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| 1 | Recalescence Velocity and Microstructure Evolution of Deeplyundercooled Cu_(65)Ni_(35) Alloy显示文摘The Cu_(65)Ni_(35) alloy liquid was undercooled by the fluxing method,and the rapid solidification structure was obtained by natural cooling.The solidification interface migration information of Cu_(65)Ni_(35) alloy liquid in rapid solidification stage was photographed with the help of high-speed camera,and the recalescence velocity was calculated.The microstructure evolution of the alloy was systematically studied by observing the microstructure morphology and taking photos on the metallographic microscope.By analyzing the evolution of dendrite grain size and microstructure microhardness with undercoolingand relying on electron backscatter diffraction(EBSD)technology,the grain refinement mechanism of microstructure under high undercooling and low undercooling is finally confirmed. | 梁海龙 CHENG Tang 李瑞琴 WANG Hongfu YANG Jine XIE Jinpeng 赵宇宏 | 2022 | Journal of Wuhan University of Technology(Materials Science)2022，37，2： | 2 |
| 2 | Achieving a high energy storage density in Ag(Nb,Ta)O_(3) antiferroelectric films via nanograin engineering显示文摘Due to its lead-free composition and a unique double polarization hysteresis loop with a large maximum polarization(Pmax)and a small remnant polarization(Pr),AgNbO_(3)-based antiferroelectrics(AFEs)have attracted extensive research interest for electric energy storage applications.However,a low dielectric breakdown field(Eb)limits an energy density and its further development.In this work,a highly efficient method was proposed to fabricate high-energy-density Ag(Nb,Ta)O_(3) capacitor films on Si substrates,using a two-step process combining radio frequency(RF)-magnetron sputtering at 450℃and post-deposition rapid thermal annealing(RTA).The RTA process at 700℃led to sufficient crystallization of nanograins in the film,hindering their lateral growth by employing short annealing time of 5 min.The obtained Ag(Nb,Ta)O_(3) films showed an average grain size(D)of~14 nm(obtained by Debye-Scherrer formula)and a slender room temperature(RT)polarization-electric field(P-E)loop(Pr≈3.8 mC·cm^(−2) and P_(max)≈38 mC·cm^(−2) under an electric field of~3.3 MV·cm^(−1)),the P-E loop corresponding to a high recoverable energy density(W_(rec))of~46.4 J·cm^(−3) and an energy efficiency(η)of~80.3%.Additionally,by analyzing temperature-dependent dielectric property of the film,a significant downshift of the diffused phase transition temperature(T_(M2-M3))was revealed,which indicated the existence of a stable relaxor-like AFE phase near the RT.The downshift of the T_(M2-M3) could be attributed to a nanograin size and residual tensile strain of the film,and it led to excellent temperature stability(20-240℃)of the energy storage performance of the film.Our results indicate that the Ag(Nb,Ta)O_(3) film is a promising candidate for electrical energy storage applications. | Hongbo CHENG Xiao ZHAI Jun OUYANG Limei ZHENG Nengneng LUO Jinpeng LIU Hanfei ZHU Yingying WANG Lanxia HAO Kun WANG | 2023 | Journal of Advanced Ceramics2023，12，1： | 1 |
| 3 | Solidification Characteristics and Microstructure Evolution of Rapidly Solidified Cu Alloys显示文摘Cu60Ni40 alloy was taken as the research object.The alloy was undercooled by fluxing method and circulation superheating method,and the solidified samples with different undercoolings were obtained by natural cooling method.The solidification process of undercooled melt was photographed by highspeed camera,and the transformation of solidification front morphology was studied.The microstructure and morphology of all undercooled samples were analyzed.It is found that the microstructure and morphology of Cu60Ni40 alloy change through the evolution process of'coarse dendrite-equiaxed crystal-oriented fine dendrite-equiaxed crystal'with the undercooling.Finally,the electron backscatter diffraction characterization of 261 K grain refinement structure shows that recrystallization occurs in the grain refinement structure with high undercooling,such as high proportion of high angle grain boundaries,random orientation of equiaxed grains and a large number of annealing twins found in the microstructure. | 孔华野 TANG Cheng HE Xibin YANG Jin’e XIE Jinpeng WANG Hongfu | 2022 | Journal of Wuhan University of Technology(Materials Science)2022，37，6： | 0 |
| 4 | The protective effects of Levilactobacillus brevis FZU0713 on lipid metabolism and intestinal microbiota in hyperlipidemic rats显示文摘Levilactobacillus brevis FZU0713, a potential probiotic previously isolated from the traditional brewing process of Hongqu rice wine, may have the beneficial effects on improving lipid metabolism. This study aimed to evaluate the in vivo protective effects and possible mechanism of L. brevis FZU0713 on the disturbance of lipid metabolism in hyperlipidemic rats fed a high-fat diet(HFD). Results showed that oral administration of L. brevis FZU0713 could significantly inhibit obesity, ameliorate the lipid metabolism disorder, including serum/liver biochemical parameters and hepatic oxidative stress in HFD-fed rats. Histopathological result also indicated that dietary intervention of L. brevis FZU0713 could reduce the accumulation of lipid droplets in liver induced by 8 weeks HFD feeding. Furthermore, L. brevis FZU0713 intervention significantly increased the fecal levels of short-chain fatty acids(SCFAs, including acetate, propionate, butyrate, isobutyrate, valerate and isovalerate)in HFD-fed rats, which may be closely related to the changes of intestinal microbial composition and metabolic function. Intestinal microbiota profiling by 16S rRNA gene sequencing revealed that L. brevis FZU0713 intervention significantly altered the relative abundance of Coprococcus, Butyricicoccus, Intestinimonas, Lachnospiraceae FCS020 group, Ruminococcaceae_NK4A214 group, Ruminococcaceae_UCG-005 and UCG-014 at genus levels. Based on Spearman's rank correlation coefficient, serum and liver lipid metabolism related biochemical parameters were positively correlated with genera Ruminococcus, Pediococcus and Lachnospiraceae, but negatively correlated with genera Pseudoflavonifractor, Butyricicoccus and Intestinimonas. Furthermore, liver metabolomics analysis demonstrated that L. brevis FZU0713 had a significant regulatory effect on the composition of liver metabolites in hyperlipidemic rats, especially the levels of some important biomarkers involved in the metabolic pathways of arachidonic acid metabolism, primary bile acid biosynthesis, amino sugar and nucleotide sugar metabolism, taurine and hypotaurine metabolism, biosynthesis of unsaturated fatty acid, fructose and mannose metabolism, tyrosine metabolism, etc. Additionally, oral administration of L. brevis FZU0713 significantly regulated the mR NA levels of liver genes(including Acat2, Acox1, Hmgcr, Cd36, Srebp-1c and Cyp7a1)involved in lipid metabolism and bile acid homeostasis. In conclusion, our findings provide the evidence that L. brevis FZU0713 has the potential to improve disturbance of lipid metabolism by regulating intestinal microflora and liver metabonomic profile. Therefore, L. brevis FZU0713 may be used as a potential probiotic strain to produce functional food to prevent hyperlipidemia. | Xiaoyun Fan Qing Zhang Weiling Guo Qi Wu Jinpeng Hu Wenjian Cheng Xucong Lü Pingfan Rao Li Ni Youting Chen Lijiao Chen | 2023 | Food Science and Human Wellness2023，12，5： | 0 |
| 5 | Recalescence Behavior, Solidification Characteristics and Microstructure Transformation of Rapidly Solidified Undercooled Cu-based Alloys显示文摘The undercooled solidification microstructures of Cu55Ni45,Cu55Ni43Co2,and Cu60Ni38Co2 Cu-base alloys were obtained by fluxing method.Using infrared temperature measuring device,the law of the change of the recalescence degree with the increase of the undercooling during rapid solidification was studied.At the same time,high-speed camera was used to capture and photograph the images of solid/liquid interface migration during rapid solidification of undercooled melt,and the morphology evolution of solidification front was discussed.Finally,the microstructure morphology and transformation process of the Cubased alloys were systematically analyzed.It is found that the microstructure morphology of the alloys goes through the same evolution process and appeared two grain refinement phenomena,that is,“coarse dendrite-equiaxed grain-oriented fine dendrite-equiaxed grain”.But its characteristics undercoolingΔT_(1),ΔT_(2),and critical undercoolingΔT^(*)varies.Electron backscatter diffraction(EBSD)and transmission electron microscopy(TEM)were used to characterize the grain refinement structure with high undercooling.EBSD results show that the grain refinement structure with high undercooling presents a very high proportion of high angle grain boundaries,the grain orientation is random and there is no high strength texture,and a large number of annealing twins,which indicates that recrystallization occurs in the structure.TEM results show that dislocation network and stacking fault density are relatively low in most areas of grain refinement structure with high undercooling,which can confirm the theory that stress induces recrystallization of the structure. | 王洪福 TANG Cheng HE Xibin YANG Jin’e XIE Jinpeng | 2022 | Journal of Wuhan University of Technology(Materials Science)2022，37，6： | 0 |
| 6 | AHNAK2 is a biomarker and a potential therapeutic target of adenocarcinomas显示文摘Adenocarcinoma is the second largest histological type of cervical cancer,second only to cervical squamous cell carcinoma.At present,despite the clinical treatment strategies of cervical adenocarcinoma and cervical squamous cell carcinoma being similar,the outcome and prognosis of cervical adenocarcinoma are significantly poor.Therefore,it is urgent to find specific biomarker and therapeutic target for cervical adenocarcinoma.In this study,we aim to reveal and verify the potential biomarkers and therapeutic targets of cervical adenocarcinoma.Weighted correlation network analysis(WGCNA)reveals the differentially-expressed genes significantly related to the histological characteristics of the two cervical cancer subtypes.We select the genes with the top 20 significance for further investigation.Through microarray and immunohistochemical(IHC)analyses of a variety of tumor tissues,we find that among these 20 genes,AHNAK2 is highly expressed not only in cervical adenocarcinoma,but also in multiple of adenocarcinoma tissues,including esophagus,breast and colon,while not in normal gland tissues.In vitro,AHNAK2 knockdown significantly inhibits cell proliferation and migration of adenocarcinoma cell lines.In vivo,AHNAK2 knockdown significantly inhibits tumor progression and metastasis of various adenocarcinomas.RNA-sequencing and bioinformatics analyses suggest that the inhibitory effect of AHNAK2 knockdown on tumor progression is achieved by regulating DNA replication and upregulating Bim expression.Together,we demonstrate that AHNAK2 is a biomarker and a potential therapeutic target for adenocarcinomas. | Meng Xu Anyi Cheng Liya Yu Wei Wei Jinpeng Li Cheguo Cai | 2022 | Acta Biochimica et Biophysica Sinica2022，54，11： | 0 |
| 7 | Numerical Analysis of Flow-Induced Vibration and Noise Generation in a Variable Cross-Section Channel显示文摘Flow channels with a variable cross-section are important components of piping system and are widely used in variousfields of engineering.Using afinite element method and modal analysis theory,flow-induced noise,mode shapes,and structure-borne noise in such systems are investigated in this study.The results demonstrate that the maximum displacement and equivalent stress are located in the part with variable cross-sectional area.The aver-age excitation force on theflow channel wall increases with theflow velocity.The maximum excitation force occurs in the range of 0–20 Hz,and then it decreases gradually in the range of 20–1000 Hz.Additionally,as theflow velocity rises from 1 to 3 m/s,the overall sound pressure level associated with theflow-induced noise grows from 49.37 to 66.37 dB.Similarly,the overall sound pressure level associated with the structure-borne noise rises from 40.27 to 72.20 dB.When theflow velocity is increased,the increment of the structure-borne noise is higher than that of theflow-induced noise. | Youhao Wang Chuntian Zhe Chang Guo Jinpeng Li Jinheng Li Shen Cheng Zitian Wu Suoying He Ming Gao | 2023 | Fluid Dynamics & Materials Processing2023，19，12： | 0 |
| 8 | Preliminary Breeding of Superior Maize Combinations in Zhaotong,Yunnan显示文摘[Objectives]This study was conducted to select superior maize combinations.[Methods]With the control maize variety Haihe 2 in the middle altitude area of Yunnan Province as the control,adopting a single-factor randomized block three-replicate experiment design,a one-year field cultivation experiment was carried out in Luyin Village,Yongfeng Town,Zhaoyang District,Zhaotong City.[Results]A total of 11 new superior maize combinations including ZT-1 and ZT-2 were obtained.Through comprehensive comparison analysis with Haihe 2(CK),we selected six superior combinations of ZT-1,ZT-3,ZT-4,ZT-6,ZT-7 and ZT-9,which showed overall performance better than the control Haihe 2(CK)in terms of resistance,yield,and ear traits.[Conclusions]The selected 6 superior combinations have promotion value,and are recommended for higher-level trials and demonstrations. | Shimin WANG Jianjun LIU Dongyang KAN Xuangui CHEN Shijun ZHANG Xianzhu HE Jinpeng CHENG | 2021 | Agricultural Biotechnology2021，10，3： | 0 |
| 9 | Improved damage tolerance and oxidation resistance of (Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)–SiC by introducing chopped carbon fibers显示文摘High-entropy diborides(HEBs)are considered as promising high-temperature structure materials owing to their high melting point and excellent thermal stability.However,the intrinsic brittleness is the main obstacle that seriously limits their practical applications.To overcome with this obstacle,carbon fibers(Cf)with outstanding mechanical properties are used in the present work as a first attempt to improve the damage tolerance of HEBs.The as-prepared C_(f)/(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)–SiC composite(C_(f)/HEB–SiC)shows high relative density(97.9%)and good mechanical properties with flexural strength of 411±3 MPa and fracture toughness of 6.15±0.11 MPa·m^(1/2).More importantly,the damage tolerance parameter(Dt)has increased from 0.10 m^(1/2) for HEB–SiC to 0.29 m^(1/2) for C_(f)/HEB–SiC.Through microstructural analysis and Vickers indentation of the composite,the toughening mechanisms are disclosed.The carbon fibers coated with carbon coatings demonstrate unique capacity for prolonging the crack propagation path,which promotes the reliability of the composite effectively.Moreover,the C_(f)/(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)–SiC composite also exhibits good static oxidation resistance in the temperature range of 1100–1500℃in air due to the formation of the protective oxide layer constituting of multicomponent oxides(Zr)HfTiO4 and(Zr)Hf_(6)Ta_(2)O_(17) embedded in a continuous SiO_(2) glass.These results are promising,and this primary work can be used as a reference to the synthesis of C_(f)/HEBs for thermal protection materials under hightemperature serving conditions. | Feilong Huang Hailong Wang Cheng Fang Mingliang Li Gang Shao Jinpeng Zhu Yanchun Zhou | 2024 | Journal of Advanced Ceramics2024，13，1： | 0 |
| 10 | A peptide chain release factor 2a gene regulates maize kernel development by modulating mitochondrial function显示文摘Mitochondrial protein translation that is essential for aerobic energy production includes four essential steps of the mitochondrial ribosome cycle,namely,initiation,elongation,termination of the polypeptide,and ribosome recycling.Translation termination initiates when a stop codon enters the A site of the mitochondrial ribosome where it is recognized by a dedicated peptide release factor(RF).However,RFs and mechanisms involved in translation in plant mitochondria,especially in monocotyledons,remain largely unknown.Here,we identified a crumpled kernel(crk5 allele)mutant,with significantly decreased kernel size,100-kernel weight,and an embryo-lethal phenotype.The Crk5 allele was isolated using map-based cloning and found to encode a mitochondrial localization RF2a.As it is an ortholog of Arabidopsis mitochondrial RF2a,we named the gene ZmmtRF2a.ZmmtRF2a is missing the 5th–7th exons in the crk5 resulting in deletion of domains containing motifs GGQ and SPF that are essential for release activity of RF,mitochondrial ribosome binding,and stop codon recognition.Western blot and qRT-PCR analyses indicate that the crk5 mutation results in abnormal mitochondrion structure and function.Intriguingly,we observed a feedback loop in the crk5 with up-regulated transcript levels detected for several mitochondrial ribosome and mitochondrial-related components,in particular mitochondrial complexes CI,CIV,and a ribosome assembly related PPR.Together,our data support a crucial role for ZmmtRF2a in regulation of mitochondrial structure and function in maize. | Hui Zhang Yijian Feng Kunyang Song Guofang Li Jiao Jin Jingjing Gao Yongtian Qin Hongqiu Wang Jinpeng Cheng Zonghua Liu Jihua Tang Zhiyuan Fu | 2023 | The Crop Journal2023，11，6： | 0 |
| 11 | ZmCYP90D1 regulates maize internode development by modulating brassinosteroid-mediated cell division and growth显示文摘Plant height(PH)is associated with lodging resistance and planting density,which is regulated by a complicated gene network.In this study,we identified a spontaneous dwarfing mutation in maize,m30,with decreased internode number and length but increased internode diameter.A candidate gene,ZmCYP90D1,which encodes a member of the cytochrome P450 family,was isolated by map-based cloning.ZmCYP90D1 was constitutively expressed and showed highest expression in basal internodes,and its protein was targeted to the nucleus.A G-to-A substitution was identified to be the causal mutation,which resulted in a truncated protein in m30.Loss of function of ZmCYP90D1 changed expression of hormoneresponsive genes,in particular brassinosteroid(BR)-responsive genes which is mainly involved in cell cycle regulation and cell wall extension and modification in plants.The concentration of typhasterol(TY),a downstream intermediate of ZmCYP90D1 in the BR pathway,was reduced.A haplotype conferring dwarfing without reducing yield was identified.ZmCYP90D1 was inferred to influence plant height and stalk diameter via hormone-mediated cell division and cell growth via the BR pathway. | Canran Sun Yang Liu Guofang Li Yanle Chen Mengyuan Li Ruihua Yang Yongtian Qin Yongqiang Chen Jinpeng Cheng Jihua Tang Zhiyuan Fu | 2024 | The Crop Journal2024，12，1： | 0 |
| 12 | Barrier Lyapunov Function-Based Finite-Time Dynamic Surface Control for Output-Constrained Nonstrict-Feedback Systems显示文摘This paper investigates a finite-time tracking problem for the uncertainty nonlinear systems in nonstrict-feedback form,in which the output signal is restricted in a region.Based on the barrier Lyapunov function and dynamic surface control scheme,a novel adaptive neural controller is proposed by using the finite-time Lyapunov technology.Unlike the aforementioned literature on finite time tracking control,the violation of system output constraint is avoided by combining the barrier Lyapunov function method with finite-time theory.The structural characteristics of neural network is introduced to expand the adaptive neural finite-time backstepping method to the uncertainty nonlinear systems in the non-strict form.Correspondingly,the dynamic surface control is introduced to cope with the problem of“explosion of complexity”inherent in conventional backstepping scheme.It is shown that the designed controller can achieve finite-time tracking control and all the variables in the closed-loop system are bounded with output constraint guaranteed form stability analysis and simulation results. | YU Jinpeng FU Cheng LIU Jiapeng MA Yumei | 2023 | Journal of Systems Science & Complexity2023，36，2： | 0 |
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