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无痛胃肠镜下氩气刀切除术治疗胃肠息肉的效果

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中国实用医刊 2024年第15期51卷 38-41页

作者：牛倩倩李艳乐孙倩郑州大学第一附属医院消化内镜中心郑州450000 郑州大学第一附属医院消化内科郑州450000

目的探讨无痛胃肠镜下氩气刀切除术治疗胃肠息肉的效果。方法队列研究。抽取2022年1月至2023年12月郑州大学第一附属医院收治的胃肠息肉患者62例,按随机数字表法分为无痛组和常规组,每组31例。无痛组采用无痛胃肠镜下氩气刀切除术,常规... 详细信息

目的探讨无痛胃肠镜下氩气刀切除术治疗胃肠息肉的效果。方法队列研究。抽取2022年1月至2023年12月郑州大学第一附属医院收治的胃肠息肉患者62例,按随机数字表法分为无痛组和常规组,每组31例。无痛组采用无痛胃肠镜下氩气刀切除术,常规组采用常规内镜下氩气刀切除术。比较两组围术期指标、术后视觉模拟评分法(VAS)评分、疼痛应激指标[C反应蛋白(CRP)、皮质醇(Cor)、前列腺素E2(PGE2)]水平及并发症发生率。结果无痛组手术操作时长、术后肠鸣音消失时间及术中出血量均少于对照组(P均<0.05)。术后3、6、12 h,无痛组VAS评分均低于常规组(P均<0.05);术后6 h,无痛组CRP、Cor、PGE2水平低于常规组(P<0.05)。无痛组并发症发生率(3.23%,1/31)低于常规组(25.81%,8/31),P<0.05。结论无痛胃肠镜下氩气刀切除术用于胃肠息肉患者中可减少出血量,缩短手术操作时长,减轻机体疼痛和应激反应,促进患者术后恢复,且并发症较少,安全性良好。

关键词：息肉无痛胃肠镜下氩气刀切除术疼痛程度

经腹壁人工网片无张力双侧顶端悬吊盆底重建术的疗效分析

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实用医学杂志 2024年第12期40卷 1683-1689,1695页

作者：李娜王朕华牛倩倩陈贵芹罗穗豫董黎河南省人民医院妇科郑州大学人民医院河南大学人民医院郑州450003

目的观察经腹壁人工网片无张力双侧顶端悬吊盆底重建术的临床疗效。方法选取2021年3月1日至2023年10月31日在河南省人民医院因盆腔脏器脱垂行经腹壁人工网片无张力双侧顶端悬吊盆底重建术的患者作为观察组,共85例,同期行腹腔镜下骶骨固... 详细信息

目的观察经腹壁人工网片无张力双侧顶端悬吊盆底重建术的临床疗效。方法选取2021年3月1日至2023年10月31日在河南省人民医院因盆腔脏器脱垂行经腹壁人工网片无张力双侧顶端悬吊盆底重建术的患者作为观察组,共85例,同期行腹腔镜下骶骨固定术后的患者40例作为对照组,并分为保留子宫组、切除子宫组两个亚组。随访至2024年4月30日,分析其手术情况和术后并发症,并采用盆腔器官脱垂定量分期法(POP-Q)、盆底功能障碍性疾病症状问卷及其分量表(PFDI-20)、排尿困扰量表(UDI-6)、结直肠肛门困扰量表(CRADI-8)和盆腔器官脱垂困扰量表(POPDI-6)、盆底疾病生活质量影响问卷短表(PFIQ-7),盆腔器官脱垂/尿失禁性生活问卷(PISQ-12)对患者术前、术后治疗效果和生活质量进行组内及组间比较。结果观察组患者中位随访时间13.13个月,客观治愈率96.47%,再次手术率1.18%,围手术期并发症发生率为6.45%(切除子宫)、4.35%(保留子宫),网片暴露率1.61%(切除子宫)。对照组患者中位随访时间13.76个月,客观治愈率92.5%,再次手术率2.5%,围手术期并发症发生率为14.71%(切除子宫)、33.33%(保留子宫),网片暴露率8.82%(切除子宫)。观察组与对照组相比,客观治愈率、再次手术率无差异,观察组的手术时间短、出血少、术后排气快、住院时间短、围手术期并发症发生率低、网片暴露率低,尤其是保留子宫的患者,优势更明显。观察组和对照组患者组内比较时,术后1年与术前POP-Q的各指示点均明显改善(P0.05)。结论经腹壁人工网片无张力双侧顶端悬吊盆底重建术是治疗前、中盆腔脱垂的一种有效手术方案,可明显改善患者脱垂症状,提高患者生活质量,与骶骨固定术有相似的临床效果,尤其适用于保留子宫的患者。

关键词：前、中盆腔器官脱垂经腹壁人工网片无张力双侧顶端悬吊盆底重建术腹腔镜下骶骨固定术临床疗效

Network security protection technology for a cloud energy storage network controller

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Global Energy Interconnection 2020年第1期3卷 86-98页

作者： Tao Yan Jialiang Liu qianqian niu Jizhong Chen Shaohua Xu Meng niu China Electric Power Research Institute Haidian DistrictBeijing 100192P.R.China Beijing Jiaotong University Haidian DistrictBeijing 100044P.R.China

As part of the ongoing information revolution,smart power grid technology has become a key focus area for research into power *** electrical appliances are now an important component of power systems,providing a smart power grid with increased control,stability,and *** on the secure communication requirements of cloud energy storage systems,this paper presents the design and development of a node controller for a cloud energy storage *** function division and system deployment processes were carried out to ensure the security of the communication network used for the cloud energy storage *** protection measures were proposed according to the demands of the communication network,allowing the system to run safely and ***,the effectiveness of the system was verified through a client-side distributed energy storage demonstration project in Suzhou,*** system was observed to operate safely and stably,demonstrating good peak-clipping and valley filling effects,and improving the system load characteristics.

关键词： Cloud energy storage system Node controller Network security Smart grid Distributed energy storage

Distributed energy storage node controller and control strategy based on energy storage cloud platform architecture

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Global Energy Interconnection 2020年第2期3卷 166-174页

作者： Tao Yan Jialiang Liu qianqian niu Jizhong Chen Shaohua Xu Meng niu Jerry YSLin China Electric Power Research Institute Haidian DistrictBeijing 100192P.R.China Beijing Jiaotong University Haidian DistrictBeijing 100044P.R.China Arizona State University 336E Orange ST TempeAZ 85281ArizonaU.S.A

Based on the energy storage cloud platform architecture,this study considers the extensive configuration of energy storage devices and the future large-scale application of electric vehicles at the customer side to build a new mode of smart power consumption with a flexible interaction,smooth the peak/valley difference of the load side power,and improve energy efficiency.A plug and play device for customer-side energy storage and an internet-based energy storage cloud platform are developed herein to build a new intelligent power consumption mode with a flexible interaction suitable for ordinary *** on the load perception of the power grid,this study aims to investigate the operating state and service life of distributed energy storage *** selecting an integrated optimal control scheme,this study designs a kind of energy optimization and deployment strategy for stratified partition to reduce the operating cost of the energy storage device on the client *** effectiveness of the system and the control strategy is verified through the Suzhou client-side distributed energy storage demonstration project.

关键词： Distributed energy storage Optimum control Plug and play Energy storage cloud platform

Intrinsically ionic conductive nanofibrils for ultra-thin bio-memristor with low operating voltage

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Science China Materials 2022年第11期65卷 3096-3104页

作者： Yi Zhang Suna Fan qianqian niu Fang Han Yaopeng Zhang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China College of Information Science and Technology Donghua UniversityShanghai 201620China

Memristors integrated with low operating voltage,good stability,and environmental benignity play an important role in data storage and logical circuit technology,but their fabrication still faces *** study reports an ultra-thin bio-memristor based on pristine environmentfriendly silk nanofibrils(SNFs).The intrinsic ionic conductivity,combined with high dielectric performance and nanoscale thickness,lowers the operation voltage down to0.1-0.2 V,and enables stable switching and retention time over 180 times and 10^(5)s,***,the SNFbased memristor device in a crossbar array achieves stable memristive performance,and thus realizes the functions of memorizing image and logic *** carrying out variable-temperature electrical experiments and Kelvin probe force microscopy,the space charge-limited conduction mechanism is *** with low operating voltage,good stability,and ultra-thin thickness makes the SNF-based memristors excellent candidates in bioelectronics.

关键词： silk nanofibrils bio-memristor intrinsic ionic conductivity low operating voltage logic operation

Flexible piezoelectret film sensor for noncontact mechanical signal capture by multiple transmission media

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Nano Research 2024年第8期17卷 7643-7657页

作者： Xingchen Ma qianqian Hu Lian Zhou Xinhao Xiang Yi Qin Ke Zhang Pengfei He Ying Dai Wenxin niu Xiaoqing Zhang Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and EngineeringTongji UniversityShanghai 200092China Shanghai Yangzhi Rehabilitation Hospital(Shanghai Sunshine Rehabilitation Center) School of MedicineTongji UniversityShanghai 201619China Department of Rehabilitation Sciences Tongji University School of MedicineShanghai 200092China School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai 200092China

Mechanical signal capture without physical contact has emerged as a highly promising research field and attracted tremendous attention due to its prosperous applications in household medical care,lifestyle monitoring and remote operation,offering users high level of safety,convenience and ***,noncontact sensing is ideal to maximize the immersive user experience in the human–machine interaction(HMI),eliminating interference to human activities and mechanical fatigue to the sensor,***,we report a self-powered flexible sensor integrated with irradiation cross-linked polypropylene(IXPP)piezoelectret film for noncontact sensing,featuring multi-functions to detect mechanical signals transmitted through solid,liquid and gaseous media and would facilitate their versatile practical *** folded-structure configuration of the sensor facilitates the improvement of the noncontact sensing *** solid media,such as the rectangular wooden stick used in this study,the sensor can detect mechanical stimulus exerted at a distance of 100 cm.A system detection sensitivity up to 57 pC/kPa with a low detection limit of 0.6 kPa is achieved at a noncontact distance of 10 *** when partly or completely immersed in water,the sensor effectively traces movement signals of human bodies underwater,demonstrating great advantages for non-inductive aquatic fitness training ***,due to the low acoustic impedance of piezoelectret film,speech recognition through gaseous medium is also *** further introduce application demonstrations of the developed film sensors to monitor exercise postures and physiological signals without direct contact between human body and the sensor,displaying great potential to be incorporated into future smart *** study commendably expands the application scope of piezoelectret materials,which will have profound implications for exploring novel intelligent human–machine interactions.

关键词： noncontact sensing piezoelectret multiple transmission media mechanical signal capture

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专利价值分析指标体系改进研究

科技进步与对策 2015年第5期32卷 117-121页

作者：肖国华牛茜茜南京大学信息管理学院江苏南京210093 中国科学院成都文献情报中心四川成都610041 中国科学院大学北京10004

在对专利价值分析指标体系分析的基础上,与专利质量评价记分牌法、Ocean Tomo 300th指数进行横向比较,从适用范围、操作流程和潜在市场三方面对专利价值分析指标体系进行评价,取长补短,结合3种方法的优点对专利价值分析指标体系提出改... 详细信息

在对专利价值分析指标体系分析的基础上,与专利质量评价记分牌法、Ocean Tomo 300th指数进行横向比较,从适用范围、操作流程和潜在市场三方面对专利价值分析指标体系进行评价,取长补短,结合3种方法的优点对专利价值分析指标体系提出改进建议。

关键词：专利价值专利分析指标体系比较研究

Design and Verification of Parallel Hip Exoskeleton Considering Output Torque Anisotropy

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Journal of Bionic Engineering 2024年第3期21卷 1305-1320页

作者： Jilong Xu Yunzhan niu Fucai Liu Engineering Research Center of the Ministry of Education for Intelligent Control System and Intelligent Equipment Yanshan UniversityQinhuangdao066004China Key Laboratory of Industrial Computer Control Engineering of Heibei Province Yanshan UniversityQinhuangdao066004China College of Mechanical Engineering Yanshan UniversityQinhuangdao066004China

In rehabilitation training,it is crucial to consider the compatibility between exoskeletons and human legs in ***,most exoskeletons today adopt an anthropomorphic serial structure,which results in rotational centers that are not precisely aligned with the center of the hip *** address this issue,we introduce a novel exoskeleton called the Parallel Hip Exoskeleton(PH-Exo)in this ***-Exo is meticulously designed based on the anisotropic law of output *** the friction of the drive components,a dynamic model of the human-machine complex is *** analysis demonstrates that PH-Exo not only exhibits outstanding torque performance but also achieves high controllability in both flexion/extension and adduction/abduction ***,a robust controller is designed to address model uncertainty,friction,and external *** experiments indicate that under the control of the robust controller,each motor achieves excellent tracking performance.

关键词： Hip exoskeleton Parallel mechanism Misalignment Anisotropy Output torque

An Asynchronous Variational Integrator for Contact Problems Involving Elastoplastic Solids

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Acta Mechanica Solida Sinica 2024年第2期37卷 305-315页

作者： Zongwu niu Zixiao Wang Yongxing Shen University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai200240China School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai200240China Department of Biostatistics Johns Hopkins Bloomberg School of Public HealthBaltimoreMaryland21205USA

Simulations of contact problems involving at least one plastic solid may be costly due to their strong nonlinearity and requirements of *** this work,we develop an explicit asynchronous variational integrator(AVI)for inelastic non-frictional contact problems involving a plastic *** AVI assigns each element in the mesh an independent time step and updates the solution at the elements and nodes *** asynchrony makes the AVI highly efficient in solving such bi-material *** advantage of the AVI,the constitutive update is locally performed in one element at a time,and contact constraints are also enforced on only one *** time step of the contact element is subdivided into multiple segments,and the fields are updated *** a contact event,only one element involving a few degrees of freedom is considered,leading to high *** proposed formulation is first verified with a pure elastodynamics benchmark and further applied to a contact problem involving an elastoplastic solid with non-associative volumetric *** numerical results indicate that the AVI exhibits excellent energy behaviors and has high computational efficiency.

关键词： Asynchronous variational integrator Plasticity Contact Computational efficiency Finite element method