摘要：Three-dimensional(3 D)gravitational and magnetic exploration is performed using aerial measurement tools,however,this has difficulties with measuring-height design and the construction of a joint-interpretation *** present,the height in such experiments is set according to the measurement scale,and the distribution characteristics of anomalies are not fully ***,we present the idea of using the attenuation characteristics of a singular-value spectrum to evaluate the contributions of various measurement heights and multi-height combinations for inversion to correctly and reasonably design appropriate measuring heights and the number of various measurement heights to be *** jointgradient Euler-deconvolution method can accurately obtain the distribution of geological bodies from 3 D gravitational and magnetic data at an improved resolution,and experimental tests confirm these ***,an actual 3 D aeromagnetic-data-acquisition and inversion test were carried out in the vicinity of the Zhurihe Iron Mine in Inner *** fl ight-height diff erence was set to 60 m,and the specifi c distribution of lodes was obtained by the joint-gradient Euler-deconvolution *** provides a reliable basis for future detailed exploration and proves that the methods presented in this paper have good practicalapplication eff ects and prospects.

摘要：通过黏性土与不同表面粗糙度混凝土板的室内直剪试验,模拟预制桩的界面受力性态。利用微型硅压阻式传感器测定桩-土界面孔隙水压力和土压力的变化,定量分析表面粗糙度对界面抗剪强度参数、界面阻力-剪切位移曲线的影响。试验结果表明:桩-土界面孔隙水压力约占法向应力的10%,实际工程中应考虑;提出桩-土界面阻力的概念,界面阻力由黏性土与混凝土之间黏着力和摩擦力两部分构成,其中摩擦力为界面法向有效土压力与界面摩擦系数的乘积。随着混凝土表面粗糙度的增加,界面黏着力增大且逐渐接近黏土自身黏聚力。表面粗糙度对界面摩擦系数影响较小,但对界面阻力有一定影响,桩-土界面峰值阻力和剪切位移均随粗糙度的增加而增大。试验结果能够为桩基工程的设计、施工与检测提供参考依据。

摘要：基于计算流体力学(CFD)方法,结合国际热核实验反应堆(ITER)中实际使用的设计参数,对硅酸锂球床的传热特性进行了流固耦合传热分析,给出了多种工况下的热工水力结果。同时将用CFD得到的球床区域等效导热系数与相关实验的结果进行了比较。

摘要：液晶回音壁模式(WGM)传感技术结合了液晶材料的高敏感性和光学WGM的高精度特性,在物质检测、环境监测和生物医疗等领域具有广阔的应用前景。为提升传感测量的精度和灵敏度,除了改善传感器的结构特性以外,如提高品质因子、实现窄线宽、提升波长移动范围等,准确标定WGM光谱谱线是一个重要内容。然而,实际应用中,WGM光谱的非规则分布给谱线标定带来了挑战。本文针对此问题提出了一种基于Savitzky-Golay(SG)滤波和高斯平滑的WGM非规则光谱标定方法,并提出了光谱标定的对称性、高线性和合理性三原则。将WGM光谱标定分为规则和非规则两类。对于规则光谱,具有良好的洛伦兹线型和高斯包络轮廓,可以选择最高强度谱线或中心波长,或者具有相同自由光谱范围(FSR)的相邻模式谱线作为谐振波长。而对于非规则光谱,可以分为三类:(1)光谱缺峰和强度突变,主要由于谐振条件的损耗变化所致;(2)光谱非规则劈裂,液晶微腔中可能存在微小的缺陷或杂质,导致光谱的非对称劈裂;(3)混合型变化光谱,受到复杂测量环境的影响,可能出现多种不规则变化。通过SG滤波和高斯平滑处理,有效地恢复光谱的对称性,提升拟合线性度,实现光谱标定。为验证该方法的有效性,根据不同类型光谱标定情况,分别设计了利用液晶WGM对不同生物分子的传感实验,包括胰蛋白酶(浓度0.75~2.00μg·mL^(-1))、pH(4.55~6.86)、DNA(浓度90~490μg·mL^(-1))等。实验结果表明,采用本文方法和三原则进行液晶WGM光谱标定和谐振峰选取,传感灵敏度的线性度均在0.99以上,具有较好的可靠性和稳定性。该研究创新之处在于提出了针对液晶WGM光谱非规则分布的有效标定方法和三原则,为提高液晶WGM传感测量的准确性和有效性提供了有效解决方案和重要的理论和方法支持,具有重要的应用和理论意义。

摘要：2025年1月9日,习近平总书记给国家京剧院青年艺术工作者回信,在国家京剧院建院70周年之际,向全体演职人员表示祝贺和问候,并提出殷切期望:“新起点上,希望你们传承前辈名家优良传统,践行艺术为民,坚持崇德尚艺、守正创新,让京剧艺术持续焕发时代光彩,为繁荣文艺事业、建设文化强国贡献力量。”

摘要：Lorenz systems family unifying Lorenz system, Chen system and Lü system is a typical chaotic family. In this paper, we consider impulsive control Lorenz chaotic systems family with time-varying impulse intervals. By establishing an effective tool of a set of inequalities, we analyze the asymptotic stability of impulsive control Lorenz systems family and obtain some new less conservative conditions. Based on the stability analysis, we design a novel impulsive controller with time-varying impulse intervals. Illustrative examples are provided to show the feasibility and effectiveness of our method. The obtained results not only can be used to design impulsive control for Lorenz systems family, but also can be extended to other chaotic systems.

摘要：由名牌产品和知名企业聚集的城市品牌,是创意经济和文化产业发展的核心。创意城市不仅是文化传播的一个概念,它包含着客观具体的内容,因而相对应于一套完整的评价体系。本文从创意城市的概念出发,探讨创意城市的构成要素和基本类型,总结出创意城市的评价要点,推导出城市创意指数体系,介绍该体系的应用并提供简单的计算方法。

摘要：A damage assessment methodology based on the Hashin failure theory for glass fiber reinforced polymer(GFRP)composite blade is proposed. The typical failure mechanisms including the fiber tension/compression and matrix tension/compression are considered to describe the damage behaviors. To give the flapwise and edgewise loading along the blade span, the Blade Element Momentum Theory(BEMT) is adopted. In conjunction with the hydrodynamic analysis, the structural analysis of the composite blade is cooperatively performed with the Hashin damage model. The damage characteristics of the composite blade, under normal and extreme operational conditions,are comparatively analyzed. Numerical results demonstrate that the matrix tension damage is the most significant failure mode which occurs in the mid-span of the blade. The blade internal configurations including the box-beam, Ibeam, left-C beam and right-C beam are compared and analyzed. The GFRP and carbon fiber reinforced polymer(CFRP) are considered and combined. Numerical results show that the I-beam is the best structural type. The structural performance of composite tidal turbine blades could be improved by combining the GFRP and CFRP structure considering the damage and cost-effectiveness synthetically.

摘要：AIM:To evaluate the application of anterior segmentoptical coherence tomography(AS-OCT)in posterior capsule opacification(PCO)severity assessment and analyse the relationship between PCO severity and intraocular lens(IOL)***:PCO patients were prospectively ***-sectional images of the anterior segment at horizontal and vertical meridians were acquired with *** area of the IOL-PC(posterior capsular)space and PCO severity(area,thickness,and density at 3 mm and 5 mm IOL optic regions)were *** relationship between PCO severity and visual acuity,comparisons of PCO severity and IOL-PC space using varied IOL designs were ***:One hundred PCO eyes were ***-PC space,PCO thickness and area were positively correlated with axial *** addition,PCO area and thickness were positively correlated with visual acuity when it was≤0.52 log *** cut-off level of visual acuity should be 0.52 log *** varied IOL designs,3-piece C haptic IOL showed a smaller PCO area and thickness than the 1-piece 3 haptic IOL and 1-piece 4 haptic *** area and thickness values for an IOL with a diameter≤11.0 mm was greater than for an IOL with a diameter of 12.5 mm,and the differences were statistically *** area and thickness increased when IOL haptic angulation increased(from 0 to 12 degrees).CONCLUSION:In PCO eyes,cut-off level of visual acuity is 0.52 log *** more severe PCO,visual acuity maybenot enough to describe the visual function *** severity and IOL-PC space are significantly correlated with axial length and IOL design and material.

摘要：对于常见的“轮毂-轮辐-轮缘”结构的齿轮模锻件,随着轮毂-轮缘高度差增大,轮毂填充难度就会增大。以轮缘和轮毂同时充满为目标,如何设计合理的预成形成为一个关键要点。通过变换轮毂-轮缘之间的高度差,讨论了平砧镦粗和成形镦粗两种预成形方案。针对一种典型的某型号齿轮锻件,借助于有限元数值模拟软件进行了数值模拟研究,找出了两种预成形方案坯料填充轮毂与轮缘型腔的规律。