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Influence of transition metals(Sc,Ti,V,Cr,and Mn)doping on magnetism of CdS

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Chinese Physics B 2020年第11期29卷 485-491页

作者： Zhongqiang Suo Jianfeng Dai Shanshan gao haoran gao School of Science Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Nanoferrous Metals Lanzhou 730050China

The influence of transition metals(Sc,Ti,V,Cr,and Mn)doping at different distances on the magnetism of CdS is studied by using generalized gradient approximation combined with Hubbard U in the VASP *** results show that the doping systems are more stable,easy to form,and the wurtzite structure of CdS is not *** is found that the systems are antiferromagnetic(AFM)when nearest neighbor doping,which is attributed to the direct charge transfers between two impurity *** systems are ferromagnetic(FM)when the doping distance increases further,since the double exchange interactions are observed among the 3d orbital of the transition metal,the Cd-5s and the S-3p orbitals are at conduction band *** also found that the total magnetic moment of each ferromagnetic system increases with the order of SC to Mn-doping,the spin polarizability of Cr-doping system is 100%.The estimated Curie temperature indicates that the Cr-and Mn-doped CdS in this paper can achieve room-temperature ferromagnetic characteristics,especially the Cr doping is the most *** TM-doping does not destroy the semiconductor characteristics of the ***,the TM-doped CdS can be used as an ideal dilute magnetic semiconductor functional material.

关键词： transition metals doping electronic structure magnetism CdS Curie temperature

倾向性评分匹配分析硬膜囊内型腰椎间盘突出症的相关危险因素

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中国组织工程研究 2025年第15期29卷 3199-3205页

作者：高浩然张鹤龄贾方林郭迪经历史耀洲宋汉林高啸冯虎徐州医科大学附属医院江苏省徐州市221000 徐州市中心医院江苏省徐州市221009 徐州矿务集团总医院江苏省徐州市221006

背景:根据腰椎间盘组织突出的不同位置可以将其分为诸多类型,其中硬膜囊内型腰椎间盘突出症患者的临床症状严重,极大影响患者的生活质量,因此研究其发病的危险因素,提高术前诊断率,对该病的治疗与预防具有重要意义。目的:探讨硬膜囊内... 详细信息

背景:根据腰椎间盘组织突出的不同位置可以将其分为诸多类型,其中硬膜囊内型腰椎间盘突出症患者的临床症状严重,极大影响患者的生活质量,因此研究其发病的危险因素,提高术前诊断率,对该病的治疗与预防具有重要意义。目的:探讨硬膜囊内型腰椎间盘突出症发生的危险因素。方法:回顾性分析徐州市3家医院自2014年5月至2022年11月收治的囊内型腰椎间盘突出症患者15例(突入组),并运用倾向性评分按照1∶4的比例与未突入硬膜的腰椎间盘突出症患者进行匹配,共筛选出59例纳入未突入组。观察两组临床资料,采用单因素和二元逻辑回归分析、多元线性回归、PROBIT回归分析法明确硬膜囊内型腰椎间盘突出症的相关危险因素。结果与结论:①单因素分析结果示,突入组与未突入组的平均病程、突出节段、改良Pfirrmann分级、骶骨倾斜角、既往腰椎手术史占比、重体力劳动占比、腰椎管狭窄占比、马尾神经冗余占比及后纵韧带骨化占比相比,差异均有显著性意义(P<0.05);②多因素回归分析显示病程时间、突出节段、腰椎手术史、改良Pfirrmann分级、马尾神经冗余、腰椎管狭窄是发生硬膜囊内型腰椎间盘突出症的独立危险因素;③根据影响因素构建的受试者工作特征曲线图显示,曲线下面积为0.956(95%CI:0.913-0.998),具有较好的区分度;④提示病程时间、突出节段、腰椎手术史、改良Pfirrmann分级、马尾神经冗余、腰椎管狭窄与硬膜囊内型腰椎间盘突出症的发病率存在显著相关性。

关键词：硬膜囊内型腰椎间盘突出症腰椎间盘突出症倾向性评分匹配危险因素受试者工作特征曲线

Analysis of dark soliton generation in the microcavity with mode-interaction

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Chinese Physics B 2021年第2期30卷 330-335页

作者： Xin Xu Xueying Jin Jie Cheng haoran gao Yang Lu Liandong Yu School of Instrument Science and Opto-electronics Engineering Hefei University of TechnologyHefei 230009China

Mode-interaction plays an important role in the dark soliton generation in the microcavity. It is beneficial to the excitation of dark solitons, but also facilitates a variety of dark soliton states. Based on the non-normalized Lugiato-Lefever equation, the evolution of dark soliton in the microcavity with mode-interaction is investigated. By means of mode-interaction, the initial continuous wave(CW) field evolves into a dark soliton gradually, and the spectrum expands from a single mode to a broadband comb. After changing the mode-interaction parameters, the original modes which result in dual circular dark solitons inside the microcavity, are separated from the resonant mode by 2 free spectral ranges(FSR). When the initial field is another feasible pattern of weak white Gaussian noise, the large frequency detuning leads to the amplification of the optical power in the microcavity, and the mode-interaction becomes stronger. Then, multiple dark solitons, which correspond to the spectra with multi-FSR, can be excited by selecting appropriate mode-interaction parameters. In addition, by turning the mode-interaction parameters, the dark soliton number can be regulated, and the comb tooth interval in the spectrum also changes accordingly. Theoretical analysis results are significant for studying the dark soliton in the microcavity with mode-interaction.

关键词： dark soliton microcavity mode-interaction

Controllable two-dimensional Kerr and Raman–Kerr frequency combs in microbottle resonators with selectable dispersion

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Photonics Research 2021年第2期9卷 171-180页

作者： XUEYING JIN XIN XU haoran gao KEYI WANG HAOJIE XIA LIANDONG YU School of Instrument Science and Opto-electronics Engineering Hefei University of TechnologyHefei 230009China Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026China

We report a broadband two-dimensional(2 D) Kerr and Raman–Kerr frequency comb generation in a silica bottle resonator accounting for azimuthal and axial degrees of freedom and pioneer a method that allows for controlled and reversible switching between a four wave mixing(FWM) state and a stimulated Raman scattering state. The repetition rate of the Raman–Kerr comb is not an integer number of the free spectral range, which spans more than 242 nm with hundreds of teeth. We show that, experimentally and numerically, multiple 2 D comb regimes can be selectively accessed via dispersion engineering by exciting different orders of axial modes or modifying the curvature of the axial profile, involving cascaded FWM, Raman lasing, and Raman-assisted FWM. The effect of axial curvature on dispersion is associated with the axial mode number in bottle resonators. Our approach enables dispersion and spectral engineering flexibility in any resonator with localized axial modes.

关键词： resonator dispersion curvature

Surface-enhanced Raman spectroscopy chips based on two-dimensional materials beyond graphene

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Journal of Semiconductors 2021年第5期42卷 38-47页

作者： Enqing Zhang Zhengkun Xing Dian Wan haoran gao Yingdong Han Yisheng gao Haofeng Hu Zhenzhou Cheng Tiegen Liu1 21School of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China Key Laboratory of Opto-electronics Information Technology Ministry of EducationTianjin 300072China Department of Electrical Engineering The Hong Kong Polytechnic UniversityHong KongChina Department of Chemistry The University of TokyoTokyo 113-0033Japan

Surface-enhanced Raman spectroscopy(SERS) based on two-dimensional(2 D) materials has attracted great attention over the past decade. Compared with metallic materials, which enhance Raman signals via the surface plasmon effect, 2 D materials integrated on silicon substrates are ideal for use in the fabrication of plasmon-free SERS chips, with the advantages of outstanding fluorescence quenching capability, excellent biomolecular compatibility, tunable Fermi levels, and potentially lowcost material preparation. Moreover, recent studies have shown that the limits of detection of 2 D-material-based SERS may be comparable with those of metallic substrates, which has aroused significant research interest. In this review, we comprehensively summarize the advances in SERS chips based on 2 D materials. As several excellent reviews of graphene-enhanced Raman spectroscopy have been published in the past decade, here, we focus only on 2 D materials beyond graphene, i.e., transition metal dichalcogenides, black phosphorus, hexagonal boron nitride, 2 D titanium carbide or nitride, and their heterostructures. We hope that this paper can serve as a useful reference for researchers specializing in 2 D materials, spectroscopy, and diverse applications related to chemical and biological sensing.

关键词： Raman spectroscopy surface-enhanced Raman spectroscopy two-dimensional materials

Blazed subwavelength grating coupler

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Photonics Research 2023年第2期11卷 189-195页

作者： RONGXIANG GUO SHUJIAO ZHANG haoran gao GANAPATHY SENTHIL MURUGAN TIEGEN LIU ZHENZHOU CHENG School of Precision Instruments and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Optoelectronics Information Technology Ministry of EducationTianjin 300072China Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK Georgia Tech-Shenzhen Institute Tianjin UniversityShenzhen 518055China Department of Chemistry The University of TokyoTokyo 113-0033Japan

Short-wavelength mid-infrared(2–2.5 μm wave band) silicon photonics has been a growing area to boost the applications of integrated optoelectronics in free-space optical communications, laser ranging, and biochemical sensing. In this spectral region, multi-project wafer foundry services developed for the telecommunication band are easily adaptable with the low intrinsic optical absorption from silicon and silicon dioxide materials. However,light coupling techniques at 2–2.5 μm wavelengths, namely, grating couplers, still suffer from low efficiencies,mainly due to the moderated directionality and poor diffraction-field tailoring capability. Here, we demonstrate a foundry-processed blazed subwavelength coupler for high-efficiency, wide-bandwidth, and large-tolerance light coupling. We subtly design multi-step-etched hybrid subwavelength grating structures to significantly improve directionality, as well as an apodized structure to tailor the coupling strength for improving the optical mode overlap and backreflection. Experimental results show that the grating coupler has a recorded coupling efficiency of-4.53 dB at a wavelength of 2336 nm with a 3-dB bandwidth of ~107 nm. The study opens an avenue to developing state-of-the-art light coupling techniques for short-wavelength mid-infrared silicon photonics.

关键词： coupling directional grating

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肿瘤细胞代谢异常及其调控机制

中国科学：生命科学 2017年第1期47卷 132-139页

作者：魏浩然高平中国科学技术大学生命科学学院合肥230027

肿瘤细胞的异常代谢已成为肿瘤研究领域的共识.肿瘤细胞代谢重编程的发生是为了维持在恶劣微环境中的存活和无限增殖.因此,肿瘤细胞异常的代谢通路、代谢调控蛋白及代谢酶可能是肿瘤治疗的关键靶点.本文旨在介绍近年来肿瘤代谢的研究进... 详细信息

肿瘤细胞的异常代谢已成为肿瘤研究领域的共识.肿瘤细胞代谢重编程的发生是为了维持在恶劣微环境中的存活和无限增殖.因此,肿瘤细胞异常的代谢通路、代谢调控蛋白及代谢酶可能是肿瘤治疗的关键靶点.本文旨在介绍近年来肿瘤代谢的研究进展及肿瘤代谢研究对癌症治疗的意义.

关键词：肿瘤代谢代谢酶 Warburg效应

视觉显著性检测与金字塔变换相结合的图像融合

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计算机科学与探索 2015年第4期9卷 491-500页

作者：高浩然潘晨中国计量学院信息工程学院杭州310018

提出了一种利用人类视觉机制进行图像融合的算法。首先对源图像进行金字塔分解;接着对低频和高频分量采用不同的融合策略,低频分量依据最大显著性准则选择融合像素,高频分量利用相关性加权准则选择融合像素。初步融合后的低频和高频分... 详细信息

提出了一种利用人类视觉机制进行图像融合的算法。首先对源图像进行金字塔分解;接着对低频和高频分量采用不同的融合策略,低频分量依据最大显著性准则选择融合像素,高频分量利用相关性加权准则选择融合像素。初步融合后的低频和高频分量经金字塔重建获得最终融合结果。金字塔变换可提供多分辨率的图像表示,但不区分图像区域的重要性;而视觉显著性检测可定位图像最显著区域,但对噪声敏感;两算法的结合能取长补短,获得好的融合结果。实验表明,提出的方法优于已发表的其他基于金字塔变换的图像融合算法,适用于多聚焦图像、多波段图像和多光谱图像融合。

关键词：图像融合金字塔变换显著性检测

耕地行政保护的功能检视、规范反思与正当性建构

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中国土地科学 2023年第6期37卷 20-29页

作者：李玲玲高浩然西北农林科技大学人文社会发展学院陕西杨凌712100 陕西省农业法环境法研究中心陕西杨凌712100

研究目的:破解当下耕地行政保护“价值—规范”“需求—功能”的偏离问题,以实现耕地行政保护的正当性,为面向中国式现代化的耕地保护转型提供理论补足。研究方法:规范分析法,价值分析法。研究结果:一方面,在功能主义“需求—功能”视角... 详细信息

研究目的:破解当下耕地行政保护“价值—规范”“需求—功能”的偏离问题,以实现耕地行政保护的正当性,为面向中国式现代化的耕地保护转型提供理论补足。研究方法:规范分析法,价值分析法。研究结果:一方面,在功能主义“需求—功能”视角下,现有的《耕地保护法(草案)》等规范性文件无法满足耕地行政保护处罚、救济、公益等需求;另一方面,在规范主义“价值—规范”视角下,囿于整体性价值割裂、兼容性价值不足、防御性价值脆弱的局限,耕地行政保护价值基础缺失。研究结论:应当以“规范”为体,对耕地行政保护的价值基础在“功能为用”的导向下进行处罚、救济、公益等功能的拆解,以此具体实现《耕地保护法》主体构建、法规承继、责任细分的改造以及《土地管理法》等法规续造的规范协同,在协同后展开明确处罚范围、赋予耕地保护检察建议以强制力等保护措施,实现耕地行政保护的正当性建构。

关键词：耕地保护正当性价值拆解规范主义功能主义

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