检索结果-南通市图书馆

Wolfberry extracts inhibit Aβ1-42 aggregation and rescue memory loss of AD drosophila

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2020年第1期9卷 64-70页

作者： cai-hong li Jun-li Yang CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical Physics(LICP)Chinese Academy of Sciences(CAS)Lanzhou 730000PR China University of Chinese Academy of Sciences CASBeijing 100049PR China

This study is to investigate the potential of wolfberry water extracts for the treatment of Alzheimer’s disease(AD)and the relationship between their anti-AD property and the geographic locations in *** extracts of all wolfberry samples showed the potent to decrease self-induced Aβ1-42 aggregation and Cu2+-induced Aβ1-42 aggregation and the antioxidant capacity as well as the bioactivity for binding biometal.A transgenic drosophila model assay revealed that TE of S1 and S6(S1-TE and S6-TE)at 100μg/mL demonstrated the potent rescue effect on memory loss compared to the positive control memantine at 20μg/*** study also revealed the polysaccharide extracts could contribute to their anti-AD property,and the anti-AD activity conspicuously depends on growing *** samples S1 and S6 showed much more potent anti-AD *** this study demonstrated that the Chinese commonly consumed wolfberry in boiling water might have the beneficial function to prevent AD pathology.

关键词： Aβ1−42 Antioxidant bioactivity Anti-AD potential Bio-metal Drosophila Wolfberry

Subcapsular hepatic haematoma after endoscopic retrograde cholangiopancrea-tography: An unusual case

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第9期19卷 1502-1504页

作者： Bao-Ying Fei cai-hong li Department of Gastroenterology Zhejiang Provincial People's Hospital

Subcapsular hepatic haematoma is a rare complication of endoscopic retrograde cholangiopancrea-tography (ERCP), and there are few reports about this unusual complication worldwide. The primary symptom of most cases reported in the literature is abdominal pain. We report an unusual case with the primary symptom of fever. A 56-year-old man who had a six-month history of recurrent episodes of upper abdominal pain was diagnosed with a common bile duct stone by magnetic resonance cholangiopancrea-tography. Endoscopic biliary sphincterotomy was performed, and stones from the common bile duct were successfully extracted with a basket. The patient had a persistent fever after ERCP, and treatment with intravenous antibiotics was unsuccessful. Computed tomography showed a 13 cm × 6 cm subcapsular hepatic haematoma filled with air and liquid on the surface of the right hepatic lobe. The patient was successfully treated with peritoneal drainage under B-ultra guidance. Subcapsular liver haematoma should be considered when hard-toexplain symptoms persist in the early period after ERCP. Percutaneous drainage is an effective treatment.

关键词： Endoscopic retrograde cholangiopancreatography Hepatic Hematoma Complication Treatment

Self-Organized Public-Key Management for Mobile Ad Hoc Networks Based on a Bidirectional Trust Model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2006年第1期11卷 188-192页

作者： FU cai hong Fan li Rui-xian hong liang CHEN Jing College of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 Hubei China

In traditional networks , the authentication is performed by certificate authoritys（CA）,which can＇t be built in distributed mobile Ad Hoc Networks however. In this pa per, we propose a fully self-organized public key management based on bidirectional trust model without any centralized authority that allows users to generate their public-private key pairs, to issue certificates, and the trust relation spreads rationally according to the truly human relations. In contrast with the traditional self-organized public-key management, the average certificates paths get more short, the authentication passing rate gets more high and the most important is that the bidirectional trust based model satisfys the trust re quirement of hosts better.

关键词： Ad Hoc networks self-organize bidirectional trust public key management.

Influence of Backbone Structure on Properties of Directly Polymerized Phenoxy Resins from Epichlorohydrin and Various Aromatic Dihydric Phenols Monomers

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2007年第5期23卷 607-612页

作者： cai hong-li BI Da-wu SHAO Ke Zhong Shuang-ling NA Hui Alan G. MacDiarmid Institute College of Chemistry Jilin University Changchun 130021 P. R. China

A series of phenoxy resins was directly prepared through the polymerization of each of the various aromatic dihydric phenols and *** and 1H NMR spectra were recorded to characterize the structures of the *** GPC curves were used to determine the molecular weight *** addition,the thermal properties of the resins were studied with differential scanning calorimetry（DSC）and thermal gravimetric analysis（TGA）.The thermal stabilities of the polymers increased with the content of the benzene ring,pendant group increasing or biphenyl groups *** adhesive properties of the polymers were evaluated in terms of the lap shear strength with Fe-Fe *** fracture mechanisms were determined by SEM observation and it was found that there was an important participation of cohesive fracture ***,it has been demonstrated that the extension of these micro-cohesive mechanisms is directly correlated with the adhesive *** to these results,the phenoxy resin containing biphenyl groups presented a higher adhesive strength and could improve the adhesive property of the epoxy/phenoxy system to a certain extent.

关键词： Phenoxy resin Thermal property Adhesive property

Potential seismic landslide hazard and engineering effect in the Ya’an-linzhi section of the Sichuan-Tibet transportation corridor, China

在线全文

学校读者我要写书评

暂无评论

China Geology 2023年第2期6卷 228-240页

作者： Zhi-hua Yang Chang-bao Guo Rui-an Wu Wei-wei Shao Peng-fei Yu cai-hong li Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Active Tectonics and Geological Safety Ministry of Natural ResourcesBeijing 100081China State Key Laboratory of Resources and Environmental Information System Beijing 100101China China University of Geosciences Wuhan 430074China China University of Geosciences(Beijing) Beijing 100083China

The Sichuan-Tibet transportation corridor is located at the eastern margin of the Qinghai-Tibet Plateau,where the complex topography and geological conditions,developed geo-hazards have severely restricted the planning and construction of major *** the long-term prevention and early control of regional seismic landslides,based on analyzing seismic landslide characteristics,the Newmark model was used to carry out the potential seismic landslide hazard assessment with a 50-year beyond probability 10%.The results show that the high seismic landslide hazard is mainly distributed along large active tectonic belts and deep-cut river canyons,and are significantly affected by the active *** low seismic landslide hazard is mainly distributed in the flat terrain such as the Quaternary basins,broad river valleys,and plateau planation *** major east-west linear projects mainly pass through five areas with high seismic landslide hazard:Luding-Kangding section,Yajiang-Xinlong(Yalong river)section,Batang-Baiyu(Jinsha river)section,Basu(Nujiang river)section,and Bomi-linzhi(eastern Himalaya syntaxis)*** seismic action of the Bomi-linzhi section can also induce high-risk geo-hazard chains such as the high-level glacial lake breaks and glacial debris *** early prevention of seismic landslides should be strengthened in the areas with high seismic landslide hazard.

关键词： Qinghai-Tibet Plateau Sichuan-Tibet transportation corridor Seismic landslide Hazard assessment Engineering effect

A chaotic coverage path planner for the mobile robot based on the Chebyshev map for special missions

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2017年第9期18卷 1305-1319页

作者： cai-hong li Yong SONG Feng-ying WANG Zhi-qiang WANG Yi-bin li College of Computer Science and Technology Shandong University of Technology Zibo 255000 China School of Mechanical Electrical & Information Engineering Shandong University Weihai 264209 China

We introduce a novel strategy of designing a chaotic coverage path planner for the mobile robot based on the Che- byshev map for achieving special missions. The designed chaotic path planner consists of a two-dimensional Chebyshev map which is constructed by two one-dimensional Chebyshev maps. The performance of the time sequences which are generated by the planner is improved by arcsine transformation to enhance the chaotic characteristics and uniform distribution. Then the coverage rate and randomness for achieving the special missions of the robot are enhanced. The chaotic Chebyshev system is mapped into the feasible region of the robot workplace by affine transformation. Then a universal algorithm of coverage path planning is designed for environments with obstacles. Simulation results show that the constructed chaotic path planner can avoid detection of the obstacles and the workplace boundaries, and runs safely in the feasible areas. The designed strategy is able to satisfy the requirements of randomness, coverage, and high efficiency for special missions.

关键词： Mobile robot Chebyshev map Chaotic Affine transformation Coverage path planning

Study on Microcavity Organic light-emitting Devices Containing Negative Refractive Index Dielectric Layer

在线全文

学校读者我要写书评

暂无评论

Semiconductor Photonics and Technology 2009年第3期15卷 153-157页

作者： cai hong-xin li li-xin School of Physics and Chemistry Henan Polytechnic University Jiaozuo 454000 CHN

A new structure containing negative refractive index dielectric layer（NRlDL） is introduced into microcavity. The properties of the new mierocavity organic light-emitting devices（MOLEDs） are investigated. In the experiment, the transfer matrix method is adopted. The dependence of reflectance and transmittance on the refractive index and thickness of NRIDL are analyzed in detail. Compared with the electroluminescence spectra of non-NRIDL diodes, the line widths of the spectra of the MOLEDs are narrower and all the peaks enhance. The results show that the new structure is beneficial to improve the performance and reduce the thickness of microcavity devices.

关键词： microcavity organic light-emitting device electroluminescence(EL) spectra negative refractive index dielectric layer

Complete coverage path planning for an Arnold system based mobile robot to perform specific types of missions

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2019年第11期20卷 1530-1542页

作者： cai-hong li Chun FANG Feng-ying WANG Bin XIA Yong SONG College of Computer Science and Technology Shandong University of TechnologyZibo 255000China School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China

We propose a contraction transformation algorithm to plan a complete coverage trajectory for a mobile robot to ac-complish specific types of missions based on the Arnold dynamical system. First, we construct a chaotic mobile robot by com-bining the variable z of the Arnold equation and the kinematic equation of the robot. Second, we construct the candidate sets including the initial points with a relatively high coverage rate of the constructed mobile robot. Then the trajectory is contracted to the current position of the robot based on the designed contraction transformation strategy, to form a continuous complete cov-erage trajectory to execute the specific types of missions. Compared with the traditional method, the designed algorithm requires no obstacle avoidance to the boundary of the given workplace, possesses a high coverage rate, and keeps the chaotic characteristics of the produced coverage trajectory relatively unchanged, which enables the robot to accomplish special missions with features of completeness, randomness, or unpredictability.

关键词： Chaotic mobile robot Arnold dynamical system Contraction transformation Complete coverage path planning Candidate set

在线全文

学校读者我要写书评

暂无评论

新型含联苯结构的酚氧树脂的性能研究

高等学校化学学报 2006年第2期27卷 372-374页

作者：蔡红莉那辉吉林大学麦克德尔米德实验室化学学院长春130021

在催化剂和分散剂存在的条件下,用3,3,′5,5′-四甲基-4,4′-联苯二酚和环氧氯丙烷缩聚,合成一种新的含联苯结构的酚氧树脂.用红外光谱、核磁共振氢谱、热失重分析仪、动态力学分析仪和电子拉力机对聚合物进行了分析和性能研究.结果表明... 详细信息

在催化剂和分散剂存在的条件下,用3,3,′5,5′-四甲基-4,4′-联苯二酚和环氧氯丙烷缩聚,合成一种新的含联苯结构的酚氧树脂.用红外光谱、核磁共振氢谱、热失重分析仪、动态力学分析仪和电子拉力机对聚合物进行了分析和性能研究.结果表明,这种新型酚氧树脂在热性能方面比双酚A型酚氧树脂有较大提高.

关键词：酚氧树脂 3,3’,5,5'-四甲基4,4’-联苯二酚热性能