改进TCD算法的疲劳寿命预测研究

在实际工程领域中,零件的疲劳破坏给工程界带来了难以计量的损失。所谓疲劳,是指零件在承受远低于其屈服极限的循环载荷时突然失效的情况。疲劳问题一直受到广泛关注,关键距离法(TCD算法)最初由Taylor等人提出,该理论将试件缺口附近区域某点,线上的应力特征值作为疲劳失效判断准则。拟选用疲劳试验机对45#钢缺口试样在四种应力级下进行疲劳试验,对45#钢缺口试样的疲劳性能进行了试验研究。同时运用了传统TCD算法以及改进TCD算法对45#钢缺口试样的疲劳寿命进行了预测,与实验结果进行比较,改进的TCD算法相对于传统TCD算法获得的预测结果更令人满意。从而为工程上缺口构件的疲劳寿命预测提供了理论计算方法。

Discussion on the Status Quo of Non-Destructive Testing Technology in Highway Engineering and Strategies of Improving the Quality of Testing

Highway test and detection technology play a very important role in controlling the quality of road and bridge engineering and improving the maintenance of roads and bridges.The study of highway bridge test detection technology is both theoretically and practically useful.Road and bridge test and detection is a complicated task.With the development of science and technology,highway and bridge engineering test and detection technology has also made great progress.The continuous improvement of test and detection technology has brought good social benefits to road and bridge construction.This article discusses the problems in test and detection technology of highway bridges and how to improve the quality of test and detection.

Analysis of the Effectiveness of Modified Non- Traumatic Filling Technology in the Treatment of Pediatric Dental Caries

Objective:To analyze the effectiveness of modified non-traumatic filling technology in the treatment of pediatric dental caries.Methods:Ninety-seven children with dental caries who were treated in our hospital(Panyu Maternal and Child Care Service Center of Guangzhou)from January 2022 to December 2023 were selected and randomly divided into two groups,with 48 cases in the experimental group and 49 in the control group.The experimental group was treated with modified non-traumatic filling techniques,while the control group was treated with conventional filling techniques.Observation indicators such as the total effectiveness of the treatment,incidence of adverse events,treatment compliance,and pain scores were analyzed after the intervention.Result:After intervention,the total effectiveness of the treatment in the experimental group was higher than that in the control group(P<0.05).The incidence of adverse events in the experimental group was lower than that of the control group(P<0.05).The treatment compliance of patients in the experimental group was higher than that in the control group(P<0.05).The pain score of the experimental group was lower than that of the control group(P<0.05).Conclusion:The application of modified non-traumatic filling technology in the treatment of pediatric dental caries showed good therapeutic outcomes.After the intervention,the child’s symptoms were significantly alleviated,the incidence of adverse events such as filling material falling off was reduced,their compliance was improved,and the pain was relieved.This procedure is worth to be promoted for clinical application.

Research on the Construction of Group Elderly Care Service Platform Based on IoT Technology

Internet of Things(IoT)technology is widely used in various fields,and its application in elderly care services has been highlighted in recent years.This study aims to explore how IoT technology can improve the efficiency of group-based elderly care services.The concept,characteristics,and current application status of IoT technology in elderly care services were introduced.Secondly,the characteristics and needs of group elderly care services were analyzed,including advantages and challenges,as well as the expectations and needs of the elderly for elderly care services.The evaluation methods and future development directions of IoT technology in improving the efficiency of group elderly care services were discussed,including data collection and analysis methods,selection and measurement of efficiency evaluation indicators,challenges,and development directions.

Transforming Molecules into Medicines: Role of CDMOS in Phase-Appropriate Technology Transfers in Advancing Pharmaceutical Innovation

CDMOs are emerging as critical drivers of innovation within the pharmaceutical and biotech industries. As the pharmaceutical industry continues to evolve, we can expect to see CDMOs play an increasingly important role in drug development and manufacturing. Many companies within these sectors are now leveraging the expertise of CDMOs through technology transfers to foster innovation and enhance the development of new drug products. In the extensive field of drug development, technology transfer plays a crucial role at multiple stages, ranging from preclinical phases to commercialization. By working closely with drug developers, CDMOs can ensure that technologies are transferred seamlessly between phases of drug development, allowing for a more efficient and cost-effective development process. CDMOs also bring a wealth of experience in various areas of drug development, including process development, analytical testing, quality control, and manufacturing. This expertise, combined with a focus on innovation, can help drug developers to overcome technical challenges and optimize their drug development programs. CDMOs can provide drug developers with various manufacturing capabilities, from small-scale clinical trials to large-scale commercial production. This flexibility allows drug developers to focus on their core competencies while relying on CDMOs to provide the necessary infrastructure and support for drug manufacturing. The critical role of CDMOs in advancing pharmaceutical innovation in phase-appropriate technology transfer where there will be a lot of effort and patience with strong technical expertise is required. This article explores the various types of Technology transfer from preclinical to commercial stages and successful strategies to foster innovation.

How to Optimize the Management of Science and Technology Funds in Colleges and Universities Based on the Policy of Streamlining Administration,Delegating Powers,Improving Regulation,and Strengthening Services

To advance the field of science and technology,we need to revitalize the development of science and technology through innovation.The development of science and technology has many beneficial implications on the revitalization of the country.For this reason,universities in China should give full attention to their role as the main propeller of science and technology.“Streamlining administration,delegating powers,improving regulation,and strengthening services”is a policy issued by the Chinese government for the management of science and technology funds in colleges and universities.Based on the policy of“streamlining administration,delegating powers,improving regulation,and strengthening services,”colleges and universities must optimize the management of science and technology funds for their efficient use.In this paper,we analyzed the importance of the policy and put forward an effective management strategy,aiming to improve the management of science and technology funds in colleges and universities.

地基处理技术现状与发展

近年来我国的基础设施建设规模不断扩大,坚实的地基是确保工程建设安全与韧性的关键。因此,地基处理技术与工程品质之间的关联性愈发受到关注,这促进了地基处理技术的持续进步与发展,进而不断涌现出新的理论、技术和设备。文章简要阐述了地基处理的分类方法与发展特点,回顾了各类地基处理技术的研究现状,具体介绍了近年来复合地基技术、排水固结法、土工合成材料、高聚物注浆、固化剂、特殊土地基、大面积高填方地基和抗震地基处理技术等方面的新进展,归纳总结了地基处理智能设备、设计理论、评价方法和规范编制的发展情况。在现阶段信息化浪潮不断来袭、可持续发展作为永恒主题的新形势下,提出了地基处理技术应不懈追求“韧性、绿色、智能、人文”的品质提升的核心议题,探讨了地基处理行业各个方面的发展方向与未来展望,以期为地基处理领域的研究与技术人员提供参考和借鉴。

高质量发展下中国工业企业碳减排路径选择

管理改进与技术创新是工业企业实现高质量减排的两大关键路径。运用Shapley值分解方法实证测度了技术创新与管理改进对工业企业碳减排技术进步效率的贡献作用。结果发现,整体上技术创新与管理改进的贡献率分别为28.45%和71.55%,并且二者贡献率在不同类型特征企业之间存在明显差异。随着企业技术进步水平、雇佣规模和能耗水平的提升,技术创新的贡献率逐步递减,而管理创新的贡献率则呈现递增趋势。首次对企业管理改进与技术创新对碳排放效率的贡献进行测度,为优化“双碳”目标政策与指导企业减排行动提供有益参考。

The Impact of Information Technology on Service Quality,Satisfaction,and Customer Relationship Management(Case Study:IT Organization Individuals)

Recent research and studies have shown that Information Technology(IT)has a significant impact on service quality,customer satisfaction,and customer relationship development.With the proliferation and penetration of technology in all aspects of life,organizations are responding to the implications and opportunities that IT creates in relation to customer services.The main objective of using information technology in organizations is to increase customer satisfaction,service quality,and customer relationship management,which the authors will focus on here.Enhancing service quality,improving customer satisfaction,and establishing close and sustainable customer relationships are key advantages of leveraging information technology in this field.This article examines the impact of information technology on service quality,customer satisfaction,and customer relationship development and provides strategies and models for organizations to improve customer satisfaction and establish closer connections with them through the use of information technology.Seventy individuals from the IT field were used to evaluate the proposed model.The proposed model was compared with three models:SEM,regression,and decision tree,and the results demonstrated better performance of this approach.

新时代我国发起成立国际科技组织:机理、问题与路径

在科技自立自强成为国家发展战略目标与任务的大背景下,“发起成立国际科技组织”作为新时代我国国际科技交流合作新的重要形态,能够使我国在激烈的国际科技竞争中掌握战略主动。基于机理分析,我国发起成立的国际科技组织在组织属性、组织行为等维度上应具备实体化、公共化、国际化、法制化等基本要件。针对存在的主要问题,我国需要制定相关战略性整体规划、营造更开放的政策环境、出台更细化的成立审批要求和流程。在路径选择上,我国发起成立国际科技组织应遵循坚持独立自主、用好国际资源、选准学科领域、使用战略科学家等根本原则,同时,应基于自身优势和战略需求、突出组织特色和互补能力,通过组织创新的价值体现避免出现组织拥挤现象。

Education and Ecological Innovation Empowered by Technology:Innovation Practices in Inner Mongolia Universities

This study aims to conduct a thorough analysis of the core elements of educational innovation in Inner Mongolian universities and their mechanisms for enhancing educational quality.By examining technological applications,innovative teaching models,and the educational ecosystem,this paper explores the ways in which technological empowerment enhances students’learning experiences,the impact of innovative teaching models on educational quality,and the practical outcomes of ecological innovation theory in education.Additionally,relevant recommendations are provided for the future development trends of educational innovation in Inner Mongolian universities.

冲击破岩钻井提速技术研究现状与发展建议

提高钻井速度不仅是提高我国油气效益开发及深地勘探等方面的重要技术手段,同时对保障国家能源安全意义重大。冲击破岩钻井技术在国内外油田现场应用并获得了良好的提速效果,持续开展此类技术攻关有望攻克当下我国深地高温高压硬岩地层进尺低、提速难的技术痛点。介绍和分析了轴向冲击、扭力冲击和轴-扭耦合冲击辅助钻头破岩钻进技术方面的实践及发展动态。结合冲击破岩钻井技术现状,阐明了冲击辅助钻头破岩力学原理是冲击破岩钻井提速技术的关键问题,综述了国内外研究学者在冲击辅助钻头破岩物理实验、理论模型和数值模拟等研究方法上取得的科学进展。针对冲击破岩钻井提速技术的发展提出了相关建议,即加强在材料结构优化设计、智能化控制、多元技术融合和井场应用优化等方面的研究力度,为我国能源高效开发做出贡献。

工程教育认证理念下电力电子技术课程思政教学改革研究

在浙江理工大学电力电子技术课程学情基础上,引入工程教育认证理念,提出电力电子技术课程思政教学改革思路和方法。首先制定融合工程教育认证理念和课程思政的教学新目标,其次根据思政教育新目标对电力电子技术的教学内容进行改革,接着提出电力电子技术课程思政教育的教学新方法,最后引入多元考评手段,形成有效的持续改进机制。通过电力电子技术课程思政教育教学改革,力求达到思想教育润物无声的效果。

红土镍矿酸浸渣综合利用进展

近年来随着不锈钢及新能源用镍需求的增长,红土镍矿湿法提镍工艺得到更多应用,相应的红土镍矿酸浸渣堆存量也迅速增加,对此类固废进行科学消纳和资源综合利用迫在眉睫。针对红土镍矿酸浸渣有害元素硫、有价金属铁含量高的特点进行综合利用新技术、新装备研究对红土镍矿湿法冶金工业的持续发展具有重要的理论和现实意义。主要介绍红土镍矿酸浸渣的湿法冶金形成过程及其成分组成和物理化学性质,较为系统地梳理了红土镍矿酸浸渣在尾矿坝堆积、地下压滤回填和深海填埋等直接处理方法,提取利用铁、铬、铝、稀土等有价金属资源,消纳制备硅藻土、陶粒、矿物纤维等建筑材料、制备锂电池电极、沸石等高附加值材料综合利用技术上的研究进展,展望了红土镍矿酸浸渣流态化提铁降硫技术及装备的发展前景。

考虑可再生能源接入的多端MMC交直流混合系统协调控制

模块化多电平变换器的零转动惯量特性,使其无法对交流电网的频率波动提供支撑,导致交直流混合系统的整体惯性下降,影响并网系统的动态性能与稳定性。文章将改进功率-电压下垂控制与虚拟同步机技术相结合,提出一种新型功率协调控制策略。在系统直流电压稳定的情况下,对交流电网进行频率调节,同时对各变换器间的功率进行合理分配,无需通讯系统即可建立有效的能量管理体系。与传统双闭环控制进行对比试验,结果表明,所提控制策略有效解决了系统由低惯量、欠阻尼引起的动态性能与稳定性的问题。

基于多源数据和改进链路预测的新能源汽车技术机会研究

[研究目的]在绿色低碳发展的背景下,旨在识别新能源汽车领域的技术机会,为未来新能源汽车的技术研发与商业化方向提供借鉴参考,助力新能源汽车的发展。[研究方法]搜集反映新能源汽车领域基础研究、应用研究和商业化的多源数据,采用三螺旋模型,将基于改进链路预测方法得到的预测结果“节点链”进行融合对比分析,得到最终细化的新能源汽车技术机会。[研究结论]验证了基于多源数据融合思想和改进链路预测的方法识别新能源汽车技术机会的可行性。研究结果表明:新能源汽车未来技术机会主要集中在动态无线充电技术、磁悬浮技术与自动驾驶技术的结合;通过碳化硅材料等改进的驱动技术;通过光催化等改进的电池技术;制氢与车载储氢等。

当代北京农村饮水改良的历史考察

北京郊区农村受到地理环境的影响,广大农民长期存在取水难、用水难、饮水卫生难的情况。新中国建立以来,党和政府将农村饮水改良作为保护农民群众身体健康、改善农村卫生环境的重要工作,聚焦当代北京农村民众日常饮水改良问题的“水历史”,探究“水历史”背后的政策发展、民生实践与社会变革,不仅能够纵向考察中国共产党的民生建设政策的发展变迁,横向考察不同历史阶段农村社会的水资源取用技术变革、日常卫生观念的革新等问题,而且可以将中共治国理政的政策发展与民生建设、人民生活状况的发展变革结合起来,综合分析中国共产党坚持不懈地改善民生的大历史脉络。

改良经皮原位回针垂直褥式缝合对颏部外伤愈合及瘢痕形成的影响

目的评价改良经皮原位回针垂直褥式缝合(MBVMS)技术对颏部伤口愈合及瘢痕形成的影响。方法选择2017年2月至2023年6月就诊于首都医科大学附属北京安贞医院整形外科急诊的90例颏部外伤患者,按照随机数字表法分为观察组(n=45)和对照组(n=45),清理创面后观察组患者采用改良MBVMS闭合创面,对照组患者采用常规美容缝合闭合创面,2组患者拆线后均外用硅酮凝胶祛疤药膏约3个月。观察2组患者7 d后拆线时的伤口愈合情况,运用温哥华瘢痕量表(VSS)、视觉模拟量表(VAS)、观察者瘢痕评估量表(OSAS)、患者瘢痕评估量表(PSAS)评估2组患者术后3、6个月时的瘢痕形成情况。结果术后7 d拆线,观察组患者伤口甲级愈合44例(97.8%),乙级愈合1例(2.2%);对照组患者伤口均为甲级愈合。观察组与对照组患者甲级愈合比例比较[97.8%(44/45)比100.0%(45/45)],差异无统计学意义(P>0.05)。术后3、6个月,观察组VSS、VAS、OSAS及PSAS评分均低于对照组,差异均有统计学意义(均P<0.05)。结论改良MBVMS技术应用于颏部外伤患者中,可在保证伤口安全愈合的同时,有效改善伤口愈合后瘢痕的性状,减少术后瘢痕增生,达到良好的美容效果。

东北地区白浆土耕层地力特点分析与改良技术

自20世纪70年代我国陆续开展白浆土改良科研与技术实践工作以来,历经50多年的努力,白浆土改良已经初见成效,东北地区的白浆土改良作为黑土地资源保护的重要工作之一,对于恢复耕地地力、提升农业产量意义重大。该文重点论述了东北地区白浆土分布情况、耕地土层结构及理化特征以及对农业生产产生的不利影响,并提出了白浆土改良专项技术策略。

新时期汽车维修技术质量提高的方法

本研究为了探索提高汽车维修技术质量的有效方法,确保行业能够适应技术进步和市场需求的变化。研究内容涵盖了汽车维修检测相关方法,采取加强电子诊断技术的应用、引进先进维修设备、强化人员管控以及构建监督管理机制等关键策略,确保能够有效提升维修工作的精确度和效率,进而显著提高汽车维修服务的整体质量和顾客满意度。以此推动汽车维修行业的技术进步和服务优化,具有重要的实践和理论价值。