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提出一种快速装配式工字钢梁的悬臂梁段拼接节点，该节点由悬臂梁段、横隔板、加劲肋组成。通过改变加劲肋厚度和肢长、横隔板厚度和锚固长度、T形凸起区长度、剪跨比、截面尺寸、补强方式和试件加载方式。利用ABAQUS软件，分析了该设计节点的破坏模式和受力机理，得到了荷载-位移曲线。研究结果表明：改变上侧加劲肋厚度、T形凸起区长度和补强方式对节点的抗剪承载力影响较大，T形凸起区长度设计为170 mm（T形凸起区长度/腹板高度的一半=0.85）时，或凸起位置设置加劲肋，可以防止集中力位置的腹板发生局部屈曲，且节点抗剪承载力与原截面基本相当；角钢形加劲肋可加强腹板，并有效防止连接部位发生局部屈曲。

近年来，数字生成内容技术得到了极大的发展，数字内容的检测和取证技术面临新的挑战。首先从自然语言大模型、视觉生成技术、多模态生成技术3个方面介绍数字内容生成技术，从生成文本检测、生成图片检测、生成音视频检测3个方面介绍数字内容检测技术，从利用事实信息和伪造痕迹两方面介绍数字内容取证技术；接着介绍这些技术的应用场景；最后对该研究领域的未来工作进行展望，指出几个需要重点关注的方向。

Copyright of Journal of Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences 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.)

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Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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.)

The object detection based on video has the problem of poor recognition effect in bad weather, so it is necessary to make up for video defects and improve the robustness of detection framework. In view of this problem, this study designs an object detection framework based on radar and video fusion. YOLOv5 (You Only Look Once version 5) network is used to obtain image feature map and image detection frame, density-based clustering is used to obtain radar detection frame, and radar data is encoded to get object detection results based on radar information. Finally, the detection boxes of the two are superimposed to obtain a new ROI (Region of Interest), and the classification vector after fusion radar information is obtained, which improves the detection accuracy in extreme weather. The experimental results show that the mAP(mean Average Precision) of the framework reaches 60.07%, and the parameter number is only 7.64 x 10°, which indicates that the framework has the characteristics of lightweight, fast computing speed and high robustness, and can be widely used in embedded and mobile platforms. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery 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.)

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Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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.)

A tea vibrating-shifting machine is one of the most important equipment in the tea refining process. The low screening performance of traditional vibrating-shifting machines cannot fully meet the large-scale production in recent years, due to the low sieve net rate and high error screen rate. In this study, the virtual prototype was constructed to combine with the screening principle of the vibrating-shifting machine by Solidworks. A discrete element simulation model of tea particles was established by EDEM software. A systematic analysis was made to clarify the motion state of tea particles on the sifting surface. The dynamic simulation was carried out on the vibrating-shifting process of tea particles. A single-factor test was also conducted to obtain the average velocity and average interaction force curve of tea particles. The simulation results show that the connecting rod length, the crank radius, and the sift inclination of the surface were the main influencing factors in the screening performance of the tea vibrating-shifting machine. A three-factor three-level quadratic rotation orthogonal test was designed to perform the regression analysis on the test data using Design-Expert software, where the connecting rod length, the crank radius, and the sift inclination of the surface were taken as the influencing factors, while the sieve net rate and the error screen rate were as the evaluation indexes. The regression analysis showed that the best screening performance of the tea vibrating-shifting machine was achieved, where the sieving rate of the tea vibrating-shifting machine was 94.5%, and the false sifting rate was 4.61%. An optimal combination of parameters was the connecting rod length of the tea vibrating-shifting machine was 1 977 mm, the crank radius was 25 mm, and the sift inclination of the surface was 2.8°. The verification test was carried out with the optimal structural parameters of the tea vibrating-shifting machine. The false sifting rate of the tea vibrating-shifting machine before optimization was 90.7%, the false sifting rate was 5.12%, and the production efficiency was 293 kg/h. After optimization, the false sifting rate of the tea vibrating-shifting machine was 93.8%, and the false sifting rate was 4.73%. The verification test and regression analysis were basically the same agreement. At the same time, the production efficiency of the tea vibrating-shifting machine was 319 kg/h. The false sifting rate increased by 3.42%, the false sifting rate decreased by 7.62%, and the production efficiency increased by 8.87%, compared with before optimization. This finding can provide a theoretical basis for the optimization of tea screening equipment. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery 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.)

To explore the method and significance of pelvic floor peritoneal reconstruction after abdomino-perineal resection for low rectal cancer. By searching the literature on pelvic floor structure reconstruction and pelvic floor peritoneum reconstruction after rectal cancer surgery, and reviewing the pelvic floor reconstruction technology of rectal cancer, it is found that it is necessary to close the pelvic floor peritoneum after laparoscopic abdomino-perineal resection of rectal cancer. Although it increases the difficulty of surgery for surgeons, it can reduce the incidence of pelvic and perineal infection, intestinal adhesion, intestinal obstruction and radiation enteritis, and improve the quality of life of patients. This article reviews the methods of pelvic floor reconstruction and pelvic floor peritoneal reconstruction and their advantages and disadvantages. [ABSTRACT FROM AUTHOR]

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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 Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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 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.)

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Copyright of Journal of Electrochemistry is the property of Journal of Electrochemistry 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 on Communication / Tongxin Xuebao is the property of Journal on Communications 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.)

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Copyright of Telecommunication Engineering is the property of Telecommunication 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.)

A large number of ancillary products are inevitably produced during the anaerobic digestion of livestock and poultry manure. Among them, biogas slurry contains a high number of available nutrients, like nitrogen, phosphorus and potassium, as well as amino acids, humic acids, and indoleacetic acids. Correspondingly, biogas slurry is often used in agricultural practices in the form of organic liquid fertilizer. However, there are also many pollutants in the biogas slurry, such as high concentrations of ammonia nitrogen, total phosphorus, heavy metals and some refractory organic substances including antibiotics. Therefore, the discharge of biogas slurry without appropriate treatment is extremely likely to cause ecological and environmental risks, such as water eutrophication, soil acidification, and pollutant accumulation. Nevertheless, the reclamation and reuse of biogas slurry can be expected as the potential of promoting a circular economy and sustainable development worldwide from the viewpoint of resource reutilization. Fortunately, the microalgae-bacteria symbiosis system can serve as an emerging technology to treat the biogas slurry in a sustainable manner in recent years. Much attention has been gained in the biogas slurry treatment, due to the lower cost, higher efficiency, and much more environmental friendliness than before. Particularly, the microalgae-bacteria symbiosis system can be used to efficiently remove nitrogen, phosphorus, heavy metals, and antibiotics, in order to provide the sound purification of biogas slurry. The contributions can also be found in the recovery of nutrients from biogas slurry and the utilization of CO2 for photosynthesis, leading to the microalgae biomass of biofuel value. Therefore, a systematic and latest review was proposed on this symbiosis system to consider the substantial development potential and great application prospects. The symbiotic mechanisms between microalgae and bacteria were first summarized, and then to provide a systematic review from the perspectives of the types of microalgae-bacteria symbiosis system, pollutant removal mechanisms and influencing factors. The symbiotic relationships between microalgae and bacteria included nutrient exchange, signal transduction, and gene transfer, thus supporting the operation of the microalgae-bacteria symbiosis system. Three types were divided, i.e., free type, attached type, and microalgae-bacteria photobioreactor, according to the existential state of microalgae and bacteria in the system and development sequence. No matter what type the system was, it was necessary to fully coordinate the pre-treatment of biogas slurry with the docking of the reactor in the process of system establishment, in order to maximize the purification performance and resource utilization potential. Besides, an overview was provided on the system’s removal of nutrients (i.e., nitrogen and phosphorus), refractory organic compounds, and heavy metals from biogas slurry. The microalgae-bacteria symbiosis system showed a lower energy demand and cost than before, indicating the effective performance of resource recovery. In addition, a brief discussion was conducted on the effects of microalgae-bacterial type/ratio and environmental factors (i.e., nutrients, aeration rate, pH, temperature, light conditions, heavy metals, and antibiotics). The appropriate environmental factors and type/ratio of microalgae-bacteria played a crucial role in the better growth and metabolism of microalgae, the removal of pollutants, and the stability of the system. Finally, the main challenges of this system were proposed for the promising research directions. A relatively complex mechanism was found in the microalgae-bacteria symbiosis under the biogas slurry environment. By far, it was still unclear on the information about signal transduction and gene transfer between microalgae and bacteria. Besides, the promising directions were the coordination and docking between pretreatment and reactors. More importantly, the full chain of resource recycling can be realized from the notorious biogas slurry to the valuable microalgae biomass-based refined products. The study can also provide the scientific basis and theoretical guidance on the future large-scale application of microalgae-bacteria symbiosis system for biogas slurry treatment. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Andrology is the property of Chinese Journal of Andrology 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.)

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Sloping farmland has been seriously eroded and degraded in black soil regions in Northeast China, particularly harmful to sustainable food production. Conservation tillage can be an efficient measure to reduce soil and water loss for better control of soil degradation. Soil organic carbon content (SOC) can also be expected to increase the SOC fractions. This study aims to explore soil quality restoration under long-term conservation tillage. A continuous 15a conservation tillage field experiment was conducted in the typical black soil sloping farmland in Hailun country, Suihua City, Heilongjiang Province of north China. A systematic investigation was implemented to clarify the effect of conservation tillage on the SOC fractions of degraded black soil by erosion. Two field experiments were carried out in the Hailun Soil and Water Conservation Monitoring Research Station, Chinese Academy of Sciences, including the conservation tillage (NT), and conventional tillage (CT) with corn-soybean rotation mode year by year. The NT treatment was no tillage with the mulch of all straw returning to the field. The soil was sampled in 0～5, >5～10, >10～15, >15～20, >20～40, >40～60, >60～80, and >80～100 cm soil layers in the top, middle, and bottom of the experiment field. Some parameters were measured, including the total SOC, total nitrogen (TN), particulate organic carbon (POC), mineral-bounded organic carbon (MOC), light fraction organic carbon (LFOC), dissolved organic carbon (DOC), and microbial biomass carbon (MBC) contents. A comparison was also made on the differentiation between NT and CT modes. The vertical distribution and changing characteristics of SOC were obtained for the different carbon fractions along the soil profile. The results showed that: (1) The NT increased the SOC content in the 0-5 and 5-10 cm soil layers by 29.54% and 22.38%, respectively ( P <0.05), compared with the CT. The SOC storage increased by 31.11% and 27.34%, respectively ( P <0.05), and the TN content increased by 53.74% and 37.60%, respectively ( P <0.05). The SOC and TN content in the surface soil increased significantly, whereas, there was no significant change in the SOC and TN content in the deep soil. (2) The NT mainly increased the POC content of 5-10 cm soil layers by 69.85%, respectively ( P <0.05), and the LFOC content of 0-5 cm soil layers by 130.81%, respectively ( P <0.05), and the MBC content of 0-5 and 5-10cm soil layers by 85.59% and 59.53%, respectively ( P <0.05), indicating a certain positive impact on the organic carbon composition of deep soil. The POC, MOC, LFOC, and MBC contents decreased with the increase of the soil layer, while the DOC contents increased. In addition, the ratio of POC/SOC, LFOC/SOC, and MBC/SOC decreased with the increase of soil layers, while the ratio of DOC/SOC increased. (3) The NT shared a significant impact on the soil aggregate stability indicators, in terms of tillage effect. The soil aggregate stability indicators were dominated to improve the SOC content. The NT mainly increased the content of active organic carbon after 15a continuous conservation tillage, compared with the CT. Long-term conservation tillage posed a positive effect on the restoration of black soil quality. Both the topsoil and subsoil organic carbon were dependent on the long-term conservation tillage. The finding can provide a strong reference for the soil carbon sequestration in sloping farmland under long-term conservation tillage. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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: Calcitonin acts as a classic anti-osteoporosis drug and has been widely used in clinical anti-osteoporosis treatment. Increasing studies have found that it also has a marked effect in the treatment of osteoporotic fractures. OBJECTIVE: To evaluate the clinical efficacy and safety of calcitonin in the treatment of postmenopausal osteoporotic hip fractures. METHODS: A prospective randomized control trial was conducted. Sixty elderly patients with osteoporotic hip fractures were enrolled and randomly assigned to an experimental group or a control group in a 1:1 ratio. The experimental group was given domestic calcitonin (once a week) combined with calcium carbonate+vitamin D (once a day) for 6 months; and the control group was given calcium carbonate+vitamin D (once a day) for 6 months. Clinical efficacy and safety of calcitonin were then evaluated by comparing bone turnover marker, fracture healing rate, bone mineral density, serum calcium, serum phosphorus and adverse effects between two groups. RESULTS AND CONCLUSION: Both experimental group (n=26) and control group (n=28) completed the experiment and their baseline data were basically the same. Calcitonin could significantly inhibit the mass concentration of C-terminal crosslinked telopeptides of type 1 collagen at 8, 12, and 24 weeks (P < 0.01) and improve visual analogue scale score at 4 and 8 weeks (P < 0.01) but have no effect on fracture healing, serum calcium and serum phosphorus levels. (3) There were no significant differences in bone mineral density and adverse effects between the two groups. To conclude, calcitonin can reduce postoperative high conversion state, reduce acute bone loss, relieve postoperative pain, and have good safety in postmenopausal osteoporotic fracture patients. [ABSTRACT FROM AUTHOR]

Copyright of Energy Chemical Industry is the property of Energy Chemical Industry 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 Chinese Journal of Osteoporosis is the property of Chinese Journal of Osteoporosis 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.)

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Copyright of Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction 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 Guangdong University of Technology is the property of Journal of Guangdong 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.)