检索结果-南通市图书馆

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古代苏州城市景观的历史地理透视

历史地理 1990年第1期 62-71页

作者：高泳源不详

文化景观被称为“附加在自然景观上的人类活动形态”,而属于文化景观的城市景观所受人文因素的影响,尤为深刻。欧洲城市的景观显然不同于中国城市,这是任何人都能识别的,主要在于它们有不同的文化背景所致。

关键词：城市景观文化景观自然景观人文因素苏州城市

激光-液体荧光法研究 Ⅱ.测定稀土元素铕和钐

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分析化学 1985年第1期 16-20页

作者：徐永源高维祥原子能研究所

激光-液体荧光法比常规光源的液体荧光法灵敏度高,这已得到很多实验的证实。脉冲激光和门检测系统相结合可有效地排除共存物质的干扰。铕和钐与TTA、邻菲啰啉形成的三元络合物是它们发荧光最强的化合物之一。用普通光源激发荧光时,检测... 详细信息

激光-液体荧光法比常规光源的液体荧光法灵敏度高,这已得到很多实验的证实。脉冲激光和门检测系统相结合可有效地排除共存物质的干扰。铕和钐与TTA、邻菲啰啉形成的三元络合物是它们发荧光最强的化合物之一。用普通光源激发荧光时,检测限为Eu 0.4ppb,Sm 10 ppb。UA-3型铀分析仪是以氮分子激光脉冲为激发源的荧光测定铀的仪器,我们曾在此仪器上加上适当滤光片,很灵敏地测定了铽、镝和钐。用此仪器以铕

关键词：三元络合物滤光片同时测定缓冲剂水相液体荧光法荧光光谱激光

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正性远紫外抗蚀剂 Ⅰ.聚苯乙烯砜的研究

高分子通讯 1984年第6期 408-413页

作者：杨永源高志民冯树京吴世康中国科学院感光化学研究所

合成了一种高分辨率的正性远紫外抗蚀剂—聚苯乙烯砜。其灵敏度比PMMA高6.5倍。分辨率达0.75微米,并发现灵敏度与分子量和膜厚有较大的依赖关系,分子量越大,灵敏度越高;膜越薄,灵敏度越高,紫外和红外光谱表明,在光照过程中生成了氢过氧... 详细信息

合成了一种高分辨率的正性远紫外抗蚀剂—聚苯乙烯砜。其灵敏度比PMMA高6.5倍。分辨率达0.75微米,并发现灵敏度与分子量和膜厚有较大的依赖关系,分子量越大,灵敏度越高;膜越薄,灵敏度越高,紫外和红外光谱表明,在光照过程中生成了氢过氧化物和羰基化合物。

关键词：远紫外 PMMA 聚苯乙烯聚合塑料抗蚀剂光照膜厚分辨率板灵敏度比正性

Spatiotemporal evolution of urban carbon emission performance in China and prediction of future trends

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Journal of Geographical Sciences 2020年第5期30卷 757-774页

作者： WANG Shaojian gao Shuang HUANG yongyuan SHI Chenyi Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation School of Geography and PlanningSun Yat-sen UniversityGuangzhou 510275China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China

Climate change resulting from CO_2 emissions has become an important global environmental issue in recent *** carbon emission performance is one way to reduce carbon *** carbon emission performance has been discussed at the national and industrial levels,city-level studies are lacking due to the limited availability of statistics on energy *** this study,based on city-level remote sensing data on carbon emissions in China from 1992–2013,we used the slacks-based measure of super-efficiency to evaluate urban carbon emission *** traditional Markov probability transfer matrix and spatial Markov probability transfer matrix were constructed to explore the spatiotemporal evolution of urban carbon emission performance in China for the first time and predict long-term trends in carbon emission *** results show that urban carbon emission performance in China steadily increased during the study period with some ***,the overall level of carbon emission performance remains low,indicating great potential for improvements in energy conservation and emission *** spatial pattern of urban carbon emission performance in China can be described as"high in the south and low in the north,"and significant differences in carbon emission performance were found between *** spatial Markov probabilistic transfer matrix results indicate that the transfer of carbon emission performance in Chinese cities is stable,resulting in a"club convergence"***,neighborhood backgrounds play an important role in the transfer between carbon emission performance *** on the prediction of long-term trends in carbon emission performance,carbon emission performance is expected to improve gradually over ***,China should continue to strengthen research and development aimed at improving urban carbon emission performance and achieving the national energy conservation and emission reducti

关键词： urban carbon emission performance super-efficiency SBM model spatial Markov chain spatiotemporal patterns trend prediction China

正性远紫外抗蚀剂 Ⅱ.聚苯乙烯砜的荧光光谱研究

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高分子通讯 1984年第6期 414-419页

作者：杨永源冯树京高志民吴世康中国科学院感光化学研究所

利用荧光光谱研究了聚苯乙烯砜正性远紫外抗蚀剂薄膜和溶液的光氧化反应。发现聚苯乙烯砜的荧光随光照时间的延长而逐步减少。这一现象和在未辐照的聚苯乙烯砜中加入微量的芳香氢过氧化物或羰基化合物时的情况相同。这表明:聚苯乙烯砜... 详细信息

利用荧光光谱研究了聚苯乙烯砜正性远紫外抗蚀剂薄膜和溶液的光氧化反应。发现聚苯乙烯砜的荧光随光照时间的延长而逐步减少。这一现象和在未辐照的聚苯乙烯砜中加入微量的芳香氢过氧化物或羰基化合物时的情况相同。这表明:聚苯乙烯砜经光照后荧光的淬灭和体系光氧化过程中产生了氢过氧化物或羰基化合物有关。这一方法适宜于对高聚物光氧化初始阶段的研究。

关键词：荧光光谱淬灭聚苯乙烯聚合塑料光氧化反应远紫外光照抗蚀剂正性

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小米椒生物力学特性试验研究

农机化研究 2025年第4期47卷 151-159页

作者：张善文孙永元张永吉戴敏缪宏张燕军高吉成扬州大学机械工程学院江苏扬州225009 江苏里下河地区农业科学研究所江苏扬州225007

为了提升小米椒的机械化收获质量和效率,对小米椒的物理及力学特性进行了试验测量。通过测量,小米椒在15天内的含水率为86%~90%,且中部最高、首部次之、尾部最低。通过拉伸试验,确定小米椒断裂时的抗拉强度为0.679 MPa±0.03 MPa。采用... 详细信息

为了提升小米椒的机械化收获质量和效率,对小米椒的物理及力学特性进行了试验测量。通过测量,小米椒在15天内的含水率为86%~90%,且中部最高、首部次之、尾部最低。通过拉伸试验,确定小米椒断裂时的抗拉强度为0.679 MPa±0.03 MPa。采用正交旋转组合设计方法,确定了加载速度对抗压强度的影响极显著,小米椒直径对抗压强度的影响显著,加载速度对剪切强度的影响显著。通过轴向压缩和剪切试验,确定了小米椒首部的抗压强度平均值为0.62 MPa,弹性模量平均值为2.72 MPa;中部抗压强度平均值为0.64 MPa,弹性模量平均值为3.17 MPa;尾部抗压强度平均值为0.61 MPa,弹性模量平均值为2.64 MPa,小米椒剪切强度平均值为0.32 MPa。

关键词：小米椒力学特性物理特性

Highly sensitive gas sensing material for polar gas molecule based on Janus group-Ⅲ chalcogenide monolayers: A first-principles investigation

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Science China(Technological Sciences) 2020年第8期63卷 1566-1576页

作者： PANG KaiJuan WEI YaDong LI WeiQi ZHOU Xin JIANG YingJie YANG JianQun LI XingJi gao Lang JIANG yongyuan School of Physics Harbin Institute of TechnologyHarbin 150001China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin University of Science and TechnologyHarbin 150080China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Gas sensors play an indispensable role in industrial,personal safety and environmental protection,and have been widely investigated by *** some cases,the sensitivity of a two-dimensional material sensor can be enhanced by generating vacancies or applying an external electric *** results can be achieved using Janus 2D materials,which have an inherent electric field and are good candidates for high-sensitivity gas *** this study,the electronic and transport properties of Janus group-Ⅲchalcogenide monolayers(Ga2SSe,In2SSe)were investigated for detecting CO2 and NO2 using first-principles *** several parameters that affect the performance of gas sensors,such as adsorption distances,adsorption energies,charge transfers and density of states(DOS),a detailed comparison of Janus group-Ⅲchalcogenide monolayers has been provided with their pristine systems,Janus group-Ⅲchalcogenide monolayers(Ga2SSe,In2SSe)have high *** was mainly ascribed to the built-in electric field caused by the out-of-plane asymmetric structure of Janus monolayer which enhances the dipole-dipole interaction between the polar gas molecule and the 2D *** the variation of transmission spectra of the Janus group-Ⅲchalcogenide monolayer before and after adsorbing molecules further proves the feasibility of this kind of material as a high-sensitivity gas sensor.

关键词： group-III chalcogenide monolayers gas sensors transmission spectrum electronic structure first-principles calculations

A tough,antibacterial and antioxidant hydrogel dressing accelerates wound healing and suppresses hypertrophic scar formation in infected wounds

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Bioactive Materials 2024年第4期34卷 269-281页

作者： Xiaoqing Liu Yiming Sun Jie Wang yongyuan Kang Zhaolong Wang Wangbei Cao Juan Ye Changyou gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310058China Eye Center The Second Affiliated Hospital of Zhejiang UniversitySchool of MedicineHangzhou310009China Center for Healthcare Materials Shaoxing InstituteZhejiang UniversityShaoxing312099China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030000China

Wound management is an important issue that places enormous pressure on the physical and mental health of patients,especially in cases of infection,where the increased inflammatory response could lead to severe hypertrophic scars(HSs).In this study,a hydrogel dressing was developed by combining the high strength and toughness,swelling resistance,antibacterial and antioxidant *** hydrogel matrix was composed of a double network of polyvinyl alcohol(PVA)and agarose with excellent mechanical *** polylysine(HBPL),a highly effective antibacterial cationic polymer,and tannic acid(TA),a strong antioxidant molecule,were added to the hydrogel as functional *** of antibacterial and antioxidant properties of the hydrogel confirmed the full play of the efficacy of HBPL and *** the in vivo studies of methicillin-resistant Staphylococcus aureus(MRSA)infection,the hydrogel had shown obvious promotion of wound healing,and more profoundly,significant suppression of scar *** to the common raw materials and simple preparation methods,this hydrogel can be mass produced and used for accelerating wound healing while preventing HSs in infected wounds.

关键词： Hydrogel dressing Hypertrophic scars Wound healing Bacterial infection ROS-scavenging

On observability of Galois nonlinear feedback shift registers over finite fields

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Frontiers of Information Technology & Electronic Engineering 2022年第10期23卷 1533-1545页

作者： Zhe gao Jun’e FENG yongyuan YU Yanjun CUI School of Mathematics Shandong UniversityJinan 250100China Department of Computer Science&Engineering University of Minnesota Twin CitiesMinneapolisMN 55455USA

Observability ensures that any two distinct initial states can be uniquely determined by their outputs,so the stream ciphers can avoid unobservable nonlinear feedback shift registers(NFSRs)to prevent the occurrence of equivalent *** paper discusses the observability of Galois NFSRs over finite *** NFSRs are treated as logical networks using the semi-tensor *** vector form of the state transition matrix is introduced,by which a necessary and sufficient condition is proposed,as well as an algorithm for determining the observability of general Galois ***,a new observability matrix is defined,which can derive a matrix method with lower computation ***,the observability of two special types of Galois NFSRs,a full-length Galois NFSR and a nonsingular Galois NFSR,is *** methods are proposed to determine the observability of these two special types of NFSRs,and some numerical examples are provided to support these results.

关键词： Observability Nonlinear feedback shift registers(NFSRs) Galois NFSRs Semi-tensor product Finite fields Logical networks