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Journal of Traffic and Transportation Engineering(English Edition) 2024年

作者： Zhongxi Tong Han Wu zhicheng shi Leonid Myagkov School of Mechanical Engineering， Beijing Institute of Technology Department of Piston Engines， Bauman Moscow State Technical University

With the continuous improvement of performance requirements， direct injection diesel engines have gradually developed towards more small， lightweight， and high power， named as high power-density. It needs more injected fuel can be mixed and burn at the same duration time to guarantee the thermal-power conversion effects. It is required that the combustion system has a fast mixing speed of fuel and gas， and a fast combustion speed. Organizing appropriate cylinder turbulence is an effective means of optimizing combustion to reach requirements. The current work is aim to investigates and summarizes the influence of different types of in cylinder turbulence coursed by intake， spray， and combustion chamber configuration on the performance of a highly intensified diesel engine from the three causes of turbulence. The comparative study found that the adoption of a separate combustion chamber， the increase of intake swirl and number of nozzles can have positive effect on the optimization of the combustion process of a highly intensified diesel engine， but for different combustion chamber types， the influence of intake swirl and spray parameters was different. The separated combustion chamber is more sensitive to spray parameters than the combustion chamber without wall guide design. Compared with the transverse separated combustion chamber， the longitudinal separated combustion chamber is more suitable for large intake swirl ratio. For a specific combustion chamber structure， both intake swirl and spray parameters have optimal values.

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仿生结构生色技术及其在纺织领域应用的研究进展

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纺织学报 2024年第8期45卷 241-249页

作者：史芷丞张玉于鸿马桂玲陈凤翔徐卫林武汉纺织大学纺织新材料及先进加工技术国家重点实验室湖北武汉430200 北京中纺海天新材料技术有限公司北京100026

针对传统印染行业高能耗、高污染的问题,急需革新染色技术,开发具有更加高效、节能和环保的染色新方法。结构色因其色彩饱和度高、色彩长期稳定且对环境友好而受到了越来越多的关注,并取得了极大进展,尤其是在纺织印染领域。首先分析了... 详细信息

针对传统印染行业高能耗、高污染的问题,急需革新染色技术,开发具有更加高效、节能和环保的染色新方法。结构色因其色彩饱和度高、色彩长期稳定且对环境友好而受到了越来越多的关注,并取得了极大进展,尤其是在纺织印染领域。首先分析了结构色的形成原理,系统总结了结构色材料的制备新技术,包括刮涂法/喷涂法、垂直沉积法、重力沉降法、浸渍提拉法、层层自组装法、电泳沉积法、静电纺丝法、磁控溅射法、原子层沉积法等,并比较了各种技术的优劣。在此基础上,进一步探讨了结构色在纺织领域中的多维应用,指出了结构色所面临的挑战,并从仿生自然发展新型结构色材料、提高结构色色彩丰富度及力学稳定性、突破结构色规模化制备技术、完善结构色产品生态等4个方面展望了结构色的未来发展方向,以期推动结构色跨越式发展,助力“碳达峰,碳中和”国家战略。

关键词：结构色光子晶体结构色纤维染色新技术结构生色方法

Numerical study on the ceiling gas temperature in a subway train with different fire locations

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Building Simulation 2022年第4期15卷 549-560页

作者： Wei Cong Long shi zhicheng shi Min Peng Hui Yang Xudong Cheng State Key Laboratory of Fire Science University of Science and Technology of ChinaHefeiAnhui 230026China Civil and Infrastructure Engineering School of EngineeringRMIT UniversityMelbourne 3004Australia

Ceiling gas temperature rise is an important evaluation indicator determining the level of risk in a subway tunnel ***,very little literature has been found that has addressed the emergency when a fired subway train with lateral multiple openings stops in the interval ***,a battery of full-scale numerical simulations were employed to address the impact of train fire location on the gas temperature beneath the train *** results showed that the ceiling gas temperature rise is affected by the pressure difference on both sides of fire source and the backflow from the end wall,which depends on the heat release rate and the fire *** ceiling gas temperature rise decays exponentially in the process of longitudinal spread,and it can be predicted by a dimensionless model with a sum of two exponential ***,based on a critical fire location(L'cr=0.667),two exponential equations were developed to quantitatively express the influences of the fire size and the fire location on the maximum ceiling gas *** research results can be utilized for providing an initial understanding of the smoke propagation in a subway train fire.

关键词： train fire subway tunnel fire location temperature attenuation maximum gas temperature numerical simulation

All-cellulose-based quasi-solid-state supercapacitor with nitrogen and boron dual-doped carbon electrodes exhibiting high energy density and excellent cyclic stability

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Green Energy & Environment 2023年第4期8卷 1091-1101页

作者： Kaixuan Li Ping Li Zining Sun Jing shi Minghua Huang Jingwei Chen Shuai Liu zhicheng shi Huanlei Wang School of Materials Science and Engineering Ocean University of ChinaQingdao266100China

The key to construct high-energy supercapacitors is to maximize the capacitance of electrode and the voltage of the device. Realizing this purpose by utilizing sustainable and low-cost resources is still a big challenge. Herein, N, B co-doped carbon nanosheets are obtained through the proposed dual-template assisted approach by using methyl cellulose as the precursor. Due to the synergistic effects form the high surface area with the hierarchical porous structure, N/B dual doping, and a high degree of graphitization, the resultant carbon electrode exhibits a high capacitance of 572 F g^(-1)at 0.5 A g^(-1)and retains 281 F g^(-1)at 50 A g^(-1)in an acidic electrolyte. Furthermore, the symmetric device assembled using bacterial cellulose-based gel polymer electrolyte can deliver high energy density of 43 W h kg^(-1)and excellent cyclability with 97.8% capacity retention after 20 000 cycles in “water in salt” electrolyte. This work successfully realizes the fabrication of high-performance allcellulose-based quasi-solid-state supercapacitors, which brings a cost-effective insight into jointly designing electrodes and electrolytes for supporting highly efficient energy storage.

关键词： Dual doping Carbon materials Quasi-solid-state supercapacitor Cellulose Hierarchical structure

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入炉煤总氯量对粗苯含氯超标的影响分析

煤质技术 2024年第3期39卷 93-96页

作者：史晓亮陈昌华古卫军史治澄山西金岩能源科技有限公司山西吕梁032300

粗苯为1种重要的化工原料,其主要用于深加工制苯、甲苯、二甲苯等产品。粗苯含氯高会严重腐蚀管道,对后续苯加氢等深加工利用带来危害。经对化工产品生产工艺以及入炉煤综合分析研判,基于粗苯含氯情况重点从入炉煤、介质、冷却器清洗、... 详细信息

粗苯为1种重要的化工原料,其主要用于深加工制苯、甲苯、二甲苯等产品。粗苯含氯高会严重腐蚀管道,对后续苯加氢等深加工利用带来危害。经对化工产品生产工艺以及入炉煤综合分析研判,基于粗苯含氯情况重点从入炉煤、介质、冷却器清洗、换热设备串漏等方面排查粗苯含氯增高的影响因素,并结合煤中氯的释放、洗煤对精煤含氯的影响探讨入炉煤含氯量与粗苯含氯量的关系。结果表明:高氯煤是造成粗苯含氯升高的直接因素,煤在碳化室热解过程中,煤中氯离子会以HCl的形式析出并进入荒煤气与化产回收系统中。当入炉煤总氯量偏高时,严重影响粗苯等化工产品的质量。在化工产品生产工艺正常的情况下,入炉煤中总氯含量应低于0.1%,以保证粗苯含氯量控制在10μg/g以内。

关键词：粗苯含氯量入炉煤总氯量线性关系生产工艺影响因素换热设备

A Unified Motion Generation Approach for Quadruped L-S Walk and Trot Gaits Based on Linear Model Predictive Control

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Journal of Bionic Engineering 2024年第4期21卷 1707-1719页

作者： Yapeng shi zhicheng He Xiaokun Leng Songhao Piao Lining Sun Harbin Institute of Technology No.92 West Dazhi StreetHarbin150001HeilongjiangChina Yanshan University No.438 West Hebei AvenueQinhuangdao066004HebeiChina

The goal of this paper is to develop a unified online motion generation scheme for quadruped lateral-sequence walk and trot gaits based on a linear model predictive control ***,the dynamics of the linear pendulum model is formulated over a predictive horizon by dimensional *** gait pattern conversion,the lateral-sequence walk and trot gaits of the quadruped can be regarded as unified biped gaits,allowing the dynamics of the linear inverted pendulum model to serve quadruped motion *** addition,a simple linearization of the center of pressure constraints for these quadruped gaits is developed for linear model predictive control ***,the motion generation problem can be solved online by quadratic programming with foothold *** is demonstrated that the proposed unified scheme can generate stable locomotion online for quadruped lateral-sequence walk and trot gaits,both in simulation and on *** results show significant performance improvements compared to previous ***,the results also suggest the linearly simplified scheme has the ability to robustness against unexpected disturbances.

关键词： Motion generation Gait pattern conversion Model predictive control Quadruped locomotion

Alcohol solvent effect on the self-assembly behaviors of lignin oligomers

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Green Energy & Environment 2024年第4期9卷 597-603页

作者： Ya Ma zhicheng Jiang Yafei Luo Xingjie Guo Xudong Liu Yiping Luo Bi shi College of Biomass Science and Engineering Sichuan UniversityChengdu610065China National Engineering Research Center of Clean Technology in Leather Industry Sichuan UniversityChengdu610065China College of Pharmacy(International Academy of Targeted Therapeutics and Innovation) Chongqing University of Arts and SciencesChongqing402160China State Key Laboratory of Utilization of Woody Oil Resource Hunan Academy of ForestryChangsha410004China CAS Key Laboratory of Environmental and Applied Microbiology Environmental Microbiology Key Laboratory of Sichuan ProvinceChengdu Institute of BiologyChinese Academy of SciencesChengdu610041China

The interactions between lignin oligomers and solvents determine the behaviors of lignin oligomers self-assembling into uniform lignin nanoparticles(LNPs).Herein,several alcohol solvents,which readily interact with the lignin oligomers,were adopted to study their effects during solvent shifting process for LNPs’*** lignin oligomers with widely distributed molecular weight and abundant guaiacyl units were extracted from wood waste(mainly consists of pine wood),exerting outstanding self-assembly *** and spherical LNPs were generated in H_(2)O-n-propanol cosolvent,whereas irregular LNPs were obtained in H_(2)O-methanol *** unsatisfactory self-assembly performance of the lignin oligomers in H_(2)O-methanol cosolvent could be attributed to two *** one hand,for the initial dissolution state,the distinguishing Hansen solubility parameter and polarity between methanol solvent and lignin oligomers resulted in the poor dispersion of the lignin *** the other hand,strong hydrogen bonds between methanol solvent and lignin oligomers during solvent shifting process,hindered the interactions among the lignin oligomers for self-assembly.

关键词： Lignin oligomers Alcohol solvent Self-assembly LNPs Solvent effects

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一种优化异形件内孔自动化加工的方法

自动化应用 2024年第3期65卷 137-139页

作者：刘泽林王伟宋亚辉石智成李海豹中国兵器工业集团第五二研究所内蒙古包头014034

为确保异形件内孔的加工精度满足客户的要求,提升加工工艺工序的可操作性,提出了一种优化异形件内孔自动化加工的方法。该方法通过优化刀具和刀柄长度,同时在数控机床编制宏程序,实现了设备的自动化加工。经生产试制,使用该方法不仅使... 详细信息

为确保异形件内孔的加工精度满足客户的要求,提升加工工艺工序的可操作性,提出了一种优化异形件内孔自动化加工的方法。该方法通过优化刀具和刀柄长度,同时在数控机床编制宏程序,实现了设备的自动化加工。经生产试制,使用该方法不仅使产品的质量达到了要求,还提升了生产效率。

关键词：异形件宏程序自动化加工

新工科背景下创新基地建设——以兰州工业学院材子智造创新基地为例

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兰州工业学院学报 2024年第2期31卷 145-148页

作者：贾金龙关玮李祥林沈建成易湘斌史志成兰州工业学院材料工程学院甘肃兰州730050 兰州工业学院创新创业学院甘肃兰州730050 兰州工业学院机电工程学院甘肃兰州730050 国药集团兰州生物制药有限公司生产管理部甘肃兰州730000

针对工科类专业人才创新创业教育严重滞后于新工科要求的现状,提出构建理论学习、项目进化、研究创新三层次创新创业人才培养体系,践行OBE理念,借助大学生创新项目驱动,利用学科技能竞赛、产教融合、科创融合、组建师生学习共同体等一... 详细信息

针对工科类专业人才创新创业教育严重滞后于新工科要求的现状,提出构建理论学习、项目进化、研究创新三层次创新创业人才培养体系,践行OBE理念,借助大学生创新项目驱动,利用学科技能竞赛、产教融合、科创融合、组建师生学习共同体等一系列行之有效的手段,提高创新创业教育水平。实践证明,通过材子智造创新基地多年的建设,学生在创新创业项目、学科竞赛、考研、就业等方面取得了一定的成绩,达到了培养符合新工科要求的应用技术型人才的目标。

关键词：创新创业创新基地新工科

Active Micro-Nano-Collaborative Bioelectronic Device for Advanced Electrophysiological Recording

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Nano-Micro Letters 2024年第7期16卷 244-264页

作者： Yuting Xiang Keda shi Ying Li Jiajin Xue zhicheng Tong Huiming Li Zhongjun Li Chong Teng Jiaru Fang Ning Hu Department of Chemistry Zhejiang-Israel Joint Laboratory of Self-Assembling Functional MaterialsZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 310058People’s Republic of China School of Basic Medical Sciences Zhejiang Chinese Medical UniversityHangzhou 310053People’s Republic of China General Surgery Department Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Children’s HealthHangzhou 310052People’s Republic of China Department of Lung Transplantation and General Thoracic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003People’s Republic of China Department of Orthopedics The Fourth Affiliated HospitalZhejiang University School of MedicineYiwu 322005People’s Republic of China School of Electronics and Information Technology Sun Yat-Sen UniversityGuangzhou 510006People’s Republic of China Department of Obstetrics and Gynecology The Tenth Affiliated HospitalSouthern Medical UniversityDongguan 523059People’s Republic of China Dongguan Key Laboratory of Major Diseases in Obstetrics and Gynecology Dongguan 523059People’s Republic of China

The development of precise and sensitive electrophysiological recording platforms holds the utmost importance for research in the fields of cardiology and *** recent years,active micro/nano-bioelectronic devices have undergone significant advancements,thereby facilitating the study of *** distinctive configuration and exceptional functionality of these active micro-nano-collaborative bioelectronic devices offer the potential for the recording of high-fidelity action potential signals on a large *** this paper,we review three-dimensional active nano-transistors and planar active micro-transistors in terms of their applications in electroexcitable cells,focusing on the evaluation of the effects of active micro/nano-bioelectronic devices on electrophysiological *** forward to the possibilities,challenges,and wide prospects of active micro-nano-devices,we expect to advance their progress to satisfy the demands of theoretical investigations and medical implementations within the domains of cardiology and neuroscience research.

关键词： Active micro/nano collaborative bioelectronic device Three-dimensional active nano-transistor Planar active microtransistor Electrophysiology