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对周围车辆轨迹的精确预测可以辅助自动驾驶车辆做出合理的即时决策。虽然相比传统轨迹预测算法，深度学习方法已取得较好效果，但是自动驾驶车辆在异构高动态复杂变化环境下实现多模态高精度预测仍存在信息丢失、交互和不确定性难以建模、预测缺乏可解释性等问题。Transformer具备的长距离建模能力和并行计算能力使其不仅在自然语言处理领域取得巨大成功，而且在扩展至自动驾驶多模态轨迹预测任务时也解决了以上问题。基于此，对过去基于深度神经网络的方法，特别是对基于Transformer的方法进行全面总结与回顾；同时分析了Transformer相较于传统序列网络、图神经网络、生成模型的优势，并结合现有难题进行针对性分析与分类。Transformer模型可以更好地应用于多模态轨迹预测任务，此类模型具有更好的泛化性和可解释性。最后，对多模态轨迹预测未来发展方向进行了展望。

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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 Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute 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 Medicine & Health is the property of Journal of Modern Medicine & Health 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 China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher 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 China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher 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 Railway Construction Technology is the property of Railway Construction 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 Zhengzhou University (Natural Science Edition) is the property of Journal of Zhengzhou University (Natural Science Edition) 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 Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society 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.)

BACKGROUND: Osteonecrosis of the femoral head is a common and disabling disease, which is mainly characterized by microcirculation disorders and bone cell metabolism disorders. Luzhongjiangu decoction was developed by Shandong Academy of Chinese Medicine and used in the form of soup in the clinic, which has good efficacy in the treatment of osteonecrosis of the femoral head. However, its mechanism of action has not been clarified. OBJECTIVE: To study the effect mechanism of Luzhongjiangu decoction on intestinal flora in rats with osteonecrosis of the femoral head based on 16S rDNA sequencing technique. METHODS: The model of osteonecrosis of the femoral head was established in Wistar rats by intragastric administration of retinoic acid. The therapeutic effect of Luzhongjiangu decoction was evaluated by serum hormone, bone histopathology and serum hormone levels. 16s rDNA sequencing technique was used to detect the intestinal flora of rats in the blank control group, model group and middle-dose Luzhongjiangu decoction group. The corresponding library was constructed and OTU clustering and microbial community diversity and abundance analysis were carried out to determine the composition of intestinal flora and the changes of species and diversity among groups. RESULTS AND CONCLUSION: Luzhongjiangu decoction could significantly increase the expression of osteocalcin, osteopontin and other osteogenic related factors, alleviate the destruction of bone trabeculae, increase bone mineral density, and had a significant therapeutic effect on osteonecrosis of the femoral head, of which the middle dose group showed the most significant effect. The results of intestinal flora sequencing showed that Luzhongjiangu decoction improved the flora disorder of rats with osteonecrosis of the femoral head to some extent, and screened out different colonies such as Bacillus, Desulfurizans, Desulfurization, Isobacteria, Bifidobacterium and so on; it could up-regulate the abundance of beneficial bacteria such as Bifidobacterium, down-regulate the abundance of harmful bacteria such as Desulfovibrio, and improve the structure of intestinal flora. Functional prediction analysis indicated that Luzhongjiangu decoction could mainly affect amino acid metabolism and energy metabolism. Correlation analysis showed that the differential bacteria of Bifidobacterium and Intestinimonas in the middle dose group of Luzhongjiangu decoction were positively correlated with vitamin D3, estradiol and calcitonin, and negatively correlated with prostaglandin E2. In the model group, Escherichia-Shigella, Desulfovibrio, Globicatella and Streptococcus were positively correlated with prostaglandin E2 and negatively correlated with vitamin D3, estradiol and calcitonin. To conclude, Luzhongjiangu decoction may play a role in the treatment of osteonecrosis of the femoral head by regulating the structure of intestinal flora, up-regulating the abundance of beneficial bacteria and affecting the secretion of vitamin D3, estradiol, calcitonin and prostaglandin E2. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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.)

[Objective Aggregated stability is an important indicator for assessing changes in soil quality after vegetation restoration in degraded ecosystem. The aims of this study are to investigate the difference of soil aggregate stability and its change mechanism of main forest types in central Yunnan, and to provide scientific support for tree species selection and forest resource scientific management in the process of vegetation restoration and transformation in the future. Methods] Six primary forest types, including Pinus yunnanensis forest (PY). Pinus armandii forest (PA). Acacia dealbata forest (AD) and Alnus cremastogyne forest (ACF). Theropencedrymion forest (TF), and Secondary evergreen broad-leaved forest (SF). were selected for the study. Dry slope land (DSL) was used as a control. Soil samples were collected from depths of 0-20 cm, 20-40 cm, and 40-60 cm. Dry sieving and wet sieving methods were employed to classify aggregates into four size classes: 5 mm.5~2mm.2~0.25 mm and 0.25 mm. Four stability indices, including WR. mean weight diameter (MWD), geometric mean diameter (GMD) and structural failure rate (PAD), were calculated to investigate soil aggregate stability. [Results] (1) Among the six forest types, aggregates with a particle size range of 0.25-2 mm predominated in the 0-60 cm soil layers, while DSL shifted from 0.25-2 mm to 0.25 mm with increasing soil depth. (2) In the 0-60 cm soil layer WR MWD. GMD. and PAD values in DSL. were 55.40%, 1.16 mm, 0.52 mm, and 40.47%, respectively. The six forest types exhibited aggregate stability ranging from 71.61% to 78.20% for WR 1.97 mm to 2.61 mm for MWD, 0.93 mm to 1.27 mm for GMD. and 12.59% to 20.47% for PAD. Overall. DSL exhibited the poorest aggregate stability. followed by SF and TF, while PY. ACF, AD, and PA showed relatively lower stability. (3) At the macro scale, soil aggregate stability in the study area was significantly influenced by forest type, soil depth and their interaction (p<0.001). At the micro scale, it was mainly affected by soil bulk density, non-capillary porosity total potassium, soil organic matter sand content and clay content (p<0.05). Soil physicochemical properties, nutrients, and texture explained 90.5% of aggregate stability, with the greatest contribution coming from the interaction of physicochemical properties and nutrients, accounting for 61.3%. Soil texture often interacted with other factors to influence aggregate stability, with an independent explanatory power of only 5.1%. [Conclusion] In central Yunnan, the stability of soil aggregates can be significantly improved by returning farmland to forest. Future ecological restoration should focus on creating Pinus yunnanensis and Alnus cremastogyne forest, while avoiding high-intensity human activities. improving soil physical and chemical properties and increasing soil nutrient accumulation, and promoting the evolution of artificial pure forest into theropencedrymion forest and secondary forest. [ABSTRACT FROM AUTHOR]

[Objective] To study the effects of amino acids added in liquid culture medium on cordycepin content in the fermentation broth of Cordyceps militaris, and determine the optimal concentration of 8 kinds of amino acids added in liquid culture medium. [Method]The effects of 24 kinds of amino acids ( adding concentration 1 g / L) on cordycepin content were studied. DPS V18. 10 software was used for significant difference analysis. Adding L-lysine, L-cysteine, L-arginine, L-asparagine, L-glycine, L-alanine, L-serine, L-threonine, L-histidine and sarcosine had varying degrees of increasing effects on cordycepin content in the fermentation broth of Cordyceps militaris. 4 g / L L-glycine had the strongest promoting effect on cordycepin synthesis, and the cordycepin content in the fermentation broth was 1 022. 25 mg / L. [Conclusion] This study provides references for producing cordycepin by Cordyceps militaris liquid fermentation. [ABSTRACT FROM AUTHOR]

Heat stress refers to the systemic adaptive response, including non-specific thermal reactions and specific disorders, formed by animals being stimulated by a high heat environment beyond their own temperature regulation range. Ruminant animals are highly susceptible to heat stress due to their thick fur and high heat consumption during rumen fermentation, which seriously damages their health and production performance. The article summarizes the effects of heat stress on ruminant animals antioxidant and immune functions, as well as nutritional regulation measures for alleviate heat stress in ruminants animals in production and research in recent years, in order to provide reference for reducing the harm of heat stress to ruminants in production. [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.)

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Copyright of Journal of Data Acquisition & Processing / Shu Ju Cai Ji Yu Chu Li is the property of Editorial Department of Journal of Nanjing University of Aeronautics & Astronautics 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 Functional Materials / Gongneng Cailiao is the property of Chongqing Functional Materials Periodical Press 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 Cryptologic Research (2097-4116) is the property of Editorial Board of Journal of Cryptologic Research 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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Since the Xiaolangdi Reservoir (XLD) operation, bed materials coarsening and changes in flow resistance have been occurring substantially in the Lower Yellow River (LYR). Thus, to quantitatively describe the effects of XLD on flow resistance in the LYR, the varying characteristics of flow velocity, river width, bed material particle diameter and Manning′s coefficient were analyzed using measured data from the hydrological stations. A movable bed resistance formula incorporating the bedform index was developed based on control factor theory and measured bedform data. The accuracy of the formula was verified using 1 508 data sets measured at the hydrological stations. The results highlight that, first, the bed material is coarser in the upper reaches and finer in the lower reaches of LYR. More developed dunes and higher flow resistance occurred in the wandering reach. Second, in reaches downstream of Gaocun, the bed coarsening and flow resistance reduction are less pronounced than in the wandering reach. The cross-section of the main channel is narrower and deeper, increasing wall resistance obviously during flood periods. XLD operation has facilitated bedforms development and increased flow resistance in the LYR. [ABSTRACT FROM AUTHOR]

Copyright of World Regional Studies is the property of World Regional Studies 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.)

Taking Yunyan 87 in Qianjiang tobacco area of Chongqing as the research material, we selected 6 locations, preset time points to collect samples regularly, and constructed its matter accumulation model based on S-type logistic curve. The results showed that Yunyan 87 grew slowly within 36 days after transplanting, but grew rapidly from 36 to 53 days, and gradually stabilized after 73 days. The matter accumu- lation of Yunyan 87 showed the characteristics of ‘slow-fast-slow’, which was useful for further improving the tobacco growth and development model. [ABSTRACT FROM AUTHOR]

The spent fuel shearing machine is an important equipment at the head end of the power reactor spent fuel reprocessing. Condition monitoring and fault diagnosis play an important role in ensuring the safe operation of the spent fuel shear, avoiding major accidents, and reducing its maintenance time and cost. In view of the problems such as the lack of research on fault diagnosis of spent fuel shears in China, the difficulty of data acquisition, and the low accuracy of fault diagnosis, a residual network model based on Bayesian optimization and convolutional block attention module (CBAM) was constructed. First of all, the noise was reduced by using the dual-channel difference method, and it was converted into mel spectrograms. Secondly, CBAM was introduced to improve the residual network and improve the deep feature extraction ability of the network. Bayesian optimization algorithm was used to train the super parameters such as the optimizer, and the network model was retrained after the optimal super parameters were obtained. Finally, the experimental results show that the diagnostic accuracy of the model is 93. 67%, which is significantly improved compared with other methods. [ABSTRACT FROM AUTHOR]

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Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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 Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing 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.)