矿用卡车AMT齿轮传动系统可靠性分析

为较准确预测矿用卡车(automated manual transmission,AMT)变速器齿轮传动系统的动态可靠性,考虑关键构件的柔性及内外部载荷激励的影响,构建了AMT齿轮传动系统刚柔耦合动力学模型,针对服役频次高或载荷恶劣的变速器六挡和七挡传动系统进行了动载荷分析。在此基础上,考虑传动系统载荷动态变化、零件强度退化和各零件之间失效的相关性,对该AMT变速器六挡和七挡传动系统的动态可靠性进行研究,找到了该AMT变速器传动系统的薄弱零部件环节,获得了传动系统及其零部件的可靠度随服役时间的变化规律,为矿用卡车AMT变速器齿轮传动系统的可靠性设计及性能提升奠定了基础。

基于深度学习的AMT智能地质解译技术

在砂岩型铀矿勘探中,开展音频大地电磁法(Audio Magnetotelluric Method,AMT)测深能够有效地获得深部砂体发育范围、基底隆凹形态等与铀成矿相关的地质信息。其测量成像结果包含的地质意义往往需要通过主观地质推断后才能为后续地质勘探工作提供支撑,解译结果严重依赖解译人员的地质认知和专业经验。与此同时,随着三维AMT测量技术的发展,人工地质解译的效率较为低下。文章以砂岩型铀矿成矿环境为基础,采用随机电阻率模型构建AMT图像样本库,并建立U-net网络开展砂体、基底等岩性识别训练,从而实现智能推断反演电阻率体中的砂体和基底。通过与人工解译结果对比,智能解译结果匹配程度较高,解译时间大大缩短,表明该方法在砂岩型铀矿勘探中具有较好的应用前景。

基于GMT脚本的AMT数据曲线图批量绘制方法与应用研究

AMT法观测天然交变电磁场,通过数据处理和反演可获得地下介质的电性分布特征,近年来得到了广泛应用。AMT数据曲线图包括测点信息、视电阻率和阻抗相位曲线及数据,可直观反映测点数据质量和曲线类型,是重要的原始资料。加拿大Phoenix Geophysics公司的MTU-5A和V8大地电磁仪是国内最常见的AMT仪器,原始数据经预处理,用MT-Editor软件编辑后可以批量导出PLT格式文件,使用awk命令可从PLT文件中提取测点信息和视电阻率、阻抗相位数据,利用GMT绘图软件将测点信息和数据绘制成图,结合循环语句可达到批量成图的目的。AMT数据曲线图可应用于原始数据质量评价和AMT测深曲线类型判别,在工作区地电规律研究中具有重要意义。

基于多目标粒子群与模糊控制的AMT自适应换挡规律研究

搭载自动机械变速器(AMT)的车辆,其换挡规律是提升动力性与经济性的关键.本文以3挡AMT纯电动城市客车为研究对象,基于多目标粒子群算法(MOPSO)对不同加速踏板开度下的换挡车速进行优化,建立了兼顾动力性与经济性的双参数MOPSO换挡规律,并构建了以车辆载荷与加速度变化为输入,车速调整量为输出的模糊控制器对MOPSO规律进行自适应调整,得到了自适应换挡规律Fuzzy-MOPSO.最后,对Fuzzy-MOPSO规律开展了动力性与经济性验证,并与其他换挡规律进行比较.结果表明,Fuzzy-MOPSO规律的加速性能比经济性规律提升了15.3%,其动力性能比MOPSO规律更优越.经济性方面,在4段实际道路工况下,Fuzzy-MOPSO规律的经济性比动力性规律分别提升了6.08%、7.28%、6.88%、5.63%,比MOPSO规律更具节能潜力.此外,Fuzzy-MOPSO规律在实际道路工况下的换挡频率与MOPSO规律相当,节能的同时能够有效抑制频繁换挡,提升传动系统的寿命.

A frequency servo SoC with output power stabilization loop technology for miniaturized atomic clocks

A frequency servo system-on-chip(FS-SoC)featuring output power stabilization technology is introduced in this study for high-precision and miniaturized cesium(Cs)atomic clocks.The proposed power stabilization loop(PSL)technique,incorporating an off-chip power detector(PD),ensures that the output power of the FS-SoC remains stable,mitigating the impact of power fluctuations on the atomic clock's stability.Additionally,a one-pulse-per-second(1PPS)is employed to syn-chronize the clock with GPS.Fabricated using 65 nm CMOS technology,the measured phase noise of the FS-SoC stands at-69.5 dBc/Hz@100 Hz offset and-83.9 dBc/Hz@1 kHz offset,accompanied by a power dissipation of 19.7 mW.The Cs atomic clock employing the proposed FS-SoC and PSL obtains an Allan deviation of 1.7×10^(-11) with 1-s averaging time.

AMT手动挡锁挡控制策略研究

为实现纯电动商用车机械式自动变速箱(AMT)适应复杂行驶工况,可通过整车控制器(VCU)控制变速箱进行手动挡锁挡控制。通过使用比例积分(PI)调节的控制方式对电机扭矩进行限制,从而将驱动电机的转速控制在限值之内。然后基于控制器局域网(CAN)标定协议(CCP)进行在线标定,截取相应的报文数据进行分析,验证其功能。试验结果显示,文章的控制方法能够实现车辆的手动挡锁挡功能,电机转速波动范围在±20r/min之内,且车身无抖动现象,具有较好的驾驶平顺性。

Development and technology status of energy storage in depleted gas reservoirs

Utilizing energy storage in depleted oil and gas reservoirs can improve productivity while reducing power costs and is one of the best ways to achieve synergistic development of"Carbon Peak–Carbon Neutral"and"Underground Resource Utiliza-tion".Starting from the development of Compressed Air Energy Storage(CAES)technology,the site selection of CAES in depleted gas and oil reservoirs,the evolution mechanism of reservoir dynamic sealing,and the high-flow CAES and injection technology are summarized.It focuses on analyzing the characteristics,key equipment,reservoir construction,application scenarios and cost analysis of CAES projects,and sorting out the technical key points and existing difficulties.The devel-opment trend of CAES technology is proposed,and the future development path is scrutinized to provide reference for the research of CAES projects in depleted oil and gas reservoirs.

AMT控制器电磁发射干扰特性研究

基于GJB 151B—2013中对军用设备和分系统的电磁发射要求,以某型号AMT控制器为研究对象,进行AMT控制器电磁发射干扰特性分析,开展CE102电源线传导发射试验和RE102电场辐射发射试验。试验结果表明:试验用AMT控制器的电源线传导发射和电场辐射发射均满足GJB 151B—2013的电磁发射要求,电源正线和电源负线的电磁传导发射情况基本一致,均存在以50 Hz为基波的多次谐波干扰,在50 Hz处安全裕度最小,约为10 dBμV;经屏蔽处理后的AMT控制器在垂直极化和水平极化两种天线状态下的电磁辐射情况基本一致。为进一步提高AMT控制器电磁发射干扰的安全裕度,既要在电源线端口处采取以50 Hz为基波的多次谐波干扰抑制措施,同时还要对AMT控制器上的孔缝、接口以及线缆进一步采取屏蔽防护措施。

矿用防爆无轨胶轮车用AMT技术探讨

介绍了矿用防爆无轨胶轮车用变速箱的使用现状及需求,结合工程机械常用的自动变速箱系统的特点,对其性能进行比较。根据比较结果,着重分析了机械式自动变速箱(AMT)的优缺点和国内外发展现状。根据防爆无轨胶轮车的发展趋势和煤炭市场的使用需求,综合论述了AMT在矿用防爆无轨胶轮车上推广使用的可行性及重要意义;并分析了AMT在矿用防爆无轨胶轮车上的应用前景及市场需求。

物探AMT法在矿山工程地质勘查中的应用

伴随着国内社会经济的不断发展,诸多基础建设的工程项目数量越来越多。在这些工程项目中,矿山工程地质勘查工作最为重要,因为它直接关系着我国矿产资源的开采量,决定了资源经济效益的发挥水平。矿山工程地质勘查工作中,常常会遭遇到较多不良地质体,比如断层、岩溶、暗河等,在矿山工程地质勘查时,如果没有提前预警并且应用合理方法展开处理,必定会加大安全事故发生概率。要想避免这些问题产生,应当注重应用物探AMT技术,如此能够有效避免不良地质体。本文接下来将会对此展开分析,希望为工程人员提供参考。

Development status and prospect of underground thermal energy storage technology

Underground Thermal Energy Storage(UTES)store unstable and non-continuous energy underground,releasing stable heat energy on demand.This effectively improve energy utilization and optimize energy allocation.As UTES technology advances,accommodating greater depth,higher temperature and multi-energy complementarity,new research challenges emerge.This paper comprehensively provides a systematic summary of the current research status of UTES.It categorized different types of UTES systems,analyzes the applicability of key technologies of UTES,and evaluate their economic and environmental benefits.Moreover,this paper identifies existing issues with UTES,such as injection blockage,wellbore scaling and corrosion,seepage and heat transfer in cracks,etc.It suggests deepening the research on blockage formation mechanism and plugging prevention technology,improving the study of anticorrosive materials and water treatment technology,and enhancing the investigation of reservoir fracture network characterization technology and seepage heat transfer.These recommendations serve as valuable references for promoting the high-quality development of UTES.

6G New Multiple Access Technology

As a basic technology at physical layer of mobile communications,non-orthogonal multiple access has been attracting wide attention across the academia and the industry.During the standardization of the fifth-generation(5G)of mobile communications,3GPP conducted preliminary study on non-orthogonal multiple access without reaching the consensus to standardize the technology.

Diagnosis and treatment of refractory infectious diseases using nanopore sequencing technology:Three case reports

BACKGROUND Infectious diseases are still one of the greatest threats to human health,and the etiology of 20%of cases of clinical fever is unknown;therefore,rapid identification of pathogens is highly important.Traditional culture methods are only able to detect a limited number of pathogens and are time-consuming;serologic detection has window periods,false-positive and false-negative problems;and nucleic acid molecular detection methods can detect several known pathogens only once.Three-generation nanopore sequencing technology provides new options for identifying pathogens.CASE SUMMARY Case 1:The patient was admitted to the hospital with abdominal pain for three days and cessation of defecation for five days,accompanied by cough and sputum.Nanopore sequencing of the drainage fluid revealed the presence of orallike bacteria,leading to a clinical diagnosis of bronchopleural fistula.Cefoperazone sodium sulbactam treatment was effective.Case 2:The patient was admitted to the hospital with fever and headache,and CT revealed lung inflammation.Antibiotic treatment for Streptococcus pneumoniae,identified through nanopore sequencing of cerebrospinal fluid,was effective.Case 3:The patient was admitted to our hospital with intermittent fever and an enlarged neck mass that had persisted for more than six months.Despite antibacterial treatment,her symptoms worsened.The nanopore sequencing results indicate that voriconazole treatment is effective for Aspergillus brookii.The patient was diagnosed with mixed cell type classical Hodgkin's lymphoma with infection.CONCLUSION Three-generation nanopore sequencing technology allows for rapid and accurate detection of pathogens in human infectious diseases.

The Philosophy of He(和):Examined from the Perspectives of Technology and Culture

Pre-modern Chinese crafts,such as iron smelting,cookery,medicine,and the production of vehicles,bows,and arrows indicate the traditional Chinese view of technology as being organic,holistic,and comprehensive.This view of technology is guided by the concept of he(和)and employs the means and methods of he,thus achieving the purport of he.In Chinese,the character he(和)possesses positive connotations.It originated from the meaning of"to season;to add flavoring to"(调和)and that of flavors being"perfectly harmonious"(和美).From this sensory experience,he gradually extended to the abstract levels of materiality,humanity,sociality,"order"(wei位),and "power,situation,force"(shi势).Finally,he was elevated to the supreme level of"qi of great harmony"(taihe zhi qi太和之气),which is comparable to the concept of dao(道).The philosophy of he has exerted wide impact on such areas as technology,art,national character,cultural psychology,and behavior patterns,and has become an integral part of China's inherent culture.The paradoxes and deviations of he hold their own profound philosophical implications that merit further exploration.As humanity confronts significant challenges,such as how we can coexist with others,with technology,and with nature,the ancient Eastern wisdom embodied in he continues to possess practical characteristics and value.

Enhancing emerging technology discovery in nanomedicine by integrating innovative sentences using BERT and NLDA

Purpose:Nanomedicine has significant potential to revolutionize biomedicine and healthcare through innovations in diagnostics,therapeutics,and regenerative medicine.This study aims to develop a novel framework that integrates advanced natural language processing,noise-free topic modeling,and multidimensional bibliometrics to systematically identify emerging nanomedicine technology topics from scientific literature.Design/methodology/approach:The framework involves collecting full-text articles from PubMed Central and nanomedicine-related metrics from the Web of Science for the period 2013-2023.A fine-tuned BERT model is employed to extract key informative sentences.Noiseless Latent Dirichlet Allocation(NLDA)is applied to model interpretable topics from the cleaned corpus.Additionally,we develop and apply metrics for novelty,innovation,growth,impact,and intensity to quantify the emergence of novel technological topics.Findings:By applying this methodology to nanomedical publications,we identify an increasing emphasis on research aligned with global health priorities,particularly inflammation and biomaterial interactions in disease research.This methodology provides deeper insights through full-text analysis and leading to a more robust discovery of emerging technologies.Research limitations:One limitation of this study is its reliance on the existing scientific literature,which may introduce publication biases and language constraints.Additionally,manual annotation of the dataset,while thorough,is subject to subjectivity and can be time-consuming.Future research could address these limitations by incorporating more diverse data sources,and automating the annotation process.Practical implications:The methodology presented can be adapted to explore emerging technologies in other scientific domains.It allows for tailored assessment criteria based on specific contexts and objectives,enabling more precise analysis and decision-making in various fields.Originality/value:This study offers a comprehensive framework for identifying emerging technologies in nanomedicine,combining theoretical insights and practical applications.Its potential for adaptation across scientific disciplines enhances its value for future research and decision-making in technology discovery.

Science and Technology Commissioners Supporting High-Quality Development Project for Hundreds of Counties, Thousands of Towns, and Myriads of Villages in the Context of Rural Revitalization

This paper discusses the important role of science and technology commissioners in the high-quality development of hundreds of counties,thousands of towns,and myriads of villages in the context of rural revitalization,including building bridges,accelerating the transformation of achievements,promoting the value-added of the whole agricultural industry chain,and promoting the rapid development of rural industrial economy.It also discusses the working achievements of science and technology commissioners,in order to promote further development of rural revitalization in Guangdong Province.

Application and prospects of proteomic technology in inflammation:a review

Proteomics is a new technology that has been widely applied in the field of life and health science.It effectively addresses issues related to the impact of dietary structure on organs,tissues,and cells,as well as the changes in proteins in various organs,tissues,and cells under disease conditions.The differential proteins identified through proteomics can serve as disease biomarkers and target proteins affecting health and can be used for disease diagnosis and health regulation.In this paper,the application of proteomics in the field of infl ammation in recent years was summarized,especially in the therapeutic target and mechanism of action,which opens up a new way for more effective prevention,diagnosis,and treatment of inflammation,and provides medical protection for human life and health.

The Impact of Health Information Technology on Hospital Performance: A Systematic Integrative Literature Review

Objective: To review, categorise, and synthesise findings from literature on health information technology (HIT) functionalities, HIT use, and the impact of HIT on hospital performance. Materials and Methods: We conducted a systematic integrative literature review based on a compre-hensive database search. To organise, categorise and synthesise the ex-isting literature, we adopted the affordance actualization theory. To align the literature with our research framework, we used four categories: 1) the functionalities of HIT and how these functionalities are measured;2) use and immediate outcomes of HIT functionalities;3) different perfor-mance indicators and how HIT functionalities affect them;and 4) what hospital characteristics influence the outcome of hospital performance. Results: Fifty-two studies were included. We identified four types of HIT. Only ten studies (19.2%) define the use of HIT by explicitly meas-uring the use rate of HIT. We identified five dimensions of hospital per-formance indicators. Every dimension showed mixed results;however, in general, HIT has a positive impact on mortality and patient readmis-sions. We found several hospital characteristics that may affect the rela-tionship between HIT and hospital-level outcomes. Discussion: Further efforts should focus on embedded research on HIT functionalities, use and effects of HIT implementations with more performance indicators and adjusted for hospital characteristics. Conclusion: The proposed framework could help hospitals and researchers make decisions regard-ing the functionalities, use and effects of HIT implementation in hospi-tals. Given our research outcomes, we suggest future research opportuni-ties to improve understanding of how HIT affects hospital performance. .

The Value of Modern Information Technology in Nursing Emergencies

In first aid, traditional information interchange has numerous shortcomings. For example, delayed information and disorganized departmental communication cause patients to miss out on critical rescue time. Information technology is becoming more and more mature, and as a result, its use across numerous industries is now standard. China is still in the early stages of developing its integration of emergency medical services with modern information technology;despite our progress, there are still numerous obstacles and constraints to overcome. Our goal is to integrate information technology into every aspect of emergency patient care, offering robust assistance for both patient rescue and the efforts of medical personnel. Information may be communicated in a fast, multiple, and effective manner by utilizing modern information technology. This study aims to examine the current state of this field’s development, current issues, and the field’s future course of development.

A quantitative study of disruptive technology policy texts:An example of China’s artificial intelligence policy

Purpose:The transformative impact of disruptive technologies on the restructuring of the times has attracted widespread global attention.This study aims to analyze the characteristics and shortcomings of China’s artificial intelligence(AI)disruptive technology policy,and to put forward suggestions for optimizing China’s AI disruptive technology policy.Design/methodology/approach:Develop a three-dimensional analytical framework for“policy tools-policy actors-policy themes”and apply policy tools,social network analysis,and LDA topic model to conduct a comprehensive analysis of the utilization of policy tools,cooperative relationships among policy actors,and the trends in policy theme settings within China’s innovative AI technology policy.Findings:We find that the collaborative relationship among the policy actors of AI disruptive technology in China is insufficiently close.Marginal subjects exhibit low participation in the cooperation network and overly rely on central subjects,forming a“center-periphery”network structure.Policy tool usage is predominantly focused on supply and environmental types,with a severe inadequacy in demand-side policy tool utilization.Policy themes are diverse,encompassing topics such as“Intelligent Services”“Talent Cultivation”“Information Security”and“Technological Innovation”,which will remain focal points.Under the themes of“Intelligent Services”and“Intelligent Governance”,policy tool usage is relatively balanced,with close collaboration among policy entities.However,the theme of“AI Theoretical System”lacks a comprehensive understanding of tool usage and necessitates enhanced cooperation with other policy entities.Research limitations:The data sources and experimental scope are subject to certain limitations,potentially introducing biases and imperfections into the research results,necessitating further validation and refinement.Practical implications:The study introduces a three-dimensional analysis framework for disruptive technology policy texts,which is significant for formulating and enhancing disruptive technology policies.Originality/value:This study utilizes text mining and content analysis techniques to quantitatively analyze disruptive technology policy texts.It systematically evaluates China’s AI policies quantitatively,focusing on policy tools,policy actors,policy themes.The study uncovers the characteristics and deficiencies of current AI policies,offering recommendations for formulating and enhancing disruptive technology policies.