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Optimization Transmission Efficiency with Driver Intention for Automotive Continuously Variable Transmission under Slip Mode

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Chinese Journal of Mechanical engineering 2021年第5期34卷 332-348页

作者： Ling Han Hui Zhang Ruoyu Fang Hongxiang Liu school of Mechanical and Aerospace engineering Jilin UniversityChangchun 130025China school of Mechatronic engineering Changchun University of TechnologyChangchun 130012China

This study proposes and experimentally validates an optimal integrated system to control the automotive continuously variable transmission(CVT)by Model Predictive Control(MPC)to achieve its expected transmission efficiency *** control system framework consists of top and bottom *** the top layer,a driving intention recognition system is designed on the basis of fuzzy control strategy to determine the relationship between the driver intention and CVT target ratio at the corresponding *** the bottom layer,a new slip state dynamic equation is obtained considering slip characteristics and its related constraints,and a clamping force bench is ***,a joint controller based on model predictive control(MPC)is designed taking internal combustion engine torque and slip between the metal belt and pulley as optimization dual targets.A cycle is attained by solving the optimization target to achieve optimum engine torque and the input slip in ***,the new controller provides good ***,performance is tested by actual CVT *** show that compared with traditional control,the proposed control improves vehicle transmission efficiency by approximately 9.12%-9.35%with high accuracy.

关键词： V-belt continuously variable transmission Model predictive control Drive intention Slip mode Transmission efficiency

Effect of NaCl doped into Bphen layer on the performance of tandem organic light-emitting diodes

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Chinese Physics B 2014年第8期23卷 564-567页

作者：肖志慧吴晓明华玉林毕文涛王丽张欣辛利文印寿根 school of Materials science and engineering Tianjin University of Technology Key Laboratory of Display Materials and photoelectric Devices Ministry of Education Tianjin Key Laboratory of photoelectric Materials and Devices

To improve the performance of tandem organic light-emitting diodes （OLEDs）, we study the novel NaCl as n-type dopant in Bphen：NaCl layer. By analyzing their relevant energy levels and cartier transporting characteristics, we discuss the mechanisms of the effective charge generation layer （CGL） of Bphen：NaCl （6 wt%）/MoO3. In addition, we use the Bphen：NaC1 （20 wt%） layer as the electron injection layer （ELL） combining the CGL to further improve the performance of tandem device. For this tandem device, the maximal current efficiency of 9.32 cd/A and the maximal power efficiency of 1.93 lm/W are obtained, which are enhanced approximately by 2.1 and 1.1 times compared with those of the single- emissive-unit device respectively. We attribute this improvement to the increase of electron injection ability by introducing of Bphen：NaCl layer. Moreover, the CGL is almost completely transparent in the visible light region, which is also important to achieve an efficient tandem OLEDs.

关键词： tandem OLEDs NaCl doping charge generation layer

Room-temperature NH_3 sensors with high sensitivity and short response/recovery times

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Chinese science Bulletin 2014年第4期59卷 447-451页

作者： Qingcheng Liang Di Li Shang Gao Dayong Jiang Jianxun Zhao Jieming Qin Jianhua Hou school of Materials science and engineering Changchun University of Science and Technology

Micro-sensors are fabricated by co-electrospinning In2O3and SnO2nanofibers on the substrates of SiO2/Si with interdigitated Pt signal *** total sensor area is 1.36 mm 9 0.55 mm and the active area is only0.63 mm 9 0.55 *** NH3sensing properties are obtained based on the sensors at room *** sensitivity is at most 28 when the sensors are exposed to NH3of 10 *** response time is 8 s or so and the recovery time is nearly 2 *** only fine selectivity,but also longtime stability is *** results not only demonstrate the obtained micro-sensors are very promising devices for NH3detection,but also show a possible route for large-scale NH3sensor fabrication at the industrial level.

关键词：微传感器恢复时间高灵敏度快速响应室温 NH3 SiO2 Si 器具

Deep Learning Models Based on Weakly Supervised Learning and Clustering Visualization for Disease Diagnosis

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Computers, Materials & Continua 2023年第9期76卷 2649-2665页

作者： Jingyao Liu Qinghe Feng Jiashi Zhao Yu Miao Wei He Weili Shi Zhengang Jiang school of Computer and Information engineering Chuzhou UniversityChuzhou239000China school of Computer science and technology Changchun University of Science and TechnologyChangchun130022China Zhongshan Institute of changchun university of science and technology ZhongshanChina school of Intelligent engineering Henan Institute of TechnologyXinxiang453003China

The coronavirus disease 2019(COVID-19)has severely disrupted both human life and the health care *** diagnosis and treatment have become increasingly important;however,the distribution and size of lesions vary widely among individuals,making it challenging to accurately diagnose the *** study proposed a deep-learning disease diagnosismodel based onweakly supervised learning and clustering visualization(W_CVNet)that fused classification with ***,the data were *** optimizable weakly supervised segmentation preprocessing method(O-WSSPM)was used to remove redundant data and solve the category imbalance ***,a deep-learning fusion method was used for feature extraction and classification recognition.A dual asymmetric complementary bilinear feature extraction method(D-CBM)was used to fully extract complementary features,which solved the problem of insufficient feature extraction by a single deep learning ***,an unsupervised learning method based on Fuzzy C-Means(FCM)clustering was used to segment and visualize COVID-19 lesions enabling physicians to accurately assess lesion distribution and disease *** this study,5-fold cross-validation methods were used,and the results showed that the network had an average classification accuracy of 85.8%,outperforming six recent advanced classification models.W_CVNet can effectively help physicians with automated aid in diagnosis to determine if the disease is present and,in the case of COVID-19 patients,to further predict the area of the lesion.

关键词： Classification COVID-19 deep learning segmentation unsupervised learning weakly supervised

Mesoporous TiO2 Nanofiber as Highly Efficient Sulfur Host for Advanced Lithium–Sulfur Batteries

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Chinese Journal of Mechanical engineering 2019年第4期32卷 207-212页

作者： Xinyu Shan Zuoxing Guo Xu Zhang Jie Yang Lianfeng Duan Key Laboratory of Automobile Materials School of Materials Science and Engineering Jilin University Changchun 130025China Advanced Institute of Materials science & Department of Materials science and engineering Changchun University of Technology Changchun 130012 China

Currently, lithium–sulfur batteries su er from several critical limitations that hinder their practical application, such as the large volumetric expansion of electrode, poor conductivity and lower sulfur utilization. In this work, TiO2 nanofibers with mesoporous structure have been synthesized by electrospinning and heat treating. As the host material of cathode for Li–S battery, the as prepared samples with novelty structure could enhance the conductivity of cathode composite, promote the utilization of sulfur, and relieve volume expansion for improving the electrochemical property. The initial discharge capacity of TiO2/S composite cathode is 703 mAh/g and the capacity remained at 652 mAh/g after 200 cycles at 0.1 C, whose the capacity retention remains is at 92.7%, demonstrating great prospect for application in high-performance Li–S batteries.

关键词： TiO2 nanofibers Mesoporous structure Lithium–sulfur batteries Cathode Electrochemical property

Parameter optimization for plasma-sprayed Al2O3p/Al composite coatings on AZ31 magnesium alloy

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China Welding 2010年第1期19卷 15-20页

作者：马凯孙大千谷晓燕李于朋宣兆志 school of Materials science and engineering Jilin University Changchun130022. College of Mechanical and Electrical engineering Changchun Institute of Technology Changchun 130012 school of Materials science and engineering Changehun University of Technology Changchun 130012

Al2O3p/Al composite coatings were prepared on the surface of AZ31 magnesium alloy by plasma spraying technology with mixed powders of Al and Al2O3. An orthogonal test containing six factors and five levels was carried out to acquire the optimum technical parameters. Mierostruetures and properties of the composite coatings were studied. The results show that the coatings consist of Al2O3 particulates distributed uniformly and Al matrix, and the interface between the particulate and matrix is continuous, compact and clean. With increasing the mass fraction of Al2O3 in the mixed powders, the volume fraction of Al2O3 in the coatings iacreases. The Al2O3p/Al composite coating with 14% Al2O3 volume fraction has more compact microstrueture and more satisfactory properties.

关键词： plasma spraying Al2O3p/Al composite coating microstructure parameter optimization

Study on the Pr:KYF ultraviolet laser at 305 nm pumped by blue laser

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Optoelectronics Letters 2012年第5期8卷 325-327页

作者：倪天怡李永亮张天乙阮仁秋 school of Optoelectronic engineering Changchun University of Science and Technology

An all-solid-state Pr:KY3F10(Pr:KYF) laser pumped by blue laser(471 nm) has been *** the incident pump power of 2.6 W,the maximum output power at 610 nm is 213 ***,the intracavity second-harmonic generation(SHG) is al... 详细信息

关键词： Magnetic materials Optoelectronic devices

Kinematics of Non-axially Positioned Vesicles through a Pore

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Chinese Journal of Polymer science 2020年第7期38卷 776-783,I0008页

作者： Yun-Long Han Ming-Ming Ding Rui Li Tong-Fei Shi school of Materials science and engineering Changchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China school of Applied Chemistry and engineering University of Science and Technology of ChinaHefei 230026China

We employ finite element method to investigate the kinematics of non-axially positioned vesicles through a *** complete the coupling between fluid flow and the vesicle membranes,we use the fluid structure interactions with the arbitrary Lagrangian Eulerian *** results demonstrate that the vesicles show different deformations in migration process,in turn an oblique ellipse-shape,slipper-shape,*** find that the rotation angle of non-axially positioned vesicles mainly shows the trend of increase,besides the small fluctuation induced by deformation ***,when the vesicles move towards the axis of the channel,the rotation angle exhibits a decrease because of the decrease of the shear ***,rotation of axially positioned vesicles hardly occur due to symmetrical shear *** results further indicate that the rotation is faster nearby the pore for non-axially positioned *** work answers the mapping between the positions of vesicles and deformed states,as well as the change of rotation angle and rotation velocity,which can provide helpful information on the utilization of vesicles in pharmaceutical,chemical,and physiological processes.

关键词： Vesicles Narrow pore Rotation angle Rotation velocity

Fractional Order [Proportional Integral] Controllers Parameters Algorithm Based on the Vector Method

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Journal of Harbin Institute of technology(New Series) 2015年第1期22卷 91-98页

作者： Nianchun Cai Chunyang Wang Meng Wu Ruihao Xin school of Electronic and Information engineering Changchun University of Science and Technology

A new calculation method of fractional order [proportional integral ]( FO [PI ]) controller parameters is proposed. And the systematic design schemes of fractional order [proportional integral ]( FO[PI]) controllers based on vector method are discussed in detail. The FO[PI]controller parameters algorithm based on the vector method can be programmed in MATLAB. According to MATLAB programs of the FO[PI]controller parameters algorithm,the FO[PI] controllers are designed following the different phase margins,different gain crossover frequency and different plants,respectively. From the simulation results,the calculated parameters based on MATLAB program is unique and the designed FO[PI] controllers work efficiently.

关键词： fractional order controllers fractional order [pro