检索结果-内蒙古大学图书馆

arXiv 2023年

作者： Ma, Shuailei Wang, Yuefeng Wei, Ying Fan, Jiaqi Li, Thomas H. Liu, Hongli Lv, Fanbing Northeast University Shenyang China Information Technology R&D Innovation Center of Peking University China School of Electronic and Computer Engineering Peking University Shenzhen Graduate School Shenzhen China Changsha Hisense Intelligent System Research Institute Co Ltd China

Open-world object detection (OWOd), as a more general and challenging goal, requires the model trained from data on known objects to detect both known and unknown objects and incrementally learn to identify these unknown objects. The existing works which employ standard detection framework and fixed pseudo-labelling mechanism (PLM) have the following problems: (ii) The inclusion of detecting unknown objects substantially reduces the model’s ability to detect known ones. (ii) The PLM does not adequately utilize the priori knowledge of inputs. (iii) The fixed selection manner of PLM cannot guarantee that the model is trained in the right direction. We observe that humans subconsciously prefer to focus on all foreground objects and then identify each one in detail, rather than localize and identify a single object simultaneously, for alleviating the confusion. This motivates us to propose a novel solution called CAT: LoCalization and IdentificAtion Cascade detection Transformer which decouples the detection process via the shared decoder in the cascade decoding way. In the meanwhile, we propose the self-adaptive pseudo-labelling mechanism which combines the model-driven with input-driven PLM and self-adaptively generates robust pseudo-labels for unknown objects, significantly improving the ability of CAT to retrieve unknown objects. Experiments on two benchmarks, ***, MS-COCO and PASCAL VOC, show that our model outperforms the state-of-the-art methods. The code is publicly available at https://***/xiaomabufei/CAT. Copyright © 2023, The Authors. All rights reserved.

关键词： Object detection

来源：评论

学校读者我要写书评

暂无评论

Leveraging Artificial Intelligence in Online Educational Platforms to Enhance Continuous Professional development in the Teaching Profession

Leveraging Artificial Intelligence in Online Educational Pla...

引用

International Conference on Computational and Characterization Techniques in engineering & Sciences (CCTES)

作者： Khujakulov Sherzod Amankulovich Mannabov Javlon Tokhirovich Kadirov Tulkin Bakhridinovich Taylakov Umid Kuvandikovich Christo Ananth T. Ananth Kumar Senior Teacher of the the Samarkand Regional National Center for Training Teachers in New Methods Teacher of the Samarkand Regional National Center for Training Teachers in New Methods (PhD) Samarkand Agroinnovations and Research University Department of Electronics and Communication Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Avadi Uzbekistan&Adjunct Faculty Samarkand State University Chennai India Computer Science and Engineering IFET College of Engineering Tamilnadu India

ISBN: (数字)9798350364699

ISBN: (纸本)9798350364705

To keep up with the dynamic nature of the modern classroom, teachers must have access to online learning platforms for professional development purposes. This investigation looks at how these platforms can be used to improve teachers' skills, make information sharing easier, and open doors to CPd opportunities. This study examines the relationship between online resources and methods to demonstrate how digital tools have an impact on teacher training and professional development by leveraging AI. It also draws attention to the fact that these platforms are helping with information-methodological support for teachers as well as the ongoing reforms in our nation. Incorporating empirical observations and case studies, the analysis demonstrates how effective online platforms are in fostering a collaborative and innovative environment for professional learning. digital transformation has the potential to radically alter how teachers obtain professional development, and this study emphasizes that fact. This will enable teachers to effectively address the demands of modern classrooms.

关键词： Training digital transformation Information sharing Focusing Collaboration Artificial intelligence

来源：评论

学校读者我要写书评

暂无评论

Structure Characterization and Bioactivities of Protein Hydrolysates of Chia Seed Expeller Processed with different Proteases in Silico and in Vitro

SSRN

引用

SSrN 2023年

作者： Chen, Jinghui Zhu, Ling Wu, Qiming Chen, Yiling Wu, Gangcheng Zhang, Hui School of Food Science and Technology Jiangnan University National Engineering Research Center for Functional Food Jiangnan University Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province Wuxi214122 China Nutrilite Health Institute Shanghai China Botanical R&D Centre Wuxi214115 China

Chia seed (CS) expeller was hydrolyzed by 6 proteases (Alcalase, Neutrase, Protamex, Papain, Flavourzyme, Trypsin) in different hydrolytic patterns to improve bioavailability and explore the structure-enzyme active site relationship. At the meantime, in silico hydrolysis was performed to obtain a series of proteolytic sequences of chia seed protein treated by different enzymes. The hydrolysates of non-animal derived protease were further determined by in vitro experiment in terms of health-promoting activities. It is necessary to remove fiber before protease hydrolysis, and Alcalase and Flavorzyme had a good effect on the degradation of residual fiber of CS meal. due to the diversity of enzyme cleave sites, the structure properties of hydrolysate treated by different proteases exhibited discrepancy. Furthermore, hydrolysates of CS meal presented varying bioactivity (antioxidant, hypoglycemic, hypotensive, hypolipidemic, anti-alcoholic activity). By contrast, Neutrase, Protamex and Papain hydrolysis showed significant impact on the production of multiple active functional factors. The highest percentual of angiotensin I converting enzyme inhibitory and alcohol dehydrogenase activation effect were observed in Neutrase and Flavourzyme hydrolysates, with lowest IC50 of 0.219±0.030 mg/mL and 0.047±0.002 mg/mL, respectively. Ultimately, an activity-oriented protease screening method was obtained. © 2023, The Authors. All rights reserved.

关键词： Hydrolysis

来源：评论

学校读者我要写书评

暂无评论

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

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

引用

Electronics Packaging technology Conference (EPTC)

作者： Joo Young Bae Mi-Song Kim Won Sik Hong Sehoon Yoo Jeong Tak Moon Sang-Bok Park Nam Hyun Kang Korea Electronics Technology Institute Gyeonggi-do Korea Korea Institute of Industrial Technology Incheon Korea Solder Development Team R&D Center MK Electron Co. Ltd. Gyeonggi-do Korea SNF Co. Ltd. Gyeonggi-do Korea Department of Materials Science and Engineering Pusan National University Busan Korea

ISBN: (数字)9798331522001

ISBN: (纸本)9798331522018

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 $(-\text{Ni}, \text{Bi}))$ 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.

关键词： degradation Transmission line matrix methods Printed circuits Thermomechanical processes Electronic packaging thermal management reliability Microstructure Soldering Stress Thermal degradation

来源：评论

学校读者我要写书评

暂无评论

The Effect of Joints on the Performance of Interlocking Block Pavement

SSRN

引用

SSrN 2023年

作者： Kim, Inhyun Oh, Myounghak Hong, Seung-Wan Chung, Choong-Ki Department of Civil and Environmental Engineering Seoul National University Seoul08826 Korea Republic of Daewoo Engineering and Construction Co. LTD Overseas Civil Engineering Team Seoul National University Seoul08826 Korea Republic of Maritime ICT R&D Center Korea Institute of Ocean science & Technology Busan49111 Korea Republic of

Joints play an important role in Interlocking block pavement (IBP) performance because it transfers the load between the blocks, improving the pavement's capacity to disperse loads and resist settlement. Previously, laboratory model tests were performed to determine the appropriate joint width to achieve good load transfer efficiency. The suggested width, however, varies according to the studies because the optimal width is significantly affected by the geotechnical properties of the paving materials, which have been often overlooked and not clearly delineated. Therefore, in this study, repeated loading tests were performed on IBP with varying joint width, considering the geotechnical aspects (mineralogy, grain size distribution, relative density) of the joint and bedding sands. A newly designed 2d chamber that allows particle image velocimetry analysis was used to evaluate the resulted deformation in the sublayers. Test results indicate that narrow and dense joints exhibited greater settlement resistance and load dispersion ability owing to the higher shear resistance at the joints, resulting in the settlement at sublayers to spread over a wide area in a shallow depth. © 2023, The Authors. All rights reserved.

关键词： Pavements

来源：评论

学校读者我要写书评

暂无评论

Statistical Analysis of demonstration Operation for Fuel Cell Vehicle 6

Statistical Analysis of Demonstration Operation for Fuel Cel...

引用

6th International Conference on Transportation Information and Safety, ICTIS 2021

作者： Zhang, dayu Wang, Zhenpo Liu, Peng Sun, Zhenyu Li, Naiwu Wang, Chongwen Beijing Institute of Technology National Engineering Laboratory for Electric Vehicles Beijing100081 China New Energy R&D Center General Technical Management Dept. Line 3: Weichai Power Co. Ltd. Weifang China School of Computer Science & Technology Beijing Institute of Technology Beijing China

ISBN: (纸本)9781665497138

China has continued to support the development of hydrogen energy and fuel cell vehicle technology through National Science and technology projects, and carried out demonstrations and applications of hydrogen energy and fuel cells continuously. relevant departments have cooperated to carry out a series ofprojects to promote the commercial development offuel cell vehicles in China, enabling our country to achieve leapfrog development in terms of the durability, performance, and costs of fuel cell vehicles, and to promote fuel cell vehicles on a large scale. This article is based on the relevant data collected from the National Monitoring and Management center for New Energy Vehicles, which is China's national big data platform for EVs. Conducting detailed statistics and analysis of the market size and operation conditions offuel cell vehicles nationwide, and select the typical city, compare and analyze the operating characteristics of fuel cell vehicles and pure electric vehicles from multiple angles. Providing a solid data supportfor the large-scale promotion offuel cell vehicles, and promoting the commercial development of fuel cell vehicles in China. © 2021 IEEE.

关键词： Fuel cells

来源：评论

学校读者我要写书评

暂无评论

A 280 GHz Quadruple-Push Subharmonic down-Conversion Mixer with Load Impedance Optimization

A 280 GHz Quadruple-Push Subharmonic Down-Conversion Mixer w...

引用

Asia-Pacific Conference on Microwave

作者： Akihito Hirai Yuki Tsukui Shinya Yokomizo ryo Sakamaki Sho Ikeda Information Technology R&D Center Mitsubishi Electric Corporation Kamakura Kanagawa Japan Kamakura Engineering Office Mitsubishi Electric Engineering Co. Ltd. Kamakura Kanagawa Japan Defense & Space Systems Group Mitsubishi Electric Corporation Amagasaki Hyogo Japan National Institute of Advanced Industrial Science and Technology (AIST) Ibaraki Japan

This paper presents the design and fabrication of a 280 GHz quadruple-push subharmonic down-conversion mixer with optimized load impedance using a 45nm CMOS-SOI. A mixer-first architecture is widely used in sub-THz band receivers because of the difficulty of achieving high gain and low NF in low noise amplifiers. Moreover, in sub-THz band mixers, the 4th harmonic mixer is utilized to reduce the chip area and the power consumption by reducing the local oscillator frequency. The proposed 4th harmonic down-conversion mixer uses the ANd-gate switching topology for the mixer core and load impedance optimization to prevent degradation of the conversion gain. The proposed mixer achieved the measured conversion gain of −21.9 dB with a small chip area of 0.09 mm 2 by eliminating the bandpass filter.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Flow-through in-situ evaporation membrane enabled self-heated membrane distillation for efficient desalination of hypersaline water

引用

Chemical engineering Journal 2023年第Part2期452卷

作者： Subrahmanya, T.M. Widakdo, Januar Austria, Hannah Faye M. Hung, Wei-Song Kurkuri, Mahaveer d. Wang, Chih-Feng Hu, Chien-Chieh Lee, Kueir-rarn Lai, Juin-Yih Advanced Membrane Materials Research Center Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Jain Global Campus Karnataka Bengaluru562112 India R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan

Water crisis and high salinity water treatment are growing challenges for the world. The recently emerged self-heating or surface heating membrane distillation (Md) can be a promising way to obtain fresh water from saline and other wastewater sources. However, its inherent drawbacks such as intolerance to high feed flow rate, low flux, and loss of heat energy through bulk feed stream, limit its realistic applications. Herein, we successfully demonstrate a novel trilayered flow-through in-situ evaporation membrane (FTIEM) enabled membrane distillation process. The PEI-PdA-SBA-15 is spray coated as a top layer of FTIEM, which functions as hydrating, salt screening and thermally insulating layer, thus, it prevents the loss of heat from the middle joule heating layer (i.e., COOH-MWCNTs-PVA layer, where the water evaporation occurs) to the bulk feed stream, while the bottom PVdF microporous membrane permits only vapor to pass through under an appropriate vacuum pressure. The power required for membrane heating is provided by using a d.C. supply. during Md desalination of sea water, the FTIEMs achieve the lowest specific heating energy of 0.024 KWhL−1. In addition, the FTIEMs upon long –term Md operation using hypersaline water as feed, exhibit excellent stability and performance with maximum flux and salt rejection of 29.25 Lm−2h−1 and 99.99 % respectively. Our findings may encourage the development of FTIEMs for desalination of hypersaline water. © 2022 Elsevier B.V.

关键词： desalination

来源：评论

学校读者我要写书评

暂无评论

A Nonresonant Hybridized Electromagnetic-Triboelectric Nanogenerator for Irregular and Ultralow Frequency Blue Energy Harvesting

引用

research 2021年第1期2021卷 304-315页

作者： Weibo Xie Lingxiao Gao Lingke Wu Xin Chen Fayang Wang daqiao Tong Jian Zhang Jianyu Lan Xiaobin He Xiaojing Mu Ya Yang State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China Key Laboratory of Optoelectronic Technology&Systems Ministry of Education International R&D Center of Micro-Nano Systems and New Materials TechnologyChongqing UniversityChongqing 400044China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China College of Aerospace Engineering Chongqing UniversityChongqing 400044China Shanghai Academy of Spaceflight Technology Shanghai Institute of Space Power SourceShanghai 200245China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanningGuangxi 530004China

As a promising renewable energy source,it is a challenging task to obtain blue energy,which is irregular and has an ultralow frequency,due to the limitation of ***,a nonresonant hybridized electromagnetic-triboelectric nanogenerator was presented to efficiently obtain the ultralow frequency *** instrument adopted the flexible pendulum structure with a precise design and combined the working principle of electromagnetism and triboelectricity to realize the all-directional vibration energy acquisition *** results confirmed that the triboelectric nanogenerator(TENG)had the potential to deliver the maximum power point of about 470μW while the electromagnetic nanogenerator(EMG)can provide 523 mW at *** conversion efficiency of energy of the system reached 48.48%,which exhibited a remarkable improvement by about 2.96 times,due to the elastic buffering effect of the TENG with the double helix ***,its ability to collect low frequency wave energy was successfully proven by a buoy in Jialing *** woke provides an effective candidate to harvest irregular and ultralow frequency blue energy on a large scale.

关键词： generator precise instrument

来源：评论

学校读者我要写书评

暂无评论

Fabrication of High-Flux defect-Free Hollow Fiber Membranes derived from a Phenolphthalein-Based Copolyimide for Gas Separation

SSRN

引用

SSrN 2023年

作者： Chen, Bo Zhao, Guoke Lau, Cher Hon Wang, Fuwei Fan, Shuxin Niu, Chuang ren, Zhongzheng Tang, Gongqing Liu, Yiqun Qin, Peiyong Li, Pei College of Materials Science and Engineering Beijing University of Chemical Technology Beijing100029 China SINOPEC Beijing Research Institute of Chemical Industry Beijing100013 China Institute for Materials and Processes School of Engineering University of Edinburgh United Kingdom National Energy R&D Center for Biorefinery Tsinghua University China

In the realm of gas purifications, hollow fiber membranes have gained significant prominence due to their unique advantages. However, achieving defect-free membranes poses a considerable challenge. In this study, we addressed this challenge with a novel copolymer, 6FdA-dAM:dAP(2:1), comprising 4,4’-(hexafluoroisopropylidene) diphthalic anhydride (6FdA), 2,4.6-Trimethy-m-phenylenediamine (dAM), and a phenolphthalein-derived diamine of 3,3’-diaminophenolphthalein (dAP). We found that defect-free hollow fiber membranes could be prepared when 20 wt.% or more ethanol was added in the polymer dope solution, but this led to the formation of oval hollow fibers that would be flattened under high pressure. We solved this limitation by lowering ethanol content to 15 wt. %, adding 2 wt. % LiNO3, and increasing the air-gap distance. These measures reduced the difference in phase inversion rates between the surface region and the bulk phase of the nascent hollow fiber. The CO2 permeance of this defect-free hollow fiber membrane reached 282 GPU with a CO2/CH4 selectivity of 50.2. Highly permeable defective hollow fiber membranes were also developed using a polymer dope without LiNO3 and a low THF content of 5 wt.%. After coated by silicone rubber, the CO2 permeance of the membrane reached 554 GPU with a CO2/CH4 selectivity of 45.0. In mixed gas tests, the two membranes exhibited O2 permeances of approximately 43.3 and 75.3 GPU, with O2/N2 selectivities of 5.5 and 5.4, respectively. Their CO2 permeances were 281 and 465 GPU, with CO2/CH4 selectivities of 45 and 41, CO2/N2 selectivities of 35.7 and 33.3, respectively. These separation performances out-performed state-of-art polymeric hollow fiber membranes and demonstrated great potential for gas separation applications such as natural gas sweetening, flue gas treatment, and air separation. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：