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犁铧表面耐磨层的消失模铸渗工艺研究

铸造技术 2010年第9期31卷 1205-1208页

作者：高红霞崔晓康海伟刘建秀郑州轻工业学院机电工程学院河南郑州450002 郑州大学综合设计研究院河南郑州450002

采用消失模铸渗工艺在铸钢犁铧表面制备WC颗粒增强钢基复合材料耐磨层。介绍了铸渗的工艺流程、铸渗用耐磨涂料的配方和涂覆工艺、铸造工艺参数的确定原则;研究了浇注工艺对铸渗件质量的影响,测试分析了铸渗层的硬度及耐磨性。结果表明... 详细信息

采用消失模铸渗工艺在铸钢犁铧表面制备WC颗粒增强钢基复合材料耐磨层。介绍了铸渗的工艺流程、铸渗用耐磨涂料的配方和涂覆工艺、铸造工艺参数的确定原则;研究了浇注工艺对铸渗件质量的影响,测试分析了铸渗层的硬度及耐磨性。结果表明,犁铧的铸渗部位与内浇道部位的相对位置对铸渗质量影响较大,铸渗部位位于浇口之上可得到较好的铸渗犁铧件;犁铧铸渗层的硬度是基体的1.7倍,耐磨性是基体的2.97倍。

关键词：犁铧消失模铸造铸渗涂料铸造工艺

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“性道德与社会文明关系”论

甘肃高师学报 2017年第7期22卷 85-91页

作者：陈维荣哈玉红姚爱琴兰州城市学院马克思主义学院甘肃兰州730070

性道德与社会文明之间不仅有区别,也应存在着相互联系、相互作用。考察性道德与社会文明之间的相互作用及其矛盾运动过程,尤其是挖掘、分析进步的性道德对社会文明进程的作用,不仅是性道德研究的进一步深入,而且也有助于当代大学生思想... 详细信息

性道德与社会文明之间不仅有区别,也应存在着相互联系、相互作用。考察性道德与社会文明之间的相互作用及其矛盾运动过程,尤其是挖掘、分析进步的性道德对社会文明进程的作用,不仅是性道德研究的进一步深入,而且也有助于当代大学生思想政治教育,有助于当代大学生选择并树立正确的性道德观。

关键词：性道德社会文明相互作用

Tuning interfacial charge transfer for efficient visible-light-driven photodegradation and simultaneous H_(2)evolution

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Journal of Materials Science & Technology 2024年第1期168卷 35-49页

作者： Zhiyang Li Yaogang Chen Yinghe Zhang wei Ai Qian Lei Tingjun Yao Dan Zhong Wenjie Liu Wenbiao Jin Lei Yang State Key Laboratory of Urban Water Resource and Environment Shenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen 518055China Key Laboratory of Northwest Water Resources Environment and EcologyMinistry of EducationSchool of Environmental and Municipal EngineeringXi’an University of Architecture and TechnologyXi’an 710055China CNAS Accredited Test Center Guangdong Engineering Technology Research Center of Air PurificationHealthlead Co.Ltd.Shenzhen 518055China School of Science Harbin Institute of Technology ShenzhenShenzhen 518055China

The edge-graphitized carbon nitride(C_(3)N_(4)-C g)was prepared by secondary pyrolysis to construct ZnO/C_(3)N_(4)-C g(ZCN)type-Ⅱheterojunction photocatalyst via a facile sonication dispersion method,which achieved∼7.04-fold and∼18.3-fold enhanced visible-light-driven photocatalytic performance for refrac-tory micropollutant removal and simultaneous hydrogen(H_(2))evolution respectively compared to con-ventional ZnO/g-C_(3)N_(4)Step-scheme *** apparent quantum efficiency of the ZCN_(0.4)het-erojunction reaches 0.92%(λ=420 nm).Such excellent performance stems from that the edge-graphene moieties stitched onto the interface of heterojunction extend light absorption to the full visible spec-trum,meanwhile,the built-in electric field generated during Fermi level alignment accompanying fa-vorable band-bending structure provides an effective pathway for the rapid migration of photoinduced electrons via the edge graphene channel to improve interfacial charge separation ***,the midgap states introduced in ZCN heterojunction could temporarily retain photoexcited electrons to effectively inhibit the in situ carrier recombination for improved photocatalytic H_(2)***,ZCN/peroxymonosulfate system exhibited excellent anti-interference performance against complex water bodies under visible illumination due to the synergistic effect between the co-existing anions and organic ***,the eco-friendly nature of the ZCN/peroxymonosulfate system showed no biotoxicity of reaction filtrate on cell proliferation after treatment,which avoided secondary ***-ering the outstanding performance in photocatalysis,the ZCN system exhibits broad potential for practical applications in water pollution control and green energy production.

关键词： ZnO C_(3)N_(4)-C g Heterojunction Photodegradation Hydrogen evolution

Carbon nanotubes-reinforced polylactic acid/hydroxyapatite porous scaffolds for bone tissue engineering

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Frontiers of Materials Science 2024年第1期18卷 59-69页

作者： weiwei Lan Mingbo Wang Zhenjun Lv Jun Li Fuying Chen Ziwei Liang Di Huang Xiaochun wei weiyi Chen Research Center for Nano-Biomaterials&Regenerative Medicine Department of Biomedical EngineeringCollege of Biomedical EngineeringTaiyuan University of TechnologyTaiyuan 030024China Guangdong Engineering Technology Research Center of Implantable Medical Polymer Shenzhen Lando Biomaterials Co.Ltd.Shenzhen 518107China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030060China Department of Orthopaedics The Second Hospital of Shanxi Medical UniversityTaiyuan 030001China

In the field of bone defect repair,critical requirements for favorable cytocompatibility and optimal mechanical properties have propelled research efforts towards the development of composite *** this study,carbon nanotubes/polylactic acid/hydroxyapatite(CNTs/PLA/ha)scaffolds with different contents(0.5,1,1.5 and 2 wt.%)of CNTs were prepared by the thermally induced phase separation(TIPS)*** results revealed that the composite scaffolds had uniform pores with high porosities over 68%and high through *** addition of CNTs significantly enhanced the mechanical properties of resulted PLA/ha,in which the 1.5 wt.%CNTs/PLA/ha composite scaffold demonstrated the optimum mechanical behaviors with the bending elastic modulus of(868.5±12.34)MPa,the tensile elastic modulus of(209.51±12.73)MPa,and the tensile strength of(3.26±0.61)***,L929 cells on the 1.5 wt.%CNTs/PLA/ha scaffold displayed good spreading performance and favorable ***,it is expected that the 1.5 wt.%CNTs/PLA/ha scaffold has potential applications in bone tissue engineering.

关键词： CNTs/PLA/ha scaffold TIPS method mechanical property bone tissue engineering

Efficacy and safety of extracorporeal shock wave therapy combined with sodium hyaluronate in treatment of knee osteoarthritis:a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2024年第2期44卷 243-250页

作者： ZHOU Mingwang DONG Zhuanli wei Changhao FENG Lufang WANG Xiaoping LIU haiping JI Xing YANG Kehu LI Shenghua Department of Orthopaedics Gansu Provincial Hospital of Traditional Chinese MedicineLanzhou 730050China Department of Quality Management Lanzhou Petrochemical General HospitalLanzhou 730050China Department of Orthopaedics Lanzhou Petrochemical General HospitalLanzhou 730050China Evidence-Based Social Science Research Center School of Public HealthLanzhou UniversityLanzhou730000China Evidence-Based Medicine Center School of Basic Medical SciencesLanzhou UniversityLanzhou 730000China Key Laboratory of Evidence Based Medicine and Knowledge Translation of Gansu Province Lanzhou 730000China Center for Translational Medicine Gansu Provincial Hospital of Traditional Chinese MedicineLanzhou 730050China Department of Orthopaedics Gansu Provincial Hospital of Traditional Chinese MedicineLanzhou 730000China

OBJECTIVE:To assess the efficacy and safety of extracorporeal shockwave therapy(ESWT)combined with sodium hyaluronate(ha)for the treatment of knee osteoarthritis(KOA).METHODS:PubM ed,Embase,the Cochrane Library,Web of Science,China National Knowledge Infrastructure,Wanfang database,China Science and Technology Journal Database,and SinoMed were searched from inception to July *** quality of the randomized controlled trials was evaluated independently by two reviewers according to the criteria in the Cochrane Collaboration for Systematic *** identified articles were then screened individually using EndnoteX9 for eligibility in this *** heterogeneity among the articles was evaluated using ***:A total of 17 studies,comprising 2000 individuals,were included in this *** results showed that a significant improvement was observed in knee pain and function based on the clinical efficacy of ESWT combined with *** analysis of clinical efficacy showed that[relative risk(RR)=1.21,95%confidence interval(CI)(1.12,1.30),Phat[standardized mean difference(SMD)=-2.84,95%CI(-4.01,-1.66),Phat[SMD=-1.57,95%CI(-2.52,-0.61),Phat[SMD=1.71,95%CI(0.98,2.44),Phat ESWT combined with ha offers an inexpensive,welltolerated,safe,and effective method to improve pain and functionality in patients with ***,tightly controlled,randomized,large multicenter trials are warranted to validate the current findings.

关键词： osteoarthritis knee randomized controlled trial extracorporeal shockwave therapy hyaluronic acid Meta-analysis

Hierarchy Method of Choosing Optimum Lines for Public Traffic Network Design

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Magnesium fertilizer application increases peanut growth and pod yield under reduced nitrogen application in southern China

2009中国控制与决策会议

作者： GAO Zheng-wei~1,PANG ha-Li~1,WU Zheng-Yu~1,YANG Xue-Yu~2 1.Institute of System Engineering,Northeastern University,Shenyang 110004,China 2.Department of Public Traffic Management,Shenyang Public Traffic Management Bureau,Shenyang 110004,China

＜正＞To improve performance of public traffic network,the hierarchy method of choosing optimum lines （HMCOL） is *** HMCOL,the lines of public traffic network are classified by three layers:backbone lines, limb lines,and branch lines,then the traffic lines of different layers are chosen by those specified roles on network and are integrated into hierarchy network,thus making whole traffic network cost-effective and ***,the shortcoming of neglecting branch lines assignment of conventional method is *** HMCOL principles and basic procedure for traffic network design are ***,the construction of hierarchy model for choosing lines,and the traffic network adjusting method with heuristic idea are described.A classic example is adopted to validate *** can be seen from experimental analysis that compared with the other research results,the public traffic network designed by HMCOL owns higher network coverage rate,and lower lines overlapping rate,and meets other function demand of the public traffic design.

关键词： Multi-objective Optimization Public Traffic Network Design Optimum Lines Choosing

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The Crop Journal 2024年第3期12卷 915-926页

作者： Yu Gao Ruier Zeng Suzhe Yao Ying Wang Jianguo Wang Shubo Wan wei Hu Tingting Chen Lei Zhang Guangdong Provincial Key Laboratory of Plant Molecular Breeding College of AgricultureSouth China Agricultural UniversityGuangzhou 510642GuangdongChina Shandong Academy of Agricultural Sciences Jinan 250100ShandongChina College of Agriculture Nanjing Agricultural UniversityNanjing 210095JiangsuChina

This study investigated the effect of magnesium application on peanut growth and yield under two nitrogen(N)application rates in acidic soil in southern *** chlorophyll content,net photosynthetic rate and dry matter accumulation of the N-sensitive cultivar decreased under reduced N treatments,whereas no effect was observed on the relevant indicators in the N-insensitive variety *** application increased the net photosynthetic rate by increasing the expression of genes involved in chlorophyll synthesis and Rubisco activity in the leaves during the pegging stage under 50%N treatment,while no effect on the net photosynthetic rate was observed under the 100%N *** rate of dry matter accumulation at the early growth stage,total dry matter accumulation and pod yield at harvest increased after Mg application under 50%N treatment by increasing the transportation of assimilates from stems and leaves to pods in both peanut varieties,whereas no effect was found under 100%N ***,Mg application increased the NUE under 50%N *** improvement of NUE in either peanut variety was found under 100%N treatment,while Mg application under the 50%N treatment can obtain a higher economic benefit than the 100%N *** acidic soil,application of 307.5 kg ha^(-1)of Mg sulfate fertilizer under 50%reduced nitrogen application is a suitable fertilizer management measure for improving carbon assimilation,NUE and achieve high peanut yields in southern China.

关键词： Peanut Magnesium Yield Reduced nitrogen application rate

Bus Stop Spacing Optimization Based on Uneven Distribution of Passenger Flow

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新建校区对高校债务形成与偿还的影响--基于75所教育部直属高校的实证分析

2009中国控制与决策会议

作者： GAO Zheng-wei~1,PANG ha-Li~1,NIU Guo-Dong~1,XU Zhen-Ning~2 1.Institute of System Engineering,Northeastern University,Shenyang 110004,China 2.Public Traffic Scheduling Center,Shenyang Public Traffic Management Bureau,Shenyang 110004,China

＜正＞As nodes of the public traffic network,bus stops play very important *** basic function of bus stops is distributing passengers *** bus stop spacing optimization is equivalent to a bounded knapsack problem and is a complicated NP *** is important for improving the public traffic service,the efficiency and comfort of transportation,and the bus *** this paper,a bus stops spacing optimization model based on uneven distribution of passenger flow was *** a corresponding genetic algorithm was designed for ***,the influence of inconstant dispatch of public vehicles to stop spacing was analyzed qualitatively and *** proposed model has been proved to be reasonable,practical and effective.

关键词： Bus Stops Spacing Optimization Distribution of Passenger Flow Genetic Algorithm

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教育经济评论 2022年第3期7卷 72-89页

作者：张文杰陈楚淘哈巍北京大学教育经济研究所湖南中医药大学教师教学发展中心

1999年高等教育大规模扩张,很多高校为拓展办学空间,开始在同城郊区建设新校区,并在基建等经费筹措压力下走向银校合作之路,后期又由于还贷能力弱等原因引发了全国性的高校债务危机。本文基于75所教育部直属高校2009—2016年的教育经费... 详细信息

1999年高等教育大规模扩张,很多高校为拓展办学空间,开始在同城郊区建设新校区,并在基建等经费筹措压力下走向银校合作之路,后期又由于还贷能力弱等原因引发了全国性的高校债务危机。本文基于75所教育部直属高校2009—2016年的教育经费统计数据,采用双向固定效应的因果推断方法,分析新建校区对高校债务形成与偿还的影响。研究发现:第一,新建校区显著增加了高校累计债务总量和还本付息压力;第二,高校债务来源主要是国内金融机构贷款,用途集中于基本建设;第三,新建校区建设越早,2009年之后形成的累计债务越少,还本付息压力也越小,并未形成逾期过久的不良债务情况;第四,高校每年的还本付息压力一定程度上挤压了教职工群体的总体经费支出规模,但人均工资福利支出得到保障。未来要提升高校自身多元化筹措经费的能力,并且进一步规范银校合作,尤其是在2019年以来高职连续扩招与新建校区需求增加的背景下要防止新一轮高校债务危机的爆发。

关键词：新建校区高校债务还本付息双向固定效应