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First experimental demonstration of coherent beam combining of more than 100 beams

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Photonics Research 2020年第12期8卷 1943-1948页

作者： HONGxiANG CHANG QI CHANG jiachao xi TIANYUE HOU RONGTAO SU PENGFEI MA JIAN WUCAN LI MAN JIANG YANxiNG MA PU ZHOU College of Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China

Coherent beam combining of 107 beams has been demonstrated for the first time to the best of our *** the system was in closed loop,the pattern in far-field was stable and the fringe contrast was>96%.The impact of the dynamic tilt error,the piston error,and power inconsistency was theoretically ***,the distribution law of dynamic tilt error was estimated and the correlation of the tilt dithering of different axis was analyzed *** ratio of power in the central lobe was^22.5%.The phase residue error in the closed loop was~λ∕22,which was evaluated by the root-mean-square error of the signal generated from the photoelectric detector.

关键词： error beam coherent

基于新型子孔径形状的高占空比孔径填充阵列相干合成

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激光与光电子学进展 2019年第4期56卷 152-157页

作者：奚加超支冬马阎星司磊国防科技大学前沿交叉学科学院湖南长沙410073

提出了基于2种新型子孔径形状的填充方案,相较于传统圆形子孔径正六边形排列填充方案,所提方案能获得更高的面积填充占比。通过评估相干合成的远场光束质量,权衡光束截断导致的能量损耗与占空比改善带来的光束质量提升,计算得到最优解... 详细信息

提出了基于2种新型子孔径形状的填充方案,相较于传统圆形子孔径正六边形排列填充方案,所提方案能获得更高的面积填充占比。通过评估相干合成的远场光束质量,权衡光束截断导致的能量损耗与占空比改善带来的光束质量提升,计算得到最优解。仿真结果表明,相比于圆形子孔径正六边形排列填充方案,所提2种方案能将远场桶中功率占比分别提升9.2%和13.9%。所提孔径填充优化方案对提高光纤激光阵列分孔径相干合成效率具有一定的指导意义。

关键词：激光光学光纤激光阵列孔径填充占空比截断系数

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N个衰减片杂斑特性表征及抑制方法

光学学报 2021年第5期41卷 13-19页

作者：向洪刚王睿奚加超侯孝成刘利纯国防科技大学前沿交叉学科学院湖南长沙410073 脉冲功率激光技术国家重点实验室湖南长沙410073 高能激光技术湖南省重点实验室湖南长沙410073

在分析单个衰减片、一对类V字型排列的衰减片、一对平行型排列的衰减片光斑分裂特征的基础上,给出N个衰减片使用时,光斑能量分裂、分裂光斑各级中心间距及重叠部分的表征方法。探寻出2种有效的解决方案,并给出详细的设计方法、使用方法... 详细信息

在分析单个衰减片、一对类V字型排列的衰减片、一对平行型排列的衰减片光斑分裂特征的基础上,给出N个衰减片使用时,光斑能量分裂、分裂光斑各级中心间距及重叠部分的表征方法。探寻出2种有效的解决方案,并给出详细的设计方法、使用方法。研究结果表明:存在最优入射角,可使各级杂斑间距最大,对于折射率为1.4~1.7的常用的衰减片介质材料,最优入射角为48°~50°;充分利用类V字型、平行型组合衰减片的光路传输特点,合理摆放衰减片、科学使用光阑,可有效去除各级杂斑,获得理想的单一主光斑。

关键词：几何光学激光功率衰减杂光表征衰减片排列抑制方法

Suppressed Internal Intrinsic Stress Engineering in High-Performance Ni-Rich Cathode Via Multi layered In Situ Coating Structure

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Energy & Environmental Materials 2024年第2期7卷 58-66页

作者： jiachao Yang Yunjiao Li xiaoming xi Junchao Zheng Jian Yu Zhenjiang He School of Metallurgy and Environment Central South UniversityChangsha 410083China Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083China Changsha Research Institute of Mining and Metallurgy Changsha 410083China Ningbo Ronbay New Energy Technol Co Ltd Tanjialing East Rd 39Ningbo 315400China

LiNi_(x)Co_(y)Al_(z)O_(2)(NCA)cathode materials are drawing widespread attention,but the huge gap between the ideal and present cyclic stability still hinders their further commercial application,especially for the Ni-rich LiNi_(x)Co_(y)Al_(z)O_(2)(x>0.8,x+y+z=1)cathode material,which is owing to the structural degradation and particles'intrinsic *** tackle the problems,Li_(0.5)La_(2)Al_(0.5)O_(4)in situ coated and Mn compensating doped multilayer LiNi_(0.82)Co_(0.14)Al_(0.04)O_(2)was *** refinement indicates that La-Mn co-modifying could realize appropriate Li/Ni disorder *** results and in situ XRD patterns reveal that the LLAO coating layer could effectively restrain crack in secondary particles benefited from the suppressed internal *** further improves as NCA-LM2 has superior mechanical *** SEM,TEM,XPS tests indicate that the cycled cathode with LLAO-Mn modification displays a more complete morphology and less side reaction with *** was used to further investigate cathode-electrolyte interface which was reflected by gas ***-LM2 releases less CO_(2)than NCA-P indexing on a more stable *** modified material presents outstanding capacity retention of 96.2%after 100 cycles in the voltage range of 3.0-4.4 V at 1C,13%higher than that of the pristine and 80.8%at 1 C after 300 *** excellent electrochemical performance could be attributed to the fact that the high chemically stable coating layer of Li_(0.5)La_(2)Al_(0.5)O_(4)(LLAO)could enhance the interface and the Mn doping layer could suppress the influence of the lattice mismatch and *** believe that it can be a useful strategy for the modification of Ni-rich cathode material and other advanced functional material.

关键词： compensating doped in situ coating multilayer material Ni-rich cathode materials suppressed internal strain

External-to-internal synergistic strategy to enable multi-scale stabilization of LiCoO_(2)at high-voltage

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Journal of Energy Chemistry 2023年第1期76卷 516-527,I0013页

作者： Shuaipeng Hao Yunjiao Li jiachao Yang Shan Wang Zhouliang Tan xiaoming xi Zhenjiang He Panpan Zhang School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083HunanChina Changsha Research Institute of Mining and Metallurgy Changsha 410083HunanChina Office of Laboratory and Equipment Management Xinjiang UniversityUrumqi 830000XinjiangChina

High-voltage LiCoO_(2)(LCO)offers a prelude to breaking the bottleneck of the energy density of lithium-ion batteries,however,LiCoO_(2)is subject to serious structural and interfacial degradation above voltages>4.55 V(***/Li^(+)).Herein,an in-situ Li_(6.25)La_(3)Zr_(2)A_(l0.25)O_(12)(LLZAO)layer is constructed on the LCO surface to achieve operating voltage at 4.6 *** detailed characterizations(ex-situ XRD,ex-situ Raman,DFT,etc.)reveal that the LLZAO layer greatly enhances Li+conductivity attributed to the ionconducting layer on the surface/interface,and closely combines with LiCoO_(2)particle to ensure stable cathode/electrolyte interface,thus suppressing the highly reactive Co^(4+)and O^(-)triggered surface side reactions at ***,the introduction of La^(3+)/Zr^(4+)/Al^(3+)with a larger ionic radius(La^(3+)/Zr^(4+)are larger than Co^(3+))and weaker electronegativity(La/Zr/Al are weaker than Co)into Co^(3+)sites readjusts the electron cloud density between Co–O–Li,which reinforces the Co–O bond and widens the band-center gap of Co 3d and O 2p,thus restraining the detrimental phase transition(from H3 to H1-3 phase)and the formation of Co_(3)O_(4)spinel phase(attributed to lattice oxygen release),subsequently alleviating the particle cracking and structural collapse during repeated Li^(+)de/***,after 100 cycles at 3.0–4.6 V,LCO@1.0LLZAO exhibits a superior discharge capacity of 188.5 m A h g^(-1),with a capacity retention of 85.1%.The above research has brought about meaningful guidance for the evolution of cathode materials with high voltage.

关键词： LLZAO layer High-voltage LiCoO_(2) Irreversible phase transition Band-center gap Lattice oxygen release

Novel pipe-roof method for a super shallow buried and large-span metro underground station

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Underground Space 2022年第1期7卷 134-150页

作者： Bo Lu jiachao Dong Wen Zhao xi Du Cheng Cheng Qian Bai Zhiguo Wang Mingcheng Zhao Jianyong Han School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China The School of Civil and Environmental Engineering University of New South WalesSydney 2052Australia The First Company of China Eighth Engineering Division Ltd Jinan 250014China School of Civil Engineering Shandong Jianzhu UniversityJinan 250101China

To address the inadequacies of traditional pipe-roof methods,the steel support cutting pipe method(SSCP)—a novel pipe-roof method that improves construction security and underground space usage—is *** further explore the applications of SSCP,its design scheme ought to be *** failure mode and mechanical behaviors of the SSCP were investigated through laboratory ***,a series of finite element models(FEMs)was established to study the deformation ***,the parameters of the steel support of the proposed structure were optimized using fuzzy *** results indicated the ultimate bearing capacity to be 366.8 kN,and the specimen began to yield when the external load reached 70%of the ultimate *** lon-gitudinal spacing of the steel supports,transverse steel support size,and vertical steel support size had significant effect on the vertical deformation of the steel support and the ground ***,the optimal combination of steel supports for the SSCP structure was obtained.

关键词： Steel support cutting pipe method Ground settlement Deformation characteristics Fuzzy mathematical theory Parameter optimization

Bioinspired engineering ADSC nanovesicles thermosensitive hydrogel enhance autophagy of dermal papilla cells for androgenetic alopecia treatment

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Bioactive Materials 2024年第6期36卷 112-125页

作者： jiachao xiong Zhixiao Liu Lingling Jia Yulin Sun Rong Guo Tingting xi Zihan Li Minjuan Wu Hua Jiang Yufei Li Department of Plastic Surgery Shanghai East HospitalSchool of MedicineTongji UniversityShanghai200120China Medical College Tongji UniversityShanghai200331China Department of Histology and Embryology Naval Medical UniversityShanghai200433China St Hugh’s College University of OxfordOX26LEUnited Kingdom

Androgenic alopecia(AGA)is a highly prevalent form of non-scarring alopecia but lacks effective *** cell exosomes have similar repair effects to stem cells,suffer from the drawbacks of high cost and low yield ***-derived nanovesicles acquired through mechanical extrusion exhibit favorable biomimetic properties similar to exosomes,enabling them to efficiently encapsulate substantial quantities of therapeutic *** this study,we observed that JAM-A,an adhesion protein,resulted in a significantly increased the adhesion and resilience of dermal papilla cells to form snap structures against damage caused by dihydrotestosterone and macrophages,thereby facilitating the process of hair regrowth in cases of ***,adipose-derived stem cells were modified to overexpress JAM-A to produce engineered JAM-A overexpressing nanovesicles(JAM-A^(OE)@NV).The incorporation of JAM-A^(OE)@NV into a thermosensitive hydrogel matrix(JAM-A^(OE)@NV Gel)to effectively addresses the limitations associated with the short half-life of JAM-A^(OE)@NV,and resulted in the achievement of a sustained-release profile for JAM-A^(OE)@*** physicochemical characteristics of the JAM-A^(OE)@NV Gel were analyzed and assessed for its efficacy in promoting hair regrowth in vivo and *** JAM-A^(OE)@NV Gel,thus,presents a novel therapeutic approach and theoretical framework for promoting the treatment of low cell adhesion diseases similar to AGA.

关键词： Androgenic alopecia Nanovesicles JAM-A Autophagy Hydrogel

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钢板削弱型叠层橡胶支座力学性能试验研究

浙江大学学报（工学版） 2024年第7期58卷 1436-1445,1478页

作者：马乾瑛李冰冰业嘉超长安大学建筑工程学院陕西西安710064 中国电力工程顾问集团西北电力设计院有限公司陕西西安710075

结合厚层橡胶支座和普通叠层橡胶支座的优点设计新型钢板削弱型叠层橡胶支座,通过调节环形钢板的总数和位置进行支座水平和竖向刚度的有效控制.选择3种中心橡胶层厚度的钢板削弱型叠层橡胶支座,分析所设计支座的滞回特性、刚度特性和耗... 详细信息

结合厚层橡胶支座和普通叠层橡胶支座的优点设计新型钢板削弱型叠层橡胶支座,通过调节环形钢板的总数和位置进行支座水平和竖向刚度的有效控制.选择3种中心橡胶层厚度的钢板削弱型叠层橡胶支座,分析所设计支座的滞回特性、刚度特性和耗能特性.基于串-并联模型,构建水平和竖向刚度的计算模型.试验结果表明,相比普通叠层橡胶支座,钢板削弱型叠层橡胶支座的水平和竖向刚度更低,水平和竖向耗能比更高,滞回曲线更光滑饱满.所建模型的计算结果与试验结果的一致性较好,误差绝对值不超过10%.所建模型在评估钢板削弱型叠层橡胶支座的水平和竖向刚度方面具有较高的精度和适用性.

关键词：橡胶支座钢板削弱串-并联模型三维隔震滞回特性

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基于正余弦的非线性哈里斯鹰优化算法

河南科技大学学报（自然科学版） 2024年第5期45卷 93-104,M0008页

作者：夏小刚彭嘉超西安科技大学理学院陕西西安710054

针对哈里斯鹰优化算法(HHO)收敛精度低、易陷入局部最优等问题,提出了一种基于正余弦的非线性哈里斯鹰优化算法(SCNHHO)。首先,采用佳点集策略对种群进行初始化,使种群分布更均匀,提高算法收敛速度和精度;其次,在探索阶段引入正余弦策略... 详细信息

针对哈里斯鹰优化算法(HHO)收敛精度低、易陷入局部最优等问题,提出了一种基于正余弦的非线性哈里斯鹰优化算法(SCNHHO)。首先,采用佳点集策略对种群进行初始化,使种群分布更均匀,提高算法收敛速度和精度;其次,在探索阶段引入正余弦策略,利用正余弦函数的震荡特性扩大搜索范围,寻求更多潜在的优质解;最后,在开发阶段引入非线性参数来平衡探索与开发,避免算法陷入局部最优。针对不同维度的基准测试函数进行性能测试,结合Wilcoxon秩和检验与Friedman检验的结果,将该算法与其他5个对比算法进行分析。结果表明,改进算法性能较原始HHO算法有较大提升,并且优于斑马优化算法(ZOA)、鲸鱼优化算法(WOA)和2种哈里斯鹰算法的变体(MHHO和IHHO),验证了改进策略的有效性。最后通过三杆桁架设计问题进一步验证了SCNHHO的实用性。

关键词：哈里斯鹰优化算法佳点集策略正余弦函数非线性参数 Wilcoxon秩和检验基准测试函数