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工业设计技术赛项对高职院校机械类相关课程的促进作用

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农机使用与维修 2023年第10期 147-150页

作者：纪海峰辽宁建筑职业学院辽宁辽阳111000

“以赛促教、以赛促学、学赛结合”的专业技能竞赛一直是高职院校的教学重点。该文以全国职业院校技能大赛高职组中的“工业设计技术”赛项为例,阐述了此赛项对高职院校机械类相关课程教学起到了促进作用,可为今后机械类相关课程教学提... 详细信息

“以赛促教、以赛促学、学赛结合”的专业技能竞赛一直是高职院校的教学重点。该文以全国职业院校技能大赛高职组中的“工业设计技术”赛项为例,阐述了此赛项对高职院校机械类相关课程教学起到了促进作用,可为今后机械类相关课程教学提供参考和借鉴。

关键词：技能大赛工业设计技术逆向工程三维建模 CNC编程与加工机械类课程

高职院校“理实一体化”课程体系的教学模“式”研究与探索——以《计算机辅助联机加工》课程为例

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现代制造技术与装备 2018年第11期54卷 207-208页

作者：纪海峰辽宁建筑职业学院辽阳111000

针对高职院校教学特点,介绍开展"理实一体化"教学模式的意义,分析了国内高职院校"理实一体化"教学目前存在的问题,并以计算机辅助联机加工课程为例,探讨了"理实一体化"教学模式的具体操作流程,为其他院校和专业开展"理实一体化"教学模... 详细信息

针对高职院校教学特点,介绍开展"理实一体化"教学模式的意义,分析了国内高职院校"理实一体化"教学目前存在的问题,并以计算机辅助联机加工课程为例,探讨了"理实一体化"教学模式的具体操作流程,为其他院校和专业开展"理实一体化"教学模式提供了参考依据。

关键词：理实一体化课程体系教学模式

虚拟样机技术在数控加工车床设计研究中的应用

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农机使用与维修 2017年第11期 6-7页

作者：纪海峰辽宁建筑职业学院辽宁辽阳111000

以数控加工车床为例,介绍了数控车床的特点,阐述了虚拟样机技术在数控车床设计与研究方面的应用,并结合Abaqus软件对数控车床主轴零部件进行有限元分析,以此来对主轴的设计加以验证。

关键词：数控车床虚拟样机 Abaqus 有限元分析

基于新型C^4 D的小管道气液两相流流型辨识方法

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北京航空航天大学学报 2017年第11期43卷 2273-2279页

作者：盛碧霞冀海峰王保良黄志尧李海青浙江大学控制科学与工程学院工业控制技术国家重点实验室杭州310027

基于径向结构的电容耦合式非接触电阻抗检测传感器,结合小波包分析技术和K-均值聚类算法,提出一种小管道气液两相流流型辨识方法。首先,利用径向结构的电容耦合式非接触电阻抗检测传感器,获取反映被测流体信息的电阻抗测量信号实部信息... 详细信息

基于径向结构的电容耦合式非接触电阻抗检测传感器,结合小波包分析技术和K-均值聚类算法,提出一种小管道气液两相流流型辨识方法。首先,利用径向结构的电容耦合式非接触电阻抗检测传感器,获取反映被测流体信息的电阻抗测量信号实部信息和虚部信息。然后,采用小波包分解的信号处理技术将实部信息和虚部信息分别分为4个频率段,提取不同频率范围的能量分布情况,并与各自的均值、方差构成特征向量。最后,利用K-均值聚类算法进行模式分类,建立流型辨识模型。在内径为3.5 mm和5.5 mm的玻璃管道内进行验证实验,实验结果表明,所获得的传感器测量信号能反映流体流动信息,提出的流型辨识技术路线是有效的,流型辨识精度可达88%以上。

关键词：电容耦合式非接触传感器流型辨识两相流小波包分析 K-均值聚类算法

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非接触式地表水电导率检测系统

仪器仪表学报 2012年第7期33卷 1620-1625页

作者：王保良徐升继冀海峰黄志尧李海青浙江大学控制科学与工程学系工业控制技术国家重点实验室杭州310027

将电容耦合非接触电导检测技术应用于地表水电导率检测,研制了非接触式地表水电导率测量传感器,建立了一种新型非接触式检测系统。利用有限元仿真的方法建立了传感器的仿真模型,对传感器结构参数的优化进行了研究,并分析了该系统的抗杂... 详细信息

将电容耦合非接触电导检测技术应用于地表水电导率检测,研制了非接触式地表水电导率测量传感器,建立了一种新型非接触式检测系统。利用有限元仿真的方法建立了传感器的仿真模型,对传感器结构参数的优化进行了研究,并分析了该系统的抗杂质干扰能力。系统测试结果表明,将该检测系统应用于地表水电导率检测是可行的。该系统具有传感器结构简单、电极非接触和抗杂质干扰能力强等特点,可以满足地表水电导率野外长期在线实时检测的要求。

关键词：地表水电导率电容耦合非接触式检测

Transitional Revenue Scheme for High-cost Generator Unit in Guangdong Electricity Market Based on Government Authorized Contracts

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 208-221页

作者： jisong Zhu Baike Chen Tianyao ji Zhaoxia jing School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China

High-cost generator units are at a cost disadvantage in electricity spot *** study focuses on revenue mechanisms of gas-fired units affected by power market reform in Guangdong province,*** the first time,we compare impacts on market indicators of five settlement mechanisms:feed-in tariff(FiT),location marginal price(LMP),contract for difference(CFD),direct subsidy(DS),and estimated revenue method(ERM).In particular,we design key parameters,including authorized CFD and ERM of two kinds of government authorized contracts based on traditional dispatching patterns to avoid significant profit fluctuations brought by market *** also analyze impact of factors such as climbing performance,seasonal load,and subsidy amount on the overall market and its *** of a case study show to directly subsidize gasfired units will lead higher-cost units to generate more electricity,with a resulting loss of social *** of market prices and provision of unreasonable incentives are fatal disadvantages of this subsidy *** government and policymakers should consider financial means to adjust benefits to reduce production costs and increase social ***,by case analysis,the ERM shows its stable performance in revenue of high-cost units,while we find that authorized CFD is not applicable for gas-fired units whose output is unstable as a marginal unit ***,we suggest government agencies adopt ERM to sign contracts with gas-fired units,to attain a balance between fairness and efficiency.

关键词： Guangdong electricity market high-cost generator unit settlement mechanism subsidy

Experimental and numerical investigation of two blended blade and endwall configurations

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CHINESE JOURNAL OF AERONAUTICS 2024年第9期37卷 150-163页

作者： Meng, Tongtong Li, Xin Zhou, Ling ji, Lucheng Tsinghua Univ Inst Aero Engine Beijing 100084 Peoples R China Beijing Inst Technol Sch Aerosp Engn Beijing 100081 Peoples R China

The Blended Blade and Endwall (BBEW) technique has proven to be effective in controlling the intersection of boundary layer in corner region of the compressor endwall. In this study, the experiment and analysis of two different BBEW designs are emphasized. First, based on a linear cascade with 0.7 Mach number inflow, two different configurations, BBEW 1 and BBEW 2, are well conducted. Then, according to the experimental result, control effects of these two BBEW configurations are validated and compared subsequently under various working conditions. The results demonstrate a reduction in total pressure loss of 12.8% and 29% at the design point for BBEW 1 and BBEW 2, respectively. Consequently, the BBEW technique proves effective in suppressing the development of the boundary layer and preventing corner separation. Followed by detailed numerical analysis, improvements around the corner region, especially for the boundary layer, are extracted to show the mechanisms and distinctions between the two configurations. The results indicate that BBEW 1 significantly restrains the development of boundary layer before separation occurs, while BBEW 2 directly controls the strength and scale of the corner separation. (c) 2024 Production and hosting by Elsevier Ltd. on behalf of Chinese Society of Aeronautics and Astronautics.

关键词： Aerodynamic Computational fluid dynamic Experiment Corner separation Blended Blade and Endwall (BBEW) COMPRESSOR DESIGN SUCTION FLOW

Polyoxometalates for continuous power generation by atmospheric humidity

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Nano Research 2024年第3期17卷 1875-1885页

作者： Tuo ji Weilin Chen Zhenhui Kang Liming Zhang Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Northeast Normal UniversityChangchun 130024China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices DepartmentSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipaMacao 999078China Institute of Functional State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China

Atmospheric humidity is a sustainable low-value energy widely existing in natural environment,which is a promising candidate to solve the noncontinuous and low efficiency of low-value energy power *** the mono-substituted Dawson-type polyoxometalates are constructed to be highly dispersed organic ammonium-polyoxoanion clusters and are assembled into thin films power generators with micropores,working in atmospheric *** optimal polyoxometalates generator with the thickness of 7.2μm and the area of 0.36 cm^(2) produces a voltage of 0.68 V and a current density of 19.5μA·cm^(-2) under simulated natural environment,and works continuously and stably under almost all-natural environments(humidity 10%–90%).The highly dispersed polyoxometalate nanoclusters can form microporous in polyoxometalate films to effectively absorb atmospheric humidity and spontaneously form distribution gradient of water,which is the structural basis of power *** continuous power generation may be maintained by the effective adsorption and utilization of H_(2)O,the huge electrostatic field of organic ammonium-polyoxoanion clusters,and the reasonably designed polyoxometalates containing inorganic small ions with high *** is the first humidity generator designed with polyoxometalates,which may provide a new research direction for polyoxometalates in sustainable utilization of low-value energy.

关键词： atmospheric humidity continuous power generations nanomaterials polyoxoanions polyoxometalates

Machine learning model based on non-convex penalized huberized-SVM

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Journal of Electronic Science and Technology 2024年第1期22卷 81-94页

作者： Peng Wang ji Guo Lin-Feng Li School of Finance and Economics Xizang Minzu UniversityXianyang712082China Research Center for Quality Development of Xizang Special Industries Xianyang712082China School of Computer Science and Technology Xinjiang UniversityUrumqi830017China

The support vector machine(SVM)is a classical machine learning *** the hinge loss and least absolute shrinkage and selection operator(LASSO)penalty are usually used in traditional ***,the hinge loss is not differentiable,and the LASSO penalty does not have the Oracle *** this paper,the huberized loss is combined with non-convex penalties to obtain a model that has the advantages of both the computational simplicity and the Oracle property,contributing to higher accuracy than traditional *** is experimentally demonstrated that the two non-convex huberized-SVM methods,smoothly clipped absolute deviation huberized-SVM(SCAD-HSVM)and minimax concave penalty huberized-SVM(MCP-HSVM),outperform the traditional SVM method in terms of the prediction accuracy and classifier *** are also superior in terms of variable selection,especially when there is a high linear correlation between the *** they are applied to the prediction of listed companies,the variables that can affect and predict financial distress are accurately filtered *** all the indicators,the indicators per share have the greatest influence while those of solvency have the weakest *** companies can assess the financial situation with the indicators screened by our algorithm and make an early warning of their possible financial distress in advance with higher precision.

关键词： Huberized loss Machine learning Non-convex penalties Support vector machine(SVM)