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安装偏差对胶合木梁柱植筋节点受弯承载力的影响

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土木与环境工程学报（中英文） 2024年第2期46卷 138-145页

作者：唐秋霞李军郭峰旭解选本王燕青岛理工大学土木工程学院山东青岛266033 重庆长厦安基建筑设计有限公司青岛分公司山东青岛266061 青岛市即墨区古城发展服务中心山东青岛266200

胶合木植筋节点在加工和安装时通常会存在些许缺陷和误差,且植筋节点的设计和施工目前尚无标准可循。为了研究含加工缺陷在内的安装偏差对该类节点受弯承载力的影响,明确安装偏差的允许范围,基于理论计算方法初步校核所设计节点的梁端... 详细信息

胶合木植筋节点在加工和安装时通常会存在些许缺陷和误差,且植筋节点的设计和施工目前尚无标准可循。为了研究含加工缺陷在内的安装偏差对该类节点受弯承载力的影响,明确安装偏差的允许范围,基于理论计算方法初步校核所设计节点的梁端抗弯承载力,然后进行有、无安装偏差节点的有限元分析,并与有安装偏差的试验结果进行对比,运用考虑胶层开裂的有限元分析方法确定安装偏差限值。结果表明:有安装偏差节点的梁端抗弯承载力有所下降;试验中试件的破坏形态主要为植入钢筋屈服、植筋孔洞周围木材破坏及木柱顺纹方向开裂;有限元分析时考虑安装偏差和胶层开裂,则分析结果与试验吻合度较高;相对于通常预留间隙10 mm的节点模型,安装偏差控制在10~25 mm以内时,受弯承载力的降低幅度低于5%。

关键词：胶合木结构植筋节点梁柱节点循环反复荷载安装偏差

非药物康复干预对乳腺癌患者化疗相关认知障碍影响的网状Meta分析

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广州医科大学学报 2024年第1期52卷 12-20页

作者：李丰旭柳陆兰州大学第一医院放疗科兰州730000 兰州大学第一医院运营管理部兰州730000

目的:评价非药物康复干预措施对乳腺癌患者化疗相关认知障碍的治疗效果。方法:检索Pubmed,Cochrane library,Embase,Web of science,中国知网,万方,维普,CBM数据库符合研究目的的随机对照试验,检索时限截止到2022年2月,应用Stata 16.0... 详细信息

目的:评价非药物康复干预措施对乳腺癌患者化疗相关认知障碍的治疗效果。方法:检索Pubmed,Cochrane library,Embase,Web of science,中国知网,万方,维普,CBM数据库符合研究目的的随机对照试验,检索时限截止到2022年2月,应用Stata 16.0软件进行网状Meta分析。结果:纳入研究22项,共10种非药物干预方法,并且纳入的研究均未报告显著不良事件,表明这10种非药物干预措施对于治疗化疗相关认知障碍是安全的。网状结果显示,相比于常规护理,最有效的干预措施排序为正念疗法、认知训练。结论:非药物康复干预对乳腺癌化疗相关认知障碍的治疗安全有效,其中正念疗法和认知训练的干预效果可能最佳,这一结果为临床决策提供了循证数据支持,未来需进行更多高质量研究探索最佳性价比的干预措施。

关键词：非药物干预乳腺癌化疗相关认知功能障碍网状Meta分析

CcpA mutants infuence selective carbon source utilization by changing interactions with target genes in Bacillus licheniformis

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Systems Microbiology and Biomanufacturing 2022年第1期2卷 193-207页

作者： Yupeng Zhang Youran li fengxu Xiao Hanrong Wang liang Zhang Zhongyang Ding Sha Xu Zhenghua Gu Guiyang Shi Key Laboratory of Industrial Biotechnology Ministry of EducationSchool of BiotechnologyJiangnan UniversityWuxi 214122People’s Republic of China National Engineering Laboratory for Cereal Fermentation Technology Jiangnan University1800 Lihu AvenueWuxiJiangsu Province 214122People’s Republic of China Jiangsu Provincial Research Center for Bioactive Product Processing Technology Jiangnan UniversityWuxiPeople’s Republic of China

The gram-positive bacterium Bacillus licheniformis exhibits obvious selective utilization on carbon sources.This process is mainly governed by the global regulator catabolite control protein A(CcpA),which can recognize and bind to multiple target genes that are widely distributed in metabolic pathways.Although the DNA-binding domain of CcpA has been predicted,the infuence of key amino acids on target gene recognition and binding has yet to be uncovered.In this study,the impact of Lys31,Ile42 and Leu56 on in vitro protein–DNA interactions and in vivo carbon source selective utilization was investigated.The results showed that alanine substitution of Lys31 and Ile42,located within the 3rd helices of the DNAbinding domain,signifcantly weakened the binding strength between CcpA and target genes.These mutations also lead to alleviated repression of xylose utilization in the presence of glucose.On the other hand,the Leu56Arg mutant in the 4th helices exhibited enhanced binding afnity compared with that of the wild-type one.When this mutant was used to replace the native one in B.licheniformis cells,the selective utilization of glucose over xylose increased.This study provides a new strategy for understanding the relationship between the function and structure of regulatory proteins.This study also used a new strategy was used to regulate carbon source utilization beyond CCR engineering.

关键词： CcpA Bacillus licheniformis Mutagenesis Xylose utilization

心房颤动与窦性心律的风湿性心脏瓣膜病病人左心耳长链非编码RNA表达差异研究

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中西医结合心脑血管病杂志 2024年第11期22卷 1941-1950页

作者：谭宏伟李劲平熊琪聂永梅廖斌于风旭西南医科大学附属医院四川泸州646000 四川绵阳四〇四医院西南医科大学-四川省心血管疾病协同创新中心四川泸州646000

目的:探讨风湿性心脏瓣膜病合并慢性心房颤动或窦性心律病人左心耳长链非编码RNA(lncRNAs)的表达差异。方法:选取风湿性心脏瓣膜病心房颤动病人和风湿性心脏病窦性心律病人各3例,术中取少许左心耳组织,通过高通量二代测序、基因本体(GO... 详细信息

目的:探讨风湿性心脏瓣膜病合并慢性心房颤动或窦性心律病人左心耳长链非编码RNA(lncRNAs)的表达差异。方法:选取风湿性心脏瓣膜病心房颤动病人和风湿性心脏病窦性心律病人各3例,术中取少许左心耳组织,通过高通量二代测序、基因本体(GO)富集分析、京都基因和基因组百科全书(KEGG)通路显著性富集分析对lncRNAs靶基因进行生物功能分析,反向推测lncRNAs功能。结果:心房颤动组和窦性心律组比较存在差异lncRNAs共38条(P<0.05),表达上调15条,表达下调23条,心房颤动组较窦性心律组有显著性差异的mRNAs有1475条(P<0.05),表达上调635条,表达下调840条。结论:风湿性心脏瓣膜病病人左心耳中与心房颤动相关的差异表达的lncRNAs可能与心房颤动电重构、钙处理异常机制有关,且可能与代谢途径、心肌收缩、心肌细胞肾上腺素能信号传导、丝裂原活化蛋白激酶(MAPK)信号通路、环磷酸鸟苷(cGMP)-蛋白激酶G(PKG)信号通路、钙信号通路相关。

关键词：心房颤动风湿性心脏瓣膜病窦性心律长链非编码RNA 左心耳

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Research on control algorithm of intelligent valve positioner based on parameter self-tuning

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Research on control algorithm of intelligent valve positione...

Features Selection for Skin Micro-Image Symptomatic Recognition

第三十九届中国控制会议

作者： Qian Cheng Zhifeng liu Aipeng Jiang Enhui Jiang Yangjian Xiao fengxu li Jiaji Jiang School of Automation Hangzhou Dianzi University

Pneumatic valve positioner is widely used in chemical industry, energy, oil and gas, water treatment, paper industry and other industrial fields. The type of foreign valve positioner has been transferred from mechanical and electronic to intelligent electronic. However, the domestic research on valve positioner research started late, the technology is relatively backward, the failure rate is high. The main reason that affects the performance of domestic valve positioners is due to the immature control algorithm. Based on the analysis of the traditional five-step switch control algorithm, an improved control algorithm and a new parameter auto-tuning method are proposed. All control parameters in the improved control algorithm are obtained by self-tuning, which improves the universality of the algorithm. The parameter self-tuning method can automatically identify the stroke type, end position, maximum overshoot, optimal PWM duty ratio of different valve positions and other parameters, which provides the basis for the control parameter selection of the improved control algorithm. The control algorithm was implemented and verified with the help of an experimental bench. The experimental results show that the improved control algorithm not only greatly reduces the valve position adjustment time, but also avoids the overshoot phenomenon in the whole stroke range.

关键词： Intelligent valve positioner Five step switch control algorithm Parameter self-tuning optimal PWM overshoot

来源： cnki会议评论

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上海大学学报（自然科学版） 2004年第B10期10卷 123-128页

作者： HUYue-li CAOJia-lin ZHAOQian fengxu SchoolofMechatronicalEngineeringandAutomation ShanghaiUniversityShanghai200072China

Automatic recognition of skin micro-image symptom is important in skin diagnosis and treatment. Feature selection is to improve the classification performance of skin micro-image symptom.This paper proposes a hybrid approach based on the support vector machine (SVM) technique and genetic algorithm (GA) to select an optimum feature subset from the feature group extracted from the skin micro-images. An adaptive GA is introduced for maintaining the convergence rate. With the proposed method, the average cross validation accuracy is increased from 88.25% using all features to 96.92% using only selected features provided by a classifier for classification of 5 classes of skin symptoms. The experimental results are satisfactory.

关键词：皮肤诊断微图像症状识别皮肤治疗矢量设计遗传算法图像处理

柠檬酸对NiMoP/Al_(2)O_(3)-USY催化剂活性影响

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石油化工高等学校学报 2022年第1期35卷 35-40页

作者：李凤绪王成林尚增辉李宪昭中国石油工程建设有限公司华北分公司河北任丘062552

以Ni、Mo为活性组分,Al_(2)O_(3)-USY为载体,通过向NiMoP浸渍液中添加柠檬酸,考察柠檬酸对催化剂催化活性的影响。对催化剂进行表征,结果表明随着浸渍液中柠檬酸浓度增大,催化剂表面总酸量呈先增加后减小的趋势,当n_(L)/n_(Ni)=1.0时,... 详细信息

以Ni、Mo为活性组分,Al_(2)O_(3)-USY为载体,通过向NiMoP浸渍液中添加柠檬酸,考察柠檬酸对催化剂催化活性的影响。对催化剂进行表征,结果表明随着浸渍液中柠檬酸浓度增大,催化剂表面总酸量呈先增加后减小的趋势,当n_(L)/n_(Ni)=1.0时,催化剂表面酸量最大;催化剂活性相MoS_(2)堆积层数逐渐增加,平均片层长度逐渐增大。340℃实验条件下,当n_(L)/n_(Ni)=1.0时,催化剂的催化活性最好,脱硫率和脱氮率分别为99.6%、99.7%,优于未添加柠檬酸的催化剂。

关键词：柠檬酸活性相酸量催化活性

Mechanism of spatial emplacement of Shanhou gold ore body in Laixi of Shandong and its prospecting significance

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Global Geology 2016年第3期19卷 144-152页

作者： liU fengxu WANG li WANG Dunrong XU Jingge CUI Zhiyong College of Earth Sciences Jilin University Geological Bureau of Nuclear Industry Jilin Province Shandong Gold Mining ( Lacey) Co. LTD

Through analysis of geological characteristics of the gold deposit,the shape,occurrence,and spatial distribution of ore-controlling fault plane in the Shanhou mining area were investigated,and the regularities of enrichment and emplacement of ore body were summarized. The analysis shows that the Shanhou gold deposit was controlled by NE-NNE Zhaoping fault zone; the fault gouge developed in fault zone provides a barrier to ore-bearing hydrothermal solution,and the industrial ore body is all distributed within 40 m of footwall of main fault plane. The industrial ore body is mainly enriched in the NE positions of fault where the deep dips changed to flat dips,and shows the obvious regularity of NE lateral trending with angle around 75°. The stress analysis of fault in mineralization epoch showed that the ore-controlling structure presented the characteristics of righthanded rotation inverse-fault activity in mineralization epoch,and the host space tended to occur in NE regional tension positions where the dips become flat in the strike of fault,causing emplacement of ore body. It is thought by combining equal interval distribution of deposit with spatial variation of industrial ore body and orecontrolling fault structure that the Shanhou gold deposit recurred in regularity and the non-ore interval occurred in the ore body. Meanwhile,it is predicted that the favorable target area of prospecting lies in the areas of deep main fault plane with NE strike( > 30°) and the deep dips changing to flat dips in the Shanhou mining area,and the prospecting should be emphasized. The favorable deep mineralization prospect exists in middle Beibo mining area,where is the key area for future prospecting.

关键词：找矿意义空间分布金矿体定位机制招平断裂带山东金矿地质特征工业矿体

生态系统恢复工程对康平地区生态系统格局的影响

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水土保持学报 2022年第1期36卷 95-100,109页

作者：李虹朱洪波王钟书宁新元王烽旭沈阳大学师范学院沈阳110000 辽宁工程技术大学测绘与地理科学学院辽宁阜新123000 中国地质大学(北京)地球科学与资源学院北京100000 盘锦华发国际学校辽宁盘锦124000

为了对自1999年起辽宁省沈阳市康平县实施的生态系统恢复工程的成效进行评估,利用多期Landsat影像解译了康平地区陆表生态系统时空分布特征;利用气候要素回归分析、生态系统转移矩阵以及生态系统综合人类扰动指数等研究方法,对康平地区... 详细信息

为了对自1999年起辽宁省沈阳市康平县实施的生态系统恢复工程的成效进行评估,利用多期Landsat影像解译了康平地区陆表生态系统时空分布特征;利用气候要素回归分析、生态系统转移矩阵以及生态系统综合人类扰动指数等研究方法,对康平地区自1984年以来的陆表生态系统格局进行了研究,特别是对生态系统恢复工程实施20年来的生态系统时空变化规律进行了探索,并分析了其演变的驱动力机制。结果表明:(1)1999—2020年康平地区的生态系统格局发生显著变化,主要表现为沙地面积占比减少35.391%,耕地面积占比减少6.240%,林地面积大幅增加。(2)通过对气候要素回归分析得出,研究时间段内康平地区气候整体转湿,并且在生态系统恢复工程实施后尤为显著,适合陆表植被生长和恢复。研究最终得出,康平地区生态系统格局演变的主要驱动力为该地区自上世纪末实施的一系列生态系统恢复工程,辅助驱动力为该地区年起沙风天数减少和气候转湿的结论。

关键词：生态系统格局康平遥感生态系统恢复工程