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Springback behavior of tailor rolled blank in u-shape forming

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Journal of Iron and Steel Research International 2017年第8期24卷 787-794页

作者： Ri-huan lu.Xiang-hua Liu shou-dong Chen lu.Feng Xian-lei Hu Li-zhong Liu State Key Laboratory of Rolling&Automation Northeastern UniversityShenyang 110819LiaoningChina School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina

The springback of tailor rolled blanks with quenching and partitioning steels was *** order to find out the springback behavior and related influ.nce factors for the novel sheets,both experimental and simulation methods have been used to compare and analyze the springback characteristics of equal thickness blanks and tailor rolled blanks in u-channel *** the results,the overall springback angles of tailor rolled blanks at thin and thick sides are respectively 106.79° and 99.705°,which are both lower than those of the corresponding equal thickness *** to the existence of the thickness transition zone,the stress distribution in thin and thick sides of blanks is *** location of dangerous region in thin side of tailor rolled blanks is closer to the end of side,and the thick side moved to the middle of straight wall,which are different with the equal thickness ***,the released quantitles of tangential stress and strain per unit section of blank are adopted to calculate relative springback angles and give novel evalu.tion criteria for qualitatively analyzing the amount of springback *** comparing the results,it shows that the tangential strain method is more suitable for the actual situation.

关键词： Tailor rolled blank Springback angle Elastic recovery Tangential stress Tangential strain

法布雷病患儿酶替代治疗临床观察及抗药抗体监测

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中华儿科杂志 2025年第1期63卷 75-79页

作者：路智红寿心怡林倩章玲霞傅海东毛建华浙江大学医学院附属儿童医院肾脏内科国家儿童健康与疾病临床医学研究中心杭州

目的分析法布雷病患儿酶替代治疗及抗药抗体生成情况。方法回顾性病例总结。收集2021年7月至2024年6月在浙江大学医学院附属儿童医院酶替代治疗1年以上的7例法布雷病患儿的基本信息, 治疗前后相关化验、检查等临床资料。采用配对样本t... 详细信息

目的分析法布雷病患儿酶替代治疗及抗药抗体生成情况。方法回顾性病例总结。收集2021年7月至2024年6月在浙江大学医学院附属儿童医院酶替代治疗1年以上的7例法布雷病患儿的基本信息, 治疗前后相关化验、检查等临床资料。采用配对样本t检验比较治疗前后肾小球滤过率、左心质量指数、疼痛强度评分等相关指标的差异。通过酶联免疫吸附法检测抗药抗体。结果 7例患儿中男6例、女1例, 确诊年龄(12.2±1.8)岁。在酶替代治疗1年时, 7例患儿的异常底物脱乙酰基三己糖酰基鞘酯醇和疼痛强度评分均较治疗前有明显降低[(16±11)比(63±42)μg/L, (22±19)比(45±29)分, t=3.88、3.43, 均P0.05]。例4、5、6分别在用药后1、4、1个月时出现抗药抗体。例4患儿抗药抗体滴度持续高值(吸光度 3.65～3.73)且伴随荨麻疹、脱乙酰基三己糖酰基鞘酯醇水平上升和手足疼痛症状加重。结论酶替代治疗可有效改善法布雷病患儿临床症状并显著降低脱乙酰基三己糖酰基鞘酯醇水平。抗药抗体的出现在长期酶替代治疗中较常见并可能影响疗效, 需要临床关注和动态监测。

关键词：儿童抗体法布雷病酶治疗

Energy Budget over Seasonal Snow Surface at an Open Site and Beneath Forest Canopy Openness during the Snowmelt Period in Western Tianshan Mountains,China

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Journal of Mountain Science 2015年第2期12卷 298-312页

作者： lu.Heng WEI Wen-shou LIu Mingzhe HAN Xi HONG Wen Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences university of Chinese Academy of Sciences Institute of Desert Meteorology China Meteorological Administration Tianshan Station for Snow & Avalanche Research

In this study, meteorological factors and snowmelt rate at an open site on sunny slope(OPS) and beneath forest canopy openness on shady slope(BFC) were measured using an automatic weather station and snow lysimeter during the snowmelt period in 2009, 2010 and 2013. The energy budget over snow surface was calculated according to these meteorological datasets. The analysis results indicated that the net shortwave radiation(K) and sensible heat flu.(H) were energy sources, and the latent heat flu.(LVE) was energy sinks of snow surfaces at all sites. The net longwave radiation(L) was energy sink at OPS and 80% BFC, but energy source at 20% BFC. The gain of K, H, and the loss of LVE at BFC were obviously lower than those at OPS. The L was the maximum difference of energy budget between snow surface at BFC and OPS. In warm and wet years, the most important factor of the energy budget variation at OPS was air humidity and the second mostimportant factor was air temperature. However, the ground surface temperature on the sunny slope was the most important factor for L and energy budget at BFC. With the increases in forest canopy openness and the slope of adjacent terrains, the influ.nces of ground surface temperature on the sunny slope on L and the energy budget over snow surface at BFC increased, especially when the snow cover on the sunny slope melts completely.

关键词： Energy budget Seasonal snow Snowmelt period Tianshan Mountains

Dissipation-induced topological phase transition and periodic-driving-induced photonic topological state transfer in a small optomechanical lattice

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Frontiers of physics 2021年第1期16卷 157-167页

作者： lu.Qi Guo-Li Wang Shutian Liu shou Zhang Hong-Fu Wang School of Physics Harbin Institute of TechnologyHarbin 150001China Department of Physics College of ScienceYanbian UniversityYanji 133002China

We propose a scheme to investigate the topological phase transition and the topological state transfer based on the small optomechanical lattice under the realistic parameters *** find that the optomechanical lattice can be equivalent to a topologically nontrivial Su-Schrieffer Heeger(SSH)model via designing the effective optomechanical ***,the optomechanical lattice experiences the phase transition between topologically nontrivial SSH phase and topologically trivial SSH phase by controlling the decay of the cavity field and the opto mechanical *** stress that the to pological phase transition is mainly induced by the decay of the cavity field,which is counter-intuitive since the dissipation is usually detrimental to the ***,we investigate the photonic state transfer between the two cavity fields via the topologically protected edge channel based on the small optomechanical *** find that the quantum st ate transfer assisted by the topological zero energy mode can be achieved via implying the external lasers with the periodical driving amplitudes into the cavity *** scheme provides the fundamental and the insightful explanations towards the mapping of the photonic topological insulator based on the micro-nano optomechanical quantum optical platform.

关键词： to pological phase transition topological state transfer optomechanical lattice

Observations and Modeling of Incoming Longwave Radiation to Snow Beneath Forest Canopies in the West Tianshan Mountains, China

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Journal of Mountain Science 2014年第5期11卷 1138-1153页

作者： lu.Heng WEI Wen-shou LIu Ming-zhe HAN Xi HONG Wen Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences Institute of Desert Meteorology China Meteorological Administration Tianshan Station for Snow & Avalanche Research

Forest canopy reduces shortwave radiation and increases the incoming longwave radiation to snowpacks beneath forest canopies. Furthermore, the effect of forest canopy may be changed by complex topography. In this paper, we measured and simulated the incoming longwave radiation to snow beneath forest at different canopy openness in the west Tianshan Mountains, China(43°16'N, 84°24'E) during spring 2013. A sensitivity study was conducted to explore the way that terrain influ.nced the incoming longwave radiation to snow beneath forest canopies. In the simulation model, measurement datasets, inclu.ing air temperature, incoming shortwave radiation above canopy, and longwave radiation enhanced by adjacent terrain, were applied to calculate the incoming longwave radiation to snow beneath forest canopy. The simulation results were consistent with the measurements on hourly scale and daily scale. The effect of longwave radiation enhanced by terrain was important than that of shortwave radiation above forest canopy with different openness except the 20% canopy openness. The longwave radiation enhanced due to adjacent terrain increases with the slope increase and temperature rise. When air temperature(or slope) is relatively low, thelongwave radiation enhanced by adjacent terrain is not sensitive to slope(or air temperature), but the sensitivity increases with the decrease of snow cover area on sunny slope. The effect of longwave radiation is especially sensitive when the snow cover on sunny slope melts completely. The effect of incoming shortwave radiation reflected by adjacent terrain on incoming longwave radiation to snow beneath forest canopies is more slight than that of the enhanced longwave radiation.

关键词： Incoming longwave radiation Snow beneath forest canopy Simulation model Complex topography Sensitivity study

Zn/ ZrCl_4 System Induced Reductive Cleavage of Se-Se Bond in Diaryl Diselenides: A Novel Method for the Systhesis of Selenoesters

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Chinese Chemical Letters 2002年第1期13卷 9-12页

作者： Song Lin ZHANG Feng shou TIAN Gong An LI Yu lu.WANG College of Chemistry and Environmental Science Henan Normal University Xinxiang 453002

The Se-Se bond in diaryl diselenides was reduced by Zn/ZrCl4 system to produce selenide anions, which react with acyl chlorides or acid anhydrides to afford selenoesters in THF under mild and neutral conditions.

关键词： Diselenides zinc zirconium (IV) chloride selenoesters.

Influ.nce of formation in-situ stress on mechanical heterogeneity of shale through grid nanoindentation

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Petroleum Science 2022年第1期19卷 211-219页

作者： Mao Sheng Shi-Zhong Cheng Zhao-Hui lu.Ye Zhang shou-Ceng Tian Gen-Sheng Li College of Petroleum Engineering China University of Petroleum-Beijing102249PR China National and Local Joint Engineering Research Center of Shale Gas Exploration and Development Chongqing401120PR China

Mechanical heterogeneity is a major characteristic of the organic-rich *** relation between mechanical heterogeneity and formation in-situ stress has been seldomly addressed but important to understand hydraulic fracture propagation,wellbore stability,and hydrocarbon *** this paper,the grid nanoindentation technique was used to characterize the heterogeneity of the mechanical properties of Longmaxi organic-rich shales from various burial depths and in-situ *** measured elastic modulu. and hardness of each sample are deconvolved into three phases inclu.ing soft phase,medium stiff phase and stiff phase according to mineral *** the burial depth and corresponding in-situ stress increase,the overall elastic modulu. and hardness of the sample ***,the percentage of soft minerals decreases,and the probability distribution tends to concentrate through 95%confidence interval evalu.tion which demonstrates weakened ***,SEM images provide evidence that extended cracking,initiated cracking,crushing and ductile deforming always occur around indentation *** confirms that even under deep buried depth and high in-situ stress,brittle fracture and ductile deformation can exist *** paper demonstrates the influ.nce of in-situ stress on the heterogeneity of shale micromechanics.

关键词： Shale Heterogeneity Elastoplasticity Nanoindentation

Recognition of Organizational Morphology of Mesoscale Convective Systems using Himawari-8 Observations

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Journal of Tropical Meteorology 2024年第3期30卷 289-305页

作者： shou Yi-xuan ZHANG Su-zhao lu.Feng Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites National Satellite Meteorological Center(National Center for Space Weather)China Meteorological AdministrationBeijing 100081 China Innovation Center for FengYun Meteorological Satellite(FYSIC) Beijing 100081 China Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions Yinchuan 750002 China Ningxia Key Laboratory of Meteorological Disaster Prevention and Mitigation Yinchuan 750002 China

The onset,evolu.ion,and propagation processes of convective cells can be reflected by the organizational morphology of mesoscale convective systems(MCSs),which are key factors in determining the potential for heavy *** paper proposed a method for objectively classifying and segmenting MCSs using geosynchronous satellite *** of the product relative to the classification in radar composite reflectivity imagery indicates that the algorithm offers skill for discriminating between convective and stratiform areas and matched 65%of convective area identifications in radar imagery with a false alarm rate of 39%and an accuracy of 94%.A quantitative evalu.tion of the similarity between the structures of 50 MCSs randomly obtained from satellite and radar observations shows that the similarity was as high as 60%.For further testing,the organizational modes of the MCS that caused the heavy precipitation in Northwest China on August 21,2016(hereinafter known as the“0821”rainstorm)were *** was found that the MCS,accompanied by the“0821”rainstorm,successively exhibited modes of the isolated cell,squall line with parallel stratiform(PS)rain,and non-linear system during its life *** them,the PS mode might have played a key role in causing this *** findings are in line with previous studies.

关键词： mesoscale convective system satellite organizational morphology extremely heavy precipitation

Special modes induced by inter-chain coupling in a non-Hermitian ladder system

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Communications in Theoretical Physics 2020年第10期72卷 53-69页

作者： Rong Huang Yu Yan Zhi-Xu Zhang lu.Qi Hong-Fu Wang shou Zhang Department of Physics College of ScienceYanbian UniversityYanjiJilin 133002China School of Physics Harbin Institute of TechnologyHarbinHeilongjiang 150001China

We explore some interesting phenomena in a simple non-Hermitian ladder *** modes with energy eigenvalu.s closely related to the inter-chain-coupling strength appear in the non-Hermitian ladder *** show that a phase transition occurs whereby special modes with pure real eigenvalu.s can switch to special modes with pure imaginary eigenvalu.s,when the inter-chain-coupling strength changes from symmetric to *** find that the density profiles of all the special modes are completely identical under certain conditions,even if the inter-chain-coupling strength is added into the non-Hermitian ladder system in different ***,we also demonstrate that the different inter-chain couplings are fundamentally equivalent to adding different on-site potential energies into the non-Hermitian ladder system.

关键词： non-Hermitian ladder system special modes inter-chain-coupling