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中小型桑蚕养殖机械研究进展

农业工程 2024年第1期14卷 15-20页

作者：程方平赵帮泰张巍杨昌敏王义鹏郭曦四川省农业机械科学研究院四川成都610066

栽桑养蚕历史悠久,养蚕工艺古老而传统。随着经济和社会的发展,养蚕作为劳动密集型农业急需轻简化、机械化、自动化和智能化等多层级养蚕技术和装备。针对养蚕各生产环节和作业要求,介绍了桑蚕养殖机械研究现状和特点,总结了中小型桑蚕... 详细信息

栽桑养蚕历史悠久,养蚕工艺古老而传统。随着经济和社会的发展,养蚕作为劳动密集型农业急需轻简化、机械化、自动化和智能化等多层级养蚕技术和装备。针对养蚕各生产环节和作业要求,介绍了桑蚕养殖机械研究现状和特点,总结了中小型桑蚕养殖机械应用中存在问题,展望了桑蚕养殖机械研究发展趋势。

关键词：桑蚕养殖机械桑叶家蚕除沙上簇饲育

前列腺癌根治术后挽救性放疗的临床疗效及对患者控尿功能恢复影响的研究

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临床泌尿外科杂志 2024年第7期39卷 571-576,581页

作者：杨长珉詹江涛车宪平王鹏飞蒙绪松邓康俐胡志全胡鑫明海南医学院机构第二临床学院海口570100 海南医学院第二附属医院泌尿外科华中科技大学同济医学院附属湖北肿瘤医院泌尿外科华中科技大学同济医学院机构附属同济医院泌尿外科

目的:局限性高危前列腺癌患者在接受根治性前列腺切除术(radical prostatectomy,RP)后当出现生化复发(biochemical recurrence,BCR)或局部肿瘤复发(local recurrent disease,LRD)时通常需要接受挽救性放疗(salvage radiotherapy,SRT)治疗。本文研究了RP术后出现BCR或LRD并接受SRT治疗后患者的临床疗效。方法:回顾性分析海南医学院第二附属医院2006年9月—2018年9月局限性高危前列腺癌患者在RP治疗后出现BCR或LRD并接受了SRT治疗后的临床疗效及对控尿功能恢复的影响。主要研究终点为尿失禁发生率(urinary incontinence rate,UIR),次要研究终点为无生化进展生存期、无远处转移生存期、癌症特异性生存期及总生存期。此外,因放疗而引起的胃肠道系统(gastrointestinal,GI)和泌尿生殖系统(genitourinary,GU)的近期(90 d内)和远期(90 d后)不良反应(adverse effects,AEs)也纳入分析研究。结果:总共有85例患者纳入研究。中位随访时间为86(24,152)个月。有65例(76.5%)患者在SRT前具有满意的控尿功能。在接受了SRT后这65例患者中分别有2例(2.4%)和3例(3.5%)出现近期和远期CTCAE≥2级尿失禁。而在其余20例(23.5%)SRT前已有尿失禁症状的患者中,在接受了SRT后有1例(1.2%)患者在近期和远期均恢复了控尿功能,剩下的19例(22.4%)患者在近期保持稳定,此外有2例(2.4%)患者出现远期尿失禁程度加剧。在所有患者中Grade≥2级的GU和GI的近期AEs分别为5例(5.9%)和7例(8.2%),远期AEs分别为8例(9.4%)和9例(10.6%)。患者的5年无生化进展生存率、无远处转移生存率、总生存率和癌症特异性生存率分别为71.8%、85.9%、89.4%和95.3%。结论:SRT治疗RP后出现BCR或LRD的局限性高危前列腺癌患者具有良好的临床疗效及较少的近期和远期AEs。SRT治疗对控尿功能的恢复没有显著影响。

关键词：局限性高危前列腺癌根治性前列腺切除术挽救性放疗尿失禁

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农用柴油机在肉牛养殖中的应用

农业工程 2024年第4期14卷 5-8页

作者：杨昌敏赵帮泰郭曦程方平王义鹏张巍梅林森陈苗苗四川省农业机械科学研究院四川成都610066

柴油机是我国农业生产中不可或缺的动力源,农用柴油机种类繁多、经济性好、适应性强。近年来,伴随我国饮食结构调整,国家实施粮改饲、粮改畜,以肉牛养殖等为主的畜牧养殖业得到大力发展,机械化养殖作为现代化肉牛养殖的重要支撑,养殖各... 详细信息

柴油机是我国农业生产中不可或缺的动力源,农用柴油机种类繁多、经济性好、适应性强。近年来,伴随我国饮食结构调整,国家实施粮改饲、粮改畜,以肉牛养殖等为主的畜牧养殖业得到大力发展,机械化养殖作为现代化肉牛养殖的重要支撑,养殖各环节以柴油机为动力的农业机械得到了大量应用。以肉牛养殖为例,阐述了农用柴油机在牧草生产、收获、加工,以及肉牛饲喂和废弃物处理环节的配套应用,分析农用柴油机发展中存在的工作稳定性较差、噪声和排放较大问题,提出应用电控高压喷射等先进技术提升农用柴油机性能、做好农用柴油机与专业农机具的配套适应性,以及加强农用柴油机制造工艺和强化生产过程管理的发展策略。

关键词：农用柴油机单缸多缸肉牛养殖畜牧机械化

维普期刊数据库博看期刊

Flow characteristics and hot workability of a typical low-alloy high-strength steel during multi-pass deformation

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 323-336页

作者： Mingjie Zhao Lihong Jiang changmin Li Liang Huang Chaoyuan Sun Jianjun Li Zhenghua Guo School of Aeronautical Manufacturing Engineering Nanchang Hangkong UniversityNanchang 330063China Jiangxi Key Laboratory of Forming and Joining Technology for Aerospace Components Nanchang Hangkong UniversityNanchang 330063China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China China National Erzhong Group Deyang Wanhang Die Forging Co.LTD. Deyang 618000China Hubei Huangshi Mold Industrial Technology Research Institute Huangshi 435007China

Heavy components of low-alloy high-strength(LAHS) steels are generally formed by multi-pass forging. It is necessary to explore the flow characteristics and hot workability of LAHS steels during the multi-pass forging process, which is beneficial to the formulation of actual processing parameters. In the study, the multi-pass hot compression experiments of a typical LAHS steel are carried out at a wide range of deformation temperatures and strain rates. It is found that the work hardening rate of the experimental material depends on deformation parameters and deformation passes, which is ascribed to the impacts of static and dynamic softening behaviors. A new model is established to describe the flow characteristics at various deformation passes. Compared to the classical Arrhenius model and modified Zerilli and Armstrong model, the newly proposed model shows higher prediction accuracy with a confidence level of 0.98565. Furthermore, the connection between power dissipation efficiency(PDE) and deformation parameters is revealed by analyzing the microstructures. The PDE cannot be utilized to reflect the efficiency of energy dissipation for microstructure evolution during the entire deformation process, but only to assess the efficiency of energy dissipation for microstructure evolution in a specific deformation parameter *** a result, an integrated processing map is proposed to better study the hot workability of the LAHS steel, which considers the effects of instability factor(IF), PDE, and distribution and size of grains. The optimized processing parameters for the multi-pass deformation process are the deformation parameters of 1223–1318 K and 0.01–0.08 s^(-1). Complete dynamic recrystallization occurs within the optimized processing parameters with an average grain size of 18.36–42.3 μm. This study will guide the optimization of the forging process of heavy components.

关键词： low-alloy high-strength steel work hardening rate constitutive model hot workability multi-pass deformation

Surface reconstruction and structural transformation of twodimensional Ni-Fe MOFs for oxygen evolution in seawater media

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Nano Research 2024年第4期17卷 2429-2437页

作者： Liyuan Xiao Xue Bai Jingyi Han Tianmi Tang Siyu Chen Hui Qi changmin Hou Fuquan Bai Zhenlu Wang Jingqi Guan Institute of Physical Chemistry College of ChemistryJilin UniversityChangchun 130021China The Second Hospital of Jilin University Changchun 130021China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China Laboratory of Theoretical and Computational Chemistry Institute of Theoretical ChemistryCollege of ChemistryChangchun 130023China

As a four-electron transfer reaction,oxygen evolution reaction(OER)is limited by large overpotential and slow ***,we in-situ synthesized two-dimensional(2D)Ni-Fe metal-organic framework nanosheets on nickel foam(NixFe-TPA/NF,TPA=terephthalic acid)for oxygen evolution in alkaline and alkaline seawater *** 1 M KOH,Ni3Fe-TPA/NF shows a low overpotential(η10)of 189 mV at 10 mA·cm^(-2) and an ultra-low overpotential of only 260 mV at 500 mA·cm^(-2).In alkaline seawater,Ni3Fe-TPA/NF still provides impressive OER performance,with anη10 of 265 ***-situ Raman characterization results show that the phase transition occurs during the OER,and Ni3FeOOH with more oxygen vacancies is in-situ formed,reducing the OER energy *** functional theory(DFT)reveals that the synergy between Ni and Fe reduces the energy barrier and accelerates the rate-determining *** addition,the ultra-thin 2D sheet structure and the close combination of Ni3FeOOH and highly conductive NF support ensure the high catalytic OER ***,the surface reconstruction and structural modification strategy can be used to design and prepare high-performance OER electrocatalysts for energy-related applications.

关键词： density functional theory(DFT)calculation Ni3FeOOH oxygen evolution reaction seawater electrolysis surface reconstruction

A nitroreductase-responsive nanoprobe with homogeneous composition and high loading for preoperative non-invasive tumor imaging and intraoperative guidance

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Chinese Chemical Letters 2024年第7期35卷 313-318页

作者： Jingqi Xin Shupeng Han Meichen Zheng Chenfeng Xu Zhongxi Huang Bin Wang changmin Yu Feifei An Yu Ren Institute of Medical Engineering Department of BiophysicsSchool of Basic Medical ScienceHealth Science CenterXi'an Jiaotong UniversityXi'an 710061China School of Public Health Health Science CenterXi'an Jiaotong UniversityXi'an 710061China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech UniversityNanjing 211816China Department of Breast Surgery the First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061China

Tumor microenvironment(TME)-activatable probes have been proven to effectively increase signal-tobackground ratios(SBRs)and improve the success rate of complete tumor ***,many fluorescence probes have to be loaded into a nanocarrier for tumor targeted delivery,which consequently encounters poor drug loading,heterogeneous composition and non-encapsulated drug aggregates occurred during nanoformulation ***,a nitroreductase(NTR)-activated“OFF-ON”near-infrared fluorescence nanoprobe,named Nano Bodipy,was synthesized by the spontaneous self-assembling of NTRresponsive dye-polyethylene glycol(PEG)amphiphilic polymer in *** NTR-responsive dye acted as the hydrophobic segment in the amphiphilic polymer,yielding a homogeneous composition and a high loading of 12.2 wt%(according to calculation)in the synthesized Nano *** synthesized Nano Bodipy can efficiently accumulate in tumors via the enhanced permeability and retention(EPR)effect,enabling non-invasive tumor-targeted fluorescence imaging and guiding complete tumor *** the synthesized Nano Bodipy entered the tumor cells,they dissociated and were activated by overexpressed *** the real-time fluorescence guide of Nano Bodipy,complete tumor resection surgery was performed successfully.

关键词： Nitroreductase Tumor diagnosis Intraoperative guidance Self-assembly Nanoprobe

Application of Fractal Theory in Brick-Concrete Structural Health Monitoring

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Engineering（科研） 2016年第9期8卷 646-656页

作者： changmin yang Xia Zhao Yanfang Yao Zhongqiang Zhang Architectural Engineering Institute Hebei University Baoding China Hebei College of Science and Technology Baoding China

In order to monitor and forecast the deformation of the brick-concrete building, by taking a brick-concrete building as research object, fiber grating sensors were used to collect the monitoring data and double logarithmic curve of limit value characteristic and monitoring data were obtained based on the fractal theory. Constant dimension fractal method cannot be used to analyze the data directly. With the method of variable dimension fractal, we accumulate data, and the double logarithmic curve is smooth. Piecewise fractal dimensions are close. The outer interpolation method is used to calculate the fractal dimension of the next point and then back calculate the vertical displacement. The relative errors are calculated by comparing the forecast values and monitoring values, and the maximum relative error is 5.76%. The result shows that the fractal theory is suitable to use in the forecast of the deformation and the accuracy is good.

关键词： Brick-Concrete Building Real-Time Monitoring Fiber Grating Sensors Constant Di-mension Fractal Variable Dimension Fractal Log-Log Line Prediction

Research on FAHP Method Based on Highway Bridge Safety

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Engineering（科研） 2018年第6期10卷 336-344页

作者： changmin yang Quanle Wang Ruining Wei Kuo Lu College of Civil Engineering Hebei University Baoding China

Basing on highway bridge construction technique and management features, this paper conducts analysis and establishment to construction safety risk factor, index system, etc. of actual engineering, after using vague synthetic judgment method, analytic hierarchy process, implement research via integrated evaluation method, makes out argument to different safety risk factors, establishes bridge safety risk factor collection via method of comprehensive assessment, confirms bridge safety risk incidence value, judges matrix by using MATLAB construction vagueness, finally calculates concrete risk gradation sort, and gets highway bridge construction safety risk grade. Through practice it has proved that the construction safety risk assessment method is based on the method of quantification, can find out biggest influence factors on the safety of Bridges in engineering, and can also reduce the misjudgment caused by subjective factors. The safety of the bridge has a positive practical significance.

关键词： Highway Bridge FAHP Method Safety Risk Assessment Weight Sorting

Finite Element Simulation Analysis of Compressed Material in Intelligent Compaction

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Engineering（科研） 2018年第4期10卷 173-186页

作者： changmin yang Ruining Wei Yanfang Yao Quanle Wang College of Civil Engineering Hebei University Baoding China Hebei College of Science and Technology Baoding China

In order to improve the quality of the project, we adopt the intelligent compaction control system and collect CMV values through experiments. In the experiment using finite element simulation software to simulate and analyze. From the simulation results to analyze the road surface displacement and stress trends, derived from the displacement of the pressed material in the fifth pass, the sixth pass is almost the same, the rate of change close to 0, can be considered pressed material has the desired pressure.?The actual degree is in good agreement with the actual compaction of sand filling, indicating that the compaction state of the pressed material can also be verified from the stress angle of the pressed material. The stress change from the weak vibration to the strong vibration load increases first and then decreases rapidly, and the reduction of strong vibration is more obvious. Therefore, the simulation result also shows that the strong vibration has the better compaction effect than the weak vibration.

关键词： Intelligent Compaction CMV Values Finite Element Compactness Variation Trend