relocation

搬迁
  • 文章类型: Randomized Controlled Trial
    目的:比较输尿管软镜与原位碎石术治疗10-20mm下极结石(LPS)的疗效和安全性。
    方法:本研究是对2020年1月至2022年11月接受FURS手术治疗10-20mm下极肾结石患者预后的前瞻性分析。患者被随机分为重新定位组或原位组。LPS被安置在花萼中,在重新定位组的碎石术中,而原位组接受了FURS而没有搬迁。所有手术均由同一外科医生进行。患者的人口统计数据,石材特性,围手术期参数和结局,无石率(SFR),并发症,和总体成本进行回顾性评估.
    结果:本研究共纳入90例患者(每组45例),两组在年龄方面无显著差异,性别,BMI,糖尿病,高血压,石头尺寸,number,偏侧性,composition,和密度。平均手术时间,总能耗,术后停留时间,两组并发症相似。两组在术后1天随访时的SFR相似(p=0.091),而搬迁组3个月后取得了更高的SFR(97.8%对84.4%,p=0.026)。重新定位组的WisQol评分也明显高于原位组(126.98vs110.18,p<0.001)。
    结论:在FURS手术期间通过重新定位技术获得了满意的SFR,并发症发生率相对较低。
    OBJECTIVE: To compare the efficacy and safety of relocating the lower pole stones to a favorable pole during flexible ureteroscopy with in situ lithotripsy for the treatment of 10-20 mm lower pole stone (LPS).
    METHODS: This study was a prospective analysis of patient outcomes who underwent an FURS procedure for the treatment of 10-20 mm lower pole renal stones from January 2020 to November 2022. The patients were randomized into a relocation group or in situ group. The LPSs were relocated into a calyx, during lithotripsy in the relocation group was performed, whereas the in situ group underwent FURS without relocation. All the procedures were performed by the same surgeon. The patients\' demographic data, stone characteristics, perioperative parameters and outcomes, stone-free rate (SFR), complications, and overall costs were assessed retrospectively.
    RESULTS: A total of 90 patients were enrolled and analyzed in this study (45 per group) with no significant differences between the two groups in terms of age, gender, BMI, diabetes, hypertension, stone size, number, laterality, composition, and density. The mean operation time, total energy consumption, postoperative stay, and complications were similar between the groups. Both groups had similar SFR at 1 day postoperative follow-up (p = 0.091), while the relocation group achieved significantly higher SFR 3 months later (97.8% vs 84.4%, p = 0.026). The relocation group also had a significantly higher WisQol score than the in situ group (126.98 vs 110.18, p < 0.001).
    CONCLUSIONS: A satisfactory SFR with a relatively low complication rate was achieved by the relocation technique during the FURS procedure.
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  • 文章类型: Journal Article
    动态对象在动态场景下的移动机器人位姿估计中会产生大量的误差积累,并导致无法构建与周围环境一致的地图。沿着这些线,提出了一种基于密集光流的移动机器人鲁棒半直接三维同步定位与地图绘制算法。首先,利用稀疏直接法对机器人的姿态进行初步估计,并利用单应性矩阵对当前帧图像进行补偿,以减少机器人运动过程中旋转引起的图像变形。然后,通过计算相邻两帧的密集光流场,并基于动态阈值对场景中的动态区域进行分割,在动态区域内投影的局部地图点被消除。在此基础上,机器人的姿势是通过最小化重投影误差来优化的。此外,开发了高性能关键帧选择策略,和关键帧将在机器人的姿势被成功跟踪时插入。同时,提取特征点并将其与关键帧进行匹配,以进行后续优化和映射。考虑到直接法在实际应用场景中存在跟踪失败的问题,关键帧的特征点和地图点用于机器人重定位。最后,所有关键帧和地图点都用作全局束调整(BA)优化的优化变量,从而构建全局一致的3D密集八叉树图。一系列仿真和实验证明了该算法的优越性能。
    Dynamic objects bring about a large number of error accumulations in pose estimation of mobile robots in dynamic scenes, and result in the failure to build a map that is consistent with the surrounding environment. Along these lines, this paper presents a robust semi-direct 3D simultaneous localization and mapping (SLAM) algorithm for mobile robots based on dense optical flow. First, a preliminary estimation of the robot\'s pose is conducted using the sparse direct method and the homography matrix is utilized to compensate for the current frame image to reduce the image deformation caused by rotation during the robot\'s motion. Then, by calculating the dense optical flow field of two adjacent frames and segmenting the dynamic region in the scene based on the dynamic threshold, the local map points projected within the dynamic regions are eliminated. On this basis, the robot\'s pose is optimized by minimizing the reprojection error. Moreover, a high-performance keyframe selection strategy is developed, and keyframes are inserted when the robot\'s pose is successfully tracked. Meanwhile, feature points are extracted and matched to the keyframes for subsequent optimization and mapping. Considering that the direct method is subject to tracking failure in practical application scenarios, the feature points and map points of keyframes are employed in robot relocation. Finally, all keyframes and map points are used as optimization variables for global bundle adjustment (BA) optimization, so as to construct a globally consistent 3D dense octree map. A series of simulations and experiments demonstrate the superior performance of the proposed algorithm.
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  • 文章类型: Journal Article
    在没有事先进行GPS测量的情况下,工业园区中无人驾驶地面车辆(UGV)的精确定位提出了重大挑战。同时定位和地图绘制(SLAM)技术可以通过捕获环境特征来应对这一挑战,使用传感器进行实时UGV定位。为了提高UGV的实时定位精度和效率,为了提高工业园区内UGV测距的鲁棒性,从而解决与UGV运动控制不连续性和测距漂移有关的问题,本文提出了一种基于FAST-LIO2的紧密耦合LiDAR-IMU测距方法,集成了地面约束和一种新颖的特征提取方法。此外,提出了一种新的先验图维护方法。前端模块通过将定位的检测和校正与点云配准相结合来获取UGV的先前姿态。然后,提出的先验地图的维护方法用于分层和分区隔离并执行先验地图的实时维护。在后端,实时定位是通过提出的结合地面约束的紧密耦合LiDAR-IMU里程计实现的。此外,提出了一种基于双向投影平面斜率差滤波器的特征提取方法,实现边缘的高效、准确的点云特征提取,平面和地面点。最后,对所提出的方法进行了评估,使用来自工业园区的自收集数据集和KITTI数据集。我们的实验结果表明,与曲率特征提取方法的FAST-LIO2和FAST-LIO2相比,在KITTI数据集上,所提出的方法将测距精度提高了30.19%和48.24%。里程计的效率分别提高了56.72%和40.06%。当利用先前的地图时,UGV实现了厘米级的定位精度。在自收集数据集上,与FAST-LIO2相比,该方法的定位精度提高了46.367%,定位效率提高了32.33%。所提出的方法的z轴定位精度达到毫米级精度。与传统方法相比,所提出的现有地图维护方法将RAM使用量减少了64%。
    The precise localization of unmanned ground vehicles (UGVs) in industrial parks without prior GPS measurements presents a significant challenge. Simultaneous localization and mapping (SLAM) techniques can address this challenge by capturing environmental features, using sensors for real-time UGV localization. In order to increase the real-time localization accuracy and efficiency of UGVs, and to improve the robustness of UGVs\' odometry within industrial parks-thereby addressing issues related to UGVs\' motion control discontinuity and odometry drift-this paper proposes a tightly coupled LiDAR-IMU odometry method based on FAST-LIO2, integrating ground constraints and a novel feature extraction method. Additionally, a novel maintenance method of prior maps is proposed. The front-end module acquires the prior pose of the UGV by combining the detection and correction of relocation with point cloud registration. Then, the proposed maintenance method of prior maps is used to hierarchically and partitionally segregate and perform the real-time maintenance of the prior maps. At the back-end, real-time localization is achieved by the proposed tightly coupled LiDAR-IMU odometry that incorporates ground constraints. Furthermore, a feature extraction method based on the bidirectional-projection plane slope difference filter is proposed, enabling efficient and accurate point cloud feature extraction for edge, planar and ground points. Finally, the proposed method is evaluated, using self-collected datasets from industrial parks and the KITTI dataset. Our experimental results demonstrate that, compared to FAST-LIO2 and FAST-LIO2 with the curvature feature extraction method, the proposed method improved the odometry accuracy by 30.19% and 48.24% on the KITTI dataset. The efficiency of odometry was improved by 56.72% and 40.06%. When leveraging prior maps, the UGV achieved centimeter-level localization accuracy. The localization accuracy of the proposed method was improved by 46.367% compared to FAST-LIO2 on self-collected datasets, and the located efficiency was improved by 32.33%. The z-axis-located accuracy of the proposed method reached millimeter-level accuracy. The proposed prior map maintenance method reduced RAM usage by 64% compared to traditional methods.
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  • 文章类型: Journal Article
    The taxonomy and evolutionary history of Sophora L., a genus with high economic and medicinal value, remain uncertain due to the absence of genetic resource (especially in China) and low polymorphism of molecular markers. Our aim was to elucidate the molecular evolution and phylogenetic relationships in chloroplast genomes of Sophora species in the early-diverging legume subfamily Papilionoideae (Fabaceae). We reported nine Sophora chloroplast genome from China using Illumina sequencing. We performed a series of analyses with previously published genomes of Sophora species to investigate their genomic characteristics, identified simple sequence repeats, large repeat sequences, tandem repeats, and highly polymorphic loci. The genomes were 152,953-158,087 bp in length, and contained 111-113 unique genes, including 76-78 protein coding, 31 tRNA, and 4 rRNA. The expansion of inverted repeat boundary of Sophora resulted in rps12 entering into the LSC region and loss of trnT-CGU gene in some species. Also, we found an approximately 23 kb inversion between trnC-GCA and trnF-GAA within the genus. In addition, we identified seven highly polymorphic loci (pi (π) > 0.035) suitable for inferring the phylogeny of Sophora species. Among these, three regions also co-occurred with large repeat sequences and support use of repeats as a proxy for the identification of polymorphic loci. Based on whole chloroplast genome and protein-coding sequences data-set, a well-supported phylogenetic tree of Sophora and related taxa showed that this genus is monophyletic, but sect. Disamaea and sect. Sophora, are incongruent with traditional taxonomic classifications based on fruit morphology. Our finding provides significant genetic resources to support further investigation into the phylogenetic relationship and evolution of the genus Sophora.
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  • 文章类型: Journal Article
    Non-visual information is important for navigation in limited visibility conditions. We designed a haptic-based relocation task to examine blindfolded adults\' use of geometric cues. Forty-eight participants learned to locate a corner in a parallelogram frame. They were then tested in different transformed frames: (a) a reverse-parallelogram, in which locations predicted by original length information and angle information conflicted, (b) a rectangle, which retained only length information, and (c) a rhombus, which retained only angle information. Results show that access to the environment\'s geometry through haptic modality is sufficient for relocation. However, adults\' performances in the current task were different from that in visual tasks in previous findings. First, compared to previous findings in visual-based tasks, length information lost its priority. Approximately half of the participants relied on angle information in the conflict test and the other half relied on length. Second, though participants encoded both length and angle information in the learning phase, only one cue was relied on after the conflict test. Finally, though participants encoded the target location successfully, they failed to represent the global shape of the environment. We attribute adults\' different performances in haptic-based and visual-based tasks to the high cognitive demands in encoding and using haptic spatial cues, especially length information.
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  • 文章类型: Journal Article
    被子植物(特别是光合成员)的叶绿体基因组(质体)通常是高度保守的,尽管在一些谱系中已经报道了结构重排。在这项研究中,我们发现延胡索是另一个不寻常的谱系,具有广泛的大规模质体重排。在代表延胡索所有三个亚属的四个新测序的延胡索质体中,我们检测到(1)相同的五个基因(trnV-UAC-rbcL)从大型单拷贝(LSC)区域的典型后部到前部的两个独立的重新定位,延胡索的atpH基因或延胡索的trnK-UUU基因的下游;延胡索和延胡索的所有区域的trnK-UUU基因(延胡索的所有区域)(延胡索中的rps16基因从LSC区域迁移到延胡索的反向重复序列(IR)区域中的11-14kb的均匀倒位在SSdhB之下clpp,和11个ndh基因)。此外,我们还发现,四个延胡索质体在基因和基因间区域均显示出GC含量升高,并且分散重复序列数量较多。系统基因组分析产生了一个支持良好的拓扑结构,这与以前基于一些DNA标记的研究结果一致,但在一定程度上与基于形态特征的分类法相矛盾。这项研究提供了对整个三个延胡索亚属的质体进化的见解,并将对进一步研究分类学有价值。系统发育,和延胡索的进化。
    The chloroplast genome (plastome) of angiosperms (particularly photosynthetic members) is generally highly conserved, although structural rearrangements have been reported in a few lineages. In this study, we revealed Corydalis to be another unusual lineage with extensive large-scale plastome rearrangements. In the four newly sequenced Corydalis plastomes that represent all the three subgenera of Corydalis, we detected (1) two independent relocations of the same five genes (trnV-UAC-rbcL) from the typically posterior part of the large single-copy (LSC) region to the front, downstream of either the atpH gene in Corydalis saxicola or the trnK-UUU gene in both Corydalis davidii and Corydalis hsiaowutaishanensis; (2) relocation of the rps16 gene from the LSC region to the inverted repeat (IR) region in Corydalis adunca; (3) uniform inversion of an 11-14 kb segment (ndhB-trnR-ACG) in the IR region of all the four Corydalis species (the same below); (4) expansions (>10 kb) of IR into the small single-copy (SSC) region and corresponding contractions of SSC region; and (5) extensive pseudogenizations or losses of 13 genes (accD, clpP, and 11 ndh genes). In addition, we also found that the four Corydalis plastomes exhibited elevated GC content in both gene and intergenic regions and high number of dispersed repeats. Phylogenomic analyses generated a well-supported topology that was consistent with the result of previous studies based on a few DNA markers but contradicted with the morphological character-based taxonomy to some extent. This study provided insights into the evolution of plastomes throughout the three Corydalis subgenera and will be of value for further study on taxonomy, phylogeny, and evolution of Corydalis.
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  • 文章类型: Journal Article
    BACKGROUND: An ageing population has resulted in increased numbers of older adults moving to a nursing home, and the challenges triggered by relocation are highlighted. Various factors are identified to be associated with relocation and psychological adjustment to living in a nursing home. However, no systematic review has synthesised the evidence, and its associated factors remain unclear.
    OBJECTIVE: To examine and synthesise the best available evidence on the factors associated with adjustment to living in a care facility.
    METHODS: Systematic review.
    METHODS: Nine electronic databases were searched from database inception to March 2020: Pubmed, Embase, CINAHL, PsycINFO, Cochrane library, China National Knowledge Infrastructure, China Wanfang Database, Chinese Biomedical Literature Database, Chinese Periodical Full-text Database.
    METHODS: The references listed in the included studies were manually checked. The quality of the eligible studies was assessed using the 11-item checklist of the Agency for Healthcare Research and Quality.
    RESULTS: A total of 20 studies were included in this review, with 17 cross-sectional studies, and three longitudinal study. 19 studies were rated as moderate quality and the other one was high quality. 17 measures were used to assess nursing home adjustment. Six distinct categories of the associated factors for nursing home adjustment were identified: demographic characteristics (n = 11), physiological factors (n = 3), psychological factors (n = 9), social factors (n = 9), relocation factors (n = 6), and facility factors (n = 5).
    CONCLUSIONS: Decision-making control, self-efficacy, social support, activities of daily living, and length of stay should all be taken into account when assisting resident scoping with a relocation to a nursing home. Infuture research, multiple areas can be considered when improving the level of nursing home adjustment, as well as interventions and health policies.
    UNASSIGNED: PROSPERO CRD 42018115935.
    UNASSIGNED: A systematic review of the factors associated with adjustment to living in a care facility.
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  • 文章类型: Journal Article
    This study focuses on patterns and influences of return migration behavior in mainland China, (n = 468 individuals ages 50 and above) from a life-course perspective, using the 2011 China Health and Retirement Longitudinal Study (CHARLS). Utilizing spatial analysis, we found return migration geographic patterns mainly from the frontier and urban centers to central provinces, involving migrant workers returning to their rural homes. We used logistic linear modeling to examine the correlations between personal attributes (e.g., age, gender, marital status), environmental aspects (e.g., community characteristics, housing conditions, geographic attributes), and return migration. Historical and socioeconomic factors affected return migration, including availability parents to provide care, declining personal health, improved housing infrastructures, and better access to community services. Our findings also show the productive social role of caregiving as a reason for migration, calling for flexible policies in China\'s social welfare system, comprehensive senior living facilities, and adequate support systems in rural communities.
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  • 文章类型: Journal Article
    This research aims to explore the life experiences of relocated earthquake survivors with PTSD and develop a conceptual framework for understanding their life experiences.
    Interviews were conducted with twenty-three participants. The participant selection, data collection and analysis were based on grounded theory methodology. A theoretical model called \"loss of homeland\" was developed.
    Loss of homeland was the most important condition that influenced the relocated participants\' self-identity, social connections, and meaning system. These aspects were categorized into existential changes, lost connections, and changes in identity. Post-disaster relocation threatens individuals\' sense of meaning, integrity of self, and sense of belonging, affects every aspect of everyday life and shatters their inner and outer harmony.
    Further research guided by this theoretical model is needed to inform post-disaster mental health services and relocation policy. Mental health professionals and policy makers can make more informed decisions in terms of disaster relocation policy and manage post-disaster psychological disturbances by focusing on both places and people.
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  • 文章类型: Journal Article
    Beijing has been experiencing population ageing and rapid urbanization processes. Older people\'s living environment has changed dramatically. This research aims to understand the older people\'s perception of the changes in their living environment, the determinants of age-friendly living environment, and the impact path before and after their relocation in Beijing. The quantitative analysis is based on 353 valid questionnaires collected in four sample communities in Beijing. By using descriptive analysis and structure equation modeling (SEM), the results show that the living environment gets improved after relocation except accessibility to health care facilities. The cultural environment of the communities has significant impacts on the age-friendliness of the living environment. The physical environment of communities is able to improve the living environment indirectly through promoting the community cultural environment. This study sheds light on future research on age-friendly living environment for the ageing population in Beijing.
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