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| 1 | Dynamic deformation behavior of a face-centered cubic FeCoNiCrMn high-entropy alloy显示文摘In this study, mechanical tests were conducted on a face-centered cubic Fe Co Ni Cr Mn high-entropy alloy,both in tension and compression, in a wide range of strain rates(10^(-4)–10~4 s^(-1)) to systematically investigate its dynamic response and underlying deformation mechanism. Materials with different grain sizes were tested to understand the effect of grain size, thus grain boundary volume, on the mechanical properties. Microstructures of various samples both before and after deformation were examined using electron backscatter diffraction and transmission electron microscopy. The dislocation structure as well as deformation-induced twins were analyzed and correlated with the measured mechanical properties.Plastic stability during tension of the current high-entropy alloy(HEA), in particular, at dynamic strain rates, was discussed in lights of strain-rate sensitivity and work hardening rate. It was found that, under dynamic conditions, the strength and uniform ductility increased simultaneously as a result of the massive formation of deformation twins. Specifically, an ultimate tensile strength of 734 MPa and uniform elongation of $63% are obtained at 2.3 × 10~3 s^(-1), indicating that the alloy has great potential for energy absorption upon impact loading. | Junyang He Qi wang Husheng Zhang Lanhong Dai Toshiji Mukai Yuan Wu Xiongjun Liu Hui Wang Tai-Gang Nieh Zhaoping Lu | 2018 | Science Bulletin2018，63，6： | 9 |
| 2 | Optimizing Building Envelope Dimensions for Passive Solar Houses in the Qinghai-Tibetan Region: Window to Wall Ratio and Depth of Sunspace显示文摘It has been a focus to reduce the energy consumption and improve the space heating performance of high-altitude buildings in winter seasons. In view of the abundant solar energy resources of the high-altitude region, the establishment of passive solar houses should be an effective strategy to deal with the problem of thermal comfort. Both window to wall ratio(WWR) and sunspace depth are of vital importance to determine the thermal comfort level of passive solar houses, while there are limited studies on analyzing their impacts on passive solar houses in high-altitude regions. Therefore, this study is designed to examine how WWR and sunspace depth affect space heating of passive solar houses in the Qinghai-Tibetan region. To be specific, the hourly radiation temperature variations and percentages of dissatisfaction of the residential building with different sunspace depth/WWR(including 0.9 m/33%, 0.9 m/45%, 0.9 m/60%, 1.2 m/33% and 1.5 m/33%) were quantitatively examined. Results indicated that under the condition of 0.9 m/45%, the overall average radiation temperature of the building was approximately 16°C during the entire heating season, which could better satisfy the heating requirements. Meanwhile, the average temperature was higher, and the thermal comfort level was better under the ratio of 45% or the depth of 1.5 m, when only an individual factor in either ratio or depth was considered. These findings can provide references for the determination of dimensions of passive solar houses in high-altitude regions. | LIU Zhijian WU Di LI Junyang YU Hancheng HE Baojie | 2019 | Journal of Thermal Science2019，28，6： | 4 |
| 3 | Telomere-to-telomere and gap-free reference genome assembly of the kiwifruit Actinidia chinensis显示文摘Kiwifruit is an economically and nutritionally important fruit crop with extremely high contents of vitamin C.However,the previously released versions of kiwifruit genomes all have a mass of unanchored or missing regions.Here,we report a highly continuous and completely gap-free reference genome of Actinidia chinensis cv.‘Hongyang’,named Hongyang v4.0,which is the first to achieve two de novo haploid-resolved haplotypes,HY4P and HY4A.HY4P and HY4A have a total length of 606.1 and 599.6 Mb,respectively,with almost the entire telomeres and centromeres assembled in each haplotype.In comparison with Hongyang v3.0,the integrity and contiguity of Hongyang v4.0 is markedly improved by filling all unclosed gaps and correcting some misoriented regions,resulting in∼38.6–39.5 Mb extra sequences,which might affect 4263 and 4244 protein-coding genes in HY4P and HY4A,respectively.Furthermore,our gap-free genome assembly provides the first clue for inspecting the structure and function of centromeres.Globally,centromeric regions are characterized by higher-order repeats that mainly consist of a 153-bp conserved centromere-specific monomer(Ach-CEN153)with different copy numbers among chromosomes.Functional enrichment analysis of the genes located within centromeric regions demonstrates that chromosome centromeres may not only play physical roles for linking a pair of sister chromatids,but also have genetic features for participation in the regulation of cell division.The availability of the telomere-to-telomere and gap-free Hongyang v4.0 reference genome lays a solid foundation not only for illustrating genome structure and functional genomics studies but also for facilitating kiwifruit breeding and improvement. | Junyang Yue Qinyao Chen Yingzhen Wang Lei Zhang Chen Ye Xu Wang Shuo Cao Yunzhi Lin Wei Huang He Xian Hongyan Qin Yanli Wang Sijia Zhang Ying Wu Songhu Wang Yi Yue Yongsheng Liu | 2023 | Horticulture Research2023，10，2： | 4 |
| 4 | Liq-uid-phase oxidation of cyclohexane to cyclohexanoneover cobalt-doped SBA-3显示文摘 | Liu Xiaochen He Jiao Li Junyang | 2010 | Catalysis Communications2010，11，： | 1 |
| 5 | On the reversibility of the α_(2)/ω_(o) phase transformation in a high Nb containing TiAl alloy during high temperature deformation显示文摘The transformations between the phasesα_(2)(Ti_(3)Al)andω_(o)were investigated in a lamellar multiphase titanium aluminide alloy based onγ(TiAl).The paper complements an earlier investigation performed on the same material in which the importance of deformation-induced twin structures for theα_(2)→ω_(o) transformation was demonstrated.The present study shows that the reverse transformationω_(o)→α_(2) can also occur during high-temperature deformation.The transformation is probably triggered by constraint stresses,which exist between the different constituents due to the crystalline mismatch.The combined operation of mechanical twinning of theα_(2) phase and the reversible transformation fully converts theα_(2) lamellae into a mixture ofα_(2) andω_(o).This conversion greatly reduces the mechanical anisotropy existing in formerα_(2) lamellae.Regarding the technical use of the alloy,the stability of the converted structure with respect to further annealing was also examined.The reported processes occur at the nano-meter and sub nano-meter scale,thus,advanced characterization techniques were applied,such as high-resolution transmission electron microscopy(HRTEM)and atom probe tomography(APT). | Lin Song Fritz Appel Andreas Stark Uwe Lorenz Junyang He Zhanbing He Junpin Lin Tiebang Zhang Florian Pyczak | 2021 | Journal of Materials Science & Technology2021，，34： | 1 |
| 6 | Data-Driven Discovery of Stochastic Differential Equations显示文摘Stochastic differential equations(SDEs)are mathematical models that are widely used to describe complex processes or phenomena perturbed by random noise from different sources.The identification of SDEs governing a system is often a challenge because of the inherent strong stochasticity of data and the complexity of the system’s dynamics.The practical utility of existing parametric approaches for identifying SDEs is usually limited by insufficient data resources.This study presents a novel framework for identifying SDEs by leveraging the sparse Bayesian learning(SBL)technique to search for a parsimonious,yet physically necessary representation from the space of candidate basis functions.More importantly,we use the analytical tractability of SBL to develop an efficient way to formulate the linear regression problem for the discovery of SDEs that requires considerably less time-series data.The effectiveness of the proposed framework is demonstrated using real data on stock and oil prices,bearing variation,and wind speed,as well as simulated data on well-known stochastic dynamical systems,including the generalized Wiener process and Langevin equation.This framework aims to assist specialists in extracting stochastic mathematical models from random phenomena in the natural sciences,economics,and engineering fields for analysis,prediction,and decision making. | Yasen Wang Huazhen Fang Junyang Jin Guijun Ma Xin He Xing Dai Zuogong Yue Cheng Cheng Hai-Tao Zhang Donglin Pu Dongrui Wu Ye Yuan Jorge Gonçalves Jürgen Kurths Han Ding | 2022 | Engineering2022，，10： | 1 |
| 7 | Systematic study on size and temporal dependence of micro-LED arrays for display applications显示文摘Micro-LEDs are one of the most promising candidates for next-generation displays,yet they are inconvenienced by the efficiency reduction induced by the sidewall defects when pursuing further scaled-down device dimensions.We have systematically investigated both the size and temporal dependence of micro-LEDs.Micro-LED arrays with a mesa size ranging from 7 to 100μm were prepared for display purposes.The luminance and external quantum efficiency(EQE)were measured and discussed.Surprisingly,micro-LED arrays with a smaller mesa size exhibit a higher EQE under 100 ns pulse duration operation when compared with longer pulse duration operations.Under certain short-pulsed excitation,a 7×7μm^(2)micro-LED array even exhibits a>20%higher EQE as compared to the direct current(DC)or the long duration pulse operation condition.We thus concluded that the notorious efficiency reduction induced by sidewall defects in small-sized micro-LED arrays could be significantly reduced by applying short-pulse voltages. | JUNYANG NIE ZHI ZHANG KONGJIE CHEN YIFENG LIU SHUANG HE ZHONGHANG HUANG XIAONING ZHANG JIE SUN FAN ZHANG YONGSHENG WU QUN YAN | 2023 | Photonics Research2023，11，4： | 0 |
| 8 | 针对共模雷电冲击试验的开关电源设计显示文摘雷电冲击是造成过应力最普遍的原因。一些消费电子设备,例如机顶盒和DVD播放器,通常都会含有调谐接收器。当交流电源线或者天线受到雷击时,雷电冲击就会通过这些通路在设备内部产生过电压或者过电流现象。本文向开关电源(SMPS)电路的设计者提供一些建议,指导如何恰当地设计SMPS以避免由雷击造成的故障或者破坏。 | Luo Junyang Kok Siu Kam He Yi Jeoh Meng Kiat | 2006 | 电子产品世界2006，，12S： | 0 |
| 9 | Formation process and mechanical properties in selective laser melted multi-principal-element alloys显示文摘Additive manufacturing is believed to open up a new era in precise microfabrication,and the dynamic microstructure evolution during the process as well as the experiment-simulation correlated study is conducted on a prototype multi-principal-element alloys FeCrNi fabricated using selective laser melting(SLM).Experimental results reveal that columnar crystals grow across the cladding layers and the dense cellular structures develop in the filled crystal.At the micron scale,all constituent elements are evenly distributed,while at the near-atomic scale,Cr element is obviously segregated.Simulation results at the atomic scale illustrate that i)the solid-liquid interface during the grain growth changes from horizontal to arc due to the radial temperature gradient;ii)the precipitates,microscale voids,and stacking faults also form dynamically as a result of the thermal gradient,leading to the residual stress in the SLMed structure.In addition,we established a microstructure-based physical model based on atomic simulation,which indicates that strong interface strengthening exists in the tensile deformation.The present work provides an atomic-scale understanding of the microstructural evolution in the SLM process through the combination of experiment and simulation. | Jing Peng Jia Li Bin Liu Jian Wang Haotian Chen Hui Feng Xin Zeng Heng Duan Yuankui Cao Junyang He Peter K.Liaw Qihong Fang | 2023 | Journal of Materials Science & Technology2023，，2： | 0 |
| 10 | Iodine-assisted ultrafast growth of high-quality monolayer MoS_(2) with sulfur-terminated edges显示文摘Two-dimensional(2D)semiconductors have attracted great attention to extend Moore’s law,which motivates the quest for fast growth of high-quality materials.However,taking MoS_(2) as an example,current methods yield 2D MoS_(2) with a low growth rate and poor quality with vacancy concentrations three to five orders of magnitude higher than silicon and other commercial semiconductors.Here,we develop a strategy of using an intermediate product of iodine as a transport agent to carry metal precursors efficiently for ultrafast growth of high-quality MoS_(2).The grown MoS_(2) has the lowest density of sulfur vacancies(~1.41×10^(12) cm^(−2))reported so far and excellent electrical properties with high on/off current ratios of 108 and carrier mobility of 175 cm^(2) V^(−1) s^(−1).Theoretical calculations show that by incorporating iodine,the nucleation barrier of MoS_(2) growth with sulfur-terminated edges reduces dramatically.The sufficient supply of precursor and low nucleation energy together boost the ultrafast growth of sub-millimeter MoS_(2) domains within seconds.This work provides an effective method for the ultrafast growth of 2D semiconductors with high quality,which will promote their applications. | Qinke Wu Jialiang Zhang Lei Tang Usman Khan Huiyu Nong Shilong Zhao Yujie Sun Rongxu Zheng Rongjie Zhang Jingwei Wang Junyang Tan Qiangmin Yu Liqiong He Shisheng Li Xiaolong Zou Hui-Ming Cheng Bilu Liu | 2023 | National Science Open2023，2，4： | 0 |
| 11 | Enzyme@bismuth-ellagic acid:a versatile platform for enzyme immobilization with enhanced acid-base stability显示文摘In situ encapsulation is an effective way to synthesize enzyme@metal–organic framework biocatalysts;however,it is limited by the conditions of metal–organic framework synthesis and its acid-base stability.Herein,a biocatalytic platform with improved acid-base stability was constructed via a one-pot method using bismuth-ellagic acid as the carrier.Bismuth-ellagic acid is a green phenol-based metal–organic framework whose organic precursor is extracted from natural plants.After encapsulation,the stability,especially the acid-base stability,of amyloglucosidases@bismuth-ellagic acid was enhanced,which remained stable over a wide pH range(2–12)and achieved multiple recycling.By selecting a suitable buffer,bismuth-ellagic acid can encapsulate different types of enzymes and enable interactions between the encapsulated enzymes and cofactors,as well as between multiple enzymes.The green precursor,simple and convenient preparation process provided a versatile strategy for enzymes encapsulation. | Junyang Xu Guanhua Liu Ying He Liya Zhou Li Ma Yunting Liu Xiaobing Zheng Jing Gao Yanjun Jiang | 2023 | Frontiers of Chemical Science and Engineering2023，17，6： | 0 |
| 12 | Nickel-Carnosine complex:A new carrier for enzymes immobilization by affinity adsorption显示文摘Immobilization is an effective method to promote the application of enzyme industry for improving the stability and realizing recovery of enzyme.To some extent,the performance of immobilized enzyme depends on the choice of carrier material.Therefore,the development of new carrier materials has been one of the key issues concerned by enzyme immobilization researchers.In this work,a novel organic–inorganic hybrid material,nickel-carnosine complex(NiCar),was synthesized for the first time by solvothermal method.The obtained NiCar exhibits spherical morphology,hierarchical porosity and abundant unsaturated coordination nickel ions,which provide excellent anchoring sites for the immobilization of proteins.His-tagged organophosphate-degrading enzyme(Opd A)and x-transaminase(ω-TA)were used as model enzymes to evaluate the performance of NiCar as a carrier.By a simple adsorption process,the enzyme molecules can be fixed on the particles of NiCar,and the stability and reusability are significantly improved.The analysis of protein adsorption on NiCar verified that the affinity adsorption between the imidazole functional group on the protein and the unsaturated coordination nickel ions on NiCar was the main force in the immobilization process,which provided an idea way for the development of new enzyme immobilization carriers. | Junyang Xu Yanjun Jiang Liya Zhou Li Ma Zhihong Huang Jiafu Shi Jing Gao Ying He | 2021 | Chinese Journal of Chemical Engineering2021，34，10： | 0 |
| 13 | Heterobifunctional PEG-grafted black phosphorus quantum dots: “Three-in-One”nano-platforms for mitochondria-targeted photothermal cancer therapy显示文摘Black phosphorus(BP)nano-materials,especially BP quantum dots(BPQDs),performs outstanding photothermal antitumor effects,excellent biocompatibility and biodegradability.However,there are several challenges to overcome before offering real benefits,such as poor stability,poor dispersibility as well as difficulty in tailoring other functions.Here,a“three-in-one”mitochondria-targeted BP nano-platform,called as BPQD-PEG-TPP,was designed.In this nano-platform,BPQDs were covalently grafted with a heterobifunctional PEG,in which one end was an aryl diazo group capable of reacting with BPQDs to form a covalent bond and the other end was a mitochondria-targeted triphenylphosphine(TPP)group.In addition to its excellent near-infrared photothermal properties,BPQD-PEG-TPP had much enhanced stability and dispersibility under physiological conditions,efficient mitochondria targeting and promoted ROS production through a photothermal effect.Both in vitro and in vivo experiments demonstrated that BPQD-PEG-TPP performed much superior photothermal cytotoxicity than BPQDs and BPQD-PEG as the mitochondria targeted PTT.Thus this“three-in-one”nanoplatform fabricated through polymer grafting,with excellent stability,dispersibility and negligible side effects,might be a promising strategy for mitochondria-targeted photothermal cancer therapy. | Junyang Qi Yue Xiong Ke Cheng Qi Huang Jingxiu Cao Fumei He Lin Mei Gan Liu Wenbin Deng | 2021 | Asian Journal of Pharmaceutical Sciences2021，16，2： | 0 |
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