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Rare Metals 2022年第11期41卷 3878-3886页

作者： Chun Jian Su Ting Ting Xu Ke Zhang Ke Zhang shu mei lou Qing Wang College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao266590China

The research of forming parameters on the ultrasonic vibration single-point incremental forming of magnesium alloy plastic deformation can provide a theoretical basis for the establishment of the forming *** to the forming characteristics of magnesium alloy sheet,a new method of ultrasonic vibration-as sis ted single-point incremental forming was *** influence of forming parameters on the plastic deformation of magnesium alloy was studied by finite element simulation and *** influence of vibration frequency,amplitude,friction coefficient,and tool head size on stress and thinning rate of magnesium alloy during ultrasonic vibration-as sis ted single-point asymptotic forming was *** results show that the vibration frequency of 20 kHz and forming tool radius of about 5 mm are beneficial for plastic deformation magnesium alloy in ultrasonic vibration-assisted single-point incremental *** vibration amplitude increasing,the maximum shear stress tends to decrease as a whole,but at the amplitude of 0.16 mm,the thinning rate is large and fracture occurs *** friction coefficient increasing,the maximum shear stress tends to increase,and there is a good linear relationship between the maximum thinning rate and the friction coefficient.

关键词： Magnesium alloy Ultrasonic vibration Incremental forming Forming parameters Plastic deformation

Differences and identification on multi-time hydrocarbon generation of carboniferous-permian coaly source rocks in the Huanghua Depression,Bohai Bay Basin

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Petroleum Science 2024年第2期21卷 765-776页

作者： Jin-Jun Xu Xian-Gang Cheng shu-Nan Peng Jun-Cai Jiang Qi-Long Wu Da lou Fu-Qi Cheng La-mei Lin National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580ShandongChina PetroChina Dagang Oilfield Company Tianjin300280China

Coal is a solid combustible mineral,and coal-bearing strata have important hydrocarbon generation potential and contribute to more than 12%of the global hydrocarbon ***,the deposition and hydrocarbon evolution process of ancient coal-bearing strata is characterized by multiple geological times,leading to obvious distinctions in their hydrocarbon generation potential,geological processes,and production,which affect the evaluation and exploration of hydrocarbon resources derived from coaly source rocks *** study aimed to identify the differences on oil-generated parent macerals and the production of oil generated from different coaly source rocks and through different oil generation *** with the analysis of previous tectonic burial history and hydrocarbon generation history,high-temperature and high-pressure thermal simulation experiments,organic geochemistry,and organic petrology were performed on the Carboniferous-Permian(C-P)coaly source rocks in the Huanghua Depression,Bohai Bay *** oil-generated parent macerals of coal's secondary oil generation process(SOGP)were mainly hydrogen-rich collotelinite,collodetrinite,sporinite,and cutinite,while the oil-generated parent macerals of tertiary oil generation process(TOGP)were the remaining small amount of hydrogen-rich collotelinite,sporinite,and cutinite,as well as dispersed soluble organic matter and unexhausted residual *** with coal,the oil-generated parent macerals of coaly shale SOGP were mostly sporinite and *** part of hydrogen-poor vitrinite,lacking hydrocarbon-rich macerals,and macerals of the TOGP,in addition to some remaining cutinite and a small amount of crude oil and bitumen from SOGP contributed to the oil *** results indicated that the changes in oil yield had a good junction between SOGP and TOGP,both coal and coaly shale had higher SOGP aborted oil yield than TOGP starting yield,and coaly shale TOGP peak oil yield was low

关键词： Thermal simulation Multi-time oil generation processes Coaly source rock Carboniferous-permian Huanghua Depression

Magnetic resonance imaging-based lymph node radiomics for predicting the metastasis of evaluable lymph nodes in rectal cancer

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 1849-1860页

作者： Yong-Xia Ye Liu Yang Zheng Kang mei-Qin Wang Xiao-Dong Xie Ke-Xin lou Jun Bao mei Du Zhe-Xuan Li Department of Radiology The Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Cancer Hospital&Jiangsu Institute of Cancer ResearchNanjing 210011Jiangsu ProvinceChina Department of Colorectal Surgery Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research and The Affiliated Cancer Hospital of Nanjing Medical UniversityNanjing 210000Jiangsu ProvinceChina1 Department of Pathology The Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Cancer Hospital&Jiangsu Institute of Cancer ResearchNanjing 210011Jiangsu ProvinceChina Colorectal Center The Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Cancer Hospital&Jiangsu Institute of Cancer ResearchNanjing 210011Jiangsu ProvinceChina

BACKGROUND Lymph node(LN)staging in rectal cancer(RC)affects treatment decisions and patient *** radiologists,the traditional preoperative assessment of LN metastasis(LNM)using magnetic resonance imaging(MRI)poses a *** To explore the value of a nomogram model that combines Conventional MRI and radiomics features from the LNs of RC in assessing the preoperative metastasis of evaluable *** In this retrospective study,270 LNs(158 nonmetastatic,112 metastatic)were randomly split into training(n=189)and validation sets(n=81).LNs were classified based on pathology-MRI *** MRI features[size,shape,margin,T2-weighted imaging(T2WI)appearance,and CE-T1-weighted imaging(T1WI)enhancement]were *** radiomics models used 3D features from T1WI and T2WI ***,a nomogram model combining conventional MRI and radiomics features was *** model used univariate analysis and multivariable logistic *** employed the receiver operating characteristic curve,with DeLong test for comparing diagnostic *** performance was assessed using calibration and decision curve *** The nomogram model outperformed conventional MRI and single radiomics models in evaluating *** the training set,the nomogram model achieved an area under the curve(AUC)of 0.92,which was significantly higher than the AUCs of 0.82(P<0.001)and 0.89(P<0.001)of the conventional MRI and radiomics models,*** the validation set,the nomogram model achieved an AUC of 0.91,significantly surpassing 0.80(P<0.001)and 0.86(P<0.001),*** The nomogram model showed the best performance in predicting metastasis of evaluable LNs.

关键词： Radiomics Lymph node metastasis Rectal cancer Magnetic resonance imaging

Resonant four-photon photoemission from SnSe_(2)(001)

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Frontiers of physics 2024年第3期19卷 83-92页

作者： Chengxiang Jiao Kai Huang Hongli Guo Xingxia Cui Qing Yuan Cancan lou Guangqiang mei Chunlong Wu Nan Xu Limin Cao Min Feng School of Physics and Technology and Key Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education Wuhan UniversityWuhan 430072China Department of Physics and Astronomy California State University NorthridgeNorthridgeCA 91330-8268USA Institute for Advanced Study Wuhan UniversityWuhan 430072China

High-order nonlinear multiphoton absorption is usually inefficient,but can be enhanced by designing resonant excitations between occupied and unoccupied energy *** conducted angle-resolved multi-photon photoemission(mPPE)studies on the SnSe_(2)(001)surfaces excited by ultrashort laser *** tuning photon energy and light polarization,we demonstrate the presence of a resonant four-photon photoemission(4PPE)process involving the occupied valence band(VB),the unoccupied second conduction band(CB2)and the unoccupied image-potential state(IPs)of SnSe_(2).In this 4PPE process,VB electrons of SnSe_(2) are resonantly excited into CB2 by adsorbing two photons,followed by the adsorption of another photon to populate the n=1 IPs before being emitted out to the vacuum by adsorbing one more *** results in a double-resonant 4PPE process,which exhibits approximately a 40 times enhancement in photoemission yields compared to cases where one of the resonant pathways,CB2→IPs,is inhibited by involving a virtual state instead of the IPs in the *** double-resonant 4PPE process efficiently excite the bulk VB electrons outside the vacuum,like taking advantage of resonant“ladders”through two real empty electronic states of SnSe_(2).Our results highlight the important applications of mPPE in probing the band-structure,particularly the unoccupied states,of recently emerging main group dichalcogenide ***,the discovered resonant mPPE process contributes to the exploration of their promising optoelectronic applications.

关键词： multi-photon photoemission four-photon photoemission SnSe_(2) unoccupied states resonant excitation

中国式现代化视域下畜禽养殖业规模化发展的路径研究

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饲料研究 2024年第11期47卷 189-192页

作者：娄银梅天津职业大学马克思主义学院天津300410

畜禽养殖业规模化发展是推动畜牧经济高质量发展的核心所在,也是实现中国式现代化目标的重要基础。文章从健全畜禽养殖发展格局、畜禽养殖政策持续出台方面阐述了全国畜禽养殖业规模化发展机遇。立足中国式现代化,畜禽养殖业规模化发展... 详细信息

畜禽养殖业规模化发展是推动畜牧经济高质量发展的核心所在,也是实现中国式现代化目标的重要基础。文章从健全畜禽养殖发展格局、畜禽养殖政策持续出台方面阐述了全国畜禽养殖业规模化发展机遇。立足中国式现代化,畜禽养殖业规模化发展能够推动畜牧业高质量转型,打造畜禽养殖现代化生态,增强畜禽养殖市场经济稳定性。在此基础上,文章提出完善畜禽养殖业规模化发展机制、建立畜禽养殖现代化发展模式、全面挖掘现代化畜禽养殖资源的创新路径,为推动中国式现代化发展提供助力。

关键词：中国式现代化畜禽养殖业规模化发展供应链体系创新模式

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基于BP神经网络和Arrhenius本构模型的石墨烯/7075复合材料热变形行为

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吉林大学学报（工学版） 2024年第5期54卷 1237-1245页

作者：娄淑梅李一明李鑫陈鹏白雪峰程宝嘉山东科技大学智能装备学院山东泰安271019

在653~713 K温度范围和0.01~10 s^(-1)应变速率下,进行了w(GNP/7075Al)=0.5%增强7075铝基复合材料的热压缩试验,建立了BP神经网络和应变补偿Arrhenius模型,同时建立了复合材料的热加工图和动态再结晶体积分数预测模型,研究了复合材料的... 详细信息

在653~713 K温度范围和0.01~10 s^(-1)应变速率下,进行了w(GNP/7075Al)=0.5%增强7075铝基复合材料的热压缩试验,建立了BP神经网络和应变补偿Arrhenius模型,同时建立了复合材料的热加工图和动态再结晶体积分数预测模型,研究了复合材料的热变形行为,并确定了复合材料的热加工工艺参数。结果表明:BP神经网络模型得到的流变应力预测值与试验结果吻合较好,其相关系数最高为99.9983%,平均相对误差绝对值最小为0.5%,表明神经网络对w(GNP/7075Al)=0.5%复合材料的热变形行为具有较高的预测精度。w(GNP/7075Al)=0.5%复合材料最佳变形温度和应变速率分别为685~705 K和0.01~0.1 s~(-1)。动态再结晶(DRX)倾向于在低应变速率和高变形温度下发生。数值模拟和热挤压试验表明,在挤压温度693 K、挤压速度1 mm/min的工艺参数下可以挤出表面质量良好的型材。

关键词：材料加工工程石墨烯/铝复合材料热变形本构方程热加工图再结晶模型数值模拟

Epidemiological and clinical features,treatment status,and economic burden of traumatic spinal cord injury in China:a hospital-based retrospective study

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Neural Regeneration Research 2024年第5期19卷 1126-1132页

作者： Hengxing Zhou Yongfu lou Lingxiao Chen Yi Kang Lu Liu Zhiwei Cai David BAnderson Wei Wang Chi Zhang Jinghua Wang Guangzhi Ning Yanzheng Gao Baorong He Wenyuan Ding Yisheng Wang Wei mei Yueming Song Yue Zhou Maosheng Xia Huan Wang Jie Zhao Guoyong Yin Tao Zhang Feng Jing Rusen Zhu Bin Meng Li Duan Zhongmin Zhang Desheng Wu Zhengdong Cai Lin Huang Zhanhai Yin Kainan Li Shibao Lu Shiqing Feng Department of Orthopedics The Second HospitalCheeloo College of MedicineShandong UniversityShandongChina Department of Orthopedics Shandong University Center for OrthopedicsQilu HospitalCheeloo College of MedicineShandong UniversityShandongChina Department of Orthopedics Tianjin Medical University General HospitalInternational Science and Technology Cooperation Base of Spinal Cord InjuryTianjin Key Laboratory of Spine and Spinal CordTianjinChina Faculty of Medicine and Health The Back Pain Research TeamSydney Musculoskeletal HealthThe Kolling InstituteUniversity of SydneySydneyNSWAustralia Department of Spine Surgery Honghui HospitalXi’an Jiaotong UniversityXi’anShaanxi ProvinceChina Department of Burns and Plastic Surgery The Fourth Medical Center of Chinese PLA General HospitalBeijingChina Faculty of Medicine and Health School of Health SciencesUniversity of SydneyNSWAustralia Sydney Spine Institute BurwoodSydneyNSWAustralia Laboratory of Epidemiology Tianjin Neurological InstituteDepartment of NeurologyTianjin Medical University General Hospital&Tianjin Neurological InstituteKey Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous SystemMinistry of Education and Tianjin CityTianjinChina Department of Orthopedics Henan Provincial People’s HospitalZhengzhouHenan ProvinceChina Department of Spinal Surgery The Third Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Department of Orthopedics The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina Department of Spine Surgery Zhengzhou Orthopedics HospitalZhengzhouHenan ProvinceChina Department of Orthopedic Surgery and Orthopedic Research Institute West China HospitalSichuan UniversityChengduSichuan ProvinceChina Department of Orthopedics Xinqiao HospitalArmy Medical UniversityChongqingChina Department of Orthopedics The First Affiliated Hospital of China Medical UniversityShenyangLiaoning ProvinceChina Department of Spinal Surgery Shengj

Traumatic spinal cord injury is potentially catastrophic and can lead to permanent disability or even *** has the largest population of patients with traumatic spinal cord *** studies of traumatic spinal cord injury in China have mostly been regional in scope;national-level studies have been *** the best of our knowledge,no national-level study of treatment status and economic burden has been *** retrospective study aimed to examine the epidemiological and clinical features,treatment status,and economic burden of traumatic spinal cord injury in China at the national *** included 13,465 traumatic spinal cord injury patients who were injured between January 2013 and December 2018 and treated in 30 hospitals in 11 provinces/municipalities representing all geographical divisions of *** epidemiological and clinical features,treatment status,and total and daily costs were *** in the percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department and cost of care were assessed by annual percentage change using the Joinpoint Regression *** percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department did not significantly change overall(annual percentage change,-0.5%and 2.1%,respectively).A total of 10,053(74.7%)patients underwent *** 2.8%of patients who underwent surgery did so within 24 hours of injury.A total of 2005(14.9%)patients were treated with high-dose(≥500 mg)methylprednisolone sodium succinate/methylprednisolone(MPSS/MP);615(4.6%)received it within 8 *** total cost for acute traumatic spinal cord injury decreased over the study period(-4.7%),while daily cost did not significantly change(1.0%increase).Our findings indicate that public health initiatives should aim at improving hospitals’ability to complete early surgery within 24 ho

关键词： China clinical features costs epidemiology methylprednisolone sodium succinate methylprednisolone retrospective study traumatic spinal cord injury treatment

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不同坡位及肥料类型对新桐1号引种的影响

陕西林业科技 2024年第4期52卷 25-28+33页

作者：娄义美刘畅文山州林业和草原种苗管理站

为探索不同坡位及肥料类型对新桐1号生长的影响，2022年从重庆市云阳县引进新桐1号苗木在云南省文山州西畴县兴街镇进行定植，通过设置不同坡位和不同肥料类型等9个不同组合对比试验，分别调查不同处理下新桐1号的生长情况。结果表明，... 详细信息

为探索不同坡位及肥料类型对新桐1号生长的影响，2022年从重庆市云阳县引进新桐1号苗木在云南省文山州西畴县兴街镇进行定植，通过设置不同坡位和不同肥料类型等9个不同组合对比试验，分别调查不同处理下新桐1号的生长情况。结果表明，种植在下坡，施用有机肥更有利于新桐1号树高和胸径的生长。

关键词：新桐1号坡位肥料类型影响

Mechanisms of root-soil reinforcement in bioembankments of sloping farmland in the purple hilly area,China

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Journal of Mountain Science 2019年第10期16卷 2285-2298页

作者： JIN Hui-fang SHI Dong-mei ZENG Xiao-ying WANG San-shu DUAN Teng lou Yi-bao College of Resources and Environment Institute of Soil and Water Conservation and Eco-environmentSouthwestUniversityChongqing400715China Chongqing Institute of Forest Science Chongqing400036China Chongqing Surveying and Design Institute of Water Resources Electric Power and ArchitectureChongqing400020China

Bio-embankment is an important soil and water conservation measure in the purple hilly area in China,which can effectively improve the ability of cultivated soil layers to resist rainfall erosion and runoff *** contrast,the ecological effect of bioembankment depends on the stability of the earth *** the natural grass bank as a control(CK),the root distribution,root tensile properties and shear resistance of root-soil composites for 3 typical soil and water conservation bio-embankments,namely,Morus alba Linn(Morns),Zanthoxylum bungeanum Maxim(Zanthoxylum)and Medicago sativa(Medicago)were *** results included the following:(1)The root system of the bio-embankments generally decreased in extent with the soil depth;fine roots in the o-io cm depth were most prevalent and significantly higher than those at the other depths,and coarse roots were mainly distributed in the o-30cm layer.(2)The stress-strain curves of the roots of each bio-embankment were single-peak curves without clear strain softening *** smaller the root diameters were,the smoother the stress-strain curves,and the lower the capability of the earth bank to resist *** larger the root diameters were,the lower the tensile *** average root tensile force was highest for Zanthoxylum(73.91 N),followed by Medicago(68.07N)and Morus(61.88 N),and the average root tensile strength showed the same trend,16.52 MPa for Zanthoxylum,16.08 MPa for Medicago and 13.02MPa for Morus.(3)The bio-embankment measures significantly improved the soil shear resistance,especially under vertical loads of 1oo kPa and *** soil internal friction angle showed a significant log-positive correlation with root morphological parameters of root length density(RLD),root surface area density(RSAD) and rootweight density(RWD),while the soil cohesion force showed a positive linear correlation with these *** results provide effective parameters supporting for the design of bio-embankm

关键词： Bio-embankments Root distribution Tensile properties Shear strength Earth bank collapse Purple hilly area

Increased Oxidative Stress and Damage in Patients With Chronic Bacterial Prostatitis

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Biomedical and Environmental Sciences 2006年第6期19卷 481-486页

作者： JIAN-GUO lou JIE DONG Yt-CHUN ZHENG shu-mei ZHANG WEJ-QIANG XIAO AND JUN-FU ZHOU Laboratory for Free Radical Medicine Medical College Second Hospital Zhejiang University Hangzhou 310009 Zhejiang China Department of Traditional Chinese Medicine Medical College Second Hospital Zhejiang University Hangzhou 310009 Zhejiang China Department of Urology Medical College Second Hospital Zhejiang University Hangzhou 310009 Zhejiang China

Objective To investigate whether chronic bacterial prostatitis （CBP） increases oxidative stress and damage in patients with CBP, and to explore its possible mechanism. Methods Eighty patients with CBP and 80 healthy adults as controls were enrolled in a case-control study, in which levels of nitric oxide （NO）, vitamin C （VC）, and vitamin E （VE） in plasma, as well as malondialdehyde （MDA）, activities of superoxide dismutase （SOD）, and eatalase （CAT） in erythrocytes were determined by spectrophotometry. Results Compared with the average values of NO, VC, VE, MDA, SOD, and CAT in the healthy control group, those of plasma N O and erythrocyte MDA in the CBP group were significantly increased （P〈0.00 1）, and those of plasma VC and VE as well as erythrocyte SOD and CAT in the CBP group were significantly decreased （P〈0.001）. Findings from partial correlation analysis for course of the disease and NO, VC, VE, MDA, SOD, and CAT in 80 patients with CBP, adjusted for age, suggested that with prolonged course of the disease, values of NO and MDA were gradually increased （P〈0.001）, and those of VC, VE, SOD, and CAT were gradually decreased （P〈0.05-0.001）. The findings from stepwise regression analysis for course of the disease and NO, VC, VE, MDA, SOD, and CAT in CBP group suggested that the model of stepwise regression was Y = -19.1160 ＋0.3112MDA ＋ 0.0337NO, F = 22.1734, P〈0.001, r = 0.6045, P〈0.001. The findings from the reliability analysis for VC, VE, SOD, CAT, NO, and MDA in the CBP group showed that the reliability coefficients＇ alpha （6 items） was 0.7195, P〈0.0001, and the standardized item alpha was 0.9307, P〈0.0001. Conclusion There exist increased oxidative stress and damage induced by chronic bacterial prostatitis in patients, and such a phenomenon is closely related to the course of disease.

关键词： Chronic bacterial prostatitis Oxidative stress Oxidative damage Free radicals Oxidation Lipid peroxidation Antioxidant Antioxidative enzyme Nitric oxide Malondialdehyde