Unlocking high-rate O3 layered oxide cathode for Na-ion batteries via ion migration path modulation

O3-NaNi1/3Fe1/3Mn1/3O2is a promising layered cathode material with high specific capacity,low cost,and simple synthesis.However,sluggish kinetic hindrance is attributed to the size discrepancy between the large Na-ion and narrow tetrahedral interstitial positions,leading to inferior rate capacity and low reversible capacity.Herein,F with light-weight and strong electronegativity is introduced to substitute O atoms in the bulk structure,which intensifies the bond strength of transition metal and oxygen and enlarges the Na+diffusion channel.In addition,density-functional theory(DFT) calculations demonstrate that the electrostatic interaction is weakened between Na+in the tetrahedral site and the transitionmetal cation directly below it,dramatically reducing the migration barriers of Na+diffusion.Consequently,the as-obtained NaNi1/3Fe1/3Mn1/3O1.95F0.05sample displays outstanding rate performance of 86.7 mA h g^(-1)at 10 C and excellent capacity retention of 84.1% after 100 cycles at 2 C.Moreover,a full cell configuration using a hard carbon anode reaches the energy density of 307.7 Wh kg^(-1).This strategy paves the way for novel means of modulating the Na-ion migration path for high-rate O3-type layered cathode materials.

Cultivation Path of Nursing Undergraduates’Scientific Research and Innovation Ability

Objective: The cultivation of the innovation ability and scientific research is one of the nursing learning objectives for undergraduate students. To explore the method and effect of training system of scientific research innovation ability of nursing undergraduates based on “3332”. Methods: Three course learning modules are constructed: stage-based course learning module, systematic project practice training module and comprehensive practice training module. A practical training platform for scientific research innovation projects is built, and undergraduate scientific research innovation ability training is carried out from both in-class and out-of-class lines. Results: Since 2017, the students have obtained 7 national innovation and entrepreneurship training programs, 52 university-level undergraduate scientific research projects, published more than 10 academic papers, and obtained 2 patent authorization. Conclusions: The training system of scientific research innovation ability of nursing undergraduates based on “3332” is conducive to the development of scientific research innovation ability of nursing students, and to cultivate nursing talents who can adapt to the development of the new era and have better post competence.

Research on the Strategic Path of Veterinary Medicine Serving Rural Revitalization in Agriculture-Related Universities

Local agriculture-related universities must have certain regional advantages,advantages of agricultural characteristics,human resources,and science and technology in the process of implementing the rural revitalization strategy.Using literature research and investigation methods,combined with the experience of colleges and universities,the veterinary discipline of rural science and technology correspondent and technology yard,this study discusses our veterinary discipline in education teaching practice and talent training mode innovation,improving the quality of talent training and study on the strategic path of united front service for rural revitalization.

An efficient parallel algorithm for shortest pathsin planar layered digraphs

This paper presents an efficient parallel algorithm for the shortest path problem in planar layered digraphs that runs in O(log^3n) time with n processors. The algorithms uses a divide and conquer approach and is based on the novel idea of a one-way separator, which has the property that any directed path can be crossed only once.

Research on Fractal-Scanning Path for Arbitrary Boundary Layer in Layered Manufacturing

The fractal curve is proposed as a novel scanning path used in Layered Manufacturing. Aiming at a limitation that the fractal curve can only fill a square region, a method is developed to realize the trimming of fractal curve in arbitrary boundary layer by means of judging intersection points between parameterized arbitrary boundary and a FASS (space filling, self avoiding, simple and self similar) fractal curve. Accordingly, the related algorithm concerning with determining intersection points has been investigated according to the recursion feature of the fractal curve, and in the process of the fractal curve traversed, the rule of judging intersection points is ascertained as well, so that the laser scanning beam can “walk” along the fractal curve inside the desired boundary, and arbitrary contour components are fabricated.

An Efficient CSI Feedback Scheme for Dual-Polarized MIMO Systems Using Layered Multi-Paths Information

Massive MIMO is one of the enabling technologies for beyond 4G and 5G systems due to its ability to provide beamforming gain and reduce interference Dual-polarized antenna is widely adopted to accommodate a large number of antenna elements in limited space. However,current CSI(channel state information)feedback schemes developed in LTE for conventional MIMO systems are not efficient enough for massive MIMO systems since the overhead increases almost linearly with the number of antenna. Moreover,the codebook for massive MIMO will be huge and difficult to design with the LTE methodology. This paper proposes a novel CSI feedback scheme named layered Multi-paths Information based CSI Feedback(LMPIF),which can achieve higher spectrum efficiency for dual-polarized antenna system with low feedback overhead. The MIMO channel is decomposed into long term components(multipath directions and amplitudes)and short term components(multipath phases). The relationship between the two components and the optimal precoder is derived in closed form. To reduce the overhead,different granularities in feedback time have been applied for the long term components and short term componentsLink and system level simulation results prove that LMPIF can improve performance considerably with low CSI feedback overhead.

Cultivation Path of Nursing Undergraduates’ Scientific Research and Innovation Ability

Objective:The cultivation of the innovation ability and scientific research is one of the nursing learning objectives for undergraduate students.To explore the method and effect of training system of scientific research innovation ability of nursing undergraduates based on“3332”.Methods:Three course learning modules are constructed:stage-based course learning module,systematic project practice training module and comprehensive practice training module.A practical training platform for scientific research innovation projects is built,and undergraduate scientific research innovation ability training is carried out from both in-class and out-of-class lines.Results:Since 2017,the students have obtained 7 national innovation and entrepreneurship training programs,52 university-level undergraduate scientific research projects,published more than 10 academic papers,and obtained 2 patent authorization.Conclusions:The training system of scientific research innovation ability of nursing undergraduates based on“3332”is conducive to the development of scientific research innovation ability of nursing students,and to cultivate nursing talents who can adapt to the development of the new era and have better post competence.

Analysing the structure of the optical path length of a supersonic mixing layer by using wavelet methods

The nano-particle-based planar laser scattering （NPLS） technique is used to measure the density distribution in the supersonic mixing layer of the convective Mach number 0.12, and the optical path difference （OPL）, which is quite crucial for the study of aero-optics, is obtained by post processing. Based on the high spatiotemporal resolutions of the NPLS, the structure of the OPL is ana]ysed using wavelet methods. The coherent structures of the OPL are extracted using three methods, including the methods of thresholding the coefficients of the orthogonal wavelet transform and the wavelet packet transform, and preserving a number of wavelet packet coefficients with the largest amplitudes determined by the entropy dimension. Their performances are compared, and the method using the wavelet packet is the best. Based on the viewpoint of multifractals, we study the OPL by the wavelet transform maxima method （WTMM）, and the result indicates that its scaling behaviour is evident.

Research Progress of Chinese Herbal Medicine Additives in Layer Breeding

Chinese herbal medicine have dual effects of medicinal value and nutrition regulation. In recent years, antibiotics have been widely forbidden in live- stock production, which are inevitably replaced by natural Chinese herbal medicine in livestock breeding. A brief summary of current research progress of Chinese herbal medicine in layer breeding is given in the paper.

Teaching Reform Path of Architecture Specialty under the Collaborative Education of “Production, Teaching and Research” and Its Application Effect

To break through the development bottleneck of architecture specialty,it should think about how to realize the high-quality cultivation of talents through the adjustment of teaching system.Reform path of architecture under the collaborative education of "production,teaching and research" and its application effect are systemically studied.By analyzing the relationship among production,teaching and scientific research,the essence of integration and mutual assistance among the three is analyzed.A series of teaching reforms are carried out on the reform principles of teaching content,setting principles of practice curriculum and implementation paths of practice curriculum in the theoretical and practical courses of architecture specialty.The purpose is to make the achievements of scientific research and production contribute to the development of teaching,so that the three sections of "production,teaching and research" form a benign interaction,mutual assistance and common promotion.This teaching system under the collaborative education of "production,teaching and research" is of positive significance to the cultivation of architectural talents’ innovative ability,practical ability and comprehensive ability.

An Innovative Soft Design Science Methodology for Improving Development of a Secure Information System in Tanzania Using Multi-Layered Approach

This paper presents an innovative Soft Design Science Methodology for improving information systems security using multi-layered security approach. The study applied Soft Design Science Methodology to address the problematic situation on how information systems security can be improved. In addition, Soft Design Science Methodology was compounded with mixed research methodology. This holistic approach helped for research methodology triangulation. The study assessed security requirements and developed a framework for improving information systems security. The study carried out maturity level assessment to determine security status quo in the education sector in Tanzania. The study identified security requirements gap (IT security controls, IT security measures) using ISO/IEC 21827: Systems Security Engineering-Capability Maturity Model (SSE-CMM) with a rating scale of 0 - 5. The results of this study show that maturity level across security domain is 0.44 out of 5. The finding shows that the implementation of IT security controls and security measures for ensuring security goals are lacking or conducted in ad-hoc. Thus, for improving the security of information systems, organisations should implement security controls and security measures in each security domain (multi-layer security). This research provides a framework for enhancing information systems security during capturing, processing, storage and transmission of information. This research has several practical contributions. Firstly, it contributes to the body of knowledge of information systems security by providing a set of security requirements for ensuring information systems security. Secondly, it contributes empirical evidence on how information systems security can be improved. Thirdly, it contributes on the applicability of Soft Design Science Methodology on addressing the problematic situation in information systems security. The research findings can be used by decision makers and lawmakers to improve existing cyber security laws, and enact laws for data privacy and sharing of open data.

我国黄土高原地区地震动衰减关系研究的若干进展

地震动的衰减关系是指地震动随震级、距离和场地条件等变化的经验关系,近年来在我国亦被称为地震动预测方程,是估计地震动及其影响场的主要方法之一,在地震区划和重大工程场地地震安全性评价中被广泛应用。黄土是一种特殊土,在我国广泛分布。我国黄土高原地区地质构造复杂,新构造活动强烈,中强地震频发,地震动的衰减关系有其特殊性,总结我国黄土高原地区地震动衰减关系的研究成果对促进黄土高原地区抗震研究有重要意义。在简要介绍国内外地震动衰减关系研究的基础上,全面系统地总结我国学者在黄土高原地区的地震烈度衰减关系,基岩和土层场地地震动峰值加速度、峰值速度、峰值位移以及反应谱衰减关系方面的研究成果;评述和讨论在黄土覆盖地区地震动衰减研究领域存在的问题和今后的研究方向。文章的研究工作对从事黄土高原地区地震工程研究的科技人员有重要参考价值。

数字赋能文化创意产业的机理、现实及实现路径

数字技术具有较强的赋能作用,对文化创意产业的转型升级作用越来越明显。数字技术全面赋能文化创意产业生产、流通、消费领域。文化创意产业数字化进程加速,但发展依然存在不平衡的问题。未来,要依托“数字中国”战略,推动文化创意产业数字化转型;发展相关核心技术,提升文化创意产业的技术水平;加强内容创新,优化数字文化创意产品供给;加强数字文化治理,推进文化创意产业健康发展。

产学研合作视角下我国企业关键核心技术突破路径研究——以三峡集团为例

党的二十大报告指出要加强企业主导的产学研融合,强化企业的科技创新主体地位,发挥科技型骨干企业引领支撑作用。从产学研合作创新的视角出发,选择三峡集团作为研究案例,以文本分析与专利分析为手段,探究了三峡集团实现关键核心技术突破的路径。研究发现:该企业关键核心技术的突破遵循“引进、消化、吸收、再创新-集成创新-整合创新”的演化过程。从专利合作网络的视角来看,在集成创新阶段,较高的非冗余性可以帮助企业在合作中占据优势地位,从而提高自身的创新能力;在整合创新阶段,伙伴之间更频繁的合作可以帮助企业接触更多异质性的创新资源,推动关键核心技术的突破。本文对三峡集团核心技术突破路径的研究,对我国解决“卡脖子”问题,实现关键核心技术的创新和突破具有一定的参考意义。

关键核心技术攻关驱动因素及实现路径——以集成电路产业为例的组态分析

关键核心技术作为国之重器占据重要战略位置,但关键核心技术的关键驱动要素机制与可实现路径尚未明晰。为揭示关键核心技术攻关有效的驱动因素及组态路径模式,在厘清关键核心技术的概念特征基础上,基于技术-组织-环境理论框架,以集成电路产业为例,利用定性比较分析与必要条件分析法对我国28个省份的关键核心技术攻关的必要条件及可实现路径展开研究。结果发现:(1)数字化技术、R&D投入强度、市场化环境和政府支持度是决定关键核心技术攻关的关键因素;(2)存在3条关键核心技术攻关的有效路径,分别是高数字技术下市场导向型、高组织集聚下产业导向型和高研发资助下政府导向型,且均以技术层为基础、组织及环境层为支持;(3)产业协同能弥补关键核心技术攻关的创新要素匮乏的不足,同时政府资助的影响力不容忽视。因此,进一步推动集成电路产业关键核心技术攻关,要以丰富新一代信息技术资本存量与增加科技研发资本流量为两大着力点,在积极为关键核心技术攻关提供政府资金支持的同时引导社会资源投入,为关键核心技术打造良好的外部发展环境。

基于科研胜任力的超声影像技能分层培训的实践研究

实验动物专用超声成像系统能为多学科多领域的科研课题提供超声影像测试。基于科研胜任力的超声影像技能的培训有别于临床医学实习生和住培生,不同层级的学生对超声影像技能的需求有较大的区别。文章总结了基于科研胜任力的超声影像技能分层培训课程的特点以及实施方案,按照学生的教育发展路径,将培训对象分为本科生、硕士研究生、博士研究生三个层次,对各级学生采取“一对一,按需培训”培训模式,培训内容分为基础理论知识培训和上机操作培训,针对学生所需的科研胜任力进行精准培养,有目的地提高学生超声影像技能的科研能力水平。为本科生和研究生的科研能力培养方案提供依据,以更好地提高其科研胜任力。

糖尿病患者应用中医适宜技术预后不良的危险因素分析与路径

目的分析糖尿病患者应用中医适宜技术预后不良的危险因素与路径研究。方法纳入120例应用中医适宜技术干预的糖尿病患者为研究对象,并将其按预后情况分成预后良好组80例、预后不良组40例,统计分析糖尿病患者的临床基本资料。比较2组健康调查简表(SF-36)、血糖相关指标(空腹血糖、餐后2 h血糖及糖化血红蛋白)水平,应用单因素分析及多因素Logistic回归分析糖尿病患者预后不良情况的主要危险因素。结果良好组SF-36各项评分均高于不良组患者(P<0.05)。良好组空腹血糖、餐后2 h血糖及糖化血红蛋白水平均低于不良组(P<0.05)。单因素分析显示,糖尿病患者预后不良情况发生与性别、高血压、吸烟、文化程度无关,比较差异无统计学意义(P>0.05);主要与年龄、体质量指数(BMI)、血脂异常、病程、糖尿病家族史、治疗依从性、科学运动、丙氨酸氨基转移酶(ALT)水平有关,比较差异有统计学意义(P<0.05)。Logistic回归分析结果发现,年龄≥70岁、BMI肥胖或超重、病程长短、血脂异常、糖尿病家族史、未科学运动、治疗依从性差、ALT升高为糖尿病患者发生预后不良情况的主要危险因素(P<0.05)。以糖尿病患者预后是否发生预后不良为因变量,发现病程、BMI、年龄、血脂异常、科学运动、治疗依从性、ALT、糖尿病家族史对糖尿病患者发生预后不良情况具有间接的中介作用。结论通过使用中医适宜技术对糖尿病患者进行干预,可有效改善患者的血糖指标及生活质量,糖尿病患者预后不良情况主要与年龄、病程、BMI指数、糖尿病家族史、血脂异常、ALT相关,为临床改善患者预后情况提供了参考。

自动泊车前轮转角闭环的分层控制方案

为提高自动泊车系统中控制器的抗扰动能力,优化控制律执行效果,提出了前轮转角闭环的分层控制方案.设计了以行驶距离为非时间参考量的fal函数非光滑控制律,输出前轮转角控制量.以阿克曼转向模型为基础,建立了前轮转角观测器,并使用模糊滑模控制器实现前轮转角闭环的横向控制.搭建Carsim/Simulink联合仿真系统,在典型泊车场景下验证所设计控制器的有效性、跟踪效果及鲁棒性.使用实车测试平台开展了试验.结果表明:所设计的前轮转角闭环分层控制方案能够快速准确地跟踪目标路径,提高了泊车系统的横向控制精度,并在未知转向非线性扰动下也具有良好的跟踪控制效果.

湖北“一村多名大学生计划”服务乡村振兴路径研究

高职教育服务乡村振兴意义重大,文章紧跟国家乡村振兴战略与国家高职教育改革前沿动态,探索湖北“一村多名大学生计划”更好服务乡村振兴战略有效路径,助力湖北地方经济发展以及巩固脱贫攻坚成果。

依托一流工程学科建设高校科技智库的难点、路径和策略

科技智库是支撑国家科技决策的重要力量,近年来科技智库的建设在全球范围内得到越来越多的重视和加强,其中依托高校成立的科技智库占据重要地位。全球高校科技智库越来越聚焦专业技术领域政策研究,理工类学科在科技智库建设和发展中发挥的作用愈加凸显。高水平研究型大学是国家科技创新体系中的重要力量,依托高校建设科技智库既是国家加强高端智库建设的需要,也应成为高校服务国家战略的自觉追求。本研究基于国外高校科技智库发展趋势,针对我国目前依托高校一流工程学科建设科技智库的难点,深入阐述破解发展难题的路径和策略。