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High-elevation Adaptation of Motion Visual Display Modifications in the Toad-Headed Agamid Lizards(Phrynocephalus)

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Asian Herpetological Research 2022年第1期13卷 53-63页

作者： Qiaohan HU Yusong LIN Xia qiu Jinzhong FU Yin QI Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 101400China Departments of Integrative Biology University of GuelphGuelphOntario N1G 2W1Canada

Understanding the process of adaptation is a key mission in modern evolutionary *** living at high elevations face challenges in energy meta bolism due to several environmental constraints(e.g., oxygen supply, food availa bility,and movement time). Animal behavioral processes are intimately related to energy meta bolism, and therefore, behavioral modifica tions are expected to be an important mechanism for high-elevation adaptation. We tested this behavioral adaptation hypothesis using va ria tions of motion visual displays in toad-headed agamid lizards of the genus Phr ynocephalus. We predicted tha t complexity of visual motion displays would decrease with the increase of elevation, because motion visual displays are energetically costly. Displays of 12 Phr ynocephalus species were collected with elevations ranging from sea level to 4600 m. We quantified display complexity using the number of display components, display duration, pathways of display components, as well as display speed for each species. Association between display complexity and elevation was analyzed using the phylogenetic generalized least squares(PGLS)model. We found that both the number of display components and the average value of tail coil speed were negatively correlated with elevation, suggesting that toad-headed lizards living at high-elevation areas reduced their display complexity to cope with the environmental constraints. Our research provides direct evidence for high-elevation adaptation from a behavioral aspect and illustrates the potential impacts of environment heterogeneity on motion visual display diversification.

关键词： high-elevation adaptation lizard motion visual display Phrynocephalus signal complexity

Localization effect in single crystal of RuAs2

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Chinese Physics B 2024年第4期33卷 620-625页

作者：易哲铠刘琪光双魁徐升岳小宇梁慧李娜周颖吴丹丹孙燕李秋菊程鹏夏天龙孙学峰王义炎 Anhui Key Laboratory of Magnetic Functional Materials and Devices Institute of Physical Science and Information TechnologyAnhui University Department of Physics and Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS) University of Science and Technology of China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices Renmin University of China School of Optical and Electronic Information Suzhou City University School of Physics and Optoelectronic Engineering Anhui University Collaborative Innovation Center of Advanced Microstructures Nanjing University

We report the magnetotransport and thermal properties of RuAs2single crystal. RuAs2exhibits semiconductor behavior and localization effect. The crossover from normal state to diffusive transport in the weak localization（WL） state and then to variable range hopping（VRH） transport in the strong localization state has been observed. The transitions can be reflected in the measurement of resistivity and Seebeck coefficient. Negative magnetoresistance（NMR） emerges with the appearance of localization effect and is gradually suppressed in high magnetic field. The temperature dependent phase coherence length extracted from the fittings of NMR also indicates the transition from WL to VRH. The measurement of Hall effect reveals an anomaly of temperature dependent carrier concentration caused by localization effect. Our findings show that RuAs2is a suitable platform to study the localized state.

关键词： weak localization variable range hopping RuAs_2 single crystal

高分子医用材料设计性实验教学探索——以“光固化3D打印立体网络水凝胶支架”为例

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高分子通报 2024年第6期37卷 836-845页

作者：纪倩于小健周怡雯邱立朋陈曦陈敬华江南大学生命科学与健康工程学院无锡214122 江南大学机械工程学院无锡214122

将前沿性的科学技术引入本科实验教学已成为高校教学改革的趋势之一。3D打印作为一种新兴的制造技术,在高分子材料成型加工领域具有良好的应用价值。在生物医用材料方面,通过3D打印可以设计并制备出与患者受损组织区域相同或相似的三维... 详细信息

将前沿性的科学技术引入本科实验教学已成为高校教学改革的趋势之一。3D打印作为一种新兴的制造技术,在高分子材料成型加工领域具有良好的应用价值。在生物医用材料方面,通过3D打印可以设计并制备出与患者受损组织区域相同或相似的三维修复材料,以实现精准化和个性化医疗。结合生物医药特色,学院开展了以3D打印高分子医用材料为研究主题的设计性实验教学项目,为学生提供自主学习和实践的平台。本文采用数字光处理(DLP) 3D打印技术对光敏材料甲基丙烯酰化明胶(GelMA)和聚乙二醇二丙烯酸酯(PEGDA)进行光固化处理,制备三维网络水凝胶支架,打印的样品结构完整,孔道连通,孔径与模型相符。分析空间结构和材料配方对水凝胶支架性能的影响,结果显示500μm孔径的GelMA-PEGDA立体网络水凝胶具有较好的力学性、溶胀性以及稳定性。该设计性实验涉及多学科知识交叉融合,为师生带来了一种全新的教学体验,也为创新型人才的培养提供了一种新的思路。

关键词： 3D打印高分子材料光敏材料水凝胶设计性实验

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NOMA-Based Collaborative Beam Hopping Frequency Allocation Mechanism for Future LEO Satellite Systems

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China Communications 2023年第6期20卷 321-338页

作者： Fei Zheng Zhao Pi Zou Zhou Miao Ye Hongbing qiu Ministry of Education Key Laboratory of Cognitive Radio and Information Processing Guilin University of Electronic TechnologyGuilin 541004China State key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

Low Earth orbit(LEO) satellite systems provide terrestrial users with services that are not limited by geographical location. However, the conflict between existing allocation schemes and the business variability between beams is becoming increasingly prominent. Beam hopping technology allows for a more flexible and versatile approach to satellite resource allocation. This paper proposes a beam hopping pattern optimization scheme that jointly considers the interference threshold distance and beam service priority, reducing the inter-beam co-channel interference(CCI). In the cluster area, a non-orthogonal multiple access(NOMA)-based collaborative beam hopping(NCBH) scheme is proposed to minimize the cell-edge user(CEU) interference. Since there is a difference in channel gain between the CEU and cellcenter user(CCU), this scheme forms a NOMA cluster to perform power domain multiplexing and formulates a NOMA cluster pairing strategy according to the user location to reduce the CCI of the CEU. After NOMA cluster pairing, the optimal carrier frequency of the NOMA cluster is selected by a reinforcement learning algorithm. The simulation results verify the excellent performance of the proposed NCBH scheme regarding the user’s received power, transmission rate, and outage probability.

关键词： LEO satellite beam hopping NOMA resource allocation

Impact of film thickness in laser-induced periodic structures on amorphous Si films

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Frontiers of Optoelectronics 2023年第2期16卷 117-124页

作者： Liye Xu Jiao Geng Liping Shi Weicheng Cui Min qiu College of Optical Science and Engineering Zhejiang University Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Key Laboratory of Coastal Environment and Resources of Zhejiang Province (KLaCER) School of EngineeringWestlake University Institute of Advanced Technology Westlake Institute for Advanced Study Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology

We report self-organized periodic nanostructures on amorphous silicon thin films by femtosecond laser-induced oxidation. The dependence of structural periodicity on the thickness of silicon films and the substrate materials is investigated. The results reveal that when silicon film is 200 nm, the period of self-organized nanostructures is close to the laser wavelength and is insensitive to the substrates. In contrast, when the silicon film is 50 nm, the period of nanostructures is much shorter than the laser wavelength, and is dependent on the substrates. Furthermore, we demonstrate that, for the thick silicon films, quasi-cylindrical waves dominate the formation of periodic nanostructures, while for the thin silicon films, the formation originates from slab waveguide modes. Finite-difference time-domain method-based numerical simulations support the experimental discoveries.

关键词： Laser-induced periodic surface structures (LIPSS) Ultrafast optoelectronics Laser nanofabrication Quasi-cylindrical waves

一株香蕉枯萎病菌拮抗菌的筛选鉴定及盆栽防治效果

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西南农业学报 2024年第7期37卷 1522-1530页

作者：韦锡昌林蓝慧蒙姣荣李界秋王忠文广西大学农学院南宁530004 广西大学农牧产业发展研究院南宁530004

[目的]从香蕉根际土壤等材料中分离筛选获得对香蕉枯萎病菌有抑制作用的拮抗菌,为香蕉枯萎病生物防治提供理论基础及菌株资源。[方法]采用稀释平板分离法,从香蕉枯萎病罹病土壤、桑蚕和发酵藻等材料中分离得到微生物,再分别采用平板划... 详细信息

[目的]从香蕉根际土壤等材料中分离筛选获得对香蕉枯萎病菌有抑制作用的拮抗菌,为香蕉枯萎病生物防治提供理论基础及菌株资源。[方法]采用稀释平板分离法,从香蕉枯萎病罹病土壤、桑蚕和发酵藻等材料中分离得到微生物,再分别采用平板划线法和单孢分离法对细菌、真菌进行分离和纯化,以香蕉枯萎病菌亚热带4号生理小种(Foc STR4)为靶标菌,采用平板对峙法进行拮抗菌的筛选试验,对抑制效果最好的菌株进行基因测序鉴定、生理生化指标测定;以只接种Foc STR4为对照进行防治香蕉枯萎病的盆栽试验。[结果]从罹病的香蕉根际土壤中筛选得到1株对Foc STR4有明显抑制效果的拮抗细菌TU3-1,抑制率为56.18%,在试验中发现TU3-1对香蕉炭疽病菌等其他13种供试植物病原菌有抑制作用,其中对香蕉炭疽病菌的抑制效果最好,抑制率为75.99%。盆栽试验结果显示,与只接种Foc STR4处理相比,对香蕉枯萎病的防治效果为51.81%。经基因测序、序列比对和生理生化实验观测,TU3-1菌株被鉴定为贝莱斯芽孢杆菌属(Bacillus),该菌株为革兰氏阳性菌,厌氧性,可水解淀粉和纤维素,产生氨气和蛋白酶,最适宜培养基为PDA培养基,最适培养温度为30℃,最适生长pH为7。[结论]筛选鉴定得到1株对Foc STR4抑制率为56.18%、对香蕉枯萎病防治效果为51.81%的拮抗细菌TU3-1,被鉴定为***,TU3-1对其他10种植物病原真菌及3种植物病原细菌也有抑制作用,表现出广谱抑菌活性,可进一步开发作为生防菌种质资源。

关键词：香蕉香蕉枯萎病菌拮抗菌贝莱斯芽孢杆菌

心房颤动患者华法林抗凝治疗初期发生抗凝过度的影响因素研究

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中国全科医学 2024年第3期27卷 308-314页

作者：范彩霞李娇魏延津郭德群刘存飞李峥嵘邱石山东省临沂市人民医院药学部 276000 康复大学青岛医院(青岛市市立医院)药学部山东省青岛市266011 山东省临沂市人民医院心血管内科 276000 航天中心医院(北京大学航天临床医学院)神经内科北京市100049

背景心房颤动发病率高,是引起脑卒中、心血管疾病及全因死亡的重要危险因素,而适当的抗凝治疗是预防心房颤动相关性卒中的核心。华法林仍然是目前主要的抗凝药物,但其治疗窗较窄,固定剂量的华法林在治疗初期很容易导致过度或抗凝治疗不... 详细信息

背景心房颤动发病率高,是引起脑卒中、心血管疾病及全因死亡的重要危险因素,而适当的抗凝治疗是预防心房颤动相关性卒中的核心。华法林仍然是目前主要的抗凝药物,但其治疗窗较窄,固定剂量的华法林在治疗初期很容易导致过度或抗凝治疗不足,既往华法林抗凝过度的临床研究较少。目的分析心房颤动患者华法林抗凝治疗初期发生抗凝过度的流行病学和临床特征,并探讨发生抗凝过度的影响因素。方法该研究为单中心回顾性队列研究。纳入2017年1月—2022年12月临沂市人民医院收治的行华法林2.5 mg/d治疗的心房颤动患者552例为研究对象,收集患者临床资料,包括年龄、性别、体质量、心房颤动类型(非瓣膜型/瓣膜型)、合并疾病(高血压、糖尿病、低蛋白血症、转氨酶异常、心力衰竭)、联合用药情况(联合用药数量、联用抗菌药物、联用胺碘酮),收集患者治疗前实验室检查结果,包括血清白蛋白(Alb)、血清肌酐(Scr)、血清丙氨酸氨基转移酶(ALT)及血清天门冬氨酸氨基转移酶(AST)水平,收集患者治疗前国际标准化比值(INR)和用药7 d后INR。根据华法林治疗7 d后INR是否>3.0将患者分为抗凝过度组(INR>3.0,n=122)和未抗凝过度组(INR≤3.0,n=430),比较两组患者资料,并采用单因素及多因素Logistic回归分析探究华法林抗凝治疗初期发生抗凝过度的影响因素。结果抗凝过度组患者年龄,女性、瓣膜型心房颤动、低蛋白血症、转氨酶异常比例,联合用药数量,联用胺碘酮比例,AST高于未抗凝过度组;体质量、高血压比例、糖尿病比例、Alb、ALT低于未抗凝过度组(P5种(OR=1.976,95%CI=1.175~3.323,P=0.010)、Scr≥91μmol/L(OR=2.087,95%CI=1.222~3.561,P=0.007)是心房颤动患者华法林抗凝治疗初期发生抗凝过度的独立危险因素,而糖尿病(OR=0.424,95%CI=0.191~0.939,P=0.034)是心房颤动患者华法林抗凝治疗初期发生抗凝过度的保护因素。结论年龄≥65岁、体质量≤63 kg、联合用药数量>5种、Scr≥91μmol/L可能是心房颤动患者华法林抗凝治疗初期发生抗凝过度的危险因素,而糖尿病可能是心房颤动患者华法林抗凝治疗初期发生抗凝过度的保护因素。对于高龄、低体质量、多种药物联合使用、Scr水平升高的华法林抗凝治疗患者应密切监测INR水平。

关键词：心房颤动华法林国际标准化比值抗凝过度危险因素 Logistic模型

Texture and inhibitor features of grain-oriented pure iron produced by different cold-rolling processes

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Journal of Iron and Steel Research(International) 2018年第10期25卷 1026-1032页

作者： Jian-jun Deng Hai-jun Wang Zhe Rong Li xiang Sheng-tao qiu Yong Gan National Engineering Research Center of Continuous Casting Technology Central Iron and Steel Research Institute Beijing 100081 China Wuyang Iron and Steel Co. Ltd. Hebei Iron and Steel Group Wuyang 462400 Hebei China School of Metallurgical Engineering Anhui University of Technology Ma'anshan 243032 Anhui China

To promote the manufacture of grain-oriented pure iron, the texture and inhibitor features of two samples A and B produced by different cold-rolling processes were studied by optical microscopy, X-ray diffraction, and transmission electron microscopy. The results showed that a higher content of inhibitor elements directly resulted in a greater number of fine inhibitors, which exhibited strong inhibitory ability, leading to more fine precipitates of appropriate size effectively inhibiting the growth of primary grains in decarburized bands （sheets） during the single-stage cold-rolling process. The formation of the component with { 110}〈001〉 Goss orientation was greatly suppressed in the stage of primary recrystallization, and this component could hardly be observed in the decarburized band; by contrast, the {411 }〈148〉-oriented grains grew. During the process of high-temperature annealing, abnormal growth occurred and secondary recrystallized grains （Goss orientation） merged with other matrix grains such as { 111 }〈112〉 and {411 }〈148〉. The magnetic induction of samples A and B at 800 Aim was 1.939 T and 1.996 T, respectively.

关键词： Grain-oriented pure iron Microstructure Texture Inhibitor Cold rolling

血小板功能指标对阿司匹林在老年缺血性脑卒中二级预防中预测价值

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脑与神经疾病杂志 2024年第7期32卷 458-462页

作者：王儒彬马筱洁邱进陈伟新疆维吾尔自治区人民医院输血科乌鲁木齐830000

目的探讨血小板功能指标(血小板计数、平均血小板体积、血小板体积分布宽度)检测对阿司匹林在老年IS二级预防中的预测价值。方法选取2020年3月至2022年3月新疆维吾尔自治区人民医院192例IS患者,所有患者均接受规范化IS治疗,并给予阿司... 详细信息

目的探讨血小板功能指标(血小板计数、平均血小板体积、血小板体积分布宽度)检测对阿司匹林在老年IS二级预防中的预测价值。方法选取2020年3月至2022年3月新疆维吾尔自治区人民医院192例IS患者,所有患者均接受规范化IS治疗,并给予阿司匹林二级预防,对比治疗前、治疗1年后患者血小板功能指标。观察老年IS患者阿司匹林二级预防效果,依据1年内IS复发情况将其分为复发组与未复发组,对比两组基线资料及血小板功能指标,建立Logistic回归模型筛选IS复发的影响因素,绘制受试者工作曲线(ROC)分析治疗前血小板功能指标对老年IS复发的预测价值。结果治疗1年后,患者血小板计数、平均血小板体积、血小板体积分布宽度低于治疗前(P未复发组(P1,P<0.05);ROC结果显示,血小板计数、平均血小板体积、血小板体积分布宽度预测老年IS患者复发的AUC=0.715、0.701、0.704,具有一定预测价值,联合检测预测价值更高(AUC=0.808)。结论血小板功能指标对阿司匹林在老年IS二级预防效果具有一定预测价值,能够对患者进行风险分层,指导个性化治疗。

关键词：缺血性脑卒中阿司匹林血小板计数平均血小板体积血小板体积分布宽度二级预防