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Mortality weighting-based method for aggregate urban air risk assessment

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第9期12卷 702-709页

作者： Qing-yu ZHANG Guo-jin SUN Wei-li TIAN Yu-mei WEI Si-mai FANG jin-feng ruan Guo-rong SHAN Yao SHI Department of Environmental Engineering Zhejiang University Hangzhou 310058 China Department of Chemical Engineering Zhejiang University Hangzhou 310027 China Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control Hangzhou 311202 China College of Information University of International Business and Economic Beijing 100029 China

This paper deals with a mortality-weighted synthetic evaluation （MWSE） method for evaluating urban air risk. Sulphur dioxide （SO2）, nitrogen oxide （NOx）, and particulate matter （PMl0） were used as pollution indices. The urban area of Hangzhou, China is divided into 756 grid cells, with a resolution of 1 km× 1 km, and is evaluated using the MWSE and the air quality index （AQI）, a widely-used method to evaluate ambient air quality and air risk. In an evaluation of one day in April 2004, the surface areas categorized as levels Ⅰ and Ⅲ, as defined by the integrated air risk evaluation, were 27.3% and 3.3% lower, respectively, than grades Ⅰ and Ⅲ defined by the AQI evaluation. Meanwhile, the areas classified as level Ⅱ or above level Ⅲ by the integrated air risk evaluation were 55.1% and 101. 1% higher, respectively, than grade Ⅱ or above grade Ⅲ when using the AQI evaluation. From this comparison, we find that the MWSE method is more sensitive than the AQI method. The AQI method uses a single index to assess integrated air quality and is therefore unable to evaluate integrated air risks due to multiple pollutants. The MWSE method overcomes this problem, providing improved accuracy in air risk assessment.

关键词： Integrated air risk Mortality-weighted synthetic evaluation (MWSE) Air quality index (AQI) Air pollution

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Accurate quantification of the algebraic,multiplicative algebraic,and simultaneous iterative reconstruction techniques in ionosphere rebuilding based on the TIEGCM assessment

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Earth and Planetary Physics 2025年第1期9卷 117-126页

作者： Ao Qi HaiBing ruan Institute of Space Weather Nanjing University of Information Science and TechnologyNanjing 210044China Key Laboratory of Geospace Environment University of Science&Technology of ChinaChinese Academy of SciencesHefei 230026China

The algebraic reconstruction technique(ART),multiplicative algebraic reconstruction technique(MART),and simultaneous iterative reconstruction technique(SIRT)are computational methodologies extensively utilized within the field of computerized ionospheric tomography(CIT)to facilitate three-dimensional reconstruction of the ionospheric ***,reconstruction accuracy elicits recurrent disputes over its practical application,and people usually attribute this issue to incomplete and uneven coverage of the *** Thermosphere Ionosphere Electrodynamics General Circulation Model(TIEGCM)offers a reasonable physics-based ionospheric background and is widely utilized in ionospheric *** use the TIEGCM simulations as the targeted ionosphere because the current measurements are far from able to realistically reproduce the ionosphere in *** designations of satellite measurements are conducted to investigate the limiting performance of CIT methods in ionospheric *** to common practice,electron density distributions from outputs of the International Reference Ionosphere(IRI)model are used as the iterative initial value in CIT *** outcomes suggest that despite data coverage,iterative initial conditions also play an essential role in ionospheric *** particular,in the longitudinal sectors where the iterative initial height of the F2-layer peak electron density(hmF2)differs substantially from the background densities,none of the three CIT methods can reproduce the exact background *** hmF2 is close but the ionospheric F2-layer peak density(NmF2)is different between the targeted background and initial conditions,the MART performs better than the ART and SIRT,as evidenced by the correlation coefficients of MART being above 0.97 and those of ART and SIRT being below *** summary,this investigation reveals the potential uncertainties in traditional CIT reconstruction,particularly when reali

关键词： computerized ionospheric tomography International Reference Ionosphere model Thermosphere Ionosphere Electrodynamics General Circulation model ionosphere

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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

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Highly oxidized sesquiterpenoids from Parasenecio rubescens and assessment of their cytotoxicity

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Chinese Journal of Natural Medicines 2024年第11期22卷 1020-1029页

作者： jin An DUAN Fangfang ruan Hanli Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation School of PharmacyTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China School of Pharmaceutical Sciences Hunan University of MedicineHuaihua 418000China

A phytochemical investigation of the whole plant of Parasenecio rubescens(***)*** yielded 14 previ-ously undescribed,highly oxidized bisabolane-type sesquiterpenoids,named pararunines L-Y,along with one known oplopane-type *** structural elucidation of these compounds was accomplished through comprehensive spectroscopic analysis,in-cluding nuclear magnetic resonance(NMR)and high-resolution electrospray ionization mass spectrometry(HR-ESI-MS)*** by traditional uses and previous studies on this genus,all isolated compounds were subjected to in vitro cytotoxicity assays against four human cancer cell lines(MCF-7,Hela,HCT116,and HT-29).Considering that the reported chemical constituents of nu-merous other species within this genus primarily consist of eremophilane-type sesquiterpenoids,our findings not only expand the struc-tural diversity of bisabolane-type sesquiterpenoids but also contribute valuable scientific evidence to the chemotaxonomy of this genus.

关键词： Parasenecio rubescens Asteraceae Bisabolane-type sesquiterpenoids Oplopane-type sesquiterpenoid Cytotoxic activity

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Thermal hazard assessment of TKX-50-based melt-cast explosive

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Defence Technology（防务技术） 2022年第9期18卷 1546-1551页

作者： Jun-feng Wang Shu-sen Chen Shao-hua jin Qing-hai Shu feng-lei Huang Jian ruan Xiao Ma Kun Chen School of Materials Science and Engineering Beijing Institute of TechnologyBeijingChina State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijingChina Gansu Yinguang Chemical Industry Group Co.Ltd BaiyinChina

In the present study, thermal hazards of TNT and DNAN used as the molten binder in TKX-50-based meltcast explosives were comparatively studied through accelerating rate calorimeter(ARC) and Cook-off experiments. Two kinds of ARC operation modes were performed to investigate the thermal safety performance under adiabatic conditions(HWS mode) and constant heating(CHR mode). The obtained results demonstrated that at both heating modes, DNAN/TKX-50 outperformed TNT/TKX-50 from the thermal safety point of view. However, the sensitivity to heat of the samples was reverse because of the different heating modes. In addition, the results of thermal hazard assessment obtained from the cookoff experiment complied with ARC analysis which indicated the molten binder TNT replaced by DNAN would reduce the hazard of the TKX-50 melt cast explosive. Furthermore, the results of cook-off experiments also showed that DNAN/TKX-50 outperformed TNT/TKX-50 from the aspect of thermal stability, which was consistent with the result of CHR mode because of the similar heating process.

关键词： Dihydroxylammonium 5,5’-bistetrazole-1,1’-diolate(TKX-50) 2,4-Dinitroanisole(DNAN) Thermal safety performance Accelerating rate calorimeter(ARC) Cook-off

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MECHANISM RESEARCH FOR 3D NON-AXISYMMETRIC THIN-WALL TUBE OFFSET SPINNING

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Chinese Journal of Mechanical Engineering 2006年第2期19卷 217-222页

作者： KUANG Weihua XIA Qinxiang ruan feng　 Faculty of Material and Energy Guangdong University of TechnologyGuangzhou 510006 China College of Mechanical Engineering South China University of TechnologyGuangzhou 510640 China

Difference of offset spinning with conventional symmetric spinning is analyzed. A 3D FEM model for offset tube neck-spinning is established and the spinning process is simulated by means of ANSYS software. Dynamic boundary and contact problems in simulation are solved. Transient stress distribution of contact area, transient strain distribution of nodes in typical section and strain distribution of the workpiece at last are attained, the place and the cause of crack are analyzed. Strain variation curves with time of offset spinning and conventional spinning are compared. It shows the mechanism difference between offset spinning and conventional spinning. In addition, simulation results show how strain distribution of typical section, thickness of some typical nodes, axial extension in left section and force of three rollers change with time. According to the study of the variation curve, material flow law along radial, tangential and axial direction is attained and the whole spinning process is studied. The simulation results discover that offset distance is the key to manufacture offset non-symmetric tube, and process parameters change with spinning angle. Experiment data really reflect different process parameters＇ influence on conventional symmetric and offset spinning force. Experiments accord well with simulation.

关键词： Offset Symmetric Neck-spinning Simulation Mechanism

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Floor positioning method indoors with smartphone’s barometer

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Geo-Spatial Information Science 2019年第2期22卷 138-148,I0006页

作者： Min Yu feng Xue Chao ruan Hang Guo College of Computer Information and Engineering Jiangxi Normal UniversityNanchangChina Institute of Space Science and Technology Nanchang UniversityNanchangChina

This paper presents an indoor floor positioning method with the smartphone’s barometer for the purpose of solving the problem of low availability and high environmental dependence of the traditional floor positioning ***,an initial floor position algorithm with the“entering”detection algorithm has been ***,the user’s going upstairs or downstairs activities are identified by the characteristics of the air pressure ***,the moving distance in the vertical direction and the floor change during going upstairs or downstairs are estimated to obtain the accurate floor *** order to solve the problem of the floor misjudgment from different mobile phone’s barometers,this paper calculates the pressure data from the different cell phones,and effectively reduce the errors of the air pressure estimating the elevation which is caused by the heterogeneity of the mobile *** experiment results show that the average correct rate of the floor identification is more than 85%for three types of the cell phones while reducing environmental dependence and improving ***,this paper compares and analyzes the three common floor location methods–the WLAN Floor Location(WFL)method based on the fingerprint,the Neural Network Floor Location(NFL)methods,and the Magnetic Floor Location(MFL)method with our *** experiment results achieve 94.2%correct rate of the floor identification with Huawei mate10 Pro mobile phone.

关键词： Floor positioning smartphone’s barometer sensor calibration indoor location service

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Regulation of energy metabolism and maintenance of metabolic homeostasis:the adiponectin story after 20 years

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Journal of Molecular Cell Biology 2016年第2期8卷 91-92页

作者： Hong ruan feng Liu Department of Pharmacology University of Texas Health Science Center at San AntonioSan AntonioTX 78229USA Institute of Metabolismand Endocrinology Metabolic Syndrome Research CenterThe Second Xiangya HospitalCentral South UniversityChangsha 410011China

Thecurrent obesity epidemic andits major sequelae,including type 2 diabetes,atherosclerosis,and cardiovascular diseases,threaten human health,productivity,and life *** studies,which continue to further clarify themolecular basis of these diseases,aim to ultimately provide a path to better diagnoses and therapies for disease prevention and *** resistance is a defining feature of obesitylinked type 2 diabetes and nearly always coexists with reduced plasma adiponectin levels and a constellation of other abnormalities that increase the risks for cardio-and cerebro-vascular diseases.

关键词： metabolism homeostasis prevention

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Serologic status and safety of inactivated Covid-19 vaccine for hepatocellular carcinoma patients with cirrhosis after curative liver resection

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Cancer Communications 2023年第3期43卷 409-412页

作者： Fuchen Liu Xiaochen feng jin Du Minghao ruan Hui Liu The Third Department of Hepatic Surgery Eastern Hepatobiliary Surgery HospitalThird Affiliated HospitalSecond Military Medical UniversityNaval Medical UniversityShanghaiP.R.China

Dear Editor,Patients with hepatocellular carcinoma(HCC)usually have concomitant chronic liver diseases or cirrhosis,which contribute to a high risk of hepatic decompensation and increasedmortality following the coronavirus disease 2019(Covid-19)infection[1–3].Worldwide,approximately 54%of HCC cases are associated with hepatitis B virus(HBV)infection[1].Cirrhotic patients after curative hepatectomy for HBV-related HCC represent a special group of *** cirrhotic patients have low immunogenicity to Covid-19 vaccination and are recommended to be prioritized for it,the safety and immunogenicity have not been observed in cirrhotic patients with a history of hepatectomy for HCC[2–4].In this study,we explored the immunogenicity and safety after Covid-19 vaccination in patients with liver cirrhosis and a history of hepatectomy for HCC.

关键词： patients cirrhosis hepatocellular

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Multimodal Pretraining from Monolingual to Multilingual

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Machine Intelligence Research 2023年第2期20卷 220-232页

作者： Liang Zhang Ludan ruan Anwen Hu Qin jin School of Information Renmin University of ChinaBeijing 100872China

Multimodal pretraining has made convincing achievements in various downstream tasks in recent ***,since the majority of the existing works construct models based on English,their applications are limited by *** this work,we address this issue by developing models with multimodal and multilingual *** explore two types of methods to extend multimodal pretraining model from monolingual to ***,we propose a pretraining-based model named multilingual multimodal pretraining(MLMM),and two generalization-based models named multilingual CLIP(M-CLIP)and multilingual acquisition(MLA).In addition,we further extend the generalization-based models to incorporate the audio modality and develop the multilingual CLIP for vision,language,and audio(CLIP4VLA).Our models achieve state-of-the-art performances on multilingual vision-text retrieval,visual question answering,and image captioning *** on the experimental results,we discuss the pros and cons of the two types of models and their potential practical applications.

关键词： Multilingual pretraining multimodal pretraining cross-lingual transfer multilingual generation cross-modal retrieval

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