检索结果-南通市图书馆

五邑大学学报（自然科学版） 2024年第3期38卷 73-78页

作者：杨艳秋曹佩雯五邑大学图书馆广东江门529020

本研究旨在探究高校图书馆采用“一日一书”激发大学生阅读兴趣的成效果与可行性.通过系统地收集、分析流通数据、调查问卷和“一日一书”阅读记录等数据,全面评估了“一日一书”活动对大学生阅读兴趣的促进作用.

关键词：高校图书馆一日一书阅读兴趣阅读推广

Empirical likelihood for first-order mixed integer-valued autoregressive model

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Applied Mathematics(A Journal of Chinese Universities) 2018年第3期33卷 313-322页

作者： yang yan-qiu WANG De-hui ZHAO Zhi-wen Department of Mathematics Jilin University Department of Mathematics Jilin Normal University

In this paper, we not only construct the confidence region for parameters in a mixed integer-valued autoregressive process using the empirical likelihood method, but also establish the empirical log-likelihood ratio statistic and obtain its limiting distribution. And then, via simulation studies we give coverage probabilities for the parameters of interest. The results show that the empirical likelihood method performs very well.

关键词： mixed integer-valued autoregressive model empirical likelihood asymptotic distribution confidence region

基于CIMISS地面资料在气象服务中的应用

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信息技术 2024年第2期48卷 59-65页

作者：宋萍杨秋彦国婷婷杨伟超高阳山东省气象服务中心济南250031 山东省气象防灾减灾重点实验室济南250031

文中详述了行业气象服务中,通过对接CIMISS(China Integrated Meteorological Information Service System)及云平台应用实现的数据服务和可视化服务流程。文中通过替换非公开国家站数据及观测要素不同范围的随机偏移保障了气象观测数... 详细信息

文中详述了行业气象服务中,通过对接CIMISS(China Integrated Meteorological Information Service System)及云平台应用实现的数据服务和可视化服务流程。文中通过替换非公开国家站数据及观测要素不同范围的随机偏移保障了气象观测数据的安全性;在对接CIMISS时,通过对不同类型的数据设计对应的补调流程,保证了服务数据和数据源的高度一致性;最后,在稳定统一的底层数据环境基础上,根据交通行业用户的需求,采用B/S模式设计实现了交通三要素展示系统,为行业用户提供了较好的数据和服务支持,切实提高了行业用户的决策效率。

关键词： CIMISS 数据脱敏数据补调可视化交通气象

Exceptional reversed yield strength asymmetry in a rare-earth free Mg alloy containing quasicrystal precipitates

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Journal of Magnesium and Alloys 2024年第2期12卷 687-699页

作者： Qiang yang Shuhui Lv Zixiang yan Zefeng Xie Xin qiu State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022PR China School of Materials Science and Engineering Changchun University of Science and Technology130022PR China

This work reports an exceptional reversed yield strength asymmetry at room temperature for a rare-earth free magnesium alloy containing a mass of fine dispersed quasicrystal(I-phase)*** exhibiting traditional basal texture,it owns an exceptional CYS/TYS as high as~*** back-scattered diffraction(EBSD)and transmission electron microscopy(TEM)examinations indicate pyramidal and prismatic dislocations plus tensile twinning being activated after immediate yielding in compression while basal and non-basal dislocations in tension.I-phase particles transferred the concentrated stress by self-twinning to provide the driving force for tensile twin initiating in neighboring grains,thereby significantly increasing the critical resolved shear stress of tensile twinning to possibly the level of pyramidal slip,finally leading to the dominance of pyramidal slip plus tensile twinning in texture *** results in a higher contribution on yield strength by~55 MPa in compression than in tension,which reasonably agrees with the experimental yield strength difference(~38 MPa).It can be concluded that I-phase particles influence deformation modes in tension and in compression,finally result in reversed yield strength asymmetry.

关键词： Magnesium alloy Reversed yield strength asymmetry Transmission electron microscopy(TEM) Twinning Dislocations

Understanding livelihood vulnerability:a perspective from Western Sichuan’s ethnic rural settings

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Journal of Mountain Science 2024年第2期21卷 380-396页

作者： YU Yongqian JING Zheng WANG yan qiu Xiaoping yang Xueting XU Yun School of Geography and Resource Science Sichuan Normal UniversityChengdu 610101China Key Laboratory of land Resources Evaluation and Monitoring in Southwest Ministry of EducationSichuan Normal UniversityChengdu 610101China Sichuan County Economic Development Research Center Mianyang Normal UniversityMianyang 621000China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China

To explore the livelihood status and key influencing factors of rural households in the minority areas,we collected flat data from 284 rural households in 32 villages across 12 counties of Western Sichuan from 2021 to *** conducted participatory household survey on the livelihood status of the rural households and try to identify the key factors to influence their livelihood vulnerability using multiple linear *** results showed that:the livelihood situation of the rural households is relatively *** vulnerability varies significantly with the income levels,education levels,and income *** vulnerability of farm households,categorized from low to high livelihood types,follows the sequence:non-agricultural dominant households,non-agricultural households,agricultural dominant households,and pure agricultural *** degree of damage to the natural environment,education costs,loan opportunities,the proportion of agricultural income to annual household income,and the presence of sick people in the household have significant positive effects on the livelihood vulnerability index(LVI)of rural households;while help from relatives and friends,net income per capita,household size,household education,agricultural land area,participation in industrial organizations,number of livestock,purchase of commercial houses,drinking water source,and self-supply of food have significant negative *** on the findings,we believe that local rural households operate in a complex livelihood system and recommend continuous interventions targeting key influences to provide empirical research support for areas facing similar situations.

关键词： Livelihood Vulnerability Rural households Ethnic areas

Production induced fracture closure of deep shale gas well under thermo-hydro-mechanical conditions

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Petroleum Science 2024年第3期21卷 1796-1813页

作者： Shi-Ming Wei yang Xia yan Jin Xu-yang Guo Jing-Yu Zi Kai-Xuan qiu Si-Yuan Chen College of Science China University of Petroleum(Beijing)Beijing102249China CNOOC Research Institute Ltd Beijing100028China The University of Hong Kong Hong Kong999077China

Deep shale gas reservoirs have geological characteristics of high temperature,high pressure,high stress,and inferior ability to pass through *** multi-stage fractured horizontal well is the key to exploiting the deep shale gas ***,during the production process,the effectiveness of the hydraulic fracture network decreases with the closure of fractures,which accelerates the decline of shale gas *** this paper,we addressed the problems of unclear fracture closure mechanisms and low accuracy of shale gas production prediction during deep shale gas *** we established the fluid—solid—heat coupled model coupling the deformation and fluid flow among the fracture surface,proppant and the shale *** the fluid—solid—heat coupled model was applied to the fracture network,it was well solved by our numerical method named discontinuous discrete fracture *** with the conventional discrete fracture method,the discontinuous discrete fracture method can describe the three-dimensional morphology of the fracture while considering the effect of the change of fracture surface permeation coefficient on the coupled fracture—matrix flow and describing the displacement discontinuity across the *** simulations revealed that the degree of fracture closure increases as the production time proceeds,and the degree of closure of the secondary fractures is higher than that of the primary *** creep and proppant embedment both increase the degree of fracture *** reduction in fracture surface permeability due to proppant embedment reduces the rate of fluid transfer between matrix and fracture,which has often been overlooked in the ***,it significantly impacts shale gas production,with calculations showing a 24.7%cumulative three-year yield *** study is helpful to understand the mechanism of hydraulic fracture ***,it provides the theoretical guidance for maintaining the long

关键词： Shalegas Fracture closure Fluid-solid-heat coupling Discontinuous discrete fracture

Sirolimus can promote the disappearance of renal angiomyolipoma associated with tuberous sclerosis complex:a prospective cohort study

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World Journal of Pediatrics 2024年第6期20卷 602-610页

作者： Shuo Dun yang-yang Wang Lin Wan qiu-Hong Wang Qian Lu Xiao-yan yang Qi Zhang Hui-Min Chen Lu-Peng qiu Li-Ping Zou Medical School of Chinese PLA Beijing 100853China Department of Pediatrics The First Medical CenterChinese PLA General HospitalBeijing 100853China Center of Epilepsy Beijing Institute for Brain DisordersBeijing 100069China

Background Renal angiomyolipoma(RAML)is the most common kidney lesion in patients with tuberous sclerosis complex(TSC),affecting about 80%of *** is a benign tumor that grows over time,usually bilaterally,and can easily lead to kidney complications such as acute ***,we investigated the efficacy and safety of sirolimus in children with TSC-associated RAML and explored the factors affecting tumor disappearance under sirolimus treatment through subgroup *** A prospective cohort study was *** was initiated at 1 mg/(m^(2)×day),and dose adjustments were made by a 2-week titration period to attain a trough blood concentration of 5-10 ng/*** disappearance of RAML in chil-dren after sirolimus treatment was observed,and Cox regression was used to screen the factors affecting tumor *** One hundred and twenty-six patients who met the criteria were *** 3 months,6 months,12 months,and 24 months of follow-up,tumors disappeared in 18(14.3%),30(23.8%),39(31.0%),and 42(33.3%)children,*** disappeared in 50(39.7%)children by the last visit of each individual,and 30(60%)of them occurred within 6 *** multivariate Cox regression analysis showed that patients with a smaller maximum tumor diameter at baseline had a higher tumor disappearance ***-six(29%)patients had stomatitis during the entire treatment period,and no serious *** Sirolimus could promote the disappearance of TSC-related *** disappearance rate was correlated with the maximum diameter at baseline,and the smaller the tumor was,the higher the disappearance *** is well tolerated in the treatment of RAML associated with TSC.

关键词： Angiomyolipoma mTOR inhibitor Sirolimus Tuberous sclerosis

Model-driven path planning for robotic plasma cutting of branch pipe with single Y-groove based on pipe-rotating scheme

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Advances in Manufacturing 2024年第1期12卷 94-107页

作者： yan Liu qiu Tang Xin-Cheng Tian School of Control Science and Engineering Shandong UniversityJinan250061People’s Republic of China Engineering Research Center of Intelligent Unmanned System Ministry of EducationJinan250061People’s Republic of China School of Mechanical and Electronic Engineering Shandong Jianzhu UniversityJinan250101People’s Republic of China

The automatic cutting of intersecting pipes is a challenging task in *** improved automation and accuracy,this paper proposes a model-driven path planning approach for the robotic plasma cutting of a branch pipe with a single ***,it summarizes the intersection forms and introduces a dual-pipe intersection *** on this model,the moving three-plane structure(a description unit of the geometric characteristics of the intersecting curve)is constructed,and a geometric model of the branch pipe with a single Y-groove is ***,a novel mathematical model for plasma radius and taper compensation is ***,the compensation model and groove model are integrated by establishing movable ***,to prevent collisions between the plasma torch and workpiece,the torch height is planned and a branch pipe-rotating scheme is *** the established models and moving frames,the planned path description of cutting robot is provided in this novel *** accuracy of the proposed method is verified by simulations and robotic cutting experiments.

关键词： Automatic groove cutting of intersecting pipes Model-driven robot path planning Plasma beam radius and taper compensation

Isolation and culture of human primary osteoblasts:Comparing the effects of differences in method details on osteoblast characteristics

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Genes & Diseases 2024年第2期11卷 546-549页

作者： Fei Chen yan Zhang Pai Peng Xiao-Ting Huang Zi-Han qiu Bao-Cheng Liu Tie-Lin yang Bo yang yan Guo Key Laboratory of Biomedical Information Engineering of Ministry of Education Biomedical Informatics & Genomics CenterSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi 710049China Department of Orthopaedics Shannxi Provincial People's Hospital (The Third Affiliated Hospital of Xi'an Jiaotong University)Xi'anShaanxi 710068China

Osteoblasts are essential in the maintenance of human bone homeostasis.1 The abnormal formation and impaired differentiation ability of osteoblasts are pivotal factors leading to bone-related diseases,suggesting that an indepth study of osteoblasts can provide novel treatment strategies for these diseases.2 Human primary osteoblasts are precious experimental models in bone-related research.3 However,the isolation and culture of human primary osteoblasts still have some difficulties and ***,we refined a method to isolate and culture human primary osteoblasts by taking cancellous bone through a bone tissue sampler and pre-digesting it with pancreatin,which makes the process easier,cheaper,and more ***,we compared the effects of the subtle changes in isolation and culture methods on the phenotype of human primary osteoblasts and examined the differences in morphology,proliferation,and differentiation between micro-explants cultured osteoblasts(MECOBs)and explants cultured osteoblasts(EC-OBs).

关键词： impaired culture details

CPT: a pre-trained unbalanced transformer for both Chinese language understanding and generation

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Science China(Information Sciences) 2024年第5期67卷 43-55页

作者： Yunfan SHAO Zhichao GENG Yitao LIU Junqi DAI Hang yan Fei yang Zhe LI Hujun BAO Xipeng qiu School of Computer Science Fudan University Shanghai Key Laboratory of Intelligent Information Processing Fudan University Zhejiang Lab

In this paper, we take the advantage of previous pre-trained models(PTMs) and propose a novel Chinese pre-trained unbalanced transformer(CPT). Different from previous Chinese PTMs, CPT is designed to utilize the shared knowledge between natural language understanding(NLU) and natural language generation(NLG) to boost the performance. CPT consists of three parts: a shared encoder, an understanding decoder, and a generation decoder. Two specific decoders with a shared encoder are pretrained with masked language modeling(MLM) and denoising auto-encoding(DAE) tasks, *** the partially shared architecture and multi-task pre-training, CPT can(1) learn specific knowledge of both NLU or NLG tasks with two decoders and(2) be fine-tuned flexibly that fully exploits the potential of the model. Moreover, the unbalanced transformer saves the computational and storage cost, which makes CPT competitive and greatly accelerates the inference of text generation. Experimental results on a wide range of Chinese NLU and NLG tasks show the effectiveness of CPT.

关键词： pre-trained model transformer language model generation unified model