检索结果-南通市图书馆

Chinese Physics B 2022年第2期31卷 538-546页

作者： yaowen long Hong Zhang Xinlu Cheng College of Physics Sichuan UniversityChengdu 610065China Key Laboratory of High Energy Density Physics and Technology(Ministry of Education) Sichuan UniversityChengdu 610065China Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065China

The lead-free perovskites Cs_(3)B_(2)X_(9)(B=Sb,Bi;X=Cl,Br,I)as the popular photoelectric materials have excellent optical properties with lower *** this study,we systematically investigate the stable monolayer Cs_(3)B_(2)X_(9)and bilayer vertical heterostructure Cs_(3)B_(2)X_(9)/Cs3B02X9(B,B0=Sb,Bi;X=Cl,Br,I)via first-principles *** exploring the electrical structures and band edge positions,we find the band gap reduction and the band type transition in the heterostructure Cs_(3)B_(2)X_(9)/Cs3B02X9 due to the charge transfer between ***,the results of optical properties reveal light absorption from the visible light to UV region,especially monolayer Cs3Sb2I9 and heterostructure Cs3Sb2I9/Cs3Bi2I9,which have absorption peaks in the visible light region,leading to the possibility of photocatalytic water *** results provide insights for more two-dimensional semiconductors applied in the optoelectronic and photocatalytic fields.

关键词： first principles simulations lead-free perovskite monolayer Cs_(3)B_(2)X_(9) vertical heterostructure Cs_(3)B_(2)X_(9)/Cs_(3)B’_(2)X_(9) photoelectric materials

Preparation and Evaluation of MPEG-PCL Polymeric Nanoparticles Against Gastric Cancer

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1162-1168页

作者： LIU Xia LI Juncan HUANG long YANG Jin WANG yaowen YANG Mengjia TANG Mingxiu QIU Tong School of Chemistry Chemical Engineering and Life SciencesWuhan University of technologyWuhan 430070China China Tobacco Hubei Industrial Co. LtdWuhan 430000China College of Chemical and Environmental Engineering Hubei University for NationalitiesEnshi 445000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of TechnologyWuhan 430070China

This paper provides a new treatment for gastric cancer with a new OMT delivery *** synthesized MPEG-PCL,an amphiphilic polymer,to construct a nanoparticle encapsulated OMT by pH gradient method,and then examined the nanodrug’s therapeutic *** integral analytical method was used to characterize the structure of *** single factor method and orthogonal test were utilized to investigate the optimum preparation *** morphology and average size of the OMT-NPs were analyzed by transmission electron microscopy and ***-8 assay and confocal fluorescent microscope were used to study the inhibitory effect on SGC-7901 gastric cancer *** average size of nanoparticles was 95.86±1.54 *** maximum encapsulation efficiency of OMT was 46.84±4.37%,while the drug loading content was 8.89±1.09%.The cumulative release of nanoparticles was 73.07±1.5%,inspected through dynamic dialysis in *** with free OMT,OMT-NPs showed enhanced cytotoxic effects in SGC-7901 *** nanoparticles could efficiently deliver the OMT into the cancer cells and release *** OMT delivery system prepared in this paper provides a potential platform for the treatment of gastric cancer..

关键词： MPEG-PCL nanoparticles oxymatrine gastric cancer

Human settlement and changes in the distribution of river systems in the Minqin Basin over the past 2000 years in Northwest China

在线全文

学校读者我要写书评

暂无评论

Ecosystem Health and Sustainability 2017年第11期3卷 2-13页

作者： yaowen Xie Qiang Bie Chansheng He School of Earth and Environmental Science Lanzhou UniversityLanzhouChina The Key Laboratory of Western China’s Environmental Systems Ministry of Education(MOE)LanzhouChina Center for Dryland Water Resources Research and Watershed Science Lanzhou UniversityLanzhouChina

Introduction:Arid area is an important base for human settlement,however,long and drastic human activities have altered the drainage patterns in the arid watersheds significantly,causing serious ecological *** study,through a case study of the Minqin Basin,a microcosm of the artificial oases in the arid northwest China,used the multitypes of data to recover the spatial distribution of human settlement and drainage patterns during historical period and analyze the relationship between them over the past 2000 ***:Before the Han Dynasty(121 BC),the utilization of water resources in the Minqin Basin was in the primitive stage and the drainage pattern maintained the natural *** the Han(121 BC-220)to the Wei-Jin Dynasties(220-316),the utilization of water resources intensified unprecedentedly,but the natural shape of the river systems was still *** the following 1,000 years or so,the drainage pattern was in the state of“following its own course”due to the small human *** the Ming Dynasty(1368-1644),with the alteration of the main rivers,the water resource utilization increased obviously,but the human reclamations were mainly confined to the southern part of the *** the Qing Dynasty(1644-1911),the reclamation of the Liulin Lake area significantly changed the drainage patterns,resulted in the drastically northward expansion of human *** the foundation of the People’s Republic of China(PRC)in 1949,the artificial water system completely replaced the natural water system and intensified the ecological problems in the ***:The changes over the past 2000 years show the drastic impacts of human activities on the alterations of the drainage patterns and related ecological problems in the arid Northwest ***:Rehabilitation of such ecological impairments requires both ecological restoration projects and changes in human paradigm and behavior over multiple temporal and spatial scales.

关键词： Minqin Basin Chinese Dynasties human settlement utilization of water resources drainage pattern

Simultaneous Optimization of Efficiency,Stretchability,and Stability in All-Polymer Solar Cells via Aggregation Control

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

Chinese Journal of Chemistry 2023年第2期41卷 159-166页

作者： Kaihu Xian Kangkang Zhou Mingfei Li Junwei Liu yaowen Zhang Tao Zhang Yong Cui Wenchao Zhao Chunming Yang Jianhui Hou Yanhou Geng long Ye School of Materials Science&Engineering Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin Universityand Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300350China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Polymer Physics and ChemistryCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China College of Materials Science and Engineering Nanjing Forestry UniversityNanjingJiangsu 210037China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhouFujian 350207China

With the emergence of Y-series small molecule acceptors,polymerizing the small molecule acceptors with aromatic linker units has attracted significant research attention,which has greatly advanced the photovoltaic performance of all-polymer solar *** the rapid increase in efficiency,the unique characteristics(e.g.,mechanical stretchability and flexibility)of all-polymer systems were still not thoroughly *** this work,we demonstrate an effective approach to simultaneously improve device performance,stability,and mechanical robustness of all-polymer solar cells by properly suppressing the aggregation and crystallization behaviors of polymerized Y-series ***,when introducing 50 wt%PYF-IT(a fluorinated version of PY-IT)into the well-known PM6:PY-IT system,the all-polymer devices delivered an impressive photovoltaic efficiency of 16.6%,significantly higher than that of the control binary cell(15.0%).Compared with the two binary systems,the optimal ternary blend exhibits more efficient charge separation and balanced charge transport accompanying with less ***,a high-performance 1.0 cm^(2)large-area device of 15%efficiency was demonstrated for the optimized ternary all-polymer blend,which offered a desirable PCE of 14.5%on flexible substrates and improved mechanical flexibility after bending 1000 ***,these are among the best results for 1.0 cm^(2)all-polymer OPVs thus *** work also heralds a bright future of all-polymer systems for flexible wearable energy-harvesting applications.

关键词： Organic photovoltaics Polymer acceptors Aggregation Stretchability Stability

Contact angle and stability of interfacial nanobubble supported by gas monolayer

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

Fundamental Research 2024年第1期4卷 35-42页

作者： Haichang Yang yaowen Xing Fanfan Zhang Xiahui Gui Yijun Cao Chinese National Engineering Research Center of Coal Preparation and Purification China University of Mining and TechnologyXuzhou 221116China School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou 221116China Henan Province Industrial Technology Research Institution of Resources and Materials Zhengzhou UniversityZhengzhou 450001China

Since solid-liquid interfacial nanobubbles(INBs)were first imaged,their long-term stability and large contact angle have been perplexing *** study aimed to investigate the influence of internal gas density and external gas monolayers on the contact angle and stability of INB using molecular dynamics ***,the contact angle of a water droplet was simulated at different nitrogen *** results showed that the contact angle increased sharply with an increase in nitrogen density,which was mainly caused by the decrease in solid-gas interfacial ***,when the nitrogen density reached 2.57 nm^(-3),an intervening gas monolayer(GML)was formed between the solid and *** the formation of GML,the contact angle slightly increased with increasing gas *** contact angle increased to 180°when the nitrogen density reached 11.38 nm^(-3),indicating that INBs transformed into a gas layer when they were too *** substrates with different hydrophobicities,the contact angle after the formation of GML was always larger than 140°and it was weakly correlated with substrate *** increase in contact angle with gas density represents the evolution of contact angle from macro-to nano-bubble,while the formation of GML may correspond to stable *** potential of mean force curves demonstrated that the substrate with GML could attract gas molecules from a longer distance without the existence of a potential barrier compared with the bare substrate,indicating the potential of GML to act as a gas-collecting *** research indicated that GML can function as a channel to transport gas molecules to INBs,which favors stability of *** research may shed new light on the mechanisms underlying abnormal contact angle and long-term stability of INBs.

关键词： Interfacial tension Hydrophobicity Potential of mean force Gas density Molecular dynamics simulations

基于阳虚寒凝血瘀病机以温阳活血法针刺治疗郁证

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

北京中医药大学学报 2024年第7期47卷 1012-1016页

作者：杜耀文王珑黑龙江中医药大学哈尔滨150040 黑龙江中医药大学附属第一医院

人体结构与功能复杂,虽有五脏六腑之分、气血阴阳之别,但生命活动恒而不止的根本仍在于一身之阳气。生理上,人体阳气充足,则血行滑利而不滞,五脏皆得所养,故五神可安;病理上,寒伤阳气造成血行凝涩,久之血瘀脉中,导致五脏失养,进而五神... 详细信息

人体结构与功能复杂,虽有五脏六腑之分、气血阴阳之别,但生命活动恒而不止的根本仍在于一身之阳气。生理上,人体阳气充足,则血行滑利而不滞,五脏皆得所养,故五神可安;病理上,寒伤阳气造成血行凝涩,久之血瘀脉中,导致五脏失养,进而五神飞扬。郁证正是寒凝血瘀容易引发的疾病之一,对此采用针刺疗法,遵循温阳活血的原则,主取百会、大椎、至阳、命门、关元、足三里以温阳补气,血海、委中、三阴交以活血通脉;辅以膻中、中脘、气海、合谷、太冲等穴理气开滞,以助气血运行。全方标本兼顾,攻补兼施,可使虚阳得复,瘀血得行,随之气血盈满平和,五脏五神皆得其滋养,则郁证自愈。

关键词：郁证阳虚寒凝血瘀温阳活血针刺

Integrated treatment for lower-limb stage Ⅱ thromboangiitis obliterans by interventional therapy and oral administration of Chinese medicine: a randomized controlled clinical trial

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2015年第1期35卷 41-46页

作者： Chang yaowen Li Fenqiang Wang Wenhui Song Laichang Li Li Li Zhengfei Su Dongjun Fu Zhaoliang Department of Integrated Chinese and Western Medicine with Interventional Therapy the First Affiliated Hospital of Lanzhou University Department of Integrated Chinese and Western Medicine Gansu University of Traditional Chinese Medicine

OBJECTIVE： To observe if integrated treatment is better than other therapies for lower-limb stage Ⅱ thromboangiitis obliterans （TAO）. METHODS： Ninety lower-limb stage Ⅱ or worse TAO patients were randomly divided into three groups： group A （30 cases） treated by intervention and oral administration of Chinese medicine; group B （30 cases） treated by intervention alone; and group C （30 cases） treated only with oral adminis- tration of Chinese medicine. Therapeutic effects were observed, including the cure rate; the recurrence rate after one month, three months, six months, nine months, and one year; the ankle brachial indexes; the incidence of complications; and the level of C-reactive protein and erythrocyte sedimentation ***： Group A had significantly better clinically curative effects, related indexes, and outcomes during the long-term follow-up survey, than that of groups B and C. CONCLUSION： Integrated treatment is more effective for treating lower-limb stage Ⅱ or worseTAO.

关键词： Thromboangiitis obliterans Lower ex-tremity Intervention studies Medicine, Chinese traditional Treatment outcome Randomized controlled trials

A Study of Metaphor in Science

在线全文

学校读者我要写书评

暂无评论

华东交通大学学报 2004年第6期21卷 144-147,163页

作者： yaowen-qun SchoolofForeignlanguage EastChinaJiaotongUniv.Nanehang330013China

长期以来,人们普遍认为隐喻是一种用来增强文彩的修辞手段;而科技语言一贯以专业、严谨,精确和朴实著称,因此隐喻不应存在于科技语言中.然而,随着认知学的发展,大量的研究和事例证明生活中存在着大量的隐喻,其中包括科技语言.本文试图... 详细信息

长期以来,人们普遍认为隐喻是一种用来增强文彩的修辞手段;而科技语言一贯以专业、严谨,精确和朴实著称,因此隐喻不应存在于科技语言中.然而,随着认知学的发展,大量的研究和事例证明生活中存在着大量的隐喻,其中包括科技语言.本文试图从分析科技隐喻的产生动机,产生途径及巨大功能方面来较为全面地展示科技隐喻的概貌,从而加强人们对科技隐喻的认识与理解.

关键词：科技语言科技隐喻产生途径产生动机

顾及组合导航闭环反馈的变分贝叶斯自适应滤波优化算法

在线全文

学校读者我要写书评

暂无评论

测绘学报 2023年第5期52卷 725-737页

作者：李增科孙耀文陈昭冰赵龙高井祥中国矿业大学环境与测绘学院江苏徐州221116 江苏省资源环境信息工程重点实验室江苏徐州221116

多传感器组合的方式可以较好地应对全球导航卫星系统信号被遮挡、干扰等情况下的导航定位问题,滤波方法是导航定位中将多源数据融合最常使用的方法之一。在滤波过程中,组合导航的系统噪声和量测噪声无法实时精确地测定,常通过自适应滤... 详细信息

多传感器组合的方式可以较好地应对全球导航卫星系统信号被遮挡、干扰等情况下的导航定位问题,滤波方法是导航定位中将多源数据融合最常使用的方法之一。在滤波过程中,组合导航的系统噪声和量测噪声无法实时精确地测定,常通过自适应滤波的方法进行时间更新和量测更新的平衡解算。贝叶斯自适应滤波方法在很多时候具有较好的效果,但是和其他的自适应滤波方法一样,该类方法都需要进行自适应因子的选取。本文根据组合导航对于实时性要求及其闭环反馈的特殊性,在变分贝叶斯自适应滤波的基础上进行了算法的优化,给出了一种调节因子的动态计算方法,并以GNSS和惯性导航系统组合系统为例,通过模拟和实测试验进行验证。试验结果表明,本文算法不需要通过迭代计算的方法就可以获取高精度组合结果,提升了计算效率;对于真实的动态场景中,本文算法的调节因子动态自适应确定,结果更具有优越性。

关键词：变分贝叶斯自适应滤波组合导航闭环反馈

在线全文

学校读者我要写书评

暂无评论

处方组成对槲皮素传递体透皮作用的影响

中国医药工业杂志 2017年第4期48卷 523-528页

作者：卢耀文杨升云龙晓英魏秋霞广东药科大学广东广州510006

采用注入法-高压均质法制备槲皮素(1)传递体。采用改良Franz扩散池法,考察不同表面活性剂(Tween-80、胆酸钠、癸酸钠及油酸钠)、氯化钠及磷脂种类对传递体中1的累积渗透量及皮肤滞留量的影响。其中,采用蛋黄卵磷脂以及Tween-80、胆酸钠... 详细信息

采用注入法-高压均质法制备槲皮素(1)传递体。采用改良Franz扩散池法,考察不同表面活性剂(Tween-80、胆酸钠、癸酸钠及油酸钠)、氯化钠及磷脂种类对传递体中1的累积渗透量及皮肤滞留量的影响。其中,采用蛋黄卵磷脂以及Tween-80、胆酸钠、癸酸钠或油酸钠制备的1传递体,24 h累积渗透量分别为(9.37±2.59)、(8.73±1.34)、(6.79±1.83)和(3.46±0.66)mg/cm^2;皮肤滞留量为0.97~1.34mg/cm^2。与1混悬剂组[24 h累积渗透量为0,皮肤滞留量为(0.11±0.06)mg/cm^2]相比,传递体中1的透皮能力和皮肤滞留量显著提高(P0.05)。结果显示,以Tween-80及大豆磷脂为材料,不加入氯化钠制备的1传递体z电位为(-38.0±1.5)mV,并显著提高了1的皮肤渗透性及滞留量。

关键词：槲皮素处方传递体透皮皮肤滞留量