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Customisable sound absorption properties of functionally graded metallic foams

Journal of Materials Science & Technology 2022年第13期108卷 196-207页

作者： Jun Wei Chua Xinwei li Tao li Beng Wah Chua Xiang yu Wei Zhai Department of Mechanical Engineering National University of Singapore117575Singapore Agency for Science Technology and Research(A^(*)STAR)Singapore Institute of Manufacturing Technology138634Singapore Agency for Science Technology and Research(A^(*)STAR)Engineering MechanicsInstitute of High-Performance Computing1 Fusionopolis Way138632Singapore

In this study,functionally graded foam made of Inconel 625 superalloy was successfully produced using the template replication method,with open-cell polyurethane foams as a *** products have a similar pore morphology as the templates and adjacent layers were successfully sintered together by particle *** absorption experiments on graded metallic foams reveal that the sound absorption at particular frequency ranges can be improved by various permutations of foam *** graded foam of two distinct pore sizes,a mathematical equation was proposed to predict the location of the intersection point of the sound absorption curves,thereby aiding in graded foam *** increase in sound absorption coefficients by resonance-like effects can be introduced before the intersection points by placing the foam layer of smaller pore size nearer to the sound *** sound absorption performances can be further customized when the thickness proportion of the pore sizes is changed and when the number of distinct pore sizes used is *** sound absorption performance at lower frequencies is generally boosted by resonance-like effects when the layer of foam with the largest pore size is placed furthest from the sound *** the same composition of foam with a fixed thickness proportion of pore sizes,one can introduce resonance-like effects to improve the sound absorption performance compared to other permutations while possibly satisfying weight requirements in practical *** study provides valuable insights and mathematical guidelines in the design and manufacturing of functionally graded metallic foam for specific applications.

关键词： Template replication method Functionally graded foam Sound absorption Transfer matrix method Composite metal foam

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Synthesis and Characterization of Hollow Strontium Carbonate Pompons by Composite Soft Template Method

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1434-1439页

作者： li Bibo DONG Xiufang li yu SONG Jian XIE Wuxi ZHANG Wei liU yunfei School of Environment and Safety Engineering North University of ChinaTaiyuan 030051China School of Chemical Engineering and Technology North University of ChinaTaiyuan 030051China Xi'an Modern Chemistry Research Institute Xi'an 710065China

The hollow strontium carbonate pompons was synthesized for the first time by a controlled reaction precipitation method with sodium dodecyl benzene sulfonate(SDBS)and polyvinyl pyrrolidone(PVP)work together as *** sampled particles were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),nitrogen adsorption-desorption measurement,X-ray diffraction(XRD),Energy dispersive X-Ray spectroscopy(EDX),Fourier transform infrared spectroscopy(FTIR),Thermogravimetric analysis and differential scanning calorimetry(TGA-DSC),*** is shown that the assynthesized hollow strontium carbonate pompons with the size of about 2μm consist of flake-like particles under the optimal reaction *** formation mechanism of hollow strontium carbonate pompons was preliminarily explored.

关键词： strontium carbonate hollow structure pompons composite soft template method

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A New Kind of Biomaterials—Bullfrog Skin Collagen

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Chinese Chemical Letters 2003年第11期14卷 1146-1149页

作者： He li Bai ling liU Hua lin CHEN li Zhen GAO Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChengdu 610041

Pepsin-soluble collagen was prepared from bullfrog skin and partially characterized. This study revealed interesting differences, such as molecular weight, amino acid composition, denaturation temperature (Td), in the frog skin collagen when compared to the known vertebrate collagens. This study gives hints that bullfrog skin can be a potential, safe alternative source of collagen from cattle for use in various fields.

关键词： Bullfrog skin collagen denaturation temperature.

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Graphite Anode for Potassium Ion Batteries: Current Status and Perspective

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Energy & Environmental Materials 2022年第2期5卷 458-469页

作者： Xiaodan li Jinliang li liang Ma Caiyan yu Zhong Ji likun Pan Wenjie Mai Department of Physics Siyuan LaboratoryGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsJinan UniversityGuangzhou 510632China nternational Joint Laboratory of Renewable Energy Materials and Devices of Henan Province School of Physics&ElectronicsHenan UniversityKaifeng 475004China Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062China

With the increased demand from the storage of renewable energy sources,some safe and inexpensive energy storage technologies instead of li-ion batteries become urgently ***,K-ion batteries(KIBs)have attracted much attention and evolved significant development because of the low price,safety,and similar property compared with li-ion *** to the high reversibility,stability,and low potential plateau,graphite becomes a current research focus and is regarded as one of the most promising KIB’s anode *** this review,we mainly discuss the electrochemical reaction mechanism of graphite during potassiation-depotassiation process and analyze the effects of electrode/electrolyte interface on graphite for Kion ***,we summarize several kinds of methods to improve the performance of graphite for KIBs,including the design of graphite structure,selection of appropriate binder,solvent chemistry,and salt ***,a concept of“relative energy density”is raised,which can be more accurate to evaluate the genuine electrochemical performance of graphite anode involving the specific capacity and *** addition,we also summarize the considerable challenges to current graphite anode in KIBs and we believe our work will offer alterative solutions to further explore high-performance graphite anode of K-ion storage.

关键词： electrochemical reaction mechanism graphite anode K-ion batteries methods to improve performance

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Identification of susceptibility loci and relevant cell type for IgA nephropathy in Han Chinese by integrative genome-wide analysis

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Frontiers of Medicine 2024年第5期18卷 862-877页

作者： Ming li Xingjie Hao Dianchun Shi Shanshan Cheng Zhong Zhong Lu Cai Minghui Jiang lin Ding Lanbo Ding Chaolong Wang Xueqing yu Department of Nephrology Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China Department of Nephrology The First Affiliated HospitalSun Yat-sen UniversityGuangzhou 510080China Guangdong-Hong Kong Joint Laboratory on Immunological and Genetic Kidney Diseases Guangzhou 510080China Department of Epidemiology and Biostatistics Ministry of Education Key Laboratory of Environment and HealthSchool of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China NHC Key Laboratory of Nephrology(Sun Yat-sen University) and Guangdong Provincial Key Laboratory of NephrologyGuangzhou 510080China

Although many susceptibility loci for IgA nephropathy(IgAN)have been identified,they only account for 11.0%of the overall IgAN *** performed a large genome-wide meta-analysis of IgAN in Han Chinese with 3616 cases and 10417 controls to identify additional genetic loci of *** that inflammatory bowel disease(IBD)and asthma might share an etiology of dysregulated mucosal immunity with IgAN,we performed cross-trait integrative analysis by leveraging functional annotations of relevant cell type and the pleiotropic information from IBD and *** 8669456 imputed variants,we identified a novel locus at 4p14 containing the long noncoding RNA *** type enrichment analysis based on annotations suggested that PMA-I-stimulated CD4+CD25–IL17+Th17 cell was the most relevant cell type for IgAN,which highlights the essential role of Th17 pathway in the pathogenesis of ***,we identified six more novel loci associated with IgAN,which included three loci showing pleiotropic effects with IBD or asthma(2q35/PNKD,6q25.2/SCAF8,and 22q11.21/UBE2L3)and three loci specific to IgAN(14q32.32/TRAF3,16q22.2/TXNL4B,and 21q21.3/linC00113)in the pleiotropic *** findings support the involvement of mucosal immunity,especially T cell immune response and IL-17 signal pathway,in the development of IgAN and shed light on further investigation of IgAN.

关键词： IgA nephropathy(IgAN) genome-wide association study(GWAS) relevant cell types integrative analysis pleiotropy

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Population mobility change for controlling the transmission of COVID-19:mobile phone data analysis in nine cities of China

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Geo-Spatial Information Science 2023年第4期26卷 627-641页

作者： Jizhe Xia Taicheng li Zhaoyang yu Erzhen Chen Yang yue Zhen li Ying Zhou Shenzhen Key Laboratory of Spatial Smart Sensing and Service Guangdong Key Laboratory of Urban InformaticsGuangdong–Hong Kong-Macao Joint Laboratory for Smart CitiesMinistry of Natural Resources(MNR)Key Laboratory for Geo-Environmental Monitoring of Great Bay AreaSchool of Architecture and Urban PlanningShenzhen UniversityShenzhenChina Ruijin Hospital School of MedicineShanghai Jiao Tong UniversityShanghaiChina Wenzhou Institute of Geotechnical Investigation and Surveying WenzhouChina

Mobility restriction measures were the main tools to control the spread of COVID-19,but the extent to which the mobility has decreased remained *** investigated the change in local population mobility and its correlation with COVID-19 infections,using 1185 billion aggregated mobile phone data records in nine main cities in China from 10 January to 24 February *** mobility fell by as much as 79.57%compared to the normal days in 2020 and by 58.13%compared to the same lunar period in *** daily incidence of COVID-19 was significantly correlated with local daily mobility(R2=0.77,Plined by 3%when mobility was reduced by 10%in the GLM analysis(Plity level,driven by a mixture effect of holiday and public health interventions,could substantially reduce the transmission of COVID-19 to a low *** study could provide evidence of mobility restriction to control local transmission for other places facing COVID-19 outbreaks or potential next waves.

关键词： COVID-19 mobile phone population mobility local transmission

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Diagnosis and spontaneous healing of asymptomatic renal allograft extra-renal pseudo-aneurysm:A case report

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World Journal of Clinical Cases 2021年第16期9卷 3943-3950页

作者： Rui-Fang Xu En-Hui He Zhan-Xiong Yi li li Jun lin lin-Xue Qian Department of Ultrasound Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Department of Urology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China

BACKGROUND Transplant renal artery stenosis is a relatively frequent vascular complication after ***,extra-renal pseudo-aneurysms(EPSAs)are rare after transplantation;they can be life-threatening and usually need open surgical *** discuss the diagnosis and spontaneous healing of an asymptomatic renal allograft EPSA caused by renal artery anastomotic stenosis,which was diagnosed in a timely manner and managed by conservative *** SUMMARY We present a 37-year-old male patient diagnosed with a renal allograft EPSA caused by renal artery anastomotic stenosis due to multiple atherosclerotic plaques with ultrasonographic examination 6 mo post *** stenosis rate of 90%and the EPSA were verified by computed tomography *** diagnosis was further confirmed with digital subtraction *** transluminal angiography was conducted,and a metallic stent was successfully implanted at the stenosed site of the main renal artery *** further intervention for the EPSA was undertaken due to the difficulty of stenting and the risk of bleeding;regular ultrasonographic follow-ups were *** stenosis was significantly relieved immediately after stent implantation and the EPSA was healed spontaneously by completely filling with hypo-echoic thrombosis 8 mo after *** Ultrasonography combined with a high-frequency linear probe can detect vascular complications post renal transplantation at an early stage and improve prognosis.

关键词： Renal transplantation Renal artery stenosis Pseudo-aneurysm Ultrasonography Vascular complications Case report

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Temporal assembly patterns of microbial communities in three parallel bioreactors treating low-concentration coking wastewater with differing carbon source concentrations

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Journal of Environmental Sciences 2024年第3期137卷 455-468页

作者： Weijia li yu Xia Na li Jie Chang Jing liu Pei Wang Xuwen He School of Chemical and Environmental Engineering China University of Mining and Technology-BeijingBeijing 100083China

Carbon source is an important factor of biological treatment systems, the effects of which on their temporal community assembly patterns are not sufficiently understood *** this study, the temporal dynamics and driving mechanisms of the communities in three parallel bioreactors for low-concentration coking wastewater(CWW) treatment with differing carbon source concentrations(S0 with no glucose addition, S1 with 200 mg/L glucose addition and S2 with 400 mg/L glucose addition) were comprehensively studied. Highthroughput sequencing and bioinformatics analyses including network analysis and Infer Community Assembly Mechanisms by Phylogenetic bin-based null model(iCAMP) were used. The communities of three systems showed turnover rates of 0.0029~0.0034 every 15days. Network analysis results showed that the S0 network showed higher positive correlation proportion(71.43%) and clustering coefficient(0.33), suggesting that carbon source shortage in S0 promoted interactions and cooperation of microbes. The neutral community model analysis showed that the immigration rate increased from 0.5247 in S0 to 0.6478in S2. The iCAMP analysis results showed that drift(45.89%) and homogeneous selection(31.68%) dominated in driving the assembly of all the investigated microbial *** contribution of homogeneous selection increased with the increase of carbon source concentrations, from 27.92% in S0 to 36.08% in S2. The OTUs participating in aerobic respiration and tricarboxylic acid(TCA) cycle were abundant among the bins mainly affected by deterministic processes, while those related to the metabolism of refractory organic pollutants in CWW such as alkanes, benzenes and phenols were abundant in the bins dominated by stochastic processes.

关键词： Coking wastewater treatment Temporal dynamics Network analysis Deterministic processes Stochastic processes

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Water modeling on fluid flow and mixing phenomena in a BOF steelmaking converter

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Journal of Iron and Steel Research International 2024年第3期31卷 595-607页

作者： Xin-yu Cai Hao-jian Duan Ding-han li Anjun Xu li-feng Zhang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing 100083China School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

A 1∶8 physical water model was constructed to investigate the fluid flow and mixing phenomena in the basic oxygen furnace(BOF)*** particle image velocimetry was employed to measure the velocity distribution of the bath and the high-speed camera was applied to capture the cavity shape in the combined blowing BOF *** mixing time for varied operating conditions was measured by the stimulus-response *** cavity depth increased with the decrease in the lance height and the increase in the top gas flow rate while the bottom blowing gas had little influence on the cavity *** minimum cavity depth was obtained under the condition of a 69.8 m^(3)/h top gas flow rate,a 287.5 mm lance height and a 0.93 m^(3)/h bottom blowing gas flow rate,which was 161.2 *** mixing time decreased as the lance height decreased and the top blowing gas flow rate *** mixing time was first decreased and then increased with the increase in the bottom gas flow *** the condition of 69.8 m^(3)/h gas flow rate of top blowing,the 287.5 mm lance height and the 0.93 m^(3)/h gas flow rate of bottom blowing,the mixing time in the converter was 48.65 *** empirical formula between the stirring power and the mixing time in the converter was calculated.

关键词： Water model Fluid flow Particle image velocimetry Mixing time BOF converter

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Diagnosis and treatment of Whipple disease after kidney transplantation:A case report

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World Journal of Clinical Cases 2023年第25期11卷 6019-6024页

作者： Qian Chen yu-lin Niu Tao Zhang Department of Organ Transplantation Affiliated Hospital of Guizhou Medical UniversityGuiyang 550000Guizhou ProvinceChina

BACKGROUND Kidney transplantation is the standard treatment for end-stage renal ***,rare and specific pathogenic infections which are asymptomatic are often difficult to diagnose,causing delayed and ineffective treatment and thus seriously affecting *** whipplei(***)is a Gram-positive actinomycete widely found in soil,sewage,and other external environments and is present in the population as an asymptomatic *** is relatively little documented research on *** in renal transplant patients,and there are no uniform criteria for treating this group of post-transplant *** article describes the treatment of a 42-year-old individual with post-transplant *** infection following kidney *** SUMMARY To analyze clinical features of Whipple’s disease and summarize its diagnosis and treatment effects after renal *** data of a Whipple’s disease patient treated in the affiliated hospital of Guizhou Medical University were collected and assessed *** treatment outcomes and clinical experience were then summarized via literature *** patient was admitted to the hospital due to recurrent diarrhea for 1 mo,shortness of breath,and 1 wk of fever,after 3 years of renal *** symptoms of the digestive and respiratory systems were not significantly improved after adjusting immunosuppressive regimen and anti-diarrheal,empirical antibiotic *** alveolar fluid was collected for meta-genomic next-generation sequencing(mNGS).The deoxyribonucleic acid sequence of Tropheryma whipplei was detected,and Whipple’s disease was ***,ceftriaxone,and other symptomatic treatments were given,and water-electrolyte balance was *** resolved quickly,and the patient was discharged after 20 d of *** compound sulfamethoxazole tablet was continued for 3 mo after *** diarrhea,fever,and other symp

关键词： Kidney transplantation Immunosuppression Whipple disease Whipple’s nutrient barrier Macrogenomics secondgeneration sequencing technology Case report

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