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| 1 | Wall-modeling for large-eddy simulation of flows around an axisymmetric body using the diffuse-interface immersed boundary method显示文摘A novel method is proposed to combine the wall-modeled large-eddy simulation(LES) with the diffuse-interface direct-forcing immersed boundary(IB) method.The new developments in this method include:(i) the momentum equation is integrated along the wall-normal direction to link the tangential component of the effective body force for the IB method to the wall shear stress predicted by the wall model;(ii) a set of Lagrangian points near the wall are introduced to compute the normal component of the effective body force for the IB method by reconstructing the normal component of the velocity. This novel method will be a classical direct-forcing IB method if the grid is fine enough to resolve the flow near the wall. The method is used to simulate the flows around the DARPA SUBOFF model. The results obtained are well comparable to the measured experimental data and wall-resolved LES results. | Beiji SHI Xiaolei YANG Guodong JIN Guowei HE Shizhao WANG | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，3： | 8 |
| 2 | Effect of in ovo folic acid injection on hepatic IGF2 expression and embryo growth of broilers显示文摘Background: Insulin-like factor 2(IGF2) plays an important role in embryonic growth process by modulating intermediary metabolism and cell proliferation. Folic acid is involved in one carbon metabolism and contributes to DNA methylation which is related to gene expression. The purpose of this study was to explore whether folic acid could regulate IGF2 expression via epigenetic mechanism and further promote embryonic growth of new-hatched broilers.Methods: In the present study, 360 fertile eggs were selected and randomly assigned to four treatments. On11 embryonic day of incubation(E11), 0, 50, 100 and 150 μg folic acid were injected into eggs respectively.After hatched, growth performance of broilers were calculated. Hepatic IGF2 expression, methylation level and chromatin structure of promoter region were analyzed.Results: Results have showed that IGF2 expression was up-regulated in 150 μg folic acid group(P < 0.05) and other two dose of folic acid did not affect gene expression(P > 0.05). Meanwhile, methylation level of IGF2 promoter were lower in 100 and 150 μg groups, which was consistent with lower expression of DNA methyltransferase1(DNMT1)(P < 0.05). What's more, chromatin looseness of IGF2 promoter was higher in 150 μg group than control group(P < 0.05). Further, birth weight(BW), liver and bursa index of new-hatched chickens in 150 μg folic acid group were higher than the other groups(P < 0.05). There were positive correlations between hepatic IGF2 expression and BW and organs index(P < 0.05).Conclusion: In conclusion, our data have demonstrated that 150 μg folic acid injection on E11 could up-regulate IGF2 expression by modulating DNA hypomethylation and improving chromatin accessibility in the gene promoter region,and ulteriorly facilitate embryonic growth and organ development of broilers. | Yanli Liu Lihui Zhi Jing Shen Shizhao Li Junhu Yao Xiaojun Yang | 2017 | Journal of Animal Science and Biotechnology2017，8，1： | 5 |
| 3 | Materials and structures for the electron transport layer of efficient and stable perovskite solar cells显示文摘The electron transport layer plays a vital function in extracting and transporting photogenerated electrons, modifying the interface, aligning the interfacial energy level and minimizing the charge recombination in perovskite solar cells. This review summarizes the recent research progress on electron transport materials of metal oxides, organic molecules and multilayers. The doped metal oxides as electron transport materials in regular perovskite solar cells show improved device performance relative to their non-doped counterpart due to enhanced electron mobility and energy level alignment. The non-fullerene organic electron transport materials with better electron mobility and tunable energy level alignment need to be further designed and developed despite their advantages of mechanical flexibility and wide range tunability. The multilayer electron transport materials are suggested to be an important direction of research for efficient and stable perovskite solar cells because of their favorable synergistic interaction. | Shizhao Zheng Gaopeng Wang Tongfa Liu Lingyun Lou Shuang Xiao Shihe Yang | 2019 | Science China Chemistry2019，62，7： | 3 |
| 4 | Wind-induced response analysis and wind-resistant design of hyperbolic paraboloid cable net structures 显示文摘 | Shizhao Shen Qingshan Yang | 1999 | International Journal of Space Structures1999，14，1： | 1 |
| 5 | Seismic Performance of Double-Layer Spherical Reticulated Shell with Replaceable Bar-Type Dampers显示文摘 | Yang Yang Bill F. Spencer Youming Li Shizhao Shen | 2011 | International Journal of Space Structures2011，，1： | 1 |
| 6 | Wind-induced responseanalysis and wind-resistant design of hyperbolicparaboloid cable net structures显示文摘 | Shen Shizhao Yang Qingshan | 1999 | InternationalJournal of Space Structures1999，14，1： | 1 |
| 7 | Antioxidative solution processing yields exceptional Sn(Ⅱ) stability for sub-1.4 eV bandgap inorganic perovskite solar cells显示文摘Owing to the combined features of sub-1.4 eV bandgap and all-inorganic composition,cesium tin–lead(Sn-Pb)triiodide perovskite is promising for approaching the Shockley-Queisser limit of solar cells while avoiding the use of volatile organic cations.But the low Sn(Ⅱ)stability in this perovskite remains a hurdle for delivering its theoretically attainable device performance.Herein we present a synthesis method of this perovskite based on an acetylhydrazine-incorporated antioxidative solution system.Mechanistic investigation shows that acetylhydrazine effectively reduces the oxidation of solution-phase Sn(Ⅱ)and meanwhile creates an electron-rich,protective nano-environment for solid-state Sn(Ⅱ)ions.These lead to high oxidation resistance of the final film as well as effective defect inhibition.The resultant solar cells demonstrate power conversion efficiencies up to 15.04%,the highest reported so far for inorganic perovskite devices with sub-1.4 eV bandgaps.Furthermore,the T_(90) lifetime of these devices can exceed 1000 hours upon light soaking in a nitrogen atmosphere,demonstrating the potential advantage when lower-bandgap perovskite solar cells go all-inorganic. | Mingyu Hu Gaopeng Wang Qinghong Zhang Jue Gong Zhou Xing Jinqiang Gao Jian Wang Peng Zeng Shizhao Zheng Mingzhen Liu Yuanyuan Zhou Shihe Yang | 2022 | Journal of Energy Chemistry2022，31，9： | 1 |
| 8 | Diagnostic value of genetic mutation analysis and mutation profiling of cell-free DNA in intraocular fluid for vitreoretinal lymphoma显示文摘Dear editor,Vitreoretinal lymphoma(VRL)is a rare intraocular malignant lymphoma affecting the vitreous and/or retina.Pathological diagnosis is challenging.Retinal biopsies have high risks of irreversible visual impairment(even blind-ness),which are not used in clinics for patients with residual visual function.The limited cellular yield from vit-reous biopsies and the cell lysis also contribute to the low detection rates of VRL using cytopathology[1]. | Xiaoqing Chen Yunwei Hu Wenru Su Shizhao Yang Xiaoxiao Wang Ping Zhang Xiaoyu Hong Chuqiao Liang Zhuyun Qian Ziqiang Li Yong Tao Huiqiang Huang Dan Liang | 2022 | Cancer Communications2022，42，11： | 1 |
| 9 | Wind-induced response analysis and wind-resistant design of Hyperbolic Paraboloid cable net structures显示文摘 | Shen Shizhao Yang Qingshan | 1999 | International Journal of Structures1999，14，1： | 1 |
| 10 | Nondestructive monitoring of annealing and chemical-mechanical planarization behavior using ellipsometry and deep learning显示文摘The Cu-flling process in through-silicon via(TSV-Cu)is a key technology for chip stacking and three-dimensional vertical packaging.During this process,defects resulting from chemical-mechanical planarization(CMP)and annealing severely affect the reliability of the chips.Traditional methods of defect characterization are destructive and cumbersome.In this study,a new defect inspection method was developed using Mueller matrix spectroscopic ellipsometry.TSV-Cu with a 3-μm-diameter and 8-μm-deep Cu filling showed three typical types of characteristics:overdishing(defect-OD),protrusion(defect-P),and defect-free.The process dimension for each defect was 13 nm.First,the three typical defects caused by CMP and annealing were investigated.With single-channel deep learning and a Mueller matrix element(MME),the TSV-Cu defect types could be distinguished with an accuracy rate of 99.94%.Next,seven effective MMEs were used as independent channels in the artificial neural network to quantify the height variation in the Cu flling in the z-direction.The accuracy rate was 98.92%after training,and the recognition accuracy reached 1 nm.The proposed approach rapidly and nondestructively evaluates the annealing bonding performance of CMP processes,which can improve the reliability of high-density integration. | Qimeng Sun Dekun Yang Tianjian Liu Jianhong Liu Shizhao Wang Sizhou Hu Sheng Liu Yi Song | 2023 | Microsystems & Nanoengineering2023，9，2： | 0 |
| 11 | Viability of all-solid-state lithium metal battery coupled with oxide solid-state electrolyte and high-capacity cathode显示文摘Owing to the utilization of lithium metal as anode with the ultrahigh theoretical capacity density of 3860 mA h g^(-1)and oxide-based ceramic solid-state electrolytes(SE),e.g.,garnet-type Li7La_(3)Zr_(2)O_(12)(LLZO),all-state-state lithium metal batteries(ASLMBs)have been widely accepted as the promising alternatives for providing the satisfactory energy density and safety.However,its applications are still challenged by plenty of technical and scientific issues.In this contribution,the co-sintering temperature at 500℃is proved as a compromise method to fabricate the composite cathode with structural integrity and declined capacity fading of LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM).On the other hand,it tends to form weaker grain boundary(GB)inside polycrystalline LLZO at inadequate sintering temperature for LLZO,which can induce the intergranular failure of SE during the growth of Li filament inside the unavoidable defect on the interface of SE.Therefore,increasing the strength of GB,refining the grain to 0.4μm,and precluding the interfacial defect are suggested to postpone the electro-chemo-mechanical failure of SE with weak GB.Moreover,the advanced sintering techniques to lower the co-sintering temperature for both NCM-LLZO composite cathode and LLZO SE can be posted out to realize the viability of state-of-the-art ASLMBs with higher energy density as well as the guaranteed safety. | Xingxing Jiao Xieyu Xu Yongjing Wang Xuyang Wang Yaqi Chen Shizhao Xiong Weiqing Yang Zhongxiao Song Yangyang Liu | 2024 | Journal of Energy Chemistry2024，91，4： | 0 |
| 12 | Study on synergistic leaching of potassium and phosphorus from potassium feldspar and solid waste phosphogypsum via coupling reactions显示文摘To achieve the resource utilization of solid waste phosphogypsum(PG)and tackle the problem of utilizing potassium feldspar(PF),a coupled synergistic process between PG and PF is proposed in this paper.The study investigates the features of P and F in PG,and explores the decomposition of PF using hydrofluoric acid(HF)in the sulfuric acid system for K leaching and leaching of P and F in PG.The impact factors such as sulfuric acid concentration,reaction temperature,reaction time,material ratio(PG/PF),liquid–solid ratio,PF particle size,and PF calcination temperature on the leaching of P and K is systematically investigated in this paper.The results show that under optimal conditions,the leaching rate of K and P reach more than 93%and 96%,respectively.Kinetics study using shrinking core model(SCM)indicates two significant stages with internal diffusion predominantly controlling the leaching of K.The apparent activation energies of these two stages are 11.92 kJ·mol^(-1)and 11.55 kJ·mol^(-1),respectively. | Chao Li Shizhao Wang Yunshan Wang Xuebin An Gang Yang Yong Sun | 2024 | Chinese Journal of Chemical Engineering2024，65，1： | 0 |
| 13 | A new numerical framework for large-eddy simulation of waves generated by objects piercing water surface显示文摘A novel numerical framework is developed for large-eddy simulation(LES) of interactions among air, water, and solid bodies. The motions of air and water are solved on a fixed block-structured mesh, with the air–water interface captured using the volume-of-fluid method. A new sub-grid scale stress model based on the vortex identifier is used to improve the robustness and efficiency of the simulation flows with air–water interface. The new framework is tested in the context of bow waves and Kelvin waves generated by a water-surface vehicle. Wave breaking at the bow of the vehicle is captured in LES. The LES results of wave geometry approaches the measurements progressively as the grid resolution is refined. The simulation results indicate that LES is a useful tool for studying wave dynamics of water-surface vehicles. | Zixuan Yang Zuo Cui Shizhao Wang | 2019 | Theoretical & Applied Mechanics Letters2019，9，2： | 0 |
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