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[Objective] The aims of this study are to clarify the coupling process between the landscape ecological security pattern and the multi-scenario simulation of the production-life-ecology space, and to provide reference for maintaining regional ecological security and optimizing the spatial development pattern of land. [Methods] As a constraint condition, landscape ecological security pattern was coupled to FLUS model. Four scenarios were set up by adjusting the cost of land conversion under different scenarios to predict the spatial structure and layout of production-life-ecology in target years (2025 and 2035). [Results] The scales of ecological land under low, medium and high security levels in Nanjing are 1 537.41, 2 576.85, 2 928.59 km², respectively, the proportions to the total land area are 23.34%, 39.12% and 44.46%, respectively. Compared to the other scenarios, the balanced development scenario maintains a certain degree of ecological security, various space changes tend to moderate. By 2025 and 2035, production space will only increase in 2.09 km² and 2.02 km², living space will increase in 28.55 km² and 46.27 km², and ecological space will decrease in 30.64 km² and 48.29 km². This scenario meets the demand of economic development for construction land, gives consideration to food security and ecological protection and promots the comprehensive, coordinated and sustainable development of economy, society and ecology. [Conclusion] Based on production-life-ecological balanced development, optimizing the development pattern of national land space is conducive to realizing intensive and efficient production space, livable and moderate living space, and beautiful ecological space. [ABSTRACT FROM AUTHOR]

The Gangnam District of Seoul in South Korea is the main gathering area of the wealthy middle class and a typical case of urban transformation led by the government. In South Korea, the real estate policy is the main means to safeguard the legitimacy of the government of various parties, while urban renewal and apartment reconstruction are important means to increase housing prices, which have different impacts on the residence and life of different social classes. Thus, apartment reconstruction is one of the triggers for the political struggle between Korean classes and parties. The residents of Gangnam District form communities of interests based on their class status and interests, and participate in activities that promote or hinder the re‐ construction of apartments. In the election of members of the National Assembly every four years, there is a class vote in Gangnam District that residents choose a party based on housing prices. The case shows that although the government dominates the apartment reconstruction of Gangnam District, when the redevelopment infringes on the interests of the residents, the political force of the residents appears, and it reversely interferes with housing policies in the form of votes. It is the interaction between Korean social groups and political parties that shaped the process of class differentiation and housing distribution in Gangnam District, Seoul. [ABSTRACT FROM AUTHOR]

Aiming at the problem of shelf instability caused by uneven distribution of goods in the existing three-dimensional warehouse, the seismic performance of the shuttle-type three-dimensional shelf was studied from the perspective of cargo distribution. Different cargo load ra­tios were formulated to study the eccentricity and center of gravity of the shelf. The finite element theory was used to study the mode shape of the shelf under different load conditions and the earthquake was applied in two directions to study the seismic response of shelves under differ­ent loads. By adding the tie rod and steel structure, and using the pseudo-static vibration experiment method, three different seismic performance enhancement schemes of the top tie rod, the Z-direction tie rod and the side wall steel frame were compared. The results indicate that the deformation of the shelf in the storage direction is related to the maximum eccentricity of the shelves stacked in the direction of the road­way, and the position of the vertically stacked goods has a greater influence on the shelf stability than the weight of the goods. The top of the shuttle shelf column is obviously deformed, and the shelf stability in the storage direction is sensitive. The side wall steel frame can signifi­cantly improve the seismic performance of the shelf. [ABSTRACT FROM AUTHOR]

[Objective] The dry matter accumulation and distribution of Angelica pubescens were studied, to provide theoretical basis for rational close planting and scientific fertilization. [Method] The dry matter of aerial part ( stems and leaves) and root were measured in different growth periods, then create fit curve to predict and analyze. [Result] The dry matter accumulation could be fitted curve well with the increase of the number of days after transplant. Under different planting density, the dry matter accumulation variation trends were similar. With the increase of density, the individual average accumulation got smaller and smaller, the area yield was more and more big, and the profit increased first and then decreased. [Conclusion]On the cultivation of Angelica pubescens, the density should be used 75 933 plants/ hm². The fertilization should be divided into parts and applied in small quantities and several times, and a proper increase in nitrogen fertilizer, to help you get a higher yield. [ABSTRACT FROM AUTHOR]

A program of flexible braided chassis was proposed for the limitation that yarn carriers on the chassis must be moved by whole column or row, and the low degree automation and poor application of current equipments that used to braid preforms for 3‐D braiding composites. Also the precision and structure of important components, drive and control of yarn carrier device were analyzed. In the program the power between drivers and yarn carriers was transferred by spring pin, and whether the yarn carriers device is moved by the driver was controlled by electromagnets. While the driving apparatus was reciprocated in two perpendicular directions, the path of any knitting yarn on this chassis can be controlled by changing the status of electromagnets. The maximum freedom in defining the shape and internal structure of braid textiles was provided by this chassis, getting the control program to be adjusted, then the needs of forming various shapes and variable cross‐section performance would be achieved. In addition, the mechanization and automation of braideding apparatus is improved, and a good foundation is laid on the mass production of pretorms. [ABSTRACT FROM AUTHOR]

Most existing class incremental learning methods employ data storage or extended network structures, but they cannot effectively alleviate the catastrophic forgetting problem due to memory resource limitation. To solve this issue, this paper proposed a brain-inspired generative replay approach. Firstly, it used VAE-ACGAN to simulate the memory self-organizing system to improve the quality of the generated pseudo-samples. Then, it used a shared parameter module and a private parameter module to protect the extracted features. Finally, the potential variables in the generator used a Gaussian mixture model to select specific replay pseudo-samples. The experimental results of the proposed method on MNIST, Permuted MNIST and CIFAR-10 show that the classification accuracy of the proposed method is 92.91%, 91.44% and 40.58%, respectively, which is significantly better than other class incremental learning methods. Furthermore, the backward transfer and forward transfer metrics reach 3.32% and 0.83% on the MNIST dataset, demonstrating that the model achieves a trade-off between task stability and plasticity, effectively preventing catastrophic forgetting. [ABSTRACT FROM AUTHOR]

The storage of massive point cloud data has great significance to the real-time 3D collaborative perception of autonomous driving. However, due to the requirements of data security and confidentiality, some data owners are unwilling to share their private point cloud data, which limits the improvement of model training accuracy. Federated learning is a computing paradigm that focuses on data privacy and security. This paper proposed a novel approach based on federated learning to address the challenge of large-scale point cloud semantic segmentation in collaborative vehicle perception scenarios. It integrated position encoding with inter-point angle information and geometric diffraction of neighboring points to enhance the feature extraction capability of the model. Finally, it dynamically adjusted the aggregation weights of the global model according to the generation quality of the local model to improve the ability to maintain the local geometric structure of the data. This paper applied the proposed method on three datasets, such as Semantic KITTI, SemanticPOSS and Toronto3D. The results show that the proposed approach significantly outperforms the single training data and the FedAvg-based method, and fully exploits the value of the point cloud data while taking into account the privacy sensitivity of each party's data. [ABSTRACT FROM AUTHOR]

目的 探讨综合护理模式配合骨水泥椎体成形术治疗骨质疏松性椎体压缩骨折 (OVCF) 的效 果. 方法 选取 2019 年 2 月至 2021 年 2 月该院收治的应用骨水泥椎体成形术治疗的 OVCF患 者78例作为 研究对象,采用随机数字表法分为观察组和对照组,每组39例. 对照组治疗期间接受常规围手术期护理,观察 组治疗期间接受综合护理. 比较 2 组患者疼痛程度及椎体前缘高度变化. 结果 2 组患者干预前视觉模拟疼 痛量表(VAS)评分比较,差异无统计学意义(P>0.05); 2 组患者干预后 VAS评分均有所下降,且观察组患者 干预后 VAS评分明显低于对照组,差异均有统计学意义(P<0.05). 2组患者术后3, 6个月髋部及腰椎正位 骨密度均明显高于术前,且观察组患者术后3, 6个月髋部及腰椎正位骨密度均明显高于对照组,差异均有统计 学意义(P<0.05). 2组患者术前椎体前缘高度, Cobb 角比较,差异均无统计学意义(P>0.05); 2 组患者术后 2 周椎体前缘高度, Cobb 角均有所改善,且观察组患者术后2周椎体前缘高度, Cobb 角均明显优于对照组,差 异均有统计学意义(P<0.05). 结论 对应用骨水泥椎体成形术治疗的 OVCF患者围手术期配合综合护理措 施能进一步保障疗效,改善患者骨密度. [ABSTRACT FROM AUTHOR]