检索结果-内蒙古大学图书馆

Signal-domain speed-of-sound correction for ring-array-based photoacoustic tomography

Photoacoustics 2025年 44卷

作者： Daohuai Jiang Hengrong Lan Shangqing Tong Xianzeng Zhang Fei Gao Key Laboratory of Optoelectronic Science and Technology for Medicine Ministry of Education Fujian Provincial Key Laboratory for Photonics Technology Fujian Normal University Fuzhou 350117 China School of Biomedical Engineering Division of Life Sciences and Medicine University of Science and Technology of China Hefei Anhui 230026 China Hybrid Imaging System Laboratory Suzhou Institute for Advanced Research University of Science and Technology of China Suzhou Jiangsu 215123 China University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai China School of Engineering Science University of Science and Technology of China Hefei Anhui 230026 China

Photoacoustic imaging combines the advantages of optical and acoustic imaging, making it a promising tool in biomedical imaging. Photoacoustic tomography (PAT) reconstructs images by solving the inverse problem from detected photoacoustic waves to initial pressure map. The heterogeneous speed of sound (SoS) distribution in biological tissue significantly affects image quality, as uncertain SoS variations can cause image distortions. Previously reported dual-speed-of-sound (dual-SoS) imaging methods effectively address these distortions by accounting for the SoS differences between tissues and the coupling medium. However, these methods require recalculating the distribution parameters of the SoS for each frame during dynamic imaging, which is highly time-consuming and poses a significant challenge for achieving real-time dynamic dual-SoS PAT imaging. To address this issue, we propose a signal-domain dual-SoS correction method for PAT image reconstruction. In this method, two distinct SoS regions are differentiated by recognizing the photoacoustic signal features of the imaging target's contours. The signals are then corrected based on the respective SoS values, enabling signal-domain-based dual-SoS dynamic real-time PAT imaging. The proposed method was validated through numerical simulations and in-vivo experiments of human finger. The results show that, compared to the single-SoS reconstruction method, the proposed approach produces higher-quality images, achieving the resolution error by near 12 times and a 30 % increase in contrast. Furthermore, the method enables dual-SoS dynamic real-time PAT reconstruction at 10 fps, which is 187.22 % faster than existing dual-SoS reconstruction methods, highlighting its feasibility for dynamic PAT imaging of heterogeneous tissues.

关键词： Photoacoustic tomography Speed of sound Speed correction Image reconstruction

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Chaotic characteristics and attractor evolution of friction noise during friction process

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Friction 2018年第1期6卷 47-61页

作者： Cong DING Hua ZHU Guodong SUN Yuankai ZHOU Xue ZUO School of Mechatronic Engineering China University of Mining and Technology School of Mechanical Engineering Jiangsu University of Science and Technology Jiangsu Provincial Key Laboratory of Advanced Manufacturing for Marine Mechanical Equipment Jiangsu University of Science and Technology

Friction experiments are conducted on a ring-on-disk tribometer, and friction noise produced during the friction process is extracted by a microphone. The phase trajectory and chaotic parameters of friction noise are obtained by phase-space reconstruction, and its attractor evolution is analyzed. The results indicate that the friction noise is chaotic because the largest Lyapunov exponent is positive. The phase trajectory of the friction noise follows a "convergence-stability-divergence" pattern during the friction process. The friction noise attractor begins forming in the running-in process, and the correlation dimension D increases gradually. In the stable process, the attractor remains steady, and D is stable. In the last step of the process, the attractor gradually disappears, and D decreases. The friction noise attractor is a chaotic attractor. Knowledge of the dynamic evolution of this attractor can help identify wear state changes from the running-in process to the steady and increasing friction processes.

关键词： friction noise phase trajectory chaotic parameters Lyapunov exponent chaotic attractor

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Expert consensus on the diagnosis and treatment of solid tumors with BRAF mutations

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The Innovation 2024年第6期5卷 100-116页

作者： Wenxian Wang Bin Lian Chunwei Xu Qian Wang Ziming Li Nan Zheng Aijun Liu Jinpu Yu Wenzhao Zhong Zhijie Wang Yongchang Zhang Jingjing Liu Shirong Zhang Xiuyu Cai Anwen Liu Wen Li Lili Mao Ping Zhan Hongbing Liu Tangfeng Lv Liyun Miao Lingfeng Min Yu Chen Jingping Yuan Feng Wang Zhansheng Jiang Gen Lin Long Huang Xingxiang Pu Rongbo Lin Weifeng Liu Chuangzhou Rao Dongqing Lv Zongyang Yu Xiaoyan Li Chuanhao Tang Chengzhi Zhou Junping Zhang Junli Xue Hui Guo Qian Chu Rui Meng Xuewen Liu Jingxun Wu Rui Zhang Jin Zhou Zhengfei Zhu Yongheng Li Hong Qiu Fan Xia Yuanyuan Lu Xiaofeng Chen Jian Feng Rui Ge Enyong Dai Yu Han Weiwei Pan Fei Pang Xin Huang Meizhen Hu Qing Hao Kai Wang Fan Wu Binbin Song Bingwei Xu Liping Wang Youcai Zhu Li Lin Yanru Xie Xinqing Lin Jing Cai Ling Xu Jisheng Li Xiaodong Jiao Kainan Li Jia Wei Huijing Feng Lin Wang Yingying Du Wang Yao Xuefei Shi Xiaomin Niu Dongmei Yuan Yanwen Yao Jianhui Huang Yue Feng Yinbin Zhang Pingli Sun Hong Wang Mingxiang Ye Dong Wang Zhaofeng Wang Yue Hao Zhen Wang Bin Wan Donglai Lv Shengjie Yang Jin Kang Jiatao Zhang Chao Zhang Wenfeng Li Jianfei Fu Lizhi Wu Shijie Lan Juanjuan Ou Lin Shi Zhanqiang Zhai Yina Wang Bihui Li Zhang Zhang Ke Wang Xuelei Ma Zhongwu Li Zhefeng Liu Nong Yang Lin Wu Huijuan Wang Gu Jin Guansong Wang Jiandong Wang Hubing Shi Meiyu Fang Yong Fang Yuan Li Xiaojia Wang Jing Chen Yiping Zhang Xixu Zhu Yi Shen Shenglin Ma Biyun Wang Yong Song Zhengbo Song Wenfeng Fang Yuanzhi Lu Lu Si Department of Chemotherapy Chinese Academy of Sciences University Cancer Hospital(Zhejiang Cancer Hospital)HangzhouZhejiang 310022P.R.China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Melanoma and SarcomaPeking University Cancer Hospital&InstituteBeijing 100142P.R.China Institute of Cancer and Basic Medicine(ICBM) Chinese Academy of SciencesHangzhouZhejiang 310022P.R.China Department of Respiratory Medicine Affiliated Jinling HospitalMedical School of Nanjing UniversityNanjingJiangsu 210002P.R.China Department of Respiratory Medicine Affiliated Hospital of Nanjing University of Chinese MedicineJiangsu Province Hospital of Chinese MedicineNanjingJiangsu 210029P.R.China Department of Shanghai Lung Cancer Center Shanghai Chest HospitalShanghai Jiao Tong UniversityShanghai 200030P.R.China Beijing Key Laboratory of Mental Disorders National Clinical Research Center for Mental Disorders&National Center for Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing 200030China Advanced Innovation Center for Human Brain Protection Capital Medical UniversityBeijing 200030China Senior Department of Pathology the 7th Medical Center of PLA General HospitalBeijing 100700P.R.China Department of Cancer Molecular Diagnostics Core Tianjin Medical University Cancer Institute and HospitalTianjin 300060P.R.China Guangdong Lung Cancer Institute Guangdong Provincial Laboratory of Translational Medicine in Lung CancerGuangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesSchool of MedicineGuangzhouGuangdong 510080P.R.China State Key Laboratory of Molecular Oncology Department of Medical OncologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021P.R.China Department of Medical Oncology Lung Cancer and Gastrointestinal UnitHunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School

The BRAF gene is an important signaling molecule in human cells that is involved in the regulation of cell growth,differentiation,and *** the BRAF gene mutates,it can lead to abnormal activation of the signaling pathway,which promotes cell proliferation,inhibits cell apoptosis,and ultimately contributes to the occurrence and development of *** mutations are widely present in various cancers,including malignant melanoma,thyroid cancer,colorectal cancer,non-small cell lung cancer,and hairy cell leukemia,among *** is an important target for the treatment of various solid tumors,and targeted combination therapies,represented by BRAF inhibitors,have become one of the main treatment modalities for a variety of BRAF-mutation-positive solid tumors.

关键词： BRAF diagnosis treatment

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Optimizing Charge Separated Synergistic Binding Sites in Self-Healing Crystalline Porous Organic Salts for Benchmark Trace Alkyne/Alkene Separation

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Angewandte Chemie 2025年第24期137卷

作者： Yunjia Jiang Lingyao Wang Guolong Xing Changhong Liu Guangzu Xiong Danling Sun Jianbo Hu Weidong Zhu Zonglin Gu Banglin Chen Teng Ben Yuanbin Zhang Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials Science Zhejiang Normal University Jinhua 321004 P.R. China Institute of Advanced Fluorine-Containing Materials Zhejiang Normal University Jinhua 321004 China Research Center for New Materials Computing Zhejiang Lab Hangzhou 311100 P.R. China College of Physical Science and Technology Yangzhou University Yangzhou Jiangsu Province 225009 P.R. China Fujian Provincial Key Laboratory of Polymer Materials College of Chemistry & Materials Science Fujian Normal University Fuzhou 350007 P.R. China Jiangxi Provincial Key Laboratory of Functional Crystalline Materials Chemistry Jiangxi University of Science and Technology Ganzhou Jiangxi Province 341000 P.R. China

The separation of trace alkyne (C 2 H 2 /C 3 H 4 ) impurities from alkenes (C 2 H 4 /C 3 H 6 ) is a significant but challenging process to produce polymer-grade C 2 H 4 and C 3 H 6 . Herein, we reported an optimally designed charge-separated organic framework, crystalline porous organic salt (CPOS-1), with confined polar channels for highly efficient alkyne/alkene separation. CPOS-1 exhibits excellent stability, remarkably high C 2 H 2 (18.4 cm 3 g −1 ) and C 3 H 4 (20.9 cm 3 g −1 ) uptakes at 0.01 bar and 298 K, and benchmark C 2 H 2 /C 2 H 4 (25.1) and C 3 H 4 /C 3 H 6 (43.9) separation selectivities for 1/99 alkyne/alkene mixtures. The practical alkyne/alkene separation performance was completely identified by breakthrough-column experiments under various conditions with excellent cycle stability and high alkene productivities (C 2 H 4 : 216.6 L kg −1 ; C 3 H 6 : 162.4 L kg −1 ). Theoretical calculations indicated that pore aperture in CPOS-1 acts as a tailored single-molecule trap, where alkynes are captured by multiple synergistic electropositive and electronegative sites, thus enhancing alkyne recognition. Furthermore, the ease of rehealing facilitates its practical application, transcending the limitations of the metal-organic frameworks (MOFs) and covalent organic frameworks (COFs).

关键词： Alkyne/alkene separation Crystalline porous organic salts Non-covalent organic frameworks Self-rehealing frameworks Synergistic binding sites

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The New Era: Emerging Opportunities, Revolutionary Advances, and Challenges Ahead—The Future Road ofSensory Neuroscience

Sensory Neuroscience

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Sensory Neuroscience 2025年第1期1卷

作者： Renjie Chai Department of Otolaryngology Head and Neck Surgery Zhongda Hospital State Key Laboratory of Digital Medical Engineering Jiangsu Provincial Key Laboratory of Critical Care Medicine School of Life Sciences and Technology School of Medicine Advanced Institute for Life and Health Southeast University Nanjing China Department of Neurology Aerospace Center Hospital School of Life Science Beijing Institute of Technology Beijing China Co-Innovation Center of Neuroregeneration Nantong University Nantong China Institute of Neurology Sichuan Academy of Medical Sciences-Sichuan Provincial People’s Hospital School of Medicine University of Electronic Science and Technology of China Chengdu China Southeast University Shenzhen Research Institute Shenzhen China

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Corrigendum to “The second network of soft-nanoparticles in linear polymers of the same chemistry” [Polymer 283 (2023) 126216]

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Polymer 2023年 285卷

作者： Xikai Ouyang Jintian Luo Tao Li Yihui Zhu Wancheng Yu Jinlin He Pengfei Zhang GengXin Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials College of Material Science and Engineering Donghua University Shanghai 201620 China School of Chemistry and Chemical Engineering Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province Zhejiang Sci-Tech University Hangzhou 310018 China State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Soochow University Suzhou 215123 China College of Chemistry Chemical Engineering and Materials Science Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis Soochow University Suzhou Jiangsu 215123 China National Synchrotron Radiation Laboratory Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film CAS Key Laboratory of Soft Matter Chemistry University of Science and Technology of China Hefei 230026 China

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Angular filtering by volume Bragg grating in photothermorefractive glass for nanosecond laser pulse

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Chinese Optics Letters 2019年第4期17卷 15-18页

作者： Baoxing Xiong Fan Gao Xiang Zhang Xiao Yuan School of Optoelectronic Science and Engineering Soochow University Jiangsu Provincial Key Laboratory of Advanced Optical Manufacturing Technologies and Key Laboratory of Modern Optical Technologies of the Ministry of Education Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University

The two-dimensional angular filter based on volume Bragg gratings in photothermorefractive glass for a nanosecond(ns) laser pulse is demonstrated. The experimental results show that the near-field beam quality of the laser pulse was effectively improved. The near-field modulation and contrast ratio were improved by 1.75 and4.48 times, respectively. The power spectral density curves showed that the spatial frequencies more than0.9 mm^(-1)in the x direction and 1.2 mm^(-1)in the y direction were effectively suppressed.

关键词： two-dimensional angular Bragg gratings effectively suppressed

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A Strategy of Enhancing Polarization to Achieve Excellent Energy Storage Performance in Simple Bi0.5K0.5TiO3-Based Relaxors

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Angewandte Chemie 2025年

作者： Weiwei Cao Tianyi Sun Huajie Luo Tianyu Li Kaina Wang Kai Li Xingcheng Wang Chenjie Lou Na Wang Bing Xie Ji Zhang Matthew G Tucker Mingxue Tang Hui Liu Jun Chen School of Materials Science and Engineering & Key Laboratory of Advanced Materials and Devices for Post-Moore Chips Ministry of Education University of Science and Technology Beijing Beijing 100083 China Department of Physical Chemistry and Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083 China Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices Huizhou University Huizhou 516001 China Center for High Pressure Science and Technology Advanced Research Beijing 100193 China School of Materials Science and Engineering Nanchang Hangkong University Nanchang 330603 China School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing Jiangsu 210094 China Chemical and Engineering Materials Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA

Dielectric energy storage capacitors are indispensable components in advanced electronic and electrical systems. Excellent performance requires the dielectric materials possessing low residual polarization ( P r ), high breakdown strength ( E b ), and large maximum polarization ( P m ). The first two parameters can be typically achieved through chemical regulation, while the P max is closely related to the matrix. Theoretical calculations demonstrate that a strong coupling of A -O bonds and a large lattice can enhance polarization, thus identifying the prototype Bi 0.5 K 0.5 TiO 3 as a favorable matrix. Here, ultrahigh energy density of 16.5 J/cm 3 and high efficiency of 88.2 % are achieved in 0.76Bi 0.5 K 0.5 TiO 3 -0.24Ca 0.5 Sr 0.5 HfO 3 binary system. This system exhibits the highest comprehensive performance among all reported Bi 0.5 K 0.5 TiO 3 -based ceramics. The large perovskite framework facilitated by the large ionic radius of K + enhances the local polarity of Bi−O and Ca−O, resulting in a large P m of 57.4 μC/cm 2 under an ultrahigh E b of 82 kV/mm. The highly disordered local polar clusters at the nanoscale lead to negligible P r and high η . This work not only provides a unique design concept to enhance the comprehensive energy storage performance from the perspective of local structure, but also offers insight into the origin of high performance.

关键词： energy storage relaxor ferroelectric local structure dielectric capacitor

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Gelma-Mxene Hydrogel Nerve Conduits with Microgrooves for Spinal Cord Injury Repair

SSRN

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SSRN 2022年

作者： Cai, Jiaying Zhang, Hui Hu, Yangnan Huang, Zhichun Chen, Xiaoyan Guo, Jiamin Cheng, Hong Xia, Lin Zhang, Chen Wang, Huan Chai, Renjie State Key Laboratory of Bioelectronics Department of Otolaryngology Head and Neck Surgery Zhongda Hospital School of Life Sciences and Technology Advanced Institute for Life and Health Jiangsu Province High Tech Key Laboratory for Bio-Medical Research Southeast University Nanjing210096 China The Eighth Affiliated Hospital of Sun Yat-Sen University Shenzhen518033 China Department of Otolaryngology Head and Neck Surgery Affiliated Drum Tower Hospital of Nanjing University Medical School Nanjing210008 China Department of Otolaryngology Head and Neck Surgery Sichuan Provincial People's Hospital University of Electronic Science and Technology of China Chengdu610072 China Co-Innovation Center of Neuroregeneration Nantong University Nantong226001 China Institute for Stem Cell and Regeneration Chinese Academy of Science Beijing100086 China Beijing Key Laboratory of Neural Regeneration and Repair Capital Medical University Beijing100069 China

Repair of complete spinal cord injury (SCI) depends on microenvironment improvement and the reconnection between injured axons and regenerated neurons. Here, we fabricate a GelMA-MXene hydrogel nerve conduit with electrical conductivity and internal-facing longitudinal grooves and explore its function in SCI repair. It is found that the resultant grooved GelMA-MXene hydrogel could effectively promote the neural stem cells (NSCs) adhesion, directed proliferation and differentiation in vitro . Additionally, when the GelMA-MXene conduit loaded with NSCs (GMN) is implanted into the injured spinal cord site, effective repair capability for the complete transection of SCI was demonstrated. The GMN group shows remarkable nerve recovery and significantly higher BBB scores in comparison to the other groups. Therefore, GMN with a microgroove structure and loaded with NSCs is a promising strategy in treating SCI . © 2022, The Authors. All rights reserved.

关键词： Hydrogels

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Rapid preparation of graphene-skinned alumina fiber fabric and its electromagnetic interference shielding application

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Nano Research 2025年第5期18卷 1-11页

作者： Kangyi Zheng Chaojie Yu Wenjuan Li Fushun liang Longfei Liu Ruojuan Liu Hao Yuan Yuyao Yang Fan Yang Shuting Cheng Wenjing Jiang Qingxu Su Mengxiong Liu Yulin Han Xiaobai Wang Xiaoli Sun Yue Qi Zhongfan Liu 1College of Energy Soochow Institute for Energy and Materials Innovations (SIEMIS) Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies Soochow University Suzhou 215006 China 2Beijing Graphene Institute (BGI) Beijing 100095 China 3School of Physics and Electronics Shandong Normal University Jinan 250014 China 4Centre for Nanochemistry Beijing Science and Engineering Centre for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China 5Academy for Advanced Interdisciplinary Studies Peking University Beijing 100871 China 6Academy for Advanced Interdisciplinary Research North University of China Taiyuan 030051 China 7School of Population and Health Renmin University of China Beijing 100872 China 8Department of Chemistry School of Light Industry Science and Engineering Beijing Technology and Business University Beijing 100048 China

Direct growth of graphene on dielectric or insulating materials via chemical vapor deposition (CVD) offers a novel, transfer-free approach for various applications. However, challenges remain in growing graphene on non-catalytic substrates. In particular, the low growth rate of graphene remains a significant barrier to its large-scale production. In this study, propane (C 3 H 8 ) was used as the carbon source to prepare graphene on commercial alumina fiber fabric (AFF) via CVD, resulting in the synthesis of a novel material: graphene-skinned alumina fiber fabric (GAFF). Through comparative analysis of the graphene growth behaviors using C 3 H 8 and traditional carbon sources (CH 4 and C 2 H 4 ) on AFF, the growth mechanism of C 3 H 8 was elucidated. The pyrolysis of C 3 H 8 generates the unique carbon species C 3 H, which exhibits distinct advantages in terms of migration, nucleation, and growth on AFF. Graphene nucleation density using C 3 H 8 was found to be 160 times higher than that of CH 4 and 50 times higher than C 2 H 4 . The resulting GAFF exhibits a wide tunable electrical conductivity range (1 to 7000 Ω·sq −1 ), high tensile strength (> 170 MPa), lightweight properties, flexibility, and a hierarchical macrostructure. These characteristics make GAFF a promising candidate for various applications, including electromagnetic interference (EMI) shielding.

关键词： chemical vapor deposition (CVD) graphene-skinned alumina fiber fabric (GAFF) propane electromagnetic interference (EMI) shielding

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