Hausdorff Dimension and Fractal Dimension of the Global Attractor for the Higher-Order Coupled Kirchhoff-Type Equations

This paper mainly deals with the higher-order coupled Kirchhoff-type equations with nonlinear strong damped and source terms in a bounded domain. We obtain some results that are estimation of the upper bounds of Hausdorff dimension and Fractal dimension of the global attractor.

Estimate on the Dimension of Global Attractor for Nonlinear Higher-Order Coupled Kirchhoff Type Equations

In this paper, we investigate the finite dimensions of the global attractor for nonlinear higher-order coupled Kirchhoff type equations with strong linear damping in Hilbert spaces E0?and E1. Under the appropriate assumptions, we acquire a precise estimate of the upper bound for its Hausdorff and Fractal dimensions.

Global sensitivity analysis based on high-dimensional sparse surrogate construction

Surrogate models are usually used to perform global sensitivity analysis （GSA） by avoiding a large ensemble of deterministic simulations of the Monte Carlo method to provide a reliable estimate of GSA indices. However, most surrogate models such as polynomial chaos （PC） expansions suffer from the curse of dimensionality due to the high-dimensional input space. Thus, sparse surrogate models have been proposed to alleviate the curse of dimensionality. In this paper, three techniques of sparse reconstruc- tion are used to construct sparse PC expansions that are easily applicable to computing variance-based sensitivity indices （Sobol indices）. These are orthogonal matching pursuit （OMP）, spectral projected gradient for L1 minimization （SPGL1）, and Bayesian compressive sensing with Laplace priors. By computing Sobol indices for several benchmark response models including the Sobol function, the Morris function, and the Sod shock tube problem, effective implementations of high-dimensional sparse surrogate construction are exhibited for GSA.

The Global Attractors and Dimensions Estimation for the Higher-Order Nonlinear Kirchhoff-Type Equation with Strong Damping

The initial boundary value problems for a class of high order Kirchhoff type equations with nonlinear strongly damped terms are considered. We establish the existence and uniqueness of the global solution of the problem by using prior estimates and Galerkin’s method under proper assumptions for the rigid term. Then the compact method is used to prove the existence of a compact family of global attractors in the solution semigroup generated by the problem. Finally, the Frechet differentiability of the operator semigroup and the decay of the volume element of linearization problem are proved, and the Hausdorff dimension and Fractal dimension of the family of global attractors are obtained.

Application of Three-Dimensional Visualization Technology in Project Management of Offshore Platform Engineering Construction

Three-dimensional visualization technology converts engineering design drawings and data into graphics or images, realizes virtual reality perception of simulated users in future construction scene, enhances the interaction between project management and technical personnel and engineering construction achievement, and provides intuitive, flexible and strong realistic experience for project management. It can effectively improve the level of project communication, and assist the needs of project construction planning management, training, exhibition, etc. As a tool to help improve project management skills, it has good application effect and prospects.

Cement Resources, Agrominerals, Construction, Marble, Dimension and Decor Stone Resources, Gemstone and Jewelry Resources of Pakistan

Large deposits of cement raw material and resources like limestone, gypsum and shales/clays found from the Koh Sulaiman area of South Punjab (Saraikistan) and Balochistan Provinces, Pakistan. The installation of cement industries especially in South Punjab/Saraikistan Province due to close occurrences of resources should develop the area and increase the export. The Koh Sulaiman regions of South Punjab (Saraikistan) have huge gypsum deposits which deserve for further exploitation. Pakistan is agricultural country and fertility of cultivated lands is vital. Fertilizer resources like phosphate deposits are moderate but the deposits of phosphate and potash bearing rocks are very vast and need their further explorations and exploitation in the Indus Basin. Pakistan has very large construction, dimension and decor stone deposits like limestone, marble, dolomite and igneous rocks like granite, dolerite, serpentine, etc. which needs further exploitation for the development of the areas and increase export. Pakistan is spending a lot of earnings for importing glass, glass wares, pottery, clay, etc. while Pakistan has these resources which needs exploitation of own resources. The best structures and geotectonic elements like the Northern and Western Indus Sutures and Karakoram Suture and Indus placers which are rich in gemstones and jewelry resources. To increase gems and jewelry export, these industries requires reduction in gemstones smuggling and encouragement for gem appraisal and jewelry industry at high level for value addition. In short, Pakistan is rich in natural resources but poor in development. Try should be made to develop and export the own mineral commodities like cement, gypsum, marble, gemstones and jewelry.

Evaluation of Tubal Patency with Transvaginal Three-dimensional Hysterosalpingo-contrast Sonography

Objective To investigate diagnostic efficacy of transvaginal three-dimensional hysterosalpingo-contrast sonography(3D-Hy Co Sy) in assessing tubal patency with chromolaporoscopy. Methods A total of 157 infertile women underwent 3D-Hy Co Sy to evaluate tubal patency. Among these patients, 39 patients were also examined by chromolaporoscopy. The concordance of the two clinical assessment methods was analyzed by the Kappa coefficient test. Results Among the 306 oviducts examined by 3D-Hy Co Sy, 99(32.4%) were patent, 126(41.2%) partially obstructed, and 81(26.5%) completely obstructed. Diagnostic results with 3D-Hy Co Sy were not statistically different from those obtained in the 39 women(78 oviducts) who also underwent chromolaporoscopy, and the two methods showed a high concordance(κ=0.747, P=0.000). The 3D-Hy Co Sy procedure had a sensitivity of 84.8%(28/33), a specificity of 96.2%(25/26), and positive and negative predictive values of 93.3%(28/30) and 86.2%(25/29) respectively. Conclusion Transvaginal 3D-Hy Co Sy can accurately reveal the spatial path and morphology of the oviduct and is a safe and effective method to evaluate tubal patency.

Local Preserving Graphs Using Intra-Class Competitive Representation for Dimensionality Reduction of Hyperspectral Image

As a key technique in hyperspectral image pre-processing,dimensionality reduction has received a lot of attention.However,most of the graph-based dimensionality reduction methods only consider a single structure in the data and ignore the interfusion of multiple structures.In this paper,we propose two methods for combining intra-class competition for locally preserved graphs by constructing a new dictionary containing neighbourhood information.These two methods explore local information into the collaborative graph through competing constraints,thus effectively improving the overcrowded distribution of intra-class coefficients in the collaborative graph and enhancing the discriminative power of the algorithm.By classifying four benchmark hyperspectral data,the proposed methods are proved to be superior to several advanced algorithms,even under small-sample-size conditions.

The Dimensions of Graphs and Constructions of Their Bases

Let G(V,E) be a connected graph and W{w 1,w 2,…,w k} an ordered set of V. Given v∈V, the representation of v with respect to W is the k-vector r(v|W)(d(v,w 1),d(v,w 2),…,d(v,w k)). The set W is a resolving set of G if r(u|W)r(v|W) implies that uv for all pairs {u,v} of vertices of G. The resolving set of G with the smallest cardinality is called a basis of G. The dimension of G, dim (G), is the cardinality of a basis for G. The bound of a Cartesian product of a connected graph H and a path P k was reached: dim(H)≤dim(H×P k)≤dim(H)+1. Then, the dimension value of some graphs was given. At last, the constructions of some graphs’ bases were showed.

Research on the Three-dimensional Modeling and Optimization of a Virtual Tower Crane Based on 3DS Max, Solidworks and EON Professional

Three-dimensional modeling of virtual hoisting machinery is the critical works to structure the system of virtual construction, and the foundation to realize intelligent and interactive virtual hoisting. Aimed at enhancing the requests of image quality and stability of the virtual construction scene, taking a tower crane for example. We studied the technology of three-dimensional modeling and optimization of a virtual tower crane, and a method named two-stage model optimization was put forward. This depended on the modeling stage using Solidworks and 3DS Max and the performance optimization stage in EON. The practice of software development indicates that the proposed methods of three-dimensional modeling and optimization could satisfy the performance request of virtual construction system and be popularized to other virtual system.

Accuracy of Low-level Surface in Hierarchical Construction of Potential Energy Surface

The effects of low-level PES on the overall accuracy of the final surface constructed by using hierarchical construction were investigated with the constructions of a number of global surfaces for the H3 system at UHF （UMP2, DFT-B3LYP, UCCSD（T））/vtz, and UCCSD（T）/avqz levels of theory. The total reaction probabilities for the H＋H2 reaction calculated on these surfaces revealed that the accuracy of UCCSD（T）/avqz surface is very close to the well-known BKMP2 surface, while the UCCSD（T）/vtz PES has a slightly higher barrier. In contrast, the low-level theories （UHF, UMP2, DFT-B3LYP） with vtz basis set can only provide a qualitative description of this simplest reaction despite the fact that they are widely used to study reactions in complex systems. On the other hand, although these theories are not accurate on describing the reaction, they can be used to provide the low- level PESs for hierarchical construction of the UCCSD（T）/avqz PES with the number of UCCSD（T）/avqz energies substantially reduced.

Risk Assessment and Prediction of Construction Project Based on 1D-CNN-Attention-BP

In order to solve the problem of low accuracy of construction project duration prediction, this paper proposes a CNN attention BP combination model project risk prediction model based on attention mechanism, one-dimensional convolutional neural network (1d-cnn) and BP neural network. Firstly, the literature analysis method is used to select the risk evaluation index value of construction project, and the attention mechanism is used to determine the weight of risk factors on construction period prediction;then, BP neural network is used to predict the project duration, and accuracy, cross entropy loss function and F1 score are selected to comprehensively evaluate the performance of 1d-cnn-attention-bp combined model. The experimental results show that the duration risk prediction accuracy of the risk prediction model proposed in this paper is more than 90%, which can meet the risk prediction of construction projects with high accuracy.

湿陷性黄土区输水隧洞盾构施工风险评估

为了提高针对湿陷性黄土区输水隧洞盾构法施工安全评估的可靠性,从人员管理、机械材料、施工技术、施工环境4个方面构建较为完善的施工安全风险评估指标体系;利用灰色-DEMATEL方法对中心度进行处理得到风险指标权重;以风险发生概率和风险损失程度两个维度为基础构建二维云评估模型,其中发生概率由主、客观方法相结合来确定,损失程度通过改进雷达图法从人员伤亡、经济损失、工期延误、功能缺陷和环境影响5个方面来综合确定。将该评估模型运用到引汉济渭工程X输水隧洞盾构法施工项目的安全评估中。结果表明:该项目施工风险评估等级为Ⅱ级,施工安全风险程度较小,评价结果符合工程实际,验证了该评估模型的可行性和有效性。研究成果可为湿陷性黄土区类似输水隧洞盾构法施工安全风险评估提供借鉴和参考。

基于多维能力和知识图谱-多层感知机的变压器运行状态画像构建方法

利用大数据和画像技术对电力变压器运行状态进行准确评价有利于保障电力系统的安全稳定运行。针对电力变压器运行状态传统评价方法存在的评价维度过于单一、主观性较强等不足,提出了一种基于多维能力和知识图谱-多层感知机的变压器运行状态画像构建方法。首先,构建了由绝缘水平、负载能力、抗短路能力、能效等级和调压能力五个能力构成的变压器运行状态画像体系;然后,融合知识图谱(knowledge graph,KG)与多层感知机(multilayer perceptron,MLP),建立了一种变压器运行状态画像分析模型;最后,基于某地区1368台110kV变压器的实际运行数据,开展了变压器运行状态画像的实例分析,并与随机森林(random forest,RF)和支持向量机(support vector machine,SVM)方法的画像分析结果进行对比。研究结果表明,所提方法对变压器运行状态画像的准确率达到96.35%,优于RF算法(准确率89%)和SVM算法(准确率77%),为电力变压器的运行状态评价提供了一种新思路。

断控缝洞型碳酸盐岩立式板状油藏注采井网构建

断控缝洞型碳酸盐岩油藏缝洞结构和连通关系复杂,传统井网部署易产生低产能井,需构建立体注采井网以提高产能。通过油藏数值模拟研究了不同因素对塔里木富满油田满深3和满深4井区立体注采井网波及系数的影响,并设计了先导试验方案预测产能。结果表明,满深3井区注气井与采油井单个交错排状分布时波及系数最大;采油井纵向深度越大,波及系数越大;平面注采井距在500~1000m波及系数相对稳定,井距增至1500m时,波及系数大幅度减小。满深4井区注气井、注水井与采油井单个交错排状分布时波及系数最大。先导试验中,满深3和满深4井区分别采取“浅部注N_(2),深部采油”和“顶部注N_(2),底部注水,中部采油”的井网构建方案,阶段末采出程度分别达到21.3%与22.4%,相比于基础衰竭式开发和注水开发方案有了显著提升。

多学科联合多维度产后避孕服务模式的构建与应用

目的探讨多学科联合多维度产后避孕服务模式的建立及实践效果,为形成适宜医疗机构应用的产后避孕服务模式提供参考,保护女性生殖健康和生育力。方法采用非同期对照临床试验设计,便利选取该院2021年6-8月定期产检的育龄妇女1200例作为试验组,将2021年3-5月定期产检的育龄妇女1200例作为对照组。试验组采用多学科联合多维度产后避孕服务模式在妇女孕晚期及分娩期,产后42 d,产后6、12个月进行产后避孕知识宣教、避孕措施落实和随访,产后避孕服务档案信息多学科互通互享管理;对照组采用常规产后避孕服务方法。干预完成后对2组妇女产后避孕知识知晓情况及格率、性生活恢复时间、产后避孕启动时间、产后1年内持续规范避孕率、产后1年非意愿妊娠率、产后1年人工流产率、产后1年内采取避孕方法等进行统计分析。结果试验组妇女产后避孕知识知晓情况及格率、性生活恢复时间、产后避孕启动时间、产后1年内持续规范避孕率、产后1年非意愿妊娠率、产后1年人工流产率、产后1年内采取避孕方法等明显优于对照组,差异均有统计学意义(P<0.01)。结论采用多学科联合多维度产后避孕服务模式,利于提高育龄妇女产后避孕知识知晓率与避孕意识、落实长期高效避孕措施,降低产后1年内非意愿妊娠率、高危流产率等。

基坑开挖引起下穿交叉隧道变形效应分析

以某地铁站换乘大厅工程为例,利用FLAC 3D数值模拟软件,分析总结了上跨深大基坑开挖对不同空间距离和分布形式的下穿立体交叉隧道的变形影响规律,并结合现场监测数据与数值模拟结果进行相互验证,结果表明:(1)基坑开挖卸荷对下穿隧道结构变形的影响主要表现为竖向位移,其变形量与基坑的空间位置和基坑岩土体开挖卸荷量密切相关;(2)1号线左、右线隧道全施工周期监测数据与数值模拟结果吻合较好,验证了数值计算方法对施工活动影响判断的准确性;(3)多种应力状态耦合的叠落隧道竖向位移受叠加效应影响显著,最大竖向位移位于影响因素较多的区域,最大竖向位移值为34.84 mm;(4)埋深较浅隧道对施工扰动比深埋隧道更加敏感,不同位置处的变形离散性更强,变形具有一定的整体性和协同性。

基于三维特征构建和扩张残差网络的机械故障音频识别方法

已有的基于音频的机械故障识别方法,大多是使用二维神经网络和音频信号的某个单一特征(如功率谱)进行故障检测,然而单一的音频特征在提取过程中可能会存在关键信息丢失的现象,且往往只能提取音频特征的单一维度(如空间上)信息,这极大限制了现有设备故障音频算法的有效性.为了探究解决上述问题的方法,本文提出一种包含不同音频特征的三维特征构建方式,利用不同的音频特征弥补特征提取过程中的关键信息;并且构建了三维扩张残差网络模型(DR-3DCNN),采用空洞卷积的方式增大模型对全局的关注,同时获取不同尺度的特征信息;充分利用不同特征之间的相关性,建立特征与原始音频数据的深层次关联;最后,采用公开的故障工业机器调查和检查数据集(MIMII)进行实验.实验结果表明,三维特征和DR-3DCNN相组合的方式,其机械故障识别分类效果有了显著提升,分类准确率好于以往单一音频特征的识别算法.

智能时代职业教育专业群立体化建设:现实困境与路径优化

进入信息时代,大数据、人工智能等技术的快速发展助力职业教育专业群实现了立体化创新改革。在改革建设过程中,职业院校严格秉持多维价值内核的同时,还需要打造符合时代发展潮流的应用模式,为职业教育专业群立体化建设夯实发展基础。然而,要实现智能时代职业教育专业群立体化建设,仍旧面临发展目标笼统、建设方案错位、管理标准缺失等问题。为此,可通过明晰专业群建设原则、完善专业群建设方针、设立专业群动态化管理标准等措施,寻求优化路径。

数字统战的三维建构与路径研究

数字化时代,各级统战主体需要锚定数字技术发展趋势,扎实推进数字化转型升级,着力构建党建引领的统战工作智治新格局。立足于习近平总书记关于发展数字经济、习近平总书记关于做好新时代党的统一战线工作的重要思想,从数字统战的基本内涵入手,在厘清网络统战与数字统战关系的基础上,总结数字统战特征,分析现实面临困境,从统战主体、统战对象和统战载体三维建构角度,提出数字统战工作的实现路径,为我省的数字统战工作提供参考。