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Six million Q factor micro fused silica shell resonator with teeth-like tines released by femtosecond laser-assisted chemical etching

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Science China(Technological Sciences) 2024年第6期67卷 1923-1932页

作者： zhao tao SHI Yan LU Kun XI Xiang WU XueZhong xiao DingBang College of Intelligence Science and Engineering National University of Defense TechnologyChangsha410073China

The quality factor(Q factor)is a crucial performance parameter for *** this paper,a novel release method for highquality micro fused silica shell resonators with teeth-like tines with good surface morphology is *** method is based on femtosecond laser-assisted chemical ***,the optimal energy range of femtosecond laser modification is obtained through mechanism ***,the optimal parameters for a straight line and arc pattern are determined by optimizing the average output power,processing speed,and processing *** results demonstrate why edge breakage in rounded corners is easy under different ***,according to these conclusions,the processing is performed on a micro fused silica shell resonator with a Q factor exceeding 6 *** addition,subsurface damage is rare throughout the fabrication process,and the surface roughness of the released cross section reaches the nanometer *** improved Q factor helps suppress mechanical thermal noise and reduce zero bias and zero bias drift,constituting the primary method for enhancing the performance of the resonant gyroscope.

关键词： micro hemispherical resonator fused silica laser-assisted chemical etching quality factor

Limits of Riemann Solutions for Isentropic MHD in a Variable Cross-Section Duct as Magnetic Field Vanishes

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Chinese Annals of Mathematics,Series B 2024年第4期45卷 637-660页

作者： Wancheng SHENG tao xiao Department of Mathematics Shanghai UniversityShanghai 200444China Shanghai Aircraft Design and Research Institute Shanghai 201210China.

The stability for magnetic field to the solution of the Riemann problem for the polytropic fluid in a variable cross-section duct is *** the vanishing magnetic field method,the stable solutions are determined by comparing the limit solutions with the solutions of the Riemann problem for the polytropic fluid in a duct obtained by the entropy rate admissibility criterion.

关键词： Variable duct Magnetogasdynamics Riemann problem Stability Vanishing magnetic field method

CRD-CGAN:category-consistent and relativistic constraints for diverse text-to-image generation

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Frontiers of Computer Science 2024年第1期18卷 61-75页

作者： tao HU Chengjiang LONG Chunxia xiao College of Intelligent Systems Science and Engineering Hubei Minzu UniversityEnshi 445000China School of Computer Science Wuhan UniversityWuhan 430072China Key Laboratory of Performing Art Equipment&System Technology Ministry of Culture and TourismBeijing 100007China Meta Reality Labs BurlingameCA94010USA

Generating photo-realistic images from a text description is a challenging problem in computer *** works have shown promising performance to generate synthetic images conditional on text by Generative Adversarial Networks(GANs).In this paper,we focus on the category-consistent and relativistic diverse constraints to optimize the diversity of synthetic *** on those constraints,a category-consistent and relativistic diverse conditional GAN(CRD-CGAN)is proposed to synthesize K photo-realistic images *** use the attention loss and diversity loss to improve the sensitivity of the GAN to word attention and ***,we employ the relativistic conditional loss to estimate the probability of relatively real or fake for synthetic images,which can improve the performance of basic conditional ***,we introduce a category-consistent loss to alleviate the over-category issues between K synthetic *** evaluate our approach using the Caltech-UCSD Birds-200-2011,Oxford 102 flower and MS COCO 2014 datasets,and the extensive experiments demonstrate superiority of the proposed method in comparison with state-of-the-art methods in terms of photorealistic and diversity of the generated synthetic images.

关键词： text-to-image diverse conditional GAN relativi-stic category-consistent

Towards catalytic reactions of Cu single-atom catalysts:Recent progress and future perspective

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Chinese Chemical Letters 2024年第2期35卷 197-207页

作者： Yitao zhao Lei tao Jiangsu Province Engineering Research Center of Special Functional Textile Materials Changzhou Vocational Institute of Textile and GarmentChangzhou 213164China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterSchool of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China

One of the urgent and challenging topics in diversified sustainable energy conversion is the development of high-performance,low-cost,and well durable *** single-atom catalysts(SACs)have become promising catalysts for diversified sustainable energy conversion due to their capability to maximize the utilization efficiency,acquire modulated electronic structure and optimized binding strength with *** this review,we have provided an interview of the recent progress achieved in the field of electrocatalysis,photocatalysis,and heterogeneous reaction based on Cu *** by this review,we have summarized some advanced synthetic strategies for the construction of Cu ***,the performance-improving strategies are discussed in terms of the coordination environments of the reaction center,reaction mechanism and selectivity,based on free energy diagram and electron structure ***,the remaining issues,challenges,and opportunities of Cu SACs are also provided,affording a perspective for future *** review not only offers us a deep understanding on the catalytic mechanism of Cu SACs for energy conversion,but also encourages more endeavors in prompting their practical application.

关键词： Cu SACs Energy conversion Catalysis Coordination environment

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云南省埃及伊蚊击倒抗性基因流行特征研究

中国媒介生物学及控制杂志 2024年第1期35卷 1-8页

作者：陈丽周克梅吴超赵晓涛董朝良尹小雄王炳辉姜进勇昆明理工大学生命科学与技术学院云南昆明650500 云南省热带传染病国际联合实验室云南省病媒生物学与控制国际联合实验室云南省虫媒传染病防控研究重点实验室云南省虫媒传染病防控关键技术创新团队云南省寄生虫病防治所云南普洱665000 德宏傣族景颇族自治州疾病预防控制中心云南芒市678400 瑞丽市疾病预防控制中心云南瑞丽678600

目的在云南省埃及伊蚊重点分布区,检测埃及伊蚊引起击倒抗性(kdr)的电压门控钠离子通道基因(VGSC)突变并分析,阐明VGSC基因流行特征。方法收集云南省盈江县、瑞丽市、镇康县、耿马傣族佤族自治县(耿马县)、勐海县、景洪市和勐腊县共7... 详细信息

目的在云南省埃及伊蚊重点分布区,检测埃及伊蚊引起击倒抗性(kdr)的电压门控钠离子通道基因(VGSC)突变并分析,阐明VGSC基因流行特征。方法收集云南省盈江县、瑞丽市、镇康县、耿马傣族佤族自治县(耿马县)、勐海县、景洪市和勐腊县共7个重点县(市)野生埃及伊蚊成蚊或幼蚊样本,直接测序法扩增VGSC部分基因片段,分析各位点突变率和联合突变构成情况。χ^(2)检验比较不同位点突变率和不同性别成蚊VGSC基因kdr突变的差异等。结果 7个县(市)共计561只(雌蚊276只、雄蚊242只和幼蚊43只)埃及伊蚊样本成功提取蚊DNA基因组并被用于kdr突变的检测,共发现VGSC中4个位点突变。每个县(市)均存在S989P、V1016G和F1534C突变,S989P突变率为71.43%~100%,均值为92.51%[95%置信区间(CI)90.33%~94.70%];V1016G突变率均为100%;F1534C突变率为55.81%~100%,均值为85.38%(95%CI:82.45%~88.32%);首次发现瑞丽市、耿马县和镇康县3个县(市)存在Y1527F位点突变(0~35.45%),均值为8.73%(95%CI:6.39%~11.08%)。同时存在4种联合突变类型:S989P+V1016G、V1016G+F1534C、S989P+V1016G+F1534C和S989P+V1016G+Y1527F+F1534C,未发现单个位点突变情况。除盈江县外的6个县(市)雌蚊与雄蚊分别进行989、1016、1527和1534位点突变率以及联合突变构成比的比较,差异均无统计学意义(均P>0.05)。结论云南省埃及伊蚊VGSC基因中kdr突变以多位点联合突变为主,且出现Y1527F新突变,应定期开展埃及伊蚊kdr突变监测,及时掌握其对杀虫剂靶标抗性变化规律。

关键词：埃及伊蚊电压门控钠离子通道击倒抗性突变联合突变云南省

Essentially Commuting Truncated Toeplitz Operators

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Acta Mathematica Sinica,English Series 2024年第10期40卷 2453-2480页

作者： Xi zhao tao YU School of Mathematics and Science Hebei GEO University School of Mathematical Sciences Dalian University of Technology

A model space is a subspace of the Hardy space which is invariant under the backward shift,and a truncated Toeplitz operator is the compression of a Toeplitz operator on some model space. In this paper we prove a necessary and sufficient condition for the commutator of two truncated Toeplitz operators on a model space to be compact.

关键词： 47B32 47B35 commutator compact operator maximal ideal space model space Truncated Toeplitz operator

Genetically-and environmentally-dependent processes drive interspecific and intraspecific divergence in the Chinese relict endemic genus Dipteronia

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Plant Diversity 2024年第5期46卷 585-599页

作者： tao Zhou xiaodan Chen Jordi López-Pujol Guoqing Bai Sonia Herrando-Moraira Neus Nualart xiao Zhang Yuemei zhao Guifang zhao Key Laboratory of Resource Biology and Biotechnology in Western China(Ministry of Education) College of Life SciencesNorthwest UniversityXi'an 710069China School of Pharmacy Xi'an Jiaotong UniversityXi'an 710061China College of Life Science Shanxi Normal UniversityTaiyuanChina Botanic Institute of Barcelona(IBB) CSIC-CMCNBBarcelona 08038CataloniaSpain Escuela de Ciencias Ambientales Universidad Espíritu Santo(UEES)Samborondón 091650Ecuador Shaanxi Engineering Research Centre for Conservation and Utilization of Botanical Resources Xi'an Botanical Garden of Shaanxi ProvinceXi'an 710061China School of Biological Sciences Guizhou Education UniversityGuiyangChina

China is a hotspot of relict plant species that were once widespread throughout the Northern *** research has demonstrated that the occurrence of long-term stable refugia in the mountainous regions of central and south-western China allowed their persistence through the late Neogene climate *** of these relict lineages is Dipteronia,an oligotypic tree genus with a fossil record extending to the ***,we investigated the genetic variability,demographic dynamics and diversification patterns of the two currently recognized Dipteronia species(Dipteronia sinensis and ***).Molecular data were obtained from 45 populations of Dipteronia by genotyping three cpDNA regions,two single copy nuclear genes and 15 simple sequence repeat *** genetic study was combined with niche comparison analyses on the environmental space,ecological niche modeling,and landscape connectivity *** found that the two Dipteronia species have highly diverged both in genetic and ecological *** the incipient speciation processes that can be observed in ***,the occurrence of long-term stable refugia and,particularly,a dispersal corridor along Daba Shan-west Qinling,likely ensured its genetic and ecological integrity to *** study will not only help us to understand how populations of Dipteronia species responded to the tectonic and climatic changes of the Cenozoic,but also provide insight into how Arcto-Tertiary relict plants in East Asia survived,evolved,and diversified.

关键词： Dipteronia Interspecific/intraspecific divergence Genetic structure Climatic niche divergence Dispersal corridor

Aberrant epithelial cell interaction promotes esophageal squamous-cell carcinoma development and progression

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Signal Transduction and Targeted Therapy 2024年第1期9卷 279-294页

作者： Liping Chen Shihao Zhu Tianyuan Liu Xuan zhao tao Xiang xiao Hu Chen Wu Dongxin Lin Department of Etiology and Carcinogenesis National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Key Laboratory of Cancer Genomic Biology Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Collaborative Innovation Center for Cancer Personalized Medicine Nanjing Medical UniversityNanjing 211166China CAMS Oxford Institute Chinese Academy of Medical SciencesBeijing 100006China Sun Yat-sen University Cancer Center State Key Laboratory of Oncology in South ChinaGuangzhou 510060China

Epithelial-mesenchymal transition(EMT)and proliferation play important roles in epithelial cancer formation and progression,but what molecules and how they trigger EMT is largely *** we performed spatial transcriptomic and functional analyses on samples of multistage esophageal squamous-cell carcinoma(ESCC)from mice and humans to decipher these critical *** investigating spatiotemporal gene expression patterns and cell–cell interactions,we demonstrated that the aberrant epithelial cell interaction via EFNB1-EPHB4 triggers EMT and cell cycle mediated by downstream SRC/ERK/AKT *** aberrant epithelial cell interaction occurs within the basal layer at early precancerous lesions,which expands to the whole epithelial layer and strengthens along the cancer development and *** analysis revealed that the aberrant EFNB1-EPHB4 interaction is caused by overexpressedΔNP63 due to TP53 mutation,the culprit in human ESCC *** results shed new light on the role of TP53-TP63/ΔNP63-EFNB1-EPHB4 axis in EMT and cell proliferation in epithelial cancer formation.

关键词： esophageal TP53 squamous

Editable semiconductor photo-electrodes for sustainable ammonia synthesis

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Nano Research 2024年第4期17卷 3107-3112页

作者： Ning Lan Kun Du Erling zhao Wei zhao tao Ling Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education Institute of New-EnergySchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China School of Materials Science and Engineering Tianjin Chengjian UniversityTianjin 300384China

Powered by an inexhaustible supply of solar energy,photoelectrochemical(PEC)nitrogen reduction reaction(NRR)provides an ideal solution for the synthesis of green ammonia(NH_(3)).Although great efforts have been made in the past decades,there are still significant challenges in increasing the NH_(3) yields of the PEC-NRR *** addition to the issues of low activity and selectivity similar to electrochemical NRR,the progress of PEC-NRR is also impeded by the limited increase in NH_(3) yields as the electrode is ***,we propose an editable electrode design strategy that parallels unit photo-electrodes to achieve a linear increase in NH_(3) yields with electrode active *** demonstrate that the editable electrode design strategy minimizes the electrode charge transfer resistance,allowing more photo-generated carriers to reach the electrode surface and promote the catalytic *** believe that this editable electrode design strategy provides an avenue to achieve sustainable PEC NH_(3) production.

关键词： editable electrode photoelectrochemical nitrogen reduction reaction parallel electrode ZnSe