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介电特性是决定雷达波在物质中传播速度的重要参数. 嫦娥四号测月雷达提供的高垂向分辨率次表层雷达剖面信息有助于加深对月球次表层物质介电特性的理解与认识. 全波形反演法充分利用雷达波场的运动学和动力学信息, 根据雷达波模拟结果与真实数据的差异计算更新参数, 迭代初始介电模型实现对次表层介电剖面的反演. 本文结合嫦娥四号测月雷达数据与时域有限差分方法下均质模型和随机等效介质模型的雷达回波特性, 确定随机等效介质模型能够更好地模拟嫦娥四号着陆区次表层物质的介电特性. 全波形方法反演的介电模型与真实模型在大部分区域的相对介电常数误差小于0.2, 为反演月壤厚度及构建次表层温度模型提供了重要的数据支撑.

Copyright of Foundry Technology (1000-8365) is the property of Foundry 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 Chinese Journal of Liquid Crystal & Displays is the property of Chinese Journal of Liquid Crystal & Displays 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 Synthetic Fiber Industry is the property of Sinopec Baling Petrochemical 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 Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica 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 Zhejiang Electric Power is the property of Zhejiang 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.)

Based on panel data from 11 provinces (cities) in the Yangtze River Economic Belt from 2011 to 2021, an evaluation index system for digital transformation and high-quality agricultural development was constructed using the entropy method. A bidirectional fixed effect model was used to empirically test the impact of digital transformation on high-quality agricultural development in the Yangtze River Economic Belt, as well as regional heterogeneity and indicator heterogeneity. The research results indicate that digital transformation can drive the high-quality development of agriculture in the Yangtze River Economic Belt, which has passed the robustness test;the impact of digital transformation on the high-quality development of agriculture in different regions of the Yangtze River Economic Belt is heterogeneous. The promotion of high-quality agricultural development in downstream areas is the strongest, followed by the middle reaches, and weaker in upstream areas. After testing the heterogeneity of indicators, it was found that digital transformation has the strongest promoting effect on the sharing of high-quality agricultural development in the Yangtze River Economic Belt, followed by innovation, coordination, and green, and has no significant impact on openness. Based on this, countermeasures and suggestions are proposed to strengthen the foundation engineering of digital technology, cultivate talents for agricultural digital application, strengthen the coordinated development of digital regions, and promote high-quality agricultural development. [ABSTRACT FROM AUTHOR]

To study the evolution and driving mechanism of production-living-ecological spatial pattern and set up different simulation scenarios is conducive to realizing coordinated and sustainable regional development of urban agglomeration. Based on the land use data in 2000, 2010 and 2020 of Chengdu-Chongqing urban agglomeration, production-living-ecological space was divided. According to land use data in 2010 and driving factors such as natural environment, social economy and traffic location, FLUS model was used to simulate the production-living-ecological spatial pattern in 2020. The Kappa coefficient was 0.824. Based on this model factor, the distribution pattern of production-living-ecological spatial pattern in 2030 is predicted and compared with three single scenarios. The results showed that: (1) From 2000 to 2020, production space decreased by 1375.95 km², living space increased by 2087.48 km², and ecological space decreased by 736.8 km² . The center of gravity of production space and living space moved to the southeast in general, while the center of gravity of ecological space moved to the northwest in general. (2) Compared with the actual situation in 2020, it is predicted that the production space will increase by 1749.57 km² in 2030, while the living space and ecological space will decrease by 58.9 km² and 1685.37 km² respectively, which is in line with the rapid development trend of urban and rural living land in the future. (3) Compared with the single spatial optimization scenarios, the comprehensive prediction of production-living-ecological space in 2030 is more consistent with the future development trend, and compared with the actual utilization of production-living-ecological space in 2020, urban and rural living land continues to grow, and the urbanization process maintains high-quality development. The research results can provide multi-dimensional and multi-angle reference for the future territorial space planning of Chengdu-Chongqing urban agglomeration and the symbiotic coordination of production-living-ecological space in the future. [ABSTRACT FROM AUTHOR]

[Objectives] This paper aimed to explore the quality traits of ‘Chardonnay' and ‘Viognier', two winemaking white grape varieties in Rushan area, in order to provide certain theoretical basis for the utilization, introduction and promotion of white winemaking varieties. [Methods] ‘Chardonnay' and ‘Viognier' were used as the test materials, and the quality traits of fruits were analyzed in the veraison stage and maturity stage, and the transcriptome sequencing was performed on the fruits in the veraison stage and maturity stage. [Results]At the maturity stage, ‘Viognier' was higher in grain weight, transverse diameter, longitudinal diameter, total phenolic content, soluble sugar content and total soluble solids (TSS) content, and ‘Chardonnay' was higher in total organic acid content. From the veraison stage to maturity stage, the soluble sugar, TSS and total phenol contents in ‘Viognier' changed more rapidly than ‘Chardonnay'. Among the sugar fractions, fructose and glucose content changed more rapidly, while other traits showed similar changes. The results of transcriptome analysis showed that the number of differentially expressed genes (DEG) was higher in ‘Viognier' than in ‘Chardonnay' from the veraison stage to maturity stage. Both differentially expressed genes were most distributed on chromosome 18 and least distributed on chromosome 15. In addition, the metabolic pathways of genes related to glycolate metabolism were screened by GO functional analysis and KEGG metabolic pathway analysis of differentially expressed genes. [Conclusions] There were differences in fruit quality between two white grape varieties in different periods, mainly in terms of total organic acid content, soluble sugar content, TSS content, total phenol contents and transverse and longitudinal diameter of the fruit. From the veraison stage to maturity stage, the development of fruit traits in ‘Viognier' was faster than that of ‘Chardonnay'. The differences in the expression levels of related genes in the glycolic acid anabolic pathway between two varieties might be the reason for the differences in fruit quality traits between two white grape varieties. [ABSTRACT FROM AUTHOR]

Objective To investigate the efficacy of oral Danning tablets for bowel preparation for colonoscopy in diabetes mellitus patients. Methods A study was conducted from November 2022 to May 2024, 100 type 2 diabetic patients (aged≥30 years) admitted to endocrinology department in our hospital were selected and scheduled for colonoscopy as research subjects. These patients were randomly divided into two groups: ① A control group (n=50), received 68.56 g of polyethylene glycol electrolyte powder 10 hours before the colonoscopy and an additional 137.12 g six hours before the procedure. ② An experimental group (n=50), in addition to the bowel preparation regimen of the control group, orally took Danning tablets three times daily, five tablets each time, starting two days before the colonoscopy. Results The experimental group had a BBPS score of (7.44±1.03), which was higher than the control group’s BBPS score of (5.58±1.98), P<0.001. In the experimental group, 96% of the bowel preparations were rated as excellent or good (BBPS score≥6), significantly higher than the 58% in the control group (P<0.001). Conclusion In diabetic patients undergoing colonoscopy, oral administration of Danning tablets during bowel preparation could improve bowel cleanliness and significantly enhance the quality of bowel preparation. [ABSTRACT FROM AUTHOR]

Cardiac CT, or coronary CT, is a medical imaging technique that involves injecting iodine contrast agents into blood vessels to visualize the heart's coronary arteries. Cardiovascular specialists utilize these images to diagnose coronary artery blockages and assess blood flow velocity. Prior to the examination, patients are required to maintain a stable heart rate, typically not exceeding 60 beats per minute. Medications such as β-receptor blockers and nitroglycerin may be administered to reduce heart rate if necessary. This technology offers rapid imaging, minimal side effects, and low rates of false negatives and false positives. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Ground Improvement is the property of Journal of Ground Improvement 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 Diamond & Abrasives Engineering is the property of Zhengzhou Research Institute for Abrasives & Grinding 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 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 Evaluation & Analysis of Drug-Use in Hospitals of China is the property of Evaluation & Analysis of Drug-Use in Hospitals of China Editorial Board 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 Urban Mass Transit is the property of Urban Mass Transit 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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Objective To explore the systematic construction and application of accurate follow-up ( model based on behavior change wheel model (BCW) in peritoneal dialysis (PD) patient management. Methods Under the guidance of BCW theory, the accurate follow-up model of regional groups of the PD patients was established, and questionnaires were conducted before and after the follow-up with coping efficacy questionnaire(CEQ), social support rating scale (SSRS) and client satisfaction questionnaire-8(CSQ-8). Results After 1,3 and 6 months follow-up, the coping efficacy scores were significantly different from those before implementation(P<0.05). After 1.3 and 6 months of follow-up, the social support score was significantly different from that before implementation (P<0.05). The satisfaction of the patients after six months follow-up was higher than that before implementation, and the difference was statistically significant (P<0.05). Conclusion The regional group accurate follow-up model of peritoneal dialysis patients based on BCW theory is suitable for local peritoneal dialysis patients, and the follow-up effect is ideal, so it can be promoted and used in the local region. [ABSTRACT FROM AUTHOR]

Self-drilling anchor is a new type of anchor integrating drilling, grouting and anchoring functions, which can overcome the problems of easy collapse holes and low construction efficiency of pebble gravel formation, and has the advantages of high construction efficiency and good comprehensive economic benefits, and has broad engineering application prospects. Based on the combination of on-site pull-out test and ABAQUS numerical simulation at a gravel site in Luoyang, the anchoring characteristics and load transfer laws of self-drilling anchor in gravel stratum were discussed. The results show that the self-drilling anchor has excellent anchoring performance in gravel stratum, which can meet the engineering requirements. The average bonding strength at the anchorage body-soil interface gradually decreases with the increase of anchor length. The axial stress, shear stress and anchorage body shaft stress are distributed exponentially along the anchoring depth. With the increase of anchor depth, the shear stress of anchorage body first rises rapidly and then gradually decreases, and the peak shear stress increases with the increase of load, but the peak point position remains basically unchanges. With the increase of drawing load, the radial influence range of the anchor on the surrounding soil stress increases, while the depth direction influence range remains around a certain value. [ABSTRACT FROM AUTHOR]

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.)

To clarify the mechanism of the influence of tip clearance on the performance of centrifugal compressors, numerical simulation methods were used to study the effects of leakage vortices and flow losses at the centrifugal compressors under different tip clearances. Firstly, the reliability of the simulation was verified by comparing the experimental results with the numerical calculation results. Then, the changing trends of isentropic efficiency and pressure ratio of the compressor under different tip clearances were analyzed. Finally, the internal flow characteristics were analyzed, and under different clearances, the changes in the vortex structure inside the impeller, the distribution of leakage flow streamlines, and the entropy change law along the flow direction were elaborated. The mechanism of different tip clearances effect on compressor performance was investigated. The research results indicate that when the tip clearance ratio increases from 0.018 to 0.054, the maximum changes in efficiency decrease across the entire operating range are 0.7%, 0.6%, 0.4%, and 0.2% respectively. The overall decrease in pressure ratio remains around 0.3% . The tip leakage flow is mixed with the mainstream to form tip leakage vortices and tip separation vortices, among which tip leakage vortices are the main source of loss. As the tip clearance ratio increases, the flow loss within the 20% flow direction range near the leading edge of the blade changes less, while the loss increases within the 40% range near the trailing edge of the blade. The increase in the tip clearance ratio leads to an increase in the size of the leakage vortex, thereby reducing the effective flow area, which is the main reason for the performance degradation of the compressor. [ABSTRACT FROM AUTHOR]

OBJECTIVE: To construct the comprehensive evaluation index system of rivaroxaban for clinical comprehensive evaluation of rivaroxaban and warfarin in the treatment of nonvalvular atrial fibrillation, so as to provide evidence-based evidence for health policy formulation and clinical rational drug use. METHODS: The Delphi and Analytic Hierarchy Process were used to establish a comprehensive evaluation index system and determine the weights of each indicator. Relevant evidence data were collected through clinical observation studies, Meta-analysis, questionnaires, drug instructions, guideline consensus and official website, the experts scored rivaroxaban and warfarin in the treatment of nonvalvular atrial fibrillation according to the evidence data of safety, effectiveness, economy, suitability, accessibility and innovation. Final score of the indicator was obtained by combining the weight of the indicator and the expert score. The total score of rivaroxaban and warfarin were added together, and the total score of the two was compared. RESULTS: The constructed comprehensive evaluation system of rivaroxaban included 6 firstlevel indicators and 21 second-level indicators; the comprehensive evaluation score of rivaroxaban was 85. 12 points, and the comprehensive evaluation score of warfarin was 71. 45 points. CONCLUSIONS: The clinical comprehensive value of rivaroxaban is higher than that of warfarin in the treatment of nonvalvular atrial fibrillation, which can provide reference basis for national medical insurance policies and rational clinical medication. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She 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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【Objective】It is to establish a rapid, sensitive and specific SYBR Green I quantitative PCR method for the detection of sugarcane striate virus（SStrV）.【Method】A specific amplification primer was designed from the conserved sequence of the SStrV genome sequence, the recombinant plasmid pMD19-T-SStrV-qN containing SStrV gene was constructed as a positive plasmid standard. Using it as template, the SStrV fluorescence quantitative PCR assay was established. And the sensitivity, specificity, stability, and subsequently of this method were tested, then the SStrV loads in different tissue sites of sugarcane were detected.【Result】The recombinant plasmid containing SStrV genome sequence was diluted into a standard at a 10-fold ratio, and they were used as a template for real-time PCR, the standard curve y = -3.337 x + 38.197 was obtained, and the correlation coefficient r² = 0.999 was obtained, indicating that the Cq value was linearly related to the logarithm of the copy number of the standard concentration. With this established real-time PCR, the least detection limit was 13 copies of the recombinant plasmid/μL, which was 100 times more sensitive than ordinary PCR. The method specifically detected SStrV with high specificity, and the coefficient of variation within and between groups was n 0.13%-0.94%, indicating that the method was of good repeatability. The load of SStrV was significantly different among different tissue sites of the sugarcane, and the load of SStrV was the highest in +4 leaves, which was significantly different from other tissue sites.【Conclusion】The SYBR Green I quantitative PCR method is established to provide an efficient quantitative detection method for the diagnosis of SStrV, and it is determined that +4 leaves are the best sampling site for the detection of SStrV in sugarcane. [ABSTRACT FROM AUTHOR]

The preparation, thermal stability and shielding properties of boron carbide/lead/polyethylene composites were studied. Boron carbide/lead/polyethylene composites with mass fraction of 3%, 4%, 5% and 6% boron carbide and different thicknesses were prepared, and the related properties of the composites were evaluated. The results show that when different samples are at the same thickness, adding 6% boron carbide composite has better high-temperature basic properties. Thermogravimetric test shows that the mass loss of the sample is low and its basic properties are effectively maintained. In addition, the composite with 6% boron carbide has the best application effect and better particle shielding performance. The results provide a reliable basis for the preparation and performance evaluation of boron carbide lead polyethylene composites. [ABSTRACT FROM AUTHOR]

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Copyright of Engineering Science Research & Application is the property of Omniscient Pte. Ltd. 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.)