A Fixed-time Distributed Algorithm for Least Square Solutions of Linear Equations

Shuling Li,Wu Ai,Jian Wu,Quanxi Feng 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.3

This study presents a fixed-time convergent algorithm to achieve distributed least square (DLS) solutions of networked linear equations. Each agent in the network only knows a subset of the equations and can only exchange messages with its nearest neighbors. Unlike finite-time counterparts, the settling time of the fixed-time distributed algorithm does not depend upon the initial states, and can be preassigned according to the requirements of the task. Numerical simulations verify the theoretical results.

Optimal Design of Micro-expanded ECC and Its Interfacial Bonding Property with Steel Tube

Shuling Gao,Yuyang Zhang 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.10

The large shrinkage strain of Engineered Cementitious Composites (ECC) seriously affects its combined application with steel tube in engineering. In order to reduce the shrinkage of ECC and realize the effective bonding between ECC and steel tube, this paper studied the effects of single or multiple doped of expansive and internal curing agent on the shrinkage and mechanical properties of ECC, and tested the interfacial bond strength between ECC and steel tube. CaO and MgO compound expansive agent (CME), calcium sulfoaluminate expansive agent (HCSA), super water-absorbing polymer (SAP) internal curing agent are chosen for test. The results show that ECC mixed with 10% CME expansive agent and 0.2% SAP shows a slight expansion under the condition of sprinkling water curing. Moreover, the push-out test shows that the bond strength between micro-expanded ECC and steel tube reaches 1.27 MPa, which is nearly 2 times higher than that of the ordinary ECC, and higher than the bond strength of C50 filled steel tube. This paper provides the test and theoretical basis for the joint application of ECC with steel tube.

Influence of Lubricant on the Properties of Poly(ether ether ketone) and Poly(ether ether ketone)/Carbon Fiber Composites

Shuling Zhang,Jianxin Mu,Dianfu Ren,Fugui Zhou,Zhenhua Jiang,Zhongwen Wu,Guibin Wang 한국고분자학회 2010 Macromolecular Research Vol.18 No.12

An improvement in the processability of poly(ether ether ketone) (PEEK) and PEEK/carbon fiber (PEEK/CF) composites with less influence on the other properties is important. A novel high temperature lubricant, GENIOPLAST PELLETS (GPPS), was used to decrease the melt viscosity of PEEK and PEEK/CF composites. PEEK/GPPS and PEEK/CF/GPPS compounds were characterized by dynamic rheometry, universal tester, scanning electron microscopy (SEM), thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results showed that a small amount of GPPS could decrease the melt viscosity of the compounds during processing,and improve the dispersion uniformity of the carbon fiber in the PEEK matrix, and further enhance the tensile strength of PEEK/CF composites, but have little effect the thermal stability of the compounds.

Compression and Shear Properties of Unreinforced Masonry Structures Reinforced by ECC/HECC subjected to High Temperatures

Shuling Gao,Deshuai Hao,Yanping Zhu,Zhe Wang 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.2

In the case of fire, ordinary mortar as the external plastering layer of masonry structure is prone to explosive peeling at high temperature. Therefore, the hybrid fiber reinforced engineered cementitious composites (HECC) is used to replace the ordinary mortar plastering to strengthenmasonry structure, so as to improve the mechanical properties of the masonry structure and the adhesion with the reinforcement layer. In this paper, PB-HECC (mixed with PVA and basalt fibers) and PS-HECC (mixed with PVA and steel fibers) are used to improve the mechanical properties after high temperature, prism compression test and triple shear test are carried out at different temperatures. The test results show that the bonding performance of the engineered cementitious composites (ECC) reinforcement layer is much better than that of ordinary mortar. When the temperature is less than 200oC, the reinforcement layer mixed with basalt fiber (PB group) or steel fiber (PS group) has a higher bearing capacity. PB group has strong energy consumption capacity, but its shear strength decreases the most; When the temperature exceeds 200oC, PS group has the highest compressive capacity, shear bearing capacity and deformation capacity, maintaining relatively good residual mechanical properties.

Developing Coarse-Grained Force Fields for Polystyrene with Different Chain Lengths from Atomistic Simulation

Rao, Shuling,Li, Xuejin,Liang, Haojun The Polymer Society of Korea 2007 Macromolecular Research Vol.15 No.7

We developed a coarse-grained force field and have extended it to polystyrene with longer chain length. A systematic method was introduced and was utilized to explain how the coarse-grained force field for polystyrene could be developed from the atomistic simulation in the paper. We elected to use polystyrene with different chain lengths of 20, 40 and 80 monomers in this study. In three cases, we utilized the same new mapping scheme. The coarse-grained force field does reproduce the bond, angle, and radial distribution of the atomistic model. The coarse-grained model proved successful, as shown by analyses of the static and dynamic properties of different chain lengths.

心理电影赏析融入大学生心理健康教育课程探究

程淑玲(Shuling Cheng) YIXIN 출판사 2023 教育教学研究论丛 Vol.1 No.6

将心理电影赏析融入到大学生心理健康课程教学当中,有利于普及心理常识,提升大学生的心理健康意识;有助于寓教于乐,激发大学生参与课堂学习热情;有助于解读他人,促进大学生的自我成长。本文最后结合笔者的教学经验举例说明一些具有可操作性的教学方案,以期对同行的实际教学有一定的参考作用和借鉴意义。 Integrating psychological film appreciation into the teaching of mental health courses for college students is conducive to popularizing psychological knowledge and improving college students’ mental health awareness; it is helpful to integrate education with entertainment and stimulate the enthusiasm of college students to participate in classroom learning; and it is helpful to interpret others and promote Self-development of college students. Finally, this article combines the author’s teaching experience with examples to illustrate some operable teaching plans, in order to provide some reference and significance for the actual teaching of peers.

社会保障学课程“四位一体”教学模式研究

陈淑玲(Shuling Chen) YIXIN 출판사 2023 教育教学研究论丛 Vol.1 No.3

民办高校党建工作学生样板支部培育创建研究——以武汉工程科技学院学生支部为例

程淑玲(Shuling Cheng),胡美玲(Meiling Hu) YIXIN 출판사 2024 教育教学研究论丛 Vol.2 No.3

在高校基层党建工作体系中,民办高校学生党建工作占据重要地位,同时也是确保我国高等教育事业发展进步不可或缺的一环。着力强化并推进样板支部的培育与建设,对于提升学生党组织的战斗堡垒功能具有重要意义。以武汉工程科技学院学生支部为例,其作为湖北省首批入选的样板支部培育创建单位,成功探索出一种以“四化”为核心特征的学生党支部培育模型,即标准化党员培养模式、时事化党建活动引领、常态化志愿服务实践以及导向化榜样典型激励,这一创新性实践为基层学生党建工作的理论与实践提供了新的视角、策略和路径,从而有力推动了学生党建工作的创新发展。 In the grassroots party building work system of universities, the party building work of students in private universities occupies an important position, and is also an indispensable part of ensuring the development and progress of China's higher education cause. Strengthening and promoting the cultivation and construction of model branches is of great significance for enhancing the combat fortress function of student party organizations. Taking the student branch of Wuhan University of Engineering and Technology as an example, as one of the first selected model branch cultivation and creation units in Hubei Province, it has successfully explored a student party branch cultivation model with “four modernizations” as its core feature, namely standardized party member training mode, current affairs party building activity guidance, normalized volunteer service practice, and guided exemplary incentives. This innovative practice provides a new perspective, strategy, and path for the theory and practice of grassroots student party building work, effectively promoting the innovative development of student party building work.

Action Recognition with deep network features and dimension reduction

( Lijun Li ),( Shuling Dai ) 한국인터넷정보학회 2019 KSII Transactions on Internet and Information Syst Vol.13 No.2

Action recognition has been studied in computer vision field for years. We present an effective approach to recognize actions using a dimension reduction method, which is applied as a crucial step to reduce the dimensionality of feature descriptors after extracting features. We propose to use sparse matrix and randomized kd-tree to modify it and then propose modified Local Fisher Discriminant Analysis (mLFDA) method which greatly reduces the required memory and accelerate the standard Local Fisher Discriminant Analysis. For feature encoding, we propose a useful encoding method called mix encoding which combines Fisher vector encoding and locality-constrained linear coding to get the final video representations. In order to add more meaningful features to the process of action recognition, the convolutional neural network is utilized and combined with mix encoding to produce the deep network feature. Experimental results show that our algorithm is a competitive method on KTH dataset, HMDB51 dataset and UCF101 dataset when combining all these methods.

Experimental and numerical investigation on bearing mechanism and capacity of new concrete plug structures

Yonghong Weng,Shuling Huang,Tangjin Xu,Yuting Zhang 사단법인 한국계산역학회 2019 Computers and Concrete, An International Journal Vol.24 No.5

The stability and safety of concrete plug structure of diversion tunnel is crucial for the impoundment of upstream reservoir in hydropower projects. The ongoing Wudongde hydropower plant in China plans to adopt straight column plugs and curved column plugs to replace the traditional expanded wedge-shaped plugs. The performance of the proposed new plug structures under high water head is then a critical issue and attracts the attentions of engineers. This paper firstly studied the joint bearing mechanism of plug and surrounding rock mass and found that the quality and mechanical properties of the interfaces among plug concrete, shotcrete, and surrounding rock mass play a key role in the performance of plug structures. By performing geophysical and mechanical experiments, the contact state and the mechanical parameters of the interfaces were analyzed in detail and provide numerical analysis with rational input parameters. The safety evaluation is carried out through numerical calculation of plug stability under both construction and operation period. The results indicate that the allowable water head acting on columnar plugs is 3.1 to 7.4 times of the designed water head. So the stability of the new plug structure meets the design code requirement. Based on above findings, it is concluded that for the studied project, it is feasible to adopt columnar plugs to replace the traditional expanded wedge-shaped plugs. It is hoped that this study can provide reference for other projects with similar engineering background and problems.