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| 1 | Structural optimization of uniaxial symmetry non-circular bolt clearance hole on turbine disk显示文摘This study proposes a parameterized model of a uniaxial symmetry non-circular hole, to improve conventional circular bolt clearance holes on turbine disks. The profile of the model consists of eight smoothly connected arcs, the radiuses of which are determined by 5 design variables.By changing the design variables, the profile of the non-circular hole can be transformed to accommodate different load ratios, thereby improving the stress concentration of the area near the hole and that of the turbine disk. The uniaxial symmetry non-circular hole is optimized based on finite element method(FEM), in which the maximum first principal stress is taken as the objective function. After optimization, the stress concentration is evidently relieved; the maximum first principal stress and the maximum von Mises stress on the critical area are reduced by 30.39% and 25.34%respectively, showing that the uniaxial symmetry non-circular hole is capable of reducing the stress level of bolt clearance holes on the turbine disk. | Chen Qiuren Guo Haiding Zhang Chao Liu Xiaogang | 2014 | Chinese Journal of Aeronautics2014，27，5： | 7 |
| 2 | A nomogram for individualized estimation of survival among adult patients with adrenocortical carcinoma after surgery:a retrospective analysis and multicenter validation study显示文摘Background:Clinical outcome of adrenocortical carcinoma(ACC)varies because of its heterogeneous nature and reliable prognostic prediction model for adult ACC patients is limited.The objective of this study was to develop and externally validate a nomogram for overall survival(OS)prediction in adult patients with ACC after surgery.Methods:Based on the data from the Surveillance Epidemiology,and End Results(SEER)database,adults patients diagnosed with ACC between January 1988 and December 2015 were identified and classified into a training set,comprised of 404 patients diagnosed between January 2007 and December 2015,and an internal validation set,com-prised of 318 patients diagnosed between January 1988 and December 2006.The endpoint of this study was OS.The nomogram was developed using a multivariate Cox proportional hazards regression algorithm in the training set and its performance was evaluated in terms of its discriminative ability,calibration,and clinical usefulness.The nomogram was then validated using the internal SEER validation,also externally validated using the Cancer Genome Atlas set(TCGA,82 patients diagnosed between 1998 and 2012)and a Chinese multicenter cohort dataset(82 patients diag-nosed between December 2002 and May 2018),respectively.Results:Age at diagnosis,T stage,N stage,and M stage were identified as independent predictors for OS.A nomo-gram incorporating these four predictors was constructed using the training set and demonstrated good calibration and discrimination(C-index 95%confidence interval[CI],0.715[0.679-0.751]),which was validated in the internal validation set(C-index[95%CI],0.672[0.637-0.707]),the TCGA set(C-index[95%CI],0.810[0.732-0.888])and the Chi-nese multicenter set(C-index[95%CI],0.726[0.633-0.819]),respectively.Encouragingly,the nomogram was able to successfully distinguished patients with a high-risk of mortality in all enrolled patients and in the subgroup analyses.Decision curve analysis indicated that the nomogram was clinically useful and applicable.Conclusions:The study presents a nomogram that incorporates clinicopathological predictors,which can accurately predict the OS of adult ACC patients after surgery.This model and the corresponding risk classification system have the potential to guide therapy decisions after surgery. | Jianqiu Kong Junjiong Zheng Jinhua Cai Shaoxu Wu Xiayao Diao Weibin Xie Xiong Chen Chenyi Liao Hao Yu Xinxiang Fan Chaowen Huang Zhuowei Liu Wei Chen Qiang Lv Haide Qin Jian Huang Tianxin Lin | 2019 | Cancer Communications2019，39，1： | 3 |
| 3 | Rolling texture development in a dual-phase Mg-Li alloy:The role of temperature显示文摘Dual-phase Mg-Li alloys sheets were rolled at four different temperatures ranging from liquid nitrogen to 300℃to explore effect of rolling temperature on texture and mechanical properties of the material.Crystal plasticity simulation was utilized to illustrate the influence of slip activity on rolling texture development.The results show that the rolling texture is largely depended on deformation temperature.Unlike commercial Mg alloys,the critical resolved shear stress of basal slip inα-Mg phase of Mg-Li alloy decreased more significantly by increasing temperature compared to that of pyramidalslip.Enhancement of basal slip by increasing temperature triggered a decrease of split angle of basal poles for the double-peak texture.Prismaticslip largely enhanced by increasing temperature upon 200℃,which induced a wider orientation spread along the transverse direction.For theβ-Li phase,the promotion of{110}<111>slip system at elevated temperature triggered the enhancement of{211}<110>and{111}<211>texture components.The cryo-rolled sample exhibited the highest strength compared to the others due to a strong hardening behavior at this temperature.A two-stage hardening behavior was observed in these as-rolled dual-phase alloys.Strain transition at phase boundaries could be the reason for appearance of this two-stage hardening. | Xiaoyan Li Fei Guo Yanlong Ma Luyao Jiang Hongliang Lai Haiding Liu Dingfei Zhang Risheng Pei | 2023 | Journal of Magnesium and Alloys2023，11，8： | 2 |
| 4 | Origin of the hydrate bound gases in the Juhugeng Sag, Muli Basin, Tibetan Plateau显示文摘The Juhugeng Sag,located in northwest of the Muli Basin,Tibetan Plateau,has been investigated for coal and petroleum resources during the past several decades.There have been successful recoveries of gas hydrates during recent years from the Middle Jurassic Yaojie Formation that offer insight into the origin of the hydrocarbon gases from the complex sag feature.This study examines the organic geochemical and stable carbon isotopic characteristics of shale and coal samples from the Middle Jurassic Yaojie Formation of the Juhugeng Sag,as well as compares with carbon isotopes,gas amounts and components of hydrate-bound gas.A total of 19 samples from surface mining,including 12 samples of black shale and 7 samples of coal,were analysed using a micro-photometer,a gas chromatograph,Rock–Eval and isotope methods.All the shale samples contained 100%type I kerogen,and the random vitrinite reflectance values vary from 0.65%to 1.32%and achieve thermal pyrolysis phase.Isotope values of methane(δ13C ranging from−52.6‰to−39.5‰andδD ranging from−285‰to−227‰)in the hydrate bound gases suggest that the methane originates mainly from thermogenic contributions.It is proposed that ethane from the gas hydrate is thermogenic-produced,and this conjecture is supported by the fact that most of the gas hydrate also contains more than 30%of thermogenic C2+hydrocarbons and is similar to structure II hydrate.Carbon isotope data from the gas hydrates show a positive carbon isotope series(δ13C1<δ13C2<δ13C3),with ethaneδ13C values being lighter than−28.5‰,as high consistency with source rocks from the Jurassic period indicate thermal oil-prone gas.A model of the accumulation of gas hydrate is plotted.However,the gaseous sources of gas hydrates may be a subject for more research. | Shiming Liu Furong Tan Ting Huo Shuheng Tang Weixiao Zhao Haide Chao | 2020 | International Journal of Coal Science & Technology2020，7，1： | 0 |
| 5 | Fe-based catalysts for nitrogen reduction toward ammonia electrosynthesis under ambient conditions显示文摘As one of the most important chemicals and carbon-free energy carriers,ammonia(NH3)has significant energy-related applications in industry and agriculture.Ninety percent of NH_(3) is produced by the Haber-Bosch process using high-purity N_(2) and H_(2) at high temperatures and pressures,which consumes about 1%of the total energy production and causes 1.4% of global CO_(2) emissions.The environmentally friendly electrochemical nitrogen reduction reaction(NRR)with low energy consumption is a promising alternative to the conventional Haber-Bosch process.However,the main issue is the low Faradaic efficiency and NH3 selectivity of electrochemical NRR,caused by inert nitrogen molecules and competitive hydrogen evolution reaction.As one of the cheapest and most abundant transition metals widely utilized in the Haber-Bosch process,the Fe element has presented the potential high performance for the electrochemical NRR.This article summarizes recent advances and research progress in non-noble Fe-based catalysts used for NH_(3) electrosynthesis.Various synthetic protocols,structure/morphology modification,performance improvement,and reaction mechanisms are comprehensively presented.Based on recent experimental and theoretical studies,we aim to illuminate the structure-property relationship and offer an excellent opportunity for engineering advanced Fe-based catalysts for nitrogen fixation.The most critical challenges and opportunities for Fe-based catalysts are also provided.This review would open up a promising avenue toward developing platinum-group-metal-free catalysts for electrochemical NRR applications in the future. | Haiding Zhu Xuefeng Ren Xiaoxuan Yang Xingyou Liang Anmin Liu Gang Wu | 2022 | SusMat2022，2，3： | 0 |
| 6 | Research progress of electrocatalysts for the preparation of H_(2)O_(2)by electrocatalytic oxygen reduction reaction显示文摘As an eco-friendly oxidant and energy carrier,H_(2)O_(2)is used in various fields.The industrial production of H_(2)O_(2)mostly depends on the large-scale anthraquinone oxidation processes with high costs.Electrocatalytic production of H_(2)O_(2)has attracted attention as a renewable and cost-effective approach to replace traditional ones.With the recent development of oxygen reduction reaction(ORR)catalysts,remarkable progress in electrocatalysts for electrocatalytic H_(2)O_(2)production by 2e−ORR has been reported.This review summarizes a detailed overview of the recent progress in 2e−ORR for H_(2)O_(2)production with the mechanism and various efficient catalysts.The catalysts were divided into three parts:noble metal-based catalyst,non-noble metal-based catalyst,and non-metalbased catalyst.The influences of the catalytic activity and selectivity were also discussed.Finally,this review explores the prospects of electrocatalytic 2e−ORR for H_(2)O_(2)synthesis and potential research directions for electrocatalysts.It aims to offer guidance in designing efficient 2e−ORR electrocatalysts and inspire further innovation in electrocatalytic H_(2)O_(2)synthesis. | Xuefeng Ren Xiaoman Dong Lifen Liu Jian Hao Haiding Zhu Anmin Liu Gang Wu | 2023 | SusMat2023，3，4： | 0 |
| 7 | Observation of polarity-switchable photoconductivity in lInitride/MoS_(x)core-shell nanowires显示文摘Ⅱ-Ⅴsemiconductor nanowires are indispensable building blocks for nanoscale electronic and optoelectronic devices.However,solely relying on their intrinsic physical and material properties sometimes limits device functionalities to meet the increasing demands in versatile and complex electronic world.By leveraging the distinctive nature of the one-dimensional geometry and large surface-to-volume ratio of the nanowires,new properties can be attained through monolithic integration of conventional nanowires with other easy-synthesized functional materials.Herein,we combine high-crystal-quality lInitridle nanowires with amorphous molybdenum sulfides(a-MoS)to construct II.nitride/a-MoS_(x) core-shell nanostructures.Upon light ilumination,such nanostructures exhibit striking spectrally distinctive photodetection characteristic in photoelectrochemical environment,demonstrating a negative photoresponsivity of-100.42 mA W^(-1)under 254 nm ilumination,and a positive photoresponsivity of 29.5 mA W^(-1)under 365 nm ilumination.Density functional theory calculations reveal that the successful surface modifcation of the nanowires via a-MoS_(x)decoration accelerates the reaction process at the electrolyte/nanowire interface,leading to the generation of opposite photocurrent signals under different photon ilumination.Most importantly,such polarity-switchable photoconductivity can be further tuned for multiple wavelength bands photodetection by simply adjusting the surrounding environment and/or tailoring the nanowire composition,showing great promise to build light-wavelength controllable sensing devices in the future. | Danhao Wang Wentiao Wu Shi Fang Yang Kang Xiaoning Wang Wei Hu Huabin Yu Haochen Zhang Xin Lu Yuanmin Luo Jr-Hau He Lan Fu Shibing Long Sheng Liu Haiding Sun | 2022 | Light(Science & Applications)2022，11，11： | 0 |
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