检索结果-南通市图书馆

Retrieval of urban slow deformation using the multi-baseline DInSAR technique

Chinese Science Bulletin 2008年第23期53卷 3705-3714页

作者： wu mao ZHANG hong WANG Chao tang YiXian wu hongAn The State Key Laboratory of Remote Sensing Science Sponsored Jointly by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China Center for Earth Observation and Digital Earth Chinese Academy of Sciences Beijing 100086 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

The investigation of slow displacement in urban areas using the multi-baseline DInSAR technique has been a hot research topic in the field of DInSAR. The basic flow of this technique includes several steps such as the combination of interferometric image pairs, generation of differential interferograms, selection of high coherent points, generation of the Delaunay triangular network, calculation and integration of increments in network, unwrapping and calibration of the residual phase, and the estimation of both atmospheric and nonlinear displacement phase. Among these steps, the calculation of increments is the key to retrieve linear displacement, while unwrapping and calibration of the residual phase are the keys to retrieve nonlinear displacement. In order to improve the performance of these two steps, this paper proposes a modified model coherence function for increments estimation, and a triangular "circle" algorithm to deal with phase unwrapping and calibration. Based on the above algorithms, the subsidence of Suzhou City is investigated using 24 ERS scenes from February 1993 to December 2000. The results show that the linear subsidence velocity of the most urban area is about -20 to -30 mm/a during the time, with a yearly decrease in velocity. The displacement seems to be stable after 2000. Leveling data validate our results and demonstrate the reliability of the algorithm.

关键词：基线 DInSAR 地表面变形遥感技术

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quasi-static and low-velocity impact mechanical behaviors of entangled porous metallic wire material under different temperatures

引用

Defence Technology（防务技术） 2023年第1期19卷 143-152页

作者： Yi-wan wu Hu Cheng Shang-zhou Li Yu tang hong-bai Bai Chun-hong Lu Engineering Research Center for Metal Rubber School of Mechanical Engineering and AutomationFuzhou UniversityFuzhou350116China Department of Automotive Engineering Hebei College of Industry and TechnologyShijiazhuang050091China

To improve the defense capability of military equipment under extreme conditions,impact-resistant and high-energy-consuming materials have to be *** damping characteristic of entangled porous metallic wire materials(EPMWM)for vibration isolation was previously *** this paper,a study focusing on the impact-resistance of EPMWM with the consideration of ambient temperature is *** quasi-static and low-velocity impact mechanical behavior of EPMWM under different temperatures(25℃-300℃)are systematically *** results of the static compression test show that the damping energy dissipation of EPMWM increases with temperature while the nonlinear damping characteristics are gradually *** the impact experiments,the impact energy loss rate of EPMWM was between 65%and 85%,while the temperatures increased from 25℃to 300℃.Moreover,under the same drop impact conditions,the overall deformation of EPMWM decreases in the temperature range of 100℃-200℃.On the other hand,the impact stiffness,energy dissipation,and impact loss factor of EPMWM significantly increase with *** can be attributed to an increase in temperature,which changes the thermal expansion coefficient and contact state of the internal wire ***,the energy dissipation mode(dry friction,air damping,and plastic deformation)of EPMWM is also ***,the EPMWM may act as a potential candidate material for superior energy absorption applications.

关键词： Entangled porous metallic wire material Low-velocity impact High temperature Energy dissipation characteristics Mechanical behavior

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Grand canonical Monte Carlo simulation for hydrogen uptakes based on nanoporous NaBH_4

引用

Science China(Physics,Mechanics & Astronomy) 2013年第8期56卷 1525-1532页

作者： REN Juan ZHANG hong tang YongJian wu WeiDong WANG ChaoYang College of Physical Science and Technology Sichuan University Research Center of Laser Fusion China Academy of Engineering Physics

A new hydrogen storage route of 3D nanoporous sodium borohydride (NPSB) generated by removing special atoms is proposed in this work. Three different size pores of NPSB-1 (7), NPSB-2 (10) and NPSB-3 (14) are presented, and the hydrogen storage capacities of these NPSBs are simulated by employing a grand canonical Monte Carlo (GCMC) procedure for a temperature range of 77-298 K and a pressure range of 0.1-100 bar. The effects of pore diameter, temperature and pressure on the hydrogen adsorption have been examined. The results show that the adsorption of hydrogen decreases and increases with increasing temperature and hydrogen pressure, respectively. It also reflects that the hydrogen adsorption capacities at higher pressures are dependent on pore diameter, while independent of pore diameter at lower pressures.

关键词： nanoporous hydrogen storage GCMC NaBH4

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fatty acid profiles of muscle from large yellow croaker (Pseudosciaena crocea R.) of different age

引用

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第2期10卷 154-158页

作者： hong-gang tang Li-hong CHEN Chao-geng XIAO Tian-xing wu Zhejiang Academy af Agricultural Sciences Hangzhou 310021 China Department of Chemistry Zhejiang University Hangzhou 310027 China

We investigated the fatty acid profiles of muscle from large yellow croaker （Pseudosciaena crocea R.） of different age. One- and two-year-old fish were cultured in floating net cages and sampled randomly for analysis. Moisture, protein, lipid and ash contents were determined by methods of Association of Analytical Chemist （AOAC） International. Fatty acid profile was deter- mined by gas chromatography. Crude protein, fat, moisture and ash contents showed no significant differences between the two age groups. The contents of total polyunsaturated fatty acids and docosahexaenoic acid （DHA） were significantly higher and eicosapentaenoic acid （EPA） content was significantly lower in the two-year-old large yellow croaker than in the one-year-old （/＇〈0.05）. No significant differences were observed in the contents of total saturated fatty acids and monounsaturated fatty acids, or the ratio ofn-3/n-6 fatty acids among the large yellow croakers of the two age groups. We conclude that large yellow croakers are good food sources of EPA and DHA.

关键词： Fatty acid Large yellow croaker Age

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Semiconducting polymer dots with photosensitizer loading and peptide modification for enhanced cell penetration and photodynamic effect

引用

Chinese Chemical Letters 2017年第11期28卷 2164-2168页

作者： Ying tang Zi-Hui Meng hong Xu Chang-Feng wu Department of Gastroenterology The First Hospital of Jilin University Changchun 130021 China Department of Hepatobiliary-Pancreatic Surgery China-Japan Union Hospital of Jilin University Changchun 130033 China Department of Biomedical Engineering Southern University of Science and Technology Shenzhen 510855 China

This letter describes semiconducting polymer dots （Pdots） doped with a photosensitizer and modified with a cell penetrating peptide for photodynamic therapy （PDT）. The resulting Pdots exhibited efficient singlet oxygen （^1O2） generation mediated by intraparticle energy transfer. Experimental results indicated that the peptide-coated Pdots could promote the cellular uptake and increase the penetration efficiency in vitro, and effectively suppressed tumor growth and enhanced the photodynamic effect in vivo. Our results demonstrate that Pdots with photosensitizer loading and peptide modification hold great promise for cancer therapy.

关键词： Photodynamic therapy Cell penetrating peptides Polymer dots Photosensitizer Cancer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

12 GHz methanol maser outflow from the massive star-forming region: G35.20-0.74

引用

Research in Astronomy and Astrophysics 2013年第7期13卷 815-826页

作者： Qing-Zeng Yan Bo Zhang Zheng-hong tang Xing-wu Zheng Shanghai Astronomical Observatory Chinese Academy of Sciences Max-Plank-Institut für Radioastronomie Auf dem Hügel 6953121 BonnGermany School of Astronomy and Space Science Nanjing University

We report the internal proper motions of 12 GHz methanol masers in mas-sive star-forming region G35.20-0.74 observed with the Very Long Baseline Array （VLBA） at four epochs spanning about 1.5 yr. Two groups of maser features were de-tected, groups A and B, and the latter that had a V-shaped spatial distribution is likely tracing the north outflow in G35.20-0.74. We present a three-dimensional model for the kinematics of these masers, by assuming the interstellar medium was blown by the stellar wind from the driving source （G35.2N） of the outflow. Adopting a position angle of ～ 81° for the main axis of the outflow from previous studies, we estimate an inclination of 35 ° ± 5.5°, a velocity of 8.1 ± 0.7 km s^-1 for the stellar wind along the main axis and an expansion speed gradient of 0.05 ± 0.016 km s^-1 AU^-1. From the model, we derive the age of the north outflow in G35.20-0.74 to be ～ 1.6 × 10^4 yr.

关键词： masers - ISM: molecules - stars: kinematics - stars: individual(G35.20-0.74) - stars: winds outflows

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Energy‐based analysis of seismic damage mechanism of multi‐anchor piles in tunnel crossing landslide area

引用

Deep Underground Science and Engineering 2023年第3期2卷 245-261页

作者： hong Wei honggang wu Guojun Ren Lin tang Kang Feng College of Resource and Environment Engineering Guizhou UniversityGuiyangChina China Northwest Research Institute Co.Ltd.of CREC LanzhouChina College of Civil Engineering and Architecture Southwest University of Science and TechnologyMianyangChina

To study the damage mechanism of multi‐anchor piles in tunnel crossing landslide area under earthquake,the damping performance of multi‐anchor piles was *** energy dissipation springs were used as the optimization device of the anchor head to carry out the shaking table comparison test on the reinforced *** Hilbert spectrum and Hilbert marginal spectrum were proposed to analyze the seismic damage mechanism of the multi‐anchor piles,and the peak Fourier spectrum amplitude(PFSA)was used to verify the effectiveness of the *** results show that the seismic energy is concentrated in the high‐frequency component(30-40Hz)of the Hilbert spectrum and the low‐frequency component(12-30 Hz)of the marginal *** indicates that they can be combined with the distribution law of the PFSA to identify the overall and local dynamic responses of the multi‐anchored piles,*** stretchable deformation of the energy‐dissipation springs improves the coordination of the multi‐anchor piles,resulting in better pile *** damage mechanism of the multi‐anchor piles is elucidated based on the energy method:local damage at the top and middle areas of the multi‐anchor piles is mainly caused by the low‐frequency component(12-30 Hz)of the marginal spectrum under the action of 0.15g and 0.20g seismic *** the seismic intensity increases to 0.30g,the dynamic response of the slope is further amplified by the high‐frequency component(30-40 Hz)of the Hilbert energy spectrum,which leads to the overall damage of the multi‐anchor piles.

关键词： Hilbert-Huang transform marginal spectrum multi‐anchor piles seismic damage mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Design of A Bionic Spudcan and Analysis of Penetration and Extraction Performances for Jack-up Platform

引用

China Ocean Engineering 2020年第1期34卷 80-88页

作者： GUO Sheng ZHUANG hong tang Wen-xian wu Wen-le LIU Qin WANG Yue-yang School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Jiangsu Provincial Key Laboratory of Advanced Manufacturing for Marine Mechanical Equipment Jiangsu University of Science and TechnologyZhenjiang 212003China

The mechanisms of soil structure interaction have drawn much attention in the past years in the installation and operation of jack-up platform. A bionic spudcan produced by biomimetic of egg and snail shell is proposed, and the performance of the penetration and extraction are analyzed by numerical method. The geometric contour of egg and snail shell is measured, and its mathematical model is established respectively. According to the structure of existing spudcan of jack-up platform, three kinds of typical biomimetic spudcan are designed. Furthermore, numerical analysis models of biomimetic spudcan are established respectively to study the soil structure interaction mechanism in the process of penetration and extraction, and contrastive analysis of resistance characteristics are carried out. To conclude, the results show that the biomimetic spudcan facilitates the platform installation, and it is also beneficial to the improvement of the bearing capacity of spudcan.

关键词： jack-up platform egg shell snail shell bionic design spudcan soil structure interaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An organic free radical generator independent on hydrogen peroxide for chemodynamic and immunotherapy in vivo

引用

Journal of Materials Science & Technology 2024年第7期174卷 85-94页

作者： Yang Chen Yunpeng Song Chaojie tang hong Yang wu Wang Shiping Yang Zhiguo Zhou College of Chemistry and Materials Science International Joint Laboratory on Resource Chemistry of Ministry EducationShanghai Frontiers Science Center of Biomimetic CatalysisShanghai Normal UniversityShanghai 200234China Institute of Diagnostic and Interventional Radiology Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China

It is desirable to develop a free radical generator that is neither dependent on hydrogen peroxide nor external stimuli-triggered to achieve effective tumor ***,the free radical genera-tor MNPs-mCPBA was constructed with Zn_(0.4)Co_(0.6)F_(e2)O_(4)@Zn_(0.4)Mn_(0.6)Fe_(2)O_(4)nanoparticles(MNPs)and 3-chloroperbenzoic acid(mCPBA).We believe that the iron(Ⅱ)on the surface of MNPs-mCPBA maybe represent high reactive activity and promote the generation of a large number of organic free radicals(C_(6)H_(4)ClCOOO)in an acidic tumor microenvironment,which realizes the acid-dependent tumor treat-ment strategy independent on the H_(2)O_(2)level in *** addition,the generated organic free radicals(C_(6)H_(4)ClCOOO)effectively induced immunogenic cell death(ICD)and increased T cell ***-der the synergetic treatment with an anti-PD-L1 antibody(α-PD-L1),a favorable anti-tumor effect was achieved.

关键词： Organic free radicals Immunogenic cell death Immunotherapy Chemodynamic therapy

来源：

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

Spectrofluorimetric Determination of Trace Amounts of Gallium with Salicylaldehyde Benzoylhydrazone

引用

Chemical Research in Chinese Universities 1998年第3期14卷 37-41页

作者： tang Bo wu Chang ju WANG hong jian YEN Jian chong Department of Chemistry Shandong Normal UniversityJinan250014

The fluorescent reagent salicylaldehyde benzoylhydrazone(SABH) was synthesized and its ionization constants were estimated spectrophotometrically. The fluorescent reaction of this reagent with gallium was studied. Based on this chelation reaction, a spectrofluorimetric method was developed for the determination of gallium in a water medium at pH 3.2. Under these conditions, the Ga SABH complex has excitation and emission maxima at 372 and 455 nm, respectively. The linear range of the method was 0～150 μg/L and the detection limit was 0.36 μg/L of gallium when a standard addition method was used in the assay. The molar ratio of gallium to the reagent was 1∶3. The interference of other ions was studied. The extraction with n butyl acetate from a 6 mol/L hydrochloric acid medium was used to separate Ga from the interfering elements in semiconductor silicon and geological samples, and themethod has been successfully applied to the determination of gallium in these samples.

关键词： Salicylaldehyde benzoylhydrazone Gallium determination Spectrofluorimetry

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：