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International conference on Power System technology (POWErcoN)

作者： Shimin Gong Jin Zhu Nanzi Power Grid R&D Center Guodian Nanjing Automation Co. LtD Nanjing China School of Information and Communication Engineering Nanjing Institute of Technology Nanjing China

From the perspective of power equipment operation and maintenance management, this paper summarizes the limitations of traditional Pd monitoring, maintenance and operation, breaks through the traditional implementation methods, applies the advanced technology of ubiquitous Internet of things, and comprehensively considers the design from the aspects of acquisition mode, transmission means, diagnosis method and active decision feedback, puts forward a new monitoring system solution, and introduces the components of the monitoring system Some key technologies and implementation principles are introduced, and the typical engineering application implementation scheme is given. The results show that the operation and maintenance efficiency and management level of electrical equipment can be greatly improved through the application of new technology, and lay a data foundation for the next step of artificial intelligence and big data application mining.

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Thermal Cycling Performance of Heterogeneous Sn-Ag-Cu Solder Joint with Minor Elements Addition 26

Thermal Cycling Performance of Heterogeneous Sn-Ag-Cu Solder...

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26th Electronics Packaging technology conference, EPTC 2024

作者： Bae, Joo Young Kim, Mi-Song Hong, Won Sik Yoo, Sehoon Moon, Jeong Tak Park, Sang-Bok Kang, Nam Hyun Korea Electronics Technology Institute Saenari-ro Seongnam-si Gyeonggi-do13509 Korea Republic of Korea Institute of Industrial Technology Gaetbeol-ro Incheon21999 Korea Republic of Solder Development Team R&D Center MK Electron Co. Ltd. Yongin-si Gyeonggi-do17030 Korea Republic of SNF Co. Ltd. 20 Singi-ro Yongin-si Gyeonggi-do17059 Korea Republic of Department of Materials Science and Engineering Pusan National University Busandaehak-ro 63 beon-gil Busan46241 Korea Republic of

ISBN: (纸本)9798331522001

coarse intermetallic compound (IMC) formation can lead to brittleness and generate cracks between the solder and the IMC interface under printed circuit board (PCB) warpage. Microstructure of the solder joint is closely related to its thermo-mechanical properties. Thus, it is essential to control the microstructure of the solder joint. Ball grid array (BGA) packages with 300 μm diameter Sn-3.0Ag-0.5Cu (SAC305) and Sn-2.5Ag-0.8Cu-0.05Ni-1.0Bi (SAC(-Ni,Bi)) solder balls were soldered with SAC305 solder paste on the PCB coupon. These combinations of homogeneous (SAC305 solder ball and paste) and heterogeneous (SAC(-Ni,Bi) solder ball and SAC305 paste) solder joints were prepared to compare solder joint reliability. To compare the solder joint reliability of homogeneous and heterogeneous solder joints, the shear strength of the solder joint was measured before and after thermal cycling tests. After the shear strength test, the area ratio of ductile-brittle fracture surfaces was also compared. The IMC thickness was measured and the crack propagation in the solder joint was analyzed before and after the thermal cycle test. © 2024 IEEE.

关键词： Thermal cycling

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Prediction of rOP Method Based on Online Machine Learning and Multi-source data Preprocessing technology

Prediction of ROP Method Based on Online Machine Learning an...

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IEEE International conference on Automation, Electronics and Electrical engineering (AUTEEE)

作者： Yang Yu Meng Cui Kai Huang Lei Luo Xiuling Zhang Hui Li CNPC Engineering Technology R&D Company Limited Beijing China Baoji Oilfield Machinery Co.Ltd Baoji China

ISBN: (纸本)9781665428408

The drilling operation is a large scale, technically complex and systematic project, which has always taken the top position of investment in oil exploration and development. Speed and efficiency are the primary goals of drilling engineering. Using information technology to optimize drilling parameters can reduce the complexity of accidents, improve the time efficiency of drilling, and significantly shorten the drilling construction cycle and save exploration and development costs. Forecasting drilling rate of penetration (rOP) is an essential component of drilling optimization. This paper introduces a machine learning-based permeability prediction method and its application effects. In response to the drilling rate of penetration (rOP) problem, a drilling rate of penetration (rOP) model based on an integrated learning algorithm is designed and implemented by mining the historical data collected from a specific block. Meanwhile, this approach is compared with traditional machine learning algorithms such as SVM, Lr and KNN. The experimental results indicate that the algorithm has better accuracy and applicability than other methods, which can provide a scientific and reliable reference for improving drilling rate of penetration (rOP) and technical support for realizing intelligent drilling.

关键词： drilling Measurement Machine learning algorithms Torque Machine learning Predictive models Prediction algorithms

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Simulation of Offshore Magnetic dipoles and Electric dipoles Based on Ocean Wave Spectrum

Simulation of Offshore Magnetic Dipoles and Electric Dipoles...

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International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： He-Feng Nie Lei Gao Lei Li Hui Zhang Antenna Research Department China Research Institute of Radios Propagation(CRIRP) Qingdao China School of Information and Electrical Engineering Hebei University of Engineering Handan China R&D Department Xi'an StarNet Antenna Technology Co. Ltd Xi'an China

ISBN: (数字)9798350353129

ISBN: (纸本)9798350353136

To study the impact of wave randomness on offshore antenna radiation characteristics, the ocean waves are geometrically modeled from the ocean spectrum using the wave equation, and the magnetic dipole and electric dipole antennas are jointly simulated with the ocean waves by the HFSS software, respectively. The input impedance and radiation patterns are analyzed at different positions, depths, and angles of inclination of the antennas. Simulation results show that at low frequencies, the real part of impedance is very small with the best radiation pattern uniformity. As frequency increases, the real part of impedance grows and the radiation pattern worsens, with electric dipole antenna showing higher directivity than magnetic dipole antennas.

关键词： dipole antennas Magnetic resonance imaging Simulation Propagation Oceans Ocean waves Software Mathematical models Impedance Antenna radiation patterns

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Optimization design method of optical encoders based on cascaded half-integer MMIs

Optimization design method of optical encoders based on casc...

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OptoElectronics and communications conference, OECC

作者： Meilin Zhong Yu Chen Wei Cao Shenghao Liu Xu Sun Gordon Ning Liu School of Electronic and Information Engineering Soochow University Suzhou China Silicon Photonics R&D Center CreaLights Technology Co. Ltd. Suzhou China Jiangsu New Optical Fiber Technology and Communication Network Engineering Research Center and School of Electronic and Information Engineering Soochow University Suzhou China

ISBN: (数字)9798350308396

ISBN: (纸本)9798350308402

An automated method is proposed to optimize a compact optical encoder based on half-integer multimode interferometers (MMIs). We employ the improved particle swarm optimization (PSO) algorithm to reconfigure the phase shifters. Good convergence and robustness are demonstrated by applying the method into the switch of encoding states under fabrication errors.

关键词： Optical interferometry Optical switches Optical device fabrication Optical propagation Optimization methods couplers Adaptive optics Optical coupling robustness Particle swarm optimization

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recent Advances of Monolithic All-Perovskite Tandem Solar Cells:From Materials to devices

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Chinese Journal of Chemistry 2022年第7期40卷 856-871页

作者： Shan Jiang Yiming Bai Zongwen Ma Shengli Jin Chao Zou Zhao'ao Tan State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Solar Energy Utilization&Energy Saving Technology of Zhejiang Province Zhejiang Energy Group R&D Institute Co.Ltd.HangzhouZhejiang 311121China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhouZhejiang 325027China

Organic-inorganic metal-halide perovskite solar cells(PerSCs)have achieved significant progresses due to their outstanding optoelectronic charac-teristics,and the power conversion efficiency(PCE)of single-junction PerSCs has been boosted from 3.8%to a certified 25.2%.However,the efficien-cy of single-junction cells is governed by the Shockley-Queisser(S-Q)radiative limit,and fabricating all-perovskite tandem solar cells is a particularly attractive method to break the S-Q *** the bandgap of lead(Pb)-based mixed halide perovskite can be tuned from 1.55 eV to 2.3 eV,and the mixed tin(Sn)-Pb perovskites have bandgap of~1.2 eV,these perovskites become the best candidates for the front and rear subcells of all-perovskite tandem device,*** this review,we firstly summarize the current development progresses of two-terminal(2-T)all-perovskite tandem so-lar *** further optimizing the device performance,the wide bandgap mixed halide perovskites for front subcell,mixed Sn-Pb narrow bandgap perovskites for rear subcell,and the interconnection layer(ICL)of 2-T tandem device are then *** review aims to open a pathway to real-ize highly efficient all-perovskite tandem solar cells.

关键词： Perovskite phase Tandem solar cells Interconnection layer Energy conversion complementary absorption

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Study on the Antioxidation of coated Nana-copper 22

Study on the Antioxidation of Coated Nana-copper

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22nd International conference on Electronic Packaging technology, ICEPT 2021

作者： Zhang, Weijie Zhou, Quan Gao, Chenshan Liu, debo Li, Jun Ye, Huaiyu Sky Chip Interconnection Technology Co. LTD. R&d Department Shenzhen China College of Optoelectronic Engineering Chongqing University Chongqing China Shennan Circuits Co. LTD. R&d Department Shenzhen China Southern University of Science and Technology Shenzhen Institute of Wide-Bandgap Semiconductors School of Microelectronics Shenzhen China

ISBN: (纸本)9781665413916

Ensuring that there is no oxidation on the surface of the nano-copper particles is an important task to make sure the subsequent sintering performance. In order to reduce the surface oxidation of nano-copper particles, this research mainly studies the benzotriazole (BTAH) coating. corresponding Xrd, TEM and XPS test results show that after BTAH treatment, the oxidation degree of copper particles decreases. At the same time, organics related to BTAH is detected on the surface of the treated copper particles. This fully shows that the BTAH coating can effectively prevent the surface oxidation of copper nanoparticles, which lays a good foundation for further sintering experiments. © 2021 IEEE.

关键词： Oxidation

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The influence of inlet diameter and average hole diameter of one side liquid distributor on the performance of liquid distribution 4

The influence of inlet diameter and average hole diameter of...

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4th International Symposium on Power Electronics and control engineering, ISPECE 2021

作者： Yuan, Xingyang Zhao, Wei Zhan, Feilong Zhang, Hua ren, Tao College of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai200093 China Home Appliance R&D Center Co. Ltd Shanghai201106 China

ISBN: (数字)9781510650374

ISBN: (纸本)9781510650367

Taking a trapezoidal distributor with one side inlet as the research object, the effects of the diameter of inlet pipe and distribution hole on the velocity field, pressure field, liquid equalization performance and resistance performance of the distributor were studied. The simulation and analysis results show that the velocity gradient and pressure gradient near the liquid inlet pipe change greatly, and the flow rate of the liquid distribution hole near the liquid inlet pipe will decrease seriously;The results show that the pressure drop of the distributor decreases with the increase of the diameter of the liquid inlet pipe when the diameter of the liquid inlet pipe is in the range of 47mm∼110mm;With the decrease of the diameter of the distributing hole, the overall liquid distribution performance of the distributor can be significantly improved, but the overall pressure drop of the distributor will increase. The simulation results show that the diameter of the inlet pipe and the diameter of the distributing hole have a great influence on the performance of the distributor, which can provide an important direction for the optimization design of this type of distributor and is of great significance for engineering application. © coPYrIGHT SPIE. downloading of the abstract is permitted for personal use only.

关键词： Liquids

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Bi2Lane: Bi-directional Temporal refinement with Bi-Level Feature Aggregation for 3d Lane detection

Bi2Lane: Bi-Directional Temporal Refinement with Bi-Level Fe...

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IEEE International conference on robotics and Automation (ICrA)

作者： Chengxin Li Yihui Hu Zewen Zheng Xiang Gao Yongqiang Mou Peng Nie Jun Li R&D Center Guangzhou Automobile Group Co Ltd. China South China Academy of Advanced Optoelectronics South China Normal University China School of Computer Science and Technology Guangdong University of Technology China School of Information Engineering Guangdong University of Technology China

ISBN: (数字)9798350384574

ISBN: (纸本)9798350384581

Monocular 3d lane detection has recently received increasing research attention in autonomous driving due to its application effectiveness and simplicity. However, depending solely on the limited semantic information from a single image makes current monocular detection methods unable to deal with complex scenarios, such as occluded, blurred, and unaligned scenes. In this study, we introduce an end-to-end framework named Bi 2 Lane which models temporal dependency in a continuous sequence. It recurrently utilizes detected lanes within historical frames as prior information to achieve robust lane detection. Additionally, Bi 2 Lane employs temporal reverse refinement together with temporal forward refinement to achieve bi-directional temporal refinement (BdTr) while maintaining a robust temporal dependency. For the refined features of different frames, we design a bi-level feature aggregation module (BLFA) to fuse them in both point-level and line-level manners, enabling a comprehensive feature representation to deal with complicated road scenes. Extensive experiments conducted on the OpenLane dataset demonstrate the superiority of Bi 2 Lane, achieving a notable F1 score of 63.8% using a simple resNet50 backbone, surpassing the performance of existing state-of-the-art methods.

关键词： Three-dimensional displays Lane detection Fuses roads Semantics Bidirectional control Feature extraction

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research on Smart Photovoltaic Power Station control System Based on dCS Architecture

Research on Smart Photovoltaic Power Station Control System ...

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computer communication, Networks and Information Science (CCNIS), International conference on

作者： Lei Zhan State R&D Center of Control System and Information Security Technologies for Energy Industry Chn Energy Zhishen Control Technology Co. Ltd. Beijing Engineering Research Center of Power Station Automation Beijing China

ISBN: (数字)9798331507046

ISBN: (纸本)9798331507053

Aiming at the operation and maintenance management and control issues of large-scale photovoltaic power stations, a smart photovoltaic power station control system based on dCS architecture was studied. In terms of system architecture design, the design idea based on the “cloud-edge-end” architecture is adopted, and some core equipment and data storage devices in the site are placed in the cloud to achieve centralized management and storage of data. At the same time, some computationally intensive tasks are processed in the cloud to reduce the computing pressure on edge devices. Applying this system to the control of photovoltaic power plants can achieve precise control of operation and maintenance data, and enable the identification and accurate processing of different faults. comparing the fault identification algorithm used in this system with other algorithms, the results prove that the fault identification accuracy of this algorithm can reach 100℅, creating a large amount of economic benefits for the stable operation of photovoltaic power plants.

关键词： Photovoltaic systems Fault diagnosis Economics Accuracy Systems operation Systems architecture computer architecture control systems Maintenance Monitoring

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