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Flexibility potential of Cs_(2)BX_(6)(B=Hf,Sn,Pt,Zr,Ti;X=I,Br,Cl)with application in photovoltaic devices and radiation detectors

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Journal of Energy Chemistry 2024年第8期95卷 271-287,I0006页

作者： Songya wang Changcheng Chen Shaohang Shi Ziyi Zhang Yan Cai Shuli Gao Wen Chen Shuangna Guo Elyas Abduryim Chao Dong Xiaoning guan Ying Liu gang Liu Pengfei Lu School of Science Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina Key Laboratory of Eco Planning&Green Building Ministry of EducationTsinghua UniversityBeijing 100080China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China School of Physics and Optoelectronic Engineering Ludong UniversityYantai 264025ShandongChina

As interest in double perovskites is growing,especially in applications like photovoltaic devices,understanding their mechanical properties is vital for device *** extensive exploration of structure and optical properties,research on mechanical aspects is *** article builds a vacancyordered double perovskite model,employing first-principles calculations to analyze mechanical,bonding,electronic,and optical *** show Cs_(2)Hfl_(6),Cs_(2)SnBr_(6),Cs_(2)SnI_(6),and Cs_(2)PtBr_(6)have Young's moduli below 13 GPa,indicating *** parameters explain flexibility variations with the changes of B and X site *** characteristic exploration reveals the influence of B and X site electronegativity on mechanical ***_(2)SnBr_(6)and Cs_(2)PtBr_(6)are suitable for solar cells,while Cs_(2)HfI_(6)and Cs_(2)TiCl_(6)show potential for semi-transparent solar *** property calculations highlight the high light absorption coefficients of up to 3.5×10^(5) cm^(-1)for Cs_(2)HfI_(6)and Cs_(2)TiCl_(6).Solar cell simulation shows Cs_(2)PtBr_(6)achieves 22.4%of conversion ***_(2)ZrCl_(6)holds promise for ionizing radiation detection with its 3.68 eV bandgap and high absorption ***-ordered double perovskites offer superior flexibility,providing valuable insights for designing stable and flexible *** understanding enhances the development of functional devices based on these perovskites,especially for applications requiring high stability and flexibility.

关键词： Double perovskite Mechanical properties Flexible Photovoltaic Radiation detectors

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Modeling and Generating Realistic Background Traffic by Hybrid Approach

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China Communications 2015年第10期12卷 147-157页

作者： QIAN Yaguan guan Xiaohui JIANG Ming CEN gang School of Science Zhejiang University of Science and Technology Zhejiang University of Water Resources and Electric Power College of Computer Science Hang Zhou Dianzi University School of Information and Electronic Engineering Zhejiang University of Science and Technology

One of the key challenges in largescale network simulation is the huge computation demand in fine-grained traffic *** from using high-performance computing facilities and parallelism techniques,an alternative is to replace the background traffic by simplified abstract models such as fluid *** paper suggests a hybrid modeling approach for background traffic,which combines ON/OFF model with TCP *** ON/OFF model is to characterize the application activities,and the ordinary differential equations(ODEs) based on fluid flows is to describe the TCP congestion avoidance *** apparent merits of this approach are(1) to accurately capture the traffic self-similarity at source level,(2) properly reflect the network dynamics,and(3) efficiently decrease the computational *** experimental results show that the approach perfectly makes a proper trade-off between accuracy and complexity in background traffic simulation.

关键词： network simulation background traffic ON/OFF models fluid flows self-similarity

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Implantable nerve guidance conduits:Material combinations,multi-functional strategies and advanced engineering innovations

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Bioactive Materials 2022年第5期7卷 57-76页

作者： Yixin Yan Ruotong Yao Jingyuan Zhao Kaili Chen Lirong Duan Tian wang Shujun Zhang Jinping guan Zhaozhu Zheng Xiaoqin wang Zekun Liu Yi Li gang Li National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringSoochow UniversitySuzhou215123China Department of Materials University of ManchesterOxford RoadManchesterM139PLUK Department of Materials Imperial College LondonSW72AZUK Wilson College of Textiles North Carolina State UniversityRaleigh27695USA Research Centre of Printed Flexible Electronics School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen518055China

Nerve guidance conduits(NGCs)have attracted much attention due to their great necessity and applicability in clinical use for the peripheral nerve *** efforts in recent years have been devoted to the development of high-performance NGCs using various materials and *** present review provides a comprehensive overview of progress in the material innovation,structural design,advanced engineering technologies and multi functionalization of state-of-the-art nerve guidance conduits *** advanced engineering technologies including extrusion-based system,laser-based system,and novel textile forming techniques in terms of weaving,knitting,braiding,and electrospinning techniques were also analyzed in *** arising from this review indicate that the structural mimetic NGCs combined with natural and synthetic materials using advanced manufacturing technologies can make full use of their complementary advantages,acquiring better biomechanical properties,chemical stability and ***,the existing challenges and future opportunities of NGCs were put forward aiming for further research and applications of NGCs.

关键词： Nerve guidance conduits Micro-nanofibers Multi-functional Surface modification Microenvironment

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Phase formation and crystallization of LiMn_(x)Fe_(1-x)PO_(4)-C olivine material with different Mn^(2+)contents fabricated at lower calcination temperatures

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Rare Metals 2022年第9期41卷 3142-3149页

作者： guan-Wei Liu Xiang-Jun Zhang Song Gong Dan-Ping Jiang Bing-Xue Liu Rong Yang Shi-gang Lu R&D center for energy storage and vehicle batteries General Research Institute for Nonferrous MetalsBeijing100088China

LiMn_(x)Fe_(1-x)PO_(4)-C cathode materials for lithium ion batteries were synthesized via solid-state method using Li_(2)CO_(3),MnCO_(3),NH_(4)H_(2)PO_(4),FePO_(4) and sucrose as starting raw materials,followed by high-temperature reduction-annealing.A series of calcination experiments at different temperatures reveal that Mn^(2+)-containing materials exhibit a lower temperature for olivine phase formation,for example LiMn_(0.5)Fe_(0.5)PO_(4) olivine phase forms at 275℃,while manganese-free crystalline LiFePO_(4) generally forms at the required temperature of 350℃.Increasing Mn^(2+) content is found to enhance crystallization degree of LiMn_(x)Fe_(1-x)PO_(4) material prepared at lower calcination temperatures.X-ray photoelectron spectroscopy(XPS)results confirm that Mn valence state(+2)remains unchanged up to~250℃ when calcined in ambient *** above-mentioned beneficial effect of manganese on phase formation and crystallization of olivine can be well attributed to the stable nature of Mn^(2+)and its strong propensity to form olivine phases.

关键词： Energy storage materials Solid-state reactions Phase transitions

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Interplay between topology and localization on superconducting circuits

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Chinese Physics B 2024年第6期33卷 240-246页

作者：关欣霍炳燕陈刚 Department of Materials and Chemical Engineering Taiyuan UniversityTaiyuan 030032China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China School of Physics Zhengzhou UniversityZhengzhou 450001China

Topological insulators occupy a prominent position in the realm of condensed matter physics. Nevertheless, the presence of strong disorder has the potential to disrupt the integrity of topological states, leading to the localization of all *** study delves into the intricate interplay between topology and localization within the one-dimensional Su–Schrieffer–Heeger(SSH) model, which incorporates controllable off-diagonal quasi-periodic modulations on superconducting *** the application of external alternating current(ac) magnetic fluxes, each transmon undergoes controlled driving,enabling independent tuning of all coupling strengths. Within a framework of this model, we construct comprehensive phase diagrams delineating regions characterized by extended topologically nontrivial states, critical localization, and coexisting topological and critical localization phases. The paper also addresses the dynamics of qubit excitations, elucidating distinct quantum state transfers resulting from the intricate interplay between topology and localization. Additionally, we propose a method for detecting diverse quantum phases utilizing existing experimental setups.

关键词： topology localization superconducting circuits

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Characterizing large-scale weak interlayer shear zones using conditional random field theory

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第10期15卷 2611-2625页

作者： gang Han Chuanqing Zhang Hemant Kumar Singh Rongfei Liu guan Chen Shuling Huang Hui Zhou Yuting Zhang Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources Changjiang River Scientific Research InstituteWuhanChina State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhanChina University of Chinese Academy of Sciences BeijingChina Department of Petroleum Engineering and Geoengineering Rajiv Gandhi Institute of Petroleum TechnologyJaisAmethi229304India State Key Laboratory of Water Resources and Hydropower Engineering Science Institute of Engineering Risk and Disaster PreventionWuhan UniversityWuhan430072China Institute for Risk and Reliability Leibniz Universität HannoverHannover30167Germany

The shear behavior of large-scale weak intercalation shear zones(WISZs)often governs the stability of foundations,rock slopes,and underground ***,due to their wide distribution,undulating morphology,complex fabrics,and varying degrees of contact states,characterizing the shear behavior of natural and complex large-scale WISZs precisely is *** study proposes an analytical method to address this issue,based on geological fieldwork and relevant experimental *** analytical method utilizes the random field theory and Kriging interpolation technique to simplify the spatial uncertainties of the structural and fabric features for WISZs into the spatial correlation and variability of their mechanical *** Kriging conditional random field of the friction angle of WISZs is embedded in the discrete element software 3DEC,enabling activation analysis of WISZ C2 in the underground caverns of the Baihetan hydropower *** results indicate that the activation scope of WISZ C2 induced by the excavation of underground caverns is approximately 0.5e1 times the main powerhouse span,showing local ***,the overall safety factor of WISZ C2 follows a normal distribution with an average value of 3.697.

关键词： Interlayer shear weakness zone Baihetan hydropower station Conditional random field Kriging interpolation technique Activation analysis

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Proteomic analysis of differentially expressed proteins between Xiangyou 15 variety and the mutant M15

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Frontiers in Biology 2014年第3期9卷 234-243页

作者： Zhen-Qian ZHANG gang XIAO Rui-Yang LIU Tai-Long TAN Chun-Yun guan Guo-Huai wang She-Yuan CHEN Xian-Meng WU Mei guan Qin LI Hunan Branch of National Oilseed Crops Improvement Centre Hunan Agricultural University Changsha Hunan 41 O128 China Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization Changsha Hunan 410128 China

A high oleic acid rapeseed material MI5 （derived from Xiangyou 15 variety） has been received more attention for its significant effect for human health. And it has almost the same physiological characteristic with Xiangyou 15 variety. To find out the difference between high oleic acid rapeseed material and Xiangyou 15 seedling, a comparative proteomic approach based on 2-DE and mass spectrometry was adopted. A total of 277 protein spots showed a significant change in intensity by more than 2.0-fold from M15 compared with Xiangyou 15 variety. Among them, 48 spots that changed at least 3.0-fold were excised from gels and successfully identified by MALDI-TOF/TOF MS. The identified proteins involved in metabolism of carbohydrate and energy （75%）, stress and defense （8.3%）, photosynthesis （6.3%）, protein metabolism （2.1%） and other functions （8.3%）. Then real-time quantitative PCR （qPCR） analysis was used to verify the expression levels of differentially expressed proteins, but the results did well agree with the proteomic results. In this work, most of the proteins involved in metabolism of carbohydrate and energy have higher expression in M15, which may reveal M15 has higher metabolism ability. These results provided much information to understand the differences between high oleic acid rapeseed material and Xiangyou 15 variety, which will be useful to screen high oleic rapeseed materials in seedling period.

关键词： proteomic analysis high oleic acid 2-D electrophoresis real-time quantitative PCR

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20(S)-Protopanaxatriol promotes the binding of P53 and DNA to regulate the antitumor network via multiomic analysis

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Acta Pharmaceutica Sinica B 2020年第6期10卷 1020-1035页

作者： Zhihua wang Wenbo Wu Xiangchen guan Shuang Guo Chaowen Li Ruixue Niu Jie Gao Min Jiang Liping Bai Elaine Laihan Leung Yuanyuan Hou Zhihong Jiang gang Bai State Key Laboratory of Medicinal Chemical Biology College of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjin 300353China State Key Laboratory of Quality Research in Chinese Medicine Macao University of Science and TechnologyTaipaMacaoChina

Although the tumor suppressor P53 is known to regulate a broad network of signaling pathways,it is still unclear how certain drugs influence these P53 signaling netw ***,we used a comprehensive singlecell multiomics view of the effects of ginsenosides on cancer *** and proteome profiling revealed that the antitumor activity of ginsenosides is closely as sociated with P53 protein.A miRNA-proteome interaction network revealed that P53 controlled the transcription of at least 38 proteins,and proteomemetabolome profiling analysis revealed that P53 regulated proteins involved in nucleotide metabolism,amino acid metabolism and"Warburg effect".The results of integrative multiomics analysis revealed P53 protein as a potential key target that influences the anti-tumor activity of ***,by applying affinity mass spectrometry(MS)screening and surface plasmon resonance fragment library screening,we confirmed that 20(S)-protopanaxatriol directly targeted adj acent regions of the P53 DNA-binding pocket and promoted the stability of P53-DNA interactions,which further induced a series of omics changes.

关键词： Multiomics analysis P53 20(S)-Protopanaxatriol DNA binding Ginsenosides anti-tumor network

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Heat shock protein 70-2 and tumor necrosis factor-α gene polymorphisms in Chinese children with Henoch- Schönlein purpura

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World Journal of Pediatrics 2016年第1期12卷 49-54页

作者： Gui-Xia Ding Chen-Hu wang Ruo-Chen Che Wan-Zhen guan Yang-gang Yuan Min Su Ai-Hua Zhang Song-Ming Huang Department of Nephrology Nanjing Children's HospitalNanjing Medical UniversityNanjingChina Institute of Pediatrics Nanjing Medical UniversityNanjingChina

Background:Henoch-Schönlein purpura(HSP)or IgAassociated vasculitis is related to immune *** of the heat shock protein 70-2 gene(HSP70-2)and the tumor necrosis factor-αgene(TNF-α)are known to be associated with immune *** purpose of this study was to investigate the likely association of HSP70-2(+1267A/G)and TNF-α(+308A/G)gene polymorphisms with HSP in ***:The polymerase chain reaction restriction fragment length polymorphism method was used to detect the HSP70-2 and TNF-αpolymorphisms in 205 cases of children with HSP and 53 controls;and the association of these polymorphisms with HSP and HSP nephritis(HSPN)was ***:The G/G genotypic frequencies at the+1267A/G position of HSP70-2 in the HSP group(22.9%)were signifi cantly higher than those in the healthy control group(9.4%)(χ^(2)=4.764,P<0.05).The frequencies of the A/A,A/G and G/G genotypes of HSP70-2 in patients in the nephritis-free group and the HSPN group showed no statistically significant *** A/A genotype frequency at the+308G/A position of TNF-αin the HSP group was 8.3%,which was higher than that in the control group(χ^(2)=6.447,P<0.05).The A allele frequency of TNF-αin the HSP group was higher than that in the control group,with a statistically significant difference(χ^(2)=7.241,P<0.05).Conclusions:The HSP70-2(+1267A/G)and TNF-α(+308G/A)gene polymorphisms were associated with HSP in *** G/G homozygosity of HSP70-2 and the A/A homozygosity of TNF-αmay be genetic predisposing factors for HSP.

关键词： gene polymorphism heat shock protein 70-2 Henoch-Schönlein purpura Henoch-Schönlein purpura nephritis tumor necrosis factor-α

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Establishment of a simple assay in vitro for hepatitis C virus NS3 serine protease based on recombinant substrate and single-chain protease

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World Journal of Gastroenterology 2002年第6期8卷 1088-1093页

作者： Gui-Xin Du Li-Hua Hou Rong-Bin guan Yi-gang Tong Hai-Tao wang,Department of Applied Molecular Biology,Institute of Microbiology and Epidemiology,Fengtai,Beijing 100071,China Department of Applied Molecular Biology Institute of Microbiology and Epidemiology Fengtai Beijing 100071 China. dugx@***

AIM: To establish a simple and convenient assay in vitro for the Hepatitis C virus NS3 serine protease based on the recombinant protease and substrate, and to evaluate its feasibility in screening the enzyme inhibitors. METHODS: Based on the crystallographic structure of hepatitis C virus (HCV) serine protease, a novel single-chain serine protease was designed, in which the central sequence of cofactor NS4A was linked to the N-terminus of NS3 serine protease domain via a flexible linker GSGS. The fusion gene was obtained by two-step PCR that was carried out with three primers and then cloned into the prokaryotic expression vector pQE30, and the recombinant clone was verified by DNA sequencing. The single-chain recombinant protease was expressed when the *** induced with IPTG and the expression conditions were optimized to produce large amount of soluble protease. The recombinant substrate NS5ab that covers the cleavage point NS5A/B was also expressed in ***. Both of the protease and substrate were purified by using Ni-NTA agarose metal affinity resin, then they were mixed together in a specific buffer, and the mixture was analyzed by SDS-PAGE. The cleavage system was used to evaluate some compounds for their inhibitory activity on serine ***: The single-chain recombinant protease was overexpressed as soluble protein when the E. coliwas induced at a low dosage of IPTG (0.2 mM) and cultured at a low temperature (15℃). The protease was purified by using Ni-NTA agarose metal affinity resin (the purity is over 95 %).The recombinant substrate NS5ab was expressed in an insoluble form and could refold successfully after purification and dialysis. A simple and convenient assay in vitro was established, in which the purified single-chain serine protease could cleave the recombinant substrate NS5ab into two fragments that were visualized by SDS-PAGE. PMSF had an effect on inhibiting activity of serine protease, while EDTA had ***: A simple and

关键词： C肝病毒 NS3丝氨酸蛋白酶体外简易检验法重组基质单链蛋白酶

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