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| 1 | Support Vector Regression for Bus Travel Time Prediction Using Wavelet Transform显示文摘In order to accurately predict bus travel time, a hybrid model based on combining wavelet transform technique with support vector regression(WT-SVR) model is employed. In this model, wavelet decomposition is used to extract important information of data at different levels and enhances the forecasting ability of the model. After wavelet transform different components are forecasted by their corresponding SVR predictors. The final prediction result is obtained by the summation of the predicted results for each component. The proposed hybrid model is examined by the data of bus route No.550 in Nanjing, China. The performance of WT-SVR model is evaluated by mean absolute error(MAE), mean absolute percent error(MAPE) and relative mean square error(RMSE), and also compared to regular SVR and ANN models. The results show that the prediction method based on wavelet transform and SVR has better tracking ability and dynamic behavior than regular SVR and ANN models. The forecasting performance is remarkably improved to obtain within 6% MAPE for testing section Ⅰ and 8% MAPE for testing section Ⅱ, which proves that the suggested approach is feasible and applicable in bus travel time prediction. | Yang Liu Yanjie Ji Keyu Chen Xinyi Qi | 2019 | Journal of Harbin Institute of Technology(New Series)2019，26，3： | 2 |
| 2 | Vibrationbased Operational Modal Analysis of Rotor Systems显示文摘 | Qi Keyu He Zhengjia Li Zhen | 2008 | Measurement2008，41，7： | 1 |
| 3 | Vibration based op- erational modal analysis of rotor systems 显示文摘 | QI Keyu HE Zhengjia LI Zhen | 2008 | Measurement2008，41，7： | 1 |
| 4 | Chemically stable polypyrrole-modified liquid metal nanoparticles with the promising photothermal conversion capability显示文摘The gallium-based eutectic alloy has gained particular attention in various fields due to its natural features of metallic fluids at room temperature.However,these alloy nanoparticles are extremely susceptible to be oxidized accompanied by de-alloying during the preparation,storage,and application.Here,with the assistance of the macromolecular stabilizer and dopant,sodium dodecylbenzene sulfonate(SDBS),we demonstrate a stable polypyrrole(PPy)layer acts as a protected“armor”on the surface of liquid metal(i.e.,gallium-tin,EGaSn).SDBS enables the EGa Sn to keep well dispersion and protects dispersed EGaSn from being durative oxidized before PPy coating.Furthermore,PPy greatly inhibits the oxidation of EGaSn owing to the strong interface interaction between the lone pair electrons around the N atoms of Py rings and the Ga3+orbit of EGaSn.Consequently,the fabricated EGaSn nanoparticles possess the features of smaller particle size,superior uniform distribution,and stronger antioxidant capacity.The prepared EGaSn@PPy composite exhibits superior stability even after storing in an aqueous solution for up to 100 days.As a proof-of-concept application,the EGaSn@PPy composite displays remarkable photothermal performance with an enhanced photothermal conversion efficiency.This work provides a novel surface engineering strategy to ameliorate liquid metal for photothermal therapy applications. | Yaqin Qi Ting Jin Kai Yuan Jingyuan You Chao Shen Keyu Xie | 2022 | Journal of Materials Science & Technology2022，，32： | 1 |
| 5 | Cosine window-based boundary processing methord for emd and its ap-plication in rubbing fault diagnosis 显示文摘 | Qi Keyu He Zhengjia Zi Yanyang | 2007 | MechanicalSystems and Signal Processing2007，21，7： | 1 |
| 6 | Three-dimensional characterization of micro-fractures in shale reservoir rocks显示文摘Fractures are crucial for unconventional hydrocarbon exploitation,but it is difficult to accurately observe the 3D spatial distribution characteristics of fractures.Microtomography(micro-CT)technology makes it possible to observe the 3D structures of fractures at micro-scale.In this study,micron-CT scanning is conducted on multiple mud-shale samples of source rocks in the Permian Lucaogou Formation,Junggar Basin.The Avizo^(®) software is applied to process and segment the micron-CT images,so as to obtain the 3D fracture structure model inside rock core.Therefore,the independently-developed CTSTA program is adopted to quantitatively describe the micro-fractures inside rock core,including fracture dimension,extension direction and extension scale.Meanwhile,this study summarizes the classification characteristics of fractures and their anisotropy.On this basis,the fractal dimensions of fractures can also be extracted.Previous studies show that the geometric features of fractures have self-similarity at large and small scales,which can be described by exponential laws;and the fractal dimension is a typical exponent.Through the quantitative description or characterization of 3D fractures at micro-scale,the distribution characteristics of fractures in large scales could be known. | Chao Qi Xiaoqi Wang Wei Wang Jie Liu Jincai Tuo Keyu Liu | 2018 | Petroleum Research2018，3，3： | 1 |
| 7 | A multifunctional electrolyte with highly-coordinated solvation structure-in-nonsolvent for rechargeable lithium batteries显示文摘Rechargeable lithium-based battery is hailed as next-generation high-energy-density battery systems.However, growth of lithium dendrites, shuttle effect of lithium polysulfides intermediates and unstable interphase of high-voltage intercalation-type cathodes largely prevent their practical deployment.Herein, to fully conquer the three challenges via one strategy, a novel electrolyte with highlycoordinated solvation structure-in-nonsolvent is designed. On account of the particular electrolyte structure, the shuttle effect is completely suppressed by quasi-solid conversion of S species in Li-S batteries,with a stable cycle performance even at lean electrolyte(5μL mg^(-1)). Simultaneously, in-situ-formed highly-fluorinated interphases can not only lower Li+diffusion barrier to ensure uniform nucleation of Li but also improve stability of NCM cathodes, which enable excellent capacity retention of Lik LiNi(0.5)Co(0.2)Mn(0.3)O2 batteries under conditions toward practical applications(high loading of 2.7 m Ah cm^(-2) and lean electrolyte of 5 m L Ah^(-1)). Besides, the electrolyte is also nonflammable. This electrolyte structure offers useful guidelines for the design of novel organic electrolytes for practical lithium-based batteries. | Hui Zhao Jjinlei Gu Yuliang Gao Qian Hou Zengying Ren Yaqin Qi Kun Zhang Chao Shen Jun Zhang Keyu Xie | 2020 | Journal of Energy Chemistry2020，29，12： | 1 |
| 8 | Cosine window-based boundary processing method for EMD and its application in rubbing fault diagnosis 显示文摘 | Qi Keyu He Zhengjia Zi Yanyang | 2007 | Mechanical Systems and Signal Processing2007，21，7： | 1 |
| 9 | Cosine window2 based boundary processing method for EMD and its application in rubbing fault diagnosis显示文摘 | Qi Keyu He Zhengjia Zi Yanyang | 2007 | Mechanical Systems and Signal Processing2007，21，7： | 1 |
| 10 | Cosine window- based boundary processing method for EMD and its application in rubbing fault diagnosis 显示文摘 | Qi Keyu He Zhengjia Zi Yanyang | 2007 | Mechanical Systems and Signal Processing2007，21，7： | 1 |
| 11 | Uniform-dispersed ZnS quantum dots loading on graphene as a promising anode for potassium-ion batteries显示文摘The potassium-ion batteries(PIBs)have become the promising energy storage devices due to their relatively moderate cost and plenteous potassium resources.Whereas,the main drawback of PIBs is unsatisfacto ry electrochemical perfo rmance induced by the larger ionic radius of potassium ion.Herein,we report a well-designed,uniform-dispersed,and morphology-controllable zinc sulfide(ZnS)quantum dots loading on graphene as an anode in the PIBs.The directed uniform dispersion of the in-situ growing ZnS quantum dots(~2.8 nm in size)on graphene can mitigate the volume effect during the insertionextraction process and shorten the migration path of potassium ions.As a result,the battery exhibits superior cycling stability(350.4 mAh/g over 200 cycles at 0.1 A/g)and rate performance(98.8 mAh/g at2.0 A/g).We believe the design of active material with quantum dot-minimized size provides a novel route into PIBs and contributes to eliminating the major electrode failure issues of the system. | Yaqin Qi Yong Yang Qian Hou Kun Zhang Hui Zhao Haijun Su Lijiao Zhou Xingrui Liu Chao Shen Keyu Xie | 2021 | Chinese Chemical Letters2021，32，3： | 1 |
| 12 | Visualization of enantioselective recognition and separation of chiral acids by aggregation-induced emission chiral diamine显示文摘Enantioselective recognition and separation are the most important issues in the fields of chemistry,pharmacy,agrochemical,and food science.Here,we developed two optically active diamines showing aggregation-induced emission(AIE)that can discriminate 5 kinds of chiral acids with high enantioselectivity.Especially,a very high fluorescence intensity ratio(IL/ID)of 281 for(±)-Dibenzoyl-D/L-tartaric acid was obtained through the collection of fluorescence change after interaction with chiral AIE-active diamine.By virtue of AIE property and intermolecular acidbase interaction,enantioselective separation was facilely realized by simple filtration of the precipitates formed by chiral AIE luminogen(AIEgen)and one enantiomer in the racemic solution.The chiral HPLC data indicated that the precipitates of AIEgen/chiral acid possessed 82%L-analyte(the enantiomeric excess value was assessed to be 64%ee).Therefore,this method can serve as a simple,convenient,and low-cost tool for chiral detection and separation. | Chunxuan Qi Keyue Wei Qingyang Li Yuemei Li Xiaolong Su Jun-Cheng Yang Jingjing Tian Pu Chen Hai-Tao Feng Ben Zhong Tang | 2023 | Aggregate2023，4，3： | 0 |
| 13 | Unveiling mitophagy-mediated molecular heterogeneity and development of a risk signature model for colorectal cancer by integrated scRNA-seq and bulk RNA-seq analysis显示文摘Background:Accumulating researchers have recognized mitophagy as a key player in tumors,but few studies have investigated its role in the tumor microenvironment(TME).Advances in the technology of single-cell RNA sequencing(scRNA-seq)have allowed unveiling the concealed features of the TME at cellular resolution.This study aimed to elucidate the role of mitophagy within the TME of colorectal cancer(CRC)and to establish a mitophagy-mediated risk model.Methods:We assessed mitophagy-related pathway activities at both single-cell and tissue levels.Subsequently,an unsupervised clustering algorithm was employed to identify mitophagy-mediated subtypes.Furthermore,we developed a mitophagy-mediated risk signature(MMRS)using least absolute shrinkage and selection operator(LASSO)Cox analysis and constructed a MMRS model incorporating the risk score and clinical variables.Subsequently,we used quantitative reverse transcription polymerase chain reaction analysis to verify the expression of the screened genes.Results:We retrieved and annotated a total of 14,719 cells from eight samples in the scRNA-seq GSE132465 data set.The activities of mitophagy-related pathways were uniformly upregulated in cancer cells.Integrating with bulk RNA-seq data,we identified two mitophagy-mediated clusters(C1 and C2)with distinct characteristics and prognoses.C2 was identified as a mitophagy-high cluster.Then,we developed a five-gene MMRS via LASSO Cox analysis in The Cancer Genome Atlas(TCGA)cohort.We utilized the GSE39582 cohort to validate the efficacy of our model.The expression of CX3CL1 and INHBB was upregulated in CRC tissues.Conclusions:The present study identified two mitophagy-mediated CRC subtypes with distinct features.Our MMRS may provide potential therapeutic strategies for CRC.The findings of our work offer novel insights into the involvement of mitophagy in CRC. | Han Gao Qi Zou Linyun Ma Keyu Cai Yi Sun Li Lu Donglin Ren Bang Hu | 2023 | Gastroenterology Report2023，11，1： | 0 |
| 14 | External rectal prolapse:abdominal or perineal repair for men?A retrospective cohort study显示文摘Background:External rectal prolapse is a relatively rare disease,in which male patients account for a minority.The selection of abdominal repair or perineal repair for male patients has rarely been investigated.Methods:Fifty-one male patients receiving abdominal repair(laparoscopic ventral rectopexy)or perineal repair(Delorme or Altemeier procedures)at the Sixth Affiliated Hospital of Sun Yat-sen University(Guangzhou,China)between March 2013 and September 2019 were retrospectively analysed.We compared the recurrence,complication rate,post-operative defecation disorder,length of stay,and quality of life between the abdominal and perineal groups.Results:Of the 51 patients,45 had a complete follow-up,with a median of 48.5 months(range,22.8–101.8 months).A total of 35 patients were under age 40 years.The complication rate associated with abdominal repair was less than that associated with perineal repair(0%vs 20.7%,P=0.031)and the recurrence rate was also lower(9.5%vs 41.7%,P=0.018).Multivariate analysis showed that perineal repair(odds ratio,9.827;95%confidence interval,1.296–74.50;P=0.027)might be a risk factor for recurrence.Moreover,only perineal repair significantly improved post-operative constipation status(preoperative vs post-operative,72.4%vs 25.0%,P=0.001).There was no reported mortality in either of the groups.No patient’s sexual function was affected by the surgery.Conclusions:Both surgical approaches were safe in men.Compared with perineal repair,the complication rate and recurrence rate for abdominal repair were lower.However,perineal repair was better able to correct constipation. | Bang Hu Qi Zou Zhenyu Xian Dan Su Chao Liu Li Lu Minyi Luo Zixu Chen Keyu Cai Han Gao Hui Peng Wuteng Cao Donglin Ren | 2022 | Gastroenterology Report2022，10，1： | 0 |
| 15 | A self-healing liquid metal anode for lithium-ion batteries显示文摘The gallium-based liquid metal as one of the self-healing materials has gained wide attention, especially in the energy storage system. However, volume expansion with the ‘‘liquid-solid-liquid”transformation process still leads to un-controlled electrode failure, which stimulates the irreversibility of liquid metal and hinders their self-healing effect as the anode for lithium-ion batteries. Herein, the polypyrrole(PPy) with highly conductive and adhesive features is first introduced to fasten the liquid metal nanoparticles(gallium-tin alloy, EGaSn) in the integrated electrode and applied as the anode for lithium-ion batteries. A tightly PPy wrapped EGaSn nanoparticles structure is formed during the in-situ polymerization synthesis process, which effectively avoids the detachment of solid alloyed products. Based on the features of PPy, polyacrylic acid is added to facilitate strengthening the integrity of the electrode by constructing the hydrogen bond. The ‘‘dual-insurance” design endows the EGaSn to exhibit superior electrochemical kinetics and an astonishing self-healing effect. As a result, the customized anode displays superior cycling stability(499.8 mAh g^(-1) after 500 cycles at 1.0 A g^(-1))and rate capability(350 mAh g^(-1) at 2.0 A g^(-1)).This work enriches the electrode engineering technology of liquid metal nanoparticles and opens up a new way to customize the self-healing anode for lithium-ion batteries. | Yaqin Qi Chao Shen Qian Hou Zengying Ren Ting Jin Keyu Xie | 2022 | Journal of Energy Chemistry2022，31，9： | 0 |
| 16 | Feature extraction of gear-localized defect using adaptive lifting scheme and local gradient maps显示文摘In this paper,the adaptive lifting scheme (ALS) and local gradient maps (LGM) are proposed to isolate the transient feature components from the gearbox vibration signals. Based on entropy minimization rule,the ALS is employed to change properties of an initial wavelet and design adaptive wavelet. Then LGM is applied to characterize the transient feature components in detail signal of decomposition results using ALS. In the present studies, the orthogonal Daubechies 4 (Db 4) wavelet is used as the initial wavelet. The proposed method is applied to both simulated signals and vibration signals acquired from a gearbox for periodic impulses detection. The two conventional methods (cepstrum analysis and Hilbert envelope analysis) and the orthogonal Db4 wavelet are also used to analyze the same signals for comparison. The results demonstrate that the proposed method is more effective in extracting transient components from noisy signals. | Zhang Lu Zhao Hong Li Zhen Qi Keyu Li Zongyao Yao Nianling | 2013 | Engineering Sciences2013，11，1： | 0 |
| 17 | Platycodin D inhibits angiogenic vascular mimicry in NSCLC by regulating the eIF4E-mediated RNA methylome显示文摘The treatment of non-small cell lung cancer(NSCLC)remains a challenge due to tumor evolution during anti-angiogenesis therapies,in which the mechanism of vascular mimicry(VM)is believed to result in ineffective treatment[1].To conquer this challenge,substantial effort has recently been devoted to seeking out natural compounds on account of their multitarget actions.As a traditional herbal medicine,platycodin D(PD)is the major bioactive monomer derived from Platycodon grandiflorum(P.grandiflorum)and is used as an expectorant for pulmonary disease in Asia[2]. | Shuyu Zheng Yanlin Xin Jiamin Lin Zejuan Xie Keyu Cheng Shanshan Wang Wenli Lu Hao Yang Tianming Lu Jun Li Ruogu Qi Yuanyuan Guo | 2024 | Journal of Pharmaceutical Analysis2024，14，1： | 0 |
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