This article studied a new inflatable mini-cold storage by using hollow fibres(dacron)as thermal insulation material. The contents related are inventing library structure,designing optimization,determining thermal insulation properties,and evaluating temperature control,then,analyzing fresh-keeping effect of red globe grape. The results showed that the densityof hollow dacronfibres was 5.3 kg·m-3,thermal conductivity was 0.031 W·m-1·K-1,moisturerate was 0.2%,tensile strength was 0.37 MPa,broken elongation was 140%. In addition,the fire resistance of hollow dacronfibres is very well. The library body of inflatable mini-cold storage possesses specificity,the apparent total heat transfer coefficient of envelop enclosure of the mini-cold storage was 0.097 W·m2·K-1,entire thermal resistance is 10.20 m2·K·W-1(the national standard of entire thermal resistance was 3.0 m2·K·W-1),which reached the designed standard of international commercial mini-cold storage and civil assembled mini-cold storage,and fresh-keeping effect of inflatable mini-cold storage issuperiorto common civil storage.
Aiming at the shortage of the energy-saving technique in traditional sunshine greenhouse,the paper combining with the insulation materials of vitreous micro-bead and the physical and chemical characteristics of the pearl rocks,from the optimization and biological technology application,indicates the way how to lead the way of improving the energy-saving performance of traditional sunshine greenhouse and production efficiency to the vitreous micro-bead materials and pearl bead in low-consuming greenhouse.
This paper reports the first step of a study to evaluate the lateral resistance capacity of Round bamboo shear walls and its mechanical properties under Monotonic and cyclic loading conditions. The bamboo shear walls are built with round bamboo as its stub and with ply-bamboo sheet as its sheathing. Load-displacement curves of six round bamboo shear walls, with three different connection types, were obtained in this experiment, and the test results showed that the lateral resistance capacity of round bamboo shear walls can exceed 4.0kN/m, satisfying the projects requirement. A combination of nail and panel failures were observed in the test.
Vision-based 3D occupancy prediction has become a popular research task due to its versatility and affordability. Nowadays, conventional methods usually project the image-based vision features to 3D space and learn the geometric information through the attention mechanism, enabling the 3D semantic occupancy prediction. However, these works usually face two main challenges: 1) Limited geometric information. Due to the lack of geometric information in the image itself, it is challenging to directly predict 3D space information, especially in large-scale outdoor scenes. 2) Local restricted interaction. Due to the quadratic complexity of the attention mechanism, they often use modified local attention to fuse features, resulting in a restricted fusion. To address these problems, in this paper, we propose a language-assisted 3D semantic occupancy prediction network, named LOMA. In the proposed vision-language framework, we first introduce a VL-aware Scene Generator (VSG) module to generate the 3D language feature of the scene. By leveraging the vision-language model, this module provides implicit geometric knowledge and explicit semantic information from the language. Furthermore, we present a Tri-plane Fusion Mamba (TFM) block to efficiently fuse the 3D language feature and 3D vision feature. The proposed module not only fuses the two features with global modeling but also avoids too much computation costs. Experiments on the SemanticKITTI and SSCBench-KITTI360 datasets show that our algorithm achieves new state-of-the-art performances in both geometric and semantic completion tasks. Our code will be open soon.
Along with the deepening of the IPO reform in China,it becomes the focus of attention in society once again. The literature review contains many theoretical hypotheses,mainly including the reasons of IPO,modes of issuing,three IPO's anomalies,etc. A comprehensive review,summarization and comments of theoretical hypothesis of IPO will provide theoretical support and scientific basis for deepening the reform of China's IPO.
Aiming at the complexity and unknown of the modern robot-team parking mission environment, we proposed the maximal obsidional uniform distribution principle, the first nearest parking-point was enclosed by another parking-point according to uniform distribution. Based on it, we used the "Hungary Method" to realize the shortest total path length parking strategy. It was to form a benefit matrix which was composed of each the outside path length of the inclosing circle from robots to parking points, and then the best assignment was obtained by using "Hungary Method". In this paper, it's also considered two parking assignment strategies, which were shortest system executing time strategy and scope of inclosing circle seeable view strategy. The experiment result is shown that the robot-team can complete the reconnaissance parking mission efficiently. Additionally, the real-time performance is also fine.
Objective To investigate organic indicators and its influencing factors in finished water of domestic water treatment units(WTUs) with activated carbon filters in Shanghai. Methods A total of 248 families were chosen in Shanghai and the finished water samples of WTUs were collected for the determination of COD and TOC in summer(Jul.),autumn(Oct.),and winter(Dec.), and the influencing factors were investigated. Results The unqualified rates for COD were 37.5% in summer,33.6% in autumn and 37.9% in winter. The unqualified rates for TOC of treated water was 0.8% in summer, meanwhile, TOCs were qualified in autumn and winter. Multivariate analysis showed that treated water volume of the filter was positively correlated with the unqualified rates of COD in summer, autumn and winter. There were positive correlations between COD and TOC in each season. Conclusion The main influencing factors for removal rate of organic compounds for domestic WTUs with activated carbon filters are treated water volume, the water quality of raw water. It is necessary to replace the activated carbon filters in time.
The current distribution network hardware in the loop (HIL) simulation testing relies on specialized hardware, which is costly and requires a large workload of control strategy development. This paper proposes a simulation testing method for distribution network control based on embedded energy management system (EMS) and Matlab. Firstly, an embedded EMS architecture is designed, including communication layer, data layer, background service layer, and display layer. Secondly, control configuration is implemented based on the AOE network and automatic differentiation technology, which supports the simple implementation of distribution network control strategies through "building block". Based on technologies such as the Rust programming language, HTTP container, embedded database, asynchronous non-blocking communication, and WebAssembly, the EMS that can be deployed on embedded devices has been implemented. Thirdly, achieve HIL simulation testing through communication between the embedded EMS and Matlab simulation model. Finally, the effectiveness of the proposed method was verified through the orderly charging control experiment on charging piles in the distribution station area.
