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交叉学科背景下学生实验方案设计能力培养——以双狭缝喷嘴射流冲击平板实验平台设计为例

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实验技术与管理 2024年第7期41卷 148-153页

作者：吴里程康灿刘海霞刘栋江苏大学能源与动力工程学院江苏镇江212013 江苏大学能源与动力工程国家级实验教学示范中心江苏镇江212013 江苏大学材料科学与工程学院江苏镇江212013

该文将能源与动力工程专业和材料成型及控制工程专业的知识点相结合,融入新工科理念,指导学生设计双狭缝喷嘴射流冲击平板实验平台。该平台集对流换热、流动、薄板热处理、数据采集等知识为一体,可加深学生对交叉学科知识和复杂工程问... 详细信息

该文将能源与动力工程专业和材料成型及控制工程专业的知识点相结合,融入新工科理念,指导学生设计双狭缝喷嘴射流冲击平板实验平台。该平台集对流换热、流动、薄板热处理、数据采集等知识为一体,可加深学生对交叉学科知识和复杂工程问题的理解,由实验平台设计与优化可提高学生综合实验方案设计能力,培养创新意识。

关键词：交叉学科综合型实验设计能力测控系统

A modified YOLOv4 detection method for a vision-based underwater garbage cleaning robot

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Frontiers of Information Technology & Electronic Engineering 2022年第8期23卷 1217-1228页

作者： Manjun TIAN Xiali LI Shihan KONG licheng wu Junzhi YU First Research Institute of the Ministry of Public Security of PRC Beijing 100048China School of Information Engineering Minzu University of ChinaBeijing 100081China Department of Advanced Manufacturing and Robotics College of EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China

To tackle the problem of aquatic environment pollution,a vision-based autonomous underwater garbage cleaning robot has been developed in our *** propose a garbage detection method based on a modified YOLOv4,allowing high-speed and high-precision object ***,the YOLOv4 algorithm is chosen as a basic neural network framework to perform object *** the purpose of further improvement on the detection accuracy,YOLOv4 is transformed into a four-scale detection *** improve the detection speed,model pruning is applied to the new *** virtue of the improved detection methods,the robot can collect garbage *** detection speed is up to 66.67 frames/s with a mean average precision(mAP)of 95.099%,and experimental results demonstrate that both the detection speed and the accuracy of the improved YOLOv4 are excellent.

关键词： Object detection Aquatic environment Garbage cleaning robot Modified YOLOv4

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虚拟仿真在能源动力类专业实验教学中的应用

实验室科学 2024年第2期27卷 133-137页

作者：张永超康灿吴里程江苏大学能源与动力工程学院江苏镇江212013

以能源与动力工程专业本科教学专业核心课程中的重点内容—空化现象为例,介绍了江苏大学能源与动力工程学院在“新工科”背景下利用虚拟仿真平台进行能源与动力工程专业本科生实验教学改革的情况。课程基于虚拟仿真实验平台技术实现空... 详细信息

以能源与动力工程专业本科教学专业核心课程中的重点内容—空化现象为例,介绍了江苏大学能源与动力工程学院在“新工科”背景下利用虚拟仿真平台进行能源与动力工程专业本科生实验教学改革的情况。课程基于虚拟仿真实验平台技术实现空化现象的可视化与控制,以泵为载体,使学生在理解空化现象的基础上,掌握泵的空化性能与运行特性;掌握空化实验平台的具体操作步骤,学习数据采集与分析方法。可以达到传授专业核心知识、解释复杂现象、启发专业思维的教学目的。

关键词：虚拟仿真能源与动力工程空化现象实验教学能力培养

Boosting low-temperature selective catalytic reduction of NO_(x)with NH_(3)of V_(2)O_(5)/TiO_(2)catalyst via B-doping

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Chinese Journal of Chemical Engineering 2022年第4期35卷 377-383页

作者： Hanghang Li Wei Zhao licheng wu Qian Wang Danhong Shang Qin Zhong School of Energy&Power Engineering Jiangsu UniversityZhenjiang 212013China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China

A series of B-doped V_(2)O_(5)/TiO_(2) catalysts has been prepared the by sol-gel and impregnation methods to investigate the influence of B-doping on the selective catalytic reduction(SCR)of NOxwith NH_(3).X-ray diffraction,Brunauer-Emmett-Teller specific surface area,scanning electron microscope,X-ray photoelectron spectroscopy,temperature-programmed reduction of H_(2) and temperature-programmed desorption of NH_(3)technology were used to study the effect of the B-doping on the structure and NH_(3)-SCR activity of V_(2)O_(5)/TiO_(2) *** experimental results demonstrated that the introduction of B not only improved the low-temperature SCR activity of the catalysts,but also broadened the activity temperature *** best SCR activity in the entire test temperature range is obtained for VTiB_(2.0) with 2.0%doping amount of B and the NO_(x) conversion rate is up to 94.3%at 210℃.The crystal phase,specific surface area,valence state reducibility and surface acidity of the active components for the as-prepared catalysts are significantly affected by the B-doping,resulting in an improved NH_(3)-SCR *** results suggest that the V_(2)O_(5)/TiO_(2) catalysts with an appropriate B content afford good candidates for SCR in the low temperature window.

关键词： B-doping Catalyst SCR NO_(x) Support

咳嗽1号方辅助治疗儿童肺炎支原体肺炎痰热闭肺证的临床疗效观察及对血清IL-6、TNF-α的影响

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中国中医药科技 2024年第3期31卷 446-449页

作者：吴莉城杨亭亭邵征洋浙江省杭州市富阳区中医院儿科浙江杭州311400 浙江省中西医结合医院儿科浙江杭州310003

目的:观察咳嗽1号方治疗儿童肺炎支原体肺炎的临床疗效及对血清炎性因子IL-6、TNF-α的影响。方法:选取肺炎支原体肺炎痰热闭肺证患儿80例,随机分为观察组和对照组。对照组予阿奇霉素治疗。观察组阿奇霉素加用咳嗽1号方治疗。疗程结束... 详细信息

目的:观察咳嗽1号方治疗儿童肺炎支原体肺炎的临床疗效及对血清炎性因子IL-6、TNF-α的影响。方法:选取肺炎支原体肺炎痰热闭肺证患儿80例,随机分为观察组和对照组。对照组予阿奇霉素治疗。观察组阿奇霉素加用咳嗽1号方治疗。疗程结束后比较2组有效率,主要症状及肺部体征消失的时间,ELISA检测治疗前后2组患儿血清IL-6、TNF-α水平,记录2组患儿不良反应。结果:观察组总有效率为90.0%,高于对照组的75.0%(P<0.05);观察组主要症状及肺部体征消失时间均较对照组缩短(P<0.05);2组治疗后血清IL-6、TNF-a水平均较治疗前下降(P<0.05),且观察组下降更显著(P<0.05)。结论:咳嗽1号方联合阿奇霉素治疗痰热闭肺证儿童肺炎支原体肺炎临床疗效更佳,并可下调血清IL-6及TNF-α水平。

关键词：儿童肺炎支原体肺炎咳嗽1号方痰热闭肺证白介素-6 肿瘤坏死因子-α

Cross-Language Transfer Learning-based Lhasa-Tibetan Speech Recognition

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Computers, Materials & Continua 2022年第10期73卷 629-639页

作者： Zhijie Wang Yue Zhao licheng wu Xiaojun Bi Zhuoma Dawa Qiang Ji School of Information Engineering Minzu University of ChinaBeijing100081China School of Chinese Ethnic Minority Languages and Literatures Minzu University of ChinaBeijing100081China Department of Electrical Computerand Systems EngineeringRensselaer Polytechnic InstituteTroyNY 12180-3590USA

As one of Chinese minority languages,Tibetan speech recognition technology was not researched upon as extensively as Chinese and English were until ***,along with the relatively small Tibetan corpus,has resulted in an unsatisfying performance of Tibetan speech recognition based on an end-to-end *** paper aims to achieve an accurate Tibetan speech recognition using a small amount of Tibetan training *** demonstrate effective methods of Tibetan end-to-end speech recognition via cross-language transfer learning from three aspects:modeling unit selection,transfer learning method,and source language *** results show that the Chinese-Tibetan multi-language learning method using multilanguage character set as the modeling unit yields the best performance on Tibetan Character Error Rate(CER)at 27.3%,which is reduced by 26.1%compared to the language-specific *** our method also achieves the 2.2%higher accuracy using less amount of data compared with the method using Tibetan multi-dialect transfer learning under the same model structure and data set.

关键词： Cross-language transfer learning low-resource language modeling unit Tibetan speech recognition

Combination Mechanism and Enhanced Visible-Light Photocatalytic Activity and Stability of CdS/g-C3N4 Heterojunctions

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Journal of Materials Science & Technology 2017年第1期33卷 30-38页

作者： Huanyan Xu licheng wu Liguo Jin Kejia wu School of Materials Science and Engineering Harbin University of Science and Technology Harbin 150040 China

In this study, CdS/g-C3N4 （CSCN） heterojunctions were in situ fabricated with a large amount of CdS nanoparticles anchored on g-C3N4 nanosheets, A wet chemical method was developed for the first time to determine the actual content of CdS in CSCN composites. X-ray diffraction （XRD）, Fourier transform infrared spectra （FFIR）, high-resolution transmission electron microscopy （HRTEM） and UV-vis diffuse reflectance spectra （DRS） were employed to characterize the composition, structure and optical prop- erty of CSCN composites. Based on the is0electric point （liP） analysis of g-C3N4, a conclusion was obtained on the combination mechanism between CdS nanoparticles and g-C3N4 nanosheets. The photocatalytic activity of CSCN composites was much better than those of individual CdS and g-C3N4 for the degrada- tion of azo dye Methyl Orange （MO） by 40 min adsorption in the dark followed by 15 min photocatalysis under visible light irradiation. After 5 cycles, CSCN composites still maintained high reactive activity with the MO degradation efficiency of 93.8%, exhibiting good photocatalytic stability. The Cd2~ concentration dissolved in the supernatant detected by atomic absorption spectroscopy （AAS） of CSCN composites was lower than that of pure CdS, implying that the photocorrosion of CdS could be suppressed via the combination with g-C3N4. Photoluminescence emission spectra （PL） results clearly revealed that the recombination of photogenerated electron-hole pairs in CSCN composites was effectively inhibited due to the formation of heterojunctions. Based on the band alignments of g-C3N4 and CdS, the possible photocatalvtic mechnism was discussed.

关键词： CdS/g-C3N4 Heterojunctions Photocatalytic stability Photocatalytic mechanism

Adsorption of acid fuchsin onto LTA-type zeolite derived from fly ash

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Science China(Technological Sciences) 2014年第6期57卷 1127-1134页

作者： XU HuanYan wu licheng SHI TianNuo LIU WeiChao QI ShuYan School of Materials Science and Engineering Harbin University of Science and Technology

A facile strategy without organic template was developed for the conversion of fly ash to LTA-type zeolite(LTA-Z),which could be used as a good adsorbent for the removal of acid fuchsin(AF).XRD results indicated that the pure crystalline product was obtained with the structure of LTA-type *** investigations showed that the well-defined LTA-Z crystals exhibited uniform size with the same cubic *** maximum AF adsorption amount was observed at pH=5,slightly lower than pHPZC of *** temperature favored AF adsorption onto LTA-Z and it was an endothermic ***,AF adsorption amount increased with initial AF concentration increasing and LTA-Z dosage *** sorption governed this process at the initial 120 min period,followed by the internal diffusion of AF molecules between porous *** Langmuir model was determined as the adsorption isothermal,suggesting that the monolayer coverage of AF on LTA-Z surface was involved.

关键词： A型沸石酸性品红吸附剂 Langmuir模型粉煤灰自动对焦 XRD分析有机模板

Global correlation for strontium isotope curve in the Late Cretaceous of Tibet and dating marine sediments

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Science China Earth Sciences 2005年第2期48卷 199-209页

作者： HUANG Sijing SHI He SHEN licheng ZHANG Meng wu Wenhui State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation College of GeoscienceChengdu University of TechnologyChengdu610059China State Key Laboratory of Oil/Gas Reservoir Geology and ExploitationCollege of GeoscienceChengdu University of TechnologyChengdu610059China State Key Laboratory of Oil/Gas Reservoir Geology and ExploitationCollege of GeoscienceChengdu University of TechnologyChengdu610059China State Key Laboratory of Oil/Gas Reservoir Geology and ExploitationCollege of GeoscienceChengdu University of TechnologyChengdu610059China State Key Laboratory of Oil/Gas Reservoir Geology and ExploitationCollege of GeoscienceChengdu University of TechnologyChengdu610059China

87Sr/86Sr ratios of marine carbonate samples collected from a sedimentary section of the Late Cretaceous in the south of Tibet were measured. Based on the absence of cathodoluminescence and a very low Mn/Sr ratio (average 0.06) of the samples, it is thought that they contain information on the original seawater strontium isotope composition. The strontium isotope evolution curve of the Late Cretaceous in Tibet we established here, is consistent with other coeval curves from Europe, North America and Antarctica, supports the notion that the strontium isotope composition of seawater is governed by global events, which provides a new approach for the inter-continental and inter-basinal correlations of Late Cretaceous in the area and is a complementarity for biostratigraphy. In addition, we attempt to determine the age of the boundaries for Campanian/Santonian and Maastrichtian/Campanian by 87Sr/86Sr ratios for Gamba section in southern Tibet. The two boundaries are located in the thickness of 217 m (83.5 Ma) and 291 m (71.3 Ma), respectively.

关键词： southern Tibet, Late Cretaceous marine carbonate, strontium isotope, global correlation, dating marinesediments.