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Modeling of elastic wave propagation on a curved free surface using an improved finite-difference algorithm

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Science China(Physics,Mechanics & Astronomy) 2004年第5期47卷 633-648页

作者： wang xiuming1,3 & ZHANG Hailan2 1. CSIRo Petroleum,{1., po.bo. 113., techno.o.y park, bentley, wa 6102, australia 2. Institute of Acoustics, Chinese Academy of Sciences, Beijing 1.0080, China 3. Present address: Institute of Acoustics, Chinese Academy of Sciences, Beijing 1.0080, China CSIRo Petroleum ARRC Bentley Australia Institute of Acoustics Chinese Academy of Sciences Beijing China

Based on existing direct and imaging methods of a staggered finite-difference scheme, an improved algorithm for staggered finite-difference is proposed to implement rugged topographic free boundary conditions. This method assumes that the free surface can be implemented with horizontal and vertical free surface segments and their corners; the free surface passes through the grid points of shear stress components, instead of the normal stress components. Imaging is carried out for stress components in both horizontal and vertical directions, thus increasing the accuracy. To update particle- velocities, imaging and updating are first performed in the horizontal direction, and then in the vertical direction. The numerical results for elastic flat horizontal free surface with the imaging method and those for flat free surfaces of various slope angles with the proposed method are compared, and are shown to be in good agreement. The advantage of the proposed method is that only the stresses are dealt with in implementing the free surface into the staggered algorithm, which improves computation efficiency.

关键词： elastic wave simulation, curved free surface, staggered finite-difference, algorithm stability.

Nonlocal symmetries,soliton-cnoidal wave solution and soliton molecules to a(2+1.-dimensional modified KdV system

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Communications in Theoretical Physics 2024年第4期76卷 14-21页

作者： Jianyong wang bo Ren Department of Mathematics and Physics Quzhou UniversityQuzhou 324000China Department of Mathematics Zhejiang University of TechnologyHangzhou 310014China

A(2+1.-dimensional modified KdV(2DmKdV)system is considered from several ***,residue symmetry,a type of nonlocal symmetry,and the Bäcklund transformation are obtained via the truncated Painlevéexpansion ***,the residue symmetry is localized to a Lie point symmetry of a prolonged system,from which the finite transformation group is ***,the integrability of the 2DmKdV system is examined under the sense of consistent tanh expansion ***,explicit soliton-cnoidal wave solutions are ***,abundant patterns of soliton molecules are presented by imposing the velocity resonance condition on the multiple-soliton solution.

关键词： soliton-cnoidal wave solution nonlocal symmetry soliton molecule (2+1.-dimensional modified KdV system

DLP printing of BT/HA nanocomposite ceramic scaffolds using low refractive index BT crystals

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Journal of Materiomics 2024年第5期10卷 1036-1048页

作者： Ruixuan Xue Peimei yuan bo Zhao Fei Jing Xuyuan Kou wangyang yue yan wang Dongmei wang Galhenage Asha Sewvandi Dengwei Hu Faculty of Chemistry and Chemical Engineering Baoji University of Arts and SciencesKey Laboratory of Functional Materials of Baoji Engineering Research Center for Titanium Based Functional Materials and DevicesUniversities of Shaanxi Province1 Hi-Tech AvenueBaoji721013ShaanxiChina Department of Materials Science and Engineering Faculty of EngineeringUniversity of MoratuwaKatubeddaSri Lanka

Biological piezoelectric materials have significant potential for bone repair and energy harvesting owing to their excellent biocompatibility and piezoelectric *** BaTio3/Ca1.(po4)6(oH)2(BT/HA)composite material is an outstanding representative of biological piezoelectric materials,which has not been individually designed using digital light processing(DLP)3D printing because of the large difference in the refractive index of its ***,in this work,double-sided-tooth plate-like BT crystals with high curvature were prepared via a hydrothermal process,and BT/HA ceramic slurries were grinded out using dispersed intermittent ball milling scheme,and BT/HA nanocomposite ceramic scaffolds were fabricated by DLP 3D printing *** nanostructure,dielectric properties,and piezoelectric energy harvesting performance of the BT/HA nanocomposite ceramic scaffolds were *** influences of different morphologies and contents for BT on the piezoelectric potential and stress distribution were analyzed based on a multi-physics coupling finite element *** cell proliferation and adhesion abilities were investigated *** BT/HA nanocomposite ceramic scaffolds present excellent dielectric properties,cell proliferation and adhesion abilities,and an open circuit voltage of 8 V during piezoelectric energy *** material properties and multi-physics coupling finite element analysis imply that the double-sided-tooth plate-like BT plays an important role for the fastness structure and electric field distribution in the BT/HA ***,this work provides a strategy for the application of the customized BT/HA nanocomposite ceramic scaffolds in new-generation orthopedic implants and biological energy harvesting.

关键词： 3D printing BT/HA nanocomposite ceramics Bio-piezoelectric scaffolds Energy harvesting

Establishment of a prognosis predictive model for liver cancer based on expression of genes involved in the ubiquitin-proteasome pathway

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World Journal of Clinical oncology 2024年第3期15卷 434-446页

作者： Hua Li yi-po Ma Hai-Long wang Cai-Juan Tian yi-Xian Guo Hong-bo Zhang Xiao-Min Liu Peng-Fei Liu Department of Endoscopy Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and Therapy of TianjinTianjin’s Clinical Research Center for CancerTianjin 300060China Department of Critical Care Medicine Dingzhou City People’s HospitalDingzhou 073000Hebei ProvinceChina Department of oncology Tianjin Academy of Traditional Chinese Medicine Affiliated HospitalTianjin 300120China Tianjin Marvel Medical Laboratory Tianjin Marvelbio Technology Co.LtdTianjin 300180China Department of Intelligent techno.o.y Tianjin Yunquan Intelligent Technology Co.LtdTianjin 300381China Department of oncology Tianjin Huanhu HospitalTianjin 300350China

BACKGRoUND The ubiquitin-proteasome pathway(UPP)has been proven to play important roles in *** To investigate the prognostic significance of genes involved in the UPP and develop a predictive model for liver cancer based on the expression of these *** In this study,UPP-related E1.E2,E3,deubiquitylating enzyme,and proteasome gene sets were obtained from the Kyoto Encyclopedia of Genes and Genomes(KEGG)database,aiming to screen the prognostic genes using univariate and multivariate regression analysis and develop a prognosis predictive model based RESULTS Five genes(including autophagy related 1.,proteasome 20S subunit alpha 8,proteasome 20S subunit beta 2,ubiquitin specific peptidase 1. like family member 2,and ubiquitin specific peptidase 8)were proven significantly correlated with prognosis and used to develop a prognosis predictive model for liver *** training,validation,and Gene Expression omnibus sets,the overall survival differed significantly between the high-risk and low-risk *** expression of the five genes was significantly associated with immunocyte infiltration,tumor stage,and postoperative recurrence.A total of 1.1.differentially expressed genes(DEGs)were identified between the high-risk and low-risk groups and they were enriched in 20 and 5 gene ontology and KEGG *** division cycle 20,Kelch repeat and BTB domain containing 1.,and DDB1.and CUL4 associated factor 4 like 2 were the DEGs in the E3 gene set that correlated with *** We have constructed a prognosis predictive model in patients with liver cancer,which contains five genes that associate with immunocyte infiltration,tumor stage,and postoperative recurrence.

关键词： Liver cancer Ubiquitin-proteasome pathway Prognosis prediction Gene expression Immune infiltration

The Nano Research young Innovators Awards in bio-inspired nanomaterials

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Nano Research 2024年第2期17卷 417-425页

作者： Jun Chen Shuotao wang Department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Nano Research young Innovators(NR45)Awards are designed to acknowledge and celebrate the achievements of young researchers under 45 years of *** individuals have made significant contributions to the field of nanoscience and *** the inaugural NR45 Awards in 201.,the journal's editorial board has recognized over a hundred innovators specializing in nanobiotechno.o.y,nano energy,two-dimensional materials,and *** focus of the 2023 NR45 Awards is on bioinspired nanomaterials,acknowledging thirty-three outstanding young innovators for their extraordinary contributions in developing these materials with applications spanning clean energy,human healthcare,monitoring,and disease treatments,as shown in *** extend our heartfelt congratulations to all the 33 NR45 Awardees in 2023!

关键词： journal materials contributions

Surface-derived phosphate layer on NiFe-layered double hydroxide realizes stable seawater oxidation at the current density of 1.A·cm^(−2)

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Nano Research 2024年第7期17卷 5786-5794页

作者： Chaoxin yang Zhengwei Cai Jie Liang Kai Dong Zixiao Li Hang Sun Shengjun Sun Dongdong Zheng Hui Zhang yongsong Luo yongchao yao yan wang yuchun Ren Qian Liu Luming Li Wei Chu Xuping Sun bo Tang College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Department of Science and Environmental Studies Faculty of Liberal Arts and Social Sciencethe Education University of Hong KongHong Kong 999077China Institute for Advanced Study Chengdu UniversityChengdu 610106China Laoshan Laboratory Qingdao 266237China

Seawater electrolysis,especially in coastlines,is widely considered as a sustainable way of making clean and high-purity H2 from renewable energy;however,the practical viability is challenged severely by the limited anode durability resulting from side reactions of chlorine ***,we report an effective Cl^(−) blocking barrier of NiFe-layer double hydroxide(NiFe-LDH)to harmful chlorine chemistry during alkaline seawater oxidation(ASo),a pre-formed surface-derived NiFe-phosphate(Pi)***,the po_(4)^(3−)-enriched outer-layer is capable of physically and electrostatically inhibiting Cl−adsorption,which protects active Ni^(3+)sites during *** NiFe-LDH with the NiFe-Pi outer-layer(NiFe-LDH@NiFe-Pi)exhibits higher current densities(j)and lower overpotentials to afford 1.A·cm^(−2)(η1.00 of 370 mV versusη1.00 of 420 mV)than the NiFe-LDH in 1.M KoH+***,the NiFe-LDH@NiFe-Pi also demonstrates longer-term electrochemical durability than NiFe-LDH,attaining 1.0-h duration at the j of 1.A·cm^(−2).Additionally,the importance of surface-derived po_(4)^(3−)-enriched outer-layer in protecting the active centers,γ-NiooH,is explained by ex situ characterizations and in situ electrochemical spectroscopic studies.

关键词： seawater oxidation phosphate outer-layer layered double hydroxide electrostatic repulsion in situ Raman

Non-flammable long chain phosphate ester based electrolyte via competitive solventized structures for high-performance lithium metal batteries

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Journal of Energy Chemistry 2024年第10期97卷 156-165,I0004页

作者： Li Liao Zhiqiang Han Xuanjie Feng Pan Luo Jialin Song yin Shen Xiaoshuang Luo Xinpeng Li Xuanzhong Wen bo yu Junchen Chen Bingshu Guo Mingshan wang yun Huang Hongmei Zhang Mengmeng yin Jiangtao Liu yuanhua Lin Xing Li School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500SichuanChina State Key Laboratory of Advanced Chemical power Sources Guizhou Meiling Power Sources Co.LtdZunyi 563003GuizhouChina Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green InnovationSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China

Safety remains a persistent challenge for high-energy-density lithium metal batteries(LMBs).The development of safe and non-flammable electrolytes is especially important in harsh conditions such as high ***,a flame-retardant,low-cost and thermally stable long chain phosphate ester based(tributyl phosphate,TBP)electrolyte is reported,which can effectively enhance the cycling stability of highly loaded high-nickel LMBs with high safety through co-solvation *** interfacial compatibility between TBP and electrode is effectively improved using a short-chain ether(glycol dimethyl ether,DME),and a specially competitive solvation structure is further constructed using lithium borate difluorooxalate(LiDFoB)to form the stable and inorganic-rich electrode *** from the presence of the cathode electrolyte interphase(CEI)and solid electrolyte interphase(SEI)enriched with LiF and Li_(x)po_(y)F_(z),the electrolyte demonstrates excellent cycling stability assembled using a 50μm lithium foil anode in combination with a high loading NMC81.(1..4 mg cm^(-2))cathode,with 88%capacity retention after 1.0 ***,the electrolyte exhibits excellent high-temperature characteristics when used in a 1.Ah pouch cell(N/P=0.26),and higher thermal runaway temperature(238℃)in the ARC(accelerating rate calorimeter)demonstrating high *** novel electrolyte adopts long-chain phosphate as the main solvent for the first time,and would provide a new idea for the development of extremely high safety and high-temperature electrolytes.

关键词： Non-flammable electrolyte Long chain phosphate ester Solvation structure Lithium metal batteries Battery safety

“离子交换法”测定硝酸盐氧同位素组成方法的改进

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陕西科技大学学报 2024年第1期42卷 88-94页

作者：王波刘彪王雪梅陕西科技大学化学与化工学院天然产物稳定同位素组学实验室陕西省轻化工助剂重点实验室陕西西安710021

硝酸盐氮、氧同位素组成(δ^(1.)N、δ^(1.)o)被广泛应用于识别水体中硝酸盐的来源及其生化转化过程.离子交换技术作为主要分析方法之一,被大量应用于测定硝酸盐的氮同位素组成,然而在测定氧同位素组成时,由于该方法的样品处理过程复杂... 详细信息

硝酸盐氮、氧同位素组成(δ^(1.)N、δ^(1.)o)被广泛应用于识别水体中硝酸盐的来源及其生化转化过程.离子交换技术作为主要分析方法之一,被大量应用于测定硝酸盐的氮同位素组成,然而在测定氧同位素组成时,由于该方法的样品处理过程复杂繁琐、耗时长(3~5天)等缺点限制了它的广泛应用.通过对原技术路线进行改进:将定量的BaCl_(2)直接加入到野外采集的水样中,消除含氧阴离子(So_(4)^(2-)和po_(4)^(3-))对测定No_(3)^(-)离子δ^(1.)o的干扰,然后再通过阴离子交换树脂吸附富集、HCl洗脱No_(3)^(-)、Ag_(2)o中和,得到用于测试δ^(1.)o的AgNo_(3)样品.与原路线相比,改进后方法的优势在于:(1.样品处理步骤由原来的5步缩短到了3步;(2)样品处理时长由3~5天缩短至1.2天;(3)减少了昂贵的化学试剂的用量;(4)减少了同位素的分馏.

关键词：氧同位素硝酸盐离子交换法

A regular MoG black hole's impact on shadows and gravitational weak lensing in the presence of a quintessence field

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Communications in Theoretical Physics 2024年第8期76卷 91-102页

作者： Ahmad Al-Badawi Sanjar Shaymatov Mirzabek Alloqulov Anzhong wang Department of Physics Al-Hussein Bin Talal UniversityPO Box:2071111Ma’anJordan Institute for Theoretical Physics and Cosmology Zhejiang University of TechnologyHangzhou 310023China Tashkent State Technical University Tashkent 100095Uzbekistan University of Tashkent for Applied Sciences Str.Gavhar 1Tashkent 100149Uzbekistan New Uzbekistan University Movarounnahr Street 1Tashkent 100000Uzbekistan Institute of Fundamental and Applied Research National Research University TIIAMEKori Niyoziy 39Tashkent 100000Uzbekistan GCAP-CASPER Physics DepartmentBaylor UniversityWacoTX 76798-7316United States of America

We investigate the impact of the modified gravity(MoG)field and the quintessence scalar field on horizon evolution,black hole(BH)shadow and the weak gravitational lensing around a static spherically symmetric *** first begin to write the BH metric associated with the MoG parameter and quintessence scalar *** then determine the BH shadow and obtain numerical solutions for the photon sphere and shadow *** show that the MoG(α)and the quintessence(c)parameters have a significant impact on the BH shadow and photon *** on the analysis,we further show that the combined effects of the MoG parameter and quintessence field can increase the values of BH shadow and photon sphere *** also obtain constraints on the BH parameters by applying the observational data of Sgr A^(★)and M87^(★).Finally,we consider the weak deflection angle of BH within the context of the Gauss-bonnet theorem(GBT)and show that the combined effects of the MoG and quintessence parameters do make the value of the deflection angle increase,and find this remarkable property is in good agreement with the physical meaning of both parameters that can maintain the strong gravitational field in the surrounding environment of a BH.

关键词： modified gravity shadows gravitational weak lensing quintessence field