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| 1 | Plasmonic tip internally excited via an azimuthal vector beam for surface enhanced Raman spectroscopy显示文摘The synergy of a plasmonic tip and fiber-based structure light field excitation can provide a powerful tool for Raman examination. Here, we present a method of Raman spectrum enhancement with an Ag-nanoparticles(Ag-NPs)-coated fiber probe internally excited via an azimuthal vector beam(AVB), which is directly generated in a few-mode fiber by using an acoustically induced fiber grating. Theoretical analysis shows that gap mode can be effectively generated on the surface of the Ag-NPs-coated fiber probe excited via an AVB. The experimental result shows that the intensity of Raman signal obtained with analyte molecules of malachite green by exciting the Ag-NPs-coated fiber probe via an AVB is approximately eight times as strong as that via the linear polarization beam(LPB), and the activity of the AVB-excited fiber probe can reach 10^-11 mol∕L, which cannot be achieved by LPB excitation.Moreover, the time stability and reliability are also examined, respectively. | Min Liu Wending Zhang Fan fan Lu Tianyang Xue Xin Li Lu Zhang Dong Mao Ligang Huang Feng Gao Ting Mei Jianlin Zhao | 2019 | Photonics Research2019，7，5： | 3 |
| 2 | CM-Droid: Secure Container for Android Password Misuse Vulnerability显示文摘Android applications are associated with a large amount of sensitive data,therefore application developers use encryption algorithms to provide user data encryption,authentication and data integrity protection.However,application developers do not have the knowledge of cryptography,thus the cryptographic algorithm may not be used correctly.As a result,security vulnerabilities are generated.Based on the previous studies,this paper summarizes the characteristics of password misuse vulnerability of Android application software,establishes an evaluation model to rate the security level of the risk of password misuse vulnerability and develops a repair strategy for password misuse vulnerability.And on this basis,this paper designs and implements a secure container for Android application software password misuse vulnerability:CM-Droid. | Wen Zhang Keyue Li Tianyang Li Shaozhang Niu Zhenguang Gao | 2019 | Computers, Materials & Continua2019，，4： | 1 |
| 3 | Extremely low friction on gold surface with surfactant molecules induced by surface potential显示文摘An extremely low friction state was observed on the gold surface induced by applying a specific negative potential in cationic surfactant solution.The friction force showed a remarkable reduction from 8.3 to 3.5×10−2 nN(reduced by 99.6%)with increasing the period of negative applied potential,and the final friction coefficient could reduce down to 3×10−4.The extremely low friction state was robust,and it also exhibited an excellent load bearing capacity,which cannot be damaged by a high load.Moreover,the extremely low friction state achieved under negative applied potential could keep stable even after the removal of potential,but failed in a short time,once a specific positive potential was applied.It was demonstrated that there was a stable electro-adsorption of surfactant molecules on the gold surface induced by applying a negative potential,leading to the formation of a bilayer structure on the gold surface.The hydration layers of the bilayer on the gold surface and micelles on the silica probe provided a shear plane with an extremely low shear strength,leading to the extremely low friction state on the gold surface.This study provides a method to achieve extremely low friction state by applied potential. | Tianyang GAO Jinjin LI Weiqi WANG Jianbin LUO | 2023 | Friction2023，11，4： | 1 |
| 4 | Modeling and SOC estimation of lithium iron phosphate battery considering capacity loss显示文摘Modeling and state of charge(SOC)estimation of Lithium cells are crucial techniques of the lithium battery management system.The modeling is extremely complicated as the operating status of lithium battery is affected by temperature,current,cycle number,discharge depth and other factors.This paper studies the modeling of lithium iron phosphate battery based on the Thevenin’s equivalent circuit and a method to identify the open circuit voltage,resistance and capacitance in the model is proposed.To improve the accuracy of the lithium battery model,a capacity estimation algorithm considering the capacity loss during the battery’s life cycle.In addition,this paper solves the SOC estimation issue of the lithium battery caused by the uncertain noise using the extended Kalman filtering(EKF)algorithm.A simulation model of actual lithium batteries is designed in Matlab/Simulink and the simulation results verify the accuracy of the model under different operating modes. | Junhui Li Fengjie Gao Gangui Yan Tianyang Zhang Jianlin Li | 2018 | Protection and Control of Modern Power Systems2018，3，1： | 1 |
| 5 | Prediction of cognitive scores by joint use of movie-watching fMRI connectivity and eye tracking via Attention-CensNet显示文摘Background:Brain functional connectivity under the naturalistic paradigm has been shown to be better at predicting individual behaviors than other brain states,such as rest and doing tasks.Nevertheless,the state-of-the-art methods have found it difcult to achieve desirable results from movie watching paradigm functional magnetic resonance imaging(mfMRI)-induced brain functional connectivity,especially when there are fewer datasets.Incorporating other physical measurements into the prediction method may enhance accuracy.Eye tracking,becoming popular due to its portability and lower expense,can provide abundant behavioral features related to the output of human's cognition,and thus might supplement the mfMRI in observing participants'subconscious behaviors.However,there are very few studies on how to effectively integrate the multimodal information to strengthen the performance by a unified framework.objective:A fusion approach with mfMRI and eye tracking,based on convolution with edge-node switching in graph neural networks(CensNet),is proposed in this article.Methods:In this graph model,participants are designated as nodes,mfMRI derived functional connectivity as node features,and different eye-tracking features are used to compute similarity between participants to construct heterogeneous graph edges.By taking multiple graphs as different channels,we introduce squeeze-and-excitation attention module to CensNet(A-CensNet)to integrate graph embeddings from multiple channels into one.Results:The proposed model outperforms those using a single modality and single channel,and state-of-the-art methods.Conclusions:The results indicate that brain functional activities and eye behaviors might complement each other in interpreting trait-like phenotypes. | Jiaxing Gao Lin Zhao Tianyang Zhong Changhe Li Zhibin He Yaonei Wei Shu Zhang Lei Guo Tianming Liu Junwei Han Xi Jiang Tuo Zhang | 2023 | Psychoradiology2023，3，1： | 0 |
| 6 | Determination of Total Flavonoids in Acanthopanax senticosus(Rupr. et Maxim.) Harms by Enzymolysis and Its Technological Optimization显示文摘In order to optimize the ultrasonic extraction technique for the total flavonoid of leaf yellows plus, the contents of 21 leaf yellows plus total flavonoid from four regions in Heilongjiang Province were comparatively analyzed. The ultrasonic extraction technology was optimized by Box-Behnken response surface method, and the total flavonoid content of 21 kinds of Acanthopanax senticosus(Rupr. et Maxim.) Harms from different producing areas were analyzed by cluster analysis. The optimal process conditions were determined as ultrasonic time 30 min, solid-liquid ratio 1 : 12 and ultrasonic power 250 W, and the average yield of the total flavonoid was 1.453 mg·g^ (-1). By optimizing the ultrasonic-assisted extraction method, the total flavonoid content from different producing areas was compared in the experiment, which provided certain data support for the optimization of the extraction process in the future and laid a certain theoretical foundation for the quality analysis of Chinese medicinal materials. | Li Xinzhi Wang Yudan Wang Meiliang Liu Tianyang Gao Ruihua Qiu Youwen Zhang Shunjie | 2024 | Journal of Northeast Agricultural University(English Edition)2024，31，1： | 0 |
| 7 | Research on motor rotation anomaly detection based on improved VMD algorithm显示文摘Purpose–The electromechanical brake system is leading the latest development trend in railway braking technology.The tolerance stack-up generated during the assembly and production process catalyzes the slight geometric dimensioning and tolerancing between the motor stator and rotor inside the electromechanical cylinder.The tolerance leads to imprecise brake control,so it is necessary to diagnose the fault of the motor in the fully assembled electromechanical brake system.This paper aims to present improved variational mode decomposition(VMD)algorithm,which endeavors to elucidate and push the boundaries of mechanical synchronicity problems within the realm of the electromechanical brake system.Design/methodology/approach–The VMD algorithm plays a pivotal role in the preliminary phase,employing mode decomposition techniques to decompose the motor speed signals.Afterward,the error energy algorithm precision is utilized to extract abnormal features,leveraging the practical intrinsic mode functions,eliminating extraneous noise and enhancing the signal’s fidelity.This refined signal then becomes the basis for fault analysis.In the analytical step,the cepstrum is employed to calculate the formant and envelope of the reconstructed signal.By scrutinizing the formant and envelope,the fault point within the electromechanical brake system is precisely identified,contributing to a sophisticated and accurate fault diagnosis.Findings–This paper innovatively uses the VMD algorithm for the modal decomposition of electromechanical brake(EMB)motor speed signals and combines it with the error energy algorithm to achieve abnormal feature extraction.The signal is reconstructed according to the effective intrinsic mode functions(IMFS)component of removing noise,and the formant and envelope are calculated by cepstrum to locate the fault point.Experiments show that the empirical mode decomposition(EMD)algorithm can effectively decompose the original speed signal.After feature extraction,signal enhancement and fault identification,the motor mechanical fault point can be accurately located.This fault diagnosis method is an effective fault diagnosis algorithm suitable for EMB systems.Originality/value–By using this improved VMD algorithm,the electromechanical brake system can precisely identify the rotational anomaly of the motor.This method can offer an online diagnosis analysis function during operation and contribute to an automated factory inspection strategy while parts are assembled.Compared with the conventional motor diagnosis method,this improved VMD algorithm can eliminate the need for additional acceleration sensors and save hardware costs.Moreover,the accumulation of online detection functions helps improve the reliability of train electromechanical braking systems. | Fuzhao Chen Zhilei Chen Qian Chen Tianyang Gao Mingyan Dai Xiang Zhang Lin Sun | 2024 | Railway Sciences2024，3，1： | 0 |
| 8 | JARID2 coordinates with the NuRD complex to facilitate breast tumorigenesis through response to adipocyte-derived leptin显示文摘Background Proteins containing the Jumonji C(JmjC)domain participated in tumorigenesis and cancer progression.However,the mechanisms underlying this effect are still poorly understood.Our objective was to investigate the role of Jumonji and the AT-rich interaction domain-containing 2(JARID2)—a JmjC family protein—in breast cancer,as well as its latent association with obesity.Methods Immunohistochemistry,The Cancer Genome Atlas,Gene Expression Omnibus,and other databases were used to analyze the expression of JARID2 in breast cancer cells.Growth curve,5-ethynyl-2-deoxyuridine(EdU),colony formation,and cell invasion experiments were used to detect whether JARID2 affected breast cancer cell proliferation and invasion.Spheroidization-based experiments and xenotumor transplantation in NOD/SCID mice were used to examine the association between JARID2 and breast cancer stemness.RNA-sequencing,Kyoto Encyclopedia of Genes and Genomes,and Gene Set Enrichment Analysis were used to identify the cell processes in which JARID2 participates.Immunoaffinity purification and silver staining mass spectrometry were conducted to search for proteins that might interact with JARID2.The results were further verified using co-immunoprecipitation and glutathione S-transferase(GST)pull-down experiments.Using chromatin immunoprecipitation(ChIP)sequencing,we sought the target genes that JARID2 and metastasis-associated protein 1(MTA1)jointly regulated;the results were validated by ChIP-PCR,quantitative ChIP(qChIP)and ChIP-reChIP assays.A coculture experiment was used to explore the interactions between breast cancer cells and adipocytes.Results In this study,we found that JARID2 was highly expressed in multiple types of cancer including breast cancer.JARID2 promoted glycolysis,lipid metabolism,proliferation,invasion,and stemness of breast cancer cells.Furthermore,JARID2 physically interacted with the nucleosome remodeling and deacetylase(NuRD)complex,transcriptionally repressing a series of tumor suppressor genes such as BRCA2 DNA repair associated(BRCA2),RB transcriptional corepressor 1(RB1),and inositol polyphosphate-4-phosphatase type II B(INPP4B).Additionally,JARID2 expression was regulated by the obesity-associated adipokine leptin via Janus kinase 2/signal transducer and activator of transcription 3(JAK2/STAT3)pathway in the breast cancer microenvironment.Analysis of various online databases also indicated that JARID2/MTA1 was associated with a poor prognosis of breast cancer.Conclusion Our data indicated that JARID2 promoted breast tumorigenesis and development,confirming JARID2 as a target for cancer treatment. | Wei Liu Yi Zeng Xinhui Hao Xin Wang Jiaxiang Liu Tianyang Gao Mengdi Wang Jingyao Zhang Miaomiao Huo Ting Hu Tianyu Ma Die Zhang Xu Teng Hefen Yu Min Zhang Baowen Yuan Wei Huang Yunkai Yang Yan Wang | 2023 | Cancer Communications2023，43，10： | 0 |
| 9 | Color myth:anthocyanins reactions and enological approaches achieving their stabilization in the aging process of red wine显示文摘Color is a crucial sensory indicator of wine quality.However,changes in anthocyanin concentration and profile occur during wine aging,resulting in noticeable reductions in chroma and shifts in hue from purple to brick red.This is because monomeric anthocyanins degrade and derivative anthocyanins form.The rate of color changes can vary depending on complex factors,such as the anthocyanin content of the must,oenological technology,and environmental conditions,which makes the management of red wine color evolution challenging.To address this issue,appropriate winemaking techniques are required to achieve an elegant wine color.This review summarizes the mechanisms related to anthocyanin stability,including glycosylation,acetylation,and derivatization.The review also discusses factors influencing red wine color fading for specific grape varieties and wine appellations,offering time-and cost-efficient techniques to accelerate anthocyanin derivatization and color stabilization. | Siqi Cheng Tianyang Wu Jie Gao Xiaoyu Han Weidong Huang Yilin You Jicheng Zhan | 2023 | Food Innovation and Advances2023，2，4： | 0 |
| 10 | Scalable Cu(Ⅱ)-mediated intramolecular dehydrogenative phenol-phenol coupling:Concise synthesis of enantiopure axially chiral homo-and hetero-diphenols显示文摘An intramolecular dehydrogenative homo-and hetero-coupling of phenols has been successfully developed for quick preparation of enantiopure axial diphenols under mild Cu(Ⅱ)-mediated conditions,using((4 S,5 S)-2,2-dimethyl-1,3-dioxolane-4,5-diyl)dimethanol as the chiral auxiliary.The commercially available(R)-α-met hylbenzy la mine was identified as the best amine ligand for Cu(Ⅱ) in the reactions.A variety of homo/hetero bis-dihydroxylbenzoate substrates were examined,affording the corresponding axially chiral diphenols with satis factory to excellent diastereomeric ratios,and a representative scalable preparation was also attempted.A formal synthesis of natural product(+)-deoxyschizandrin has been achieved in this work using one axially chiral diphenol as the synthetic intermediate. | Yuefei Gu Tianyang Wang Ming Gao Zhu-Jun Yao | 2021 | Chinese Chemical Letters2021，32，1： | 0 |
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