strategy on five datasets including an artificial constructed signal(ACS),and four real-world signals:the length of day(LOD),the northern hemisphere land-ocean temperature index(NHLTI),the troposphere monthly mean temperature(TMMT),and the national association of securities dealers automated quotations index(NASDAQ).The results are compared with those obtained from the other prevailing *** experiments indicate that under the same conditions,the proposed method outperforms the others for prediction and recovery according to various metrics such as mean absolute error(MAE),root mean square error(RMSE),and mean absolute percentage error(MAPE).

关键词： iterative filtering factorization machine neural network time series data recovery

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Rehearsal:learning from prediction to decision

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Frontiers of Computer Science 2022年第4期16卷 1-3页

作者： Zhi-hua zhou National Key Laboratory for Novel Software Technology Nanjing UniversityNanjing210023China

Machine learning[1]studies focus mostly on prediction,where a model is built from a set of observational data formaking correct predictions on unseen *** has beenaddressed very well by modem techniques such as deeplea... 详细信息

关键词： such has see

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A brief introduction to weakly supervised learning

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National Science Review 2018年第1期5卷 44-53页

作者： Zhi-hua zhou National Key Laboratory for Novel Software Technology Nanjing University

Supervised learning techniques construct predictive models by learning from a large number of training examples, where each training example has a label indicating its ground-truth output. Though current techniques have achieved great success; it is noteworthy that in many tasks it is difficult to get strong supervision information like fully ground-truth labels due to the high cost of the data-labeling process. Thus,it is desirable for machine-learning techniques to work with weak supervision. This article reviews some research progress of weakly supervised learning, focusing on three typical types of weak supervision:incomplete supervision, where only a subset of training data is given with labels; inexact supervision, where the training data are given with only coarse-grained labels; and inaccurate supervision, where the given labels are not always ground-truth.

关键词： machine learning weakly supervised learning supervised learning

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The Ergodicity of a Class of Almost Anosov Systems

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Acta Mathematica Sinica,English Series 2013年第1期29卷 193-198页

作者： Yun hua zhou College of Mathematics and Statistics Chongqing University

In this paper, we prove that some volume-preserving almost Anosov systems are ergodic if they are essentially accessible. The key idea is that there are stable and unstable manifolds with uniform size on the orbits Of... 详细信息

关键词： Ergodicity almost Anosov essential accessibility

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Controllable nitridation of Ta_(2)_(O5) in molten salts for enhanced photocatalysis

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1703-1710页

作者： Jing zhou dan-dan Nie Xian-bo Jin Wei Xiao College of Chemistry and Molecular Sciences Hubei Key Laboratory of Eletrochermical Power SourexWuhan Lniversitwuhan 430072China Sschool of Resouwce and Einvironmental Sciences Hubei lnternational Scientifie and Teehnological Cooperation Base of Sustainable Rexource and EnergyWuhan UniversityWuhan 430072China

Pyrolysis of the Ta_(2)_(O5)/melamine mixture in molten chlorides is herein demonstrated as a facile and controllable method to nitridize and functionalize Ta_(2)_(O5).The influence of the stoichiometry and composition of Ta_(2)_(O5)/melamine in molten salts on the nitridation process is rationalized to ensure the controllable preparation of Ta_(3)N_(5) and Ta_(3)N_(5)/*** characterization results,including scanning electron microscopy,transmission electron microscopy,elemental mapping,X-ray photoelectron spectroscopy,and photoluminescence spectroscopy,all confirm the existence of the Ta_(3)N_(5)/TaON heterojunction,in which the TaON nanoparticles are closely anchored to the Ta_(3)N_(5) *** from its composition and structure,the Ta_(3)N_(5)/TaON composites show enhanced photocatalytic activity for the degradation of methylene *** present study highlights that the molten salt method using a solid nitrogen source can be a new technique for rationalizing the design of nitrides and oxynitrides.

关键词： molten salts photocatalysis Ta_(3)N_(5) TaON heterojunction

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Electrocatalytic oxygen reduction performances of surface Ag granular packs electrodeposited from dual-phase Ag_(35.5)Zn_(64.5) precursor alloys by triangle wave potential cycling

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Rare Metals 2021年第12期40卷 3531-3542页

作者： Jia-Yu Luo Piao-Piao Han Zhen-hua dan Tao Tang Feng-Xiang Qin Hui Chang Lian zhou College of Materials Science and Engineering and Tech Institute for Advanced Materials Nanjing Tech UniversityNanjing 210009China State Key Laboratory of Advanced Metals and Materials University of Science and Technology BeijingBeijing 110083China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

Surface Ag granular packs(SAgPs) have been fabricated from dual-phase Ag_(35.5)Zn_(64.5) precursor alloy consisting of both e and c phases by using a facile one-step triangle wave potential cycling in 0.5 mol·L^(-1) *** the continuous potential cyclic sweeping, the c phases preferentially dissolve during the anodic scan and dominant reduction reactions of Ag cations lead to redeposition and accumulation of Ag atoms together to form SAg Ps during cathodic scan. The e phases stay inactive to form a continuous skeleton in the inner regions. SAg Ps with an average particle size of 94-129 nm can be obtained at scan rates of 25, 50 and 100 mV·s^(-1) for 100 triangle wave potential cycles. SAgPs formed at a scan rate of 50 mV·s^(-1) exhibit superior oxygen reduction reaction performances with the onset potential of 0.93 V, half-wave potential of 0.72 V and an electron transfer number of *** above-mentioned SAgPs have superior stabilities as ORR catalysts.

关键词： Surface Ag granular packs Dual-phase Ag_(35.5)Zn_(64.5)precursor alloy Triangle wave potential cycling Oxygen reduction reaction catalysts Selective dissolution Intermetallic phases

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NUMERICAL ANALYSIS OF THE 3-D FLOW FIELD OF PRESSURE ATOMIZERS WITH V-SHAPED CUT AT ORIFICE

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Journal of Hydrodynamics 2011年第2期23卷 187-192页

作者： zhou hua School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai 200092 China

Axisymmetric liquid jets have been studied extensively for more than one century, while non-axisymmetric jets are also very common in engineering applications but attract less concern. Based on Eulerian fluid-fluid model in Fluent software, this article analysizes the 3-D flow fields of pressure atomizers with V-shaped cut at orifice, which will result in a non-axisymmetric liquid jet. Flow rate analysis and jet structure analysis are carried out, the results show that the flow rate can be formulated by adding a correction coefficient to the formula of inviscid axisymmetric jets in atomization regime, when the Weber number is low enough to make the flow fall out of atomization regime, and the jet structure together with the flow rate formula will change. Analysis shows that the evolution of the spray and therefore the structure of the liquid jet are affected much by relative velocity and the local volume fraction of liquid phase.

关键词： flow rate fraction distribution gas-liquid interference non-axisymmetric liquid jet pressure atomizer

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Metabolic pathway modulation by olanzapine:Multitarget approach for treating violent aggression in patients with schizophrenia

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World Journal of Psychiatry 2025年第1期15卷 37-53页

作者： Yan-Ning Song Shuang Xia Zhi Sun Yong-Chao Chen Lu Jiao Wen-hua Wan Hong-Wei Zhang Xiao Guo hua Guo Shou-Feng Jia Xiao-Xin Li Shi-Xian Cao Li-Bin Fu Meng-Meng Liu Tian zhou Lv-Feng Zhang Qing-Quan Jia Department of Pharmacy The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina Department of Pharmacy The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Department of Pharmacy Zhumadian First People's HospitalZhumadian 463000Henan ProvinceChina Scientific Education Section The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina Department of Psychiatry The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina Clinical Laboratory The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina Publicity Division The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina

BACKGROUND The use of network pharmacology and blood metabolomics to study the patho-genesis of violent aggression in patients with schizophrenia and the related drug mechanisms of action provides new directions for reducing the risk of violent aggression and optimizing treatment *** To explore the metabolic regulatory mechanism of olanzapine in treating patients with schizophrenia with a moderate to high risk of violent *** Metabolomic technology was used to screen differentially abundant metabolites in patients with schizophrenia with a moderate to high risk of violent aggression before and after olanzapine treatment,and the related metabolic pathways were *** pharmacology was used to establish protein-protein interaction networks of the core targets of *** Ontology functional analysis and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis were subsequently *** Compared with the healthy group,the patients with schizophrenia group presented significant changes in the levels of 24 metabolites related to the disruption of 9 metabolic pathways,among which the key pathways were the alanine,aspartate and glutamate metabolism and arginine biosynthesis *** treatment with olanzapine,the levels of 10 differentially abundant metabolites were significantly reversed in patients with *** effectively regulated six metabolic pathways,among which the key pathways were alanine,aspartate and glutamate metabolism and arginine biosynthesis *** core targets of olanzapine were involved in several key *** The metabolic pathways of alanine,aspartate,and glutamate metabolism and arginine biosynthesis are the key pathways involved in olanzapine treatment for aggressive schizophrenia.

关键词： Schizophrenia Violent aggression Olanzapine Metabolomics Network pharmacology

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Young children with multidrug-resistant epilepsy and vagus nerve stimulation responding to perampanel: A case report

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World Journal of Clinical Cases 2022年第11期10卷 3511-3517页

作者： hua Yang dan Yu Department of Pediatrics West China Second University HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Perampanel(PER),a third-generation antiepileptic drug,is a selective and noncompetitiveα-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor antagonist,and has been approved for the treatment of adults and adolescents with focal ***,there are only a few studies about the efficacy and tolerability of PER in young children with multidrug-resistant *** this case,we aimed to share our clinical experience in this *** SUMMARY A 4-year-old boy without perinatal asphyxia and familial history of epilepsy began to have ictal seizures from age 14 mo,with jerky movement of four limbs and head *** multifocal discharge and background activity were recorded through electroencephalography,and no pathogenic mutation was found in the whole exome sequencing for the patient and his *** had received valproate,levetiracetam,topiramate,oxcarbazepine,clonazepam and lacosamide sequentially at different times,but he still had frequent seizures even after vagus nerve stimulation(VNS)*** was diagnosed with idiopathic multidrug-resistant ***,his seizure frequency was significantly reduced after PER administration in a dose-dependent manner,and better cognitive behavior was *** addition,the adverse reactions of anger and aggression also *** PER is effective as add-on therapy for young children with multidrug-resistant epilepsy who have previously undergone VNS implantation.

关键词： Perampanel Young children Drug-resistant epilepsy Vagus nerve stimulation Case report

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Progress of continuously rotating detonation engines

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Chinese Journal of Aeronautics 2016年第1期29卷 15-29页

作者： zhou Rui Wu dan Wang Jianping Center for Combustion and Propulsion College of Engineering Peking University Center for Applied Physics and Technology Peking University State Key Laboratory for Turbulence & Complex Systems Peking University

Continuously rotating detonation engine （CRDE） is a focus for concern in the field of aerospace propulsion. It has several advantages, including one-initiation, high thermal efficiency and simple structure. Due to these characteristics, it is expected to bring revolutionary advance- ments to aviation and aerospace propulsion systems and now has drawn much attention throughout the world. In this paper, an overview of the development of CRDE is given from several aspects： basic concepts, applications, experimental studies, numerical simulations, and so on. Representative results and outstanding contributions are summarized and the unresolved issues for further engi- neerin~ applications of CRDE are 13rovided.

关键词： Aerospace Continuously rotatingdetonation CRDE Detonation engine Propulsion system

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