Granite is the main parent rock of the ion-adsorption type rare earth ore deposits in southern China. Taking the two granite bodies of Liuchen and Daring in the southeast of Guangxi as examples, the difference of rare earth element weathering ore-forming effect with different characteristics of granite its influencing factors were discussed through typical section geochemistry and mineralogical comparative analysis of parent rock-rich ore weathering shell. The content of rare earth elements in the potassium-felpar granite of Liuchen body is higher than that in the biotite granite of Daring body, and more significant secondary enrichment effect of rare earth elements in the weathering has also been produced. There is no obvious difference in the external environmental conditions such as climate, topography and vegetation in which the two weathering shell sections are located, the chemicaling degree of parent rock suffered is similar, and the two sections show obvious element migration characteristics during the weathering process, which is inferred that the material supply of rare earth elements the parent rock is the main factor leading to the difference of weathering ore-forming effect. The main (containing) rare earth accessory mineral combination in the weathering shell of Lihen body is “brown lepidolite   fluorite   apatite”, and that of Daring body is “brown lepidolite   tremolite   aite”. The contribution of brown lepidolite to rare earth elements in the potassium-feldspar granite of Liuchen body is much higher than that in the biite granite of Daring body, accounting for 39.30% and 9.00%, respectively, that is, the higher the total amount of rare elements in brown lepidolite in the parent rock, the higher the rare earth content in the corresponding weathering shell. The rare earth accessory minerals with weak anti-weathering in the parent rock are the main sources of ionic phase rare earth elements in the weathering shells of Liuchen body and Daring body, and the content of brown leolite is the key factor affecting the weathering ore-forming potential of granite-type parent rock.

为了更好地研究机器人的路径规划问题, 对路径规划算法进行了归纳与总结。首先对路径规划的含义作简要概述———在规定区域内规划出一条无碰撞的从起始点到目标点的最优路径; 然后根据路径规划算法的特点从传统算法路径规划和智能仿生算法路径规划两方面进行阐述, 并介绍有关算法的原理、 特点及发展现状, 以及对算法存在收敛速度慢和容易陷入局部最优解等普遍问题的优化和改进; 最后在现有研究的基础上, 从3 个方面展望机器人路径规划算法在将来的改进方向和发展趋势。

In the textile industry, fabric defect detection is an essential aspect of ensuring the quality of fabric products. To address the difficulty in recognizing fabric defects due to large scale variations and small area ratios, fabric defect detection algorithm based on improved YOLOv8 is proposed. The SimAM non-parametric attention mechanism is introduced to optimize the C2f module of YOLOv8m, to enhance the feature extraction capability for fabric defects. Referring to the Rep-BiFPN structure, the BiC module is introduced to reconstruct the connection(concat) module of Backbone network and Neck network, while also drawing on the idea of Bi-FPN pyramid cross-layer connections to improve FPN-PAN of the original Neck network, to enhance the feature fusion ability of the Neck network. WIoUv3 is used to replace the CIoU of YOLOv8m for calculating the model??s bounding box loss, reducing the penalty intensity for defects with larger aspect ratios, allowing the model to focus on anchor boxes of normal quality, and improving the overall performance of the detector, thus enhancing the detection accuracy of the model. Experimental results show that the improved YOLOv8m can achieve a mean average precision(mAP) of 94. 1%. Compared to the mAP of original YOLOv8m, it has increased by 8. 6 percentage points. Moreover, the detection accuracy of the algorithm for various types of fabric defects remains above 90%, meeting the actual needs of the industry for fabric defect detection.

国际参考电离层模型（ＩＲＩ）是根据大量的地面观测资料和多年累积的电离层研究成果建立起来的，是目前国际应用最广的经验电离层模型，以统计预报的模式反映了平静电离层的平均状态，能够较好地给出全球电离层的相关参数。本文论述了ＩＲＩ的组织机构，并对ＩＲＩ的发展历程和各个版本的新功能进行了总结，对ＩＲＩ预报的主要电离层参数进行了研究，用实例指出ＩＲＩ存在的主要问题和未来的主要发展方向，为扩大ＩＲＩ应用范围和提高ＩＲＩ预报参数的精度提供了基础。

结合恒温晶振时钟无随机误差和 ＧＰＳ秒信号无累计误差的特点，采用 ＧＰＳ测量监控技术，对高精度晶体振荡器的输出频率进行精密测量和校正后作为系统时钟，通过相位同步算法使 ＦＰＧＡ的输出 ＰＰＳ信号与 ＧＰＳ的 ＰＰＳ信号同步。系统中使用 ＮｉｏｓＩＩ＋ＶｅｒｉｌｏｇＨＤＬ设计了高分辨率的时间测量和快速校准时钟同步单元，缩短了频率校准和同步时间。实验结果表明：系统同步精度较高、结构简单，并成功地应用于电磁勘探数据采集系统中。

针对缺乏NPP-VIIRS 年度夜间灯光数据的情况, 提出采用部分NPP-VIIRS 月度数据合成年度夜间灯光数据的方法。利用部分月度数据合成年度均值影像并消除负值; 利用两期标准年度数据合成的二值图像联合各年二值图像逐年消除影像中的不稳定光源和背景噪声; 提取中国区域的DN 值进行统计分析得出最大值, 替换年度均值影像中的极高值; 以2018 年稳定夜间灯光数据为基准数据进行逐年校正, 得到2012——2018 年的合成年度夜间灯光数据。对比验证表明, 合成年度夜间灯光数据的DN 值符合实际情况,线性回归决定系数在省级和市级尺度上与标准年度数据相当, 明显高于“火石”年度数据和12 月份的月度数据, 说明年度夜间灯光数据合成方法具有一定的可靠性与科学性。

在我国一水硬铝石型铝土矿床中己查明矿物94种。其中祖泥铁矿等12种矿物在国外铝土矿中尚无报导。一水硬铝石是我国铝土矿的主要铝工业矿物， 其结晶程度、粒度大小、比磁化系数和红外光谱的O-H键波数因矿床成因类型不同而异。研究表明，一水硬铝石的形成途径主要有三种：由高岭石直接脱硅而成；三水铝石经区域变质作用脱水而成；后生、表生条件由铝真溶液结晶而成。

The extraction and beneficiation of rare earth elements(REEs) have led to severe REEs contamination in surrounding soils, water, and other environmental media. Identifying the migration, transformation, speciation, and tolerance mechanisms of REEs in soils and hyperaccumulators can provide theoretical basis for REE contamination remediation, research and development of biomimetic materials, plant mining, and other fields. This review summarizes the germplasm resources, REE accumulation characteristics, and physiological mechanisms of REE hyperaccumulators. At present, 25 REE hyperaccumulators or potential hyperaculmulator species have been identified worldwide, with ferns accounting for approximately 68% of these. REEs are primarily accumulated in leaves, where ferns predominantly enriching light rare earth elements ( LREEs), while species from the genus Phytolacca exhibit slight enrichment in heavy rare earth elements(HREEs). The mechanisms underlying the fractionation of LREEs and HREEs in hyperaccumulators involve adsorption and precipitation in extracellular cell walls, transmembrane transport within the symplast, and chelation with various ligands. The physiological mechanisms of REE hyperaccumulators can be divided into four key processes:(1) Activation of REEs in the rhizosphere through root exudates, phosphorus deficiency, and microbial interactions; (2) Efficient root uptake of REEs via both apoplastic and symplastic pathways, potentially involving REE transporters and other ion channels; (3) Xylem transport, where REEs form chelates with organic acids, amino acids, and other ligands, which influences the translocation of LREEs and HREEs to aerial parts; (4) Detoxification and storage in the aboveground parts, where REEs are bound to proteins, polysaccharides, and organic acids, and are primarily sequestered in inert compartments such as cell walls and vacuoles.

针对AutoCAD 软件不能直接使用OSGB 模型数据的问题，分析了OSGB 与DWG 模型的组织方式，利用OSG 和ObjectAＲX 二次开发包，完成了OSGB 数据的解析，进一步根据DWG 模型在AutoCAD 中的组织方式，将解析得到的数据重组为DWG 三维模型，最终实现了OSGB 模型到DWG 三维模型的自动转换。实例表明，利用本文方法能够正确提取出OSGB 模型的几何和纹理数据，并重组为具有真实感的DWG 三维模型，转换后的模型具有良好的显示效果。

对ＯｐｅｎＳｅｅｓ软件提供的６种单轴混凝土本构模型的计算原理和参数取值进行了详细的归纳，并采用塑性铰单元和ＲｅｉｎｆｏｒｃｉｎｇＳｔｅｅｌ材料模型分别与各混凝土本构模型结合建立有限元模型，对钢筋混凝土柱拟静力试验进行模拟分析。试验结果与模拟结果对比研究表明：Ｃｏｎｃｒｅｔｅ０２、Ｃｏｎｃｒｅｔｅ０３与Ｃｏｎｃｒｅｔｅ０７模型模拟结果基本一致，３种模型均可以较好地模拟钢筋混凝土柱的捏缩效应和滞回特性，能够反映钢筋混凝土柱在往复荷载作用下的受力行为，适用于钢筋混凝土结构动力非线性分析。

结合转速、电流双闭环直流调速系统的系统结构和电路组成，使用仿真软件Ｓｉｍｕｌｉｎｋ对双闭环直流调速系统电流环进行建模仿真。结果表明：阻尼系数越大，超调量越大，上升时间越短，当阻尼系数为０.５时，电流环性能达到最优。在电流环性能最优时：空载运行条件下，系统稳定转速随给定电压变小而变小；额定负载条件下，通过较长上升时间，达到额定转速。抗扰性检验表明，该系统抗扰性较强。

博格达造山带黑沟环状花岗杂岩，中心为二长花岗岩，内环为花岗闪长岩，外环为辉长岩、（辉石）闪长岩、石英闪长岩、英云闪长岩。对闪长岩、花岗闪长岩和二长花岗岩进行ＳＨＲＩＭＰ锆石Ｕ－Ｐｂ定年，分别获得了309.0±6.2Ｍａ、311.1±3.8Ｍａ和308.9±4.4Ｍａ的结晶年龄，均为晚石炭世。该岩体可能为博格达裂谷闭合，进入板内伸展环境的产物。

This study measures the comprehensive evaluation index of digital trade development and industrial transformation and upgrading by constructing an evaluation index system for the development of digital trade and industrial transformation. It is based on provincial panel data from 31 provinces(autonomous regions and municipalities) in China( excluding Hong Kong, Macao, and Taiwan) from 2010 to 2020. It employs the entropy weight TOPSIS and grey correlation dynamic evaluation methods of grey relational degree, as well as exploratory factor analysis method. The coupling coordination degree model is used to measure the coupling coordination status of the two in the national and the eight economic zones. Combined with Dagum Gini coefficient and kernel density estimation methods, the evolutionary characteristics are analyzed from the perspectives of time and space. (1)The coupling coordination between digital trade development and industrial upgrading in China is increasing year by year, from a mildly dysfunctional stage to a well-coordinated stage, but with obvious regional heterogeneity. (2)Dagum Gini coefficient analysis finds that regional differences in digital trade development and industrial upgrading show a narrowing trend, and inter-regional differences are the main source of regional differences, and they mainly come from between the three coastal regions and the great northwest regions. (3)Kernel density estimation analysis finds that although the overall regional differences are narrowing, the gap between high level of coastal areas and low level of inland areas is widening, and there is an obvious polarization phenomenon, and there are provinces with much higher coupling coordination than others.

In order to figure out the characteristics of heavy metal pollution in soil near a lead-zinc mining area in northern Taihang Mountains, 66 surface soil samples were collected. The pollution degree of seven heavy metals (Cd, Hg, As, Pb, Cr, Cu, Zn) in the research area was evaluated by Nemerow pollution index method and geoaccumulation index method. Combined with multivariate statistical analysis and positive matrix factor model, the source of soil heavy metals was analyzed. Seven forms of heavy metals were extracted and the potential ecological risk comprehensive index and risk assessment coding method were used to comprehensively evaluate the migration ability and ecological risk. The results show that the order of heavy metals pollution in soil of the study area is as follows: Cd>Pb>Zn>Hg>Cu. As and Cr are hardly polluted and are basically not affected by external factors. The trend of multivariate statistical analysis is similar to that of PMF model source analysis, and they are mutually verified. PMF is established to be more accurate in dividing human sources. Cd, Pb, Zn, Cu and a small part of Hg are from industrial and mining activities such as ore mining, beneficiation and metallurgy (65. 91%). Hg is mainly the source of atmospheric deposition caused by waste gas, dust and dust produced by ore mining and metal smelting (19. 02%). As and Cr are mainly controlled by parent material sources of soil (15. 07%). The study area is at a strong ecological hazard level as a whole. Cd and Hg are the main controlling factors. The migration ability and ecological risk of Cd are the highest. Acidic wastewater and leachate will significantly enhance the migration ability and ecological risk of Cd, and the supervision and treatment work need to be strengthened as a key focus.

成矿作用的最基本单元是元素，丰度对于元素的富集成矿具有数量上的深刻约束。元素丰度通过质量作用效应决定了元素的地球化学性质或行为，使其成矿学意义不仅仅局限于宏观领域或战略层面；性质因素则反作用于丰度的亏损或增益，其中蕴含着质量约束的不确定性；地球化学继承性则意味着质量作用效应的传递。元素丰度对矿床形成的影响或主要取决于成矿对物质来源的依赖，依赖形式是从丰度全量到有效分量、从静态物源到动态物源。大型矿床的成因很可能与地壳丰度时 －空分配的不均一性有关，成矿过程本身实质上并无显著性差异，丰度及丰度关系继承了岩石成因。

巴马花岗斑岩型稀有金属矿床是广西新发现的稀有金属矿床。该矿床位于巴马－民安北西－南东向复式短轴背斜的核部，矿体主要由５７条花岗斑岩脉组成，花岗斑岩脉中锂（Ｌｉ_２Ｏ０.３１％）、铍（ＢｅＯ０.２３％）、铌（Ｎｂ_２Ｏ_５０.００６％）、钽（Ｔａ_２Ｏ_５０．００３％）等稀有金属元素达到工业矿床要求。此外，还含有一定量的铷和铯等其他稀有金属元素。根据矿床地质特征分析，认为铌钽金属成矿可能与气成热液有关。