检索结果-南通市图书馆

An Adaptive Single Neural Control for Variable Step-Size P&O MPPT of Marine Current Turbine System

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2021年第5期35卷 750-758页

作者： li ming-zhu WANG Tian-zhen ZHOU Fu-na SHI ming Logistics Engineering College Shanghai Maritime UniversityShanghai 201306China Shanghai Investigation Design and Research Institute Co.LtdShanghai 200434China

Marine current energy has been increasingly used because of its predictable higher power *** to the external disturbances of various flow velocity and the high nonlinear effects on the marine current turbine(MCT)system,the nonlinear controllers which rely on precise mathematical models show poor performance under a high level of parameters’*** paper proposes an adaptive single neural control(ASNC)strategy for variable step-size perturb and observe(P&O)maximum power point tracking(MPPT)***,to automatically update the neuron weights of SNC for the nonlinear systems,an adaptive mechanism is proposed to adaptively adjust the weighting and learning ***,aiming to generate the exact reference speed for ASNC to extract the maximum power,a variable step-size law based on speed increment is designed to strike a balance between tracking speed and accuracy of P&O *** robust stability of the MCT control system is guaranteed by the Lyapunov *** simulation results show that this strategy has favorable adaptive performance under variable velocity conditions,and the MCT system operates at maximum power point steadily.

关键词： marine current turbine system perturb and observe single neural control adaptive mechanism maximum power point tracking

中国特色学徒制视角下旅游管理专业群建设思路与实践

在线全文

学校读者我要写书评

暂无评论

湖北开放职业学院学报 2024年第19期37卷 62-64页

作者：黎明珠杨春亮海南软件职业技术学院海南琼海571400

本文以海南软件职业技术学院旅游管理专业群建设为例,总结学校前期学徒制建设经验,剖析旅游管理专业群中国特色学徒制建设意义,基于旅游产业集聚的逻辑开展中国特色学徒制的人才培养模式改革,提出了旅游管理专业群实行中国特色学徒制人... 详细信息

本文以海南软件职业技术学院旅游管理专业群建设为例,总结学校前期学徒制建设经验,剖析旅游管理专业群中国特色学徒制建设意义,基于旅游产业集聚的逻辑开展中国特色学徒制的人才培养模式改革,提出了旅游管理专业群实行中国特色学徒制人才培养模式的具体举措。一是依托旅游管理专业群特点,建立中国特色学徒制的人才培养模式;二是以课程体系建设为核心,重构旅游管理专业群中国特色学徒制课程体系;三是激发教师主观能动性,打造旅游管理专业群“双语双能型”教师教学创新团队;四是建设旅游管理专业群核心课程教学资源;五是打造旅游管理专业群社会服务团队。

关键词：中国特色学徒制旅游管理专业群建设举措

生物基水性聚氨酯改性乳化沥青的制备及性能研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

应用化工 2024年第5期53卷 1109-1112,1118页

作者：李明珠刘方韬肖飞陈玉清山东省交通科学研究院山东济南250102 山东高速基础设施建设有限公司山东济南250102 齐河县住房和城乡建设局山东德州253076

为推动可再生资源及其低碳沥青材料的研究应用,以香草醛替代部分石油基多元醇制备了生物基水性聚氨酯(BWPU)及其改性乳化沥青(PUA)。采用核磁共振波谱、傅里叶红外光谱、分散与稳定性测试、力学拉伸以及态剪切流变试验(DSR),对生物基水... 详细信息

为推动可再生资源及其低碳沥青材料的研究应用,以香草醛替代部分石油基多元醇制备了生物基水性聚氨酯(BWPU)及其改性乳化沥青(PUA)。采用核磁共振波谱、傅里叶红外光谱、分散与稳定性测试、力学拉伸以及态剪切流变试验(DSR),对生物基水性聚氨酯及其改性乳化沥青的性能进行了评价。结果表明,BWPU具有香草醛封端的预期结构和12.85 MPa的拉伸强度、2055%的断裂拉伸应变,其与基质沥青乳液混合前后均表现出良好的储存稳定性。此外,BWPU的加入使得改性乳化沥青蒸发残留物比基质乳化沥青蒸发残留物具有更高的复模量和更小的相位角,赋予了乳化沥青蒸发残留物优异的弹性性能。

关键词：生物基材料水性聚氨酯乳化沥青基础性能流变性能

习近平文化思想引领乡村文化振兴:价值意蕴与实践路径

在线全文

学校读者我要写书评

暂无评论

华北理工大学学报（社会科学版） 2024年第5期24卷 106-112页

作者：赵成江李明珠兰州理工大学马克思主义学院甘肃兰州730050

习近平文化思想是新时代中国特色社会主义思想的最新成果和文化篇章,也是乡村文化振兴的理论指南和实践遵循。习近平文化思想引领乡村文化振兴具有重大价值意蕴,回应了乡村文化振兴的时代问题,深化了乡村文化振兴的规律性认识,指明了乡... 详细信息

习近平文化思想是新时代中国特色社会主义思想的最新成果和文化篇章,也是乡村文化振兴的理论指南和实践遵循。习近平文化思想引领乡村文化振兴具有重大价值意蕴,回应了乡村文化振兴的时代问题,深化了乡村文化振兴的规律性认识,指明了乡村文化振兴的发展路向。现阶段,乡村文化发展有多重历史与现实困境横亘于前:动力不足的主体困境、传统乡土文化重构的价值困境、文化产品不能有效满足农民需求的供给困境以及乡村文化资源流失的制度困境。要纾解乡村文化发展的诸多困境,就要以习近平文化思想为引领来振兴乡村文化,在解蔽与新生中呼吁乡村文化主体复归、在回归与超越中实现乡村文化价值重建、在外供与内生中促成乡村文化供给有效、在领航与探索中完成乡村文化制度建构。

关键词：习近平文化思想乡村文化振兴现实困境乡村文化自信

维普期刊数据库博看期刊

Apoptosis mechanisms of human gastric cancer cell line MKN-45 infected with human mutant p27

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2005年第47期11卷 7536-7540页

作者： Jin-Shui zhu Long Wang Guo-Qiang Cheng Qin li Zu-ming zhu li zhu Department of Gastroenterology Affiliated Sixth People's Hospital Shanghai Jiaotong University Shanghai 200233 China

AIM: To explore the inducing effect of human mutant p27 gene on the apoptosis of the human gastric cancer cell line MKN-45 and its associated mechanisms. METHODS: The recombinant adenovirus Ad-p27mt was constructed to infect the human gastric cancer cell line MKN-45. Using flow cytometry, TUNEL assay and DNA fragment analysis, we measured the apoptotic effect of Ad-p27mt on the human gastric cancer cells. RESULTS: Ad-p27mt was successfully constructed and the infection efficiency reached 100%. After 18 h of infection, we observed an apoptotic hypodiploid peak on the flow cytometer before G1-S and apoptotic characteristic bands in the DNA electrophoresis. The apoptotic rate detected by TUNEL method was significantly higher in the Ad-p27mt group (89.4±3.12%)compared to the control group (3.12±0.13%, P ＜ 0.01).CONCLUSION: Human mutant p27 can induce apoptosis of the human gastric cancer cells in vitro.

关键词： Gastric cancer Human mutant p27 Cell line MKN-45

Developments in metastatic pancreatic cancer:Is gemcitabine still the standard?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第8期18卷 736-745页

作者： Jie-Er Ying li-ming zhu Bi-Xia liu Department of Medical Ontology Zhejiang Cancer HospitalHangzhou 310022Zhejiang ProvinceChina

In the past 15 years, we have seen few therapeutic advances for patients with pancreatic cancer, which is the fourth leading cause of cancer-related death in the United States. Currently, only about 6% of patients with advanced disease respond to standard gemcitabine therapy, and median survival is only about 6 mo. Moreover, phase Ⅲ trials have shown that adding various cytotoxic and targeted chemotherapeutic agents to gemcitabine has failed to improve overall survival, except in cases in which gemcitabine combined with erlotinib show minimal survival benefi t. Several metaanalyses have shown that the combination of gemcitabine with either a platinum analog or capecitabine may lead to clinically relevant survival prolongation, especially for patients with good performance status. Meanwhile, many studies have focused on the pharmacokinetic modulation of gemcitabine by fi xed-dose administration, and metabolic or transport enzymes related to the response and toxicity of gemcitabine. Strikingly, a phase Ⅲ trial in 2010 showed that, in comparison to gemcitabine alone, the FOLFIRINOX regimen in patients with advanced disease and good performance status, produced better median overall survival, median progression-free survival, and objective response rates. This regimen also resulted in greater, albeit manageable toxicity.

关键词： Chemotherapy Palliative therapy Metasta-sis Biomarkers Pancreatic neoplasms

Molecular Recognition Based on Hydrogen-bonding in the Coliposomes of Phosphatidylcholine and Amphiphiles Using Nucleobases

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2006年第6期22卷 803-807页

作者： SONG li-ming zhu Tao WANG Qiu-sheng ZHANG Xiao li Guo-wen Key Lab for Supramolecular Structure and Materials of Ministry of Education Jilin University Changchun 130012 P. R. China

A functional amphiphile, N^6 -myristoyl-9-[ 8-（ 1-trimethylamino） octyl ] adenine bromide （MTOAB）, was used to form coliposomes of phosphatidyleholine（PC）, PC/thymine, and PC/TOTB using sonication . The morphologies of the coliposomes were characterized using TEM （transmission electron microscopy）. The UV-Vis spectroscopic behavior of PC/MTOAB/thymine （molar ratio = 5： 1： 1 ） and PC/MTOAB/TOTB （molar ratio = 5： 1： 1 ） of coliposomal solutions showed that as a result of base pairing, absorption intensity showed a decrease at 263 nm with increase of time. The decrease of absorption intensity is ascribed to the hypochromic effect, which is because of the formation of hydrogen bonds between adenine and thymine in the coliposomes. The same effect was also observed for the mixture of aqueous PC/MTOAB liposomes and PC/TOTB liposomes after fusion, whereas the nocomplementary coliposomcs formed from PC/MTOAB and PC/TOTB did not show these spectroscopic changes. The molecular recognition through hydrogen interactions between adenine and thymine is very slow because of the possible occurrence of molecular lateral diffusion and exchange of amphiphile before recognition progresses in coliposomes. These results provide useful information for the design of supramolecular devices such as vesicles and liposomes,which can be used to mimic primitive recognition processes observed in biological systems.

关键词： Coliposomes Nueleobase Molecular recognition Amphiphile

基于STIRPAT模型的山东省居住建筑运行碳排放影响因素研究

在线全文

学校读者我要写书评

暂无评论

建材技术与应用 2024年第3期 14-19页

作者：李明柱刘梦雪李华林吉林建筑大学经济与管理学院吉林长春130118

为有效实施建筑领域节能减排,实现双碳目标,以2005-2021年山东省居住建筑运行阶段碳排放数据为研究对象,利用STIRPAT模型对人口数量、人均GDP、人均消费支出、人均可支配收入、城镇化水平、居住建筑面积、单位建筑面积能耗、能源消耗强... 详细信息

为有效实施建筑领域节能减排,实现双碳目标,以2005-2021年山东省居住建筑运行阶段碳排放数据为研究对象,利用STIRPAT模型对人口数量、人均GDP、人均消费支出、人均可支配收入、城镇化水平、居住建筑面积、单位建筑面积能耗、能源消耗强度和能源结构等影响碳排放的因素进行岭回归分析。结果表明:人口数量、人均GDP、人均消费支出、人均可支配收入、城镇化水平、居住建筑面积、单位建筑面积能耗和能源消耗强度等的增加会促使碳排放量的增加,但能源结构的增加会抑制碳排放量的增加,其中人口数量是影响碳排放的关键因素。据此提出山东省居住建筑节能减排的建议和对策。

关键词：居住建筑运行碳排放 STIRPAT模型影响因素强度岭回归分析

Construction technology for deep tunnels crossing superhigh-temperature fault zones with high water surges

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2024年第8期18卷 1267-1280页

作者： Yong ZHAO Tingyu zhu li YU ming LU Sichuan–Xizang Railway Co. Ltd.Linzhi 860000China School of Civil Engineering Southwest Jiaotong UniversityChengdu 610036China

The harsh environment in tunnels with high geothermal temperatures and humidity can adversely impact machinery,personnel,and *** main causes of specific problems are the unknown mechanisms of local geothermal formation,inappropriate temperature control measures,and insufficient systematic *** this study,three work sections relating to a high geothermal tunnel are:the tunnel face,middle-of-tunnel section,and outside-oftunnel section.A cooling strategy is proposed to offer technical support in achieving comprehensive cooling,overall as well as for each of the ***,a comprehensive geological survey explores the mechanism and exact location of the heat ***,grouting and centralized drainage measures are used to control the heat release of hot *** ventilation,ice chillers and other applicable measures are used to control the ambient ***,a monitoring and early warning system is established to prevent *** cooling strategy has been applied in the field with good results.

关键词： high geothermal tunnels cooling strategy comprehensive cooling measures safety and security