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Detection of Al, Mg, Ca, and Zn in copper slag by LIBS combined with calibration curve and PLSR methods
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作者 贾军伟 刘志峰 +1 位作者 潘从元 薛骅骎 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第2期132-138,共7页
The precise measurement of Al, Mg, Ca, and Zn composition in copper slag is crucial for effective process control of copper pyrometallurgy. In this study, a remote laser-induced breakdown spectroscopy(LIBS) system was... The precise measurement of Al, Mg, Ca, and Zn composition in copper slag is crucial for effective process control of copper pyrometallurgy. In this study, a remote laser-induced breakdown spectroscopy(LIBS) system was utilized for the spectral analysis of copper slag samples at a distance of 2.5 m. The composition of copper slag was then analyzed using both the calibration curve(CC) method and the partial least squares regression(PLSR) analysis method based on the characteristic spectral intensity ratio. The performance of the two analysis methods was gauged through the determination coefficient(R^(2)), average relative error(ARE), root mean square error of calibration(RMSEC), and root mean square error of prediction(RMSEP). The results demonstrate that the PLSR method significantly improved both R^(2) for the calibration and test sets while reducing ARE, RMSEC, and RMSEP by 50% compared to the CC method. The results suggest that the combination of LIBS and PLSR is a viable approach for effectively detecting the elemental concentration in copper slag and holds potential for online detection of the elemental composition of high-temperature molten copper slag. 展开更多
关键词 copper slag ELEMENT REMOTE LIBS PLSR
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Serum procalcitonin levels are associated with rhabdomyolysis following exertional heatstroke: an over 10-year intensive care survey
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作者 Li Zhong Feifei Shuai +3 位作者 Conglin Wang Lipeng Han zhifeng liu Ming Wu 《World Journal of Emergency Medicine》 SCIE CAS CSCD 2024年第1期23-27,共5页
BACKGROUND:Heatstroke has become a common emergency event in hospitals.Procalcitonin(PCT)is used as a biomarker of infection in the emergency department(ED),but its role in rhabdomyolysis(RM)following exertional heats... BACKGROUND:Heatstroke has become a common emergency event in hospitals.Procalcitonin(PCT)is used as a biomarker of infection in the emergency department(ED),but its role in rhabdomyolysis(RM)following exertional heatstroke(EHS)remains unclear.METHODS:A retrospective cohort study enrolled patients with EHS from the intensive care unit(ICU).We collected RM biomarkers,inflammation markers,critical disease scores at admission,24 h,48 h,and discharge,and 90-day mortality.Correlation analysis,linear regression and curve fi tting were used to identify the relationship between PCT and RM.RESULTS:A total of 162 patients were recruited and divided into RM(n=56)and non-RM(n=106)groups.PCT was positively correlated with myoglobin(Mb),acute hepatic injury,disseminated intravascular coagulation(DIC),Sequential Organ Failure Assessment(SOFA)score,and Acute Physiology and Chronic Health Evaluation II(APACHE II)score,with correlation coefficients of 0.214,0.237,0.285,0.454,and 0.368,respectively(all P<0.05).Interestingly,the results of curve fi tting revealed a nonlinear relationship between PCT and RM,and a two-piecewise linear regression model showed that PCT was related to RM with an odds ratio of 1.3 and a cut-off of<4.6 ng/mL.Survival analysis revealed that RM was associated with higher mortality compared to non-RM cases(P=0.0093).CONCLUSION:High serum PCT concentrations are associated with RM after EHS in critically ill patients.Elevated PCT concentrations should be interpreted cautiously in patients with EHS in the ED. 展开更多
关键词 PROCALCITONIN MYOGLOBIN RHABDOMYOLYSIS Exertional heatstroke
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An investigation of the influence of intestinal flora in external traditional Chinese medicine therapy 被引量:1
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作者 Hourong Wang zhifeng liu +6 位作者 Tianyuan Yu Yingqi Zhang Yi Jiao Di liu Yajing Xu Qian Guan Mengqian Lu 《Journal of Traditional Chinese Medical Sciences》 CAS 2023年第1期10-18,共9页
External therapy,which has been used for millennia to treat disease,has now become the newest member of complementary and alternative therapies.A growing number of clinical studies and animal experiments have shown th... External therapy,which has been used for millennia to treat disease,has now become the newest member of complementary and alternative therapies.A growing number of clinical studies and animal experiments have shown that external therapy exerts a positive effect on the intestinal flora.In this paper,we review the research related to external therapy on various systemic diseases and focus on changes in the intestinal flora.We found that studies on external therapy are dominated by acupuncture and tuina,primarily aimed at the treatment of digestive and neurological diseases.However,the deeper mechanism of regulation of the intestinal flora by external therapy has not yet been experimentally confirmed. 展开更多
关键词 Traditional Chinese medicine External therapy Intestinal flora Digestive diseases Neurological diseases ACUPOINT MECHANISM
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Bearing Defect Detection Based on Acoustic Feature Extraction and Statistical Learning
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作者 Di Wu Jinlong Sun +3 位作者 zhifeng liu Ziqian Zhang Min Huang Zhongzhe Xiao 《Journal of Applied Mathematics and Physics》 2021年第11期2927-2935,共9页
<div style="text-align:justify;"> Bearings are widely utilized as key components in industrial scenarios. Therefore, the automatic and precise inspection of bearing defects is imperative for the manufa... <div style="text-align:justify;"> Bearings are widely utilized as key components in industrial scenarios. Therefore, the automatic and precise inspection of bearing defects is imperative for the manufacturing of the bearing. In this paper, a novel defect detection method based on acoustics is proposed to further improve both the accuracy and the efficiency of the defection process. We firstly constructed a labeled dataset composed of acoustic signals sampling from different bearings with a certain rotational speed. OpenSMILE is adopted to extract the acoustic features and the target acoustic feature dataset with 6373 features is formed. To further improve the efficiency of the proposed method, a feature selection strategy based on the chi-square test is adopted to eliminate the most inefficient features. Several statistical learning models are constructed and trained as the classifier. Eventually, the performance of classifiers is evaluated and achieves relatively high accuracy and efficiency with an extremely imbalanced dataset. </div> 展开更多
关键词 Bearing Defect Detection Feature Extraction Machine Learning
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利用非贵金属等离子体Al修饰TiO2/Cu2O异质结以提高光电催化分解水性能 被引量:3
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作者 张劭策 刘志锋 +2 位作者 闫卫国 郭振刚 阮梦楠 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第12期1884-1893,共10页
在光电化学(PEC)中,利用半导体纳米材料分解水产生氧气和氢气成为解决能源和环境危机的有效途径,而设计具有较高的光子捕获效率和电荷分离率的低成本光电极是研究的重点.近年来,已有许多半导体材料(例如ZnO,Fe2O3,WO3,Cu2O,CuInS2等)被... 在光电化学(PEC)中,利用半导体纳米材料分解水产生氧气和氢气成为解决能源和环境危机的有效途径,而设计具有较高的光子捕获效率和电荷分离率的低成本光电极是研究的重点.近年来,已有许多半导体材料(例如ZnO,Fe2O3,WO3,Cu2O,CuInS2等)被用做光电极参与光电催化分解水.其中,TiO2作为一种n型半导体,由于其具有适当的导带(CB)和价带(VB)位置、良好的耐光腐蚀性、无毒性和出色的稳定性而引起人们的关注.然而,光响应范围窄,光生载流子复合率高等问题限制了TiO2光电极在PEC水分解中的应用.因此,选用合适的窄禁带半导体和助催化剂进行复合修饰能够有效地扩大光响应范围,促进载流子的分离和转移,从而提升电极的光电催化性能.本文利用具有表面等离子体共振(SPR)效应的Al对TiO2/Cu2O核/壳异质结进行改性,制备了TiO2/Cu2O/Al/Al2O3光电阳极.SEM和TEM等结果显示已成功合成核/壳异质结.UV-vis吸收光谱和UPS测试计算表明,Cu2O不仅可以显著扩展电极的吸光范围,且计算所得TiO2和Cu2O导价带位置验证了p-n异质结的合成.结合光电流、EIS等测试,证明了异质结能够有效地促进光生载流子的分离和转移.同时,在光照激发下,UV-vis吸收光谱在550 nm出现明显的特征峰,表明Al的SPR效应被成功激发.Al纳米颗粒的SPR效应不仅可以产生热电子,并能够增强与异质结界面处的电场.之后,通过Mott-Schottk测试和Bode图,较为直观地说明了异质结和SPR效应的协同作用能够增加载流子的浓度,抑制电子空穴的复合,使所制备的TiO2/Cu2O/Al/Al2O3光电阳极表现出良好的光电性能,其光电流达到了4.52 mA/cm^2(1.23 V vs.RHE),是TiO2/Cu2O异质结的1.84倍.相比于同样具有SPR效应的Au,Ag等贵金属而言,Al不仅价格低廉,而且在空气中自发形成的超薄Al2O3薄膜能够有效地抑制Al的进一步氧化,并作为保护层能够显著提高电极的稳定性.在对样品稳定性的测试中,由于Al2O3保护层的存在,电极的稳定性提高了53%.本文对样品的实验测试和原理分析表明了异质结和非贵金属Al的SPR效应的协同作用显著提高了光电极的光电性能,为设计具有良好性能和高实用性的电极提供了新思路. 展开更多
关键词 二氧化钛 光电阳极 非贵金属铝 表面等离子体共振 光电催化分解水
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基于流动化学平台的3-(2-羟基苯基)-1-(吡啶-3-基)丙-2-烯-1-酮合成实验改进 被引量:1
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作者 王文权 刘萌 +3 位作者 孙康 刘智峰 季晓晖 刘全 《大学化学》 CAS 2022年第7期121-127,共7页
流动化学技术相较于传统间歇式反应,具有高传热与传质效率、高反应安全性、短反应时间以及可精准控制反应参数等优点,从而成为有机合成中最具潜力的技术之一。国外多所高校已经开设流动化学相关课程实验,而我国相关课程实验仍处于起步... 流动化学技术相较于传统间歇式反应,具有高传热与传质效率、高反应安全性、短反应时间以及可精准控制反应参数等优点,从而成为有机合成中最具潜力的技术之一。国外多所高校已经开设流动化学相关课程实验,而我国相关课程实验仍处于起步阶段。本实验将传统有机实验中Claisen-Schmidt反应合成查尔酮衍生物进行改进,通过搭建液相-液相流动化学反应平台进行流动化学合成,并通过紫外-可见光谱仪对反应过程进行监测。该实验在实现相同教学目的下,具有反应时间短、现象明显、碱用量少等显著优势。 展开更多
关键词 流动化学 Claisen-Schmidt反应 查尔酮衍生物 合成
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Quantifying urbanization levels on the Tibetan Plateau with high-resolution nighttime light data 被引量:6
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作者 Yihang Wang zhifeng liu +3 位作者 Chunyang He Pei Xia Ziwen liu Haimeng liu 《Geography and Sustainability》 2020年第3期233-244,共12页
The Tibetan Plateau(TP)is undergoing rapid urbanization.To improve urban sustainability and construct eco-logical security barriers,it is essential to quantify the spatial patterns of urbanization level on the TP,but ... The Tibetan Plateau(TP)is undergoing rapid urbanization.To improve urban sustainability and construct eco-logical security barriers,it is essential to quantify the spatial patterns of urbanization level on the TP,but the existing studies on the topic have been limited by the lack of socioeconomic data.This study aims to quantify the urbanization level on the TP in 2018 with Luojia1-01(LJ1-01)high-resolution nighttime light(NTL)data.Specifically,the compounded night light index is used to quantify spatial patterns of urbanization level at mul-tiple scales.The results showed that the TP had a low overall urbanization level with a large internal difference.The urbanization level in the northeast,southeast and south of the TP was relatively high,forming three hotspots centered in Xining City,Lhasa City and Shangri-La City,while the urbanization level in the central and western regions was relatively low.The analysis of influencing factors,based on the random forest model,showed that transportation and topography were the main factors affecting the TP’s spatial patterns of urbanization level.The comparison analysis with socioeconomic statistics and traditional NTL data showed that LJ1-01 NTL data can be used to more effectively quantify the urbanization level since it is more advantageous for reflecting the spatial extent of urban land and describing the spatial structure of socioeconomic activities within urban areas.These advantages are attributed to the high spatial resolution of the data,appropriate imaging time and unaf-fected by saturation phenomena.Thus,the proposed LJ1-01 NTL-based urbanization level measurement method has the potential for wide applications around the world,especially in less-developed regions lacking statistical data.Using this method,we refined the measurement of the TP’s urbanization level in 2018 for multiple scales including the region,basin,prefecture and county levels,which provides basic information for the further urban sustainability research on the TP. 展开更多
关键词 Tibetan Plateau URBANIZATION LuoJia1-01 nighttime light data Cold region Dryland Urban landscape sustainability
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An Efficient Bar Code Image Recognition Algorithm for Sorting System 被引量:3
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作者 Desheng Zheng Ziyong Ran +2 位作者 zhifeng liu Liang Li Lulu Tian 《Computers, Materials & Continua》 SCIE EI 2020年第9期1885-1895,共11页
In the sorting system of the production line,the object movement,fixed angle of view,light intensity and other reasons lead to obscure blurred images.It results in bar code recognition rate being low and real time bei... In the sorting system of the production line,the object movement,fixed angle of view,light intensity and other reasons lead to obscure blurred images.It results in bar code recognition rate being low and real time being poor.Aiming at the above problems,a progressive bar code compressed recognition algorithm is proposed.First,assuming that the source image is not tilted,use the direct recognition method to quickly identify the compressed source image.Failure indicates that the compression ratio is improper or the image is skewed.Then,the source image is enhanced to identify the source image directly.Finally,the inclination of the compressed image is detected by the barcode region recognition method and the source image is corrected to locate the barcode information in the barcode region recognition image.The results of multitype image experiments show that the proposed method is improved by 5+times computational efficiency compared with the former methods,and can recognize fuzzy images better. 展开更多
关键词 Bar code recognition Hough transformation BINARIZATION image processing
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Photocatalytic decompositions of gaseous HCHO and methylene blue with highly ordered TiO_2 nanotube arrays 被引量:2
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作者 Lixia Li Jing Ya +2 位作者 Fengjiao Hu zhifeng liu Lei E 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第4期740-746,共7页
The highly ordered TiO2 nanotubes (NTs) were fabricated by the anodic oxidation method. Their morphology, structure and crystalline phase were characterized by scanning electron microscopy (SEM) and X-ray diffractomet... The highly ordered TiO2 nanotubes (NTs) were fabricated by the anodic oxidation method. Their morphology, structure and crystalline phase were characterized by scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The effects of morphology, specific surface area, pore structures and photo catalytic activity of the TiO2 NTs were investigated. UV-vis spectra analysis showed that its light absorption had been extended to the visible light range. The photocatalytic activity of the as-prepared samples was evaluated by photocatalytic oxidation of gaseous HCHO and MB aqueous solution. The samples had better adhesion strength in the dark and showed a higher photocatalytic activity than nanoparticles. Especially, with ultraviolet light pretreatment, the nanotubes exhibited more stable active for photocatalytic decomposition and the photodecomposition rate remained at high level after 3 cycles of the photocatalysis experiment. Thus, how the number of surface active group center dot OH increased and the mechanism for the great improvement for the photocatalytic activity are discussed. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved. 展开更多
关键词 TiO2 nanotube arrays PHOTOCATALYSIS Visible light Ultraviolet light pretreatment
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Preventing crash in stock market:The role of economic policy uncertainty during COVID‑19 被引量:2
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作者 Peng‑Fei Dai Xiong Xiong +2 位作者 zhifeng liu Toan Luu Duc Huynh Jianjun Sun 《Financial Innovation》 2021年第1期654-668,共15页
This paper investigates the impact of economic policy uncertainty(EPU)on the crash risk of US stock market during the COVID-19 pandemic.To this end,we use the GARCHS(GARCH with skewness)model to estimate daily skewnes... This paper investigates the impact of economic policy uncertainty(EPU)on the crash risk of US stock market during the COVID-19 pandemic.To this end,we use the GARCHS(GARCH with skewness)model to estimate daily skewness as a proxy for the stock market crash risk.The empirical results show the significantly negative correlation between EPU and stock market crash risk,indicating the aggravation of EPU increase the crash risk.Moreover,the negative correlation gets stronger after the global COVID-19 outbreak,which shows the crash risk of the US stock market will be more affected by EPU during the epidemic. 展开更多
关键词 COVID-19 Economic policy uncertainty Crash risk SKEWNESS
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Photocatalytic activity of different morphology BiPO_4 supported on zeolite 被引量:1
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作者 Haiyan Yu Ting Cui zhifeng liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第4期621-626,共6页
Highly efficient sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite had been successfully synthesized by a standard hydrothermal method. The addition of assistant reagent in the hydrothermal system is promisi... Highly efficient sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite had been successfully synthesized by a standard hydrothermal method. The addition of assistant reagent in the hydrothermal system is promising to obtain special morphology. The assistant reagent (EDTA) acts as a growth modifier of crystal. The possible formation mechanisms of sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite were schematically discussed. A detailed study of sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite impacted on the photodecoloration methylene blue (MB) solution showed that the composite had a highly reusable and stable property for long-run photocatalytic application. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved. 展开更多
关键词 ZEOLITE BiPO4 Ball-flower-like Sheet-like PHOTOCATALYTIC
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g-C_3N_4基多功能层光阳极在光电化学水分解中的应用(英文) 被引量:1
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作者 刘志锋 鲁雪 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第9期1527-1533,共7页
光电化学分解水制氢可以一并解决环境问题和能源危机,因而成为研究热点.由于TiO_2 禁带宽度较大,不能有效吸收太阳光中的可见光,使光电化学分解水制氢的应用受限.g-C_3N_4的禁带宽度约为2.7 e V,能有效吸收可见光,但g-C_3N_4薄膜制备研... 光电化学分解水制氢可以一并解决环境问题和能源危机,因而成为研究热点.由于TiO_2 禁带宽度较大,不能有效吸收太阳光中的可见光,使光电化学分解水制氢的应用受限.g-C_3N_4的禁带宽度约为2.7 e V,能有效吸收可见光,但g-C_3N_4薄膜制备研究较少.我们通过热聚缩合法直接在FTO导电玻璃上制备出g-C_3N_4薄膜,发现其光电化学分解水制氢稳定性不高,选择易制备的TiO_2 作为保护层可以提高g-C_3N_4的耐用性.此外,为提高g-C_3N_4光生电子空穴对的分离能力,依靠Co-Pi对光生空穴的捕获作用而将其覆盖在最外层.因此本文首次制备一种新型的g-C_3N_4/TiO_2 /Co-Pi光阳极用于光电化学分解水制氢,其中g-C_3N_4用作光吸收层,TiO_2 用作保护层,Co-Pi用作空穴捕获层.并在此基础上,通过扫描电子显微镜(SEM),X射线衍射(XRD),紫外可见光谱(UV-Vis)等手段研究了g-C_3N_4/TiO_2 /Co-Pi光阳极的形貌特征和光电化学性能.SEM、EDS和XRD结果表明,g-C_3N_4/TiO_2 /Co-Pi光阳极被成功制备在了FTO导电玻璃上,厚度约为3μm.UV-Vis测试表明,g-C_3N_4的光吸收边约为470 nm,可以有效地吸收可见光,并且g-C_3N_4的框架结构使光多次反射折射增加了光的捕获能力,由此可见,g-C_3N_4能够发挥很好的光吸收层作用.通过对g-C_3N_4光阳极,g-C_3N_4/TiO_2 光阳极和g-C_3N_4/TiO_2 /Co-Pi光阳极的电流电压测试发现,g-C_3N_4/TiO_2 光阳极的光电流密度小于g-C_3N_4光阳极,而g-C_3N_4/TiO_2 /Co-Pi光阳极的光电流密在可逆氢电极1.1 V下达到了0.346 mA?cm–2,约为单独g-C_3N_4光阳极的3.6倍.这说明Co-Pi是提升g-C_3N_4光电化学性能的主要因素.电化学阻抗测试结果发现,g-C_3N_4/TiO_2 /Co-Pi光阳极的界面电荷转移电阻小于g-C_3N_4光阳极的,这表明g-C_3N_4/TiO_2 /Co-Pi光阳极界面处载流子转移较快,同时也能促进内部光生电子空穴对的分离,整体性能的提高应该主要归因于Co-Pi对光生空穴的捕获作用.恒电压时间测试展示出g-C_3N_4/TiO_2 /Co-Pi光阳极的光电流密度在2 h测试过程中没有明显下降,表明g-C_3N_4/TiO_2 /Co-Pi光阳极是相当稳定的,具有良好的耐用性,归因于TiO_2 和Co-Pi的共同保护作用,主要归因于TiO_2 层对FTO导电玻璃上的g-C_3N_4薄膜保护,从电化学沉积Co-Pi到所有测试结束.总体而言,g-C_3N_4/TiO_2 /Co-Pi光阳极加强的光电化学性能归因于以下几个因素:(1)g-C_3N_4优异的光吸收能力;(2)TiO_2 稳定的保护提升了g-C_3N_4薄膜的耐用性;(3)Co–Pi对光生空穴的捕获有效促进了光生电子空穴对的分离. 展开更多
关键词 g-C3N4 TIO2 Co-Pi 光阳极 光电化学水分解
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Study on fault-controlled hydrocarbon migration and accumulation process and models in Zhu I Depression 被引量:1
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作者 Wenqi Zhu Keqiang Wu +2 位作者 Ling Ke Kai Chen zhifeng liu 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2021年第2期107-113,共7页
Through the analysis of the faults and their internal structure in Zhu I Depression,it is found that the internal structure of the late fault is obviously segmented vertically.It develops unitary structure(simple faul... Through the analysis of the faults and their internal structure in Zhu I Depression,it is found that the internal structure of the late fault is obviously segmented vertically.It develops unitary structure(simple fault plane)in shallow layers,binary structure(induced fracture zone in hanging wall and sliding fracture zone in footwall)in middle,layers and ternary structure(induced fracture zone in hanging wall and sliding fracture zone in middle,and induced fracture zone in footwall)in deep layers.Because the induced fracture zone is a high porosity and permeability zone,and the sliding fracture zone is a low porosity and ultra-low permeability zone,the late fault in middle layers has the character of"transporting while sealing".The late fault can transport hydrocarbon by its induced fracture zone in the side of the hanging wall and seal hydrocarbon by its sliding fracture zone in the side of the footwall.In deep layers,the late fault has the character of"dual-transportation",induced fracture zones in both sides of hanging wall and footwall can transport hydrocarbon.The early fault that only developed in the deep layers is presumed to be unitary structure,which plays a completely sealing role in the process of hydrocarbon migration and accumulation due to inactivity during the hydrocarbon filling period.Controlled by hydrocarbon source,early/late faults,sand bodies and traps,two reservoir-forming models of"inverted L"and"stereo-spiral"can be proposed in middle layers,while two reservoir-forming models of"cross fault"and"lateral fault sealing"are developed in the deep layers of Zhu I Depression. 展开更多
关键词 fault structure transport/sealing migration and accumulation process reservoir-forming model Zhu I Depression
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Genetic parameters estimation for growth traits in cultured tiger pufferfish(fugu),Takifugu rubripes
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作者 Xin’an Wang Aijun Ma +3 位作者 zhifeng liu Zhibin Sun Liguang Zhu Haowen Chang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2022年第12期73-79,共7页
The aim of this study was to evaluate the genetic parameters of the growth performance of Takifugu rubripes.Heritabilities and genetic correlations were estimated for body weight(BW),body length(BL),total length(TL),c... The aim of this study was to evaluate the genetic parameters of the growth performance of Takifugu rubripes.Heritabilities and genetic correlations were estimated for body weight(BW),body length(BL),total length(TL),chest measurement(CM)and trunk length(TKL)of T.rubripes from measurements of progeny at 6 months and 12 months.The results showed that the heritability was 0.37 for BW6,0.19 for BL6,0.35 for TL6,0.29 for CM6,0.26 for TKL6,0.36 for BW12,0.26 for BL12,0.25 for TL12,0.31 for CM12 and 0.15 for TKL12.The range of genetic correlations estimated at 6 months was 0.025–0.725 and−0.002–0.706 at 12 months.The results indicated that genetic improvement for faster growth rate or increased body weight in cultured T.rubripes was effective.Based on selection theory,the selection strategy for traits with medium heritability is flexible.Considering that these growth traits do not reach the high level of heritability,family selection should be expected.Given positive genetic correlations among BW,BL,TL,CM,and TKL at 6 months,the five traits could be improved simultaneously through selective breeding.As there was high genetic correlation only between BW12,BL12 and TL12,and negative correlations between TKL12 and BL12 as well as between CM12 and TL12,and only BW,BL and TL at 12 months could be improved simultaneously. 展开更多
关键词 FAMILY genetic evaluation HERITABILITY genetic correlation
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Effect of pediatric tuina on hypothalamic metabolites in young rabbits using liquid chromatography-mass spectrometry
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作者 zhifeng liu Yi Jiao +7 位作者 Tianyuan Yu Yingqi Zhang Di liu Hourong Wang Yajing Xu Qian Guan Taotao Lv Jian Shu 《Journal of Traditional Chinese Medical Sciences》 2022年第2期188-196,共9页
Objective: To investigate the changes in the hypothalamic metabolites of lipopolysaccharide(LPS) febrile young rabbits after the treatment with pediatric tuina.Methods: A total of 30 young rabbits were randomly assign... Objective: To investigate the changes in the hypothalamic metabolites of lipopolysaccharide(LPS) febrile young rabbits after the treatment with pediatric tuina.Methods: A total of 30 young rabbits were randomly assigned into three groups: the normal group, the model group, and the tuina group. Both the model group and the tuina group were injected intravenously with LPS. “Six antipyretic manipulations”(pushing Tianmen, pushing Kangong, kneading Taiyang,kneading Erhougaogu, clearing Tianheshui, and pushing Jizhu) were administered 1 h after the LPS injection in the tuina group. The rectal temperatures of the young rabbits were monitored during the experiment to explore the antipyretic effect. Three hours after the injection, the content of interleukin-1β(IL-1β), tumor necrosis factor(TNF)-a, and prostaglandin E;(PGE;) in the serum was detected. In addition, liquid chromatography-mass spectrometry(LC-MS) was used for the hypothalamus metabolomics.Results: Compared with the model group, the rectal temperature of the tuina group was decreased at 2 h and 3 h after the LPS injection(P =.04, P =.03, respectively), and the content of IL-1β, TNF-a, and PGE2was decreased(P =.03, P =.003, and P =.008, respectively). The metabolomics results showed that there were 23 potential biomarkers after the tuina intervention, enriching 27 pathways. Lipid metabolites,especially glycerophospholipids, were a majority of the altered metabolites. The primary metabolic pathways affected by tuina included the arachidonic acid metabolism, the GABAergic synapse, D-glutamine and D-glutamate metabolism, and the glutamatergic synapse.Conclusion: Pediatric tuina reduced the temperature of the febrile rabbits and downregulated the expression of IL-1β, TNF-a, and PGE2, and the antipyretic mechanism may be related to changes in metabolites and metabolic pathways in the hypothalamus. 展开更多
关键词 FEVER Pediatric tuina Metabolomics Liquid chromatography coupled with mass spectrometry HYPOTHALAMUS INTERLEUKIN-1B Tumor necrosis factor-a Prostaglandin E_(2)
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Analysis of Mobile Phone Reliability Based on Active Disassembly Using Smart Materials
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作者 zhifeng liu liuxian Zhao +2 位作者 Jun Zhong Xinyu Li Huanbo Cheng 《Journal of Surface Engineered Materials and Advanced Technology》 2011年第2期80-87,共8页
When using shape memory materials into active disassembly of actual electronic products, because the elastic modulus of shape memory materials is affected by the temperature is relatively large, therefore, the main di... When using shape memory materials into active disassembly of actual electronic products, because the elastic modulus of shape memory materials is affected by the temperature is relatively large, therefore, the main difference of environmental reliability between active disassembly products and common products is the impact of collision and vibration under different temperature. Establishing three-dimensional analysis model, comparing the impact of collision and vibration of mobile phone shells which are made up of PVC materials after casting & radiation and PC/ABS materials under different temperature. Analyzing the reliability of mobile phone under different temperature and optimizing its structure according to data of testing. 展开更多
关键词 Active DISASSEMBLY Mobile PHONE ENVIRONMENTAL RELIABILITY ANALYSIS of COLLISION ANALYSIS of Vibration
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Incomplete Image Completion through GAN
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作者 Biying Deng Desheng Zheng +2 位作者 zhifeng liu Yanling Lai Zhihong Zhang 《Journal of Quantum Computing》 2021年第3期119-126,共8页
There are two difficult in the existing image restoration methods.One is that the method is difficult to repair the image with a large damaged,the other is the result of image completion is not good and the speed is s... There are two difficult in the existing image restoration methods.One is that the method is difficult to repair the image with a large damaged,the other is the result of image completion is not good and the speed is slow.With the development and application of deep learning,the image repair algorithm based on generative adversarial networks can repair images by simulating the distribution of data.In the process of image completion,the first step is trained the generator to simulate data distribution and generate samples.Then a large number of falsified images are quickly generated using the generative adversarial network and search for the code of the closest damaged image.Finally,the generator generates missing content by using this code.On this basis,this paper combines the semantic loss function and the perceptual loss function.Experimental result show that the method successfully predicts the information of large areas missing in the image,and realizes the photorealism,producing clearer and more consistent results than previous methods. 展开更多
关键词 Deep learning generative adversarial network convolutional neural network image completion image repair
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Implementation of Art Pictures Style Conversion with GAN
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作者 Xinlong Wu Desheng Zheng +3 位作者 Kexin Zhang Yanling Lai zhifeng liu Zhihong Zhang 《Journal of Quantum Computing》 2021年第4期127-136,共10页
Image conversion refers to converting an image from one style to another and ensuring that the content of the image remains unchanged.Using Generative Adversarial Networks(GAN)for image conversion can achieve good res... Image conversion refers to converting an image from one style to another and ensuring that the content of the image remains unchanged.Using Generative Adversarial Networks(GAN)for image conversion can achieve good results.However,if there are enough samples,any image in the target domain can be mapped to the same set of inputs.On this basis,the Cycle Consistency Generative Adversarial Network(CycleGAN)was developed.This article verifies and discusses the advantages and disadvantages of the CycleGAN model in image style conversion.CycleGAN uses two generator networks and two discriminator networks.The purpose is to learn the mapping relationship and inverse mapping relationship between the source domain and the target domain.It can reduce the mapping and improve the quality of the generated image.Through the idea of loop,the loss of information in image style conversion is reduced.When evaluating the results of the experiment,the degree of retention of the input image content will be judged.Through the experimental results,CycleGAN can understand the artist’s overall artistic style and successfully convert real landscape paintings.The advantage is that most of the content of the original picture can be retained,and only the texture line of the picture is changed to a level similar to the artist’s style. 展开更多
关键词 Generative adversary network deep learning image style conversion convolutional neural network adversary learning
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Study on the microcosmic superlubricity mechanism of PVPA affected by metal cations
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作者 Hongyun CAI Caixia ZHANG +4 位作者 Fuping LI Mengmeng liu Tao ZHANG Hongyan CHU zhifeng liu 《Friction》 SCIE EI CAS CSCD 2023年第7期1150-1164,共15页
Hydrophilic polymer coatings on artificial implants generate excellent tribological properties.The friction properties of polymer coatings are affected by salt ion factors.Herein,the atomic force microscopy(AFM)was us... Hydrophilic polymer coatings on artificial implants generate excellent tribological properties.The friction properties of polymer coatings are affected by salt ion factors.Herein,the atomic force microscopy(AFM)was used to show that the superlubricity was achieved between poly(vinylphosphonic acid)(PVPA)-modified Ti6Al4V and polystyrene(PS)microsphere probe lubricated with monovalent salt solutions(LiCl,NaCl,KCl,and CsCl).Considering that adhesion is an important cause of friction changes,the AFM was further utilized to obtain adhesion between friction pairs in different salt solutions.The results indicated that the larger the cation radius in the lubricant,the smaller the adhesion,and the lower the friction coefficient of the PVPA coating.The electrostatic interaction between the PVPA and one-valence cations in lubricants was analyzed by the molecular dynamics(MD)simulation as it was found to be the main influencing factor of the adhesion.Combined analysis results of friction and adhesion indicated that by adjusting the size of cation radius in lubricant,the adhesion between the tribo-pairs can be changed,and eventually the magnitude of friction can be affected.This study opens up a new avenue for analyzing the friction characteristics of hydrophilic polymer coatings from the perspective of intermolecular forces. 展开更多
关键词 atomic force microscopy(AFM) SUPERLUBRICITY poly(vinylphosphonic acid)(PVPA) CATION ADHESION molecular dynamics(MD)simulation
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Xuebijing injection alleviates liver injury by inhibiting secretory function of Kupffer cells in heat stroke rats 被引量:14
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作者 Yi Chen Huasheng Tong +5 位作者 Xingqin Zhang Liqun Tang Zhiguo Pan zhifeng liu Pengkai Duan Lei Su 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2013年第2期243-249,共7页
OBJECTIVE:To evaluate the effects of Xuebijing(XBJ) injection in heat stroke(HS) rats and to investigate the mechanisms underlying these effects.METHODS:Sixty anesthetized rats were randomized into three groups and in... OBJECTIVE:To evaluate the effects of Xuebijing(XBJ) injection in heat stroke(HS) rats and to investigate the mechanisms underlying these effects.METHODS:Sixty anesthetized rats were randomized into three groups and intravenously injected twice daily for 3 days with 4 mL XBJ(XBJ group) or phosphate buffered saline(HS and Sham groups) per kg body weight.HS was initiated in the HS and XBJ groups by placing rats in a simulated climate chamber(ambient temperature 40 ℃,humidity 60%).Rectal temperature,aterial pressure,and heart rate were monitored and recorded.Time to HS onset and survival were determined,and serum concentrations of tumor necrosis factor(TNF)-α,inRESULTS:Time to HS onset and survival were significantly longer in the XBJ than in the HS group.Moreover,the concentrations of TNF-α,IL-1β,IL-6,ALT and AST were lower and liver injury was milder in the XBJ than in the HS group.Heat-stress induced structural changes in KCs and hepatic cells were more severe in the HS than in the XBJ group and the concentrations of TNF-α,IL-β and IL-6 secreted by KCs were lower in the XBJ than in the HS group.CONCLUSION:XBJ can alleviate HS-induced systemic inflammatory response syndrome and liver injury in rats,and improve outcomes.These protective effects may be due to the ability of XBJ to inhibit cytokine secretion by KCs. 展开更多
关键词 分泌功能 枯否细胞 肝损伤 注射液 大鼠 中暑 TNF-α IL-6
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