bluuebunny/crossref_metadata_2025 huggingface dataset:
Automated Test Case Generation for Effective Spectrum-based Fault Localization
Authors: Yang Bo , He Yuze , Feng Lixing
Published: July 2020

Software testing is the key to ensuring software quality. Test case generation and software fault localization are two important research objects of testing. Spectrum-based fault localization (SBFL) method is a mainstream dynamic fault localization method, which inputs test cases into the program for execution and collects statement coverage information and execution results. By analysing this information, a fault report can be generated. The performance of SBFL is affected by test case quality. Therefore, this paper proposes a test case generation method based on improved genetic algorithm to assist SBFL. This method uses a small number of initial test cases to execute the program, then uses the XGBoost model to pre-process the spectrum information and generates a list of potential fault statements to guide the iterative process of the genetic algorithm. The experimental results show that the test cases generated using the improved genetic algorithm have certain advantages over the test cases generated by general genetic algorithm and the baseline test cases.
Research on Testing System for an Intelligent and Connected Vehicle
Authors: Feng Jiacheng , Song Wenxuan , Zhan Haiting , Bai Junchao
Published: July 2020

Due to the increase of automatic driving and network connection function, the testing system of intelligent and connected vehicle (hereinafter referred to as ICV) is quite different from traditional vehicle’s. This paper presents the testing systems of ICV which based on the technology of virtual simulation, semi-physical simulation, and real vehicle test. The testing contents including automatic driving computing platform test, perception system test, network connection and information security test, HMI and ergonomics evaluation, and road test, which covers the automatic driving function, safety, comfort and reliability. The paper introduces the integration architecture and working principles of the testing systems which involves MIL, SIL, HIL, DIL and VIL. The physical relationship of each module in the system is shown by pictures. Finally, the paper summarizes the characteristics and trends of testing system and method. The ICV testing architecture proposed in this paper offers reference for the construction of related laboratories and provide guarantee for ICV application.
Mouse Cursor Control Using Hand Gesture Recognition Based on PHOG-Improved LBP and K-NN Classification
Authors: Yi Jin , Chen Kang , Wang Jun , Ou Mingmin , Wu Yi
Published: July 2020

A real-time mouse cursor control system using static gestures was designed to achieve the goal of human-computer interaction (HCI) in this paper. The system uses the computer’s own camera or external USB camera to collect video data, detect and recognize gestures of people in the video, and control the cursor movement or click in real time based on the gesture. To improve the recognition accuracy of hand gesture images detection, a method of hand gesture images detection based on PHOG + Improved LBP + K-NN was proposed in this paper. In order to improve the real-time performance of the system, the system determines whether the current frame has human hands by skin color detection. When human hands are detected, Pyramid Histogram of Oriented Gradients (PHOG) features and the improved Local Binary Pattern (LBP) features are further extracted. After fusing PHOG features and improved LBP features, k-nearest neighbor classification (K-NN) is used to implement gesture recognition. Six different gestures were tested 50 times with different angles, different lights and no skin tone in the background. The experimental results show that the system has good recognition performance.
RETRACTED: Research on Enterprise Culture Construction Based on Computer Multimedia
Authors: Lin Bai
Published: July 2020

This paper mainly discusses the connotation of enterprise craft culture construction from the perspective of computer technology enterprise culture construction. The ideas and methods of building craftsman’s spirit and culture under computer technology are put forward.
Research on Industrial Residential Buildings Based on Computer Big Data
Authors: Liu Bo
Published: July 2020

As an inevitable choice for sustainable urban development, industrialized residential buildings are being paid attention to and adopted by more and more countries and regions in the world. Compared with traditional construction methods, IRB has the advantages of reducing environmental pollution, improving production efficiency and ensuring construction quality. Over the past 15 years, leading international architectural journals have published a number of articles on prefabricated construction management, off-site construction management, and industrial construction. This paper studies the latest research trends in this field, and qualitatively analyzes 80 research papers published in 10 major journals from 2005 to 2020 from the aspects of research content, research methods, and core research fields (now available online). This paper USES computer big data to analyze the literature. Analysis shows that the impact of the IRB on the construction industry as a whole is increasing.
Composite Self-healing U-shaped Canal Material and Fabrication Based on Computer 3D Modeling Technology
Authors: Song Changhong , Wang Yingtao , Wang Hongbo , Zhu Guichen
Published: July 2020

Attributing to multiple advantages such as lightweight and excellent impact resistance, plain-woven composite self-healing U-shaped canal material has been extensively applied in various fields. As it is used as the main bearing part, the existence of cracks can significantly reduce the service performance and safety factor of the material. During the usage, the internal cracks continue to expand and accelerate the material failure. In this paper, the features of four-step weaving technology are analyzed, and the yarn trajectory is simulated by the relevant computer software based on the simulation characteristics. The computer graphics technology is used to present the 3D weaving structure. The design and implementation process of composite self-healing U-shaped canal material based on the 3D modeling technology is simulated by the computer. Based on the relationship of the weaving process parameters, simulation parameters are set in the computer software to facilitate the generation of 3D weaving models for various sizes and simulation corners. This computer simulation method allows the model to approach the real structure of woven fabric infinitely, which has implemented the characterization for the damage evolution of plain woven glass fiber composite self-healing U-shaped canal material in the in-situ shear test. The geometric information of the yarn section is obtained by scanning the image, including the long and short axis in the elliptical section of the yarn and the yarn path. Spatial positioning is performed on the defects to obtain the material defect rate by statistical analysis of its volume fraction. Statistics on the geometric parameters of the yarn are performed to establish a finite element model. Given the impact of hole defects, the finite element model with defects is established. The corresponding numerical simulation of the shear test is conducted, and the impact of defects on material failure is analyzed and revealed from the aspects of modulus, strength and damage.
Analysis on the Image Project of Hubei Local Cities under the Computer Operation: Based on the News Data of “the Hubei Daily” in 2019
Authors: Xie Chen , Qin Xiaoya , Hu Jingyu
Published: July 2020

The construction of the image of city is not a spontaneous process, it has strong relationship with media under the computer operation. This study collected the news reports of Xiangyang, Yichang and Jingzhou in the Hubei Daily in 2019, and conducted an in-depth analysis of the media images of these three cities by the computer calculation. It is found that Xiangyang, Yichang and Jingzhou were represented into different kinds of image, and especially, there were significant differences in the theme of reports. Based on the results, it is advisable for each city to create unique resources and to present personalized images. Meanwhile, it is also necessary to take use of the computer operation, so that a much more scientific, systematic and reasonable image project of cities could be established.
The Improvement of Teaching Design Ability of Physical Education Major Based on Computer Media Scene Teaching Video Model under the Concept of OBE Teaching
Authors: Shi ChengKun
Published: July 2020

The teaching design ability of physical education specialty based on the teaching concept of computer media OBE can effectively carry out the teaching, improve the teaching quality and realize the optimization of physical education teaching. The teaching design of physical education major adopts the concept of OBE and computer media situational teaching video model, which requires the diversification of teaching skills training and the establishment of a comprehensive training system. This paper firstly analyzes the teaching objectives and teaching design of physical education major in China, and then studies the influence of computer media on the teaching design ability of students majoring in physical education. Finally, it gives the strategies to improve the teaching design ability of physical education major by integrating the conceptual model and scene teaching video of OBE.
Finite Element Analysis of Badminton Engineering Mechanics Driven by Computer-aided Technical Movement
Authors: Zhou Chunli
Published: July 2020

Badminton is a sport carried out relatively well in the sports, recreation, and fitness programs in China. There are many basic batting techniques in badminton. Among them, the technical movements feature the short flight path, straight arc, short time, and fast fall, which are the techniques required for the attack players. Throughout the development history of badminton sports skills and tactics, in the singles and doubles badminton competitions, powerful kill movement techniques, especially back-field movement techniques, are essential means of scoring in the match. In this paper, the computer-based Ariel system and myoelectric telemetry system are used to analyze two technical movements of male players in the badminton team, that is, near-net forehand smash and far-net forehand smash, to lay a foundation for comprehensive quantitative analysis of badminton technical movements while avoiding sports injuries due to irregular movements at the same time. The potential commonalities between different athletes’ different technical movements are explored to lay a theoretical foundation for further improving the badminton technical movements.
Research on Fine Reservoir Distribution Based on Computer Modeling of Horizontal Well Data
Authors: Feng Deying
Published: July 2020

With the decrease of oil reserves, the difficulty of oil reservoir exploitation is increasing day by day. In this case, the development of oil reservoir research is becoming more and more important. There are more complicated continental reservoirs in Chinese oilfields, which makes the development of oilfields more difficult. The traditional way of describing oilfields can no longer accurately describe the complex petroleum geological environment. Therefore, a more efficient and detailed description of modern reservoirs is needed. Methods, using computer modeling to analyze horizontal wells and quantitatively study the reservoir conditions.
RETRACTED: The Construction of an Evaluation System for the Post Competence of College Foreign Language Teachers Based on Computer Big Data Technology
Authors: Peng Nan , Yang Gang , Wang Kai , Yang Chao
Published: July 2020

This paper plans to comprehensively evaluate the post capacity of college English teachers by combining the computer big data technology with the equivalent multi-level weighted index method. Through the analysis, this paper constructs the post competency index of teachers in colleges and universities, and integrates the teaching achievements, scientific research achievements, attendance results and the subjective evaluation results of students and colleagues, so as to realize the comprehensive evaluation of teachers. Teacher comprehensive working ability price. This index applies not only to college English teachers, but also to the evaluation of other college teachers.
Exploration of the Application of Mind Mapping Combined with Computer Technology in Computer Teaching
Authors: Shao Haijun
Published: July 2020

Objective: To explore how to combine mind mapping with computer technology in computer teaching. Methods: According to the natural division method, 39 students in the first class used the interactive teaching method of mind map, 36 students in the second class used the interactive teaching method of brainstorming to compare the passing rate of the final examination between the two classes. Results: The pass rate of class one was significantly higher than that of class two, especially the pass rate of female students in class one was 52.4% higher than that of class two. Conclusion: Mind mapping is more suitable for computer teaching in colleges and universities. We should combine mind mapping with computer technology to improve teaching quality.
Application Research of Computer Technology in Agricultural Land Use and Ecological Environment Construction
Authors: Yang Hanyu , He Ruhai , Rao Qin , Zhang Xili
Published: July 2020

The utilization of farmland resources has an important impact on the local ecological environment. At the same time, with the development and update of computer technology, it also provides us with more technical means in the application of agricultural land use and ecological environment construction. This paper studies the changes of land resources in the construction of new urban areas, analyzes the changes of the ecological environment in new urban areas, and puts forward the measures for the application of agricultural land use combined with computer technology and the construction of ecological environment. It is concluded that the ecological environment of the new district of a city is greatly affected by the change of land use pattern, and shows positive and negative effects in different regions.
Research on High Precision Algorithm Based on the Transformation of Computer Accounting Financial Management and the Transformation of Fractional Differential Equation
Authors: Fan Hongmei
Published: July 2020

With the continuous prosperity and progress of economic globalization, the continuous updating of computer technology makes our society enter the era of information technology. In the context of information technology, the management of information in various industries depends on the use of computer technology. In the process of accounting and financial management, the use of transformation and transformation helps financial managers to lay a good mathematical foundation. This kind of thought can help them to carry on the audit work more easily. In addition, the research on the algorithm of fractional differential equation can obtain high-precision numerical solution with fewer practical nodes. Its use can also improve the efficiency of accounting and financial management.
Application Research of Water Ecological Restoration Technology Based on Computer in River Channel Management
Authors: Ma Huanchun , Xiong Ying , Hou Xin , Shu Qiaosheng
Published: July 2020

With the rapid development of the national economy, China has completed the preliminary well-off society. However, with the development of economy, China’s water ecological resources have suffered a lot of losses. Therefore, water ecological restoration technology has become an important technology in river management, especially when combined with computer technology, it can effectively repair water bodies and improve the quality of water resources. Through the natural purification system, we can gradually purify the water quality, which will play a role in the integration of human and nature. Firstly, this paper analyzes the commonly used technology of water ecological restoration based on computer. Then, the main problems of water environment and water ecology are put forward. Finally, some suggestions are put forward.
Construction and Design of Multimedia Virtual Simulation Practical Teaching System of Ultrasound Image in Obstetrics
Authors: Liu Hui , Zhang Hui , Zhong Yi , Xin Yalan , Han Yang
Published: July 2020

With the non-destructive, cheap, and real-time advantages, ultrasound diagnosis is one of the indispensable imaging diagnostic techniques in modern clinical medicine. The coherent nature of ultrasound imaging results in a low signal-to-noise ratio of ultrasound images, which adversely affects quantitative analysis and diagnosis. In practical applications, ultrasound diagnosis often has disadvantages such as the varying accuracy dependent on the doctor’s experience, the image feature extraction and analysis methods lagging behind the development of imaging technology, etc. Guided by the concept of “Mix of virtual and actual reality, multivariate cooperation”, the quality of experiment teaching in obstetrics and gynecology should be improved to achieve the experimental teaching goal of obstetrics and gynecology. In this paper, the necessity and characteristics of medical virtual simulation experiments are first analyzed. Subsequently, the construction of the medical virtual simulation experiment is expounded. Finally, how to carry out the experimental teaching of gynecology and obstetrics is summarized.
Computer Simulation Research of Desk Design Based on ABC Attitude Theory
Authors: Zhang Jin , Zhang Liqun
Published: July 2020

In this study, researchers use quantitative variable analysis methods to describe the decomposition process of desk design by establishing desk design models. A series of purposeful and conditional processes are used to decompose the features of the desk, so as to obtain the quantitative index of the overall favourability, and provide decision makers with the analysis results of the favourability of the desk design as a theoretical basis for decision-making.
Research on the Development Model of Tourism Poverty Alleviation in Western Poor Areas Based on Computer Network
Authors: Zhou Jing
Published: July 2020

The dynamic mechanism of tourism poverty alleviation involves multiple forces such as government entities, tourism enterprises, local residents, non-governmental organizations, etc., make full use of the resources that may be mobilized and play the role of the government’s backbone in poverty alleviation in tourism. Stakeholders distribute benefits fairly and provide reasonable policy support. Strengthen the promotion of tourism scenic spots, build the image of national cultural tourism brands, expand the tourist source market, enhance the popularity of tourist scenic spots and use computer network technology to facilitate the development of tourism in its poor areas.
Research on the Application of Computer Recording Technology in Modern Chinese Bopomofo
Authors: Xu Lei
Published: July 2020

With the development of science and technology, the computer has gradually replaced the pen and paper, and even is more important in many occasions. Also, people’s dependence on the computer is deepening. While the importance of Bopomofo is in decline, Bopomofo teaching has been in a dangerous position. But actually, Bopomofo is the foundation of learning Chinese, the importance of language learning is self-evident. This paper mainly discusses the application of modern Chinese Bopomofo in computer recording technology.
Advances in the Study of Genetic Diversity of Important Marine Animals in China by Using Computer Aided Systems
Authors: Xu Li , Yu Hui , Zhao RuiYuan
Published: July 2020

The study of genetic diversity of Marine animals can not only reveal the origin and evolution history of species, but also provide theoretical basis for the conservation of genetic resources, breeding and genetic improvement of mariculture animals, as well as the restoration and stability of the entire Marine ecosystem. In this paper, the genetic diversity of important Marine animals (mainly including fishes, shrimps, crabs and shellfish) in China in the past ten years is reviewed. Their application in germplasm identification, system evolution, population genetic structure analysis, improvement of plant species, and other aspects this paper expounds the further promote Marine animals, genetic diversity research, speed up the cultivation of excellent germplasm resources, and promote the healthy development of Marine aquaculture, realize the reasonable development and sustainable utilization of Marine biological resources.
RETRACTED: The Analysis of Higher Vocational Education Informationization Teaching and Training Mode Based on Computer Technology
Authors: Li Lin
Published: July 2020

With the increasing strength of the national economy, more and more attention has been paid to the development and training of talents, especially the training of talents in higher vocational education. It is the school’s unremitting efforts and pursuit to cultivate professional and skilled talents. Therefore, in order to output more application-oriented talents to the society, higher vocational colleges will actively use the computer information teaching and training model, greatly improve students’ interest in learning, to help students develop in an all-round way. This paper mainly studies and analyzes the elements and development trend of the practical training teaching mode in higher vocational colleges under the condition of computer information technology.
On the Practical Application of Computer Technology in the Field of Volleyball Training in China
Authors: Rao Liwei
Published: July 2020

Volleyball is a popular sport in the world. It is a complex tactical sport with strong antagonism and comprehensiveness. Volleyball training and volleyball competition are the work that our country sports circles attach great importance to. In order to help the players improve their skills and competition ability, China has invested a lot of manpower and material resources in the field of volleyball training. The relationship between modern volleyball training methods and computer technology is more and more close. This paper analyzes and studies the application of computer technology in the field of volleyball training, and finally comes to a conclusion.
The Study on Interior Design of Yunnan New Rural Residence Based on Spatial Structure Complete Computer CAD
Authors: Li Long
Published: July 2020

Based on the detailed research and analysis of the current situation of the new rural residence in yunnan, this paper combined with the construction of the new rural residence space to express the re-thinking of the interior design. The use of definitions and dimensions considering interior design as a starting point, detailed analysis of some issues without the actual interior design of the new rural residence in yunnan. Combined with computer CAD technology, some targeted optimization or rectification methods are proposed to be more in line with the actual situation, so as to obtain new research results in the construction of new rural housing.
Application of Computer UAV Remote Sensing Technology in Building Engineering Surveying and Mapping
Authors: Liu Mingyang , Luo Xiangling , Liu Nan , Chen Lan’e
Published: July 2020

UAV remote sensing systems are widely used in environmental investigations. It is mainly used to classify land resources and monitor environmental land in urban areas to fully grasp urban land resource information. At present, some government departments in China have tried to use unmanned aerial vehicle remote sensing systems for environmental investigations. Using high-definition digital cameras equipped with unmanned aerial vehicles to carry out environmental surveys in rural and urban land resources. The unmanned aerial vehicle remote sensing system obtains a remote sensing map to provide a basis for the measurement of land use rights, reduces the investment in traditional land measurement manpower and material resources, greatly improves the measurement efficiency and meets the precise requirements of government departments for environmental monitoring. This article analyzes and explores the application of UAV remote sensing technology in surveying and mapping.
Inheritance and Innovation of Traditional Folk Music “North Shifan” based on the Computer Information analysis
Authors: Xu Ning
Published: July 2020

Rich and delicate in the expressions of feelings, “North Shifan” music is more distinctive in melody than other music. It has more abundant emotional expressions and can express emotions from sadness to joy. “North Shifan” music is an essential aspect of Chinese culture and art. In this paper, the historical characteristics and current challenges in the development of North Shifan music are analyzed based on elaborating the development of three intangible cultural heritage inheritance bases, the impartation and inheritance of Cuxi Shifan music scores in the traditional folk areas with the development of the times. Suggestions on the inheritance and development of North Shifan music are proposed from six aspects: government funding support, industrial policy support, talent policy implementation, education and inheritance, academic research, promotion and application and we analysis the inheritance and innovation based on the computer information technology.
RETRACTED: Research and Planning of Smart City Based on Computer Big Data Participation
Authors: Liu Xiao , Han Peng
Published: July 2020

With the rapid development of domestic economy, the process of urbanization is accelerating. According to the national unification and the national economic operation data released by the Planning Bureau in 2015, the urbanization population accounts for the total population 56.1% of the total. The rapid development of urbanization has promoted the economic and social development of the city. However, the development of urbanization brings about a series of urban problems as well as urban economy. For example, urban resources are increasingly tense, urban environment is becoming worse, and urban livelihood issues are becoming more and more serious. The more complicated. It is everyone’s wish to promote the harmony of life and improve the quality of life. How to reasonably apply computer big data technology to the construction of smart city has become an important topic for researcher significance to improve the employment rate to give full play to the role of counselors in employment guidance.
Fire Risk of Electric Bicycle Based on Fuzzy Bayesian Network
Authors: Li Ying , Han Lei , Ning Xiuli , Xu Yingcheng
Published: July 2020

Frequent fire incidents on electric bicycles; have brought great harm to consumers’ personal and property safety. This article sort and analyze the data, combine the collected accident reports of electric bicycles. Due to the incompleteness of the data, this article use Bayesian Network to construct the Bayesian network topology model of electric bicycles fire risk, use fuzzy set theory to solve Fuzzy computing the language discussed by experts. Finally, the fuzzy Bayesian theory is used to calculate the example, and the fire risk of the electric bicycle in the example is low. This method provides a reference for the accident investigation and analysis of electric bicycles.
The Model of E-Commerce Going to the Countryside Promoting the Development of Rural Characteristic Economy Based on Big Data Analysis
Authors: Wang Yang , Tu Meng , Cui Jiejie
Published: July 2020

All with the advent of the information economy era, the rapid popularization of the Internet and the large-scale use of commerce, the rapid development and large-scale investment of information technology, and the improvement of the quality of consumers as transaction entities have promoted the comprehensive development of today’s e-commerce. This paper mainly studies the model of e-commerce going to the countryside to promote the development of rural characteristic economy based on big data analysis. This article further investigates the development of a certain rural e-commerce, analyzes the background, experience, practices, difficulties and problems of a certain rural e-commerce in-depth, clarifies the focus and main tasks of a certain rural e-commerce Put forward constructive opinions and suggestions, explore an updated and more suitable road for the development of rural e-commerce, and provide relevant theoretical support and decision-making for the municipal party committee and government to formulate relevant policies, introduce supportive policies, and promote the rapid and healthy development of new urbanization. in accordance with.
Three-dimensional Finite Element Simulation and Experimental Verification of Power Spinning of Magnesium Alloy Cylindrical Parts
Authors: Li Linlin , Yang Zhuojuan , Xu Hengqiu , Zhang Qingfang , Yuan Hengyi , Liu Songqing , Chen Ying
Published: July 2020

Spinning technology is an effective method for forming thin-walled long cylindrical parts. Based on ABAQUS finite element software, this paper analyses the spin forming of magnesium alloy cylindrical parts, and obtains the influence of key parameters such as mandrel speed, feed rate, thinning rate, roller radius and spinning temperature on the spinning process. The spinning test of AZ31 magnesium alloy long cylindrical parts was carried out, and the test results were consistent with the simulation results. Numerical simulation and experimental verification provide the basis for the development of magnesium alloy spinning process.
Innovative Design of Dryer in Utilization and Disposal of Livestock and Poultry Manure
Authors: Bao Zhenbo , Wang Panting , Qin Zhengming , Jia Jianjian , Zhao Xiaoshan
Published: July 2020

With the rapid development of large-scale and intensive livestock and poultry farming, a large number of livestock and poultry manure has been produced. If livestock and poultry manure is directly stacked or improperly disposed of, it will cause extremely serious pollution to the surrounding water, air and soil, and endanger human health. It is an effective method to dispose and utilize livestock and poultry manure properly according to local conditions. However, because of the large water content of livestock and poultry manure, most of the water in the manure needs to be removed before resource disposal. Therefore, drying livestock and poultry manure is a necessary link in the resource disposal and utilization of livestock and poultry manure. In view of the shortcoming of high energy consumption, uneven drying and low drying efficiency existing in the existing drying technology equipment for livestock and poultry manure, on the basis of overall design and working principle analysis of the livestock and poultry manure dryer, innovative designs are made in the following aspects: improving the efficiency of material transportation from the sloping spiral feeding device; at the bottom of the feed box, seepage holes are equipped with, which can preliminarily filter and separate the moisture in livestock and poultry manure; the conveyor belt in the drying oven adopts three-step jump conveyor mode to realize the rolling conveyor drying of livestock and poultry manure. These innovative designs can improve the transportation efficiency, drying uniformity and drying efficiency of livestock and poultry manure, effectively reduce the moisture content in livestock and poultry manure, reduce the energy consumption of dryer, and effectively realize the resource disposal and utilization of livestock and poultry manure.
Research on the Application of Manufacturing Technology for Large-size Bearing Raceway Surface Integrity
Authors: Yu Jikun , Wu Mingyu
Published: July 2020

Various types of standard and non-standard large-size rolling bearings, which function as a rotating force and a main bearing force in the equipment, have continuously improved their performance requirements. This paper proposes surface integrity manufacturing technology for Large-size Bearing Raceway, analyzes the domestic and international overview and development level, research content and key technologies, and the expected indicators and social benefits.
Nonlinear Dynamic Model of Machinery
Authors: He Zhouhong , Liao Xiaowen
Published: July 2020

Rotor dynamics theory is the basis for studying the motion of rotating machinery, and rotating machinery such as water turbines, steam turbines, and aero engines are indispensable core equipment for related industries. However, the current research on rotor dynamics is mostly based on linear conditions, which can no longer meet modern requirements. Engineering requirements, so the study of nonlinear rotor dynamics seems significant. The research purpose of this paper is to study the nonlinear dynamic model. Based on the theory of nonlinear rotor dynamics and the theoretical basis of the finite element method, a finite element simulation method is used to study the nonlinear rotor dynamics. In this paper, the finite element model in the discrete mass model is used. After introducing the research method and eddy theory of nonlinear rotor dynamics, the factors that may cause non-linear interference to the rotor motion in the rotor system are analyzed. The problem was simulated and analyzed, and the movement behavior of the eccentric rotor under elastic support was simulated by means of simulation, and the nonlinear effect of eccentricity on the rotor system was proved.
Lithofacies Types and Quantitative Identification Methods of Reservoirs
Authors: Shi Yanan
Published: July 2020

Taking Xing A Block of Songliao Basin as an example, based on the core data of closed core wells, the sedimentary characteristics and genetic mechanism of its lithofacies are analyzed. It is considered that there are four types of core lithofacies developed in the study area, which are medium fine sandstone facies, siltstone facies, muddy silt facies and mudstone facies. Based on the crossplot recognition technology, the logging quantitative division standard of lithofacies is determined, and the quantitative interpretation chart of lithofacies is established. According to the laboratory analysis and test data, the reservoir quality characteristics of various lithofacies are summarized. The medium fine sandstone facies and siltstone facies are the main reservoirs in the study area with good physical and oil-bearing properties and high oil displacement efficiency; the physical and oil-bearing properties of argillaceous siltstone are poor and the oil displacement efficiency is low; in siltstone and argillaceous siltstone, the degree of water flooding is low and the remaining oil is relatively rich.
Finite Element Simulation of PVC Ecological Wood Composite Wall under Horizontal Load
Authors: Han Fang , Li Jianwen , Dong Zhimin
Published: July 2020

PVC ecological wood is applied to the load-bearing wall structure of building engineering, it is necessary to design the wall structure to meet the bearing capacity requirements. According to the requirement of energy saving, this paper designs the composite wall of low-rise residential application of light steel structure in cold area, and carries on the finite element simulation analysis under the horizontal load, which provides the theoretical basis for the application of PVC ecological wood composite wall.
Finite Element Analysis of Displacement and Vibration Characteristics of Cantilevered Plate
Authors: Li Jiuyang , Li Daozheng , Li Fangqi , Han Fang
Published: July 2020

The cantilever structure will produce a large dynamic response under the vertical load, which will cause the user’s discomfort. Therefore, the vibration characteristics of the structure caused by the vertical load are an important part of the comfort design of the cantilever structure in the normal use limit state. This article takes the vertical displacement of a cantilevered balcony slab on one side of a project under load as an example, and builds a model in the nonlinear finite element software to calculate the structural displacement and the factors of the cantilever length and the tensile reinforcement, and the corresponding comfort evaluation is carried out, which provides a reference for the vibration comfort evaluation of the house cantilever structure.
Man-made Disaster Prevention using Waste Management Hierarchy and Disaster Management Cycle
Authors: Maskuriy R , Selamat A , Ali K N , Maresova P , Krejcar O , Kuca K , Mohd S
Published: July 2020

The amount of construction waste generated is enormous due to the growth of the construction activities, which might lead to serious environmental problems. This is also including the construction waste that was generated from the natural disaster. This potential human-made disaster has been receiving worldwide attention and becomes a significant concern across nations. Thus, many studies on the effectiveness of construction waste management practices have been done. However, statistics do not show any improvement in the number of construction waste production. This paper aims to investigate the state of the art of construction waste management practice in Malaysia and the human-made disaster management strategies that feasible to be applied. Data were collected using the semi-structured interview with the key informants of the construction professional service providers in Malaysia and analyzed through thematic content analysis. An in-depth conceptualization and a new theoretical insight are developed on the strategy to prevent this human-made disaster caused by the construction waste. Findings from the cross-sectional content analysis and cognitive mapping propose a new human-made disaster management strategy in the construction caused by the construction waste that suits to Malaysian context.
Seismic performance of long cable-stayed bridge with various time history loading using finite element method
Authors: Aizon Nabila Huda , Adnan Azlan , Ramli Mohd Zamri , Arjuna Norazah , Alel Asmawisham , Muhammad Yuzir Muhamad Ali
Published: July 2020

Recently, numerous natural disaster events have occurred in various parts of the world. Bridges are one of the most critical structures to be examined to check for defects resulting from disaster events like earthquakes. Therefore, the serviceability of the structure is important to maintain the safety of users. Thus, the main objective of this work is to study the seismic response of a cable-stayed bridge under earthquake time history loading. The cable-stayed bridge components (deck, piers, pylons, and cables) were modelled using finite element modelling in three dimensional (3D). Two types of seismic analysis was implemented in this study; Free Vibration Analysis (FVA) and Nonlinear Time History (NLTH) direct integration analysis to obtain the bridge seismic performance under the earthquake loading. A total of eight earthquake loads in scaled Peak Ground Acceleration (PGA) values of 0.75g, 1.0g, and 1.5g to represent low, moderate and strong earthquake loads, respectively, were used for the analysis. First, eight mode shapes with component directional and period are presented for free vibration analysis. Meanwhile, the NLTH direct integration analysis results reveal the time detection of seismic cable-stayed damage levels under certain peak ground accelerations (PGA). It can be concluded that the long cable-stayed bridge is not safe under several earthquake loads due to different earthquake load profiles. The results are also important to aid further damage assessment of the cable-stayed type of bridge.
The Mediating Effect of Community Leadership on Community Resilience Elements and Community Preparedness
Authors: Ridzuan A A , Kadir M J , Yaacob S , Zainol N A M , Abdullah H , Roslan N H , Wong M M R , Ahmad N D F
Published: July 2020

Disasters can occur in various forms with durations ranging from mere hours to days, weeks, or even months of prolonged damages and losses. Approaches taken to face such situation can build resiliency in a community. Lacking it, important community decisions will be made under the constraints of the crisis or disaster. A community with good disaster preparedness and local leadership engagement will be more capable of responding to, and managing disaster risks, which in turn will reduce damages and losses caused by disasters. This study was conducted to gauge the extent at which community leadership mediates the relationship between community resilience elements (community engagement, community education, and community awareness) and community preparedness. This was done using the results from questionnaires gathered from 318 respondents at Bukit Antarabangsa, Selangor, Malaysia. A structural equation modelling was employed to assess the validity and reliability of the instrument and thus test the research hypotheses. Based on the path model analysis, there are significant correlations to prove that community leadership is a viable partial mediator between community engagement, education and awareness, towards enhancing community preparedness. This also means that the presence of a capable community leader may well be a critical success factor to ensure that the respective community is better prepared and more resilient against disasters.
A Multi-Spatial Assessment Framework To Geological Hazard For High-Rise Building Project In Metro Manila, Philippines
Authors: Almeida MV. , Oreta A W.
Published: July 2020

On Metro Manila Earthquake Impact Reduction Study (MMEIRS) conducted from 2002 to 2004 by Japan International Cooperation Agency (JICA) together with the Philippine Institute for Volcanology and Seismology (PHIVOLCS) and the Metro Manila Development Authority (MMDA), a worst-case scenario with a 7.2 earthquake magnitude in Makati, would have structural impacts on 50% of infrastructures from partial to heavy damage, 18.3% would be heavily damaged, 32.8% would be partially damaged, and major lifelines and utilities that provide electricity, telephones, and water could be cut off. There will be 2,300 casualties, 7,700 injuries, and 156,000 displacements. Geological hazard threatens the City residents and its attractiveness as the preferred residential and business location in the country. In this study, we model the earthquake risk of high-rise building projects in Global City, located at the eastern portion of Makati City near Marikina Valley Fault System. To accomplish this, we identified important geological hazard-related factors and distributed survey question to experts to gather estimation of the importance of each factor, and Monte Carlo Analytic Hierarchy Process (MCAHP) was used to determine the consistency of the expert’s judgment. These factor weights from the MCAHP are applied to the gathered data, and a Quantum GIS software tool was utilized for visualization, producing a geo-hazard map that is color-coded representing weighted-simulation levels of estimated earthquake hazard risks.
Flood Mitigation Measures in Urban Areas of Malaysia Using the Integrated Catchment Modelling Approach
Authors: Shahrulnizam MRM. , Adzim SK. , Kamaruddin SA.
Published: July 2020

Integrated catchment modelling has been used to provide non-structural measures for the mitigation and management of urban flood prone areas. This paper aims to demonstrate a model-based approach through flood mapping that generates multiple simulation results of flood mitigation alternatives for the Sungai Gombak basin. Hydrological and hydraulic analysis, as well as hydrodynamic modelling were carried out using Infoworks Integrated Catchment Modelling (ICM) to evaluate the changes of flood extent caused by different structural components. Rainfall analyses were carried out through the computation of rainfall-runoff and design storms at various return periods and durations. Historical rainfall and stage data were used in the calibration process before the design storm events were fed into the hydrological model. Simulation of the design floods were run under different return periods, storm durations, and land use conditions. The results show that the existing rivers downstream of Sungai Gombak can only provide a flood protection level of 5 to 20-year Average Recurrence Intervals (ARIs). The main cause of frequent flooding can be attributed to the rapid change in catchment land use as development has far exceeded the Kuala Lumpur Structure Plan 2020, and the lack of compliance to the practices recommended in Manual Saliran Mesra Alam (MSMA). The findings suggest that bridge constriction removal is the key solution and that its combination with other flood mitigation works would significantly reduce the flood levels. In conclusion, the study provides useful results and a technical proposal for the authority, and successfully recommends further improvements in flood mapping practices for future studies.
Identification and role of microbial species developed in aerobic granular sludge bioreactor for livestock wastewater treatment
Authors: Othman I , Halim M H Ab , Anuar A N , Rosman N H , Harun H , Noor S M , Ujang Z , Van Loosdrecht M
Published: July 2020

The purpose of the microbial diversity studies conducted is to discover species composition, structure, bacterial distribution, spatial activity as well as the function and role of the microbial. A laboratory-scale sequencing batch reactor with a working volume of 2 L was used to develop aerobic granular sludge to treat livestock wastewater. The seed sludge was taken from municipal wastewater treatment plant, while the wastewater was collected from cattle farm at Primaternak Enterprise, Johor, Malaysia. The composition and diversity of microbial community in the seed sludge and aerobic granules were explored using next generation sequencing analysis. Based on the findings, the details of phylogenetic bacterial which consists of phylum, class, order and family were identified and compared between the seed sludge and aerobic granules. The metagenome DNA sequencing analysis has revealed an abundance of microbial diversity in the seed sludge and 8 hours aerobic granular sludge samples. The metagenome analysis discovered wide variety of microorganism including archaea, bacteria, eukaryote, and virus. Bacteria has been evaluated as the most dominant microbial in both seed sludge and aerobic granules. Acidovorax sp JS42 was found to be the most abundance bacteria species in seed sludge while Thauera MZIT was the most abundance bacteria species in aerobic granules. Whereas, Bacteroides, Flavobacterium, Comamonas, Pseudomonas and Acinetobacter were the most abundance bacteria that responsible in developing aerobic granules were observed to be higher in aerobic granules compared to the seed sludge. The results from this study indicated that distinct differences of microbial community from the seed sludge and aerobic granular sludge were observed clearly, which provided some evidence of the granulation process.