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针对提出的可恢复功能的装配式预应力钢框架结构体系,依据已完成的梁柱节点、框架试验和整体结构的分析结果,结合我国现行建筑抗震设计规范,提出了腹板摩擦耗能的可恢复功能的装配式预应力钢框架"多遇地震无开口、无损伤,设防地震开口耗能且主体结构无损伤、罕遇地震主体结构损伤较小且仍能正常使用"的性能化设计目标,同时提出了性能化设计准则和设计流程,并通过设计算例验证了该方法的可行性,证明了提出的装配式预应力钢框架的结构响应估算方法具有一定的可靠性。

Copyright of Journal of Shenyang Ligong University is the property of Journal of Shenyang Ligong University 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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Taking the cultivated land in Hanjiang District, Yangzhou City as the research object, based on the analysis of the current situation of cultivated land quantity and quality, the land use dynamic change analysis method was used to analyze the spatial-temporal changes of cultivated land quantity and quality, and the grey correlation method was used to analyze the driving factors of cultivated land quantity changes. The results showed that during the research period, the area of cultivated land had been reduced, and dynamic degree was small. Affected by the rapid development of urban and the adjustment of agricultural structure, the reduced cultivated land was mainly converted into construction land and forest. New cultivation land mainly came from projects such as increasing or decreased urban and rural land, replenishment of cultivated land, comprehensive land remediation, etc, quality of cultivated land was higher. Urbanization rate, total population, second and tertiary industries occupy regional GDP, GDP, total grain output and sowing area of grain crops were the main driving factors affecting changes in the number of arable land. [ABSTRACT FROM AUTHOR]

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The path tracking control and the anti-rollover control were respectively constructed based on the kinematic model of sprayer. In the upper layer, the model predictive control (MPC) was used to output the desired steering angle and speed of the sprayer based on the current state of the sprayer and the desired path to achieve trajectory tracking control. The lower layer controller was used to determine whether the vehicle state produced rollover by introducing lateral load transfer rate (LTR) as rollover measure index, and the LTR was controlled by introducing a fuzzy controller to achieve the control of lateral acceleration and stabilize the LTR at a certain threshold value. The sprayer was controlled with better control accuracy and driving stability in the process of trajectory tracking and was ensured without rollover. The joint simulation results of ADAMS/MATLAB show that by anti-rollover control, the LTR of the sprayer can be controlled within 0.5 under complex road conditions with high trajectory tracking accuracy and improved safety. [ABSTRACT FROM AUTHOR]

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To analyze the risk factors of upper gastrointestinal bleeding (UGIB) in patients with cirrhosis portal hypertension (CPH), and to explore the predictive efficacy of red blood cell distribution width to lymphocyte ratio (RLR), total bile acid (TBA) and prothrombin time (PT). 150 patients with CPH who were admitted to our hospital from May 2019 to April 2022 were selected, and they were divided into UGIB group with 57 cases and non-UGIB group with 93 cases according to whether they were complicated with UGIB. Multivariate Logistic regression was used to analyze the risk factors for UGIB in patients with CPH, and receiver operating characteristic (ROC) curve was used to analyze the predictive efficacy of RLR, TBA and PT for UGIB in patients with CPH. There were statistically significant differences in proportion of drinking history, Child-Pugh grade, portal vein diameter, degree of esophageal varices, Hb, albumin, RDW and LC between two groups ( P＜ 0.05). RLR and TBA in UGIB group were higher than those in non-UGIB group, and PT was longer than that in non-UGIB group ( P＜ 0.05). Multivariate Logistic regression analysis showed that drinking history, Child-Pugh grade C, increased portal vein diameter, severe esophageal varicos, increased RLR, increased TBA, increased PT were the independent risk factors for UGIB in patients with CPH, and increased Hb as independent protective factors (P＜ 0.05). ROC curve analysis showed that the area under curve (AUC) of RLR, TBA and PT alone and in combination for predicting UGIB in patients with CPH were 0.804, 0.779, 0.786 and 0.920 respectively, and the sensitivities were 63.16%, 70.18%, 59.65% and 77.19%, respectively. The specificity was 94.62%, 80.65%, 88.17% and 96.77%, respectively. The AUC of patients with CPH complicated with UGIB predicted by RLR, TBA and PT combined was greater than that predicted by RLR, TBA and PT alone (P ＜ 0.05). Alcohol consumption, Child-Pugh grade C, increased portal vein diameter, severe esophageal varicos, increased RLR, increased TBA, increased PT are the risk factors for UGIB in patients with CPH, and increased Hb as a protective factors. The RLR, TBA and PT combined predict UGIB in patients with CPH with high efficacy. [ABSTRACT FROM AUTHOR]

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