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Chinese Journal of Aeronautics 2023年第5期36卷 486-498页

作者： Yihang LIU deyuan ZHANG Daxi GENG Zhenyu SHAO Zehua ZHOU Zhefei SUN Yonggang JIANG Xinggang JIANG School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China Institute of Bionic and Micro-Nano Systems Beihang UniversityBeijing 100191China Aerospace Times Feihong Technology Company Limited Beijing 100094China

Imposing compressive residual stress field around a fastening hole serves as a universal method to enhance the hole fatigue strength in the aircraft assembly *** Peening Drilling(UPD)is a recently proposed hybrid hole making process,which can achieve an integration of strengthening and precision-machining with a one-shot-drilling *** to the ironing effect of tool flank surface,UPD introduces large compressive residual stress filed in hole *** order to reveal the strengthening mechanism of UPD,the influence of ultrasonic vibration and tool dynamic relief angle on ironing coverage rate and its corresponding effect on surface integrity in UPD were *** experiments were conducted to verify the influence of ironing effect on surface integrity and fatigue behavior of Ti-6Al-4V hole in *** results indicate that the specimen features smaller surface roughness,higher micro-hardness,plastic deformation degree and circumferential compress residual stress under higher ironing coverage *** fatigue life increases with the raise of ironing coverage rate,and the fatigue source site in UPD shifts from surface to subsurface comparing with that without vibration *** results demonstrates that a better strengthening effect can be obtained by reasonably controlling the ironing coverage rate in UPD.

关键词： Fatigue strength Surface integrity Titanium alloy Tool relief angle Ultrasonic Peening Drilling(UPD)

The Impact of Global Warming on Russia's Ecological Environment

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Social Sciences in China 2021年第4期42卷 194-208页

作者： Li Shuhua Huang deyuan Center for Russian Language Literature and Culture Studies Heilongjiang University 不详

The Russian ecosystem is a complex consisting of the Arctic marine ecosystem,the tundra,forest,steppe,mountain and island ecosystems,as well as the terrestrial and water ecosystems,the spatial ecosystem,the atmospheric ecosystem,the soil ecosystem,*** than being independent,these ecosystems are *** warming,so destructive to the global ecosystem,particularly affects Russia due to the country’s unique geographical *** is a double-edged sword for the Russian ecosystem;it does have some beneficial effects,but on the whole,its negative consequences outweigh the *** negative effects are the decrease in the Arctic sea ice,the increase in carbon emissions,the lessening of biodiversity,an increase in forest pests and diseases,the spread of contagious diseases,the frequency of forest fires,changes in the habitat conditions of biological species,and environmental *** recent years,coping with these negative effects has become a major challenge for Russia’s sustainable ***,Russia is actively participating in international cooperation to deal with global warming and is optimizing the relevant domestic *** ensure the stable and balanced development of society and the economy,Russia has been striving to reduce Russian greenhouse gas emissions by 30 percent by 2030 compared to 1990,in order to further improve the country’s ecosystems.

关键词： forest ecosystems Ecological

Microfabrication of functional polyimide films and microstructures for flexible MEMS applications

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Microsystems & Nanoengineering 2023年第2期9卷 1-22页

作者： Zihao Dong Qipei He Dawei Shen Zheng Gong deyuan Zhang Wenqiang Zhang Takahito Ono Yonggang Jiang Institute of Bionic and Micronano Systems School of Mechanical Engineering and AutomationBeihang UniversityBeijing 100191China College of Engineering China Agricultural UniversityBejing 100083China Graduate School of Engineering Tohoku University6-6-01 Aramaki-Aza-AobaAoba-kuSendai980-8579Japan

Polyimides are widely used in the MEMS and flexible electronics fields due to their combined physicochemical properties,including high thermal stability,mechanical strength,and chemical resistance *** the past decade,rapid progress has been made in the microfabrication of ***,enabling technologies,such as laser-induced graphene on polyimide,photosensitive polyimide micropatterning,and 3D polyimide microstructure assembly,have not been reviewed from the perspective of polyimide *** aims of this review are to systematically discuss polyimide microfabrication techniques,which cover flm formation,material conversion,micropatterning,3D microfabrication,and their *** an emphasis on polyimide-based flexible MEMS devices,we discuss the remaining technological challenges in polyimide fabrication and possible technological innovations in this field.

关键词： field polyimide fabrication

The Division of Labor in Parenting and Its Impact on Adolescent Development

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Social Sciences in China 2023年第4期44卷 175-198页

作者： Zhu Xiaowen Wang Kaili Guo Zhirong Huang deyuan School of Humanities and Social Sciences Xi'an Jiaotong University School of Social Development and Public Policy Fudan University 不详

The Law of the People's Republic of China on Family Education Promotion explicitly requires both parents to engage in their children's education, but so far there has not been sufficient empirical research on the division of labor in parenting in China. This study,based on questionnaire survey data, is an in-depth investigation of the current situation of the division of labor in parenting, differences in parental status in the family, and the influence of these factors on adolescent development in China. Our findings show that 1)The main pattern of the division of labor in parenting in China is one of intensive maternal parenting with no paternal educational input, followed by a pattern of low participation by both parents. The least common is a pattern of high participation by both parents. 2) The patterns of division of labor in parenting are significantly related to differences in parental status. A family in which the father is highly educated or has a higher level of education than the mother is more likely to evince the pattern of a high level of joint participation by both parents. 3) The division of labor in parenting does not significantly affect the academic performance of adolescents, but has a significant impact upon their mental health and noncognitive abilities. In terms of mental health, strong two-parent participation and intensive maternal parenting with no paternal input are more effective than a low level of participation by both parents. This indicates that a high level of participation by either parent improves children's mental health. In terms of non-cognitive abilities, we found that a high level of joint two-parent participation is more effective than either the pattern of intensive maternal parenting with no paternal educational participation or the pattern of low participation by both parents. The indicates that a father's active role in developing children's non-cognitive abilities cannot be replaced by the mother. 4) A father's contribu

关键词： family education division of labor in parenting fathering paternal participation adolescent development

Identification of a three-gene signature in the triple-negative breast cancer

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BIOCELL 2022年第3期46卷 595-606页

作者： LIPING WANG ZHOU LUO MINMIN SUN QIUYUE YUAN YINGGANG ZOU deyuan FU Clinical Medical College Yangzhou UniversityYangzhou225009China Institute of Epigenetics and Epigenomics College of Animal Science and TechnologyYangzhou UniversityYangzhou225009China Key Laboratory of Animal Genetics and Breeding Molecular Design of Jiangsu ProvinceYangzhou UniversityYangzhou225009China China Medical University Shenyang110122China Department of Obstetrics and Gynecology The Second Hospital of Jilin UniversityChangchun130021China

This work aimed to improve current prognostic signatures based on clinical stages in identifying high-risk patients of triple-negative breast cancer(TNBC),to allow patients with a high-risk score for specific treatment *** this study,396 TNBC samples from TCGA and GEO databases were included in genome-wide transcriptome *** relationship between normalized gene expression values and survival data of patients was determined by Cox proportional hazards models in each *** overlapped genes among all datasets were considered as a potential prognostic *** risk score was constructed based on individual genes and validated with three separate data sets and the combined ***,the Kaplan–Meier analysis including the log-rank test was performed to determine significantly statistical differences in overall *** association analysis between DNA methylation levels and gene expression levels of three genes was measured in the TCGA data *** Cox proportional hazards model analysis,the result showed that potential protective genes included 564 genes in GSE25066 dataset,1132 genes in GSE103091 dataset and 564 genes in TCGA dataset,potentially risky genes contained 1132 genes in GSE25066 dataset,475 genes in GSE25066 dataset and 1115 genes in TCGA *** all datasets,patients in high-risk groups showed worse prognosis than low-risk *** Cox regression analysis displayed that the 3-gene signature(DCAF4,UQCRFS1 and SS18)was an independent prognostic factor in *** AUC values of the 3-gene signature were 0.71,0.73 and 0.77 in GSE25066,GSE103091 and TCGA dataset,*** model,which combined the 3-gene signature(DCAF4,UQCRFS1 and SS18)with the tumor stage(pathological stage or pathological T stage),showed a stronger prognostic power for survival *** 3-genes prognostic signature may be a useful biomarker for survival prediction in TNBC patients and may contribute to patient classification in t

关键词： Triple-negative breast cancer Prognosis Biomarker

High-efficiency ultrasonic assisted drilling of CFRP/Ti stacks under non-separation type and dry conditions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第4期25卷 275-291页

作者： Enze YING Zehua ZHOU Daxi GENG Zhenyu SHAO Zhefei SUN Yihang LIU Lianxing LIU Xinggang JIANG deyuan ZHANG School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China Beijing Chenjing Electronics Company Limited Beijing 100015China Aerospace Times Feihong Technology Company Limited Beijing 100094China

In this study,to address the low efficiency for conventional ultrasonic-assisted drlling(UAD)of carbon fiber-reinforced plastic and titanium alloy(CFRP/Ti)stacks,feasibility experiments of non-separation UAD,in which continuous cutting between the tool and the workpiece occurs at a high feed rate,are carried *** experimental results indicate that,compared to conventional separation UAD,the non-separation UAD effectively reduces the cutting forces by 24.2%and 1.9%for CFRP stage and 22.1%and 2.6%for the Ti stage at the feed rates of 50 and 70μm/r,***,the non-separation UAD significantly improves hole quality,including higher hole diameter accuracy,lower hole surface roughness,and less hole *** addition,the non-separation UAD can decrease adhesive tool *** study demonstrates that,compared to conventional drilling(CD),the non-separation UAD can effectively improve drilling quality and tool life while maintaining high efficiency.

关键词： Carbon fiber-reinforced plastic and titanium alloy(CFRP/Ti)stacks Ultrasonic-assisted drlling(UAD) Cutting force Surface integrity Tool wear

Enhanced flow sensing with interfacial microstructures

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Biosurface and Biotribology 2020年第1期6卷 12-19页

作者： Yonggang Jiang Peng Zhao Zhiqiang Ma Dawei Shen Gongchao Liu deyuan Zhang Institute of Bionic and Micro-Nano Systems School of Mechanical Engineering and AutomationBeihang UniversityBeijing 100191People’s Republic of China International Research Institute of Multidisciplinary Science Beihang UniversityBeijing 100191People’s Republic of China

Biological flow receptors show astonishing performance and are used as models for the design of novel flow ***,the functional importance of interfacial microstructures is seldom discussed in previous review ***,this review summarises the underlying biomechanical principles in the biological flow receptors and describes the recent progress in bio-inspired flow sensors,in which the underlying sensing-enhancement mechanisms are emphasised.

关键词： flow interfacial seldom

Reactive ion etching of poly(vinylidene fluoride-trifluoroethylene) copolymer for flexible piezoelectric devices

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Chinese Science Bulletin 2013年第18期58卷 2091-2094页

作者： JIANG YongGang SHIONO Syohei HAMADA Hiroyuki FUJITA Takayuki ZHANG deyuan MAENAKA Kazusuke School of Mechanical Engineering and Automation Beihang University Graduate School of Engineering University of Hyogo Maenaka Human-Sensing Fusion Project ERATOJapan Science and Technology Agency

A microfabrication process for poly(vinylidene fluoride-trifluoroethylene)(P(VDF-TrFE)) based flexible piezoelectric devices is proposed using heat controlled spin coating and reactive ion etching(RIE) *** etching of P(VDF-TrFE) in CF 4 +O2 plasma is found to be more effective than that using SF 6 +O2 or Ar+O2 feed gas with the same radiofrequency power and pressure conditions.A maximum etching rate of 400 nm/min is obtained using the CF 4 +O2 plasma with an oxygen concentration of 60% at an antenna power of 200 W and a platen power of 20 *** oxygen atoms and fluorine atoms are found to be responsible for the chemical etching *** of P(VDF-TrFE) with a feature size of 10 m is achieved and the patterned films show a high remanent polarization of 63.6mC/m 2.

关键词：反应离子蚀刻压电器件三氟乙烯 P(VDF-TrFE) 偏氟乙烯反应性共聚物 SF6气体

Impact of hot alkali modification conditions on secondary structure of peanut protein and embedding rate of curcumin

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Food Science and Human Wellness 2019年第3期8卷 283-291页

作者： Wei Li Shugang Li Yong Hu mengzhou Zhou Chao Wang Dongsheng Li deyuan Li Hubei University of Technology Wuhan430068China Hubei Cooperative Innovation Center for Industrial Fermentation Wuhan430068China Function Food Engineering Center of Hubei province Hubei University of Chinese MedicineWuhan430068China

This study aimed to modify isolated and extracted peanut protein with hot alkali to study the impact of pH,heating temperature,processing time and other alkali liquor conditions on the molecular structure of the *** w... 详细信息

关键词： Curcumin Embedding rate Hot alkali modification Peanut protein Secondary structure