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Synergistic modulation of Li nucleation/growth enabled by CNTswrapped lithiophilic CoP/Co_(2)P decorated hollow carbon polyhedron host for stable lithium metal anodes

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Nano Research 2023年第4期16卷 4961-4969页

作者： Zhicui Song Yuchi Liu zihao wang Jianxiong Xing Chaohui Wei Wei Zou Aijun Zhou Jingze Li School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China Research and Development Center Tianqi Lithium Co.Ltd.Chengdu 610093China Lithium Resources and Lithium Materials Key Laboratory of Sichuan Province Tianqi Lithium CorporationChengdu 610000China

Infinite volume expansion and uncontrolled lithium dendrite growth are the main bottlenecks that greatly hinder the commercial application of lithium metal anodes.Herein,derived from zeolitic imidazolate framework(ZIF)-67,carbon nanotubes(CNTs)-wrapped and CoP/Co_(2)P uniformly distributed nitrogen-doped hollow porous polyhedron carbon(CNT-CoP@NC)is elaborately designed as lithium metal host.A hybrid of N-doping and metallic phosphides modifications improves the lithiophilicity and reduces the nucleation barrier,consequently leading to homogeneous nucleation and smooth deposition of metallic lithium,thus suppresses the growth of Li dendrites.Meanwhile,self-generated CNTs arrays efficiently reduce the local current density.Moreover,the reduced lithium is preferentially deposited into the hollow structure of CNT-CoP@NC and then filled the voids among the CNT-CoP@NC particles.This all-pervasive Li plating design can not only alleviate the volume effect,but also maximize the anode space utilization.Benefiting from these synergistic modulations,even with an ultra-thin(7.2μm)anode layer of CNT-CoP@NC host,a high Coulombic efficiency for more than 400 cycles and an extended lifespan of 1,700 h under 1 mA·cm^(−2)can be achieved.When paired with a competitive high mass loading(17.1 mg·cm^(−2))LiFePO4 cathode,a superb cycling stability(126.7 mAh·g^(−1)over 550 cycles)is recorded at 1 C.

关键词： lithium metal anodes metal organic framework hollow structure dendrite-free synergistic modulations

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A wheat integrative regulatory network from large-scale complementary functional datasets enables trait-associated gene discovery for crop improvement

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Molecular Plant 2023年第2期16卷 393-414页

作者： Yongming Chen Yiwen Guo Panfeng Guan Yongfa wang Xiaobo wang zihao wang Zhen Qin Shengwei Ma Mingming Xin Zhaorong Hu Yingyin Yao Zhongfu Ni Qixin Sun Weilong Guo Huiru Peng Frontiers Science Center for Molecular Design Breeding Key Laboratory of Crop Heterosis and UtilizationBeijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China Hainan Yazhou Bay Seed Laboratory SanyaHainanChina State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina

Gene regulation is central to all aspects of organism growth,and understanding it using large-scale functional datasets can provide a whole view of biological processes controlling complex phenotypic traits in crops.However,the connection between massive functional datasets and trait-associated gene discovery for crop improvement is still lacking.In this study,we constructed a wheat integrative gene regulatory network(wGRN)by combining an updated genome annotation and diverse complementary functional datasets,including gene expression,sequence motif,transcription factor(TF)binding,chromatin accessibility,and evolutionarily conserved regulation.wGRN contains 7.2 million genome-wide interactions covering 5947 TFs and 127439 target genes,which were further verified using known regulatory relationships,condition-specific expression,gene functional information,and experiments.We used wGRN to assign genome-wide genes to 3891 specific biological pathways and accurately prioritize candidate genes associated with complex phenotypic traits in genome-wide association studies.In addition,wGRN was used to enhance the interpretation of a spike temporal transcriptome dataset to construct high-resolution networks.We further unveiled novel regulators that enhance the power of spike phenotypic trait prediction using machine learning and contribute to the spike phenotypic differences among modern wheat accessions.Finally,we developed an interactive webserver,wGRN(http://***/wGRN),for the community to explore gene regulation and discover trait-associated genes.Collectively,this community resource establishes the foundation for using large-scale functional datasets to guide trait-associated gene discovery for crop improvement.

关键词： wheat integrative gene regulatory network functional gene discovery phenotype prediction crop improvement

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Li-Ca Alloy Composite Anode with Ant-Nest-Like Lithiophilic Channels in Carbon Cloth Enabling High-Performance Li Metal Batteries

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Research 2022年第3期2022卷 343-353页

作者： zihao wang Yuchi Liu Jianxiong Xing Zhicui Song Aijun Zhou Wei Zou Fu Zhou Jingze Li School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China Research and Development Center Tianqi Lithium Co.Ltd.Chengdu 610093China

Constructing a three-dimensional(3D)multifunctional hosting architecture and subsequent thermal infusion of molten Li to produce advanced Li composite is an effective strategy for stable Li metal anode.However,the pure liquid Li is difficult to spread across the surface of various substrates due to its large surface tension and poor wettability,hindering the production and application of Li composite anode.Herein,heteroatomic Ca is doped into molten Li to generate Li-Ca alloy,which greatly regulates the surface tension of the molten alloy and improves the wettability against carbon cloth(CC).Moreover,a secondary network composed of CaLi2 intermetallic compound with interconnected ant-nest-like lithiophilic channels is in situ formed and across the primary scaffold of CC matrix by infiltrating molten Li-Ca alloy into CC and then cooling treatment(LCAC),which has a larger and lithiophilic surface to enable uniform Li deposition into interior space of the hybrid scaffold without Li dendrites.Therefore,LCAC exhibits a long-term lifespan for 1100 h under a current density of 5 mA cm^(-2)with fixed areal capacity of 5 mAh cm^(-2).Remarkably,full cells paired with practical-level LiFePO4 cathode of 2.45 mAh cm^(-2)deliver superior performance.

关键词： alloy intermetallic composite

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微腔光梳重频调控与光谱应用

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科学通报 2024年第12期69卷 1552-1564页

作者：王子皓杨昌喜鲍成英清华大学精密仪器系精密测量技术与仪器国家重点实验室北京100084

利用高品质因子(高Q)微腔中材料的光学非线性可以实现高相干微腔光梳的产生,这为光频梳系统的小型化和片上集成开辟了新的可能性.对于光学频率梳,梳齿间距是光频梳的关键参数,其与产生方式相关,反过来也影响了光梳的应用.芯片化的微腔... 详细信息

利用高品质因子(高Q)微腔中材料的光学非线性可以实现高相干微腔光梳的产生,这为光频梳系统的小型化和片上集成开辟了新的可能性.对于光学频率梳,梳齿间距是光频梳的关键参数,其与产生方式相关,反过来也影响了光梳的应用.芯片化的微腔光梳一般具有高重频的特点,这一特点适用于波分复用光通信、光计算、太赫兹波合成等应用.但对于精密光谱分析等应用,过大的梳齿间隔会带来光谱欠采样等问题,这一问题在中红外波段尤为明显.本文重点介绍了微腔光梳的重频调控,特别是其在光谱测量中的应用;简要分析了不同方式所产生光频梳的重频特点,以及不同应用对光梳重频的要求,特别是对双光梳测量系统;还介绍了微腔光梳与电光梳相结合的间隔光学差频(interleaved difference frequency generation,iDFG)技术,基于此技术可以实现GHz重频的中红外光梳的产生.将iDFG技术与相向传播(counter-propagating,CP)的孤子对相结合,可以实现中红外波段高相干、高分辨率的光谱测量.本文简要介绍了微腔光梳的发展,侧重于微腔光梳在光谱分析上的应用.

关键词：微腔光梳光学孤子双光梳测量重频

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TaMADS29 interacts with TaNF-YB1 to synergistically regulate early grain development in bread wheat

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Science China(Life Sciences) 2023年第7期66卷 1647-1664页

作者： Guoyu Liu Runqi Zhang Sen Li Rehmat Ullah Fengping Yang zihao wang Weilong Guo Mingshan You Baoyun Li Chaojie Xie Liangsheng wang Jie Liu Zhongfu Ni Qixin Sun Rongqi Liang Frontiers Science Center for Molecular Design Breeding(MOE) State Key Laboratory for AgrobiotechnologyState Key Laboratory of Plant Physiology and BiochemistryKey Laboratory of Crop Heterosis and Utilization(MOE)and Beijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing100193China

Grain development is a crucial determinant of yield and quality in bread wheat(Triticum aestivum L.).However,the regulatory mechanisms underlying wheat grain development remain elusive.Here we report how Ta MADS29 interacts with Ta NF-YB1 to synergistically regulate early grain development in bread wheat.The tamads29 mutants generated by CRISPR/Cas9 exhibited severe grain filling deficiency,coupled with excessive accumulation of reactive oxygen species(ROS)and abnormal programmed cell death that occurred in early developing grains,while overexpression of Ta MADS29 increased grain width and1,000-kernel weight.Further analysis revealed that Ta MADS29 interacted directly with Ta NF-YB1;null mutation in Ta NF-YB1caused grain developmental deficiency similar to tamads29 mutants.The regulatory complex composed of Ta MADS29 and Ta NF-YB1 exercises its possible function that inhibits the excessive accumulation of ROS by regulating the genes involved in chloroplast development and photosynthesis in early developing wheat grains and prevents nucellar projection degradation and endosperm cell death,facilitating transportation of nutrients into the endosperm and wholly filling of developing grains.Collectively,our work not only discloses the molecular mechanism of MADS-box and NF-Y TFs in facilitating bread wheat grain development,but also indicates that caryopsis chloroplast might be a central regulator of grain development rather than merely a photosynthesis organelle.More importantly,our work offers an innovative way to breed high-yield wheat cultivars by controlling the ROS level in developing grains.

关键词： chloroplast grain filling reactive oxygen species TaMADS29 TaNF-YB1 wheat(Triticum aestivum L.)

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Mechanical design of the horizontal collimator for HEPS storage ring

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Radiation Detection Technology and Methods 2022年第4期6卷 451-459页

作者： Liuxu Zong Haijing wang Chunhua Li Huamin Qu Lei Wu zihao wang Yaliang Zhao Guangyi Tang Hao Yang Na wang Haoyu Shi Institute of High Energy Physics Chinese Academy of ScienceBeijing 100049China Beijing Research Institute of Mechanical and Electrical Technology China Academy of Machinery Science and Technology GroupBeijing 100083China University of Chinese Academy of Science Beijing 100049China

Background Horizontal collimators in the storage ring of high energy photon source(HEPS)are used to localize the majority of the particle loss,making it possible to set local shields.Moreover,movable jaws of the collimators are also designed as beam dumps for the machine protection,to absorb and scatter the mis-steered beam.Because of the compact lattice,each collimator should be installed between the limited space of 240 mm in the beam direction.It is necessary for the collimators to have good thermal dissipation ability to endure the synchrotron radiation and HOM load,as well as good resistance to thermal-shock from sudden beam loss simultaneously,which brings great challenges to the design.Purpose The purpose of this paper is to introduce the designing scheme of the collimators in HEPS,including the structure design and the analyses of the key components.Method Thermal and mechanical calculation has been done,based on which the jaw structure has been optimized.Besides,the modal analysis of the whole magnet-collimator-support assembly has been studied to optimize the shields structure.Result Graphite will be used as the tip for movable jaws in the collimators,which is attached to copper by vacuum brazing.The maximum temperature of the jaw during normal operation is 131°C,while maximum stress of the graphite–copper weld joint is 15.6 MPa.Graphite tip can resist thermal shock caused by whole mis-steered beam.Eigen frequency of the standard assembly is acceptable for HEPS.Conclusion The results of calculations indicate that the present structure can work well for considered operating modes.

关键词： Collimator Structural design Finite element method(FEM)

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圈层结构视角下无形资产内在转化机制研究

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科研管理 2024年第1期45卷 153-161页

作者：胡川王子豪中南财经政法大学工商管理学院湖北武汉430073

无形资产对于提升企业核心竞争力,推动企业可持续发展具有重要的战略作用。然而已有文献在无形资产构成要素的转化研究方面存在不足。因此,本文将圈层结构理论引入无形资产管理领域,构建了由人力资本学习能力驱动的、由内而外逐层转化... 详细信息

无形资产对于提升企业核心竞争力,推动企业可持续发展具有重要的战略作用。然而已有文献在无形资产构成要素的转化研究方面存在不足。因此,本文将圈层结构理论引入无形资产管理领域,构建了由人力资本学习能力驱动的、由内而外逐层转化的无形资产圈层结构体系。另外,本文以我国A股高科技制造业企业2011—2019年数据为样本,构建了多元线性回归模型对这一圈层关系进行了实证检验,并探究了综合成本对这一关系的影响。实证结果表明无形资产内部具有由“人力资本类无形资产—技术类无形资产—商誉类无形资产”逐层转化的圈层特征。进一步研究发现,在综合成本上涨的背景下,人力资本类无形资产向商誉类无形资产的转化过程得到了进一步强化。在考虑自变量滞后一期、更换模型检验方法等稳健性检验后,上述结论依然成立。本文将圈层结构理论与无形资产研究相结合,从圈层结构视角出发进一步厘清了企业无形资产内部构成的转化机制和路径。研究结论在扩展无形资产的相关理论研究、深化无形资产内在转化机制的理解方面做出了贡献。

关键词：无形资产圈层体系人力资本类无形资产技术类无形资产商誉类无形资产综合成本

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Third-order polynomial model for analyzing stickup state laminated structure in flexible electronics

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Acta Mechanica Sinica 2018年第1期34卷 48-61页

作者： Xianhong Meng zihao wang Boya Liu Shuodao wang School of Aeronautic Science and Engineering Beihang University Beijing 100191 China School of Mechanical and Aerospace Engineering Oklahoma State University Stillwater OK 74078 USA

Laminated hard-soft integrated structures play a significant role in the fabrication and development of flexible electronics devices. Flexible electronics have advantageous characteristics such as soft and light-weight, can be folded,twisted, flipped inside-out, or be pasted onto other surfaces of arbitrary shapes. In this paper, an analytical model is presented to study the mechanics of laminated hard-soft structures in flexible electronics under a stickup state. Thirdorder polynomials are used to describe the displacement field,and the principle of virtual work is adopted to derive the governing equations and boundary conditions. The normal strain and the shear stress along the thickness direction in the bimaterial region are obtained analytically, which agree well with the results from finite element analysis. The analytical model can be used to analyze stickup state laminated structures, and can serve as a valuable reference for the failure prediction and optimal design of flexible electronics in the future.

关键词： Flexible electronics Stickup state Third-order polynomials Virtual work principle

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Analytical study of wrinkling in thin-film-on-elastomer system with finite substrate thickness

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Applied Mathematics and Mechanics(English Edition) 2017年第4期38卷 469-478页

作者： Xianhong MENG Guanyu LIU zihao wang Shuodao wang School of Aeronautic Science and Engineering Beihang University School of Mechanical and Aerospace Engineering Oklahoma State University

Surface wrinkling, a film bonded on a pre-strained elastomeric substrate can form periodic wrinkling patterns, is a common phenomenon in daily life. In existing theoretical models, the film is much thinner than the substrate so that the substrate can be considered to be elastomeric with infinite thickness. In this paper, the effect of finite substrate thickness is analyzed theoretically for free boundary condition cases. Based on the minimum potential energy principle, a theoretical model is established, and the wave length and amplitude of the wrinkling pattern are obtained. When the thickness of the substrate is more than 200 times larger than the thickness of the film, the results of this study agree well with the results obtained from the previous models for infinite substrate thickness. However, for thin substrates, the effect of finite substrate thickness becomes significant. The model given in this paper accurately describes the effect of finite substrate thickness, providing important design guidelines for future thin-film-on-substrate systems such as stretchable electronic devices.

关键词： wrinkling finite substrate thickness theoretical mechanics model

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Exact distributions for stochastic models of gene expression with arbitrary regulation

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Science China Mathematics 2020年第3期63卷 485-500页

作者： zihao wang Zhenquan Zhang Tianshou Zhou School of Mathematics Sun Yat-sen University

Stochasticity in gene expression can result in fluctuations in gene product levels. Recent experiments indicated that feedback regulation plays an important role in controlling the noise in gene expression.A quantitative understanding of the feedback effect on gene expression requires analysis of the corresponding stochastic model. However, for stochastic models of gene expression with general regulation functions, exact analytical results for gene product distributions have not been given so far. Here, we propose a technique to solve a generalized ON-OFF model of stochastic gene expression with arbitrary(positive or negative, linear or nonlinear) feedbacks including posttranscriptional or posttranslational regulation. The obtained results, which generalize results obtained previously, provide new insights into the role of feedback in regulating gene expression. The proposed analytical framework can easily be extended to analysis of more complex models of stochastic gene expression.

关键词： gene expression ON-OFF model feedback regulation chemical master equation stationary distribution

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