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| 1 | Future biomass carbon sequestration capacity of Chinese forests显示文摘Chinese forests, characterized by relatively young stand age, represent a significant biomass carbon(C)sink over the past several decades. Nevertheless, it is unclear how forest biomass C sequestration capacity in China will evolve as forest age, climate and atmospheric CO_2 concentration change continuously. Here,we present a semi-empirical model that incorporates forest age and climatic factors for each forest type to estimate the effects of forest age and climate change on total forest biomass, under three different scenarios based on the fifth phase of the Coupled Model Intercomparison Project(CMIP5). We estimate that age-related forest biomass C sequestration to be 6.69 Pg C(~0.17 Pg C a^(-1)) from the 2000s to the 2040s.Climate change induces a rather weak increase in total forest biomass C sequestration(0.52–0.60 Pg C by the 2040s). We show that rising CO_2 concentrations could further increase the total forest biomass C sequestration by 1.68–3.12 Pg C in the 2040s across all three scenarios. Overall, the total forest biomass in China would increase by 8.89–10.37 Pg C by the end of 2040s. Our findings highlight the benefits of Chinese afforestation programs, continued climate change and increasing CO_2 concentration in sustaining the forest biomass C sink in the near future, and could therefore be useful for designing more realistic climate change mitigation policies such as continuous forestation programs and careful choice of tree species. | Yitong Yao Shilong Piao Tao Wang | 2018 | Science Bulletin2018，63，17： | 25 |
| 2 | Empirical estimates of regional carbon budgets imply reduced global soil heterotrophic respiration显示文摘Resolving regional carbon budgets is critical for informing land-based mitigation policy.For nine regions covering nearly the whole globe,we collected inventory estimates of carbon-stock changes complemented by satellite estimates of biomass changes where inventory data are missing.The net land–atmospheric carbon exchange(NEE)was calculated by taking the sum of the carbon-stock change and lateral carbon fluxes from crop and wood trade,and riverine-carbon export to the ocean.Summing up NEE from all regions,we obtained a global‘bottom-up'NEE for net land anthropogenic CO_(2)uptake of–2.2±0.6 Pg C yr^(-1)consistent with the independent top-down NEE from the global atmospheric carbon budget during 2000–2009.This estimate is so far the most comprehensive global bottom-up carbon budget accounting,which set up an important milestone for global carbon-cycle studies.By decomposing NEE into component fluxes,we found that global soil heterotrophic respiration amounts to a source of CO_(2)of 39 Pg C yr^(-1)with an interquartile of 33–46 Pg C yr^(-1)—a much smaller portion of net primary productivity than previously reported. | Philippe Ciais Yitong Yao Thomas Gasser Alessandro Baccini Yilong Wang Ronny Lauerwald Shushi Peng Ana Bastos Wei Li Peter A.Raymond Josep G.Canadell Glen P.Peters Rob J.Andres Jinfeng Chang Chao Yue A.Johannes Dolman Vanessa Haverd Jens Hartmann Goulven Laruelle Alexandra G.Konings Anthony W.King Yi Liu Sebastiaan Luyssaert Fabienne Maignan Prabir K.Patra Anna Peregon Pierre Regnier Julia Pongratz Benjamin Poulter Anatoly Shvidenko Riccardo Valentini Rong Wang Grégoire Broquet Yi Yin Jakob Zscheischler Bertrand Guenet Daniel SGoll Ashley-P.Ballantyne Hui Yang Chunjing Qiu Dan Zhu | 2021 | National Science Review2021，8，2： | 3 |
| 3 | Microstructure Study in Slow Neutron Irradiated Bi-2223显示文摘The effect of slow neutron irradiation at a low Auence of about 10^(8)n/cm^(2) on the microstructures of Bi-2223 polycrystalline samples was observed by transmission electron microscopy.By comparative study of the defect structures in a given area in one sample,we get evidence for the flux pinning enhancement by low Auence slow neutron irradiation. | SHEN Guangjun JI Helin JIN Jirong JIN Xin ZHANG Yitong XU Xiaonong YAO Xixian | 1993 | Chinese Physics Letters1993，10，1： | 0 |
| 4 | Flux Pinning in Y_(1-x)M_(x)Ba_(2)Cu_(3)O_(7-δ)(M=Gd,Eu and Sm)System显示文摘In this paper,the flux pinning effects in Y_(1-x)M_(x)Ba_(2)Cu_(3)O_(7-δ)(M=Gd,Eu and Sm)samples are reported.It is found that there is another pinning mechanism under higher magnetic fields in addition to that under lower fields.This pinning effect may stem from the lattice stress field resulting from the partial substitution of the rare earth elements with different atomic radii for Y. | LI Jonghen FANG Minghu HU Gangjin ZHANG Xiaojun JIAO Zhengkuan ZHANG Qirui ZHANG Yitong JIN Xin YAO Xixian | 1992 | Chinese Physics Letters1992，9，12： | 0 |
| 5 | A Method of Drawing Upseleciton Index for Improving Feed Efficiency显示文摘1IntroductionIthasbeenprovedboththeoreticalyandpracticalythatcomprehensiveselectionbasedontheselectionindexisthemosteficienta... | Yang Yunqing, Wang Yitong, Yao Xiaomin ( Northeast Agriculture University, Harbin 150030, P R C) | 1999 | Journal of Northeast Agricultural University(English Edition)1999，6，1： | 0 |
| 6 | The polycaprolactone/silk fibroin/carbonate hydroxyapatite electrospun scaffold promotes bone reconstruction by regulating the polarization of macrophages显示文摘Macrophages are known to modulate the osteogenic environment of bone regeneration elicited by biological bone grafts.Alteration in certain chemical components tends to affect macrophages polarization.Comparatively to hydroxyapatite(HAp),carbonate hydroxyapatite(CHA)consists of 7.4(wt%)carbonate ions and more closely resembles the mineral content of bone.It remains unknown whether CHA scaffolds or HA scaffolds have better osteogenic properties.In this study,we fabricated PCL/SF scaffold,PCL/SF/HAp scaffold and PCL/SF/CHA scaffold using the electrospinning technique.Despite comparable mechanical properties,the PCL/SF/CHA scaffold exhibited better osteogenic properties than the PCL/SF/HAp scaffold.Although no significant differences were observed between the two scaffolds for promoting osteoblast differentiation in vitro,the PCL/SF/CHA group appeared to be more effective at promoting bone regeneration in cranial defects in vivo.The PCL/SF/CHA scaffold was found to promote macrophage polarization toward M2 via activating the JAK/STAT5 pathway which caused a pro-osteogenic microenvironment to facilitate osteoblast differentiation.The results of this study indicated a higher potential of CHA to substitute HAp in the production of bone scaffolds for better bone regeneration. | Xiaoshi Jia Jing Zhou Jinqiu Ning Maoquan Li Yitong Yao Xiaodong Wang Yutao Jian Ke Zhao | 2022 | Regenerative Biomaterials2022，9，1： | 0 |
| 7 | Stacked arrangement of substrate integrated waveguide cavity-backed semicircle patches for wideband circular polarization with filtering effect显示文摘We present a novel broadband circularly polarized(CP)antenna with filtering effect for X-and Kuband satellite wireless communication.The structure comprises a driven layer(also a filtering layer)and a stacked layer(also a CP layer).The bandpass filtering response consists of two radiation nulls,which is the combined effect of a substrate integrated waveguide(SIW)cavity-backed aperture and embedded driven patch. | Yitong YAO Gang DONG Zhangming ZHU Yintang YANG | 2023 | Frontiers of Information Technology & Electronic Engineering2023，24，5： | 0 |
| 8 | Memory Effect in Ceramic Superconductors显示文摘We measured the time decay of the magnetic moment of high Tc supercon-ductors YBa_(2)Cu_(3)O_(7-δ);ceranic samples and found the memory effect which has hitherto been reported ouly in single crystals.The temperature and feld ranges,especialy the memory time are diferent from those of the latter.We believed that the memory phenomenon in ceramic samples at liquid nitrogen temperature can only be understood in a combined picture of both fux creep and glass behaviour. | JIN Xin ZHANG Yitong YAN Yong JI Helin LU Ruixi LU Mu YAO Xixian | 1991 | Chinese Physics Letters1991，8，11： | 0 |
| 9 | MXene Ti_(3)C_(2) decorated g-C_(3)N_(4)/ZnO photocatalysts with improved photocatalytic performance for CO_(2) reduction显示文摘Photocatalytic reduction of CO_(2) is considered as a kind of promising technologies for solving the greenhouse effect.Herein,a novel hybrid structure of g-C_(3)N_(4)/ZnO/Ti_(3)C_(2) photocatalysts was designed and fabricated to investigate their abilities for CO_(2) reduction.As demonstration,heterojunction of g-C_(3)N_(4)/ZnO can improve photogenerated carriers’separation,the addition of Ti_(3)C_(2) fragments can further facilitate the photocatalytic performance from CO_(2) to CO.Hence,g-C_(3)N_(4)/ZnO/Ti_(3)C_(2) has efficiently increased CO production by 8 and 12 times than pristine g-C_(3)N_(4) and ZnO,respectively.Which is ascribed to the photogenerated charge migration promoted by metallic Ti_(3)C_(2).This work provides a guideline for designing efficient hybrid catalysts on other applications in the renewable energy fields. | Jianxin Li Yuhua Wang Yitong Wang Yao Guo Shiding Zhang Haixiang Song Xianchang Li Qianqian Gao Wanyu Shang Shuaishuai Hu Huibin Zheng Xifei Li | 2023 | Nano Materials Science2023，5，2： | 0 |
| 10 | Numerical Investigation into the Air Flow Distributions of the Air Conditioning System in the Modular Data Center显示文摘Data center plays an increasingly important role in everyday life.As data center is becoming more and more powerful,energy consumption is also increasing dramatically.The air conditioning system occupies at least 50 percent of the total energy consumption.Therefore,delicate analysis on the air conditioning system could help to reduce energy consumption in data center.An advanced Finite Volume Method with RNG k-ε model and convective heat exchange model is used in this paper to study the airflow and the temperature distribution of modular data center under different arrangements.Specifically,the calculation formula of convective heat transfer coefficient for plate flow is adopted to simplify analysis;and fans on the back of racks are simplified to be walls with a certain pressure jump.Simulations reveal that,in the case where air conditioners are arranged face-to-face,the temperature distribution on the back of racks is not uniform,and local high temperature points emerge near the side wall of air conditioners.By analyzing the distribution of air flow and temperature,geometric model is optimized by using a diagonal rack arrangement and drilling holes on the side wall.In the same energy consumption situation,the overall maximum temperature of the optimized model is reduced by 2.3℃ compared with that of the original one,and the maximum temperature on the server surface is reduced by 1℃.Based on the optimized model,the effect of the hot aisle distance on the temperature distribution is studied.By simulating four different cases with various distances of hot aisle of 100cm,120cm,130cm and 150cm,it is found that the temperature is generally lower and distributed more evenly in the case with 120cm hot aisle distance.This demonstrates that the distance of hot aisle has an effect on temperature. | Hao Dong Ziqiang Qin Shicheng Liu Yao Li Yingying Shen Haibo Wang Yitong Zong XiaojunWu Haiqing Si | 2019 | Advances in Applied Mathematics and Mechanics2019，11，1： | 0 |
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