摘要：The low cycle fatigue behavior of zirconium−titanium−steel composite plate under symmetrical and asymmetric stress control was *** effects of mean stress and stress amplitude on cyclic deformation,ratcheting effect and damage mechanism were discussed in *** results show that under symmetric stress control,the forward ratcheting deformation is *** asymmetric stress control,the ratcheting strain increases rapidly with mean stress and stress amplitude *** high stress amplitude,the influence of mean stress is more *** addition,by studying the variation of strain energy density,it is found that the stress amplitude mainly promotes the fatigue damage,while the mean stress leads to the ratcheting *** addition,fractographic observation shows that the crack initiates in the brittle metal compound at the interface,and the steel has higher resistance to crack ***,the accuracy of life prediction model considering ratcheting effect is discussed in detail,and a high-precision life prediction model directly based on mean stress and stress amplitude is proposed.

摘要：As an extension of environmental justice,landscape justice emphasizes achieving inclusive and equitable planning and design in both built and natural environments,allowing different social groups to enjoy and share landscape resources and benefits more *** endowing landscape design with a“just”orientation,landscape justice significantly improves the spatial and environmental benefits while promotes the process of environmental *** justice is characterized by its interdisciplinary nature,showing great variability in spatio-temporal scales,site dimensions and attributes,and social groups and scenarios,the research of which urgently requires in-depth dialogues,sincere collaborations,and active explorations among multiple *** call for enriching the connotation of landscape justice through interdisciplinary perspectives and addressing practical issues,to provide innovative spatial propositions and paths for creating sustainable urban environments and landscapes.

摘要：Objective Clinical medical record data associated with hepatitis B-related acute-on-chronic liver failure(HBV-ACLF)generally have small sample sizes and a class ***,most machine learning models are designed based on balanced data and lack *** study aimed to propose a traditional Chinese medicine(TCM)diagnostic model for HBV-ACLF based on the TCM syndrome differentiation and treatment theory,which is clinically interpretable and highly *** We collected medical records from 261 patients diagnosed with HBV-ACLF,including three syndromes:Yang jaundice(214 cases),Yang-Yin jaundice(41 cases),and Yin jaundice(6 cases).To avoid overfitting of the machine learning model,we excluded the cases of Yin *** data standardization and cleaning,we obtained 255 relevant medical records of Yang jaundice and Yang-Yin *** address the class imbalance issue,we employed the oversampling method and five machine learning methods,including logistic regression(LR),support vector machine(SVM),decision tree(DT),random forest(RF),and extreme gradient boosting(XGBoost)to construct the syndrome diagnosis *** study used precision,F1 score,the area under the receiver operating characteristic(ROC)curve(AUC),and accuracy as model evaluation *** model with the best classification performance was selected to extract the diagnostic rule,and its clinical significance was thoroughly ***,we proposed a novel multiple-round stable rule extraction(MRSRE)method to obtain a stable rule set of features that can exhibit the model’s clinical *** The precision of the five machine learning models built using oversampled balanced data exceeded *** these models,the accuracy of RF classification of syndrome types was 0.92,and the mean F1 scores of the two categories of Yang jaundice and Yang-Yin jaundice were 0.93 and 0.94,***,the AUC was *** extraction rules of the RF syn

摘要：在柔索驱动机器人中采用柔性索代替传统的刚性连杆,可以显著降低机构的重量及运动部件的惯性,突破铰链转角及连杆伸缩长度的制约,因而在工作空间、负载自重比以及适应性方面展现出明显的优势.这不仅体现了机器人设计中的轻量化理念,也符合人机共融的发展趋势.鉴于此,深入探讨柔索驱动机器人在运动规划、轨迹跟踪、索力分配、振动抑制和容错控制5个方向的代表性理论、典型应用和研究进展,分析不同运动规划与控制方法的设计思路和优点,并进一步总结各领域面临的挑战.最后针对自主重构、变刚度以及人机协同控制问题,展望柔索驱动机器人运动规划与控制方法的发展趋势.

摘要：ChatGPT的诞生标志着人类信息传播技术出现了重大突破。它凭借预训练和大模型获得了强大的“泛化能力”,可以基于上下文内容推断出最合适的答案。然而,作为基于概率推断的生成式人工智能,ChatGPT也存在着一定的缺陷。从内部推断逻辑来看,基于人类文本知识进行预训练的模型,会复刻人类社会的偏见与缺陷,在传播过程中会进一步强化偏向,忽视边缘群体。受制于外部环境的介入,ChatGPT也会受到资本力量和政治立场的影响。对于生成式人工智能的发展,要从训练数据和模型设计阶段防止偏向的发生,同时也要发挥行业力量、制度优势和用户技术素养,共同引导其健康发展。

摘要：中国电影理论批评是随着电影这种新型文艺样式传入中国以后,国人对它的了解和认识逐步深入,以及伴随着国产民族电影的诞生与发展历程,一方面持续引入和学习借鉴域外各种电影理论批评的资源,另一方面则从中华文化和中华美学的宝库中不断汲取营养而逐步形成自己的传统。在20世纪中国电影创作和电影产业的发展历程中,中国电影理论批评也经历了自身传统的形成、变革与发展的历程。如今,当我们要努力建构有中国特色的电影理论批评之学科体系、学术体系和话语体系时。

摘要：以亚磷酸二正丁酯和十二醇为原料,通过酯交换法合成亚磷酸双十二烷基酯。采用FTIR对其结构进行表征;以亚磷酸双十二烷基酯为极压抗磨剂,制备一种以多元醇酯为主油性剂的水基钢丝拉拔润滑剂,采用四球机和扫描电镜考察其摩擦性能。结果表明,合成的亚磷酸双十二烷基酯具有良好的极压抗磨性能,质量分数3.0%左右的亚磷酸双十二烷基酯,可使水基复合润滑液的最大无卡咬负荷提高75%,磨斑直径减小33.4%,摩擦因数降低31.6%,且磨痕表面相对光滑、磨痕分布均匀。

摘要：1项目缘起阿那亚北岸园区位于其北戴河黄金海岸园区以北约1km的蒲河桥南,毗邻大蒲河渤海湾入海口,是一片以游艇文创为主题的滨海度假区。北岸市集(图1)就位于该区南部公共组团的北侧,与北岸礼堂、友谊湾的卷宗公寓和友谊之家俱乐部酒店一起构成了园区南广场。市集东临城市道路绿化带,西、北侧都是多层公寓,东北角则是通向北岸园区滨水区的商业带(图2)。

摘要：联合减排被广泛应用于低碳供应链实践中,其包含制造商的减排和零售商的广告营销活动。本文以一个制造商和一个零售商组成的双渠道低碳供应链为研究对象,假设不确定的动态市场需求受产品减排量和零售商低碳广告宣传的动态影响,扩展了需求模型;主要研究结果表明:(1)联合减排策略在双渠道供应链中起到了积极的作用,使得其成员和整体的利润不断攀升;(2)战略联盟为最佳策略,实现了低碳供应链的Pareto最优;同时,在一定条件下,合作广告与减排成本分担契约比合作广告契约更加有效,当消费者对直销渠道以及低碳产品的偏好越强烈,供应链成员采用合作契约的可能性就越大;(3)批发价格以及消费者的渠道忠诚度对于零售商的最优策略有着显著影响研究结果可为供应链成员在低碳环境下的联合排放策略提供理论依据。

摘要：惯性传感器中的检验质量是精密引力测量系统中的核心,其表面会因为宇宙高能粒子持续注入而积累电荷,在惯性传感器内部电磁场作用下产生杂散噪声,影响精密引力测量结果.根据光电效应原理,用UV LED产生极紫外光照射惯性传感器的电极与检验质量表面,并在电极间施加适当电场,就可以在不引入外力作用且无接触条件下改变检验质量的电荷量.本文基于平行板电容器的简化电极模型,对极紫外电荷驱动过程进行了理论建模仿真.在此基础上设计和构建了一套电荷驱动验证试验系统,针对光功率、偏置电压对充放电速率的影响和交流电荷驱动进行试验.试验证明电荷充放电速率与极紫外光功率成正比,其量子产率随极板间电场强度变化.最终可实现稳定控制检验质量电荷放电速率在0.31~0.76 pC⋅s^(–1),检验质量电荷充电速率在–0.05~–0.17 pC⋅s^(–1).分析提出的检验质量电荷充放电速率理论模型与地面试验结果一致,可以有力支撑电荷管理控制系统的研制.