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.

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.

In order to better study the robot path planning problem , the path planning algorithm is summarized. Firstly , this paper gives a brief overview of the meaning of path planning—planning a collision free optimal path from the starting point to the target point in the specified area; secondly , according to the characteristics of path planning algorithm ,  it  describes  the  traditional  algorithm  path  planning and intelligent  bionic algorithm path planning , and introduces the principle , characteristics and development status of the algorithm including the op- timization and improvement of the common problems such as slow convergence speed and easy to fall into local optimal solution ; finally , on the basis of the existing research , the improvement direction and development trend of robot path planning algorithm in the future are prospected from three aspects.

GPS_clock , free of cumulative error and the high precision crystal oscillator , free of random error , thus can
oscillator is measured and adjusted , by synchronizing FPGA_PPS with GPS_PPS by phase synchronization algorithm.
A high_resolution fast_measuring unit and clock synchronized unit are designed by Nios II + Verilog  HDL to  reduce
the time of calibration and synchronization.  After experimental verification , the high precise telegraphic synchronized
system can be successfully applied in data acquisition system of electromagnetic survey.

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。

Combined with the rotate  speed and current double closed_loop DC speed regulating system ,  the  sys_ tem structure  and  the  circuit  composition  process the modeling and simulation ,   using  the  simulation software Simulink of double closed_loop DC  speed  regulating system current loop .   The  results  show  that the  greater the damping coefficient ,  the larger the overshoot amount and the shorter the rise time . When the damping coefficient is 0 . 5 ,  the  current  loop performance  is best. In the optimal performance of current loop and at no_load running conditions ,  the  system  steady  speed  changes  smaller  over  a  given  smaller  voltage .  At  the  rated  loading  condi_ tions ,  through  a long rise  time ,  the  system will  be at the rated speed .   Disturbance rejection test shows that the system has a stronger resistance to interference .

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。

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.

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。

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。

通过收集和分析近年来我国有关猪肉、猪肝和猪肾中铅、镉和汞的研究资料，总结了我国各地猪肉、猪肝和猪肾中重金属含量与超标情况，并用目标危害系数（ＴＨＱ） 评估了食用猪肉和内脏而摄入重金属的健康风险。资料表明：在数据收集地区猪肉、猪肝和猪肾中镉、铅和汞均有不同程度超标现象，尤其以猪肝和猪肾超标严重；深圳市猪肉镉的ＴＨＱ大于１，居民食用猪肉存在较高的镉暴露健康风险；其他地区猪肉、猪肝和猪肾中铅、镉和汞ＴＨＱ值均小于１，通过食用猪肉、猪肝和猪肾摄入的重金属量对人体的健康风险低。

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.

In order to solve the problems such as aggregate subsidence and segregation of grouting slurry for backwall of shield tunnel in traditional underground tunnel construction, grouting pipe blockage and slurry stratification are easy to occur. Through single factor test on grouting grout of shield tunnel with cement, sand, fly ash and bentonite as the main raw materials, the influence law of admixture type and admixture amount on grout fluidity, free bleeding rate and segregation rate is obtained, and the admixture amount range is determined. The effects of different material components on the fluidity, free seeping rate and segregation rate of shield mortar cone are analyzed by using uniform design test method. Combined with the related performance indicators, using MATLAB optimization toolbox for the optimal performance of grout ratio simulation optimization test, the high performance shield tunnel wall grouting grout ratio is obtained. The test results show that the optimized grout has a fluidity of 257. 5 mm, a bleeding rate of 0. 71% at 3 h, a bleeding rate of 0. 36% at 24 h, a segregation rate of 3. 1%, a condensation time of 6. 7 h, and a compressive strength of 2. 61 MPa at 28 d. The optimized grout has a good segregation resistance, which essentially solves the problems of easy stratification, segregation and pipe blocking of backwall grouting grout.

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。

针对虚拟机在实际应用环境中，对于不同数据在不同情况下需要不同优先级输出的问题，采用运筹学优先制Ｍ／Ｍ／１排队模型，对虚拟机请求作出网络延迟分析并对传统的顺序输出方法加以改进。结合数据资源在云计算环境下的ＭａｐＲｅｄｕｃｅ模型，提出新的调度算法以及不同于传统算法的度量指标。经过ＣｌｏｕｄＳｉｍ仿真软件进行模拟实验，结果表明，新的算法将网络延迟以及物理机和虚拟机的ＣＰＵ、内存等资源综合考虑，在性能上要优于随机算法、转轮算法等传统算法，大大改善了负载均衡度，缩短任务调度总时间，并使总调度时间的负载效率得以提高。