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Uniform perfectness of the attractor of bi-Lipschitz IFS

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Science China Mathematics 2006年第4期49卷 433-438页

作者： ruan Huojun SUN Yeshun yin Yongcheng Department of Mathematics Zhejiang University Hangzhou 310027 China Department of Mathematics Zhejiang University Hangzhou 310027 China Department of Mathematics Zhejiang University Hangzhou 310027 China

In this paper, we prove that the attractor of C1,a bi-Lipschitz IFS in R is uniformly perfect if it is not a singleton. Then we construct an example to show that this does not hold for C1 bi-Lipschitz IFS in Rn.

关键词： uniform perfectness, iterated function systems.

Porous Organic Cage‑Based Quasi‑Solid‑State Electrolyte with Cavity‑Induced Anion‑Trapping Effect for Long‑Life Lithium Metal Batteries

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Nano-Micro Letters 2025年第2期17卷 376-386页

作者： Wei-Min Qin Zhongliang Li Wen‑Xia Su Jia‑Min Hu Hanqin Zou Zhixuan Wu Zhiqin ruan Yue‑Peng Cai Kang Li Qifeng Zheng School of Chemistry South China Normal UniversityGuangzhou 510006People’s Republic of China Key Laboratory of Functional Metal‑Organic Compounds of Hunan Province College of Chemistry and Material ScienceHengyang Normal UniversityHengyang 421008People’s Republic of China Guangzhou Key Laboratory of Energy Conversion and Energy Storage Materials Guangzhou 510006People’s Republic of China

Porous organic cages(POCs)with permanent porosity and excellent host–guest property hold great potentials in regulating ion transport behavior,yet their feasibility as solid-state electrolytes has never been testified in a practical ***,we design and fabricate a quasi-solid-state electrolyte(QSSE)based on a POC to enable the stable operation of Li-metal batteries(LMBs).Benefiting from the ordered channels and cavity-induced anion-trapping effect of POC,the resulting POC-based QSSE exhibits a high Li+transference number of 0.67 and a high ionic conductivity of 1.25×10^(−4) S cm^(−1) with a low activation energy of 0.17 *** allow for homogeneous Li deposition and highly reversible Li plating/stripping for over 2000 *** a proof of concept,the LMB assembled with POC-based QSSE demonstrates extremely stable cycling performance with 85%capacity retention after 1000 ***,our work demonstrates the practical applicability of POC as SSEs for LMBs and could be extended to other energy-storage systems,such as Na and K batteries.

关键词： Porous organic cage Cavity-induced anion-trapping Quasi-solid-state electrolyte Homogeneous Li+flux Lithium metal battery

Two new flavanone glycosides from Macrothelypteris torresiana (Gaud.) Ching

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Chinese Chemical Letters 2009年第5期20卷 579-581页

作者： Wei Fu Wei Fang Jin lan ruan College of Pharmacy Tongji Medical Center Huazhong University of Science and Technology Wuhan 430030 China

Two new flavanone glycosides 1 and 2 were isolated from the aerial parts of Macrothelypteris torresiana （Gaud.） Ching. The structures of two products were identified as （2S）-5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O-β-D-6＂-O-acetylglucopyranoside and （2S）- 5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O-β-D-glucopyranoside on the basis of their chemical and spectral analysis, respectively.

关键词： Macrothelypteris torresiana (Gaud.) Ching Flavanone glycosides Spectral analysis

Laser direct writing of flexible multifunctional airflow sensors on the Kevlar fabric

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Nano Research 2025年第1期18卷 443-454页

作者： Wei Wang Zi-Qing Chen Yong-Qi Li Yu-Long Wang Mei-Chen Liu Yun-Bo ruan Yang Zhang Shu-Juan Liu Qiang Zhao College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Zhe Jiang Topsun Logistic Control CO. LTD.Yuhuan 317600China Department of Rehabilitation Medicine School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and RehabilitationNanjing University of Chinese MedicineNanjing 210023China

The growing interest in flexible devices has emerged as a global trend due to their advantages in flexibility,lightweight structure,and wearability,addressing the limitations of traditional *** wearable airflow sensors have been previously reported,the development of flexible fabric-based airflow sensors capable of functioning in environments with open flames—critical for fire rescue operations—has yet to be explored,largely due to the poor fire resistance of conventional *** this work,we first present a flexible,wearable,and multifunctional airflow sensor with excellent fire-resistant properties,fabricated through a simple direct laser writing *** sensor maintains airflow detection capabilities even in the presence of open ***,the fabrication of fabric-based sensors involves complex procedures such as carbon materials doping or vapor-phase deposition,leading to lengthy preparation cycles and high ***,fabric-based devices are inherently prone to *** address these challenges,we introduce twice-vertical laser-induced graphene(TVLIG)as a sensitive and reliable component for fire-resistant airflow *** resulting TVLIG/Kevlar fabric can be integrated into various garments,particularly protective suits,to form sensitive and fire-resistant airflow sensors capable of detecting airflow velocity and direction in both two-dimensional(2D)and three-dimensional(3D)spaces during fire ***,the TVLIG patterns can be expanded to multifunctional platforms,such as glucose detection for injured individuals,offering further applications in rescue *** functional expansion reduces the burden on rescue personnel and streamlines device *** its outstanding sensing capabilities,fire resistance,and expandability,the developed flexible airflow sensor shows great potential for various real-world rescue scenarios,promising advancements in wearable sensing technology for rescue enginee

关键词： flexible airflow sensor direct laser writing twice-vertical laser-induced graphene fire accident rescue Kevlar fabric

Bioaugmentation and quorum sensing disruption as solutions to increase nitrate removal in sequencing batch reactors treating nitrate-rich wastewater

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Journal of Environmental Sciences 2020年第12期32卷 179-185页

作者： Xinyi ruan Jun yin Xueyan Cui Na Li Dongsheng Shen School of Environmental Science and Engineering Zhejiang Gongshang UniversityHangzhou 310012PR China Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling Hangzhou 310012PR China

Bioaugmentation of denitrifying bacteria can serve as a promising technique to improve nutrient removal during wastewater treatment. While denitrification inhibition by bacterial quorum sensing(QS) in Pseudomonas aeruginosa has been indicated, the application of bacterial QS disruption to improve nitrate removal from wastewater has not been investigated. In this study, the effect of bioaugmentation of P. aeruginosa SD-1 on nitrate removal in sequencing batch reactors that treat nitrate rich wastewater was assessed. Additionally, the potential of a quorum sensing inhibitor(QSI) to improve denitrification following bacterial bioaugmentation was evaluated. Curcumin, a natural plant extract, was used as a QSI. The chemical oxygen demand(COD) and initial nitrate concentration of the influent were 700 ±20 mg/L and 200 ±10 mg/L respectively, and their respective concentrations in the effluent were 56.9 ±3.2 mg/L and 9.0 ±3.2 mg/L. Thus, the results revealed that bioaugmentation of P. aeruginosa SD-1 resulted in an increased nitrate removal to 82% ±1%. Further, nitrate was almost completely removed following the addition of the QSI, and activities of nitrate reductase and nitrite reductase increased by 88% ±2% and 74% ±2% respectively. The nitrogen mass balance indicated that aerobic denitrification was employed as the main pathway for nitrogen removal in the reactors. The results imply that bioaugmentation and modulation of QS in denitrifying bacteria, through the use of a QSI, can enhance nitrate removal during wastewater treatment.

关键词： Bioaugmentation Denitrification Nitrate removal Quorum sensing inhibitor Curcumin

Prediction of peritoneal free cancer cells in gastric cancer patients by golden-angle radial sampling dynamic contrast-enhanced magnetic resonance imaging

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第7期25卷 617-627页

作者： Xueqing yin Xinzhong ruan Yongmeng ZHU Yongfang yin Rui HUANG Chao LIANG The First Affiliated Hospital of Ningbo University Ningbo 315000China Ningbo Medical Center Lihuili Hospital Ningbo 315000China

Objectiveperitoneal free cancer cells can negatively impact disease progression and patient outcomes in gastric cancer. This study aimed to investigate the feasibility of using golden-angle radial sampling dynamic contrast-enhanced magnetic resonance imaging (GRASP DCE-MRI) to predict the presence of peritoneal free cancer cells in gastric cancer *** enrolled patients were consecutively divided into analysis and validation groups. Preoperative magnetic resonance imaging (MRI) scans and perfusion were performed in patients with gastric cancer undergoing surgery, and peritoneal lavage specimens were collected for examination. Based on the peritoneal lavage cytology (PLC) results, patients were divided into negative and positive lavage fluid groups. The data collected included clinical and MR information. A nomogram prediction model was constructed to predict the positive rate of peritoneal lavage fluid, and the validity of the model was verified based on data from the verification *** was no statistical difference between the proportion of PLC-positive cases predicted by GRASP DCE-MR and the actual PLC test. MR tumor stage, tumor thickness, and perfusion parameter Tofts-Ketty model volume transfer constant (Ktrans) were independent predictors of positive peritoneal lavage fluid. The nomogram model featured a concordance index (C-index) of 0.785 and 0.742 for the modeling and validation groups, *** DCE-MR could effectively predict peritoneal free cancer cells in gastric cancer patients. The nomogram model constructed using these predictors may help clinicians to better predict the risk of peritoneal free cancer cells being present in gastric cancer patients.

关键词： Gastric cancer Magnetic resonance Golden-angle radial sampling Nomogram model Peritoneal free cancer cells

Particle identification using CsI(Tl) crystal with three different methods

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Nuclear Science and Techniques 2008年第6期19卷 354-357页

作者： lan Changlin ruan Xichao LIU Gang KONG Xiangzhong ZHOU Zuying School of Nuclear Science ＆ Technology Lanzhou University Lanzhou 730000 China Department of Nuclear Physics China Institute of Atomic Energy Beijing 102413 China

Three pulse-shape-discrimination (PSD) methods are applied to study the particle identification (PID) by using CsI(Tl) crystal, especially for identifying light charged particles. The zero-cross time method, fast and total component method and signal rise time method are used. The experiment, data analysis and results are compared. Good PID for p, α and γ can be achieved with a CsI(Tl)-photomultiplier assembly.

关键词： CsI(Tl)晶体 PID PSD 原子核核技术

Social Network Analysis of a Norovirus Outbreak at a Primary School — Zhuhai City, Guangdong Province, China, 2023

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China CDC weekly 2024年第44期6卷 1142-1146,I0001,I0002页

作者： Xiling yin Songjian Xiao Xuebao Zhang Feng ruan Department of Health Emergency Management Center for Disease Control and Prevention of Zhuhai CityZhuhai CityGuangdong ProvinceChina

What is already known about this topic?The investigations and analyses limited to epidemiological characteristics are insufficient to analyze the spread patterns of norovirus outbreaks in *** is added by this report?Norovirus outbreaks in primary schools are a dynamic process that spreads through social *** use of a social network analysis method to measure and identify key nodes for simulating control evolution was proven *** are the implications for public health practice?Infected students exhibit priority connection characteristics at different developmental stages in the network *** and deliberately targeting key nodes could destroy network connectivity and help reduce the spread of the outbreak.

关键词： network spread schools

Jiedu Recipe,a compound Chinese herbal medicine,inhibits cancer stemness in hepatocellular carcinoma via Wnt/β-catenin pathway under hypoxia

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Journal of Integrative Medicine 2023年第5期21卷 474-486页

作者： Bing-jie Guo Yi ruan Ya-jing Wang Chu-lan Xiao Zhi-peng Zhong Bin-bin Cheng Juan Du Bai Li Wei Gu Zi-fei yin School of Traditional Chinese Medicine Naval Medical UniversityShanghai 200433China Department of Gastroenterology Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200433China PLA Naval Medical Center Shanghai 200052China Department of Traditional Chinese Medicine the 920th Hospital of Joint Logistics Support ForceKunming 650000Yunan ProvinceChina Department of Rehabilitation Changhai HospitalNaval Medical UniversityShanghai 200433China

Objective Jiedu Recipe(JR),a Chinese herbal remedy,has been shown to prolong overall survival time and decrease recurrence and metastasis rates in patients with hepatocellular carcinoma(HCC).This work investigated the mechanism of JR in HCC *** The chemical constituents of JR were detected using liquid chromatography-mass *** potential anti-HCC mechanism of JR was screened using network pharmacology and messenger ribonucleic acid(mRNA)microarray chip assay,followed by experimental validation in human HCC cells(SMMC-7721 and Huh7)in vitro and a nude mouse subcutaneous transplantation model of HCC in *** cell characteristics of proliferation,migration and invasion under hypoxic setting were investigated using thiazolyl blue tetrazolium bromide,wound healing and Transwell assays,***-i^(TM)Hypoxia Reagent was added to reveal hypoxic *** cell sphere formation assay was used to detect the ***-mesenchymal transition(EMT)markers like E-cadherin,vimentin andα-smooth muscle actin,and pluripotent transcription factors including nanog homeobox,octamer-binding transcription factor 4,and sex-determining region Y box protein 2 were analyzed using Western blotting and real-time polymerase chain *** blot was performed to ascertain the anti-HCC effect of JR under hypoxia involving the Wnt/β-catenin *** According to network pharmacology and mRNA microarray chip analysis,JR may potentially act on hypoxia and inhibit the Wnt/β-catenin *** vitro and in vivo experiments showed that JR significantly decreased hypoxia,and suppressed HCC cell features of proliferation,migration and invasion;furthermore,the hypoxia-induced increases in EMT and stemness marker expression in HCC cells were inhibited by *** based on the co-administration of JR and an agonist(LiCl)or inhibitor(IWR-1-endo)verified that JR suppressed HCC cancer stem-like properties under hypoxia by blocking the Wnt/β-ca

关键词： Jiedu Recipe Chinese medicine Hepatocellular carcinoma Hypoxia Cancer stemness Wnt/β-cateninpathway