Search

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Pathophysiology is the property of Jinan University, School of Medicine 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 Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health 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 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.)

: Dynamic speed can often cause the fluctuations of unmanned agricultural machines in farmland slopes. Agricultural operations can be significantly impacted, such as seeding and fertilizer application. The stability of planting and the precision of fertilizer application can depend mainly on the driving speed of driverless tractors in undulating farmland. Particularly, the absence of visual cues from the driver can lead to inevitable pre-control of the throttle when tractors operating. In this study, the robust control system of steady speed was proposed using the Digital Elevation Model (DEM). An advanced feed-forward control was also utilized at the longitudinal slopes. A systematic investigation was then made to assess the influence of farmland slope on the tractor speed. The occurrence of slope acceleration was induced by gravity during both uphill and downhill maneuvers in the tractor driving. The new control of the tractor was also used to predict the terrain slope ahead. Consequently, the speed of the tractor was adjusted for the target speed, as the terrain slope increased. An extended duration was avoided to reach the preset velocity. Alternatively, the speed readily surpassed the target speed on the decreasing slopes, resulting in frequent braking and adverse effects on the dynamics of vehicles. DEM data was utilized to extract elevation information from the terrain. The longitudinal slope feed-forward control was also introduced to dynamically obtain the prescanning distance. The pre-scanning time was configured to integrate with the current driving speed. At the same time, the slope value of the subsequent driving path was calculated to determine the compensation of speed on the slope. Ultimately, effective control of the tractor's speed was achieved to adjust the target speed in real time. The optimal performance and stability were obtained across diverse terrain gradients. DF1204 CVT tractor was taken as a test platform. Three tests were conducted with different target speeds for uphill, flat, and downhill at the Yantai Research Institute of China Agricultural University. The test results showed that when the tractor was traveling at the target speeds of 4.0, 6.0, and 8.0 km/h, the mean values of the measured speeds were 4.03, 5.94, and 7.85 km/h for uphill driving, 4.04, 6.02, and 8.03 km/h for level driving, and 4.00, 6.10, and 8.19 km/h for downhill driving, respectively. The speeds closely approached the target values, indicating the efficacy of the control system to regulate the tractor speeds. The speed accuracy was also improved with the mean speeds of the experimental group notably closer to the target speeds for both uphill and downhill driving scenarios. Moreover, the root mean square errors (RMSE) were reduced under all driving conditions, with decreases of 46.63%, 21.92%, and 37.15% for uphill, level ground, and downhill driving, respectively, compared with the control group. The speed stability was enhanced to reduce the speed fluctuations, thereby improving the overall tractor performance and operational efficiency in agricultural settings. The feedforward control of longitudinal gradient speed also surpassed the original, in terms of the speed stability and path tracking. The steady speeds with high precision were maintained in the autonomous agricultural machinery under undulating farmland environments. The tractor efficiency was then promoted to reduce the operational fluctuations in practical agricultural operations. The optimal speeds can be used to realize smoother and more productive farming in the various tasks of streamlining, such as planting and fertilization. Moreover, the operational disruptions can be minimized to maintain high-performance standards. The finding can greatly contribute to the overall quality and reliability of agricultural machine operations. Technical support can also be offered to improve agricultural productivity and sustainability in sustainable production. [ABSTRACT FROM AUTHOR]

Copyright of Remote Sensing for Natural Resources is the property of Remote Sensing for Natural Resources 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 Soil & Water Conservation is the property of Bulletin of Soil & Water Conservation 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 Advances in Earth Science (1001-8166) is the property of Advances in Earth Science 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 Electric Power is the property of Electric Power 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.)

Objective To understand the current situation of nursing students′ attitudes and abilities in hospice care, and to provide reference for nursing colleges to set up hospice care courses. Methods A total of 665 nursing students from 30 hospitals were investigated by the convenience sampling method, using the Chinese version of Frommert′s Attitude toward Hospice Care B Scale（FATCOD-B scale） and the hospice care ability questionnaire for nursing students. Results The nursing students′ FATCOD-B scale scores were（99.38±12.68）,and their attitude was positive. The total score of hospice nursing ability of nursing students was（63.12±10.17）,and the ability level was average. Conclusion Nursing students have a positive attitude towards hospice care, and their hospice care ability is average. It is suggested to improve the hospice education system in China and strengthen hospice care education in college and universities. Expand the practice base of hospice care, increase the practice opportunities of hospice care for nursing students, and provide backup force for the development of hospice care. [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.)

Fruit detection is a popular key technology in agricultural automatic picking. Aiming at the problems of perishable grapes at maturity, different ripening conditions, complex background of grape orchards and changeable lighting conditions, a lightweight improved detection and recognition method based on YOLO v5s algorithm was proposed. Firstly, Efficientnet-v2 network was used as the backbone of feature extraction and integrated the no dimensionality reduction local cross-channel interaction mechanism, which greatly reduced the size of the model and the amount of parameters on the premise of ensuring the accuracy, and speeded up the model reasoning speed. Secondly, in order to further compensate for the accuracy loss caused by model simplification, coordinate attention mechanism was introduced at the key position of model feature fusion to strengthen the attention to the target, improved the model􀆳s ability to detect dense targets and resist complex background interference, and ensured the comprehensive performance and reliability of the algorithm. The experimental results show that the average accuracy of the improved algorithm is 98. 7%, the average detection speed is 0. 028 s, and the model size is only 12. 01 MB. Compared with the improved algorithm, the accuracy is increased by 0. 41%, the detection speed is increased by 22%, and the model is reduced by 13. 2%. In the orchard scene image detection test, the proposed algorithm can well detect the grape fruit and identify its status, and has strong adaptability to different environmental impacts, which provides a reference for the development of automatic picking technology. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Ecology & Rural Environment is the property of Journal of Ecology & Rural Environment 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 Coal Science & Technology (0253-2336) is the property of Coal 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 Chinese Journal of Geological Hazard & Control is the property of China Institute of Geological Environmental Monitoring (CIGEM) 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 Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui 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 long-term underestimate of cultivated land has posed serious challenges to sustainable development in China. Particularly, the cost of occupying cultivated land is relatively low to threaten the future national food and ecological security in urban expansion, although the government has implemented strict cultivated land protection policies (CLPP). Therefore, the spatial differentiation of multi-functional cultivated land can contribute to improving the CLPP during this time. This study aims to explore the differentiation law of multi-function value in the cultivated land using the remote sensing images and statistics Yearbook of Shijiazhuang City, Hebei Province, China, in 2018. The specific values were also calculated, including the production function in grid-scale farmland, ecological maintenance, and social security function. A gradient analysis was introduced to determine the value differentiation of three functional unit areas. A cascade ring and sampling were also taken to the city center as the origin, where the gradient analysis was conducted on the change of values. The results showed that: 1) There was a trend of "U"-decline in the functional value of cultivated land in the study area in 2018. The peak value was found in the fourth "U" -shaped trend of inverted land under the urban-rural integration. Specifically, the total value of the unit area was 2318 669 300 Yuan. It infers that the rapid urbanization made the urban community to be the center of education, medical care, and economy. The population gradually gathered to the radiation areas of the first and second rings in the city center, where the total value of one ring per unit area was the lowest at 1,0070,764,7 million Yuan. The functional value of 1-4 loop increased, whereas, that of 7-10 loop decreased significantly. Among them, the ecological maintenance function made the largest contribution rate to the total functional value of arable land, with more than 49%. The social security function accounted for about 30% of the total value. The material production function was the lowest value, representing about 19%. The data demonstrated that the non-productive function value in the cultivated land was much higher than that of the production function. 2) Cascade ring analysis found that the highest value appeared in Ring 1-4, namely 10-40km away from the city center. The material production function was found in the fourth ring, while that in the 6th-10 ring decreased significantly, where the unit output value of 463.5446 million yuan, and the peak of 122.413 million Yuan. The largest value of social security function was dominated by location factors, where the first area value of 847 2276 million Yuan. 3) Strip analysis was found that the functional value of cultivated land in the north and south belt presented an inverted U-type trend of "rising and decreasing", and the ecological maintenance function presented a symmetrical "M" -shape. The value of social security function in the east-west section changed significantly in the west, whereas, the value of ecological maintenance function changed dramatically in the eastern part of the study area. Consequently, the findings can provide scientific suggestions for the planned promotion of multi-functional land use and the optimal allocation of cultivated land resources. [ABSTRACT FROM AUTHOR]

Copyright of Nuclear Safety is the property of Nuclear & Radiation Safety Center 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 Shipin Kexue/ Food Science is the property of Food Science 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 China Brewing is the property of China Brewing 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.)

The construction of cross-sea passage mega projects is in the ascendant in China. The technical capability and equipment level are continually improving, but the cost management in these construction projects is not satisfactory, and the actual cost of the projects often exceeds the approved budget. Some problems need to be studied and discussed about the cost compilation in the early stage of project construction and cost control and interaction management in the construction phase. Through the investigation of the completed and on-going domestic cross-sea passage mega projects, we analyzed the cost indicators and cost overrun reasons in the cross-sea passage mega projects. From the aspect of design and construction, we put forward the critical factors of cost management control, interactive management and related suggestions for cross-sea passage mega projects, filled the gaps in the cost research of cross-sea passage in the industry practice, which provides a reference for decision-making and construction for domestic cross-sea passage mega projects in the future. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Zhengzhou University: Engineering Science is the property of Editorial Office of Journal of Zhengzhou University: Engineering 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 Shipin Kexue/ Food Science is the property of Food Science 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 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 Shipin Kexue/ Food Science is the property of Food Science 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 Natural Gas Geoscience is the property of Natural Gas Geoscience 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 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 Beijing University of Technology is the property of Journal of Beijing University of 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.)

Copyright of Journal of Central China Normal University is the property of Huazhong Normal University 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 Shandong Medical Journal is the property of Shandong Medical Health Newspapers 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.)

In order to scientifically calculate the feasible potential quality of cultivated land quality upgrade and improve the planning, design, and arrangement of land consolidation project, a new pre-evaluation method of promotion potential of arable land quality was proposed based on the natural grade and utilization grade index of agricultural land gradation. The existing evaluation methods of improving potential of arable land quality are generally based on the natural grade and utilization grade index, and to set the top grade of arable land in a specified region as the target value of promotion potential calculation. The principle of existing methods is to assume that the limiting factors of arable land quality could be reduced or improved by land consolidation project. However, this assumption is not verified. This might cause the overestimate or underestimate of the evaluation results. The method we proposed was based on improvable degree of sensitive factors of agricultural land gradation. By investigating and analyzing how well the relative techniques of land consolidation can improve the sensitive factors of agricultural land gradation, the difference value between realizable and actual natural grade can be accurately calculated. The utilization grade could be calculated based on the natural grade. The first step was to implement a targeted survey to determine the sensitive factors of agricultural land classification, such as the effective thickness of soil layer, degree of salinity, drainage condition, irrigation guarantee rate, irrigation water source, rock coverage of surface soil, and slope gradient. Afterwards, we analyzed the magnitude of the change of each sensitive factor improved by land consolidation project based on the gradation unit. The second step was to analyze the feasible natural quality grade promotion attributed to the most effective engineering measure for calculating the promotion situation of natural and utilized quality grades by upgrade potential models of natural and utilized grades. Finally, we converted results of the first two former steps into the feasible upgrade potentials of natural and utilized grades. Zhongjiang County of Sichuan Province was taken as a case study for our method. After analyzing the previous achievement of agricultural land gradation, the effective thickness of soil layer, slope gradient and rock coverage of surface soil, drainage condition and irrigation guarantee rate were determined as the sensitive factors of arable land quality. According to the adaptability of every sensitive factor, lifting scheme was enacted. Results showed that, both natural and utilized grade of 60 grading units in the studied area can be improved after the implementation of land consolidation project. The promotion ranges of provincial natural and utilized grades were 171.24 to 605.34 and 89.30 to 232.96, respectively. The provincial natural quality grade was promoted by an average of 0.66, and the provincial utilized grade was improved by an average of 0.63. After converting the provincial grade into national grade, the national natural quality grade was improved by an average of 0.84, and the national utilized grade was improved by an average of 0.62. The pre-evaluation method we proposed was adapted to the local situation of consolidation, with which pertinence focus on the cultivated land quality upgrade was obviously after the implementation of land consolidation projects, and was conformed to the practical situation of local land consolidation project. Research results could provide references for the future planning and design land consolidation project and the promotion of cultivated land quality. [ABSTRACT FROM AUTHOR]

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers 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 To construct and identify the recombinant plasmid pmCherry-C1-Argonaute1 and to provide the basis for further research on the biological role of Argonaute1 protein in the field of cell stress and its related diseases. Methods The total RNA was extracted from Hela cells and c DNA containing Argonaute1 was inverse transcribed. Argonaute1 fragment containing EcoRI and Bam HI site was amplified by PCR from purified tamplate from He La cell line and inserted into pmCherry-C1 fluorescent expressing vector. The recombinant pmCherry-C1-Argonaute1 plasmid was transfected into He La cells and the expression of red fluorescent fusion proteins was examined by Western blotting and the co-localization in stress condition of Argonaute1 and G3BP( biomarker in stress granules) and DCP1α ( biomarker in processing bodies) was detected by fluorescence microscope. Results The recombinant plasmid was sequenced correctly which was identified by EcoRI,Bam HI,the restriction single / double enzyme digestion and gene sequencing. The red fluorescent fusion protein was also detected in transfected He La cell by Western blotting. The result of three-color immunofluorescence co-localization indicated that Cherry-red labeled Argonaute1 was co-localized with G3 BP and DCP1α in cells under stress condition. Conclusions The recombinant eukaryotic plasmid of pmCherry-C1-Argonaute1 is constructed successfully and expresses Cherry-red labeled Argonaute1 fusion protein effectively. These results will help to study the biological role of Argonaute1 in cell stress and related diseases. [ABSTRACT FROM AUTHOR]