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Mo-doped one-dimensional needle-like Ni_(3)S_(2) as bifunctional electrocatalyst for efficient alkaline hydrogen evolution and overall-water-splitting

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ChemPhysMater 2024年第1期3卷 74-82页

作者： Junjie Huang Yupeng Xing Jinzhao Huang Fei Li Gang Zhao Xingmin Yu Binxun Li Xinran Zhang school of Physics and technology University of JinanJinan 250022China

Hydrogen energy plays an important role in clean energy system and is considered the core energy source for future technological development owing to its lightweight nature,high calorific value,and clean combustion *** electrocatalytic conversion of water into hydrogen is considered a highly promising *** electrocatalyst is indispensable in the electrocatalytic process,and finding an efficient electrocatalyst is ***,the current commercial electrocatalysts(such as Pt/C and Ru)are expensive;therefore,there is a need to find an inexpensive and efficient electrocatalyst with high stability,corrosion resistance,and high electrocatalytic *** this study,we developed a cost-effective bifunctional electrocatalyst by incorporating molybdenum into nickel sulfide(Ni_(3)S_(2))and subsequently tailoring its structure to achieve a one-dimensional(1D)needle-like *** hydrogen production efficiency of nickel sulfide was improved by changing the ratio of Mo *** analyzing the electrochemical performance of different Mo-doped catalysts,we found that the Ni_(3)S_(2)-Mo-0.1 electrocatalyst exhibited the best electrocatalytic effect in 1 M KOH;at a current density of 10 mA cm^(-2),it exhibited overpotentials of 120 and 279 mV for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER),respectively;at a higher current density of 100 mA cm^(-2),the HER and OER overpotentials were 396 and 495 mV,***,this electrocatalyst can be used in a two-electrode water-splitting ***,we thoroughly investigated the mechanism of the overall water splitting of this electrocatalyst,providing valuable insights for future hydrogen production via overall-water-splitting.

关键词： Hydrogen evolution reaction Molybdenum doped Nickel sulfide Overall water splitting Needle-like multistage structure

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Future changes in compound drought events and associated population and GDP exposure in China based on CMIP6

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Atmospheric and Oceanic science Letters 2024年第3期17卷 25-31页

作者： Rufan Xue Bo Sun Wanling Li Huixin Li Botao Zhou Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disasters Ministry of Education/Joint International Research Laboratory of Climate and Environment ChangeNanjing University of Information Science and TechnologyNanjingChina Southern marine science and Engineering Guangdong Laboratory ZhuhaiChina Nansen Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina

相较于一种类型的干旱,几种类型的干旱同时发生的复合型干旱事件对人类社会造成的危害更加严重.本研究采用CMIP6资料,研究中国复合型干旱事件及其相关社会经济暴露度的未来变化.结果表明,西北北部,西南和华南地区复合型干旱事件频次,持... 详细信息

相较于一种类型的干旱,几种类型的干旱同时发生的复合型干旱事件对人类社会造成的危害更加严重.本研究采用CMIP6资料,研究中国复合型干旱事件及其相关社会经济暴露度的未来变化.结果表明,西北北部,西南和华南地区复合型干旱事件频次,持续时间和严重程度增加,而华北和东北地区则减少.复合型干旱事件的人口暴露度在长江流域南部大幅增加,在长江流域以北的东部大幅减少,其中气候和人口均对人口暴露度的变化有重要影响.由于GDP的快速增长,中国未来几乎所有地区复合型干旱事件的GDP暴露度增加,特别是在中国东部,GDP效应对GDP暴露度变化的相对贡献最大.

关键词：复合型干旱事件国际耦合模式比较计划人口暴露度 GDP暴露度相对贡献

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A Novel Supercapacitor Degradation Prediction Using a 1D Convolutional Neural Network and Improved Informer Model

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Protection and Control of Modern Power Systems 2024年第4期9卷 51-68页

作者： Hao Zhang Zhenxiao Yi Le Kang Yi Zhang Kai Wang the College of Materials science and Engineering Xi’an University of Science and Technol-ogyXi’an 710054China the school of Electrical Engineering Qingdao UniversityQingdao 266071China the school of Energy sciences and Engineering Nanjing Tech UniversityNanjing 211816China

Safety and reliability are crucial for the next-generation supercapacitors used in energy storage systems,while accurate prediction of the degradation trajectory and remaining useful life(RUL)is essential for analyzing degradation and evaluating performance in energy storage *** study proposes a novel data processing and improved one-dimensional convolutional neural network(1D CNN)-informer framework for robust RUL *** data preprocessing,all data from two structures are adjusted to a unified format,and cross-entropy loss is used to couple the 1D CNN and ***,the minimum-maximum feature scaling method is used for normalization to accelerate the training process in reaching the minimum cost function.A relative position encoding algorithm is introduced to improve the Informer model,enabling it to better learn the sequence relationships between data and effectively reduce prediction *** data in dif-ferent working conditions are used to validate the proposed *** with other existing methods,the maximum root mean square error is reduced by 32.71%,the mean absolute error is reduced by 28.50%,and R^(2) is increased by 4.79%.The strategy considers the complementarity between two single models,which can extract features and enrich local details,as well as enhance the model’s global perception *** experimental results demonstrate that the proposed model achieves high-precision and robust RUL prediction,thereby pro-moting the industrial application of supercapacitors.

关键词： Supercapacitors remaining useful life convolution neural network transformer informer

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Multichannel microneedle dry electrode patches for minimally invasive transdermal recording of electrophysiological signals

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Microsystems & Nanoengineering 2024年第3期10卷 119-136页

作者： Zhengjie Liu Xingyuan Xu Shuang Huang Xinshuo Huang Zhibo Liu Chuanjie Yao Mengyi He Jiayi Chen Hui-jiuan Chen Jing Liu Xi Xie State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologyGuangdong Province Key Laboratory of Display Material and TechnologySun Yat-Sen UniversityGuangzhouChina school of Biomedical Engineering Sun Yat-Sen UniversityGuangzhouChina The First Affiliated Hospital of Sun Yat-Sen University GuangzhouChina

The collection of multiple-channel electrophysiological signals enables a comprehensive understanding of the spatial distribution and temporal features of electrophysiological *** approach can help to distinguish the traits and patterns of different ailments to enhance diagnostic *** array electrodes,which can penetrate skin without pain,can lessen the impedance between the electrodes and skin;however,current microneedle methods are limited to single channels and cannot achieve multichannel collection in small ***,a multichannel(32 channels)microneedle dry electrode patch device was developed via a dimensionality reduction fabrication and integration approach and supported by a self-developed circuit system to record weak electrophysiological signals,including electroencephalography(EEG),electrocardiogram(ECG),and electromyography(EMG)*** microneedles reduced the electrode–skin contact impedance by penetrating the nonconducting stratum corneum in a painless *** multichannel microneedle array(MMA)enabled painless transdermal recording of multichannel electrophysiological signals from the subcutaneous space,with high temporal and spatial resolution,reaching the level of a single microneedle in terms of signal *** MMA demonstrated the detection of the spatial distribution of ECG,EMG and EEG signals in live rabbit models,and the microneedle electrode(MNE)achieved better signal quality in the transcutaneous detection of EEG signals than did the conventional flat dry electrode *** work offers a promising opportunity to develop advanced tools for neural interface technology and electrophysiological recording.

关键词： needle rabbit electrode

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Comprehensive summary of material basis-Laying a foundation for substances of medicine food homology development

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Chinese Herbal Medicines 2024年第3期16卷 311-312页

作者： Wenyuan Gao school of Pharmaceutical science and technology Tianjin UniversityTianjin 300072China

Traditional Chinese medicine(TCM)has experienced the stages of ancient medicine,internal or external treatment and prescription medicine during thousands of years.“Excellent doctor preventive treatment of disease,or ... 详细信息

关键词： has doctor prescription

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Design and experiment analysis of the small maize harvester with attitude adjustment in the hilly and mountainous areas of China

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 118-127页

作者： Meizhou Chen Guangfei Xu Yuanzhen Wei Yinping Zhang Peisong Diao Huanxiao Pang College of Agricultural Engineering and Food science Shandong University of TechnologyZibo255000ShandongChina school of Mechanical and Automotive Engineering Liaocheng UniversityLiaocheng252000ShandongChina Shandong Academy of Agricultural Machinery sciences Jinan 250000China

To solve the problem of small planting plots and large sloping land for mechanized maize harvesting in China hilly and mountainous areas,a small maize harvester with attitude adjustment was designed to realize maize snapping,peeling,straw crushing and attitude adjusting at on time in this *** basic structure and working principle of the small maize harvester were described,and the key components were designed as *** maize snapping device adopted the combination form of maize snapping plates and straw pulling rollers,and the gap of the straw pulling rollers can be adjusted to adapt to different maize *** pairs of peeling rollers formed a groove arrangement to improve peeling rate and reduced ear grain *** pressure feeding device mainly comprised drive chain and three grade pressure feeding rollers to increase the friction between ears and the peeling rollers,and help ears *** attitude adjustment advice was designed according to the high point stationary pursuit leveling *** the attitude angle of the rack approached 0,the small maize harvester reached the level *** actual range of attitude adjustment was obtained and the accuracy of static attitude adjustment was verified through attitude adjustment *** influencing factors of ear loss rate and bract peeling rate were determined by orthogonal test,including the rotational speed of straw pulling rollers,peeling rollers and pressure feeding *** mathematical regression model between the experimental factors and indicators was established by using Design Expert,and through the analysis variance to verify the significance of the evaluation indicators,the best combination of operation parameters was determined that the rotational speed of straw pulling rollers,peeling rollers and pressure feeding rollers were 1440 r/min,1535 r/min and 406 r/*** the optimal combination of the operation parameters,the ear loss rate and bract peeling rate were 1.33%and 93.98%.T

关键词： maize harvester hilly and mountains areas attitude adjustment anti rollover structure

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Design of tightly linked dual ring antenna and imaging of magnetic field distribution using a diamond fiber probe

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Chinese Physics B 2024年第2期33卷 347-352页

作者：叶青云薛雅文何飞越赵旭彤卞雨辰卢文韬王金旭陈鸿浩夏圣开曾明菁杜关祥 College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China College of science Nanjing University of Posts and TelecommunicationsNanjing 210003China school of Computer science Nanjing University of Posts and TelecommunicationsNanjing 210023China Bell Honors school Nanjing University of Posts and TelecommunicationsNanjing 210023China

A tightly linked dual ring antenna is designed,and it is specifically tailored for uniformly coupling the microwave magnetic field to the nitrogen-vacancy(NV)*** designed antenna operates at a center frequency of about 2.87 GHz,with a bandwidth of around 200 MHz,allowing it to address multiple resonance peaks in the optically detected magnetic resonance(ODMR)spectrum in an external magnetic ***,the antenna generates a fairly uniform magnetic field in a range with a radius of 0.75 *** resolution imaging of the magnetic field distribution on the surface of the antenna is conducted by using a fiber diamond *** also investigate the effect of magnetic field uniformity on the linewidth of ODMR,so as to provide insights into reducing the inhomogeneous broadening of ODMR.

关键词： nitrogen vacancy(NV) microwave(MW)imaging inhomogeneous broadening

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A triboelectric nanogenerator based on a spiral rotating shaft for efficient marine energy harvesting of the hydrostatic pressure differential

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Materials Reports(Energy) 2024年第3期4卷 69-76页

作者： Xuemei Song Yuan Chao Pan Chang Bao Han Chang Xin Liu Yaxiaer Yalikun Hui Yan Yang Yang Key Laboratory of Advanced Functional Materials(Beijing University of technology) Ministry of EducationBeijing Key Lab of Microstructure and Property of Advanced MaterialsBeijing University of TechnologyBeijing100124PR China Institute of Deep-Sea science and Engineering Chinese Academy of SciencesSanya572000PR China Division of Materials science Nara Institute of Science and Technology8916-5 Takayama-choIkomaNara630-0192Japan

Equipment used in underwater sensing and exploration typically relies on cables or batteries for energy supply,resulting in a limited and inconvenient energy supply and marine environmental pollution that hinder the sustainable development of distributed ocean sensing ***,we design a deep-sea differential-pressure triboelectric nanogenerator(DP-TENG)based on a spiral shaft drive using modified polymer materials to harness the hydrostatic pressure gradient energy at varying ocean depths to power underwater *** spiral shaft structure converts a single compression into multiple rotations of the TENG rotor,achieving efficient conversion of differential pressure *** multi-pair electrode design enables the DP-TENG to generate a peak current of 61.7μA,the instantaneous current density can reach 0.69μA cm^(-2),and the output performance can be improved by optimizing the spiral angle of the *** DP-TENG can charge a 33μF capacitor to 17.5 V within five working *** can also power a digital calculator and light up 116 commercial power light-emitting diodes,demonstrating excellent output *** its simple structure,low production cost,and small form factor,the DP-TENG can be seamlessly integrated with underwater *** results hold broad prospects for underwater blue energy harvesting and are expected to contribute to the development of self-powered equipment toward emerging“smart ocean”and blue economy applications.

关键词： Triboelectric nanogenerators Blue energy Energy harvesting Differential pressure energy Self-power sensor

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Some Remarks on Cocks'Identity-Based Encryption Scheme

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Journal of Donghua University(English Edition) 2024年第4期41卷 447-450页

作者： ZHAO Xiaopeng school of Computer science and technology Donghua UniversityShanghai 201620China

The theory of quadratic residues plays an important role in *** 2001,Cocks developed an identity-based encryption(IBE)scheme based on quadratic residues,resolving Shamir’s 17-year-old open ***,a notable drawback of Cocks’scheme is the significant expansion of the ciphertext,and some of its limitations have been addressed in subsequent ***,Cotan and Teşeleanu highlighted that previous studies on Cocks’scheme relied on a trial-and-error method based on Jacobi symbols to generate the necessary parameters for the encryption *** enhanced the encryption speed of Cocks’scheme by eliminating this trialand-error *** on security analysis,this study concludes that the security of Cotan-Teşeleanu’s proposal cannot be directly derived from the security of the original Cocks’***,by adopting the Cotan-Teşeleanu method and introducing an additional variable as a public element,this study develops a similar enhancement scheme that not only accelerates the encryption speed but also provides security equivalent to the original Cocks’scheme.

关键词： identity-based encryption(IBE) quadratic residue security Cocks’IBE scheme

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Application status and prospect of ionic liquids in oilfield chemistry

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Petroleum 2024年第1期10卷 11-18页

作者： Jinsheng Sun Zhuoyang Xiu Li Li Kaihe Lv Xianfa Zhang Zonglun Wang Zhiwen Dai Zhe Xu Ning Huang Jingping Liu school of Petroleum Engineering China University of Petroleum (East China) CNPC Engineering technology R&D Company Limited Oil & Gas technology Research Institute of Changqing Oilfield Company

The ionic liquid, as a new treatment agent, has been increasingly applied in oil fields due to its strong temperature resistance, good solubility and high surface activity. In this paper, we systematically discuss the action mechanism and application effect of ionic liquids in oilfield chemistry. Ionic liquids can inhibit shale hydration expansion and reduce fluid loss through adsorption and intercalation, inhibit the formation of natural gas hydrate through imidazole five-membered ring structure as a space barrier, reduce viscosity of heavy oil by breaking chemical bonds of heavy oil macromolecules and charge transfer,improve oil displacement efficiency by forming ions pairs with carboxyl groups in crude oil, demulsify by forming channels between dispersed water droplets, acidify the formation by reacting with water to produce acid, interacts with organic material through weak hydrogen bonds and extracts it from oilfield wastewater, desulphurize by inserting sulfide molecules into the “stack” structure and form liquid inclusion complex, inhibit corrosion by forming a protective film on the metal surface. Based on the above aspects, the development direction of ionic liquids is proposed. The application of ionic liquids in oilfield chemistry is still in its infancy. It is urgent to fully explore the application performance of ionic liquids in oilfield chemistry, which also provides theoretical and technical supports for efficient reservoir development.

关键词： Ionic liquids Oilfield chemistry Shale inhibitor Drilling fluid

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