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Chemical Research in Chinese Universities 2024年第1期40卷 36-46页

作者： YANG Yinze ZHANG Liyan zhou Leilei CHENG Haiyang ZHAO fengyu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China School of Applied Chemistry and Engineering University of Science Technology of ChinaHefei 230026P.R.China Jilin Province Key Laboratory of Green Chemistry and Process Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China

The reductive amination of furfural to furfurylamine is an important and still challenging topic in the field of biomass conversion. In this work, we prepared a series of Ni/Al_(2)O_(3)-LaO_(x) catalysts by co-precipitation method, the role of La played in promoting the catalytic performances of reductive amination furfural was discussed based on the changes in the electronic state of Ni species, acidity, and Ni particle size. The catalytic activity and the selectivity of furfurylamine are highly dependent on the surface properties and the structure of the catalyst. The addition of La promoted the amount of strong acidic sites and the H2dissociation and spillover on the surface, thus inducing the improvement of the catalytic activity and furfurylamine selectivity. The Ni/Al_(2)O_(3)-0.5LaO_(x)catalyst with suitable acid sites gave a high yield of furfurylamine (94.9%) under mild reaction conditions. Moreover, the catalyst could be recycled five times without significant loss in activity. The Ni/Al_(2)O_(3)-LaO_(x) catalyst is of great promise in the production of amines via reductive amination reaction.

关键词： Reductive amination Furfural Nickel catalyst Furfurylamine Lanthanum

Low-temperature NH_(3)-SCR performance of a novel Chlorella@Mn composite denitrification catalyst

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Journal of Environmental Sciences 2024年第3期137卷 271-286页

作者： Hengheng Liu fengyu Gao Songjin Ko Ning Luo Xiaolong Tang Erhong Duan Honghong Yi Yuansong zhou School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing 100083China School of Environmental Science and Engineering University of Science and Technology HebeiHebei 050018China Department of Chemistry Pyongyang University of ArchitecturePyongyangDemocratic People’s Republic of Korea

The synthesis process of conventional Mn-based denitrification catalysts is relatively complex and expensive.In this paper,a resource application of chlorella was proposed,and a Chlorella@Mn composite denitrification catalyst was innovatively synthesized by electrostatic interaction.The Chlorella@Mn composite denitrification catalyst prepared under the optimal conditions(0.54 g/L Mn^(2+)concentration,20 million chlorellas/mL concentration,450℃ calcination temperature)exhibited a well-developed pore structure and large specific surface area(122 m^(2)/g).Compared with MnOx alone,the Chlorella@Mn composite catalyst achieved superior performance,with~100%NH_(3)selective catalytic reduction(NH_(3)-SCR)denitrification activity at 100-225℃.The results of NH_(3)temperature-programmed desorption(NH_(3)-TPD)and H_(2)temperature-programmed reduction(H_(2)-TPR)showed that the catalyst had strong acid sites and good redox properties.Zeta potential testing showed that the electronegativity of the chlorella cell surface could be used to enrich with Mn^(2+).X-ray photoelectron spectroscopy(XPS)confirmed that Chlorella@Mn had a high content of Mn^(3+)and surface chemisorbed oxygen.In-situ diffuse refectance infrared Fourier transform spectroscopy(in-situ DRIFTS)experimental results showed that both Langmuir-Hinshelwood(L-H)and Eley-Rideal(E-R)mechanisms play a role in the denitrification process on the surface of the Chlorella@Mn catalyst,where the main intermediate nitrate species is monodentate nitrite.The presence of SO_(2)promoted the generation and strengthening of Bronsted acid sites,but also generated more sulfate species on the surface,thereby reducing the denitrification activity of the Chlorella@Mn catalyst.The Chlorella@Mn composite catalyst had the characteristics of short preparation time,simple process and low cost,making it promising for industrial application.

关键词： Chlorella@Mn catalyst NH_(3)-SCR Poisoning resistance Reaction mechanism Infuence of SO_(2)

CdS nanoparticles decorated hexagonal Fe_(2)O_(3) nanosheets with a Z-scheme photogenerated electron transfer path for improved visible-light photocatalytic hydrogen production

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Chinese Journal of Chemical Engineering 2022年第3期35卷 266-274页

作者： Feng Guo Haoran Sun Yuxing Shi fengyu zhou Weilong Shi School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Photocatalytic water splitting for hydrogen production(H_(2))is one of the main potential applications of photocatalytic technology,which can use solar energy as the energy required for chemical reactions to alleviate the energy crisis.In this work,zero-dimensional/two-dimensional(0D/2D)contact surface CdS/α-Fe_(2)O_(3)(CF)heterojunction photocatalyst was synthesized via a simple solvothermal method.Photocatalytic hydrogen production experiments revealed that the CF-15 sample shows the optimal photocatalytic H_(2)rate(1806μmol·h^(-1)·g^(-1))and apparent quantum efficiency(AQE=13.7%atλ=420 nm).The enhancement of photocatalytic performance is mainly attributed to the contact of 0D/2D interface and the synergistic effect of Z-scheme electron transfer mechanism.This work provides an effective way for modified composite semiconductor photocatalyst by constructing special interface heterojunction to achieve highly efficiently catalysis.

关键词： Photocatalysis Hydrogen production 0D/2D CdS α-Fe_(2)O_(3) Z-scheme

Hyper-Heuristic Task Scheduling Algorithm Based on Reinforcement Learning in Cloud Computing

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Intelligent Automation & Soft Computing 2023年第8期37卷 1587-1608页

作者： Lei Yin Chang Sun Ming Gao Yadong Fang Ming Li fengyu zhou School of Control Science and Engineering Shandong UniversityJinan250061ShandongChina School of Software Shandong UniversityJinan250101ShandongChina Academy of Intelligent Innovation Shandong UniversityShunhua RoadJinan250101ShandongChina Inspur Cloud Information Technology Co. Ltd.Inspur GroupJinan250101ShandongChina

The solution strategy of the heuristic algorithm is pre-set and has good performance in the conventional cloud resource scheduling process.However,for complex and dynamic cloud service scheduling tasks,due to the difference in service attributes,the solution efficiency of a single strategy is low for such problems.In this paper,we presents a hyper-heuristic algorithm based on reinforcement learning(HHRL)to optimize the completion time of the task sequence.Firstly,In the reward table setting stage of HHRL,we introduce population diversity and integrate maximum time to comprehensively deter-mine the task scheduling and the selection of low-level heuristic strategies.Secondly,a task computational complexity estimation method integrated with linear regression is proposed to influence task scheduling priorities.Besides,we propose a high-quality candidate solution migration method to ensure the continuity and diversity of the solving process.Compared with HHSA,ACO,GA,F-PSO,etc,HHRL can quickly obtain task complexity,select appropriate heuristic strategies for task scheduling,search for the the best makspan and have stronger disturbance detection ability for population diversity.

关键词： Task scheduling cloud computing hyper-heuristic algorithm makespan optimization

An Iterative Learning Approach to Identify Fractional Order KiBaM Model

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IEEE/CAA Journal of Automatica Sinica 2017年第2期4卷 322-331页

作者： Yang Zhao Yan Li fengyu zhou Zhongkai zhou YangQuan Chen School of Control Science and Engineering Shandong University IEEE School of Engineering University of California

This paper discusses the parameter and differentiation order identification of continuous fractional order Ki Ba M models in ARX(autoregressive model with exogenous inputs)and OE(output error model) forms. The least squares method is applied to the identification of nonlinear and linear parameters,in which the Grunwald-Letnikov definition and short memory principle are applied to compute the fractional order derivatives.An adaptive P-type order learning law is proposed to estimate the differentiation order iteratively and accurately. Particularly,a unique estimation result and a fast convergence speed can be arrived by using the small gain strategy, which is unidirectional and has certain advantages than some state-of-art methods. The proposed strategy can be successfully applied to the nonlinear systems with quasi-linear characteristics. The numerical simulations are shown to validate the concepts.

关键词： Fractional calculus iterative learning identification KiBaM model system identification

Extending the Frequency Range of Surface Plasmon Polariton Mode with Meta-Material

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Nano-Micro Letters 2017年第1期9卷 122-129页

作者： fengyu zhou Fang Liu Long Xiao Kaiyu Cui Xue Feng Wei Zhang Yidong Huang Department of Electronic Engineering Tsinghua National Laboratory for Information Science and TechnologyTsinghua UniversityBeijing 100084People’s Republic of China

The frequency range that surface plasmon polariton(SPP) mode exists is mainly limited by the metal material.With high permittivity dielectrics above metal surface, the SPP mode at high frequency has extremely large loss or can be cutoff, which limits the potential applications of SPP in the field of optical interconnection, active SPP devices and so on.To extend the frequency range of SPP mode, the surface mode guided by metal/dielectric multilayers meta-material has been studied based on the theory of electromagnetic field. It is demonstrated that surface mode not only could be supported by the meta-material but also extends the frequency to where conventional metal SPP cannot exist. Meanwhile, the characteristics of this surface mode, such as dispersion relation, frequency range, propagation loss and skin depth in metamaterial and dielectrics, are also studied. It is indicated that, by varying the structure parameters, the meta-material guided SPP mode presents its advantages and flexibility over traditional metal one.

关键词： Plasmonics Surface plasmon polariton Hyperbolic meta-material Surface mode

3.0T磁共振内耳成像对儿童先天性听神经发育畸形的诊断价值分析

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中国医学文摘（耳鼻咽喉科学） 2024年第1期39卷 1-3页

作者：周凤羽荣成市中医院山东威海264300

目的儿童先天性听神经发育畸形患儿诊断工作中,采用3.0T磁共振内耳成像的诊断价值及效果分析。方法病例样本均收录于在我院接受诊疗的先天性听神经发育畸形患儿,共计收录样本20例,均收录于2021.9——2022.9期间,样本入组后均接受3.0T磁... 详细信息

目的儿童先天性听神经发育畸形患儿诊断工作中,采用3.0T磁共振内耳成像的诊断价值及效果分析。方法病例样本均收录于在我院接受诊疗的先天性听神经发育畸形患儿,共计收录样本20例,均收录于2021.9——2022.9期间,样本入组后均接受3.0T磁共振内耳成像进行诊断,并回顾分析20例患儿3.0T磁共振内耳成像诊断结果,探究3.0T磁共振内耳成像对儿童先天性听神经发育畸形的诊断价值。结果20例患儿经3.0T磁共振内耳成像诊断检出存在内听道内听神经信号异常的样本共计26侧,检出率为65.00%(26/40),其中,蜗神经细小共计检出4侧,占比为15.38%【左侧2侧(2例),双侧2侧(1例)】;面听神经信号损失共计检出2侧,占比为7.69%【均为左右耳2侧(1例)】;内耳蜗神经信号缺失共计检出20侧,占比为76.92%【仅左侧10侧(10例),仅右侧2侧(2例),双侧4侧(2例)】。结论儿童先天性听神经发育畸形患儿诊断工作中,采用3.0T磁共振内耳成像的诊断价值及效果显著,能清晰显示患者内听道内前庭神经和耳蜗神经,为后续临床对症治疗方案的制定提供精准的影像学信息支持。

关键词：儿童先天性听神经发育畸形 3.0T磁共振内耳成像诊断价值

风作用下含磁流变阻尼器的拉索攀爬机器人动力学建模与分析

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中国科学：技术科学 2024年第2期54卷 351-364页

作者：马凯威王宁周洋如徐丰羽王兴松南京邮电大学自动化学院人工智能学院南京210023 江苏省物联网智能机器人工程研究中心南京210023 东南大学机械工程学院南京211189

为增强拉索攀爬机器人在不同风载环境下的适应能力,提出了一种机器人-拉索-风耦合系统的动力学建模与分析方法.首先,利用磁流变液体的固液转换特性,设计了具有输出力连续可调功能的阻尼器,并将其应用于拉索攀爬机器人.其次,分析拉索载荷... 详细信息

为增强拉索攀爬机器人在不同风载环境下的适应能力,提出了一种机器人-拉索-风耦合系统的动力学建模与分析方法.首先,利用磁流变液体的固液转换特性,设计了具有输出力连续可调功能的阻尼器,并将其应用于拉索攀爬机器人.其次,分析拉索载荷,建立了机器人-拉索-风耦合动力学模型.然后,通过有限元分析,获得阻尼器中磁流变液产生的阻尼力变化范围为0~153.45 N,与理论模型一致.同时,利用动力学模型的数值仿真得到了阻尼器的建议工作电流分别为0.1 A (3级风)和0.3 A (6级风).最后,为了验证以上理论,分别对阻尼器和拉索攀爬机器人进行了性能测试实验.结果表明,与理论值相比,该阻尼器实际输出力的平均相对误差不超过3.22%.将其安装到机器人上,可将速度波动范围降低83.7%,能显著提高机器人的爬升稳定性.

关键词：磁流变阻尼器拉索攀爬机器人机器人-拉索-风耦合动力学建模与分析爬升稳定性

全球发展倡议与全球安全倡议视域下“发展—安全关联”研究

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云南警官学院学报 2024年第1期 81-86页

作者：周琼陈冯妤云南警官学院云南昆明650223

在和平赤字、发展赤字、安全赤字、治理赤字加重背景下,习近平主席先后在2021年9月和2022年4月提出全球发展倡议和全球安全倡议,给出缓解发展赤字和安全赤字的中国理念和中国方案。全球发展倡议和全球安全倡议坚持统筹安全与发展,旨在... 详细信息

在和平赤字、发展赤字、安全赤字、治理赤字加重背景下,习近平主席先后在2021年9月和2022年4月提出全球发展倡议和全球安全倡议,给出缓解发展赤字和安全赤字的中国理念和中国方案。全球发展倡议和全球安全倡议坚持统筹安全与发展,旨在建设全球发展共同体和全球安全共同体。两大倡议的协同增效既需要国外行为体的政治支持和密切合作,又需要中国以“一带一路”倡议为抓手推进国际发展合作新平台建设,创设全球安全与发展知识分享平台,推行元首引领的制度化峰会等举措。

关键词：全球发展倡议全球安全倡议 “发展—安全关联”

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左侧颞部副神经节瘤影像学表现一例

磁共振成像 2024年第4期15卷 159-161,176页

作者：卢婷王媛媛周凤瑜董文洁周俊林兰州大学第二医院放射科兰州730030 兰州大学第二临床医学院兰州730000 甘肃省医学影像重点实验室兰州730030

本研究为回顾性研究,遵守《赫尔辛基宣言》,并经兰州大学第二医院伦理委员会审核批准,免除受试者知情同意,批准文号:2023A-444。患者男,41岁,因“左侧颞部一质软包块伴头痛1年余,加重2天”,于2023年5月至兰州大学第二医院就诊。患者自诉... 详细信息

本研究为回顾性研究,遵守《赫尔辛基宣言》,并经兰州大学第二医院伦理委员会审核批准,免除受试者知情同意,批准文号:2023A-444。患者男,41岁,因“左侧颞部一质软包块伴头痛1年余,加重2天”,于2023年5月至兰州大学第二医院就诊。患者自诉1年前左侧颞部出现一质软包块伴头痛,在当地医院就诊,给予口服双氯芬酸钠缓释片(0.1 g/天)治疗后症状稍有缓解,2天前患者左侧颞部疼痛加重。查体:血压118 mmHg/82 mmHg(1 mmHg=0.133 kPa),自发病以来神志尚清,精神欠佳,近期体质量下降约10 kg。既往糖尿病病史1年余,规律口服盐酸二甲双胍缓释片(0.5 g/天)。实验室检查:葡萄糖10.86 mmol/L(3.90~6.10 mmol/L),血气分析、凝血功能未见明显异常。

关键词：颅脑颞部肿瘤副神经节瘤计算机体层成像磁共振成像