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Wearable ultrasensitive and rapid human physiological monitoring based on microfiber Sagnac interferometer

Science China(Information Sciences) 2024年第3期67卷 281-290页

作者： xin WANG Hongyou ZHOU Meihua CHEN Yongcheng HE Zhishen ZHANG Jiulin gan Zhongmin YANG State Key Laboratory Luminescent Materials and Devices Institute of Optical Communication MaterialsSpecial Glass Fiber and Device Engineering Technology Research and Development Center of Guangdong ProvinceGuangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of Technology Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan University

High-sensitive and fast-responding flexible strain sensors are essential for the smart wearable devices that precisely and dynamically perceive the weak deformations induced by human physiological signals. Here, a flexible strain sensor via polydimethylsiloxane(PDMS)-encapsulated microfiber Sagnac interferometer was designed and prepared for monitoring the human pulse signals and sound vibrations. The sensor achieved a record-breaking sensitivity(gauge factor, GF = 9977) and an extremely low detection limit(0.00025%) due to the strong polarization-dependent coupling effect in the microfiber coupler and the polarization-mixing effect in the Sagnac loop. The relative intensity demodulation method also enabled a fast response time of 10 μs. The wearable pulse measurements were implemented by attaching this flexible strain sensor directly to human skin at various locations and the waveform details were accurately captured. Taking advantage of the ultra-high sensitivity and fast response performance of the prepared sensor, the real-time dynamic acquisition of the underwater weak signal, such as the hydro-acoustic waves with a wide range of 20 Hz–16.86 k Hz, has been demonstrated. These initial results pave the way for a new and innovative category of underwater wearable devices with rapid detection of human physiological signals and weak environmental vibrations.

关键词： flexible strain sensor microfiber Sagnac interferometer underwater detection

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Rational design of Ce-doped CdS/N-rGO photocatalyst enhanced interfacial charges transfer for high effective degradation of tetracycline

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Journal of Materials Science & Technology 2024年第6期173卷 137-148页

作者： Huijie Wang Yang Wan Binrong Li Jian Ye Jiahao gan Jiejing Liu xin Liu Xianghai Song Weiqiang Zhou xin Li Pengwei Huo Institute of Green Chemistry and Chemical Technology School of Chemistry&Chemical EngineeringJiangsu UniversityZhenjiang 212013China National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology School of Environmental Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009China Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China

The charge carrier separation efficiency and the adsorption capacity of the photocatalyst usually affect the degradation rate of ***,Cerium-doped leaf-like CdS(Ce-CdS)modified with ultrathin N-doped rGO(N-rGO)composites were successfully constructed(Ce-CdS/N-rGO)to investigate the removal efficiency of tetracycline(TC).X-ray photoelectron spectroscopy(XPS)and photoelectrochemical results revealed that Ce ions doped in CdS acting as the electron capture sites facilitated the interfacial charge *** calculation(DFT)results indicated that the interfacial effect between Ce-CdS and ultrathin N-rGO promoted the transfer of photogenerated electrons under the synergistic effect between the doping and interface modification *** optimized Ce5-CdS/N-rGO20 composites had the maximum TC removal capability(94.5%)and maintained a stable cycling *** addition,the adsorption-driven photocatalytic degradation pathway of TC was studied through mass spectrometry(MS)and in-situ Fourier transform infrared spectroscopy(in-situ FTIR).This study will provide an effective strategy for the construction of efficient photocatalytic composites for wastewater treatment.

关键词： Interfacial charges transfer Adsorption-driven photocatalytic degradation Synergistic effect Doping strategy Leaf-like CdS

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Research of simulation and experiment on arc characteristics of gas mechanical switch

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High Voltage 2024年第3期9卷 626-635页

作者： Cheng Jiang Lu Qu Zhangqing Yu Zhizheng gan xin yan Rong Zeng Yulong Huang Shaofu Li Department of Electrical Engineering Tsinghua UniversityBeijingChina School of Information Engineering Southwest University of Science and TechnologyMianyangChina Sichuan Energy Internet Research Institute Tsinghua UniversityChengduChina

An arc is the high-temperature discharge plasma produced in the opening process of mechanical switches,which directly affects the breaking capability of a hybrid DC circuit *** to the physical mechanism of an electric arc,the construction of an arc model for simulation analysis is an important technical means in the electrical *** this study,based on the theory of magneto hydrodynamics(MHD),a gas mechanical switch model of a natural commutation DC circuit breaker with a compound gap is *** arc motion process under different conditions is simulated and *** influence of different initial pressures,different opening speeds,and different striking currents on the arc voltage characteristics is *** results show that the larger the gas pressure,the smaller the arc volume and the higher the arc *** faster the opening speed,the longer the arc and the higher the arc voltage;with the increase of the current,the arc voltage increases rapidly at a low current,while the arc voltage increases slowly at a high current.

关键词： characteristics striking slowly

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Relationship between celiac artery variation and number of lymph nodes dissection in gastric cancer surgery

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World Journal of Gastrointestinal Oncology 2019年第6期11卷 499-508页

作者： Guang-Chuan Mu Yuan Huang Zhi-Ming Liu Zhi-Bai Chen Xiang-Hua Wu xin-gan Qin Yan-Jun Zeng Department of Gastrointestinal Surgery the First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Department of General Surgery the Second Affiliated Hospital of Guangxi Medical UniversityNanning 530000Guangxi Zhuang Autonomous RegionChina Biomechanics and Medical Information Institute Beijing University of TechnologyBeijing 100124China

BACKGROUND Radical D2 lymphadenectomy for advanced gastric cancer as a standard procedure has gained global consensus. Mounting studies have shown that the number of lymph nodes dissection directly affects the prognosis and recurrence of gastric cancer. Our previous study showed that there was no obvious lymph node around the abnormal hepatic artery derived from the superior mesenteric artery. AIM To investigate the relationship between celiac artery variation and the number of lymph nodes dissection in gastric cancer surgery. METHODS The clinicopathological data of 421 patients treated with radical D2 lymphadenectomy were analyzed retrospectively. The difference of the number of lymph nodes dissection between the celiac artery variation group and the normal vessels group and the relationship with prognosis were analyzed. RESULTS Celiac artery variation was found in 110 patients, with a variation rate of 26.13%. Celiac artery variation, tumor staging, and Borrmann typing were factors that affected lymph node clearance in gastric cancer, and the number of lymph nodes dissection in patients with celiac artery variation was significantly less than that of non-variant groups (P 0.05). Univariate and multiple Cox regression analysis showed that celiac artery variation was not a prognostic factor for gastric cancer (P > 0.05). Tumor staging, intraoperative bleeding, and positive lymph node ratio were prognostic factors for gastric cancer patients (all P < 0.05). CONCLUSION The number of lymph nodes dissection in patients with celiac artery variation was reduced, but there was no obvious effect on prognosis. Therefore, lymph nodes around the abnormal hepatic artery may not need to be dissected in radical D2 lymphadenectomy.

关键词： Gastric cancer Celiac artery variation Lymphadenectomy Number of lymph nodes Prognosis

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A New Combination of Mutated loxPs in a Vector for Construction of Phage Antibody Libraries

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Acta Biochimica et Biophysica Sinica 2005年第7期37卷 495-500页

作者： Yu gan~(1,2) xin-Tai ZHAO~2 1 Shanghai Medical College,Fudan University,Shanghai 200032,China 2 Laboratory for Cellular and Molecular Immunology,Cancer Institute,Shanghai Jiaotong University,Shanghai 200032,China Shanghai Medical College Fudan UniversityShanghai 200032 China Laboratory for Cellular and Molecular Immunology Cancer Institute Shanghai Jiaotong UniversityShanghai 200032 China

In the construction of large antibody libraries by in vivo recombination,two non-homogeneousloxP sites are required for the exchange of V genes between phagemids to create many new *** mutated loxP511 was designed not to recombine with the wild-type loxP （loxPwt） in early studies anda combination of the two has been used to construct antibody *** recent reports have shown thatrecombination occurs between loxPwt and *** suggests that the combinational use of loxP511and loxPwt might lead to the loss of the V gene diversity of antibody ***,it is necessary tofind a new combination of loxPs to avoid the excision recombination in the antibody *** this study,we found that the excision recombination between loxP511 and loxP2272,another mutated loxP sequence,was undetectable within one phagemid,while the excision recombination between loxP511 and loxPwtoccurred at a frequency of 40%.higher than that reported ***,the in vivo recombinationof different phagemids with loxP511 and loxP2272 showed that the V gene exchange was efficiently mediatedto produce new *** was concluded that the loxP511 and loxP2272 combination wasmore favorable for reducing the excision recombination and constructing large phage antibody libraries withhigh diversity.

关键词： mutated loxP excision recombination phage antibody library

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基于高校科技资源共享的青少年科技创新能力培养途径研究

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研究与发展管理 2014年第2期26卷 133-138页

作者：刘敢新重庆大学科技处重庆400044 重庆大学光电工程学院重庆400044

本文提出通过搭建高校科技教育资源共享平台,以高校科技教育团队和大学生科技社团作为其两翼,构建面向青少年科技创新人才培养的长效机制.基于由青少年群体到优异个体的递进发展模式,将提高青少年整体科学素质与培养科技创新人才相结合... 详细信息

本文提出通过搭建高校科技教育资源共享平台,以高校科技教育团队和大学生科技社团作为其两翼,构建面向青少年科技创新人才培养的长效机制.基于由青少年群体到优异个体的递进发展模式,将提高青少年整体科学素质与培养科技创新人才相结合,为青少年科技创新人才的成长提供一个便捷的上升通道.

关键词：高校人才培养科技资源共享

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Two-Parameter Vector-Valued Martingales and Geometrical Properties of Banach Spaces

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Wuhan University Journal of Natural Sciences 1999年第2期4卷 16-23页

作者： Cheng Ri-yan gan Shi-xin Wuhan University College of Mathamatical Sciences Wuhan China (GRID:grid.49470.3e) (ISNI:***)

We obtained a number of inequalities and laws of large numbers for two parameter vector valued *** the other direction we characterized p smoothness and q convexity of Banach spaces by using these inequali... 详细信息

关键词： two parameter vector valued martingle inequality law of large numbers p smoothness q convexity

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Genotypic Characterization of Methicillin-resistant Staphylococcus aureus Isolated from Pigs and Retail Foods in China

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Biomedical and Environmental Sciences 2017年第8期30卷 570-580页

作者： WANG Wei LIU Feng ZULQARNAIN Baloch ZHANG Cun Shan MA Ke PENG Zi xin YAN Shao Fei HU Yu Jie gan xin DONG Yin Ping BAI Yao LI Feng Qin YAN Xiao Mei MA Ai Guo XU Jin School of Public Health Qingdao University Key Laboratory of Food Safety Risk Assessment Ministry of Health China National Center for Food Safety Risk Assessment Pharmaceutical Department Qingdao Hiser Medical Center College of Veterinary Medicine South China Agricultural University Kuiwen District Center for Disease Control and Prevention 6. State Key Laboratory for Infectious Disease Prevention and Control National Institute for Communicable Disease Control and Prevention Chinese Center for Disease Control and Prevention

Objective To investigate the genotypic diversity of Methicillin-resistant Staphylococcus aureus(MRSA) isolated from pigs and retail foods from different geographical areas in China and further to study the routes and rates of transmission of this pathogen from animals to food. Methods Seventy-one MRSA isolates were obtained from pigs and retail foods and then characterized by multi-locus sequencing typing(MLST), spa typing, multiple-locus variable number of tandem repeat analysis(MLVA), pulsed-field gel electrophoresis(PFGE), and antimicrobial susceptibility testing. Results All isolated MRSA exhibited multi-drug resistance(MDR). Greater diversity was found in food-associated MRSA(7 STs, 8 spa types, and 10 MLVA patterns) compared to pig-associated MRSA(3 STs, 1 spa type, and 6 MLVA patterns). PFGE patterns were more diverse for pig-associated MRSA than those of food-associated isolates(40 vs. 11 pulse types). Among the pig-associated isolates, CC9-ST9-t899-MC2236 was the most prevalent clone(96.4%), and CC9-ST9-t437-MC621(20.0%) was the predominant clone among the food-associated isolates. The CC9-ST9 isolates showed significantly higher antimicrobial resistance than other clones. Interestingly, CC398-ST398-t034 clone was identified from both pig-and food-associated isolates. Of note, some community-and hospital-associated MRSA strains(t030, t172, t1244, and t4549) were also identified as food-associated isolates. Conclusion CC9-ST9-t899-MC2236-MDR was the most predominant clone in pigs, but significant genetic diversity was observed in food-associated MRSA. Our results demonstrate the great need for improved surveillance of MRSA in livestock and food and effective prevention strategies to limit MDR-MRSA infections in China.

关键词： Methicillin-resistant Staphylococcus aureus Antimicrobial susceptibility Genetic diversity Pig Retail food

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Alternative Splicing of OsCYL4 Controls Drought Resistance via Regulating Water Loss and Reactive Oxygen Species-Scavenging in Rice

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Rice science 2024年第1期31卷 1-5,I0001-I0008页

作者： SHA gan SHEN xin WU Zini XU Xiaocan XU xin TAN Yanping LIU xinqiong TANG Xianyin WANG Chuntai QIN Yonghua Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area College of Life SciencesSouth Central Minzu UniversityWuhan 430074China Huazhong Agricultural University Wuhan 430070China

A rice cyclase gene,OsCYL4b,identified as an alternative splice variant of the cyclase gene OsCYL4a,is involved in the regulation of drought stress and oxidative *** with OsCYL4a,OsCYL4b lacks the second exon,which is located in the conserved motif 3,and may be a functionally important *** results suggested that OsCYL4b was responsive to multiple abiotic stresses,and was localized to both the cytoplasm and plasma *** overexpression of OsCYL4b resulted in significantly enhanced drought and osmotic stress tolerance,reduced water loss,and increased abscisic acid(ABA)content compared with the wild type(WT).

关键词： drought Oxygen stress

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A scheduling algorithm for maximum throughput based on the link condition in heterogeneous network

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通讯和计算机（中英文版） 2007年第3期4卷 33-37页

作者： LIU gan ZHOU xin ZHU Guang-xi Wuhan Optical-electronic National Laboratory Department of Electronics ＆ Information Engineering Huazhong University of Science and Technology Wuhan 430074 China

Nowadays, a lot of wireless interfaces can be used by mobile users to access the Internet, such as WLAN, WiMAX, WIFI and even 3G. If a mobile terminal is equipped with multiple interfaces, it can use them simultaneously to improve the performance at the hot point where different RANs (Radio Access Networks) overlap. This paper proposes a scheduling algorithm based on the link condition that ensures the whole network has the maximum throughput. Simulation is also done to show the improvement of throughput with this scheduling algorithm.

关键词：网络调度算法最大吞吐量连接条件异类网络 RAN 无线接口移动用户

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