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Boosting solar hydrogen production via electrostatic interaction mediated E.coli-TiO_(2−x)biohybrid system

Nano Research 2024年第6期17卷 5390-5398页

作者： Xingxing Lv weicheng huang Ya Gao Rui Chen Xiaowei Chen Danqing Liu Ling Weng Liangcan He Shaoqin Liu School of Material Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150040China School of Medicine and Health and Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of EducationHarbin Institute of TechnologyHarbin 150001China Department of Physics School of ScienceJimei UniversityXiamen 361021China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046China

Hydrogen is garnering growing attention as a green energy source with zero carbon emissions.However,most hydrogen production technologies still rely on the consumption of fossil fuels and are therefore unsustainable.This has driven the search for more environmentally friendly methods of hydrogen production.In this work,we present an innovative approach to enhance hydrogen generation via electrostatic interaction in the Escherichia coli and defective titanium dioxide(TiO_(2−x))biohybrids.Our method involves narrowing the forbidden bandwidth of TiO2 while introducing defect bands into its conduction band to facilitate visible light absorption and efficient charge separation.This biohybrid system,consisting of E.coli and TiO_(2−x),demonstrates a remarkable capability to produce 1.25 mmol of hydrogen within a 3-h timeframe under visible light irradiation.This accomplishment signifies a 3.31-fold rise in hydrogen production in comparison to E.coli,signifying a substantial enhancement in hydrogen production efficiency.Furthermore,we delve into the alterations in biological metabolites associated with hydrogen production and the changes in electron transfer in different biohybrid systems.It provides valuable insights into the understanding of the intrinsic mechanisms that drive the process.This work introduces a novel and promising avenue for achieving this exciting goal.

关键词： Escherichia coli TiO_(2−x)nanoparticles biohybrid system hydrogen production

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Static analysis of elastic cable structures under mechanical load using discrete catenary theory

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Fundamental Research 2023年第6期3卷 967-973页

作者： weicheng huang Dongze He Dezhong Tong Yuzhen Chen Xiaonan huang Longhui Qin Qingguo Fei School of Mechanical Engineering Southeast UniversityNanjing 211189China Jiangsu Engineering Research Center of Aerospace Machinery Southeast UniversityNanjing 211189China Department of Mechanical and Aerospace Engineering University of CaliforniaLos AngelesCA 90095USA Department of Mechanical Engineering and Materials Science Yale UniversityNew HavenCT 06511USA

In this paper,the nonlinear mechanical response of elastic cable structures under mechanical load is studied based on the discrete catenary theory.A cable net is discretized into multiple nodes and edges in our numerical approach,which is followed by an analytical formulation of the elastic energy and the associated Hessian matrix to realize the dynamic simulation.A fully implicit framework is proposed based on the discrete differential geometry(DDG)theory.The equilibrium configuration of a target object is derived by adding damping force into the system,known as the dynamic relaxation method.The mechanical response of a single suspended cable is investigated and compared with the analytical solution for cross-validation.A more intricate scenario is further discussed in detail,where a structure consisting of multiple slender cables is connected through joints.Utilizing the robustness and efficiency of our discrete numerical framework,a systematic parameter sweep is performed to quantify the force displacement relationships of nets with the different number of cables and different directions of fibers.Finally,an empirical scaling law is provided to account for the rigidity of elastic cable net in terms of its geometric properties,material characteristics,component numbers,and cable orientations.Our results would provide new insight in revealing the connections between flexible structures and tensegrity structures,and could motivate innovative designs in both mechanical and civil engineered equipment.

关键词： Cable structures Rigidity Solid mechanics Computational mechanics Numerical simulation Nonlinearity

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Numerical simulation and behavior prediction of a space net system throughout the capture process: Spread, contact, and close

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International Journal of Mechanical System Dynamics 2023年第3期3卷 265-273页

作者： weicheng huang Huaiwu Zou Yongjun Pan Kai Zhang Junjie Zheng Jinpeng Li Shuai Mao School of Mechanical Engineering Southeast UniversityNanjingChina Shanghai Institute of Aerospace Systems Engineering ShanghaiChina College of Mechanical and Vehicle Engineering Chongqing UniversityChongQingChina

In this paper,we develop an exhaustive numerical simulator for the dynamic visualization and behavior prediction of the tether-net system during the whole space debris capture phases,including spread,contact,and close.First of all,to perform its geometrically nonlinear deformation,discrete different geometry theory is applied to model the mechanical response of a flexible net.Based on the discretization of the whole structure into multiple vertexes and lines,the internal force and associated Hession are derived in a closed form to solve a series of nonlinear dynamic equations of motion.The spread and deployment of a packaged net can be realized using this well-established net solver.Next,a multidimensional incremental potential formulation is selected to achieve the intersection-free boundary nonlinear contact and collision between the deformable net and rigid debris.Finally,for the closing mechanism analysis,a log-like barrier functional is derived to achieve the nondeviation condition between the ring–rod linkage system.The C2 continuous log barrier functionals constructed for both the contact model and the linkage system are smooth and differentiable,and,therefore,the nonlinear net capture dynamic system can be efficiently solved through a fully implicit time integrator.Overall,as a demonstration,the whole capture process of a defunct satellite using a hexagon net is simulated through our well-established numerical framework.We believe that our comprehensive numerical methods could provide new insight into the optimal design of active debris removal systems and promote further development of the online control of tether tugging systems.

关键词： tether-net system space debris capture nonlinear dynamics multiflexible body dynamics

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软体机器人动力学建模与计算研究进展

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力学季刊 2024年第1期45卷 1-18页

作者：黄炜成周帅秦龙辉东南大学机械工程学院江苏南京211189

由刚性结构制成的传统机器人存在灵活性差、环境适应能力低、人机交互不友好等缺点,而近些年受自然界生物启发研制的各类软体机器人则可克服这些缺点,但由于具有无限自由度,软体机器人的优化设计与在线控制尚面临诸多瓶颈.通过力学建模... 详细信息

由刚性结构制成的传统机器人存在灵活性差、环境适应能力低、人机交互不友好等缺点,而近些年受自然界生物启发研制的各类软体机器人则可克服这些缺点,但由于具有无限自由度,软体机器人的优化设计与在线控制尚面临诸多瓶颈.通过力学建模与数值仿真,则能够更好地理解其形变过程,进而指导软体机器人的设计与制造.本文聚焦最新的软体机器人动力学仿真研究,关注结构建模方法和交互仿真方法在理论计算中的应用.在结构建模方法中,从三维实体单元模型出发,介绍有限元方法的基本原理及其在静态模型、可微框架和可微投影动力学等策略中的应用;在板壳模型方面,探讨经典的基尔霍夫-勒夫板壳模型和离散壳模型.接着在结构建模中聚焦简化模型,包括基于一维降阶模型的细长结构仿真,其中涵盖了分段常曲率模型、Cosserat杆模型和绝对节点坐标方法等基本模型理论.通过典型工作的案例,探讨了一维简化模型的优势与缺点,并介绍了质量弹簧阻尼经典模型的操作方法以及最新的相关工作.在交互仿真技术中,围绕动力学仿真,涵盖外部环境交互和外场驱动交互两个方面,探讨了软体机器人动力学仿真中的挑战与应对策略.此项工作旨在为机器人开发者提供全新的动力学仿真思路,实现更逼真的仿真效果,进而为软体机器人的优化设计及在线控制提供理论支撑.

关键词：软体机器人动力学仿真有限元简化模型交互模型

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行政诉讼证据规则的适用性——基于三起行政诉讼案件的分析

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西部学刊 2024年第6期 63-66页

作者：黄炜乘澳门科技大学中国澳门999078

行政诉讼中的证据规则是行政诉讼中对于可以证明为行政诉讼的事实状态的全部事实内容的基本准则,在具体司法实践中有严格要求,但对于具体条文的理解较为宽泛。结合对交通行政处罚、产品商标权、土地信息资料登记三个具体行政诉讼涉诉案... 详细信息

行政诉讼中的证据规则是行政诉讼中对于可以证明为行政诉讼的事实状态的全部事实内容的基本准则,在具体司法实践中有严格要求,但对于具体条文的理解较为宽泛。结合对交通行政处罚、产品商标权、土地信息资料登记三个具体行政诉讼涉诉案例分析,对行政诉讼中作证规则、质证规则、认证规则三个重要规则进行阐述,进一步说明证据提供规则是质证和认证的基础,调取证据是解决当事人举证困难的救济方式,作证和质证是法庭对证据认定的重要环节,认证规则则是对案件事实和证明效力的认定。

关键词：行政诉讼证据规则案例

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Low-resistance, high-force, and large-ROM fabric-based soft elbow exosuits with adaptive mechanism and composite bellows

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Science China(Technological Sciences) 2023年第1期66卷 24-32页

作者： huang weicheng FENG Miao YANG DeZhi GU GuoYing Robotics Institute School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Meta Robotics Institute Shanghai Jiao TongUniversityShanghai 200240China

Due to the lightweight and compliance, fabric-based pneumatic exosuits are promising in the assistance and rehabilitation of elbow impairments. However, existing elbow exosuits generally suffer from remarkable mechanical resistance on the flexion of the elbow, thus limiting the output force, range of motion(ROM), and comfortability. To address these challenges, we develop a fabric-based soft elbow exosuit with an adaptive mechanism and composite bellows in this work. With the elbow kinesiology considered, the adaptive mechanism is fabricated by sewing the interface of the exosuit into spring-like triangle pleats, following the profile of the elbow to elongate or contract when the elbow flexes or extends. The composite bellows are implemented by further sealing a single blade of bellows into two branches to enhance the output force. Based on these structural features, we characterize the mechanical performance of different soft elbow exosuits: exosuit with normal bellows-NB, exosuit with adaptive mechanism and normal bellows-AMNB, exosuit with adaptive mechanism and composite bellows-AMCB. Experimental results demonstrate that by comparing with NB, the mechanical resistance of AMNB and AMCB decreases by 80.6% and 78.6%, respectively;on the other hand, the output torque of AMNB and AMCB increases to 120.3% and 207.0%, respectively, at50 k Pa when the joint angle is 120°. By wearing these exosuits on a wooden arm model(1.25 kg), we further verify that AMCB can cover a full ROM of 0°–130° at the elbow with 500 g weight. Finally, the application on a health volunteer with AMCB shows that when the volunteer flexes the elbow to lift a weight of 500 g, the s EMG activity of the biceps and triceps is markedly reduced.

关键词： wearable robots rehabilitation robots soft robot applications soft actuators design

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基于单片机的电子线路诊断系统设计

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集成电路应用 2024年第4期41卷 106-107页

作者：黄伟成金亮田苏明赵俊程沈阳工学院辽宁113122

阐述一种基于STM32单片机的线路故障检测系统的设计,通过集成的AD转换器进行电压和电流信号的采集,使用一系列的算法对数据进行处理与分析,并根据分析结果判断是否存在故障。

关键词：单片机 STM32 自动检测系统

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腹部手术后是否需要常规放置腹腔引流管的范围综述

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循证护理 2024年第13期10卷 2334-2338页

作者：黄清霞王静韦红宇黄炜程蒋丹丹唐文帅桂林医学院护理学院广西541004

目的:对腹部手术后是否需要常规放置腹腔引流管进行范围综述,旨在为该领域的相关研究提供参考。方法:计算机检索中国知网、万方数据库、中国生物医学文献数据库、维普数据库、EMbase、PubMed、the Cochrane Library等国内外数据库,检索... 详细信息

目的:对腹部手术后是否需要常规放置腹腔引流管进行范围综述,旨在为该领域的相关研究提供参考。方法:计算机检索中国知网、万方数据库、中国生物医学文献数据库、维普数据库、EMbase、PubMed、the Cochrane Library等国内外数据库,检索时限为建库至2023年3月2日。对纳入文献进行筛选、汇总和分析。结果:共纳入12篇相关的文献,发表时间为1987—2023年,研究类型包括回顾性研究、观察性研究、病例对照研究、随机对照试验及前瞻性随机试验研究。纳入的大部分文献对于胃、肠、肝、胆、胰以及阑尾等腹部手术后不建议常规放置引流管;少数文献指出,即使放置引流管也提倡尽早拔除,以缩短病人的住院时间,降低腹部感染及其他并发症发生率。结论:现有文献对于腹部手术后常规放置或不放置腹腔引流管存在较大争议,加速康复外科理念提倡尽早拔除腹腔引流管,尚需要更多地研究明确腹部手术后是否需要常规放置腹腔引流管的临床决策。

关键词：腹部手术腹腔引流管导管相关性感染范围综述

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贵州生态环境行政执法队伍培训问题及对策

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黑龙江环境通报 2024年第7期37卷 148-150页

作者：马先杰段明宇王唐黄炜晟吴维王时亮贵州绿兴清源环保有限责任公司贵阳550001 贵州省环境工程评估中心贵阳550001 贵州绿洲清源环境监测有限公司贵阳550001

随着我国生态环境保护行政执法队伍建设不断深入,为加强生态环境保护行政执法队伍建设,完善培训体系,强化培训效果,致力于打造生态环境执法队伍铁军,国家出台了一系列政策措施,对生态环境保护行政执法队伍培训提出了更高的要求。本文对... 详细信息

随着我国生态环境保护行政执法队伍建设不断深入,为加强生态环境保护行政执法队伍建设,完善培训体系,强化培训效果,致力于打造生态环境执法队伍铁军,国家出台了一系列政策措施,对生态环境保护行政执法队伍培训提出了更高的要求。本文对贵州生态环境保护综合行政执法队伍培训的现状与存在问题进行分析,提出对策建议。

关键词：生态环境行政执法培训贵州

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Next‑Generation Sequencing‑Based Copy Number Variation Analysis in Chinese Patients with Primary Ciliary Dyskinesia Revealed Novel DNAH5 Copy Number Variations

Phenomics

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Phenomics 2024年第1期4卷 24-33页

作者： weicheng Chen Zhuoyao Guo Mengru Li Wei Sheng Guoying huang Cardiovascular Center Children’s Hospital of Fudan University399 Wanyuan RoadShanghai 201102China Respirology Department Children’s Hospital of Fudan UniversityShanghai 201102China

Primary ciliary dyskinesia(PCD)is a rare disorder characterized by extensive genetic heterogeneity.However,in the genetic pathogenesis of PCD,copy number variation(CNV)has not received sufcient attention and has rarely been reported,especially in China.Next-generation sequencing(NGS)followed by targeted CNV analysis was used in patients highly suspected to have PCD with negative results in routine whole-exome sequencing(WES)analysis.Quantitative real-time polymerase chain reaction(qPCR)and Sanger sequencing were used to confrm these CNVs.To further characterize the ciliary phenotypes,high-speed video microscopy analysis(HSVA),transmission electron microscopy(TEM),and immunofuorescence(IF)analysis were used.Patient 1(F1:II-1),a 0.6-year-old girl,came from a nonconsanguineous family-I.She presented with situs inversus totalis,neonatal respiratory distress,and sinusitis.The nasal nitric oxide level was markedly reduced.The respiratory cilia beat with reduced amplitude.TEM revealed shortened outer dynein arms(ODA)of cilia.chr5:13717907-13722661del spanning exons 71–72 was identifed by NGS-based CNV analysis.Patient 2(F2:IV-4),a 37-year-old man,and his eldest brother Patient 3(F2:IV-2)came from a consanguineous family-II.Both had sinusitis,bronchiectasis and situs inversus totalis.The respiratory cilia of Patient 2 and Patient 3 were found to be uniformly immotile,with ODA defects.Two novel homozygous deletions chr5:13720087_13733030delinsGTTTTC and chr5:13649539_13707643del,spanning exons 69–71 and exons 77–79 were identifed by NGS-based CNV analysis.Abnormalities in DNA copy number were confrmed by qPCR amplifcation.IF showed that the respiratory cilia of Patient 1 and Patient 2 were defcient in dynein axonemal heavy chain 5(DNAH5)protein expression.This report identifed three novel DNAH5 disease-associated variants by WES-based CNV analysis.Our study expands the genetic spectrum of PCD with DNAH5 in the Chinese population.

关键词： Primary ciliary dyskinesia DNAH5 gene Copy number variation Phenotypic heterogeneity

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