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点播影院系统及设备安全级别测试分析

电视技术 2022年第10期46卷 200-202页

作者：张文胜胡猛李维善韩东孙井顺秦皇岛美视达视听检测技术有限公司河北秦皇岛066000 河北省数字影像装备与数字显示技术重点实验室河北秦皇岛066000 秦皇岛视听机械研究所有限公司河北秦皇岛066000

主要介绍点播影院系统及相关设备安全级别测试的主要内容及相关理论,分别从影片内容加密、影片打包、播放器认证与授权、显示设备链路安全、物理安全及数字水印六个方面对安全级别的测试方法进行分析解读,并对标准中存在的问题及测试过... 详细信息

主要介绍点播影院系统及相关设备安全级别测试的主要内容及相关理论,分别从影片内容加密、影片打包、播放器认证与授权、显示设备链路安全、物理安全及数字水印六个方面对安全级别的测试方法进行分析解读,并对标准中存在的问题及测试过程中发现的一些问题进行了简单的说明。随着相关规范的不断完善,较低安全级别的设备会慢慢地被淘汰出局,点播影院行业也会越来越规范化。

关键词：点播影院设备安全级别数字证书

Hydrodynamics study of dolphin’s self-yaw motion realized by spanwise flexibility of caudal fin

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Journal of Ocean Engineering and Science 2022年第3期7卷 213-224页

作者： Zhihan li Dan Xia Jiabo Cao weishan Chen Xingsong Wang School of Mechanical Engineering Southeast UniversityNanjingJiangsu 211189China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150080China

The hydrodynamic performance of the virtual underwater vehicle under self-yaw is investigated numerically in this paper,we aim to explore the fluid laws behind this plane motion achieved by the bionic flexibility,especially the spanwise flexibility of the caudal *** kinematics of the chordwise flexible body and the spanwise flexible caudal fin are explored through dynamic mesh technology and user-defined functions(UDF).The 3-D Navier-Stokes equations are applied to simulate the viscid fluid surrounding the bionic *** study focuses on quantitative problems about the fluid dynamics behind the specific motion law,including speed of movement,energy loss and working *** current results show that the self-yaw can be composed of two motions,autonomous propulsion and active *** addition,the degree of the flexible caudal fin can produce different yaw *** chordwise phase differenceФis dominant in the propulsion function,while the spanwise phase differenceδhas a more noticeable effect on the steering *** pressure distribution on the surface of the dolphin and the wake vortex generated in the flow field reasonably reveal the evolution of *** properly turns out that the dolphin can combine the spanwise flexible caudal fin and the chordwise flexible body to achieve self-yaw motion.

关键词： Self-yaw dolphin Spanwise flexibility Caudal fin Numerical simulation Hydrodynamic performance

A terbium activated multicolour photoluminescent phosphor for luminescent anticounterfeiting

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Journal of Rare Earths 2020年第10期38卷 1039-1043,I0001页

作者： Jun Ma Yumiao li weishan Hu Wenxiang Wang Jiachi Zhang Jianhong Yang Yuhua Wang National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology Lanzhou UniversityLanzhou 730000China

The multicolor photoluminescence(PL) of a Tb3+singly activated NaYGeO4 phosphor is prepared by solid state *** the first time,it is reported that the PL color of Tb3+in NaYGeO4 phosphor can be tuned from green to blue and,finally,to red by controlling the Tb3+*** optimal tricolor phosphors are NaYGeO4:0.01 mol% Tb3+(red),NaYGeO4:0.5 mol% Tb3+(blue) and NaYGeO4:5 mol% Tb3+(green),*** PL properties of the NaYGeO4:Tb3+ phosphor were studied in *** results reveal that the PL color modulations of the NaYGeO4:Tb3+phosphor are essentially due to the cross-relaxation effect of Tb3+,and a possible mechanism on the cross-relaxation is *** to these unique features,a multicolor PL image was fabricated based on the NaYGeO4:Tb3+ phosphor for potential applications in luminescent anticounterfeiting.

关键词： Multicolour Luminescence Phosphor Rare earths

Force/Moment Isotropy of 8/4-4 Parallel Six-Axis Force Sensor Based on Performance Atlases

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第6期35卷 1018-1026页

作者： Song weishan li Chenggang Wang Chunming Song Yong Wu Zefeng Rajnathsing Hemant College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics

A six-axis force sensor with parallel 8/4-4 structure is introduced and its measurement principle is *** on condition numbers of Jacobian matrix spectral norm of the sensor,the relationship between the force and moment isotropy and some structural parameters is *** test methods are used to determine the degree of primary and secondary factors that have significant effect on sensor ***,the relationship between each performance index and the structural parameters of the sensor is analyzed by the method of the atlas,which lays a foundation for structural optimization design of the force sensor.

关键词： six-axis force sensor Jacobian matrix condition number isotropy orthogonal test indices atlases

优质高产籼粳杂交稻嘉丰优3号的选育及制种技术

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浙江农业科学 2024年第4期65卷 780-784页

作者：金浩晶曹郁青郑利欣厉伟杉马强董国军浙江可得丰种业有限公司浙江磐安322300 中国水稻研究所水稻生物育种全国重点实验室浙江杭州310006

嘉丰优3号是嘉兴市农业科学研究院联合中国水稻研究所、浙江可得丰种业有限公司,以嘉禾112A(长粒型粳稻三系不育系)为母本与G1143(中籼迟熟型恢复系)为父本选育的三系杂交水稻新组合。该组合具有高产、优质、中抗稻瘟病等优势,于2021年... 详细信息

嘉丰优3号是嘉兴市农业科学研究院联合中国水稻研究所、浙江可得丰种业有限公司,以嘉禾112A(长粒型粳稻三系不育系)为母本与G1143(中籼迟熟型恢复系)为父本选育的三系杂交水稻新组合。该组合具有高产、优质、中抗稻瘟病等优势,于2021年4月通过浙江审定(浙审稻2021019),2021—2023年先后通过了江西省[(赣)引种〔2021〕第001号]、安徽省(皖引稻2021066)、福建省[(闽)引种〔2022〕第1号]、湖北省(鄂引种2022055)的引种备案,适宜在长江中下游地区作中稻种植。文章介绍了嘉丰优3号的选育过程、特征特性、高产栽培及制种技术等。

关键词：优质高产籼粳杂交稻嘉丰优3号选育制种技术

Design of a linear-rotary ultrasonic motor for optical focusing inspired by the bionic motion principles of the earthworms

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International Journal of Smart and Nano Materials 2022年第2期13卷 346-365页

作者： Yingzhi Wang Jie Deng Shijing Zhang He li weishan Chen Yingxiang liu State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbinHeilongjiang ProvinceChina

Multi-motor configuration of multi-DOF(degree of freedom)optical system is a major source of redundant structure,putting a limitation on the simple and miniaturized ***,a novel two-DOF ultrasonic motor(USM)is proposed to provide a feasible method of application in the lens autofocus of the optical *** proposed USM operates by one longitudinal mode and two orthogonal bending modes,which is inspired by the bionic motion principle of the *** frequency degeneration among the three working modes is per-formed,and the working principle of the USM is verified via the FEM simulation.A prototype of the two-DOF USM is fabricated,and its mechanical output characteristics are *** experimental results indicate that the prototype achieves the maximum rotary and linear speeds of 3319.6 rpm and 57.6 mm/s,***,we demonstrate the result of a simple focusing experiment using the prototype and obtain a series of clear pictures,which verifies the feasibility of application in the optical focusing system.

关键词： Ultrasonic motor bondedtype two-DOF motions optical focusing bionic motion

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雌二醇水平降低对大鼠唾液腺的影响

医学研究杂志 2010年第3期39卷 56-58,143页

作者：朱建华李琛刘继光李维善商维荣库莉博黑龙江省佳木斯大学口腔医学院 154002

目的探索雌二醇水平与大鼠唾液腺之间的关系。方法 32只雌性Wister大鼠随机分为4组:对照组、假手术组、去势组和去势并给予雌激素组。摘除雌大鼠卵巢形成绝经期大鼠模型,通过检测血清雌二醇水平,观察各组大鼠唾液腺组织的HE切片和Cu,Zn-... 详细信息

目的探索雌二醇水平与大鼠唾液腺之间的关系。方法 32只雌性Wister大鼠随机分为4组:对照组、假手术组、去势组和去势并给予雌激素组。摘除雌大鼠卵巢形成绝经期大鼠模型,通过检测血清雌二醇水平,观察各组大鼠唾液腺组织的HE切片和Cu,Zn-SOD的表达量来综合分析雌二醇水平降低对鼠唾液腺的影响。结果与对照组、假手术组和去势并给予雌激素组相比,去势组雌二醇水平明显降低(P<0.01)。组织形态学变化发现,去势并给予雌激素组腮腺腺泡发生空泡性变性;颌下腺浆液性腺导管上皮有轻度嗜酸性变化,管腔变小;舌下腺无明显变化。而去势组更为严重。免疫组化结果显示对照组和假手术组的腮腺组织中Cu,Zn-SOD呈现强阳性;颌下腺的浆液性腺导管上皮呈现强阳性,舌下腺为弱阳性。去势组和去势并给予雌激素组表达弱于对照组和假手术组,去势组表达最弱。结论雌激素水平降低对唾液腺组织有影响,而Cu,Zn-SOD参与了保护唾液腺组织的正常结构的过程。

关键词：雌二醇卵巢摘除唾液腺铜锌超氧化物歧化酶

Rosin side chain type catalyst-free vitrimers with high cross-link density,mechanical strength,and thermal stability

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Frontiers of Chemical Science and Engineering 2023年第9期17卷 1267-1279页

作者： Yunpeng Shen weishan Tang Jinyang li Zhijun Ke lirong liao Peng Yang Yuntao Lu Xiaoping Rao College of Chemical Engineering Huaqiao UniversityXiamen361021China Academy of Advanced Carbon Conversion Technology Huaqiao UniversityXiamen361021China

The emergence of vitrimer,a new class of polymer materials can address the problem of recyclability,reprocess ability and recyclability of thermosetting ***,a natural product,is an ideal raw material for the preparation of polymers in a more sustainable ***,due to the huge steric hindrance caused by the hydrogenated phenanthrene ring structure,the cross-link density of materials is frequently *** this study,hydrogenated rosin was adopted for preparing hydrogenated rosin side-chain type diacids,which were reacted with mixed epoxy to obtain rosin side-chain type *** was completely characterized by differential scanning calorimetry test,thermogravimetric analysis,shape memory test and self-healing *** prepared vitrimers exhibited good self-healing properties,excellent heat resistance(T_(d)=352℃)as well as high mechanical properties(tensile strength of 46.75 MPa).The tricyclic diterpene structure of rosin was introduced into the side chain in order to avoid the reduction of cross-link density resulting from the huge steric hindrance of the rigid tricyclic hydrophenylene *** can undergo dynamic transesterification reaction without external catalysts due to the autocatalytic effect of tertiary amines from ***,our work expanded the application field of rosin,increased the added value of rosin,and provided a novel method for preparing rosin-based vitrimers with ideal properties.

关键词： vitrimers rosin catalyst-free high mechanical properties dynamic transesterification reaction

聚桂醇注射联合自体浓缩生长因子治疗下肢静脉性溃疡的临床效果

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中国医学创新 2020年第5期17卷 65-68页

作者：王香梅邹松云刘坡张荣刚李维珊柯昌能广东省深圳市龙华区中心医院广东深圳518110

目的:探索聚桂醇注射联合自体浓缩生长因子治疗下肢静脉性溃疡的临床效果。方法:选取2017年10月-2019年1月本院收治的60例单侧下肢静脉性溃疡患者,按照入院单双日分为观察组30例(59条肢体)和对照组30例(56条肢体)。观察组应用聚桂醇注... 详细信息

目的:探索聚桂醇注射联合自体浓缩生长因子治疗下肢静脉性溃疡的临床效果。方法:选取2017年10月-2019年1月本院收治的60例单侧下肢静脉性溃疡患者,按照入院单双日分为观察组30例(59条肢体)和对照组30例(56条肢体)。观察组应用聚桂醇注射液联合自体浓缩生长因子治疗,对照组单纯采用聚桂醇注射方法进行治疗。观察比较两组手术时间、平均溃疡愈合时间、不同时间段创面愈合情况及术后疼痛评分、生活质量评分。结果:观察组溃疡愈合时间、不同时间段创面愈合情况均优于对照组(P<0.05),观察组术后疼痛评分和生活质量评分均优于对照组(P<0.05)。结论:治疗下肢静脉性溃疡时,聚桂醇注射联合自体浓缩生长因子相较单纯使用聚桂醇可显著提高疗效,并缩短疗程。

关键词：聚桂醇自体浓缩生长因子下肢静脉性溃疡