Digital measurement of bone tumor volume by CT three-dimensional reconstruction technology

Objective To discuss the measurement of bone tumor volume on the basis of three dimensional images segmentation technology. Methods Twenty patients with lacunar bone tumor from Tianjin Hospital and Tongji Hospital were included in the

Application of Digital Technology in Road and Bridge Design

With the development and progress of science and technology,road and bridge design has experienced rapid development,from the initial manual drawing design to the popularity of Computer-Aided Design(CAD),and then to today’s digital software design era.Early designers relied on hand-drawn paper design forms which was time-consuming and error-prone.Digital support for road and bridge design not only saves the design time but the design quality has also achieved a qualitative leap.This paper engages in the application of digital technology in road and bridge design,to provide technical reference for China’s road and bridge engineering design units,to promote the popularity of Civil3D and other advanced design software in the field of engineering design and development,ultimately contributing to the sustainable development of China’s road and bridge engineering.

Application of digital technology in nasal reconstruction

Nasal defects are facial defects caused by trauma,tumors,or congenital diseases that seriously damage a patient’s physical and mental health.Nasal defects,from skin defects to total nasal defects,require surgical repair and reconstruction to restore the appearance and function of the nose,which have always been challenges for rhinoplasty.The development of digital technology has increased the possibility of nasal reconstruction.Digital technology is involved in the preoperative,intraoperative,and postoperative stages of nasal construction and is of great significance in improving the effect of this surgery.This article reviews the application of major digital technologies,including three-dimensional(3D)imaging technology,computer-assisted surgical navigation,and 3D printing,in nasal reconstruction and discusses the shortcomings of the current application of digital technology.

Physical model test and application of 3D printing rock-like specimens to laminated rock tunnels

Weak structural plane deformation is responsible for the non-uniform large deformation disasters in layered rock tunnels,resulting in steel arch distortion and secondary lining cracking.In this study,a servo biaxial testing system was employed to conduct physical modeling tests on layered rock tunnels with bedding planes of varying dip angles.The influence of structural anisotropy in layered rocks on the micro displacement and strain field of surrounding rocks was analyzed using digital image correlation(DIC)technology.The spatiotemporal evolution of non-uniform deformation of surrounding rocks was investigated,and numerical simulation was performed to verify the experimental results.The findings indicate that the displacement and strain field of the surrounding layered rocks are all maximized at the horizontal bedding planes and decrease linearly with the increasing dip angle.The failure of the layered surrounding rock with different dip angles occurs and extends along the bedding planes.Compressive strain failure occurs after excavation under high horizontal stress.This study provides significant theoretical support for the analysis,prediction,and control of non-uniform deformation of tunnel surrounding rocks.

Three-dimensional digital technology-assisted precise tumor resection and reconstruction of the femoral trochanter and postoperative functional recovery:a retrospective study

Background The trochanter of the femur is a common site for bone tumors.However,locating the specificboundary of bone tumor infiltration and determining the surgical method can be challenging.The objective of thisstudy was to review the diagnosis,treatment,and surgical outcomes of patients with tumors or tumor-like changesin the femoral trochanter after computer-assisted precise tumor resection and hip-preserving reconstruction ofthe trochanter.Methods From January 2005 to September 2020,11 patients with trochanteric tumors(aged:18–53 years;sixmales and five females)were treated in Guangzhou First People’s Hospital.The cases included aneurysmal bonecyst(n=1),giant cell tumor of bone(n=2),fibrous histiocytoma of bone(n=1),endochondroma(n=1),andfibrous dysplasia of bone(n=6).For patients with trochanteric tumors,computed tomography and magnetic resonance imaging scanning were performed before operation to obtain two-dimensional image data of the lesion.Athree-dimensional digital model of bilateral lower limbs was reconstructed by computer technology,the boundary of tumor growth was determined by computer simulation,the process of tumor resection and reconstructionwas simulated,and the personalized guide template was designed.During the operation,the personalized guideplate guided the precise resection of the tumor,and the allogeneic bone was trimmed to match the shape of thebone defect.Results All 11 patients underwent accurate resection of the tumor or tumor-like lesion and reconstruction ofthe hip.In eight cases,the lesion was confined to the trochanter,which was fixed with large segment allogeneicbone,autologous iliac bone,and proximal femoral anatomic plate.In three cases,allogeneic bone,autologousiliac bone,and femoral reconstruction nail were used to fix the tumor under the trochanter.Postoperative Xray examination showed that the repair and reconstruction of the bone defect was effective,and callus bridgingbetween the allogenic bone and autogenous bone was observed 6 months after operation.All patients recoveredtheir walking function 3–6 months after operation.The duration of the follow-up period ranged from 6 monthsto 6 years.A patient experienced recurrence of endochondroma;pathological examination revealed chondrocyticsarcoma.The remaining 10 patients were treated with segmental resection and reconstruction.The operationtime ranged 2.5–4.5 h(average:3.2 h).Intraoperative blood loss ranged from 300 to 500 ml(average:368 ml).The local recurrence rate was 9.1%,and the overall survival rate was 100%.The average Musculoskeletal TumorSociety score was 27(excellent and good for eight and three patients,respectively).Conclusions Three-dimensional computer skeleton modeling and simulation-assisted resection and reconstruction of femoral trochanteric tumor is a new surgical technique,which might markedly improve the surgical effect,shorten the surgical time,increase the overall survival rate of patients with tumors,reduce the local recurrencerate,assist in the digitization and programming of femoral trochanteric tumor surgery,and improve surgicalaccuracy.

Three-Dimensional Volumetric Analysis of Venous Malformations for Assessing the Effectiveness of Percutaneous Sclerotherapy

BACKGROUND Percutaneous sclerotherapy can be used to successfully treat venous malformations(VMs)of the head,neck,and limbs.However,the standard curative effect of sclerotherapy has rarely been analyzed,and there is currently no accurate statistical method to measure the volume of VMs after sclerotherapy.Here,we propose a novel threedimensional(3D)reconstruction method to evaluate this effect.OBJECTIVE To test the feasibility of 3D software(MIMICS 19.0)to evaluate the treatment effect of sclerotherapy.METHODS This retrospective study included patients with VMs on the head,neck,and limbs who were treated with ethanol sclerotherapy or foam sclerotherapy every 8 weeks.MIMICS 19.0 was used to calculate the performance of the lesion after treatment and measure the VM volumes before and after the treatment.The effect of the clinical treatment dose on the lesion was evaluated,and the treatment effect of each patient was recorded.The relationship between the number of treatments and the reduced volume of VMs was analyzed.RESULTS Based on the MIMICS-calculated regions of interest(ROI),we found that 1 mL of ethanol reduced the lesion by 473 mm3 and that one dosage of foam(1 mL of polidocanol and 4 mL air content)reduced the lesion by 2138 mm3,demonstrating that the foam sclerosing agent exhibited greater efficacy in this study.CONCLUSIONS The MIMICS 3D volume reconstruction method can effectively and safely evaluate the efficacy of sclerotherapy and provide a preoperative evaluation.This method is simple,accurate,and feasible.

Digital medical technology based on 64-slice computed tomography in hepatic surgery

Background With the rapid development of computer technology, digital medicine has become a new direction in surgery. The application of digital medicine in hepatic surgery is still at the early stage and less reported in the literature. The aim of this study was to apply digital medical technology in the context of hepatic surgery. Methods Data from 64-slice helical computed tomography of 17 patients, including 13 with hepatocellular carcinoma and 4 with hepatic hemangioma, were imported into independently developed medical image software program, segmentation and three-dimensional reconstruction were performed. The three-dimensional models were then processed with the FreeForm Modeling System. We used virtual surgical instruments to perform surgery on the models. Simulated surgeries included six hepatic segmentectomies, four left hemihepatectomies, three right hemihepatectomies for hepatocellular carcinoma, one hepatic segmentectomy, two stripping surgeries, and one irregular segmentectomy combined with stripping surgery for hemangioma. For resections involving more than three hepatic segments, total and residual functional hepatic volumes were measured before and after simulation surgery, and the resection ratio was calculated.Results The anatomy of the models was distinct and was used to localize lesions. We used virtual surgical instruments to perform simulated surgeries and used the models to optimize actual surgeries. We were able to minimize resection volume as well as surgical risk.Conclusions Digital medical technology is helpful in the diagnosis of hepatic disease and in optimizing surgical plans. Three-dimensional models can decrease surgical risk and help prevent postoperative hepatic failure.

数智化背景下信息技术与体育教学的深度融合研究

教育信息化不仅是时代发展的必然趋势,也是高度智能化环境下推动教育创新的重要动力。随着5G技术、大数据、人工智能等前沿技术的发展,社会正加速进入数字化智能时代。首先,通过深入分析相关文献,结合实际教学经验,对深度融合这一概念进行详细阐释,并总结信息技术与体育教学融合的优势;其次,分析在数智化背景下,两者融合过程所面临的挑战和问题;最后,探讨实现深度融合的具体路径。研究旨在解决当前高校体育教学中存在的实际问题,为理论研究提供新的视角和基础,为推进体育教学的数字化、智能化和信息化提供参考和借鉴。

数字赋能技术促进智力与发展性残疾儿童身体活动和健康的系统综述

目的系统综述数字赋能技术(DET)促进智力与发展性残疾(IDD)儿童身体活动和健康的效益。方法从PubMed、Embase、Web of Science、PsycINFO和中国知网中,检索2014年至2023年DET在IDD儿童身体活动中的应用相关文献,对文献进行质量评价,对高质量随机对照研究(RCT)进行系统综述。结果最终纳入8项RCT,来自中国、美国、意大利、韩国4个国家,涉及376例儿童,主要来源于智力残疾应用、发展性残疾研究、临床医学等领域期刊。发表时间主要集中在2018年至2023年。研究对象年龄7~18岁,涵盖智力残疾(包括唐氏综合征)、孤独症和其他发展性残疾。采用的技术包括可穿戴技术、移动健康指导和监测的云计算技术、虚拟现实和增强现实,以及动感游戏技术,设备包括主动视频游戏、Fitbit智能设备、Wii Fit平衡游戏、Stepmania节奏视频游戏、Xbox Kinect系统、VZFit传感器和CoTras认知康复电脑游戏等,虚拟身体活动包括拳击、田径、保龄球、乒乓球、沙滩排球、足球、棒球、滑雪、网球、高尔夫、飞镖、美式足球、射击、跳跃、慢跑和跳绳等。干预频率为每次20~45 min,每周1~5次,持续4~12周;在家庭、特殊教育学校和康复机构中进行。健康效益主要体现在提高身体活动水平、改善身体功能,以及提高运动功能和日常生活活动能力。结论将DET应用到身体活动领域,能提高IDD儿童在虚拟环境下、学校、社区以及康复机构中的身体活动参与水平,改善上下肢活动功能、粗大运动功能和肌肉力量,提高静态平衡功能、运动协调和感觉运动功能,减少久坐行为发生,提升认知、日常生活活动能力和社交能力。

数字技术、价值共创对品牌年轻化的影响

数字技术是实现企业“线上+线下”多样化发展,保证多方价值共创平台建立与维护,实现企业品牌年轻化的关键。本文将数字技术划分为数字技术实体应用和数字技术线上推广两个维度、将价值共创划分为C2C价值共创和B2C价值共创两个维度,运用问卷调查和回归分析的方法,探讨数字技术与价值共创对品牌年轻化的影响机制。研究表明:数字技术实体应用、数字技术线上推广对品牌年轻化和价值共创均有显著的正向影响;价值共创在数字技术与品牌年轻化的关系之间发挥中介作用。因此,应完善数字技术基础设施建设,大力推动企业数字化转型,并积极搭建品牌共创平台,重视共创平台维护,加强平台合作与互动,识别绑定忠实消费群体。

数字技术赋能体育教育评价转型:内涵、动力、问题与策略

推进数字技术赋能体育教育评价转型是数字时代教育样态转型的新趋势,是实现中国式体育教育现代化的新赛道。运用文献资料法、访谈法、逻辑分析法,以技术嵌入理论为视角对数字技术赋能体育教育评价转型的内涵进行剖析,并探讨转型中的动力、问题与策略。研究认为:数字技术赋能体育教育评价转型需明确转型坐标系,进而通过要素重构与结构重建,实现功能重塑;其动力涵盖了体教政策的牵引力、教育转型的传导力、数字技术的支撑力、标准升级的驱动力与数据矫正的内需力。与此同时,数字技术赋能体育教育评价转型仍存在技术嵌入层面的算法偏见与伦理挑战、评价改革层面的制度缺位与路径依赖、推广应用层面的数字鸿沟与囚徒困境等问题,应通过补齐技术短板、优化制度框架、突破应用瓶颈三方面靶向策略实现高质量转型。

新技术驱动下高校体育美育课程体系数字化转型研究

当前社会,随着科技的飞速发展,新技术正在深刻地改变着人们的生活方式、工作方式、教育方式。对于高校体育美育课程体系而言,数字化转型不仅能够提升教学效率、丰富教学手段、增强学生的参与度,还能促进个性化学习、提高教学质量,最终实现教育公平与高质量教育的目标。该文基于新技术驱动,对高校体育美育课程体系数字化转型进行探究,希望为高校体育教学质量提升提供帮助。

互联网使用对农村居民身心健康的影响——基于CGSS2021数据的实证研究

【目的】探究互联网使用对农村居民身心健康的影响及其作用机制。【方法】基于2021年中国社会状况综合调查(CGSS)数据,采用有序Logit、广义有序Logit、工具变量、中介效应等方法进行实证分析。【结果】互联网使用对农村居民的身体和心理健康均具有显著的正向影响,互联网使用对身体健康的影响大于对心理健康的影响。互联网使用对农村居民身体和心理健康的正向影响在性别、年龄、社会经济地位、区域经济水平等维度上存在异质性。互联网使用通过促进农村居民的休闲娱乐、社会网络和知识获取对其身体和心理健康产生正向影响。【结论】建议提高农村互联网普及率和网络质量,丰富面向农村居民的信息终端和服务供给,提升农村居民的数字素养。

高校体育专业人才培养的虚拟智慧平台构建探究

在如今数字化信息化的浪潮下,以ChatGPT、元宇宙、大数据、虚拟智能设备等为代表的主流高新技术的风靡,为高校体育专业人才培养模式的变革带来了新的契机。该文以此为切入点,深入考察当下主流信息技术的发展态势和技术特点,探析高校体育教学融入数字化信息化技术的可能性和挑战性,探索构建高校体育专业人才培养的虚拟智慧平台的基本框架,以期为高校体育专业人才培养数字化赋能提供有益参考。

教育数字化背景下体育教师转型的动因、挑战及应对

教育数字化共识促使学校体育数字化革新持续加速,意味着推进教育数字化背景下体育教师的转型,发展体育教师数字化教学能力成为时代所需。运用文献资料法、逻辑分析法对教育数字化背景下我国体育教师转型的动因、挑战及应对进行分析。认为,数字中国战略实现、学生数字素养培育、学校体育数字治理是促成教育数字化背景下体育教师转型的重要动因。但是,当下理念“认同感”淡薄、平台“落差感”凸显、制度“保障感”赢弱、育人“危机感”加强、成果“获得感”式微桎梏教育数字化背景下体育教师的转型。促成教育数字化背景下体育教师转型,需要从职前培训、政策设计、平台搭建、伦理遵守、成果应用维度精准化确定相关举措,从而为其转型的有效治理提供思路借鉴与参考。

数字赋能学校体育评价工作的优势、挑战与进路

数字技术已经成为助力行业持续发展和转型升级的新动能,越来越多的行业或领域运用数字技术进行数字化转型。若将数字技术嵌入到学校体育评价工作中,发挥其技术优势,或许能够为学校体育评价工作发展提供新的思路。本文运用文献资料、逻辑分析等研究方法,对数字技术应用于学校体育评价工作的先天优势、潜在挑战和实践进路进行剖析。研究结果表明:数字技术具有数字化、网络化、智能化、共享化、抓取化、可筛选化、去中心化等典型特征,这些特征对于改善学校体育评价工作中所产生的“评价导向过于追求量化、评价主体一元中心化明显、评价过程信息透明度不足”等问题具有先天优势。将数字技术应用到学校体育评价工作中,还具有“数字技术的广泛应用尚有限制、数字技术会导致学校体育评价主体角色的转变、数字技术会推动学校体育评价方法的革新”三个方面的潜在挑战。据此,建议:从“形成‘使用数字技术’的社会共识、整合评价标准与优化信息录入相结合、以科学方式确立评价比重和指标体系”三个方面共同推动学校体育评价工作的数字化转型。

数智技术助推体育教育高质量发展的动力、阻碍与路径研究

本文采用文献资料法、逻辑分析法等研究方法,主要对数智技术助推体育教育高质量发展的动力、存在的阻碍及突破路径进行研究。结果发现,数智技术助推体育教育高质量发展的动力体现在教学资源、教学过程、教学内容、教学评价4个维度上。数智技术助推体育教育高质量发展的制约因素被划分为一阶障碍和二阶障碍。其中,一阶阻碍包括模式普及困难、体育教师数字化素养不足、数据共享机制尚未完善;二阶阻碍包括风险规避倾向、技术规避行为。据此,提出突破路径:实行各层面各等级的体育教育数字化转型试点;优化体育教师数字素养培训的供给侧,提升体育教师数智技术应用能力;强化体育教师对数智技术的价值认知和行为动力;完善数据资源共享底座,筑牢数据安全护栏。

人工智能赋能体育教育公平的关键维度、约束限度与实践向度

体育教育作为我国国民身体素养与国家富强的基石,其公平性一直备受瞩目,而人工智能的快速发展与广泛应用则为推动新时代我国的体育教育公平提供了新机遇。采用文献研究法、逻辑分析法等,遵循“搭建分析框架—厘清耦合动力—阐释辩证关系—提出实践进路”的思路,分析人工智能赋能体育教育公平的关键维度、约束限度与实践向度。研究认为:体育教育公平包括平等性、补偿性和差异性公平,在智能体育教学、评估、管理、辅导和仿生工具的支持下,经由政策、技术产业和现实驱动促进了人工智能与体育教育公平深度耦合。人工智能通过完善整体性、强化弥补性和精确个性化体育教育资源分别助推了平等性、补偿性和差异性公平。针对人工智能基础设施缺失、师生数字素养欠佳和实践应用不当引发的技术享有与使用差距,提出人工智能赋能体育教育公平的实践向度:优化体育教育公平制度,保障人工智能基础设施均等化;提升师生数字素养,消解人工智能使用的数字鸿沟;科学应对使用风险,释放人工智能赋能的公平效能。

能源电池单体层级数字孪生技术

具有高能量密度的能源电池作为实现国家碳达峰和碳中和目标的重要途径备受关注,然而,现有技术已不能满足其高效安全稳定运行的迫切需求。数字孪生技术具有实时感知、高效模拟、准确预测和快速优化复杂系统的特性,有望成为解决上述挑战的有效手段。本文分析了能源电池单体层级数字孪生技术的构成要素,阐述了植入传感技术、高效保真的物理模型和机器学习算法三种关键技术在电池数字孪生中的作用,介绍了植入传感技术在电池温度、应变、气压和气体传感方面的现状,综述了描述电池不同物理场行为的耦合模型的相关研究,探讨了机器学习算法在电池数字孪生中的应用以及基于物理的机器学习算法的最新进展,最后总结了电池数字孪生技术面临的主要挑战和发展趋势,并提出了在未来研究中克服这些挑战的建议。本研究工作可为电池数字孪生技术提供更深刻的见解,并有助于其在学术研究和工业应用领域中的进一步推广与应用。

天然采光优化为导向的智能遮阳调控发展与方法

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