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16461
通长预拉杆自复位PEC柱组合框架中间层抗震性能试验研究
Published 2022-12-01“…结果显示:合理设计T形件上长圆孔尺寸可实现“中震作用下利用辅助耗能元件提供耗能,而大震作用下连接转换为承压型传力模式而进一步发挥主体构件力学性能”的性能化部分自复位连接设计理念;PEC柱截面形式决定PEC柱本身抗侧刚度,从而影响自复位连接力学发展进程,而耗能元件类型仅改变耗能方式与发展进程;自复位连接的消压弯矩和开始耗能弯矩比值(<italic>M</italic><sub>a</sub>/<italic>M</italic><sub>b</sub>)是影响试件卸载后复位能力的关键因素;节点部位加强板设置增强了节点区混凝土约束,且连接构造促使节点区混凝土斜压带传力模式的形成,节点区刚度增大,抗剪能力提高;所有试件加载侧移达到2%(框架结构设计地震对应层间侧移限值)时,层间卸载后残余侧移不大于0.17%,甚至加载侧移达到3.5%(框架结构大震对应层间侧移限值)时,层间卸载后残余侧移不超过0.27%,即所有试件中间层均具有良好的复位能力。…”
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16462
肺癌患者合并肺部真菌感染的风险预测模型
Published 2023-11-01“…根据这些变量建立了一个预测模型,该模型对训练集的AUC95%CI<italic>=</italic>0.980(0.973,0.896)和内部验证的AUC95%CI<italic>=</italic>0.956 (0.795,1.000),显示具有很高的区分度。…”
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16463
圈养獐的行为训练和体温测量
Published 2023-05-01“…圈养獐(<italic>Hydropotes inermis</italic>)在日常饲养管理和疾病预防过程中易产生应激反应,造成额外的身体损伤,且獐的正常体温范围缺乏相关报道。…”
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16464
An access control scheme for IoT based on smart contracts and CP-ABE
Published 2024-10-01“…Through smart contracts, token retrieval addresses were publicly exposed to achieve 1-to-<italic>N</italic> authorization. Furthermore, contracts were designed to be deployed on the blockchain for decentralized permission evaluation of token requests, maintaining the allowed operations for subjects on specific resource objects, realizing more fine-grained attribute-based access control. …”
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16465
An Improved Multiobjective Model-Predictive Control Method for Active Neutral-Point-Clamped Five-Level Converter
Published 2024-01-01“…Second, to ensure current tracking performance and reduce computational burden, based on the <italic>gh</italic> oblique coordinate, three voltage vectors were calculated online in each control period, which can avoid lookup tables. …”
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16466
Fatigue Life Analysis of the Plastic Helical Gear and Steel Worm Transmission Mechanism
Published 2023-01-01“…The relationship between POM gear fatigue life and contact stress amplitude in German plastic gear standard VDI 2736 is used to obtain the <italic>S-N </italic>curve of the plastic helical gear, and then the fatigue life of the plastic helical gear is studied based on the stress time history life calculation criterion. …”
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16467
Navigation Systems May Deteriorate Stability in Traffic Networks
Published 2024-01-01“…In this paper, we propose a dynamic model where drivers imitate the path preferences of previous drivers, and we study the properties of its equilibrium points. Our model is a dynamic generalization of the classical <italic>traffic assignment framework</italic>, and extends it by accounting for dynamics both in the path decision process and in the network's traffic flows. …”
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16468
Explainable Model Prediction of Memristor
Published 2024-01-01“…This article proposes predicting the memristor device under test by automatically evaluating the <italic>I–V</italic> behavior using random forest and extreme gradient boosting algorithms. …”
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16469
Analysis of Pose and Workspace Characteristic of 5-DOF Parallel Robot
Published 2021-09-01“…Aiming at the problems of low rigidity, large accumulated error, and limited high-speed and heavy load in the application of serial robots in the constant force grinding processing industry, a five-degree-of-freedom parallel robot composed of 4-UPS/PPS composed of four sets of the same UPS drive branch chain and one PPS restraint branch chain is proposed, the robot movement in two-dimensional plane and rotation in three-dimensional space are realized. The <italic>X</italic>-direction constraint degrees of freedom of robot is analyzed through the DH parameter method, the mapping relationship between the moving platform pose and the driving branch is determined according to the robot kinematics inverse solution equation. …”
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16470
High-Throughput Variable-to-Fixed Entropy Codec Using Selective, Stochastic Code Forests
Published 2020-01-01“…., within 1% of Yamamoto <italic>et al.</italic>’s algorithm. The proposed code forest structure enables the implementation of highly efficient codecs, with decompression speeds 3.8 times faster than other state-of-the-art HT entropy codecs with equal or better compression ratios for natural data sources. …”
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16471
一例川金丝猴中暑并发肾损伤的诊治与分析
Published 2023-11-01“…川金丝猴(<italic>Rhinopithecus roxellana</italic>)“豆豆”,雄性,于2022年8月14日上午被发现头部无规律抽动,食欲下降,体温40 ℃,粪便糊状。…”
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16472
中国中缅树鼩生理生态学研究30年
Published 2023-02-01“…自20世纪90年代,开始了中国中缅树鼩(<italic>Tupaia belangeri</italic>)的生理生态学研究。回顾30年来中国中缅树鼩生理生态学的研究与发展:起源和分类、能量代谢和产热特征、脂肪组织、形态学、组学、化学通讯和行为学等。…”
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16473
RESEARCH ON UNBALANCING FORCE APPROACH OF THE GEOTECHNICAL CENTRIFUGE BASED ON PRETENSION MEASUREMENT OF BOLTS
Published 2025-01-01“…By fitting the change of the axial force at the measuring point, the relation between the axial force at the measuring point and the unbalance mass and the running gravitational acceleration <italic>g</italic> value of the centrifuge was established.Finally, the relation between the change of the axial preload of anchor bolts, acceleration of the centrifuge and counterweight mass were obtained by measuring the preload change of one anchor bolt and fitting the response surface. …”
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16474
Microwave Pioneers: Mau-Chung Frank Chang, “The Power of Connections”
Published 2025-01-01“…This issue's <italic>Microwave Pioneer</italic> article is about Mau-Chung Frank Chang, who perhaps more than anyone else, is responsible for the widespread commercial use of the heterojunction bipolar transistor (HBT). …”
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16475
应用CBCT对北京市600颗下颌第一磨牙近中中央根管的发生率及其相关因素的研究
Published 2022-09-01“…结果600颗纳入的MFM中存在MMC的有80颗,且二元回归分析中年龄和有无根管峡区作为相关因素差异有统计学意义(<italic>P</italic><0.05)。结论MMC在MFM中的发生率约为13.3%,并非传统意义上的“罕见”,其发生与患者的年龄和患牙根内的RCI结构相关,与性别和牙位无关。…”
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16476
DESIGN AND FINITE ELEMENT ANALYSIS OF MULTI-MODULE ZI WORM HELICAL GEAR TRANSMISSION AND ITS STRESS PREDICTION
Published 2024-04-01“…The sum of squared errors (SSE) minimum model is compared with grey predictionto verify the accuracy of prediction. The maximum stress <italic>σ</italic><sub>1max</sub> of helical gear meshing teeth under different torques is predicted, which provides a basis for corresponding engineering analysis and necessary checking design.…”
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16477
Modeling Reader's Emotional State Response on Document's Typographic Elements
Published 2011-01-01“…Based on the dimensional theory of emotions we investigate how typographic elements, like font style (bold, italics, bold-italics) and font (type, size, color and background color), affect the reader's emotional states, namely, Pleasure, Arousal, and Dominance (PAD). …”
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16478
Hydrological Method Analysis and Determination of Ecological Flow of Water Conservancy Projects: An Example of Zhangshui Youluokou Reservoir
Published 2024-01-01“…If the needs for simplified management of small watersheds are considered, it is recommended to adopt the existing result of 1.52 m<sup>3</sup>/s from the <italic>Zhangjiang River Basin Comprehensive Planning Revision Report</italic>. …”
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16479
生命共同体视角下人与亚洲象和谐共生路径研究
Published 2024-02-01“…近年来,人象关系问题引发全社会高度关注,人与亚洲象(<italic>Elephas maximus</italic>)的和谐共生也关系到生态保护目标的实现。…”
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16480
风味剂对未成年圈养大熊猫摄食竹叶的影响
Published 2024-05-01“…为了探究未成年圈养大熊猫(<italic>Ailuropoda melanoleuca</italic>)选择性摄食的风味机制,根据未成年圈养大熊猫摄食行为特点、熟悉的食物香气和喜欢的食物味道,自主研制出一种未成年圈养大熊猫的专用风味剂。…”
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