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| 1 | Reduced turnover rate of topsoil organic carbon in old-growth forests:a case study in subtropical China显示文摘Background:Old-growth forests are irreplaceable with respect to climate change mitigation and have considerable carbon(C)sink potential in soils.However,the relationship between the soil organic carbon(SOC)turnover rate and forest development is poorly understood,which hinders our ability to assess the C sequestration capacity of soil in old-growth forests.Methods:In this study,we evaluated the SOC turnover rate by calculating the isotopic enrichment factor β(defined as the slope of the regression between ^(13)C natural abundance and log-transformed C concentrations)along 0-30 cm soil profiles in three successional forests in subtropical China.A lower β(steeper slope)is associated with a higher turnover rate.The three forests were a 60-year-old P.massoniana forest(PF),a 100-year-old coniferous and broadleaved mixed forest(MF),and a 400-year-old monsoon evergreen broadleaved forest(BF).We also analyzed the soil physicochemical properties in these forests to examine the dynamics of SOC turnover during forest succession and the main regulators.Results:The β value for the upper 30-cm soils in the BF was significantly(p<0.05)higher than that in the PF,in addition to the SOC stock,although there were nonsignificant differences between the BF and MF.The β value was significantly(p<0.05)positively correlated with the soil recalcitrance index,total nitrogen,and available nitrogen contents but was significantly(p<0.01)negatively correlated with soil pH.Conclusions:Our results demonstrate that SOC has lower turnover rates in old-growth forests,accompanied by higher soil chemical recalcitrance,nitrogen status,and lower soil pH.This finding helps to elucidate the mechanism underlying C sequestration in old-growth forest soils,and emphasizes the important value of old-growth forests among global C sinks. | Xin Xiong Juxiu Liu Guoyi Zhou Qi Deng Huiling Zhang Guowei Chu Ze Meng Deqiang Zhang | 2021 | Forest Ecosystems2021，8，4： | 4 |
| 2 | Effects of Chemical Composition and Microstructure on Exudation of Fused Cast AZS Refractory Materials显示文摘The fused cast alumina-zirconia-silica(AZS)refractory is an indispensable material of the glass melting furnace,because of its outstanding corrosion resistance and low pollution to glass production.The exudation is one important index to evaluate the performance of fused cast AZS refractory products.In order to study the effects of chemical composition and microstructure on the exudation of fused cast AZS refractory materials,three types of fused-cast AZS refractory bricks(AZS33#,AZS36#and AZS41#)were selected from several companies as the research object,and their composition,bulk density,apparent porosity,the value of exudation,static corrosion rate and microstructure were discussed.The results show that the chemical composition,especially the content of SiO2 and Na2O,and the distribution of zirconia would greatly affect the content and viscosity of glass phase,thus affecting the glass exudation.This work will provide technical reference for the development of low exudation AZS refractories. | YI Shuai DENG Lina ZENG Luju XUE Fei PAN Chuancai LIN Guowei LIU Yueqiang ZHANG Hang XIE Jinli | 2019 | China's Refractories2019，28，2： | 1 |
| 3 | Hydrogen-bonded network: An effective approach to improve the thermal stability of organic/polymer electro-optic materials显示文摘Preparation of PMMA-co-PHPMN-(4-hydroxyphenyl)maleimide was prepared according tothe literature [1]. The monomer mixtures, comprising of 0.6g N-(4-hydroxyphenyl)maleimide, 0.4 g MMA and 0.004 g , ′-azobisisobutyronitrile (AIBN) were dissolved in 2 mLDMF. Air above the monomers was swept out using thefreeze-pump-thaw procedure three times and filled | DENG GuoWei BO ShuHui ZHOU TingTing ZHANG Rong LIU JiaLei LIU XinHou ZHEN Zhen QIU Ling | 2013 | Science China Chemistry2013，56，2： | 1 |
| 4 | Simulation of shale-proppant interaction in hydraulic fracturing by the dis crete element method显示文摘 | Deng Shouehun Li Haibo Ma Guowei | 2014 | International Journal of Rock Me- chanics and Mining Sciences2014，70，： | 1 |
| 5 | Systematic study of the structure-property relationship of a series of near-infrared absorbing push-pull heptamethine chromophores for electro-optics显示文摘This study reports the facile synthesis,characterization and quantitative structure-property relationship analysis of molecular and material properties of tricyanofuran-based(TCF)dipolar heptamethines with different electron donors of indoline(F1),benzo[e]-indoline(F2),benz[cd]indoline(F3),and Michler’s base derivatives(Ml and M2).The linear and nonlinear optical(NLO)properties of these chromophores have been thoroughly investigated,and the relationship between molecular and bulk response has been analyzed and compared with dipolar tetraene AJLZ53 as one of the best chromophores for electro-optic(EO)devices.In particular,we provide responsible data collection and analysis of optical and EO properties for poled thin films using a widelyrecognized and accredited methodology of prism coupling system with the help of rigid oriented gas model.We found that these push-pull heptamethines with synthetic efficacy exhibit high near-infrared absorption,excellent chemical stability and large hyperpolarizabilities(β)varied from 1,023×10^-30 esu for F1,3,047×10^-30 esu for M1,and 3,547×10^-30 esu for F3 at 1,304 nm in poled films,respectively.Theβvalues of these molecules are among the highest ones for TCF-based dipolar chromophores,and also agree well with reported analytical results in the solutions.In poled polymers with a modest chromophoric loading density of1.3×10^20 cm^-3,Ml and M2 give a high poled-induced noncentrosymmetric order and relatively large r33 values around40 pm V^-1 at 1,304 nm,indicative of largeμβvalues and suitable structural modification for high poling efficiency.Furthermore,a binary EO polymer based on the co-loading of Ml and AJLZ53 achieve a large r33 value of 143.3 pm V^-1 at 1,304 nm.Our studies suggest that concise synthesis and molecular design of push-pull polymethines can be well guided by the tabulation of their linear and NLO properties in bulk materials,and streamline future development of high performance organic EO materials for photonic applications. | Di Zhang Jie Zou Wen Wang Qian Yu Guowei Deng Jieyun Wu Zhong-An Li Jingdong Luo | 2021 | Science China Chemistry2021，64，2： | 0 |
| 6 | Resource Scheduling Algorithm and Ecnomic Model in ForCES Networks显示文摘Resource scheduling algorithm for ForCES(Forwarding and Control Element Separation) networks need to meet the flexibility,programmability and scalability of node resources.DBC(Deadline Budget Constrain) algorithm relies on users select cost or time priority,then scheduling to meet the requirements of users.However,this priority strategy of users is relatively simple,and cannot adapt to dynamic change of resources,it is inevitable to reduce the QoS.In order to improve QoS,we refer to the economic model and resource scheduling model of cloud computing,use SAL(Service Level Agreement) as pricing strategy,on the basis of DBC algorithm,propose an DABP(Deadline And Budget Priority based on DBC) algorithm for ForCES networks,DABP combines both budget and time priority to scheduling.In simulation and test,we compare the task finish time and cost of DABP algorithm with DP(Deadline Priority) algorithm and BP(Budget Priority) algorithm,the analysis results show that DABP algorithm make the task complete with less cost within deadline,benifical to load balancing of ForCES networks. | ZHUGE Bin DENG Li DAI Guowei WAN Lei WANG Weiming LAN Julong | 2014 | China Communications2014，11，3： | 0 |
| 7 | Interfacial Characteristics and Formation Mechanisms of Copper–steel Multimaterial Structures Fabricated via Laser Powder Bed Fusion Using Different Building Strategies显示文摘Laser powder bed fusion(LPBF)is an innovative method for manufacturing multimaterial components with high geometrical resolution.The LPBF-printing sequences of materials may be diverse in the actual design and application of multimaterial components.In this study,multimaterial copper(CuSn10)–steel(316 L)structures are printed using different building strategies(printing 316 L on CuSn10 and printing CuSn10 on 316 L)via LPBF,and the characteristics of two interfaces(the 316 L/CuSn10 or“L/C”and CuSn10/316 L or“C/L”interfaces)are investigated.Subsequently,the interfacial melting mode and formation mechanisms are discussed.At the L/C interface,the keyhole melting mode induced by the high volumetric energy density(EL/C=319.4 J/mm3)results in a large penetration depth in the pre-solidified layer and enhances laser energy absorption,thus promoting the extensive migration of materials and intense intermixing of elements to form a wide diffusion zone(∼400μm).At the C/L interface,the conduction mode induced by the low volumetric energy density(EC/L=74.1 J/mm3)results in a narrow diffusion zone(∼160μm).The interfacial defects observed are primarily cracks and pores.More cracks appeared at the C/L interface,which is attributable to the weak bonding strength of the narrow diffusion zone.This study provides guidance and reference for the design and manufacturing of multimaterial components via LPBF using different building strategies. | Linqing Liu Di Wang Guowei Deng Yongqiang Yang Jie Chen Jinrong Tang Yonggang Wang Yang Liu Xusheng Yang Yicha Zhang | 2022 | Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers)2022，1，3： | 0 |
| 8 | Biomaterial-assisted photoimmunotherapy for synergistic suppression of cancer progression显示文摘Photoimmunotherapy is an emerging treatment modality that uses photothermal,photodynamic and photochemical processes to fight against cancer by eliciting a robust host immune response.Recently,various nanoformulations of biomaterials have been rationally designed as highly effective photosensitive agents,immunoadjuvants or carriers to enhance phototherapeutic efficacy,boost immune stimulation,amplify nano-permeability and monitor cancer progression in situ.Nevertheless,relying solely on a single-modality therapy may not completely ablate primary tumors,and the metastasis and recurrence of tumors remain a serious challenge.To solve this issue,the strategy of combining photoimmunotherapy with other immunotherapies,such as immune checkpoint blockade,chimeric antigen receptor-T cell or cytokine therapy,can greatly enhance the effectiveness of oncology treatment and reduce the traditional adverse effects.Thus,it is very valuable to summarize the research progress in biomaterial-assisted combination photoimmunotherapy for clinical translation.In this review,the recent advances in constructing multifunctional nano-biomaterials for combinatorial photoimmunotherapy of cancer are summarized.Furthermore,the opportunities,challenges,future trends and prospects in this field are also analyzed to pave the way for advancing the next generation of clinical cancer management strategies. | Yanan Li Jing Cui Chenlong Li Caiting Deng Guowei Deng Hui Zhang Feifei An | 2023 | Chinese Chemical Letters2023，34，9： | 0 |
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