Dual-Path Vision Transformer用于急性缺血性脑卒中辅助诊断

急性缺血性脑卒中是由于脑组织血液供应障碍导致的脑功能障碍,数字减影脑血管造影(DSA)是诊断脑血管疾病的金标准。基于患者的正面和侧面DSA图像,对急性缺血性脑卒中的治疗效果进行分级评估,构建基于Vision Transformer的双路径图像分类智能模型DPVF。为了提高辅助诊断速度,基于EdgeViT的轻量化设计思想进行了模型的构建;为了使模型保持轻量化的同时具有较高的精度,提出空间-通道自注意力模块,促进Transformer模型捕获更全面的特征信息,提高模型的表达能力;此外,对于DPVF的两分支的特征融合,构建交叉注意力模块对两分支输出进行交叉融合,促使模型提取更丰富的特征,从而提高模型表现。实验结果显示DPVF在测试集上的准确率达98.5%,满足实际需求。

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 Lifting Path of Data Literacy Ability of Applied University Teachers under the Perspective of Organizational Learning

With the arrival of the big data era, the modern higher education model has undergone radical changes, and higher requirements have been put forward for the data literacy of college teachers. The paper first analyzes the connotation of teacher data literacy, and then combs through the status quo and dilemmas of teachers’ data literacy ability in applied universities. The paper proposes to enhance the data literacy ability of teachers from the perspective of organizational learning. Through building a digital culture, building a data-driven teaching environment, and constructing an interdisciplinary learning community to further promote the application of the theory and practice of datafication inside and outside the organization, and ultimately improve the quality of teaching.

Path Planning for Robotic Arms Based on an Improved RRT Algorithm

The burgeoning robotics industry has catalyzed significant strides in the development and deployment of industrial and service robotic arms, positioning path planning as a pivotal facet for augmenting their operational safety and efficiency. Existing path planning algorithms, while capable of delineating feasible trajectories, often fall short of achieving optimality, particularly concerning path length, search duration, and success likelihood. This study introduces an enhanced Rapidly-Exploring Random Tree (RRT) algorithm, meticulously designed to rectify the issues of node redundancy and the compromised path quality endemic to conventional RRT approaches. Through the integration of an adaptive pruning mechanism and a dynamic elliptical search strategy within the Informed RRT* framework, our algorithm efficiently refines the search tree by discarding branches that surpass the cost of the optimal path, thereby refining the search space and significantly boosting efficiency. Extensive comparative analysis across both two-dimensional and three-dimensional simulation settings underscores the algorithm’s proficiency in markedly improving path precision and search velocity, signifying a breakthrough in the domain of robotic arm path planning.

Application of Clinical Care Pathway in Perioperative Patients with Autologous Arteriovenous Fistula Balloon Expansion

[Objective] To explore the effect of clinical care pathways in perioperative patients with autologous arteriovenous fistula balloon expansion. [Method] 202 patients undergoing autologous arteriovenous fistula from July 2021 to June 2022 were randomly divided into a control group (101 cases) and an observation group (101 cases) to compare the incidence rates of postoperative complications, hospitalization days, hospitalization expenses, knowledge of self-management of arteriovenous fistula and nursing satisfaction. [Results] In the observation group, the incidence of arteriovenous fistula was higher than that of the control group, and the hospitalization days and hospitalization costs were lower than that of the control group. The difference between the two groups was statistically significant (P < 0.05). [Conclusion] The application of the clinical nursing path to intervene in patients with autologous arteriovenous fistula balloon dilation can reduce the incidence of postoperative complications, shorten the hospital length of time, reduce hospitalization costs and improve patient satisfaction, which is clinical promotion significance.

Feynman Path Integral Using Operator Integration in Banach Space

Feynman-Path Integral in Banach Space: In 1940, R.P. Feynman attempted to find a mathematical representation to express quantum dynamics of the general form for a double-slit experiment. His intuition on several slits with several walls in terms of Lagrangian instead of Hamiltonian resulted in a magnificent work. It was known as Feynman Path Integrals in quantum physics, and a large part of the scientific community still considers them a heuristic tool that lacks a sound mathematical definition. This paper aims to refute this prejudice, by providing an extensive and self-contained description of the mathematical theory of Feynman Path Integration, from the earlier attempts to the latest developments, as well as its applications to quantum mechanics. About a hundred years after the beginning of modern physics, it was realized that light could in fact show behavioral characteristics of both waves and particles. In 1927, Davisson and Germer demonstrated that electrons show the same dual behavior, which was later extended to atoms and molecules. We shall follow the method of integration with some modifications to construct a generalized Lebesgue-Bochner-Stieltjes (LBS) integral of the form , where u is a bilinear operator acting in the product of Banach spaces, f is a Bochner summable function, and μ is a vector-valued measure. We will demonstrate that the Feynman Path Integral is consistent and can be justified mathematically with LBS integration approach.

基于chirplet path tracing-VMD的变转速信号故障特征提取

针对变分模态分解方法在提取故障特征时处理非平稳信号能力不足的情况,提出基于线调频小波路径追踪(chirplet path tracing)的自适应改进变分模态分解(variational mode decomposition,VMD)方法。该方法首先利用线调频小波路径追踪算法由非平稳信号得到估计转速变化曲线;其次对目标信号进行等角度重采样,通过转速变化曲线将信号从时域转化为角域;再次采用奇异值分解确定角域信号的降噪阶次,当该阶次自适应变分模态分解的分量个数后,对重采样信号进行变分模态分解处理;最后对分解后的各信号分量进行Hilbert包络谱分析,从而提取故障特征。通过对齿轮箱轴承故障进行仿真和实验验证,表明该方法能有效提取变转速信号的故障特征。

社会支持理论视域下中国式现代化体育发展的现实之困与纾解之策

中国式现代化体育是为满足全体人民体育需要,从传统体育向现代体育发展转向的具有中国特色的社会主义体育现代化。现代化已成为我国体育事业发展新诉求、新目标、新征程,加快推进中国式现代化体育发展是促进中国式现代化的必然选择。运用文献资料法与逻辑分析法,基于社会支持系统四要素“主体—客体—内容—手段”为逻辑主线,分析中国式现代化体育发展的现实困境。研究认为:主体供给乏力制约中国式现代化体育支持网络的形成,客体动力不足制约中国式现代化体育的普遍参与,支持内容贫乏阻滞中国式现代化体育的全面发展,支持手段有限阻碍中国式现代化体育的社会联结。实现多元主体支持,为中国式现代化体育供给提供有效保障;提升客体参与动力,为中国式现代化体育参与提供内生动力;丰富内容体系构建,为中国式现代化体育发展创造良好条件;改善社会支持手段,为中国式现代化体育发展提供关键支撑等纾解策略。

新质生产力与中国式现代化——基于产业革命视角的分析

当前全球正在经历新的一次产业革命,即新一轮科技革命和产业变革。产业革命下,生产中物的范围、人和物的结合方式、人和人的结合方式等深刻改变,使得生产力内涵和本质发生深远变化,形成新质生产力。新质生产力的发展具有特定运行规律,其对生产社会化、资本流通过程、生产流程、技术进步、产业业态等方面的改变,给我国经济高质量发展提供了新的机遇,同时也提出了新的挑战。在中国式现代化的实现过程中,我们应深刻理解和把握新质生产力理论在习近平经济思想中的理论定位,处理好实体经济和金融的关系,筑牢中国式现代化的实体经济根基,把握生产关系与生产力的辩证运动,在社会主义制度下保障新质生产力发展。

我国淡水渔业转型升级路径与工程科技创新重点研究

淡水渔业转型升级对推动消费升级、实现产业高质量可持续发展具有重要意义。本文在剖析我国淡水渔业转型升级面临的突出问题和工程科技需求的基础上,提出淡水渔业转型升级的总体思路、推进路径、主要任务和主要目标,并通过系统研究提出淡水渔业绿色高效养殖模式、优良养殖品种繁育技术与装备、精准投喂与饲料高效利用技术、不同养殖模式下水环境调控技术、尾水高效绿色处理技术与装备、多元信息智能立体感知技术与装备、淡水产品捕捞及冷链化优质保鲜贮运技术和养殖产品初加工技术与装备等工程科技创新研究重点,旨在为全面提升我国淡水渔业的设施化、机械化、智能化、智慧化和标准化水平提供决策参考。

Analysis of the Digital Transformation Development Path for Travel Enterprises

The travel industry is witnessing rapid changes due to the advent of digital technologies. Traditional travel enterprises face challenges from online travel agencies, sharing economy platforms, and new customer expectations. As a result, adapting to the digital age has become a necessity for their survival. This paper discusses the development path and related countermeasures of the digital transformation of tourism enterprises. In the literature review, the concept and significance of digitalization, industrial transformation and tourism digital transformation are analyzed. In the description of the evaluation index selection, the evaluation index of the digital development level of the tourism enterprises is determined, and the evaluation method of the entropy value method and the grey relative correlation degree analysis are introduced. Through data calculation and result analysis, the digital level and contribution of China’s tourism industry is evaluated. In the restriction analysis, the paper focuses on the constraints of online tourism, sustainable development, infrastructure, development potential and information technology level. Finally, the key measures to strengthen customer demand insight, strengthen the construction of information technology infrastructure, promote the application and innovation of new technologies, and strengthen the development of social responsibility projects are put forward in the path selection and countermeasures. This study has important guidance for promoting the digital transformation and sustainable development of tourism.

产教融合共同体建设:形态演进、现实审视与路径优化

打造产教融合共同体是深化现代职业教育体系建设改革、推动产业结构调整升级、促进经济社会发展的重要途径。通过分析产教融合组织形态演进历程发现,产教融合共同体形态从初级阶段的项目合作式向着未来阶段的生态圈型共同体演进。针对产教融合共同体建设中的现实问题,需要在加强产教融合共同体建设的政策供给和财政支持、鼓励和引导产教融合共同体的组织变革、建立高效的信息交流平台和沟通协调机制、推进实体化运行和市场化运作等方面积极行动,促进产教融合共同体的健康发展,实现建设职教强国的战略目标。

宜居宜业和美乡村建设水平评价与分类施策——以重庆市璧山区七塘镇为例

“建设宜居宜业和美乡村”是党的二十大对全面推进乡村振兴作出的战略部署.在阐释宜居宜业和美乡村科学内涵的基础上构建评价指标体系,以璧山区七塘镇为例开展实证研究,探讨建设宜居宜业和美乡村的实施路径.结果表明:(1)七塘镇宜居宜业和美乡村建设水平呈现“北高南低”的空间分布格局,总体建设位于中等水平,不同维度水平有差距.(2)分维度看,七塘镇生活维度水平最高,治理、人文和环境维度水平其次,产业维度水平最低.(3)分村域看,将军村、喜观村建设水平较高,四合村、阳岫村建设水平中等,盐店村、跃进村、建设村和三步梯村建设水平较低.(4)依据优势与短板,将七塘镇8个村划分为综合发展型、主导发展型、极化发展型和欠缺发展型4类,针对性地提出各类乡村建设宜居宜业和美乡村的实施路径,以期为推进宜居宜业和美乡村建设提供理论与实践指导.

中国式现代化背景下文化和旅游融合发展的五重逻辑与重要议题

文化和旅游现代化是中国式现代化的组成部分,推进文化和旅游融合发展是现阶段建设文化强国和旅游强国的重要任务。要解决当前文化和旅游融合发展中存在的价值导向不突出、推进方式碎片化、市场体系不健全、治理水平不高、学理支撑不强等问题,须将文化和旅游及其融合发展置于中国式现代化的整体格局和历史进程中加以理解、审视和推进。文章在扼要梳理中国式现代化以及文化和旅游融合研究进展的基础上,论述了中国式现代化背景下推进文化和旅游融合发展的价值逻辑、历史逻辑、系统逻辑、实践逻辑和理论逻辑,并结合中国式现代化的总体要求与推进文化和旅游深度融合发展的现实需要,提出当前和未来一段时期亟须重点关注的8个重要议题。

中国式现代化背景下的乡村旅游:功能、短板与优化路径

全面建设社会主义现代化国家,最艰巨最繁重的任务仍然在农村.作为乡村振兴的重要抓手和可行路径,乡村旅游在促进农业农村全面进步和农民全面发展等方面具有重要作用.文章基于中国式现代化的时代背景和发展要求,系统分析乡村旅游的潜在功能、发展短板和优化路径.研究认为:乡村旅游应在推动乡村高质量发展、保障农民主体地位、丰富人民精神世界、增进乡村民生福祉和推动乡村绿色发展等方面发挥重要作用.然而,当前乡村旅游发展实践中仍然存在同质化问题严重、农民主体地位不突出、文化保护利用不充分、利益共享机制有待优化、生态环境保护面临挑战等短板问题.因此,未来亟需从推动产业融合创新、培育多元市场主体、弘扬特色乡土文化、保障村民合法权益、改善乡村生态环境等方面加以优化.

大国竞争背景下新质生产力形成的理论逻辑与实现路径

新质生产力是习近平总书记基于大国竞争背景下我国发展阶段、发展环境、发展条件变化,作出的具有根本性、全局性、长远性的重大战略判断。在新一代信息技术加速突破应用、先进制造技术加速产业转型的新发展阶段,形成新质生产力既是构建新发展格局、推动高质量发展的必然要求,也是我国建设现代化经济体系的关键动能,关系我国在未来发展和国际竞争中赢得战略主动。新质生产力的内涵是以引领国际经济体系变革、重塑现代化产业体系、提升企业核心竞争力为目的,从传统生产力向新质生产力的演化升级应该包含国际竞争、国家优势和企业发展三个层面整个生产范式的转变。文章以马克思主义政治经济学、习近平经济思想、习近平生态文明思想为理论支撑,提出“新质生产力”的理论构建包括三个维度:一是微观载体——打造世界一流企业;二是中观治理——提升国际竞争优势;三是宏观发展——构建人类命运共同体。文章将新质生产力形成的理论逻辑和实践路径融入中国当前的发展战略中,从转变企业发展范式、重塑现代化产业体系和建设新的全球治理体系三个方面提出形成新质生产力的改革路径,三条路径相辅相成、协同发力,共同为新质生产力的形成注入活力,使得生产力发展更好地服务于中国高质量发展的战略定位。

黄芩苷对多杀性巴氏杆菌感染猪巨噬细胞后炎症因子表达及信号通路影响的研究

为研究不同浓度黄芩苷对多杀性巴氏杆菌(Pm)HN-13株感染的猪巨噬细胞(HD11)内炎症因子表达的影响及与炎症信号通路的相互作用关系,本研究采用western blot检测HN-13株感染(0、30 min、60 min、90 min)HD11细胞中促分裂原活化蛋白激酶(MAPK)信号通路3个关键蛋白(p-ERK/ERK、p-p38/p38、p-JNK/JNK)的表达水平;采用ELISA和荧光定量RT-PCR(RT-qPCR)分析检测低浓度剂量黄芩苷(L组,20μmol/L)、中浓度剂量黄芩苷(M组,40μmol/L)和高浓度剂量黄芩苷(H组,60μmol/L)对Pm感染的猪巨噬细胞内肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)和IL-1β分泌水平及其m RNA转录水平的影响,同时设置对照组(Control)和模型组(HN-13);利用抑制剂SCH772984阻断ERK通路,采用ELISA和RT-qPCR检测黄岑苷对Pm感染的HD11细胞内炎症因子TNF-α、IL-6和IL-1β表达及m RNA转录水平的影响,同时设置对照组(Control)、模型组(HN-13)、抑制组(HN-13+抑制剂)。结果显示:与HN-13株处理0 min组相比,随着感染时间的延长,HN-13株感染HD11细胞中p-ERK/ERK的蛋白表达量逐渐升高(P<0.01),而p-p38/p38和p-JNK/JNK蛋白表达量均未发生显著变化(P>0.05),表明,HN-13株可使HD11细胞炎症相关ERK通路蛋白表达增强,且与作用时间呈正相关。与模型组(HN-13)相比,3个浓度剂量的黄芩苷均显著抑制TNF-α、IL-6和IL-1β的分泌水平及m RNA转录水平(P<0.05),且抑制作用随着黄芩苷浓度升高而增强。与抑制组相比,黄芩苷与抑制剂共处理组可以显著抑制HN-13感染的HD11细胞中TNF-α、IL-1β和IL-6的分泌及m RNA转录水平(P<0.05)。综上所述,黄芩苷可以抑制Pm感染的HD11细胞中ERK通路相关蛋白的表达和分泌,进而发挥抗炎作用。本研究为研制防治Pm引起的猪肺疫的新药提供了思路。

不同应力路径下层理煤体力学特性试验研究

为探究不同应力路径下层理煤体力学特性和破坏特征,利用MTS816岩石力学试验系统对0°、30°、45°、60°和90°层理倾角煤样开展了常规三轴加载、增轴压卸围压和恒轴压卸围压应力路径下的力学试验,分析了应力路径和层理倾角对煤样强度、变形及破坏特征的影响规律。研究结果表明:(1)常规三轴加载条件下煤样在达到峰值强度前,应力-应变曲线呈近线性关系,达到峰值强度后,应力-应变曲线迅速跌落;增轴压卸围压条件下,随着卸荷比的增加,轴向应变增量比呈线性增加趋势,而环向应变增量比和体积应变增量比呈低速增长-急剧增长-平稳增长的三阶段变化特征;恒轴压卸围压条件下,轴向应变增量比、环向应变增量比和体积应变增量比均呈低速增长-急剧增长的两阶段变化特征。(2)随着层理倾角的增加,不同应力路径下煤样峰值强度和轴向峰值应变均呈先减小后增大的V型变化趋势,在0°时达到最大值,在60°时达到最小值。(3)随着卸荷比的增大,煤样变形模量先平缓后迅速劣化,泊松比先缓慢增加后呈指数形式增加,临界卸荷比随层理倾角的增大先增加后减小;当层理倾角相同时,增轴压卸围压条件下的临界卸荷比低于恒轴压卸围压。(4)常规三轴加载条件下煤样发生脆性剪切破坏,增轴压卸围压和恒轴压卸围压条件下煤样呈张拉-剪切混合破坏模式,当层理倾角为60°时,煤样主剪切破裂面角度与层理倾角几乎一致。

中国式现代化背景下的中国乡镇实践与发展路径探析

党的二十大报告指出,我国已经成功推进和拓展了中国式现代化。乡镇作为中国城镇体系中最基本的地域综合体,其发展逐渐以满足人民生活为立足点,在中国现代化进程中展开了深刻的实践。中国式现代化的发展目标给全面推进中国乡镇发展提出了新要求和新挑战,全力推进乡镇的中国式现代化发展,必须认清中国乡镇在新时代发展中的地位,深入分析中国乡镇在整个现代化进程中的发展特征和现实基础,以探寻乡镇实现现代化发展的新路径。基于此,文章提出乡镇现代化是推进中国式现代化的基础组成,乡镇是建设新型城镇化的重要载体,是促进城乡融合的重要支撑,是实现乡村振兴的战略引擎。进一步,文章从乡镇的历史发展和现实条件出发,论述了乡镇在经济活动发展区、人口流动集聚区、历史文化传承区和宜居生活典范区建设上具有坚实的基础。在经济发展上,近代以来乡镇经济活动功能已初具雏形,乡镇企业的兴起促进了乡镇工业的发展,继而推动乡镇承担更多的经济活动;在人口流动上,城—镇—乡之间的人口流动更加频繁,随着乡村振兴和镇的发展,乡镇对流动人口的吸引力不断增强,乡镇的人口集聚作用更加突出;在历史文化上,名镇、名村承载着不同历史时期的文化价值,从中国历史文化名镇到中国特色景观旅游名镇,体现出乡镇对历史文化的传承和特色景观的营造;在宜居生活上,建设美丽宜居乡镇是建设美丽中国的重要组成部分,乡镇在产业体系培育、基础设施建设、公共服务配套、生态环境治理上都取得了一定的成效。针对中国乡镇发展的现实基础,文章提出推动中国乡镇现代化发展的路径和举措。在坚持城镇化和农业农村现代化的基础上,要从“四高理念”出发做实中国乡镇现代化发展的基础,以扩大对外开放,实现高水平开放;以促进经济要素活力,助力高质量发展;以提升公共服务质量,打造高品质生活;以创新社会治理模式,探索高效能治理,以期为全面提升中国乡镇现代化发展质量、制定精准的乡镇发展政策提供决策参考。

改进A^(*)算法的安全高效室内全局路径规划

针对A^(*)算法生成路径存在斜穿障碍物、转折点多及不平滑的情况,本文提出一种改进的A^(*)算法。首先通过排除所有强迫邻居节点来优化搜索邻域,避免生成斜穿障碍物的路径,提升路径的安全性和可靠性;其次设置安全距离,提取优化邻域后生成路径的必经转折点,减少路径冗余,简化路径结构;最后使用贝塞尔曲线对必经转折点进行插值,根据相邻两必经转折点的位置和连线斜率确定每段贝塞尔曲线控制点的数量和位置,进行分段平滑。仿真实验表明,改进的A^(*)算法较原A^(*)算法生成的路径安全性平均提升了33.68%,转折点个数平均减少了37.00%,同时机器人转向角和路径曲率连续,保证了路径的平滑。改进的A^(*)算法最终生成的路径与障碍物均保持在安全距离内,转折点少且平滑,可应用到移动机器人室内路径规划中。