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Tetraphenylethylene-conjugated polycation covered iron oxide nanoparticles for magnetic resonance/optical dual-mode imaging

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Regenerative Biomaterials 2021年第3期8卷 124-132页

作者： Li Yang Shengxiang Fu Li Liu Zhongyuan Cai Chunchao Xia Bin song Qiyong Gong Zhiyun Lu hua ai National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610065China Department of Radiology West China HospitalSichuan UniversityChengdu 610041China huaxi MR Research Center(HMRRC) Department of RadiologyWest China Hospital of Sichuan UniversityChengduChina Psychoradiology Research Unit of Chinese Academy of Medical Sciences Sichuan UniversityChengduChina Key Laboratory of Green Chemistry and Technology(Ministry of Education) College of ChemistrySichuan UniversityChengdu 610065China

Magnetic resonance(MR)/optical dual-mode imaging with high sensitivity and high tissue resolution have attracted many attentions in biomedical *** avert aggregation-caused quenching of conventional fluorescence chromophores,an aggregation-induced emission molecule tetraphenylethylene(TPE)-conjugated amphiphilic polyethylenimine(PEI)covered superparamagnetic iron oxide(Alkyl-PEI-LAC-TPE/SPIO nanocomposites)was prepared as an MR/optical dual-mode ***-PEI-LAC-TPE/SPIO nanocomposites exhibited good fluorescence property and presented higher T2 relaxivity(352 Fe mM1s1)than a commercial contrast agent Feridex(120 Fe mM1s1)at 1.5 *** alkylation degree of Alkyl-PEI-LAC-TPE effects the restriction of intramolecular rotation process of *** alkane chain grafting ratio aggravated the stack of TPE,increasing the fluorescence lifetime of Alkyl-PEI-LAC-TPE/SPIO ***-PEI-LAC-TPE/SPIO nanocomposites can effectively labelled HeLa cells and resulted in high fluorescence intensity and excellent MR imaging *** an MR/optical imaging probe,Alkyl-PEI-LAC-TPE/SPIO nanocomposites may be used in biomedical imaging for certain applications.

关键词： magnetic resonance imaging optical imaging superparamagnetic iron oxide aggregation-induced emission dual-mode imaging

Formation of Edge Crack in 1.4%Si Non-oriented Electrical Steel during Hot Rolling

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Journal of Iron and Steel Research International 2014年第2期21卷 269-274页

作者： ai-hua CHEN Hai-rong GUO hua-long LI Toshihiko EMI Institute of Research of Iron and Steel Shasteel

Microstructure evolution, dynamic recrystallization, high temperature oxidation and hot ductility of 1.4 % Si non-oriented electrical steel sheets were investigated to reduce edge cracking. The causes of cracking were found to be coarse as-cast microstructure, grain boundary oxidation in reheating furnace, lack of dynamic recrystallization during hot rolling and increase of temperature, resulting in reduced hot ductility in strip edge region. Countermeas- ures against the edge crack are proposed accordingly. Lowering reheating temperature and reducing holding time re- duced oxidation and decarburization. Hot charging temperature was increased to decrease reheating temperature. And using an edger can refine microstructure in strip edge region. Finally, edge heater can be added to increase edge re- gion formability by inducing dynamic reerystallization and ductility by increasing temperature.

关键词： edge crack non-oriented electrical steel hot rolling

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Structural Modal Parameter Recognition and Related Damage Identification Methods under Environmental Excitations: A Review

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Structural Durability & Health Monitoring 2025年第1期19卷 25-54页

作者： Chao Zhang Shang-Xi Lai hua-Ping Wang School of Civil Engineering and Mechanics Lanzhou UniversityLanzhou730000China Key Laboratory of Special Functional Materials and Structural Design Ministry of EducationLanzhou UniversityLanzhou730000China

Modal parameters can accurately characterize the structural dynamic properties and assess the physical state of the ***,it is particularly signiﬁcant to identify the structural modal parameters according to the monitoring data information in the structural health monitoring(SHM)system,so as to provide a scientiﬁc basis for structural damage identiﬁcation and dynamic model modiﬁ*** view of this,this paper reviews methods for identifying structural modal parameters under environmental excitation and brieﬂy describes how to identify structural damages based on the derived modal *** paper primarily introduces data-driven modal parameter recognition methods(e.g.,time-domain,frequency-domain,and time-frequency-domain methods,etc.),brieﬂy describes damage identiﬁcation methods based on the variations of modal parameters(e.g.,natural frequency,modal shapes,and curvature modal shapes,etc.)and modal validation methods(e.g.,Stability Diagram and Modal Assurance Criterion,etc.).The current status of the application of artiﬁcial intelligence(ai)methods in the direction of modal parameter recognition and damage identiﬁcation is further *** on the pre-vious analysis,the main development trends of structural modal parameter recognition and damage identiﬁcation methods are given to provide scientiﬁc references for the optimized design and functional upgrading of SHM systems.

关键词： Structural health monitoring data information modal parameters damage identiﬁcation ai method

6-DOF Motion Assessment of A Hydrodynamic Numerical Simulation of A Semisubmersible Platform Using Prototype Monitoring Data

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China Ocean Engineering 2022年第4期36卷 575-587页

作者： LI song WU Wen-hua YAO Wei-an Faculty of Vehicle Engineering and Mechanics Dalian University of TechnologyDalian 116024China State Key Laboratory of Structural Analysis of Industrial Equipment Dalian University of TechnologyDalian 116024China Research Institute of Dalian University of Technology in Shenzhen Gaoxin South fourth Road Nanshan DistrictShenzhen 518057China

Hydrodynamic numerical simulations are used to conduct structural analyses and inform the design of engineered marine *** this paper,a hydrodynamic numerical model of“Nanhai Tiaozhan”(NHTZ)FPS platform was established according to its design *** model was assessed with two sets of field monitoring data representing harsh and conventional sea *** motion responses of the platform according to the measured data and the hydrodynamic simulation were compared by reviewing their statistical characteristics,distributions,and spectrum *** comparison showed that the hydrodynamic model could correctly simulate the frequency domain characteristics of the motion responses of the ***,the simulation underestimated the reciprocating motions of the floating body and the influence of slow drift on the motion of the ***,analysis of the monitoring data revealed that the translational degrees of freedom(DOF)and rotational DOF of the platform were coupled,but these coupled motion states were not apparent in the hydrodynamic simulation.

关键词： prototype monitoring hydrodynamic numerical simulation statistical characteristics semisubmersible platform reciprocating motions

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Mutual-structure weighted guided image filtering for depth map restoration

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Optoelectronics Letters 2025年第1期21卷 51-56页

作者： LIU Zijian song Jian CHEN Quanmin XU Jiangtao Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology School of Microelectronics Tianjin University Spikesee Technology Co. Ltd.

Although guided image filtering(GIF) is known for preserving edges and fast computation, it may produce inaccurate outputs in depth map restoration. In this paper, a novel confidence-weighted GIF called mutual-structure weighted GIF(MSWGIF) is proposed, which replaces the mean filtering strategy in GIF during handling overlapping windows. The confidence value is composed of a depth term and a mutual-structure term, where the depth term is utilized to protect the edges of the output, and the mutual-structure term helps to select accurate windows during the structure characteristics of the guidance image are transferred to the output. Experimental results show that MSWGIF reduces the root mean square error(RMSE) by an average of 12.37%, and the average growth rate of correlation(CORR) is 0.07% on average. Additionally, the average growth rate of structure similarity index measure(SSIM) is 0.34%.

关键词： Wiener filtering

Diagnostics of Magnetic Field Strength in Gyrosynchrotron Radiation Regions for the Case of Transverse Propagation

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Chinese Physics Letters 2000年第12期17卷 927-928页

作者： ZHOU ai-hua WANG Xin-Dong Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008 National Astronomical Observatories Chinese Academy of SciencesBeijing 100012

A set of diagnostic formulas is,for the first time,proposed to deal with the magnetic field strength B in gy-rosynchrotron radiation regions for the transverse propagation *** diagnostic formulas of B are applied to analyze a solar limb *** differences of diagnostic results of B are compared for the different propagation cases and it is found that the differences are rather *** in the analysis of limb burst we should use the diagnostic formulas for the transverse propagation.

关键词： strength transverse propagation

Idiopathic mesenteric phlebosclerosis associated with long-term oral intake of geniposide

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World Journal of Gastroenterology 2021年第22期27卷 3097-3108页

作者： Yang Wen You-Wei Chen ai-Hong Meng Ming Zhao song-hua Fang Yan-Qing Ma Department of Radiology Zhejiang Provincial People's HospitalPeople's Hospital of Hangzhou Medical CollegeHangzhou 310014Zhejiang ProvinceChina Department of Gastroenterology Zhejiang Provincial People's HospitalPeople's Hospital of Hangzhou Medical CollegeHangzhou 310014Zhejiang ProvinceChina Department of Gastroenterology Hangzhou Yuhang District Hospital of Traditional Chinese MedicineHangzhou 311100Zhejiang ProvinceChina Department of Pathology Zhejiang Provincial People's HospitalPeople's Hospital of Hangzhou Medical CollegeHangzhou 310014Zhejiang ProvinceChina

BACKGROUND Idiopathic mesenteric phlebosclerosis(IMP)is a rare disease,and its etiology and risk factors remain *** To investigate the possible influence of Chinese herbal liquid containing geniposide on *** The detailed formula of herbal liquid prescriptions of all patients was studied,and the herbal ingredients were compared to identify the toxic agent as a possible etiological *** computed tomography(CT)and colonoscopy images were reviewed to determine the extent and severity of mesenteric phlebosclerosis and the presence of findings regarding *** disease CT score was determined by the distribution of mesenteric vein calcification and colon wall thickening on CT *** drinking index of medicinal liquor was calculated from the daily quantity and drinking years of Chinese medicinal ***,Spearman’s correlation analysis was conducted to evaluate the correlation between the drinking index and the CT disease *** The mean age of the 8 enrolled patients was 75.7 years and male predominance was found(all 8 patients were men).The patients had histories of 5-40 years of oral Chinese herbal liquids containing geniposide and exhibited typical imaging characteristics(e.g.,threadlike calcifications along the colonic and mesenteric vessels or associated with a thickened colonic wall in CT images).Calcifications were confined to the right-side mesenteric vein in 6 of the 8 patients(75%)and involved the left-side mesenteric vein of 2 cases(25%)and the calcifications extended to the mesorectum in 1 of *** thickening of colon wall mainly occurred in the right colon and the transverse *** median disease CT score was 4.88(n=7)and the median drinking index was 5680(n=7).After Spearman’s correlation analysis,the median CT score of the disease showed a significant positive correlation with the median drinking index(r=0.842,Paining geniposide

关键词： Idiopathic mesenteric phlebosclerosis Phlebosclerotic colitis Chinese herbal liquid Geniposide Colonoscopy Computed tomography

Synthesis of Silica Hollow Spheres with Diameter Around 50 nm by Anionic Surfactant

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Chemical Research in Chinese Universities 2012年第3期28卷 361-363页

作者： RAN hua HAN Lu CHE Shun-ai State Key Laboratory of Composite Materials Thin Film and Microfabrication Technology of Ministry of EducationSchool of Chemistry and Chemical TechnologyShanghai Jiaotong UniversityShanghai 200240P.R.China

Silica hollow spheres（SHSs） have attracted great attention because of their low toxicity, low density, large surface area, high chemical and thermal stability, and surface permeability. They can be widely applied in storage^[l], catalysis^[2], drug deli- very^[3,4], low-dielectric-constant materials^[5], low-refractive materials^[6-8], and so on. Up to now, there have been various methods to produce SHSs. Inorganic^[9] or organic particles^[10], such as polystyrene or calcium carbonate, were used as hard templates to create hollow cavities, However, the multistep synthetic process and the lack of structural robustness of the shells upon template removal process weaken their applica- tion. Soft templates, including oil-in-water emulsions^[11,12], vesicles^[13], micelle^[14,15] and gas bubbles^[16], are applied widely.

关键词： Anionic surfactant Co-Structure directing agent(CSDA) Vesicle

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De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第1期 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-song Yang Fu-Min Zhang ai-Jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

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