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国产化 2

CAP1400 1

k-最近邻分类 1

主成分分析 1

亚细胞定位 1

作用机制 1

先进非能动技术 1

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初生多肽相关复合物 1

动态强度 1

动态硬度 1

参数修正 1

同时定位与建图（SLAM）；长期；鲁棒性；激光雷达（LiDaR）；视觉惯性激光雷达导航（VILN） 1

吖啶 1

图像分析 1

图像预处理 1

基元 1

基因敲除 1

失效链路定位；冗余消除算法；覆盖集；无线传感器网络；网络诊断 1

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Yield-height correlation and QTL localization for plant height in two lowland switchgrass populations

Shiva O. MAKAJU, Yanqi WU, Michael P. ANDERSON, Vijaya G. KAKANI, Michael W. SMITH, Linglong LIU, Hongxu DONG, Dan CHANG

《农业科学与工程前沿（英文）》 2018年第5卷第1期页码 118-128 doi: 10.15302/J-FASE-2018201

摘要： Switchgrass ( L.), as a model herbaceous crop species for bioenergy production, is targeted to improve biomass yield and feedstock quality. Plant height is a major component contributing to biomass yield. Accordingly, the objectives of this research were to analyze phenotypic variation for biomass and plant height and the association between them and to localize associated plant height QTLs. Two lowland switchgrass mapping populations, one selfed and another hybrid population established in the field at Perkins and Stillwater, Oklahoma, were deployed in the experiment for two years post establishment. Large genetic variation existed for plant biomass and height within the two populations. Plant height was positively correlated with biomass yield in the selfed population ( = 0.39, <0.0001) and the hybrid population ( = 0.41, <0.0001). In the selfed population, a joint analysis across all environments revealed 10 QTLs and separate analysis for each environment, collectively revealed 39 QTLs related to plant height. In the hybrid population, the joint analysis across overall environments revealed 35 QTLs and the separate analysis for each environment revealed 38 QTLs. The findings of this research contribute new information about the genetic control for plant height and will be useful for future plant breeding and genetic improvement programs in lowland switchgrass.

关键词： yield-height QTL localization lowland switchgrass

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Robotized machining of big work pieces: Localization of supporting heads

Wojciech SZYNKIEWICZ, Teresa ZIELIŃSKA, Włodzimierz KASPRZAK

《机械工程前沿（英文）》 2010年第5卷第4期页码 357-369 doi: 10.1007/s11465-010-0103-0

摘要： A planner for a self adaptable and reconfigurable fixture system is proposed. The system is composed of mobile support agents that support thin sheet metal parts to minimize part dimensional deformation during drilling and milling operations. Compliant sheet metal parts are widely used in various manufacturing processes including automotive and aerospace industries. The main role of the planner is to generate an admissible plan of relocation of the mobile agents. It has to find the admissible locations for the supporting heads that provide continuous support in close proximity to the tool and trajectories of the mobile bases characterized by very high speeds during the relocation phases.

关键词： fixture robot milling drilling

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Optimal localization of complex surfaces in CAD-based inspection

XU Jinting, LIU Weijun, SUN Yuwen

《机械工程前沿（英文）》 2008年第3卷第4期页码 426-433 doi: 10.1007/s11465-008-0068-4

摘要： Complex surface inspection requires the optimal localization of the measured surface related to the design surface so that the two surfaces can be compared in a common coordinate frame. This paper presents a new technique for solving the localization problem. The basic approach consists of two steps: 1) rough localization of the measured points to the design surface based on curvature features, which can produce a good initial estimate for the optimal localization; 2) fine localization based on the least-square principle so that the deviation between the measured surface and the design surface is minimized. To efficiently compute the closest points on the design surface of the measured points, a novel method is proposed. Since this approach does not involve an iterative process of solving non-linear equations for the closest points, it is more convenient and robust. The typical complex surface is used to test the developed algorithm. Analysis and comparison of experimental results demonstrate the validity and applicability of the algorithm.

关键词： deviation comparison non-linear localization inspection

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Strain localization analyses of idealized sands in biaxial tests by distinct element method

Mingjing JIANG, Hehua ZHU, Xiumei LI,

《结构与土木工程前沿（英文）》 2010年第4卷第2期页码 208-222 doi: 10.1007/s11709-010-0025-2

摘要： This paper presents a numerical investigation on the strain localization of an idealized sand in biaxial compression tests using the distinct element method (DEM). In addition to the dilatancy and material frictional angle, the principal stress field, and distributions of void ratio, particle velocity, and the averaged pure rotation rate (APR) in the DEM specimen are examined to illustrate the link between microscopic and macroscopic variables in the case of strain localization. The study shows that strain localization of the granular material in the tests proceeds with localizations of void ratio, strain and APR, and distortions of stress field and force chains. In addition, both thickness and inclination of the shear band change with the increasing of axial strain, with the former valued around 10–14 times of mean grain diameter and the later overall described by the Mohr-Coulomb theory.

关键词： idealized sand strain localization numerical analyses distinct element method (DEM)

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Molecular regulation and genetic improvement of seed oil content in

Wei HUA,Jing LIU,Hanzhong WANG

《农业科学与工程前沿（英文）》 2016年第3卷第3期页码 186-194 doi: 10.15302/J-FASE-2016107

摘要： As an important oil crop and a potential bioenergy crop, L. is becoming a model plant for basic research on seed lipid biosynthesis as well as seed oil content, which has always been the key breeding objective. In this review, we present current progress in understanding of the regulation of oil content in , including genetics, biosynthesis pathway, transcriptional regulation, maternal effects and QTL analysis. Furthermore, the history of breeding for high oil content in is summarized and the progress in breeding ultra-high oil content lines is described. Finally, prospects for breeding high oil content cultivars are outlined.

关键词： breeding maternal effects oilseed rape QTL

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Lipin3 leads to hypertriglyceridemia and obesity by disrupting the expression and nucleocytoplasmic localization

《医学前沿（英文）》 doi: 10.1007/s11684-023-1003-0

摘要： Lipin proteins including Lipin 1–3 act as transcriptional co-activators and phosphatidic acid phosphohydrolase enzymes, which play crucial roles in lipid metabolism. However, little is known about the function of Lipin3 in triglyceride (TG) metabolism. Here, we identified a novel mutation (NM_001301860: p.1835A>T/p.D612V) of Lipin3 in a large family with hypertriglyceridemia (HTG) and obesity through whole-exome sequencing and Sanger sequencing. Functional studies revealed that the novel variant altered the half-life and stability of the Lipin3 protein. Hence, we generated Lipin3 heterozygous knockout (Lipin3-heKO) mice and cultured primary hepatocytes to explore the pathophysiological roles of Lipin3 in TG metabolism. We found that Lipin3-heKO mice exhibited obvious obesity, HTG, and non-alcoholic fatty liver disorder. Mechanistic study demonstrated that the haploinsufficiency of Lipin3 in primary hepatocytes may induce the overexpression and abnormal distribution of Lipin1 in cytosol and nucleoplasm. The increased expression of Lipin1 in cytosol may contribute to TG anabolism, and the decreased Lipin1 in nucleoplasm can reduce PGC1α, further leading to mitochondrial dysfunction and reduced TG catabolism. Our study suggested that Lipin3 was a novel disease-causing gene inducing obesity and HTG. We also established a relationship between Lipin3 and mitochondrial dysfunction.

关键词： Lipin3 Lipin1 hypertriglyceridemia obesity mitochondrial dysfunction

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基于纹理及小波分析的车牌定位方法

黄卫,路小波,余彦翔,凌小静

《中国工程科学》 2004年第6卷第3期页码 19-24

摘要：

提出了一种基于纹理和小波分析的车牌定位方法。针对图像背景复杂，且车牌所占比例较小的特点，提出了一种确定基元分类阈值的二值化方法；根据车牌字符分布规律，提出了二值纹理基元分析方法，提取车牌候选区域；基于小波分析提取车牌区域竖笔画特征，采用隶属度定量表征车牌竖笔画特征、位置特征及形状特征，给出综合这些特征、从候选区域提取车牌区域的方法。测试结果表明，该方法正确定位率超过96%

关键词：纹理小波分析基元车牌定位

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基于重要性采样的TOA与FOA无源定位算法 Article

Rui-rui LIU, Yun-long WANG, Jie-xin YIN, Ding WANG, Ying WU

《信息与电子工程前沿（英文）》 2017年第18卷第8期页码 1167-1179 doi: 10.1631/FITEE.1601657

摘要：最大似然类的无源定位方法可以达到较高的定位精度，但其计算量非常大。由于时频参数联合定位模型本身的非线性和非凸性非常大，繁重的计算量在TOA与FOA联合定位系统中表现尤为明显。本文针对这一问题，通过Pincus全局最优理论和蒙特卡洛重要性采样技术降低了最大似然类定位算法的计算复杂度，并且保证算法可以收敛到全局最优解。本文主要的贡献是构建了一个高斯分布的概率密度函数来近似原始的代价函数方便后续的采样，我们称之为重要性函数。该方法所带来性能上的提升是因为选择了最优的重要性函数并且Pincus保证算法收敛到全局最小值。这一处理大大降低了计算量，由于算法进行了泰勒级数展开，需要初始估计值。通过采样处理并且对样本进行加权，本文算法对初始估计值具有良好的鲁棒性。最后，实验证明本文所提算法可以达到克拉美罗限，且性能要优于现有算法。

关键词：无源定位；到达时间；到达频率；蒙特卡洛重要性采样；最大似然估计

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长走廊环境下视觉特征辅助的移动机器人定位研究 Research Article

葛耿育1,3,张毅2,王维1,胡立鹤1,王洋1,蒋勤1

《信息与电子工程前沿（英文）》 2023年第24卷第6期页码 876-889 doi: 10.1631/FITEE.2200208

摘要：定位在移动机器人导航系统中起着至关重要的作用，是自主移动的基本能力。在室内环境中，当前主流的定位方案使用2D激光雷达，利用即时定位和建图（SLAM）技术来构建占据栅格地图；然后，基于已知的地图来定位。然而，此类方案仅在具有显著几何特征的区域有效。对于重复、对称或类似结构的区域，例如长走廊，常规粒子过滤方法将失效。为解决这一问题，本文提出一种从粗到细的模式，该模式使用视觉特征辅助长走廊中的移动机器人定位。首先，移动机器人被远程控制，沿着中线从起始位置移动到终点。在移动过程中，使用基于激光的SLAM方法建图。同时，根据关键帧选择策略创建关键帧图像组成的视觉地图。关键帧通过时间戳与机器人的姿势相关联。其次，基于提取的激光扫描距离特征，提出一种移动策略，确定初始粗略位置。这对于移动机器人来说至关重要，因为它给出了机器人需要移动到哪里才能调整姿势的指令。然后，移动机器人根据移动策略以适当的视角捕捉图像，并将其与图像地图进行匹配，以获得粗略的定位。最后，提出一种改进的粒子滤波方法来实现精细定位。实验结果表明，该方法对全局定位是有效和鲁棒的。定位成功率达98.8%，平均移动距离仅0.31米。此外，当移动机器人被绑架到走廊中的另一个位置时，该方法依然有效。

关键词：移动机器人；定位；即时定位和建图（SLAM）；走廊环境；粒子滤波；视觉特征

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基于到达时间差和到达频率差的多层等梯度声速剖面建模与声学定位 Research Article

詹东洲1,王思甜1,蔡守桂1,郑华荣2,徐文2

《信息与电子工程前沿（英文）》 2023年第24卷第1期页码 164-175 doi: 10.1631/FITEE.2100398

摘要：在水下媒介中，声速随着水深、温度和盐度而变化。水体的不均匀性导致声线弯折，使得现有基于声信号直线传播假设的定位算法不够精确。为实现水下声学传感网络中的高精度节点定位，本文首先使用线性分割近似方法，提出多层等梯度声速剖面（sound speed profile，SSP）模型。基于此模型，可将声线跟踪问题转化为多项式寻根问题。利用传感器节点处信号多普勒频移的导数，提出一种新的使用到达时间差（time difference of arrival，TDOA）和到达频率差（frequency difference of arrival，FDOA）的水下节点定位算法。通过模拟仿真，可以证明所提算法的有效性。与传统基于直线传播假设的方法相比，所提算法可有效处理声线弯折现象。此外，研究了不同SSP建模误差下的估计精度。总体而言，新提出的方法可以实现准确可靠的节点定位。

关键词：水下声学传感器网络；声学定位；声速剖面；到达时间差（TDOA）；到达频率差（FDOA）

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优化光学亚像素定位精度极限——揭示小PSF的像素相位效应 Article

战海洋, 邢飞, 宝竞宇, 孙婷, 陈真真, 尤政, 袁利

《工程（英文）》 2023年第27卷第8期页码 140-149 doi: 10.1016/j.eng.2023.03.009

摘要：

Subpixel localization techniques for estimating the positions of point-like images captured by pixelated image sensors have been widely used in diverse optical measurement fields. With unavoidable imaging noise, there is a precision limit when estimating the target positions on image sensors, which depends on the detected photon count, noise, point spread function (PSF) radius, and PSF’s intra-pixel position. Previous studies have clearly reported the effects of the first three parameters on the precision limit but have neglected the intra-pixel position information. Here, we develop a localization precision limit analysis framework for revealing the effect of the intra-pixel position of small PSFs. To accurately estimate the precision limit in practical applications, we provide effective PSF (ePSF) modeling approaches and apply the Cramér-Rao lower bound. Based on the characteristics of small PSFs, we first derive simplified equations for finding the best precision limit and the best intra-pixel region for an arbitrary small PSF; we then verify these equations on real PSFs. Next, we use the typical Gaussian PSF to perform a further analysis and find that the final optimum of the precision limit is achieved at the pixel boundaries when the Gaussian radius is as small as possible, indicating that the optimum is ultimately limited by light diffraction. Finally, we apply the maximum likelihood method. Its combination with ePSF modeling allows us to successfully reach the precision limit in experiments, making the above theoretical analysis effective. This work provides a new perspective on combining image sensor position control with PSF engineering to make full use of information theory, thereby paving the way for thoroughly understanding and achieving the final optimum of the precision limit in optical localization.

关键词： Optical measurement Subpixel localization Precision limit optimization Small point spread functions Centroiding Star sensors

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Ahigh precision visual localization sensor and its workingmethodology for an indoor mobile robot

Feng-yu ZHOU,Xian-feng YUAN,Yang YANG,Zhi-fei JIANG,Chen-lei ZHOU

《信息与电子工程前沿（英文）》 2016年第17卷第4期页码 365-374 doi: 10.1631/FITEE.1500272

摘要： To overcome the shortcomings of existing robot localization sensors, such as low accuracy and poor robustness, a high precision visual localization system based on infrared-reflective artificial markers is designed and illustrated in detail in this paper. First, the hardware system of the localization sensor is developed. Secondly, we design a novel kind of infrared-reflective artificial marker whose characteristics can be extracted by the acquisition and processing of the infrared image. In addition, a confidence calculation method for marker identification is proposed to obtain the probabilistic localization results. Finally, the autonomous localization of the robot is achieved by calculating the relative pose relation between the robot and the artificial marker based on the perspective-3-point (P3P) visual localization algorithm. Numerous experiments and practical applications show that the designed localization sensor system is immune to the interferences of the illumination and observation angle changes. The precision of the sensor is ±1.94 cm for position localization and ±1.64? for angle localization. Therefore, it satisfies perfectly the requirements of localization precision for an indoor mobile robot.

关键词： Mobile robot Localization sensor Visual localization Infrared-reflective marker Embedded system

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吖啶– 核定位序列偶联构建的高活性抗菌肽 Artical

Wei Zhang,Xiaoli Yang,Jingjing Song,Xin Zheng,Jianbo Chen,Panpan Ma,Bangzhi Zhang,Rui Wang

《工程（英文）》 2015年第1卷第4期页码 500-505 doi: 10.15302/J-ENG-2015106

摘要：

多重耐药菌的出现迫切需要发现具有新作用机制的抗生素。在本研究中，笔者将疏水的吖啶分子连接到核定位序列 (NLS) 的N末端合成了一种新型的抗菌药物Acr₃-NLS。为了进一步提高该试剂的抗菌活性，笔者将两个单体Acr₃-NLS分子通过二硫键连接合成了二聚体(Acr₃-NLS)₂。结果显示，与NLS相比，Acr₃-NLS，特别是(Acr₃-NLS)₂，对革兰阴性菌和革兰阳性菌表现出显著的抗菌活性。随后，其作用机制的研究表明，Acr₃-NLS 和(Acr₃-NLS)₂ 可通过细胞膜破坏方式和DNA 结合方式杀死细菌。作用于细胞膜和细胞内DNA的双靶点抑杀机制可以降低细菌对Acr₃-NLS 和(Acr₃-NLS)₂ 产生耐药性的风险。总之，本研究提供了一种新的策略，可用于设计具有双重作用机制的高效抗菌药物。

关键词：吖啶核定位序列共轭连接抗菌活性作用机制

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水下移动传感器网络的高能效节点定位和目标跟踪 None

Hua-yan CHEN, Mei-qin LIU, Sen-lin ZHANG

《信息与电子工程前沿（英文）》 2018年第19卷第8期页码 999-1012 doi: 10.1631/FITEE.1700598

摘要：水下移动传感器网络（UMSNs）不要固定，易实现快速部署，其节点可随洋流飘动扩散，易实现大范围的监测。因此，UMSNs是远海环境下实现短期、迅速、大范围组网监测跟踪的有效手段。UMSNs目标跟踪的挑战在于高精度的目标跟踪效果需要以高精度的实时节点定位为前提，而UMSNs的节点位置是不断变化的。为获得高精度的实时节点定位结果，运用传统的定位方案对其进行连续定位将会消耗大量能量。为减少UMSNs目标跟踪过程中节点定位所消耗能量，利用节点移动在时间空间的相关性，结合多步Levinson-Durbin线性预测算法提出高精度的长周期节点位置预测算法（HLMP）。通过高精度位置预测减少节点对实时通信定位的依赖，进而减少网络能耗。根据目标跟踪过程中节点与目标的相关性，提出同时定位跟踪算法（SLAT），进一步提高节点的定位精度。仿真结果表明，HLMP算法能够在低能耗的情况下显着提高定位精度，SLAT算法进一步降低节点定位误差。更高的定位精度将同步提高目标跟踪性能。

关键词：水下移动传感器网络；高能效；节点定位；目标跟踪

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无人车自主定位和障碍物感知的视觉主导多传感器融合方法 Article

Jian-ru XUE,Di WANG,Shao-yi DU,Di-xiao CUI,Yong HUANG,Nan-ning ZHENG

《信息与电子工程前沿（英文）》 2017年第18卷第1期页码 122-138 doi: 10.1631/FITEE.1601873

摘要：人类驾驶与自主驾驶在对交通环境的理解方式上有着明显差别。首先，人主要通过视觉来理解交通场景，而机器感知需要融合多种异构的传感信息才能保证行车安全。其次，一个熟练的驾驶员可以轻松适应各种动态交通环境，但现有的机器感知系统却会经常输出有噪声的感知结果，而自主驾驶要求感知结果近乎100%准确。本文提出了一种用于无人车交通环境感知的视觉主导的多传感器融合计算框架，通过几何和语义约束融合来自相机、激光雷达（LIDAR）及地理信息系统（GIS）的信息，为无人车提供高精度的自主定位和准确鲁棒的障碍物感知，并进一步讨论了已成功集成到上述框架内的鲁棒的视觉算法，主要包括从训练数据收集、传感器数据处理、低级特征提取到障碍物识别和环境地图创建等多个层次的视觉算法。所提出的框架里已用于自主研发的无人车，并在各种真实城区环境中进行了长达八年的实地测试，实验结果验证了视觉主导的多传感融合感知框架的鲁棒性和高效性。

关键词：视觉感知；自主定位；地图构建；运动规划；无人车

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标题作者时间类型操作

Yield-height correlation and QTL localization for plant height in two lowland switchgrass populations

Shiva O. MAKAJU, Yanqi WU, Michael P. ANDERSON, Vijaya G. KAKANI, Michael W. SMITH, Linglong LIU, Hongxu DONG, Dan CHANG

期刊论文

Robotized machining of big work pieces: Localization of supporting heads

Wojciech SZYNKIEWICZ, Teresa ZIELIŃSKA, Włodzimierz KASPRZAK

期刊论文

Optimal localization of complex surfaces in CAD-based inspection

XU Jinting, LIU Weijun, SUN Yuwen

期刊论文