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Copyright of Journal of Ballistics / Dandao Xuebao is the property of Journal of Ballistics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ballistics / Dandao Xuebao is the property of Journal of Ballistics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong is the property of PetroChina Southwest Oil & Gas Field Company and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Hubei Open Vocational College is the property of Journal of Hubei Open Vocational College Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Metal Working (1674-165X) is the property of Metal Working Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Fermentation Industries is the property of Food & Fermentation Industries and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Greenhouses have been widely used in facility agriculture at present. Gutter-connected greenhouses have been also extensively implemented to enhance the structural span for high land utilization with simplified mechanization. Among them, Venlo greenhouse has been the preferred choice among various forms of roof trusses, due to the simplified installation, superior light transmittance, and excellent sealing. The "National standard for the design of greenhouse structure " also released that "seismic action shall be calculated in the structural design of glass greenhouse for agricultural production in areas with seismic fortification intensity of 8 degrees (0.30g) and above". In this study, a regular-shaped Venlo-type greenhouse was designed to investigate the seismic performance and response using a shaking table test. A scaled-down model was then established with one span and two openings. The dynamic features of the modeled structure were analyzed to determine the acceleration response of the structure under the action of the 7-degree frequent, 7-degree fortification intensity, 7-degree rare, 8-degree rare, and 8-degree semi-rare earthquake. Numerical simulation was carried out in conjunction with finite element (FE) ANSYS software. The test and simulation were compared to verify the reliability of dynamic time-range analysis. In addition, the numerical model was established, according to the structural design of a Venlo greenhouse project. The time-history analysis was carried out under the action of 8 degrees and half rare earthquakes (the maximum acceleration time history was 0.51g). Meanwhile, the combination of permanent, snow, and crop load was selected, according to the specification. Three groups of seismic waves (namely AKT, NGA, and artificial wave) were input into the structure of the greenhouse. The mode of structure was analyzed to determine the internal force, vibration pattern and displacement with/without the action of the seismic waves. The results show that the maximum stresses in the overall structure of the greenhouse under seismic action were 1.24-2.12 times higher than those under no seismic action. The structural stresses during the action of artificial waves exceeded the yield strength of the material. Two cases (b1 and b2) were applied under the action of the same set of seismic waves. The b1 case was adopted to combine the live load with crop and snow loads, whereas, the b2 case combined the crop load only. There were similar values in the column top displacements. The seismic action dominated the column top displacements in these cases. The maximum displacements occurred in the outside wall storm columns. The largest displacement response was observed at the top of the structural columns under the action of artificial waves. The maximum of up to 72.17 mm exceeded the standard requirement of 1/250 of the elastic inter-story displacement angle for the seismic design of Chinese buildings. The research results can provide a theoretical reference for the safe design of Venlo greenhouse under seismic action. [ABSTRACT FROM AUTHOR]

Copyright of Cotton Textile Technology is the property of Cotton Textile Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong is the property of PetroChina Southwest Oil & Gas Field Company and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Solar greenhouses have been widely used in modern precision agriculture in China. However, potential negative environmental impacts can also be introduced, including atmospheric pollution, soil contamination, and water pollution. Great challenges have been posed on the rational management of farmlands and resource utilization. Meanwhile, the manual collection of visual data cannot fully meet the rapid acquisition of information from large-scale greenhouse facilities. In this study, Chinese solar greenhouses (CSGs) were focused on detecting the damage levels from the remote sensing images using an improved YOLO-DLSG (YOLO-damage level of solar greenhouse) object detection model. Comparative experiments were conducted using high-resolution solar greenhouse remote sensing image datasets. A dataset was collected with the 3235 images of solar greenhouses and then subjected to data augmentation. The classification standards were also combined with the damage indicators specific to solar greenhouses. The damage levels were then established from the high-resolution remote sensing satellite images. The YOLOv5s lightweight improvement was employed to reconstruct the YOLOv5s backbone with the lightweight MobileNetV3 architecture. This restructure reduced the channel dimensions and network parameter volume. Furthermore, the upsampling operator in the neck layers was replaced and then updated. A lightweight upsampling operator was selected as CARAFE (content-aware reassembly feature embedding), using an upsampled kernel prediction module. The feature recombination module was reconstructed in the upsample structure. EVCBlock (explicit visual center block) was utilized to further reduce the computational complexity for the high accuracy of detection on rotating objects. Finally, the CIoU (complete intersection over union) loss function for the target bounding box regression was replaced with the EIoU (Enhanced Intersection over Union) loss, in order to accelerate the convergence of the prediction box regression loss function for the high accuracy of prediction box regression. The experimental results show that the improved model reduced the number of parameters and floating-point operations per second by 17.91 and 15.19 percentage points, with an increase of 0.4 and 0.8 percentage points in the precision and mean average precision, respectively. Compared with the current mainstream lightweight models, such as SSD, Faster R-CNN, Centernet, YOLOv3-spp, and YOLOv3-tiny, the improved YOLO-DLSG model demonstrated superior performance, in terms of accuracy, recall, detection speed, and model lightweight. Data collection and accuracy validation were conducted in the Yangling Agricultural Demonstration Zone in Shaanxi Province of China. An average recognition accuracy of 84.00% was achieved in the improved model. A challenging task was to determine the distribution, quantity, and extent of greenhouse damage in a cost-effective, efficient, and user-friendly manner. This finding can provide a simple and effective way for the rapid location and automatic quantity extraction of solar greenhouses with different damage levels. [ABSTRACT FROM AUTHOR]

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: Percutaneous long-arm single-axis pedicle screw fixation and minimally invasive percutaneous single-plane pedicle screw internal fixation are both classical minimally invasive surgical options commonly used in clinical practice, but the two surgical methods in the treatment of thoracolumbar fractures are still controversial. OBJECTIVE: To compare the advantages and limitations of two procedures, long-arm single-axis pedicle screw percutaneous approach and minimally invasive percutaneous single-plane pedicle screw internal fixation, in the treatment of thoracolumbar fractures. METHODS: Ninety patients with thoracolumbar fractures admitted to Shenzhen Hospital of Guangzhou University of Chinese Medicine from March 2017 to June 2021 were included and assigned to the control group (n=45) and the trial group (n=45). The control group received minimally invasive percutaneous single-plane pedicle screw internal fixation. The trial group received long-arm single-axis pedicle screw percutaneous approach. The indexes related to perioperative general condition, pain level, and recovery were compared between the two groups. RESULTS AND CONCLUSION: (1) Compared with the control group, the trial group had less intraoperative blood loss, shorter operative time and hospital stay (P < 0.05). (2) At 2 weeks and 1 month after operation, Oswestry dysfunction index score and Cobb angle in the trial group were lower than those in the control group (P < 0.05). The anterior and posterior heights of the injured vertebra were higher in the trial group than those of the control group (P < 0.05). At 2 months after operation, the Oswestry dysfunction index score and Cobb angle in the trial group were lower than those in the control group (P < 0.05). There was no significant difference in the anterior and posterior heights of the injured vertebra between the two groups (P > 0.05). At 2 weeks after operation, the visual analog scale score was lower in the trial group than that in the control group (P < 0.05). (3) Among the 45 cases in the control group, there were 2 cases of incision infection, 2 cases of dyskinesia, and 1 case of implant-related adverse reactions, with a total incidence rate of 11%. Among the 45 cases in the trial group, there were 2 cases of dyskinesia, and the total incidence was 4%. There was no significant difference in the total incidence of complications between the two groups (P > 0.05). (4) Both long-arm single-axis pedicle screw percutaneous approach and minimally invasive percutaneous single-plane pedicle screw internal fixation can achieve better results in the treatment of thoracolumbar fractures. However, the former has shorter operative time and less intraoperative blood loss, so the former is the ideal surgical option for obtaining the same benefit. [ABSTRACT FROM AUTHOR]

Copyright of China Sciencepaper is the property of China Sciencepaper and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Geodesy & Geodynamics (1671-5942) is the property of Editorial Board Journal of Geodesy & Geodynamics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Modern Laboratory Medicine is the property of Journal of Modern Laboratory Medicine Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

基于Micaps常规资料、NCEP再分析资料和中尺度自动站雨量资料，结合WRF高精度数值模拟输出的诊断物理量，研究了 2013年10月7日20：00至8日08：00发生于浙江东北部的短时大暴雨天气过程的成因.结果表明：这次大暴雨过程主要由台风“菲特”残留云系、超强台风“丹娜丝”和北方的弱冷空气共同影响产生；假相当位温及地面风场的分布很好地反映了此次大暴雨过程中的不稳定强对流及冷暖空气交汇的形势.垂直螺旋度、湿位涡的分布及演变情况与强降水的移动及强度变化有很好的对应关系，暴雨区上空螺旋度对应上负下正的垂直分布形势，低层的湿位涡分布与暴雨中心对应较好，对暴雨落区和暴雨中心有一定的指向作用.这对今后预报秋季台风外围大暴雨过程有指示意义.

基于NCEP的FNL资料，对2011年6月18~19日长江中下游出现的一轮暴雨过程进行分析，发现本轮暴雨过程分别与对流不稳定层结和地面气旋发展有关.应用位涡理论进行诊断，结果显示，大气湿斜压发展，MPV1 负中心下滑触发中低层不稳定层结，产生对流不稳定强降水，实况强降雨区与低层850 hPa MPV1负中心对应较好.低层锋区冷空气下滑，气旋发展，遇地形作用，暴雨增幅.高层位涡增强东移，引导低层位涡越山发展；高层干空气南下侵入中低层气旋上空，转为上升气流，一方面增强了低空气旋的发展，使不稳定降水增加；另一方面，产生的次级环流又使气旋发展持续，从而强降水维持.

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Automotive Digest is the property of Automotive Digest Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Shaanxi University of Science & Technology is the property of Journal of Shaanxi University of Science & Technology Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To assess the slope stability after underground and open-pit mining in synergy in Shizhuyuan Polymetallic Mine, a thorough understanding of geological conditions and rock mechanical parameters is necessary. By carrying out the uniaxial compressive strength test, splitting tensile test, and shearing test, the mechanical property and parameters of standard specimens are measured including compressive, tensile, and shearing strength, as well as cohesiveness, internal friction angle, and elastic modulus. Given the subjective and fuzzy problems existing in the traditional rock mechanical parameter reduction, a fuzzy mathematical method combining indoor rock specimen test and engineering geological data is used for the reduction, obtaining the rock mechanical parameters that are reasonable and accurate and can be applied in actual engineering analysis and modeling calculation. [ABSTRACT FROM AUTHOR]

Copyright of Forest Engineering is the property of Forest Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Soil heavy metal pollution in China is serious, threatening people ' s health and causing huge economic losses. The commonly used remediation technologies for heavy metal contaminated soil are based on physical, chemical and biological methods and their combination. This paper introduces the forms and sources of heavy metals in soil and the mechanism, influencing factors, advantages and disadvantages of commonly used remediation technologies, and compares the applicability of commonly used remediation technologies from three aspects : remediation cost, remediation time and long-term effect, so as to provide some reference for scholars in this field to develop remediation schemes for heavy metal contaminated soil in practical engineering applications. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

1型糖尿病 (T1DM) 因胰岛功能衰竭、胰岛素绝对缺乏, 患者血糖波动大, 治疗与管理困 难。近十年国内外 T1DM 研究取得了重要进展, 《中国 1 型糖尿病诊治指南 (2021 版）》应运而生。 2021 版指南在 2012 版首部《中国 1型糖尿病诊治指南》的基础上更新修订, 强调个体化精准诊治, 推 动新知识、新理念、新技术和新方法的综合应用, 旨在规范我国 T1DM 的诊断治疗和综合管理, 提高 T1DM 及其血糖、并发症的控制与预防水平, 持续改进患者生活质量. [ABSTRACT FROM AUTHOR]

利用淮河水循环试验的加密探测资料对1999年6月下旬暴雨个例进行分析,探讨形成暴雨的梅雨锋扰动的环境条件、演变规律、结构特征与降水的关系.分析表明:低空急流的存在是梅雨锋扰动发展的重要动力和热力条件,尤其是在边界层;对流层下部较深厚的不稳定层结的存在,成为持续暴雨的重要条件;锋生锋消对于梅雨锋附近有无降水起到了重要的作用.

Atrial fibrillation (AF) is the most common arrhythmia in clinical practice. The missed diagnosis rate of AF is high in screening by traditional means, therefore early diagnosis is a great challenge. Artificial intelligence (AI) has broken through the limitations of traditional methods and has shown its unique advantages and broad prospect of application in the screening, diagnosis and treatment of AF. This article reviews the progress of AI applied in the diagnosis and treatment of AF. [ABSTRACT FROM AUTHOR]

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Architecture & Civil Engineering is the property of Chang'an Daxue Zazhishe and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

骨髓间充质干细胞（BMSCs）是从骨髓中提取、分离、鉴定及纯化出来的干细胞，能在诱导成骨培养液条件下 分化为成骨细胞，具有诱导新骨生成、促进血管生成的作用。从纯化的BMSCs提取、分离出细胞外囊泡（EVs），获取的 EVs具有与BMSCs相似的作用。研究发现，BMSCs衍生的EVs可激活磷脂酰肌醇3-激酶/蛋白激酶B（PI3K/Akt）信号 通路，从而促进成骨细胞分化。推测BMSCs-EVs在骨质疏松症中发挥重要作用，并受PI3K/Akt信号通路调控. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Diabetes Mellitus is the property of Chinese Journal of Diabetes Mellitus and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cotton Textile Technology is the property of Cotton Textile Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Shanghai Jiaotong University (Medical Science) is the property of Journal of Shanghai Jiaotong University (Medical Science) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)