关于运动学的最新出版物和专利

本周头盔检测、模糊逻辑、多目标跟踪、YOLOv5、纤维分析、古纸、SEM-EDS、傅立叶变换红外光谱、CFD、代用模型、操纵性能、泵喷推进、微驱动、蜂群优化、旋转机构、精密工程、机器人操纵、倾斜和枢轴转动、灵巧抓取、运动学原理、车辆加速度、交叉口偏离、运动学分析、电动汽车、轨迹分解、传感信号、运动轨迹、电子设备、图像处理、深度预测、电子设备、存储介质

11 月 12, 2025

航天, 控制图, 运动学, 机械工业, 机器人技术, 模拟

提示： 在此基础上，您可以搜索和筛选我们的航空学：
* 免费出版物搜索工具按作者、主题、关键词、日期或期刊。
* 免费专利搜索工具从欧洲专利局申请英文专利。

这是我们最新精选的运动学方面的全球英文出版物和专利，涉及许多科学在线期刊，分类并侧重于运动学、相对速度、相对加速度、轨迹、轨迹、切比切夫、库茨巴赫、自由落体、角速度、角加速度、弹丸运动、平均速度和平均加速度。

Optimizing Helmet Use Detection in Construction Sites via Fuzzy Logic-Based State Tracking

Published on 2025-10-21 by Xiaoxiong Zhou, Xuejun Jia, Jian Bai, Xiang Lv, Xiaodong Lv, Guangming Zhang @MDPI

Abstract: Automated safety monitoring on construction sites requires precise helmet-status detection and robust multi-object tracking in long, occlusion-rich video sequences. This study proposes a two-stage framework: (i) a YOLOv5 model enhanced with self-adaptive coordinate attention (SACA), which incorporates coordinate-aware contextual information and reweights spatial&ndash;channel responses to emphasize head-region cues&mdash;SACA modules are integrated into the backbone to improve sm[...]

Our summary: This study presents a two-stage framework for helmet use detection on construction sites, utilizing a YOLOv5 model with self-adaptive coordinate attention and a DeepSORT tracker with fuzzy logic. The proposed system achieves high accuracy in challenging video conditions, surpassing other models in detection and tracking performance. Results indicate effective helmet monitoring with reduced identity fragmentation and missed detections in real-time applications.

Helmet Detection, Fuzzy Logic, Multi-Object Tracking, YOLOv5

Publication

Analysis of the Fiber Residues Unearthed from the Dabuzi Han Tomb in Xi’an, Shaanxi

Published on 2025-10-21 by Zhenzhen Ma, Yingpei Zhu, Jing Shao, Xianting Hou, Menghe Cui, Bei Zhang, Jianxi Li, Qixing Xia @MDPI

Abstract: In 2021, archeologists found that a bronze mirror was wrapped with a yellow-green fiber sheet in the Western Han tomb M68 in the Dabuzi Cemetery in Xi&rsquo;an, China. To ascertain the composition and function, a scanning electronic microscopy&ndash;energy dispersive spectrometer (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), and pyrolysis gas chromatography&ndash;mass spectrometry (Py-GC/MS) were combined for the morphology and components&rsquo; analy[...]

Our summary: The study investigates fiber residues from the Dabuzi Han Tomb, revealing the composition and characteristics of a yellow-green fiber sheet. Analysis techniques included SEM-EDS, FTIR, and Py-GC/MS, indicating the fiber is likely ancient hemp paper. The findings contribute to understanding ancient Chinese paper-making technology and its historical development.

A CFD-Based Surrogate for Pump–Jet AUV Maneuvering

Published on 2025-10-21 by Younhee Kwon, Dong-Hwan Kim, Jeonghwa Seo, Hyun Chung @MDPI

Abstract: Prediction of the maneuvering performance of autonomous underwater vehicles equipped with pump&ndash;jet propulsion remains computationally intensive when relying solely on high-fidelity computational fluid dynamics. To overcome this limitation, a surrogate maneuvering model is developed to achieve comparable accuracy with drastically reduced computational cost. The model is constructed from numerical results obtained using unsteady Reynolds-averaged Navier&ndash;Stokes equations[...]

Our summary: A surrogate maneuvering model for pump-jet AUVs is developed to reduce computational costs while maintaining accuracy. It utilizes unsteady Reynolds-averaged Navier-Stokes equations and a Taylor-expansion-based framework. Validation against high-fidelity results shows the model effectively predicts kinematic responses, forces, and moments.

CFD, surrogate model, maneuvering performance, pump-jet propulsion

Publication

Optimized Design of a Sub-Arc-Second Micro-Drive Rotary Mechanism Based on the Swarm Optimization Algorithm

Published on 2025-10-21 by Na Zhang, Dongmei Wang, Kai Li, Zhenyang Lv, Haochen Gui, Yizhi Yang, Manzhi Yang @MDPI

Abstract: The optimization of the micro-motion rotary mechanism aims to obtain the maximum rotation angle in a certain space and increase the compensation range of the micro-motion mechanism. Aiming to address the disadvantages of a small movement stroke, low positioning accuracy, and limited research on the sub-arc-second level of precision micro-drive mechanism, a micro-drive mechanism was designed in this study and structural optimization was performed to obtain the maximum output angle. Additionally, [...]

Our summary: This study presents the design and optimization of a micro-drive rotary mechanism using the swarm optimization algorithm. It focuses on enhancing the rotation angle and positioning accuracy of the mechanism. Experimental tests validate the performance improvements and potential for ultra-precision applications.

Micro-Drive, Swarm Optimization, Rotary Mechanism, Precision Engineering

Publication

A Dexterous Reorientation Strategy for Precision Picking of Large Thin Objects

Published on 2025-10-21 by Jungwon Seo @MDPI

Abstract: This paper presents tilt-and-pivot manipulation, a robotic technique for picking large, thin objects resting on hard supporting surfaces. The method employs in-hand dexterous manipulation by reorienting the gripper around the object&rsquo;s contact point, allowing a finger to enter the gap between the object and the surface, without requiring relative sliding at the contact. This finally facilitates reliable pinch grasps on the object&rsquo;s faces. We investigate the kinematic p[...]

Implications for Road Safety, Traffic Engineering, and Autonomous Driving

Published on 2025-10-21 by Alfonso Micucci, Luca Mantecchini, Giacomo Bettazzi, Federico Scattolin @MDPI

Abstract: Understanding vehicle acceleration behavior during intersection departures is critical for advancing traffic safety, sustainable mobility, and intelligent transport systems. This study presents a high-resolution kinematic analysis of 714 vehicle departures from signalized intersections, encompassing straight crossings, left turns, and right turns, and involving a diverse sample of internal combustion engine (ICE), hybrid electric (HEV), and battery electric vehicles (BEV). Using synchronized Mic[...]

Our summary: Implications for Road Safety, Traffic Engineering, and Autonomous Driving. High-resolution kinematic analysis of vehicle departures from intersections reveals that battery electric vehicles exhibit higher acceleration and final speeds compared to internal combustion engine and hybrid electric vehicles, with implications for traffic simulation and urban crash analysis.

vehicle acceleration, intersection departures, kinematic analysis, electric vehicles

Publication

Multi-target trajectory decomposition observation method, electronic device, and storage medium

Patent published on the 2025-09-18 in US under Ref US2025294326 by ZTE CORPâ€‚[CN] (Chen Shijunâ€‚[cn], Li Junqiangâ€‚[cn], Chen Daweiâ€‚[cn], Cheng Weiâ€‚[cn], Lin Xuâ€‚[cn])

Abstract: A multi-target trajectory decomposition observation method, which includes: acquiring a sensing signal at a current moment, and sensing location information and signal energy values of respective targets of a plurality of targets based on the sensing signal at the current moment; displaying a plurality of sensing points of the respective targets on a map according to the location information and signal energy values of the respective targets; determining one or more motion trajectories based on [...]

Our summary: The method acquires sensing signals and location information of multiple targets. It displays sensing points on a map and determines motion trajectories based on current and historical data. The method decomposes sensed information of moving targets for output.

Image processing method, electronic device, and storage medium

Patent published on the 2025-09-18 in US under Ref US2025292424 by LENOVO BEIJING LTDâ€‚[CN] (Chen Kaiyueâ€‚[cn], Lv Wanjunâ€‚[cn], Liang Xianchenâ€‚[cn])

Abstract: An image processing method, an electronic device, and a storage medium are provided in the present disclosure. The method includes obtaining a plurality of frames of first images; predicting depth information of the moving object to obtain first depth prediction information of the moving object in the plurality of frames of first images; obtaining moving trajectory information of the moving object in the plurality of frames of first images; according to the moving trajectory information of the m[...]

Our summary: The method involves obtaining frames of first images and predicting depth information of a moving object. It corrects the depth prediction based on the moving trajectory information. Finally, it converts the first images into second images for three-dimensional effect output.

image processing, depth prediction, electronic device, storage medium

Patent

Table of Contents

添加标题以开始生成目录

迎接新挑战
机械工程师、项目、工艺工程师或研发经理

可在短时间内接受新的挑战。
通过 LinkedIn 联系我
塑料金属电子集成、成本设计、GMP、人体工程学、中高容量设备和耗材、精益制造、受监管行业、CE 和 FDA、CAD、Solidworks、精益西格玛黑带、医疗 ISO 13485

我们正在寻找新的赞助商

您的公司或机构从事技术、科学或研究吗？
> 给我们发送消息 <

涵盖的主题： 运动学、相对速度、相对加速度、轨迹、角速度、角加速度、弹丸运动、平均速度、平均加速度、惯性测量单位、两相流、湍流模型、混合推进、动力学模拟、优化、自适应滑动模式控制、模块化折纸 ISO 5725、ISO 14739、ISO 14520、ISO 25119 和 ISO 14855。

历史背景

盖-吕萨克定律（压力-温度定律）

这一原理也被称为阿蒙顿斯定律，它指出，对于固定质量、恒定体积的理想气体，其压强与其绝对温度成正比。这种关系在数学上表示为 [latex]P \propto T[/latex] 或两种状态之间的比较，即 [latex]\frac{P_1}{T_1} = \frac{P_2}{T_2}[/latex]。这描述的是等焓（恒定体积）条件下的气体行为。.

现代原子理论

原子理论认为，所有物质都由称为原子的离散单元组成。元素由原子核中含有特定数量质子的原子组成。原子曾经被认为是不可分割的，但现在已知它们由亚原子粒子组成：质子、中子和电子。化学反应涉及这些原子的重新排列，这些原子在化学反应过程中保持守恒。

阿伏伽德罗定律

阿伏加德罗定律指出，在相同的温度和压力下，等体积的所有气体都含有相同数量的分子。这就在气体的体积和物质的数量（摩尔数）之间建立了直接的比例关系。数学关系表示为 [latex]V \propto n[/latex]，或更常见的 [latex]V/n = k[/latex]，其中 k 是常数。.

连续统假设

连续介质假设将流体视为连续物质，而非离散分子。当问题的长度尺度远大于分子间距离时，这种简化是有效的，从而允许在无穷小的点上定义密度和速度等属性。这使得我们能够使用微分方程来描述流体流动的宏观行为。

磁偶极矩

磁体的磁矩是一个矢量，它描述了磁体的整体磁性。它可以形象地理解为一个磁偶极，即一对相隔一定距离的假想南北极。磁矩从南极指向北极。对于一个电流回路，磁矩 [latex]\vec\{mu} = I \vec{A}[/latex]，其中 I 是电流，A 是面积矢量。.

塞贝克效应

塞贝克效应是将温度差直接转换为电压的过程。当在两个不同导体或半导体的结点上施加温度梯度时，就会产生电压。该电压与温差成正比，其比例常数称为塞贝克系数（[latex]V = S cdot Delta T[/latex]）。.

柯西应力张量

考奇应力张量，表示为 [latex]/boldsymbol{/sigma}[/latex]，是一个二阶张量，完全定义了材料内部某点的应力状态。它通过线性关系 [latex]\mathbf{T} = \boldsymbol\{sigma} \cdot \mathbf{n}[/latex]，将通过该点的任何表面上的牵引向量（单位面积上的力）[latex]\mathbf{T}[/latex] 与表面的法向量 [latex]\mathbf{n}[/latex] 联系起来。

1802

1808

1811

1820

1821

1822

1802

1810

1816

1820

1822

1824

道尔顿分压定律

道尔顿定律指出，在不发生反应的气体混合物中，施加的总压强等于各气体分压之和。气体的分压是指在相同温度下，气体单独占据整个体积时所产生的压强。计算公式为 [latex]P_{text{total}} = \sum_{i=1}^{n} p_i[/latex]。.

查理定律（体积温度定律）

查尔斯定律也称为体积-温度定律或体积定律，它指出，对于恒压下固定质量的理想气体，其所占体积与其绝对温度成正比。这表示为 [latex]V \propto T[/latex] 或 [latex]\frac{V_1}{T_1} = \frac{V_2}{T_2}[/latex]。它解释了在等压（恒压）条件下加热时气体膨胀的趋势。.

电极极化限制

伏打电池的主要缺陷在于电极极化。在运行过程中，铜阴极产生的氢气会在其表面形成一层气泡绝缘层。这层气泡会增加电池的内阻，并减少可用于反应的表面积。因此，电池的电压和电流输出在开始使用后不久就会显著下降。

完美气体中的声速

完美气体的声速（[latex]c[/latex]）是由其热力学性质决定的，而不仅仅是压力或密度。公式为 [latex]c = \sqrt{gamma R_s T}[/latex], 其中 [latex]\gamma[/latex] 是热容比（[latex]c_p/c_v[/latex]），[latex]R_s[/latex] 是气体比常数，[latex]T[/latex] 是绝对温度。因此，声音在温度较高的气体中传播得更快。.

压力和应变

工程应力 ([latex]\sigma[/latex]) 是外加载荷除以原始横截面积 ([latex]A_0[/latex])，而工程应变 ([latex]\epsilon[/latex]) 是长度变化 ([latex]\Delta L[/latex]) 除以原始长度 ([latex]L_0[/latex])。这些定义，即 [latex]\sigma = \frac{F}{A_0}[/latex] 和 [latex]\epsilon = \frac{Delta L}{L_0}[/latex] 是绘制应力-应变曲线的基础，但假设试样的尺寸在测试期间保持不变。.

电磁学和电磁铁

电磁铁是一种由电流产生磁场的磁铁。电流切断后，磁场消失。电磁铁通常由一根绕成线圈的导线组成。磁场强度与电流和线圈匝数成正比。这一原理由汉斯·克里斯蒂安·奥斯特发现。

纳维-斯托克斯方程

纳维-斯托克斯方程是一组描述粘性流体物质运动的非线性偏微分方程。它们是牛顿第二定律的陈述，平衡了动量变化与压力梯度、粘性力和外力之间的关系。对于不可压缩流体，方程为 [latex]\rho (\frac\{partial \mathbf{v}}{partial t} + \mathbf{v} \cdot \nabla \mathbf{v}) = -\nabla p + \mu \nabla^2 \mathbf{v} + \mathbf{f}[/latex]。