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Study on aerosol agglomeration using the airborne ultrasonic transducer

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Particuology 2023年第11期82卷 157-165页

作者： Yuxin Guo Guangxue Zhang Yunchao Li Hailin Gu Dingkun Yuan maosheng liu The Institute for Energy Engineering China Jiliang UniversityHangzhou310000China

Acoustic agglomeration technology use high-intensity acoustic field to make aerosol particles collide and condense rapidly. Existing studies have shown that 70%–90% of fine particles can be eliminated within minutes using compression drives and air-jet generators. Currently, there are limitations to the sound sources used. In this paper, an airborne ultrasonic transducer with a resonant frequency of 15 kHz is designed, followed by the corresponding numerical simulation and experiments for the evaluation of the vibration modal and sound pressure field. The sound pressure levels (SPL) of the open space and the agglomeration chamber can reach 150 dB and 156 dB, respectively. The agglomeration effect of water droplets, liquid phase smoke, solid phase smoke and mixed smoke is experimentally investigated, and the light transmittance rapidly increases from 8% to 60% within 4 s, 8 s, 5 s and 6 s, respectively. Agglomeration is also effective in the high-frequency range, and we infer that the acoustic wake effect is the predominant mechanism. The elimination effect is promoted with the increasing of SPL until the corresponding secondary acoustic effect is enhanced. Moreover, the agglomeration rate of higher concentration aerosol is significantly better than that of diluted aerosols in ultrasonic agglomeration process.

关键词： Acoustic agglomeration Airborne ultrasonic transducer Aerosol Sound pressure level Initial concentration

Assessment of heavy metal pollution in Laizhou Bay(China)using the ecological risk index and the integrated biomarker response of the goby Acanthogobius ommaturus

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Journal of Oceanology and Limnology 2023年第4期41卷 1519-1536页

作者： maosheng liu Hua XU Qiang ZOU Fei FANG Shan SUN Yuting ZHAO Xin HE Yonghui BO Lei YAO Yan FANG School of Agriculture Ludong UniversityYantai 264025China Yantai Ecological Environment Monitoring Center Yantai 264010China Yantai Branch of Shandong Technology Transfer Center Chinese Academy of SciencesYantai 264003China Shandong Provincial Key Laboratory of Restoration for Marine Ecology Shandong Marine Resource and Environment Research InstituteYantai 264006China

We used the Integrated Biological Responses version 2(IBRv2)method to evaluate the biological eff ects of heavy metals in the sediments in Laizhou Bay,China on the benthic goby Acanthogobius ommaturus.In December 2018,gobies and sediments were collected from 15 stations.We measured the activities of defense enzymes and the contents of malondialdehyde(MDA)and metallothionein(MT)in the goby liver as well as the levels of heavy metals in the sediments and goby muscle tissue.Most of the heavy metal concentrations in sediment at each station were below the Class I criteria set by Chinese Standards for Marine Sediment Quality,and the Håkanson ecological risk index suggested low risk for the heavy metals.We found that A.ommaturus could eff ectively accumulate mercury,cadmium,arsenic,and zinc and that the contents of MT and MDA and the activities of glutathione peroxidase and glutathione reductase were suitable biomarkers of heavy metal pollution in this species.The IBRv2 method integrated these four biomarkers and discriminated stations according to heavy metal pollution.Higher IBRv2 values suggested more adverse eff ects in gobies,corroborating more serious heavy metal contamination.The stations with high IBRv2 values and high contents of heavy metals were mainly distributed in the west and northeast parts of the bay.These results show that the IBRv2 approach is a feasible strategy for assessing heavy metal pollution through biological response and biological status and that it can be implemented for environmental monitoring in Laizhou Bay.

关键词： integrated biomarker responses heavy metal assessment goby Acanthogobius ommaturus Laizhou Bay

Electrically driven single microwire-based single-mode microlaser

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Light(Science & Applications) 2022年第8期11卷 1799-1810页

作者： Xiangbo Zhou Mingming Jiang Kai Xu maosheng liu Shulin Sha Shuiyan Cao Caixia Kan Da Ning Shi College of Physics MIIT Key Laboratory of Aerospace Information Materials and PhysicsKey Laboratory for Intelligent Nano Materials and DevicesNanjing University of Aeronautics and AstronauticsNo.29 Jiangjun RoadNanjing211106China

Engineering the lasing-mode oscillations effectively within a laser cavity is a relatively updated attentive study and perplexing issue in the field of laser physics and applications. Herein, we report a realization of electrically driven single-mode microlaser, which is composed of gallium incorporated zinc oxide microwire (ZnO:Ga MW) with platinum nanoparticles (PtNPs, d ~ 130 nm) covering, a magnesium oxide (MgO) nanofilm, a Pt nanofilm, and a p-type GaN substrate. The laser cavity modes could resonate following the whispering-gallery mode (WGM) among the six side surfaces by total internal reflection, and the single-mode lasing wavelength is centered at 390.5 nm with a linewidth of about 0.18 nm. The cavity quality factor Q is evaluated to about 2169. In the laser structure, the usage of Pt and MgO buffer layers can be utilized to engineer the band alignment of ZnO:Ga/GaN heterojunction, optimize the p-n junction quality and increase the current injection. Thus, the well-designed device structure can seamlessly unite the electron-hole recombination region, the gain medium, and optical microresonator into the PtNPs@ZnO:Ga wire perfectly. Such a single MW microlaser is essentially single-mode regardless of the gain spectral bandwidth. To study the single-mode operation, PtNPs working as superabsorber can engineering the multimode lasing actions of ZnO:Ga MWs even if their dimensions are typically much larger than that of lasing wavelength. Our findings can provide a straightforward and effective scheme to develop single-mode microlaser devices based on one-dimensional wire semiconductors.

关键词： mode lasing cavity

《再见,哥伦布》中的“矛盾共鸣”及其伦理启示

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江西师范大学学报（哲学社会科学版） 2024年第1期57卷 139-144页

作者：赖日升刘茂生广东外语外贸大学英语语言文化学院广州广东510420

《再见,哥伦布》是犹太裔美国作家菲利普·罗斯的第一部作品。罗斯通过犹太裔情侣尼尔和布伦达的失败恋情揭露了20世纪50年代美国犹太居民生活中存在“矛盾的共鸣之音”,两人分手的背后隐藏着深刻的伦理必然:尼尔所代表的年轻一代犹太... 详细信息

《再见,哥伦布》是犹太裔美国作家菲利普·罗斯的第一部作品。罗斯通过犹太裔情侣尼尔和布伦达的失败恋情揭露了20世纪50年代美国犹太居民生活中存在“矛盾的共鸣之音”,两人分手的背后隐藏着深刻的伦理必然:尼尔所代表的年轻一代犹太知识分子阶层,虽然对犹太传统道德存在诸多看法,但仍认为秉持道德传统是在美国安身立命的基础;布伦达所代表的犹太富裕阶层,则选择完全放弃犹太身份及其相应的道德传统。罗斯通过尼尔与布伦达在恋爱过程中各自做出的伦理选择,表达了自己对保持少数族裔身份问题的伦理思考。

关键词：《再见,哥伦布》伦理选择伦理身份 “矛盾共鸣” 伦理启示

叙事之艺与伦理之思的有机交融——《麦克尤恩的小说创作及其伦理价值研究》述评

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山东外语教学 2024年第3期45卷 129-133页

作者：朱慧敏刘茂生广东外语外贸大学英语语言文化学院广东广州510420

尚必武教授于2023年出版的新著《麦克尤恩的小说创作及其伦理价值研究》深入探讨了英国作家伊恩·麦克尤恩的小说创作,聚焦于作品所呈现的叙事特色和伦理主题,是麦克尤恩研究的重要成果。该著作挖掘了麦克尤恩作品隐含在叙事艺术背后的... 详细信息

尚必武教授于2023年出版的新著《麦克尤恩的小说创作及其伦理价值研究》深入探讨了英国作家伊恩·麦克尤恩的小说创作,聚焦于作品所呈现的叙事特色和伦理主题,是麦克尤恩研究的重要成果。该著作挖掘了麦克尤恩作品隐含在叙事艺术背后的伦理内核,剖析了小说中的伦理问题和伦理困境。尚必武教授细致解读麦克尤恩作品,关注被学界所忽视的伦理关切,呈现其中的伦理诉求。该著极具学术深度,特色鲜明,表达了中国本土视角下的研究立场,实现了中外研究平等对话,是理解麦克尤恩作品、推动中外文学研究交流与互动的力作。

关键词：伊恩·麦克尤恩小说创作叙事艺术伦理思想伦理价值

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超声消除电缆火灾烟雾的实验研究

声学技术 2024年第1期43卷 55-62页

作者：郭玉鑫张光学刘茂省顾海林中国计量大学能源工程研究所浙江杭州310018

声波团聚技术是利用高强声场的作用使颗粒物发生相对运动从而碰撞并凝聚,大幅减少悬浮的颗粒物。当今城市地下电缆一旦发生火灾将造成巨大的生命及财产损失。在火场应用声波团聚技术能够大幅提高火场的能见度,有助于人员逃生。文章研究... 详细信息

声波团聚技术是利用高强声场的作用使颗粒物发生相对运动从而碰撞并凝聚,大幅减少悬浮的颗粒物。当今城市地下电缆一旦发生火灾将造成巨大的生命及财产损失。在火场应用声波团聚技术能够大幅提高火场的能见度,有助于人员逃生。文章研究了超声场下消除地下电缆火灾烟雾的效果。首先设计了一款频率为18 kHz的气介式换能器,并对其进行模态分析;随后加工了声源,测试其发声效果。结果表明,换能器在开放空间及团聚室内声压级最高分别可达154.1 dB及158.7 dB。开放空间下输入功率越高、越靠近圆盘中心,声压级越高;团聚室内中间监测点处由于壁面及底部反射作用声压级最高。团聚实验结果表明,在声压级为155 dB、初始透光率为8%时,对于液相烟雾及电缆烟雾,分别在5、15 s内透光率达到60%,这表明在超声场下,团聚效果显著,且团聚效果随声压级的增大而增大。

关键词：超声换能器声波团聚声压级透光率火灾烟雾

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中外戏剧经典的生成与跨文化传播

贵州大学学报（艺术版） 2024年第3期38卷 71-77,F0003页

作者：刘茂生朱慧敏广东外语外贸大学英语语言文化学院广东广州510420

文学经典的生成与发展有其独特的方式与路径,戏剧更有其经典生成与发展过程中观众、舞台、展演等独特元素的参与。文学经典的生成需要经过漫长的理解与阐释的历程,戏剧因其特殊的演示方式而具有可以跨越语言障碍的交流与传播方式。从人... 详细信息

文学经典的生成与发展有其独特的方式与路径,戏剧更有其经典生成与发展过程中观众、舞台、展演等独特元素的参与。文学经典的生成需要经过漫长的理解与阐释的历程,戏剧因其特殊的演示方式而具有可以跨越语言障碍的交流与传播方式。从人学转向、审美与伦理内涵,跨文化阐释与传播分析,可以助力中外戏剧交流与互动,丰富世界文学文化研究。

关键词：中外戏剧经典生成与发展 “人学转向” 审美与伦理跨文化阐释与传播

STUDY　ON　TREATMENT　OF　AMMONIA　LEACHING　SLAG　IN　THE　METALLURGICAL　PROCESS　OF　TUNGSTEN

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Journal of Central South University 1995年第2期7卷 21-26页

作者： Peimen Sun Honggui Li Yunjiao Li maosheng liu Pengtuan Su Zhiquan Wei Detai Jian 1. Department of Nonferrous Metallurgy Central South University of Technology 410083 Changsha China 2. Zigong Cemented Carbide Plant China

The research of recovering WO3 from ammonia leaching slag in the extractive process of tungsten has been performed. The results show that the mechanically activated decomposition with Na2CO3 for ammonia leaching slag... 详细信息

关键词： ammonia leaching slag mechanically activated decomposition sodium carbnate leaching efficiency

Multifunctional WSe_(2)/Co_(3)C composite for efficient electromagnetic absorption, EMI shielding, and energy conversion

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Nano Research 2024年第3期17卷 1655-1665页

作者： Yuhang Zhu Tingting liu Lin Li maosheng Cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics&Electron EngineeringHarbin Normal UniversityHarbin 150025China

Currently,as the electromagnetic(EM)environment becomes increasingly complex,single-function EM materials can hardly resist the increasing electromagnetic interference(EMI),and there is an urgent need to develop multifunctional EM materials.In this work,multifunctional WSe_(2)/Co_(3)C was prepared by simple hydrothermal methods.Its dielectric performance and EM response were investigated.Efficient absorption,shielding performance,and energy conversion devices were customized.By tailoring the loading content,WSe_(2)/Co_(3)C can switch between EM absorption and EMI shielding.The maximum shielding effectiveness(SE)of WSe_(2)/Co_(3)C reached 36 dB,and high reflection loss(RL)of-60.28 dB and wide effective absorption bandwidth(EAB)of 6.16 GHz can be obtained at low thickness.The multiple EM attenuation mechanisms brought by the combination of two-dimensional(2D)WSe_(2) and magnetic Co_(3)C are considered to be the main reason for the enhanced EM attenuation ability.The WSe_(2)/Co_(3)C composite provides a viable candidate for developing multifunctional EM materials in 2–18 GHz.

关键词： WSe_(2) Co_(3)C electromagnetic property microwave absorption electromagnetic interference shielding energy conversion