Researches on Ominimedia Development Strategies and Core Competitive Strength Improvement in the Context of Triple Play

Xu Zhiqiang,He Jialiang,Liu Tong,Li Haidong 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.1

In the context of triple play Ominimedia is not just the simple combination of various media, but the aggregation of all media with different features, communication power and influences,and the interaction and mutual fusion among media of different forms and functions. This paper, based on the development trend of triple play, focused on the theme of Ominimedia, studied the traditional media development strategies to Ominimedia and analyzed in detail the strategies of cloud, tube, end and content aggregation. At the same time it explored the strategies for Ominimedia core competitive strength improvement from multiple dimensions of 3D media, communication channel, AirSharing and brand operation with the expectation of offering references to Ominimedia globalization in the context of triple play.

Compound Machining of Tungsten Alloy Aspheric Mould by Oblique-axis Grinding and Magnetorheological Polishing

Zhiqiang Xu,Jun Wang,ShaoHui Yin,Heng Wu,Liyin Yi 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.22 No.9

With the increase in demand for various types of small-aperture aspherical optical parts, the machining of a small tungsten carbide alloy mould with high accuracy is not only required, but essential. Ultra-precision grinding is generally used to process the small tungsten alloy aspheric mould, but there are some grinding marks and surface defects left by grinding. Aimed at the problems above, this paper introduce a new compound processing technology which integrates ultra-precision grinding and oblique-axis magnetorheological polishing technology on the same machine tool. First, we developed the machining equipment of oblique-axis ultra-precision grinding and magnetorheological polishing, and then, we analyzed the surface accuracy, surface roughness, microstructure and subsurface damage of tungsten alloy aspheric mould after grinding and polishing. The experimental results indicated that the surface accuracy of workpiece was improved to smaller than 200 nm in PV value, surface roughness Ra was reduced to about 1 nm after using the compound processing technology.

Synthesis of Polyolefin In-Reactor Alloys by Periodic Switching Polymerization Process

Zhiqiang Fan,Biao Zhang,Zhisheng Fu,Junting Xu 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.2

DeepPTP: A Deep Pedestrian Trajectory Prediction Model for Traffic Intersection

( Zhiqiang Lv ),( Jianbo Li ),( Chuanhao Dong ),( Yue Wang ),( Haoran Li ),( Zhihao Xu ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.7

Compared with vehicle trajectories, pedestrian trajectories have stronger degrees of freedom and complexity, which poses a higher challenge to trajectory prediction tasks. This paper designs a mode to divide the trajectory of pedestrians at a traffic intersection, which converts the trajectory regression problem into a trajectory classification problem. This paper builds a deep model for pedestrian trajectory prediction at intersections for the task of pedestrian short-term trajectory prediction. The model calculates the spatial correlation and temporal dependence of the trajectory. More importantly, it captures the interactive features among pedestrians through the Attention mechanism. In order to improve the training speed, the model is composed of pure convolutional networks. This design overcomes the single-step calculation mode of the traditional recurrent neural network. The experiment uses Vulnerable Road Users trajectory dataset for related modeling and evaluation work. Compared with the existing models of pedestrian trajectory prediction, the model proposed in this paper has advantages in terms of evaluation indicators, training speed and the number of model parameters.

A Coupling Method of Response Surfaces (CRSM) for Cutting Parameters Optimization in Machining Titanium Alloy under Minimum Quantity Lubrication (MQL) Condition

Zhiqiang Liu,Ming Chen,Jinyang Xu,Shu Han 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.

This paper presents a new flexible method referring to coupling response surface methodology (CRSM) to acquire optimum cutting parameters in machining of difficult-to-cut titanium alloy under minimum quantity lubrication (MQL) condition. Cutting speed, feed rate and depth of cut are designed as three factors by using the Taguchi method, which are also subject to several constraints including processing efficiency, cutting force and surface quality. In addition, turning experiments of titanium alloy were performed in order to set up the model based on Taguchi experimental design and multiple regression method. ANOVA was carried out to prove the adequacy of the developed mathematical model and the influences of cutting parameters on constraints were also observed. The results indicated that the feed rate was the dominant factor affecting surface roughness and cutting forces, which were minimized when the feed rate and depth of cut were set to the lowest level, while cutting speed was set to the highest level. Moreover, the predicted values obtained by CRSM were in good agreement with the experimental values, which indicated that CRSM was an effective method to determine optimum cutting conditions for machining process under MQL condition.

Construction of sports-educational places using resistant and water-repellent raw materials in concrete

Wenbo Xu,Zhiqiang Zhu 국제구조공학회 2023 Structural Engineering and Mechanics, An Int'l Jou Vol.86 No.1

Any place where exercise is common, such as a club, sports hall, or school, is considered a place for teaching sports. When doing sports, a very safe environment for sports should be chosen. The athlete should consider the safety of sports facilities and equipment, and if there is a defect, he should refrain from exercising in these places. The safety of sports facilities is very effective in creating people’s sports activities, with the benefits of staying away from physical harm, enjoying sports, and having mental peace. Everyone has the right to participate in sports and recreation and to ensure that they enjoy a safe environment. The ability to manage and solve issues that may arise plays the most critical role in creating a safe environment. The quality of construction materials used for the construction of sports facilities is of great importance. In this work, the resistance and water repellency of concrete constituents for the construction of sports buildings have been investigated by nanoscience. Nano-concrete material solves the main problem of concrete surfaces, i.e., the entry of water and humidity into the structure. It also gives it a self-cleaning ability with its water repellency. Nanoparticles are placed between pores and cover the cracks, which causes roughness in the surface structure of concrete. The high roughness of the surface of the coated concrete caused its super-hydrophobicity. In hydrophobic surfaces, the higher the contact angle, the more hydrophobic the surface will be. In order to investigate the hydrophobic properties, silica nanoparticles, silica nanoparticles, and fly ash were prepared on concrete, and their properties were analyzed.

20世纪以来北魏都城平城建制研究述要及补缀

徐美莉(Xu Meili1),?志强(Ma Zhiqiang) 동아인문학회 2014 동아인문학 Vol.28 No.-

Schorlars have various understanding about the site of Beiwei’s Pingcheng City and its planning. Some people think the site of Pingcheng City was to the east of Yuhe, some think it stretched over the river, and the others think it was to the west of the rever. Some people think the imperial palace was to the area of north of Beiguan, and others think it was on the district called Caochang. Schorlars are agreed that the imperial palace was in the north of Pingcheng City, the Waicheng was to the south of it, and the Guocheng’ main part was in the south of Pingcheng City. Some people think the imperial palace and the Waicheng were surrounded by the Guocheng, others think the impeial palace stood alone. Some people think the emperor’s Ancestral Temple was to the south of Pingcheng City. Some schorlars think the Deer Park and the imperial palace bordered opon each other, others think they were separate. Some schorlars think Taizong rebulted the Deer Park, and made the Western Garden, the Northern Garden and the Eastern Garden connect together. Others think he built new gardens, the Northern Garden was to south of the Deer Park, and the Eastern Garden arround the Baideng Mountain was new built. As the provisional imperial palace, the Western Palace was ofren confused with the imperial palace, and, the Northern Palace in the Yinshan Mountain was also confused with the one in the Northern Garden. Few people pay attention to the Yongxing Garden and the palaces in it. Schorlars are agreeable to think that the imperial palace was planned in the north of Pingcheng city, and about the changing axile streets of the capital.

Self-Adaptive Power Flow Optimization Method for Multi-Terminal SNOP Considering the Difference of Risk of Node Voltage beyond Limit

Yiming Xu,Zhiqiang Wang,Zheng Fang,Sichao Xun,Guirong Hu,Yusheng Shen,Hongyi Xiao,Dongning Wu 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.5

Soft Normally Open Point (SNOP) is a power electronic device used widely in power distribution network. It can solve many problems by adjusting reactive power compensation and active power transmission. The uncertainty and fluctuation of distributed generation (DG) may cause many problems to the distribution network. In order to balance the safety and economy in power flow optimization better, a self-adaptive power flow optimization method for active distribution network with multi-terminal SNOP considering difference of the risk of node voltage beyond limit is put forward. It takes both weighted voltage deviation and the network loss into objective function to construct the optimal operation model and mainly has two improvements: one is considering initial voltage deviation and real-time penetration of the DG to establish the self-adaptive weight model of the sum of voltage deviation in the objective function; the other is putting forward the weighting strategy for node voltage deviation which decided by the electrical distance, DG position and correlation between source output and load. Then, taking three improved IEEE33 node feeders as an example to verify the validity of the strategy. The results validate that the self-adaptive strategy can reduce the loss and improve the regulation of voltage better and is useful in distribution network under different penetration

Study on the Flexural Performance of Prestressed Concrete Solid Square Piles and Resilient Clamping Connections

Yunsheng Xu,Zhongfan Chen,Ji Fan,Zhiqiang Li,Kai Zhang,Xuesong Tu 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.1

The length of a single prestressed square pile is usually between 6 and 15 meters. For square piles larger than 15 meters, increasing the pile length is generally achieved by a mechanical connection. Currently, the longitudinal reinforcement ratios of square piles are the same, resulting in steel waste. To reduce steel usage in prestressed concrete solid square piles and improve construction efficiency, the safe and reliable use of two different reinforced square piles connected by resilient clamping must be ensured. In this paper, the bending test of a single square pile with different reinforcements is initially carried out. Then, the tensile performance of the resilient clamping connection joint is verified, and finally, a bending test is carried out on prestressed square piles with different reinforcements. The load?displacement curves, flexural bearing capacities and crack developments of the components are studied. The test results show that increasing the longitudinal reinforcement ratio of a single prestressed concrete solid square pile improves its crack and bending resistance to a certain extent. Resilient clamping connects the prestressed square piles with the same reinforcement and different reinforcements, and their crack resistance and bending resistance are almost the same, which demonstrates that the resilient clamping connection of different reinforcement square piles has application value. At the end of the test, the joints were intact, and the pile body was damaged before the resilient clamping connections, which indicated that the resilient clamping connections were safe and reliable and could be used as connecting joints for square piles. The failure of square piles goes through three stages: an elastic stage, a working stage with cracks and a failure stage. Compared with a single square pile, there is no obvious yield stage for a resilient clamping connected square pile.

Evaluating Wealth Management Centers in the Pearl River Delta by Using Principal Component Analysis

Weijun Xu,Shaoying Huang,Zhiqiang Wang 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.12

Because of the rapid development and wealth accumulation in the Pearl River Delta (PRD), most of the cities in this area are motivated to establish wealth management centers (WMCs). We create an evaluation index system for assessing the development level of WMCs in cities in the PRD; we develop this system by selecting 20 indicators including gross regional production (GDP). Subsequently, we use panel data from 2010 to 2013 of nine cities in the PRD to evaluate the financial competitiveness of each of these cities through principal component analysis (PCA); we further analyze the pioneering roles of Guangzhou and Shenzhen in establishing WMCs in the PRD. The numerical analysis results reveal that Shenzhen and Guangzhou rank first and second, respectively, regarding financial competitiveness in the PRD, indicating that the two cities play a leading role in the establishment of WMCs in the PRD.