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Study of pre-processing model of coal-mine hoist wire-rope fatigue damage signal

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International Journal of Mining Science and Technology 2015年第6期25卷 1017-1021页

作者： Tian Jie Wang Hongyao zhou junying Meng Guoying School of Mechanical Electronic and Information Engineering China University of Mining and Technology

In this paper, we propose a pre-processing method for the detection of wire-rope signals. This is necessary because of the lack of processing methods that are currently employed. First, we investigated the one-dimensional discrete morphological and wavelet transform. Then, we developed a pre-processing model that is based on the morphological wavelet-filtering algorithm. We then proposed a modified morphology filtering algorithm. We also designed an experiment platform for wire-rope *** levels of localized flaws(LFs) and damage were formed in the wire-rope specimen. We performed a series of experimental studies, and the results show that the proposed method can effectively filter the drift signal. The signal-to-noise ratio of the new filtering algorithm was over 26 d B. The signal-to-noise ratio of the existing method is less than 15 d B, and the noise-signal ratio of the new filtering algorithm has improved by 73%. Based on our results, the filtering effect of the proposed method is better than that of the present method. This study has great significance and practical value in engineering applications.

关键词： Coal-mineHoist wire ropeSignal processingFast morphological wavelet-filteringalgorithm

针灸联合六味地黄丸序贯治疗肾精亏虚型早发性卵巢功能不全临床观察

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中国中医药现代远程教育 2024年第13期22卷 110-112页

作者：王梅生周俊英王乐荣山东省济宁市中医院针灸科山东济宁272000

目的探究针灸联合六味地黄丸序贯治疗对肾精亏虚型早发性卵巢功能不全(POI)的临床效果。方法将63例POI患者纳入试验,于月经期、经后期口服六味地黄丸,排卵期、经前期行灸法序贯治疗,针刺治疗贯穿后三期,隔日1次,每周治疗3次;连续治疗3... 详细信息

目的探究针灸联合六味地黄丸序贯治疗对肾精亏虚型早发性卵巢功能不全(POI)的临床效果。方法将63例POI患者纳入试验,于月经期、经后期口服六味地黄丸,排卵期、经前期行灸法序贯治疗,针刺治疗贯穿后三期,隔日1次,每周治疗3次;连续治疗3个月经周期。观察序贯治疗对患者促卵泡生成激素(FSH)、促黄体生成素(LH)、雌二醇(E2)水平及中医证候积分的影响。结果治疗3个月后,患者E2增高,FSH、LH均降低,中医证候得到有效改善(P<0.05)。结论采用针灸联合六味地黄丸序贯治疗肾精亏虚型POI,能较好地改善性激素水平及临床症状,且具有良好安全性。

关键词：早发性卵巢功能不全肾精亏虚证针灸疗法六味地黄丸中医综合疗法

Development and application of the new BPM system data processing program at Hefei light source

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Nuclear Science and Techniques 2012年第5期23卷 261-266页

作者： MA Tianji YANG Yongliang SUN Baogen ZOU junying LU Ping zhou Zeran XU Hongliang NSRL School of Nuclear Science and Technology University of Science and Technology of China Hefei 230029 China

A data processing program has been applied for the new beam position monitor (BPM) system of the storage ring at Hefei Light Source (HLS). The new BPM system in the upgrade project will be equipped with Libera Brilliance BPM processors to replace the old Bergoz MX-BPM processors. The embedded Linux system on Libera has completed some important work, including instrument status check,data acquisition, position calculation, EPICS IOC data release,and so on. A new EPICS record type has been developed to recalculate the beam position with log-ratio method. The property of the new position data was analyzed in the time and frequency domain. The results show that the rms value of beam position measurement resolution can be up to submicron. Preliminary studies have been carried out on the measurement of the tune and the beam lifetime with this new BPM system.

关键词：数据处理程序 PM系统合肥光源嵌入式Linux系统 EPICS 应用开发位置数据

Bimetallic selenide heterostructure with directional built-in electricfield confined in N-doped carbon nanofibers for superior sodium storage with ultralong lifespan

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Journal of Energy Chemistry 2024年第4期91卷 407-416页

作者： junying Weng Degui Zou Wenyong Yuan Pengfei zhou Minghui Ding Jin zhou Hailin Cong Fangyi Cheng School of Materials Science and Engineering Shandong University of TechnologyZibo 255000ShandongChina School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Constructing heterostructure is considered as an effective strategy to address the sluggish electronic and ionic kinetics of anode materials for sodium ion batteries(SIBs).However,realizing the orientated growth and uniform distribution of the heterostructure is still a great ***,the regulated novel CoSe_(2)/NiSe_(2)heterostructure confined in N-doped carbon nanofibers(CoSe_(2)/NiSe_(2)@N-C)are prepared by using Co/Ni-ZIF template,in which,the CoSe_(2)/NiSe_(2)heterostructures realize uniform distribution on a micro *** from the unique heterostructure and N-doped carbon nanofibers,the CoSe_(2)/NiSe_(2)@N-C deliveries superior rate capability and durable cycle lifespan with a reversible capacity of 400.5 mA h g^(-1)after 5000 cycles at 2 A g^(-1).The Na-ion full battery with CoSe_(2)/NiSe_(2)@N-C anode and layered oxide cathode displays a remarkable energy density of 563 W h kg^(-1)with 241.1 W kg^(-1)at 0.1 A g^(-1).The theoretical calculations disclose that the periodic and directional built-in electric-field along with the heterointerfaces of CoSe_(2)/NiSe_(2)@N-C can accelerate electrochemical reaction *** in(ex)situ experimental measurements reveal the reversible conversion reaction and stable structure of CoSe_(2)/NiSe_(2)@N-C during Na+insertion/*** study highlights the potential ability of precisely controlled heterostructure to stimulate the electrochemical performances of advanced anode for SIBs.

关键词： CoSe_(2)/NiSe_(2) heterostructure Built-in electric-field Rate capability Ultralong lifespan Sodium ion batteries

Manipulating Na occupation and constructing protective film of P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2) as long-term cycle stability cathode for sodium-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 603-611,I0013页

作者： Yiran Sun Pengfei zhou Siyu Liu Zhongjun Zhao Yihao Pan Xiangyan Shen Xiaozhong Wu Jinping Zhao junying Weng Jin zhou School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 0255000ShandongChina School of Materials Science and Engineering Shandong University of TechnologyZibo 255049ShandongChina

P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2)(NNMO)is promising cathode material for sodium-ion batteries(SIBs)due to its high specific capacity and fast Na+diffusion ***,the irreversible P2-O_(2)phase transformation,Na+/vacancy ordering,and transition metal(TM)dissolution seriously damage its cycling stability and restrict its commercialization ***,Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp(LiPO_(2)F_(2))film-forming electrolyte *** Zn/Ti co-doping regulates the occupancy ratio of Nae/Nafat Na sites and disorganizes the Na+/vacancy ordering,resulting in a faster Na+diffusion kinetics and reversible P2-Z phase transition for P2-Na_(0.67)Ni_(0.28)Zn_(0.05)Mn_(0.62)Ti_(0.05)O_(2)(NNZMTO).Meanwhile,the LiPO_(2)F_(2)additive can form homogeneous and ultrathin cathode-electrolyte interphase(CEI)on NNZMTO surface,which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution,surface structure transformation,and micro-crack *** studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with Li PO_(2)F_(2)*** a result,the NNZMTO displays outstanding capacity retention of 94.44%after 500 cycles at 1C with 0.3 wt%Li PO_(2)F_(2),excellent rate performance of 92.5 mA h g^(-1)at 8C with 0.1 wt%Li PO_(2)F_(2),and remarkable full cell *** work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials,which provides a promising direction for developing high-performance cathodes for SIBs.

关键词： Layered cathode Zn/Ti co-doping Na occupation Electrolyte additive Sodium-ion batteries

Vibration response and safety control for blasting vibration of the existing tunnel with defects

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Underground Space 2024年第2期15卷 76-89页

作者： junying Xia Bo Wang Xinxin Guo Zhuoxiong Xie Key Laboratory of Transportation Tunnel Engineering Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China Guangdong Communication Planning&Design Institute Group Co. LtdGuangzhou 510507China

Current studies on blasting construction of small clear-distance tunnels have not considered the impact of existing tunnel lining defects when establishing safety *** paper offers a series of study results based on the blasting project of a new tunnel adjacent to the existing defect Xinling tunnel to thoroughly examine the dynamic response,safety control standards,and measures of the existing defect ***,structural models were developed to investigate the influence of the presence or absence of specific defects(like lining cracks and cavities behind the lining)on the dynamic response of the current tunnel lining to identify the most unfavorable defect ***,establish safety control standards for intact linings and those with the most unfavorable ***,two types of control measures,single safe charge and reasonable delay time,were studied based on the established safety control *** particular,the most adverse position of cracks was the wall facing the explosion,the rise in depth was more unfavorable for vibration response,and the impact of the longitudinal crack was restricted to the vicinity of the *** the vault was the most adverse cavity position,the rise in cavity area was more damaging,and the influence range varied with longitudinal cavity ***,the impact of cracks was mainly evident in the amplification effect of stress at the crack *** contrast,cavities had varied degrees of amplification effects on the vibration velocity and stress response and a relatively extensive influence *** control research was conducted,when the tunnel was intact,with a right wall crack,a vault cavity,and both vault cavity and crack for this project,the peak particle velocity(PPV)of the safety control standard for vibration velocity was 13,10,13,and 8 cm/s,respectively,and the respective single safe charge could be adjusted at 64,53,37,and 25 ***,the presence of different defects had a relati

关键词： Existing tunnel Defect Blasting construction Vibration response Control standards and measures

Metabolic disturbances in patients with narcolepsy

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Metabolic disturbances in patients with narcolepsy

Trace Cobalt Doping and Defect Engineering of High Surface Area α-Ni(OH)_(2) for Electrocatalytic Urea Oxidation

中国睡眠研究会第十五届全国学术年会

作者： Xinyan ZHANG junying zhou Min WU Sichuan University

Objectives: Narcolepsy is a chronic sleep-wake disorder driven by selective and irreversible orexin neuron *** with narcolepsy also present various metabolic alterations, proven to be with increased susceptibility than the control *** performed a systematic review and meta-analysis to delineate the prevalence rates of respective metabolic disturbances in ***: A meta-analysis was conducted on the prevalence rates of ‘any' metabolic disturbances in patients with *** databases(i.e., PubMed, Web of Science, EBSCO, and Cochrane Library) were searched up to date on 07 September *** effect size(ES) of the prevalence rate was the pooled mean with the random *** age cut-off of 18 years was chosen for sensitive *** the ES with insufficient values to perform meta-analysis, a systematic review was ***: A total of 28 studies(n=15281) were included in this *** studies(n=2351) were on narcoleptic subjects under 18 years old, and the other 18 studies(n=12930) were on older ones(≥ 18y).We found four metabolic disturbances were primarily reported in narcolepsy and the meta-analysis showed the prevalence rates were 31.9%(95%CI: 27.7%-36.1%) in overweight and 27.1%(95%CI: 21.5%-32.7%) in obesity, 28.8%(95%CI: 9.5%-48.1%) in dysglycaemia, 28.7%(95%CI: 16.7%-40.7%) in dyslipidemia, and 43.9%(95%CI: 20.7%-67.2%) in hypertension, ***, the prevalence rate of metabolic syndrome was 36.1%(95%CI: 14.6%-57.6%), which was found to be more prevalent in narcolepsy type *** addition, precocious puberty was also crossly recounted in pediatric narcoleptic studies, with a prevalence rate being 6.9%(95%CI: 12.7%-21.0%).Whilst, Vitamin D(54.8%, 95%CI: 37.1%-72.5%) and Vitamin 12 deficiency were found in adult narcoleptic *** terms of the subgroup analysis of age, the prevalence rate of overweight was increased from underage(<18y: 27.4%, 95%CI: 23.7%-31.1%) to adults(≥18y: 36.0%, 95%CI:

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Energy & Environmental Materials 2024年第2期7卷 111-118页

作者： Yi Liu Zhihui Yang Yuqin Zou Shuangyin Wang junying He School of Metallurgy and Environment Central South UniversityChangsha 410083China State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Owing to the intrinsically sluggish kinetics of urea oxidation reaction(UOR)involving a six-electron transfer process,developing efficient UOR electrocatalyst is a great challenge remained to be ***,by taking advantage of 2-Methylimidazole,of which is a kind of alkali in water and owns strong coordination ability to Co^(2+)in methanol,trace Co(1.0 mol%)addition was found to induce defect engineering onα-Ni(OH)_(2)in a dual-solvent system of water and *** characterization results revealed that the synthesized electrocatalyst(WM-Ni_(0.99)Co_(0.01)(OH)_(2))was a kind of defective nanosheet with thickness around 5-6 nm,attributing to the synergistic effect of Co doping and defect engineering,its electron structure was finely altered,and its specific surface a rea was tremendously enlarged from 68 to 172.3 m^(2)g^(-1).With all these merits,its overpotential to drive 10 mA cm^(-2)was reduced by 110 ***,the interfacial behavior of UOR was also well deciphered by operando electrochemical impedance spectroscopy.

关键词： defect engineering electrocatalysis small molecule oxidation

Measurement,Modelling and Analysis of Residence Time Distribution Characteristics in a Continuous Hydrothermal Reactor

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Journal of Thermal Science 2024年第4期33卷 1301-1311页

作者： LI Yi ZHAI Binjiang WANG junying WANG Weizuo JIN Hui State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an710049China

Understanding the residence time distribution(RTD)of a continuous hydrothermal reactor is of great significance to improve product quality and reaction *** this work,an on-line measurement system is attached to a continuous reactor to investigate the characteristics of *** approach that can accurately fit and describe the experimental measured RTD curve by finding characteristic values is proposed for analysis and *** RTD curves of three experiment groups are measured and the characteristic values are *** show that increasing total flow rate and extending effective reactor length have inverse effect on average residence time,but they both cause the reactor to approach a plug flow reactor and improve the materials *** branch flow rate fraction has no significant effect on RTD characteristics in the scope of the present work except the weak negative correlation with the average residence ***,the natural convection stirring effect can also increase the average residence time,especially when the forced flow is *** analysis reveals that it is necessary to consider the matching of natural convection,forced flow and reactor size to control RTD when designing the hydrothermal reactor and working conditions.

关键词： continuous reactor residence time distribution modelling