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Self-assembled graphene oxide/polyethyleneimine films as high-performance quartz crystal microbalance humidity sensors

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Rare Metals 2021年第6期40卷 1597-1603页

作者： Zhen Yuan hui-Ling Tai Yuan-Jie Su Guang-Zhong Xie xiao-Song du Ya-Dong Jiang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

As humidity is one of the most widely demanded environmental parameters,the precision of its detection is *** advanced humidity sensor will improve the validity of the humidity monitoring *** this study,a facile chemical layer-by-layer self-assembly(CLS)method was developed for fabricating graphene oxide(GO)/polyethyleneimine(PEI)multilayer *** to the chemical bonding between the PEI and GO,and the intrinsic stickiness of the PEI,layered films with different numbers of layers were successfully prepared using the CLS method and confirmed through ultraviolet-visible(UV-Vis)spectroscopy and the mass loading of quartz crystal microbalance(QCM).Morphological measurements revealed that the roughness and thickness of the films increased exponentially with the number of *** GO/PEI films were deposited on QCM electrodes using the CLS method to produce the humidity *** humidity measurement results showed a high sensitivity(37.84 Hz/%RH)and rapid response/recovery(<5 s/8 s)of the optimal sensor,which was superior to that of recently developed QCM sensors.

关键词： Humidity sensors Quartz crystal microbalance Graphene oxide Polyethyleneimine Self-assembly

Solidification behaviour and hot cracking susceptibility of a novel Ni-based superalloy

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Journal of Iron and Steel Research International 2024年第4期31卷 956-966页

作者： Yue Chen Shao-min Lv Xing-fei Xie xiao-can Wen Jng-long Qu Jin-hui du High-Temperature Materials Institute China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China Beijing GAONA Materials and Technology Co. Ltd.Beijing 100081China Sichuan CISRI-GAONA Forging Co. Ltd.Deyang 610000SichuanChina

A novel Ni-based superalloy GH4151,with a γ′ volume fraction of about 55%and a service temperature capability up to 8oo oC,was *** to the different cooling conditions of various regions during the solidification of ingots,significant cooling rate variations may lead to the occurrence of hot *** scanning laser microscope was utilised to investigate the solidification process and phase precipitation behaviour of the GH4151 under wide range cooling *** characteristics of L→γ transformation were analysed,and the growth rates of at each stage were *** segregation behaviour was predicted using the Scheil equation,and the predicted results match well with the experimental *** sensitivity coefficient for hot cracking was modified,and cracking sensitivity coefficient values for the alloy under different cooling rates were computed,revealing that the alloy is most susceptible to hot cracking at 10℃/min cooling ***,controlling the cooling rate can reduce the possibility of hot cracking in ingot.

关键词： Ni-based superalloy Solidification behaviour In-situ observation Clyne and Davies's criterion:Hot cracking susceptibility

Captioning Videos Using Large-Scale Image Corpus

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Journal of Computer Science & Technology 2017年第3期32卷 480-493页

作者： xiao-Yu du Yang Yang Liu Yang Fu-Min Shen Zhi-Guang Qin Jin-hui Tang School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu 610054 China School of Software Engineering Chengdu University of Information Technology Chengdu 610225 China Center for Future Media University of Electronic Science and Technology of China Chengdu 611731 China School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China Sichuan University West China Hospital of Stomatology Chengdu 610041 China School of Computer Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China

Video captioning is the task of assigning complex high-level semantic descriptions （e.g., sentences or paragraphs） to video data. Different from previous video analysis techniques such as video annotation, video event detection and action recognition, video captioning is much closer to human cognition with smaller semantic gap. However, the scarcity of captioned video data severely limits the development of video captioning. In this paper, we propose a novel video captioning approach to describe videos by leveraging freely-available image corpus with abundant literal knowledge. There are two key aspects of our approach： 1） effective integration strategy bridging videos and images, and 2） high efficiency in handling ever-increasing training data. To achieve these goals, we adopt sophisticated visual hashing techniques to efficiently index and search large-scale images for relevant captions, which is of high extensibility to evolving data and the corresponding semantics. Extensive experimental results on various real-world visual datasets show the effectiveness of our approach with different hashing techniques, e.g., LSH （locality-sensitive hashing）, PCA-ITQ （principle component analysis iterative quantization） and supervised discrete hashing, as compared with the state-of-the-art methods. It is worth noting that the empirical computational cost of our approach is much lower than that of an existing method, i.e., it takes 1/256 of the memory requirement and 1/64 of the time cost of the method of Devlin et al.

关键词： video captioning hashing image captioning

Thermal error modeling based on BiLSTM deep learning for CNC machine tool

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Advances in Manufacturing 2021年第2期9卷 235-249页

作者： Pu-Ling Liu Zheng-Chun du hui-Min Li Ming Deng xiao-Bing Feng Jian-Guo Yang School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

The machining accuracy of computer numerical control machine tools has always been a focus of the manufacturing *** all errors,thermal error affects the machining accuracy *** of the significant impact of Industry 4.0 on machine tools,existing thermal error modeling methods have encountered unprecedented challenges in terms of model complexity and capability of dealing with a large number of time series data.A thermal error modeling method is proposed based on bidirectional long short-term memory(BiLSTM)deep learning,which has good learning ability and a strong capability to handle a large group of dynamic data.A four-layer model framework that includes BiLSTM,a feedforward neural network,and the max pooling is *** elaborately designed algorithm is proposed for better and faster model *** window length of the input sequence is selected based on the phase space reconstruction of the time *** model prediction accuracy and model robustness were verified experimentally by three validation tests in which thermal errors predicted by the proposed model were compensated for real workpiece *** average depth variation of the workpiece was reduced from approximately 50μm to less than 2μm after *** reduction in maximum depth variation was more than 85%.The proposed model was proved to be feasible and effective for improving machining accuracy significantly.

关键词： Thermal error Error modeling Bidirectional long short-term memory(BiLSTM) Phase space reconstruction Computer numerical control(CNC)machine tool

Risk factors for cognitive impairment in patients with chronic kidney disease

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World Journal of Psychiatry 2024年第2期14卷 308-314页

作者： xiao-hui Wang Yong He Huan Zhou Ting xiao Ran du Xin Zhang Department of Nephrology The Fifth Hospital of WuhanWuhan 430050Hubei ProvinceChina Department of Nephrology The Central Hospital of Enshi Tujia and Miao Autonomous PrefectureEnshi 445000Hubei ProvinceChina

BACKGROUND Chronic kidney disease(CKD)patients have been found to be at risk of concurrent cognitive dysfunction in previous studies,which has now become an important public health issue of widespread *** To investigate the risk factors for concurrent cognitive dysfunction in patients with *** This is a prospective cohort study conducted among patients with CKD between October 2021 and March 2023.A questionnaire was formulated by literature review and expert consultation and included questions about age,sex,education level,per capita monthly household income,marital status,living condition,payment method,and *** Logistic regression analysis showed that patients aged 60-79 years[odds ratio(OR)=1.561,P=0.015]and≥80 years(OR=1.760,P=0.013),participants with middle to high school education(OR=0.820,P=0.027),divorced or widowed individuals(OR=1.37,P=0.032),self-funded patients(OR=2.368,P=0.008),and patients with hypertension(OR=2.011,P=0.041)had a higher risk of cognitive *** risk of cognitive impairment was lower for those with a college degree(OR=0.435,P=0.034)and married *** The risk factors affecting cognitive dysfunction are age,60-79 years and≥80 years;education,primary school education or less;marital status,divorced or widowed;payment method,selffunded;hypertension;and CKD.

关键词： Cognitive impairment Cognitive dysfunction Chronic kidney disease

Existence Results for Superlinear Elliptic Equations with Nonlinear Boundary Value Conditions

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Acta Mathematica Sinica,English Series 2019年第10期35卷 1655-1680页

作者： xiao hui YU College of Mathematics and Statistics Shenzhen University

In this paper, we study the existence of solutions for the following superlinear elliptic equation with nonlinear boundary value condition{-△u+u=|u|^r-2u in Ω,■u/■v=|u|^q-2u on ■Ω, where Ω■R^N, N≥3 is a bounded domain with smooth boundary. We will prove the existence results for the above equation under four different cases:(i) Both q and r are subcritical;(ii) r is critical and q is subcritical;(iii) r is subcritical and q is critical;(iv) Both q and r are critical.

关键词： Existence result critical exponent trace inequality nonlinear boundary value (PS) condition

A new loach species of Troglonectes(Teleostei:Nemacheilidae)from Guangxi,China

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Zoological Research 2021年第4期42卷 423-427页

作者： Li-xiao Zhao Jia-hui Liu Li-Na du Fu-Guang Luo Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Guangxi Normal University) Ministry of EducationGuilinGuangxi 541004China Guangxi Key Laboratory of Rare and Endangered Animal Ecology College of Life ScienceGuangxi Normal UniversityGuilinGuangxi 541004China Liuzhou Aquaculture Technology Extending Station LiuzhouGuangxi 545006China

A new species of the genus Troglonectes is described from Guangxi Zhuang Autonomous Region,*** hechiensis *** be easily distinguished from its congeners based on the following characters:eyes normal;whole body covered by scales except head,throat,and abdomen;lateral line incomplete;caudal fin concave;and color pattern present on body.

关键词： sp.nov. China. incomplete

Rodent biology and management: Current status, opinion and challenges in China

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Journal of Integrative Agriculture 2019年第4期18卷 830-839页

作者： LIU xiao-hui State Key Laboratory for Biology of Plant Diseases and Insect Pests Key Laboratory of Weed and Rodent Biology and Management Institute of Plant Protection Chinese Academy of Agricultural Sciences

China experiences serious agricultural damages from rodents, and, correspondingly, researchers in China are actively studying rodent biology and management. Following the popularization of ecologically-based rodent pest management and extension of the basic state policy of Ecological Civilization Construction in China, recent efforts in rodent control technologies are mainly focused on eliminating side effects of rodenticides and developing environmentally friendly techniques. Considering ecological functions of rodents to test their interaction with the environment is a promising design for understanding rodent populations in local ecosystems and for developing ecologically-based rodent management. Using ecological phenotypes and applying advanced techniques of molecular biology, genetics, and epigenetics might be useful for illustrating the deep regulatory mechanisms of fluctuations in rodent populations. However, facing the dual characteristics of rodents as pests and their roles as keystone species in many ecosystems, it is still a challenge to establish reasonable local thresholds to balance rodent management with the negative effects of rodent control on the environment in the future.

关键词： rodent rodent management rodent biology

X-ray plateaus followed by sharp drops in GRBs 060413, 060522, 060607A and 080330: Further evidences for central engine afterglow from gamma-ray bursts

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Chinese Journal of Astronomy and Astrophysics 2009年第2期9卷 213-219页

作者： xiao-hui Zhang Department of Physics Yunnan University Kunming 650091 China

The X-ray afterglows of GRBs 060413, 060522, 060607A and 080330 are characterized by a plateau followed by a very sharp drop. The plateau could be explained within the framework of the external forward shock model but the sharp drop can not. We interpret the plateau as the afterglows of magnetized central engines, plausibly magnetars. In this model, the X-ray afterglows are powered by the internal magnetic energy dissipation and the sudden drop is caused by the collapse of the magnetar. Accordingly, the X-ray plateau photons should have a high linear polarization, which can be tested by future X-ray polarimetry.

关键词： gamma-rays bursts -- ISM jets and outflows -- radiation mechanisms non-thermal