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一种改进Oriented RepPoints的遥感图像有向目标检测
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作者 谢国波 张家源 +1 位作者 林志毅 廖文康 《小型微型计算机系统》 CSCD 北大核心 2024年第11期2725-2731,共7页
为解决Oriented RepPoints算法在遥感图像有向目标检测中因遥感图像背景干扰信息较多和目标尺度大小不一所导致的检测精度不高、易漏检误检等问题,提出一种改进Oriented RepPoints的遥感图像有向目标检测方法MA-RPDet(Mixed Attention R... 为解决Oriented RepPoints算法在遥感图像有向目标检测中因遥感图像背景干扰信息较多和目标尺度大小不一所导致的检测精度不高、易漏检误检等问题,提出一种改进Oriented RepPoints的遥感图像有向目标检测方法MA-RPDet(Mixed Attention RepPoints Detector).首先,采用了PVTv2作为主干网络,该网络利用线性空间缩减自注意力机制提取出更具局部连续性的特征图,并保持与卷积运算类似的线性复杂度.其次,在特征融合阶段设计了串联性混合注意力模块,进一步强化了重要特征,促进了多尺度特征的高效交互.最后,引入平滑GIoU损失函数对模型学习策略进行优化,提高了检测精度.在两个遥感图像目标检测数据集DOTA和HRSC2016上的实验结果表明,所提方法的检测精度mAP分别达到了77.19%和90.3%,均高于其他对比算法,证明了本文方法的有效性. 展开更多
关键词 遥感图像 有向目标检测 oriented RepPoints 注意力机制 损失函数
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基于改进Oriented R-CNN的旋转框麦穗检测与计数模型
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作者 于俊伟 陈威威 +2 位作者 郭园森 母亚双 樊超 《农业工程学报》 EI CAS CSCD 北大核心 2024年第6期248-257,共10页
为对干扰、遮挡等复杂的田野环境中麦穗进行精准定位与计数,该研究提出了一种改进的Oriented R-CNN麦穗旋转框检测与计数方法,首先在主干网络中引入跨阶段局部空间金字塔(spatial pyramid pooling cross stage partial networks,SPPCSPC... 为对干扰、遮挡等复杂的田野环境中麦穗进行精准定位与计数,该研究提出了一种改进的Oriented R-CNN麦穗旋转框检测与计数方法,首先在主干网络中引入跨阶段局部空间金字塔(spatial pyramid pooling cross stage partial networks,SPPCSPC)模块扩大模型感受野,增强网络感知能力;其次,在颈网络中结合路径聚合网络(PANet,path aggregation network)和混合注意力机制(E2CBAM,efficient two convolutional block attention module),丰富特征图包含的特征信息;最后采用柔性非极大值抑制算法(Soft-NMS,soft-non maximum suppression)优化预测框筛选过程。试验结果显示,改进的模型对复杂环境中的麦穗检测效果良好。相较原模型,平均精确度均值mAP提高了2.02个百分点,与主流的旋转目标检测模型Gliding vertex、R3det、Rotated Faster R-CNN、S2anet和Rotated Retinanet相比,mAP分别提高了4.99、2.49、3.94、2.25和4.12个百分点。该研究方法利用旋转框准确定位麦穗位置,使得框内背景区域面积大幅度减少,为实际观察麦穗生长状况和统计数量提供了一种有效的方法。 展开更多
关键词 图像识别 作物 注意力机制 麦穗 oriented R-CNN
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一种改进的YOLOv7-OBB舰船识别方法
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作者 孙宏磊 陈雯柏 刘辉翔 《兵器装备工程学报》 CAS CSCD 北大核心 2024年第8期192-198,共7页
为解决高分辨率遥感图像中舰船识别准确率低的问题,提出了一种改进的YOLOv7-OBB舰船识别方法。引入定向检测框OBB(oriented bounding box)和KLD损失,可有效解决舰船密集排列和比例细长且方向任意所产生的漏检问题,在提高定位精度的同时... 为解决高分辨率遥感图像中舰船识别准确率低的问题,提出了一种改进的YOLOv7-OBB舰船识别方法。引入定向检测框OBB(oriented bounding box)和KLD损失,可有效解决舰船密集排列和比例细长且方向任意所产生的漏检问题,在提高定位精度的同时保留了船只的目标方向信息;在YOLOv7基础框架的主干网络加入混合注意力模块ACmix,加强网络对于小目标检测的敏感度,能够提升对小型船只的检测精度;在颈部加入全局注意力机制(NAMAttention)和Partial卷积(PConv),在保证模型轻量化的同时,可提高PAN网络在复杂背景中捕捉关键特征的能力。实验结果表明,与YOLOv7模型相比,该方法在DOTAships数据集上取得了88.5%的平均精度,93.0%的准确率,84.7%的召回率,分别比YOLOv7提高了5%,0.9%和3.9%。与当前主流算法相比,该方法在检测效果上有着明显提升。 展开更多
关键词 YOLOv7-obb算法 舰船识别 定向检测框 混合注意力模块 全局注意力机制 Partial卷积
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Three-dimensionally oriented organization of hexagonal MIL-96 microplates toward superior film microstructure
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作者 Sixing Chen Xinmiao Jin +3 位作者 Yuyang Wu Taotao Ji Fei Wang Yi Liu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第8期69-73,共5页
Preferential orientation control of metal—organic framework(MOF)films is advantageous for maximizing pore uniformity and minimizing grain-boundary defects.Nonetheless,the preparation of MOF films with both in-plane a... Preferential orientation control of metal—organic framework(MOF)films is advantageous for maximizing pore uniformity and minimizing grain-boundary defects.Nonetheless,the preparation of MOF films with both in-plane and out-of-plane orientations remains a grand challenge.In this study,we reported the preparation of three-dimensionally oriented MIL-96 layers through combining morphology control of MIL-96 seeds with addition of polyvinylpyrrolidone surfactants and arachidonic acids.The three-dimensionally oriented MIL-96 film was readily obtained through in-plane epitaxial growth.It is anticipated that the aforementioned protocol can be effective for obtaining diverse MOF films with a three-dimensionally oriented organization. 展开更多
关键词 Metaleorganic framework FILM Orientation Epitaxial growth Morphological control
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Oriented Bounding Box Object Detection Model Based on Improved YOLOv8
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作者 ZHAO Xin-kang SI Zhan-jun 《印刷与数字媒体技术研究》 CAS 北大核心 2024年第4期67-75,114,共10页
In the study of oriented bounding boxes(OBB)object detection in high-resolution remote sensing images,the problem of missed and wrong detection of small targets occurs because the targets are too small and have differ... In the study of oriented bounding boxes(OBB)object detection in high-resolution remote sensing images,the problem of missed and wrong detection of small targets occurs because the targets are too small and have different orientations.Existing OBB object detection for remote sensing images,although making good progress,mainly focuses on directional modeling,while less consideration is given to the size of the object as well as the problem of missed detection.In this study,a method based on improved YOLOv8 was proposed for detecting oriented objects in remote sensing images,which can improve the detection precision of oriented objects in remote sensing images.Firstly,the ResCBAMG module was innovatively designed,which could better extract channel and spatial correlation information.Secondly,the innovative top-down feature fusion layer network structure was proposed in conjunction with the Efficient Channel Attention(ECA)attention module,which helped to capture inter-local cross-channel interaction information appropriately.Finally,we introduced an innovative ResCBAMG module between the different C2f modules and detection heads of the bottom-up feature fusion layer.This innovative structure helped the model to better focus on the target area.The precision and robustness of oriented target detection were also improved.Experimental results on the DOTA-v1.5 dataset showed that the detection Precision,mAP@0.5,and mAP@0.5:0.95 metrics of the improved model are better compared to the original model.This improvement is effective in detecting small targets and complex scenes. 展开更多
关键词 Remote sensing image oriented bounding boxes object detection Small target detection YOLOv8
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Estimation of cancer cell migration in biomimetic random/oriented collagen fiber microenvironments
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作者 姚静如 李国强 +8 位作者 姚喜耀 周连杰 叶志凯 刘艳平 郑栋天 唐婷 宋克纳 陈果 刘雳宇 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第5期749-756,共8页
Increasing data indicate that cancer cell migration is regulated by extracellular matrixes and their surrounding biochemical microenvironment,playing a crucial role in pathological processes such as tumor invasion and... Increasing data indicate that cancer cell migration is regulated by extracellular matrixes and their surrounding biochemical microenvironment,playing a crucial role in pathological processes such as tumor invasion and metastasis.However,conventional two-dimensional cell culture and animal models have limitations in studying the influence of tumor microenvironment on cancer cell migration.Fortunately,the further development of microfluidic technology has provided solutions for the study of such questions.We utilize microfluidic chip to build a random collagen fiber microenvironment(RFM)model and an oriented collagen fiber microenvironment(OFM)model that resemble early stage and late stage breast cancer microenvironments,respectively.By combining cell culture,biochemical concentration gradient construction,and microscopic imaging techniques,we investigate the impact of different collagen fiber biochemical microenvironments on the migration of breast cancer MDA-MB-231-RFP cells.The results show that MDA-MB-231-RFP cells migrate further in the OFM model compared to the RFM model,with significant differences observed.Furthermore,we establish concentration gradients of the anticancer drug paclitaxel in both the RFM and OFM models and find that paclitaxel significantly inhibits the migration of MDA-MB-231-RFP cells in the RFM model,with stronger inhibition on the high concentration side compared to the low concentration side.However,the inhibitory effect of paclitaxel on the migration of MDA-MB-231-RFP cells in the OFM model is weak.These findings suggest that the oriented collagen fiber microenvironment resembling the late-stage tumor microenvironment is more favorable for cancer cell migration and that the effectiveness of anticancer drugs is diminished.The RFM and OFM models constructed in this study not only provide a platform for studying the mechanism of cancer development,but also serve as a tool for the initial measurement of drug screening. 展开更多
关键词 microfluidic chip random collagen fiber microenvironment(RFM) oriented collagen fiber microenvironment(OFM) cancer cell migration
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Analysis of the Effect of Problem-Oriented Nursing Intervention on Patients with Lower Extremity Arteriosclerosis Obliterans in Vascular Surgery
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作者 Yang An 《Journal of Clinical and Nursing Research》 2024年第4期1-6,共6页
Objective: To analyze the effect of problem-oriented nursing intervention on patients with lower extremity arteriosclerosis obliterans (ASO) in vascular surgery. Methods: The clinical data of 128 patients with lower e... Objective: To analyze the effect of problem-oriented nursing intervention on patients with lower extremity arteriosclerosis obliterans (ASO) in vascular surgery. Methods: The clinical data of 128 patients with lower extremity ASO in vascular surgery were selected and randomly divided into groups A and B, with 64 cases each. Group A is the control group, and Group B is the observation group. Group A received the routine nursing intervention, and Group B received the problem-oriented nursing intervention. The compliance, self-care ability, psychological state, quality of life, and nursing satisfaction of the two groups of patients were evaluated based on various indicators. Results: After the intervention, the evaluation of self-care ability (ESCA) score of the patients in Group B was higher than that of Group A, and the symptom checklist-90 (SCL-90) score was lower than that of Group A. The differences were significant (t = 10.019, t = 3.118, P < 0.01). After the intervention, the World Health Organization Quality of Life Brief (WHOQOL-BREF) index scores of the two groups increased and the increase in Group B was significantly higher than Group A (P < 0.001). The compliance rate of Group B (62/ 96.88%) was higher than that of Group A (52/ 81.25%), and the difference was extremely significant (χ2 = 8.020, P < 0.01). Conclusion: Problem-oriented nursing intervention for patients with lower extremity ASO in vascular surgery improved the patient’s self-care ability, and quality of life, reduced the patient’s negative emotions, and enhanced their overall satisfaction. 展开更多
关键词 Problem orientation Nursing intervention Vascular surgery Lower extremity arteriosclerosis obliterans
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Intervention Effect of Lower Limb Rehabilitation Robot with Task-Oriented Training on Stroke Patients and Its Influence on KFAROM Score
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作者 Maiding He Li Huang +9 位作者 Dekun Tang Mei Qin Ping Zhan Xichan Wang Xia Gao Jianzhu Wang Na Yin Hui Xu Yonghua Yang Kaihua Tang 《Journal of Biosciences and Medicines》 2024年第9期62-72,共11页
Objective: To explore the effect of lower limb rehabilitation robot combined with task-oriented training on stroke patients and its influence on KFAROM score. Methods: 100 stroke patients with hemiplegia admitted to o... Objective: To explore the effect of lower limb rehabilitation robot combined with task-oriented training on stroke patients and its influence on KFAROM score. Methods: 100 stroke patients with hemiplegia admitted to our hospital from January 2023 to December 2023 were randomly divided into two groups, the control group (50 cases) was given task-oriented training assisted by nurses, and the observation group (50 cases) was given lower limb rehabilitation robot with task-oriented training. Lower limb balance, lower limb muscle strength, motor function, ankle function, knee flexion range of motion and walking ability were observed. Results: After treatment, the scores of BBS, quadriceps femoris and hamstrings in the observation group were significantly higher than those in the control group (P Conclusion: In the clinical treatment of stroke patients, the combination of task-oriented training and lower limb rehabilitation robot can effectively improve the lower limb muscle strength, facilitate the recovery of balance function, and have a significant effect on the recovery of motor function, which can improve the walking ability of stroke patients and the range of motion of knee flexion, and achieve more ideal therapeutic effectiveness. 展开更多
关键词 Lower Limb Rehabilitation Robot Task-oriented Training STROKE KFAROM
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An Approach to Detect Structural Development Defects in Object-Oriented Programs
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作者 Maxime Seraphin Gnagne Mouhamadou Dosso +1 位作者 Mamadou Diarra Souleymane Oumtanaga 《Open Journal of Applied Sciences》 2024年第2期494-510,共17页
Structural development defects essentially refer to code structure that violates object-oriented design principles. They make program maintenance challenging and deteriorate software quality over time. Various detecti... Structural development defects essentially refer to code structure that violates object-oriented design principles. They make program maintenance challenging and deteriorate software quality over time. Various detection approaches, ranging from traditional heuristic algorithms to machine learning methods, are used to identify these defects. Ensemble learning methods have strengthened the detection of these defects. However, existing approaches do not simultaneously exploit the capabilities of extracting relevant features from pre-trained models and the performance of neural networks for the classification task. Therefore, our goal has been to design a model that combines a pre-trained model to extract relevant features from code excerpts through transfer learning and a bagging method with a base estimator, a dense neural network, for defect classification. To achieve this, we composed multiple samples of the same size with replacements from the imbalanced dataset MLCQ1. For all the samples, we used the CodeT5-small variant to extract features and trained a bagging method with the neural network Roberta Classification Head to classify defects based on these features. We then compared this model to RandomForest, one of the ensemble methods that yields good results. Our experiments showed that the number of base estimators to use for bagging depends on the defect to be detected. Next, we observed that it was not necessary to use a data balancing technique with our model when the imbalance rate was 23%. Finally, for blob detection, RandomForest had a median MCC value of 0.36 compared to 0.12 for our method. However, our method was predominant in Long Method detection with a median MCC value of 0.53 compared to 0.42 for RandomForest. These results suggest that the performance of ensemble methods in detecting structural development defects is dependent on specific defects. 展开更多
关键词 Object-oriented Programming Structural Development Defect Detection Software Maintenance Pre-Trained Models Features Extraction BAGGING Neural Network
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Constructing an ion‐oriented channel on a zinc electrode through surface engineering 被引量:2
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作者 Xin Liu Kun Wang +6 位作者 Ying Liu Fuhua Zhao Jianjiang He Hao Wu Jianfei Wu Han‐Pu Liang Changshui Huang 《Carbon Energy》 SCIE EI CAS CSCD 2023年第11期2-14,共13页
The inherent shortcomings of a zinc anode in aqueous zinc‐ion batteries(ZIBs)such as zinc dendrites and side reactions severely limit their practical application.Herein,to address these issues,an ion‐oriented transp... The inherent shortcomings of a zinc anode in aqueous zinc‐ion batteries(ZIBs)such as zinc dendrites and side reactions severely limit their practical application.Herein,to address these issues,an ion‐oriented transport channel constructed by graphdiyne(GDY)nanowalls is designed and grown in situ on the surface of a zinc electrode.The vertically stacked GDY nanowalls with a unique hierarchical porous structure and mechanical properties form a nanomesh‐like interface on the zinc electrode,acting as an ion‐oriented channel,which can efficiently confine the segmented growth of zinc metal in microscopic regions of hundreds of nanometers.In those microscopic regions,the uniform domain current density is effortlessly maintained compared with a large surface area,thereby inhibiting zinc dendrites effectively.Besides,due to the presence of the ion‐oriented channel,the modified zinc anode demonstrates long‐term stable zinc plating/stripping performance for more than 600 h at 1 mAh cm^(−2)in an aqueous electrolyte.In addition,full‐cells coupled with MnO2 show high specific capacity and power density,as well as excellent cycling stability with a capacity retention of 82%after 5000 cycles at 1 A g^(−1).This work provides a feasible and accessible surface engineering approach to modify the electrode interface for confined and dendrite‐free zinc deposition in aqueous ZIBs. 展开更多
关键词 DENDRITE graphdiyne ion‐oriented channel nanomesh interface zinc‐ion batteries
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Construction of Oriented Structure in Inner Surface of Small-Diameter Artificial Blood Vessels:A Review 被引量:1
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作者 伊光辉 成馨雨 +3 位作者 耿梦想 孟凯 张克勤 赵荟菁 《Journal of Donghua University(English Edition)》 CAS 2023年第2期149-163,共15页
There is an urgent need for small-diameter artificial blood vessels in clinic.Physical,chemical and biological factors should be integrated to avoid thrombosis and intimal hyperplasia after implantation and to promote... There is an urgent need for small-diameter artificial blood vessels in clinic.Physical,chemical and biological factors should be integrated to avoid thrombosis and intimal hyperplasia after implantation and to promote successful fabrication of small-diameter artificial blood vessels.From a physical perspective,the internal oriented structures of natural blood vessels plays an important role in guiding the directional growth of cells,improving the blood flow environment,and promoting the regeneration of vascular tissue.In this review,the effects of the oriented structures on cells,including endothelial cells(ECs),smooth muscle cells(SMCs)and stem cells,as well as the effect of the oriented structures on hemodynamics and vascular tissue remodeling and regeneration are introduced.Various forms of oriented structures(fibers,grooves,channels,etc.)and their construction methods are also reviewed.Conclusions and future perspectives are given.It is expected to give some references to relevant researches. 展开更多
关键词 small-diameter artificial blood vessel internal oriented structure direct cell behavior vascular tissue remodeling and regeneration
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Exploring heteroepitaxial growth and electrical properties of α-Ga_(2)O_(3) films on differently oriented sapphire substrates
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作者 Wei Wang Shudong Hu +7 位作者 Zilong Wang Kaisen Liu Jinfu Zhang Simiao Wu Yuxia Yang Ning Xia Wenrui Zhang Jichun Ye 《Journal of Semiconductors》 EI CAS CSCD 2023年第6期46-51,共6页
This study explores the epitaxial relationship and electrical properties of α-Ga_(2)O_(3) thin films deposited on a-plane, mplane, and r-plane sapphire substrates. We characterize the thin films by X-ray diffraction ... This study explores the epitaxial relationship and electrical properties of α-Ga_(2)O_(3) thin films deposited on a-plane, mplane, and r-plane sapphire substrates. We characterize the thin films by X-ray diffraction and Raman spectroscopy, and elucidate thin film epitaxial relationships with the underlying sapphire substrates. The oxygen vacancy concentration of α-Ga_(2)O_(3) thin films on m-plane and r-plane sapphire substrates are higher than α-Ga_(2)O_(3) thin film on a-plane sapphire substrates. All three thin films have a high transmission of over 80% in the visible and near-ultraviolet regions, and their optical bandgaps stay around 5.02–5.16 eV. Hall measurements show that the α-Ga_(2)O_(3) thin film grown on r-plane sapphire has the highest conductivity of 2.71 S/cm, which is at least 90 times higher than the film on a-plane sapphire. A similar orientation-dependence is seen in their activation energy as revealed by temperature-dependent conductivity measurements, with 0.266, 0.079, and 0.075eV for the film on a-, m-, r-plane, respectively. The origin of the distinct transport behavior of films on differently oriented substrates is suggested to relate with the distinct evolution of oxygen vacancies at differently oriented substrates. This study provides insights for the substrate selection when growing α-Ga_(2)O_(3) films with tunable transport properties. 展开更多
关键词 gallium oxide thin film epitaxy ORIENTATION oxygen vacancy electrical properties
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Complexity of Injective Homomorphisms to Small Tournaments, and of Injective Oriented Colourings
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作者 Russell J. Campbell Nancy E. Clarke Gary MacGillivray 《Open Journal of Discrete Mathematics》 2023年第1期1-15,共15页
Several possible definitions of local injectivity for a homomorphism of an oriented graph G to an oriented graph H are considered. In each case, we determine the complexity of deciding whether there exists such a homo... Several possible definitions of local injectivity for a homomorphism of an oriented graph G to an oriented graph H are considered. In each case, we determine the complexity of deciding whether there exists such a homomorphism when G is given and H is a fixed tournament on three or fewer vertices. Each possible definition leads to a locally-injective oriented colouring problem. A dichotomy theorem is proved in each case. 展开更多
关键词 Injective Graph Homomorphism oriented Colouring COMPLEXITY
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“一点两线三面”创新实验平台的构建与实践 被引量:1
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作者 龚良玉 王杰 +6 位作者 杜丰玉 徐鲁斌 马传利 颜世海 宋祖伟 刘福恒 王修中 《大学化学》 CAS 2024年第4期26-32,共7页
传统化学实验室功能单一、分布零散、共享性差,导致实验用房和实验设备利用效率低,这种建设模式不利于多学科知识的交叉融合,一定程度上影响学生综合素质的发展。本研究秉承“建优质平台,抓实践育人,树创新理念,育创新人才”的指导思想... 传统化学实验室功能单一、分布零散、共享性差,导致实验用房和实验设备利用效率低,这种建设模式不利于多学科知识的交叉融合,一定程度上影响学生综合素质的发展。本研究秉承“建优质平台,抓实践育人,树创新理念,育创新人才”的指导思想,在化学实验室资源整合共享、利用率提升、开放式管理以及创新应用型人才培养质量提升等方面积极进行教学改革,经过多年探索,搭建起“以提升学生创新实践能力为着力点”“教学科研两条主线”“教学科研三层面”的创新实验(训)平台,取得了一定成效,将为同类高校的创新实验(训)平台建设提供参考。 展开更多
关键词 创新型 应用型 一点两线三面 实验(训)平台
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问题导向与成果导向相融合的钢筋混凝土结构设计原理课程教案设计 被引量:1
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作者 刘月飞 樊学平 《高等建筑教育》 2024年第2期104-109,共6页
综合考虑钢筋混凝土结构设计原理课程章节内容较多的问题,进行合理的课程教案设计是目前较好地教授这门课的方法之一。首先,基于问题导向,总结各章节教学内容需要解决的关键问题;然后,基于成果导向,以问题导向中的各个关键问题为教学成... 综合考虑钢筋混凝土结构设计原理课程章节内容较多的问题,进行合理的课程教案设计是目前较好地教授这门课的方法之一。首先,基于问题导向,总结各章节教学内容需要解决的关键问题;然后,基于成果导向,以问题导向中的各个关键问题为教学成果,开展各个章节的教案设计;最后,将钢筋混凝土结构设计原理课程中的主要章节内容整理成易于教学的教案,从而提升教师的教学能力和提高学生接受知识的能力。问题导向与成果导向相融合的教案设计方法可为土木工程专业其他相关课程的教案设计提供参考。 展开更多
关键词 问题导向 成果导向 钢筋混凝土结构设计原理 教案设计
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中国研究型医院的内涵和建设策略 被引量:2
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作者 金春林 康琦 +2 位作者 朱碧帆 陈非非 李芬 《卫生经济研究》 北大核心 2024年第1期32-35,共4页
系统梳理研究型医院的概念和内涵,从资金投入、人才队伍建设以及科研成果转化等方面分析我国研究型医院建设存在问题,在总结研究型医院国际发展经验的基础上,提出优化策略:打造研究型医院建设标杆,拓展医工合作新模式;加大研究型医院科... 系统梳理研究型医院的概念和内涵,从资金投入、人才队伍建设以及科研成果转化等方面分析我国研究型医院建设存在问题,在总结研究型医院国际发展经验的基础上,提出优化策略:打造研究型医院建设标杆,拓展医工合作新模式;加大研究型医院科研投入,优化投入结构;落实分级诊疗,构建适用于研究型医院的评价机制;优化人员激励机制,加强临床科研队伍建设;加强平台建设,提高科研转化能力。 展开更多
关键词 研究型医院 科研转化 绩效评价
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智慧社区人本化转型的行动框架与策略--基于“人-技术-空间-平台”四维互嵌视角 被引量:2
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作者 王江 王健 《规划师》 北大核心 2024年第1期50-59,共10页
智慧社区作为构成智慧城市的基本单元及我国城市精细化治理的“最后一公里”,其建设和治理模式的人本化转型,对于践行人民城市重要理念、促进城镇空间人性化设计、推进治理体系与治理能力现代化具有重要意义。结合文献资料、政策法规和... 智慧社区作为构成智慧城市的基本单元及我国城市精细化治理的“最后一公里”,其建设和治理模式的人本化转型,对于践行人民城市重要理念、促进城镇空间人性化设计、推进治理体系与治理能力现代化具有重要意义。结合文献资料、政策法规和城镇发展状况,梳理智慧社区建设发展演进脉络,厘清影响智慧社区人本化转型的“人”“技术”“空间”“平台”等4种因素,从参与主体、技术支撑、空间载体、治理平台等4个维度构建智慧社区人本化转型的理论框架,以期为我国智慧社区高质量建设提供理论支撑。 展开更多
关键词 智慧社区 人本化 技术 空间 平台 转型
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论“新质生产力”的国家方略政策取向 被引量:39
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作者 金碚 《北京工业大学学报(社会科学版)》 北大核心 2024年第2期1-8,共8页
生产力是决定经济社会发展的基础性根本性因素,一切经济社会现象归根结底受生产力状况所决定与制约。“新质生产力”是对国家发展方略及政策取向的原则提示,是将国家发展的方略核心,定位于“聚焦生产力,发力新科技”的实践方向;“新质... 生产力是决定经济社会发展的基础性根本性因素,一切经济社会现象归根结底受生产力状况所决定与制约。“新质生产力”是对国家发展方略及政策取向的原则提示,是将国家发展的方略核心,定位于“聚焦生产力,发力新科技”的实践方向;“新质生产力”既要有科技创新的要素结构,也要有创新担当和允许试错的制度安排。一个国家的人才政策取向,能否适应更需创新激励与权责担当的就业结构和工作秩序,对经济发展形势具有关键性影响;一心谋发展,聚意高质量,是众望所归的人民意愿,也是国家选择发展模式的政策取向。人类社会随着科技创新,特别是数字化和AI技术的长足发展,重复类工作将被大量替代,新创类工作不断涌现,纠管类工作得以优化。未来由于生产力的质态变化,产业组织也将发生根本性的变革,从而对经济系统中组织资本和信任资本具有更高要求。 展开更多
关键词 新质生产力 国家方略 政策取向 科技创新
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企业资源配置战略与债券信用评级 被引量:1
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作者 张新民 丁璇 杨道广 《财经问题研究》 北大核心 2024年第2期64-75,共12页
企业战略作为企业全局性、长期性资源配置的重要规划,对企业经营活动具有重要影响,也必然会影响企业的融资行为。本文从企业战略视角出发,以2008—2020年中国A股上市公司为研究对象,运用固定效应模型探究了企业资源配置战略对债券信用... 企业战略作为企业全局性、长期性资源配置的重要规划,对企业经营活动具有重要影响,也必然会影响企业的融资行为。本文从企业战略视角出发,以2008—2020年中国A股上市公司为研究对象,运用固定效应模型探究了企业资源配置战略对债券信用评级的影响。研究发现:相对于经营主导型企业,投资主导型企业的债券信用评级更低,并且该结论在处理内生性问题和进行一系列稳健性检验后依然成立。异质性分析发现,企业资源配置战略对债券信用评级的影响在非国有企业和分析师跟踪人数多的企业中更明显。中介效应检验结果表明,企业资源配置战略通过作用于企业违约风险而影响债券信用评级。本文的研究结论对发债企业、信用评级机构和债券市场投资者具有重要启示意义。 展开更多
关键词 企业资源配置战略 债券信用评级 企业违约风险 投资主导型企业 经营主导型企业
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新型农村集体经济高质量发展:内涵特征、现实困境与应对策略 被引量:6
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作者 赵黎 《农村金融研究》 北大核心 2024年第2期14-27,共14页
发展新型农村集体经济,实现集体经济现代化转型,是促进乡村振兴和共同富裕的重要途径。论文在阐述与分析新型农村集体经济高质量发展的理论内涵与新型农村集体经济主要类型的基础上,回顾与总结新型农村集体经济的发展历程与改革成效,阐... 发展新型农村集体经济,实现集体经济现代化转型,是促进乡村振兴和共同富裕的重要途径。论文在阐述与分析新型农村集体经济高质量发展的理论内涵与新型农村集体经济主要类型的基础上,回顾与总结新型农村集体经济的发展历程与改革成效,阐明新型农村集体经济发展面临的主要问题,并有针对性地提出推动新型农村集体经济高质量发展的路径和举措。同时,论文结合目前学界关于经济发展质量内涵的界定,从现实困境与需求出发,提出从治理、经济和社会三个维度理解新型农村集体经济高质量发展的内涵特征。研究表明,面向未来,可从治理、经济和社会三个维度优化社会主义市场经济条件下新型农村集体经济的高质量发展路径,为全面推进乡村振兴和实现农民农村共同富裕奠定更加坚实的物质基础和制度保障。 展开更多
关键词 新型农村集体经济 高质量发展 经营型集体经济 服务型集体经济 市场经济
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