bluuebunny/crossref_metadata_2025 huggingface dataset:
The Pressure Control of High Pressure Tubing Together with Problems about Carbon Deposit
Authors: Chen Hongliang
Published: January 2021

In this article, we solve the controlling problems raised by the problem for the part A of the 2019 Chinese University Students Mathematical Modeling Competition—Pressure Control of High Pressure Tubing. Also we have considered the actual problems that may arise, and give a feasible controlling plan. This article is based on fluid mechanics model and micro-element thinking. With the help of software tools such as Excel, Microsoft Visual Studio, and C++ language for programming calculations and simulations, we finally give a feasible solution to stabilizing the pressure in the high-pressure oil pipe, which provides a reference to improve engine efficiency.
Dynamic Analysis of Valve System of Gasoline Engine Based on AVL-Excite
Authors: Guo Huali , Zhang Ruibin
Published: January 2021

There is an important relationship between the valve system and the engine's power, economy, and emissions. If the valve system is designed unreasonable, it will have quite large influence on the engine's charging efficiency, which reduces a decrease in power, insufficient power, and worsen emissions. Therefore, a good valve system can improve engine performance while meeting higher charging efficiency. This paper uses the 3D modeling software UG to establish model of the valve system of a gasoline engine firstly. Then it is established that the valve system kinematics and dynamics simulation model combined with AVL_EXCITE. According to the analysis of the relative movement of the cam profile under the rated power of the gasoline engine, referring to the evaluation index, the deficiency is found and the optimization scheme is proposed.
Model-free Path Following Control of Unmanned Surface Vehicle Based on Adaptive Line-of-sight Guidance
Authors: Niu Guangzhi , Wan Lei
Published: January 2021

A path following control scheme based on virtual transition line-of-sight (LOS) guidance law is proposed for model-free unmanned surface vehicle (USV). In the guidance part, an adaptive LOS circle radius based on the transition layer is designed to improve the convergence speed of USV. Aiming at reducing the overshoot of turning, a small angle transition steering strategy is proposed. In the heading and speed control part, the intelligent adaptive S-plane (IAS) heading controller and intelligent adaptive integral S-plane (IAIS) speed controller with strong robustness are designed respectively. In order to improve the following efficiency, a speed solver based on heading deviation and path point distance is designed. The effectiveness of the guidance strategy and the control algorithms of heading and speed proposed in this paper are verified by the comparative simulations.
Research on Collision Avoidance Path Planning of Double SCARA Robot
Authors: Dang Lifeng , Zhang Liangan , Shi Qin
Published: January 2021

This paper takes double SCARA robot as the research object and uses the computer graphics method to get the collision detection method of two robotic arms at a certain moment. On the basis of collision detection, the C-space method is used to plan the collision avoidance path for the two robots and the two robots considering the end-effector, and the collision avoidance algorithm for the double SCARA robot is obtained. Then, the simulation experiment is carried out to verify the correctness of the algorithm.
Research on calculation of spinning reserve capacity of wind power system considering multiple uncertainties
Authors: Li Zhiyong , Liu Chunxiao
Published: January 2021

With the development of artificial intelligence technology, power system has gradually adopted this technology. In order to better promote the application of artificial intelligence in power system, various algorithms for power system need to be further optimized and improved.After a large-scale wind power grid-connected, its random fluctuation characteristics significantly increase the uncertainty of power system operation. The traditional deterministic reserve capacity determination method has been difficult to meet the needs of the safe and economic operation of the system. It is necessary to comprehensively consider all kinds of uncertain factors that may change the operation state of the system, so as to accurately obtain the rotational reserve demand of the system. Based on this, considering the multiple uncertainties of wind power forecasting error, load forecasting error and conventional outage, this paper proposes a method to determine the reserve capacity of power system including wind power, and deduces the quantitative relationship between upper reserve capacity and loss of load probability (LOLP), lower reserve capacity and wind curtailment probability (WCP). Finally, a case study is given. The research in this paper can be used as the basis of coordinated dispatching and reserve sharing of interconnected power systems.
Internal Combustion Engine Fault Diagnosis Method Based MICEEMD-PWVD
Authors: Mu Weijie , Jiang Haibo
Published: January 2021

As to multi-signals, the figure of time-frequency distribution becomes difficult to understand due to cross-terms in the Wigner-Ville distribution (WVD). At present time, cross-terms suppression of time-frequency analysis is one of the top interests in signal processing, and more and more research had been put on this topic, but the present research on cross-terms suppression exist conflicting problem that these methods couldn’t suppress the cross-terms while holding high time-frequency resolution. A novel method of cross-terms suppression in the WVD based on Complementary Ensemble Empirical Mode Decomposition (CEEMD) was proposed to solve the above problem. Firstly, multi-component signals were decomposed into intrinsic mode functions (IMFs) which were single component signal by CEEMD; Secondly, the Mutual Information values of IMFS and original signal were calculated to judge and delete the CEEMD false components; Thirdly, these Wigner-Ville distributions of true component of IMFs were computed; Finally, WVDs of each single component signal were added linearly to reconstruct the WVD of original signal. Test on synthetic data shows the effectiveness of the proposed method, which can suppress the cross-terms while holding high time-frequency resolution. Apply MICEEMD - PWVD in internal combustion engine valve clearance fault diagnosis, useTD-2DPCA method to extract MICEEMD-PWVD time-frequency image feature, then classify the characteristic parameters with the nearest neighbor classifier. The results show that the IC Engine Fault Diagnosis Method Based MICEEMD-PWVD and TD-2DPCA can accurately diagnose IC engine valve fault.
The research of diagnosing Photovoltaic building fault based on State Grid Distributed Photovoltaic Cloud Platform
Authors: Xie Xiangying , Guo Xingke , Ma Xiaoguang , Cai Shixia , Ai Yufei , Luo Cong , Ge Leyi
Published: January 2021

SGCC invented State Grid Distributed Photovoltaic Cloud Platform (SG-DPCP) in 2018, which is the largest distributed photovoltaic public service cloud platform in China. Based on the power generation data of SG-DPCP, in use of Big Data analysis technology, this paper proposes a method to accurately diagnose the fault types of photovoltaic buildings. The effectiveness of this method is verified by a specific application study.
An Intelligent Pruning Device for Tomato Lateral Branches
Authors: Sun Wei , Cao Shanshan , Qiu Qin , Wu Jianzhai , Xing Liwei , Liu Jifang
Published: January 2021

In order to realize automatic pruning technology of tomato, an intelligent pruning device of tomato lateral branch was designed. A pulley is arranged in the track at the top of the greenhouse tomato planting shed, and a bracket is arranged through a mechanical connection, and a positioning module and a lidar module, a positioning module, a lidar module, a secondary close-range camera and a binocular camera are arranged in the middle section of the crossbar. Through binocular camera to identify and locate the axil part of the leaf, the mechanical arm II fixed the main stem of tomato plant, and judged whether the lateral branch grew in the axil of the leaf through the terminal visual unit, so as to prune or smear the inhibitor to complete the pruning of the tomato lateral branch. This paper effectively solves the efficiency of tomato daily management low and low precision technical problems, which provide a solution for the artificial picking of substitute tomatoes.
Research and Analysis of Step Intelligent Model Predictive Control of Generator Excitation System Based on the Field of Building Installation
Authors: Gou Xiaoping , Zhang Wanjun , Zhang Feng , Zhang Jingxuan , Zhang Jingyi , Zhang Jingyan
Published: January 2021

The traditional hydroelectric unit control system mostly adopts proportional integral derivative (PID) control strategy, which has simple control algorithm structure and is easy to understand and realize by the operation and maintenance personnel of the power station. However, its control objective is single, and the dynamic process and internal state information of the system water machine electricity coupling are less considered, especially the lack of the ability to constrain the system state variables In order to meet the increasingly complex operating environment in the regulation system of hydropower units high-quality control needs. Therefore, a step intelligent model predictive control method for synchronous generator excitation system based on tree algorithm is proposed. The step control and intelligent optimization algorithm are introduced into the rolling optimization of model predictive control, which effectively reduces the dimension of nonlinear programming solution in the rolling optimization and improves the feasibility of the control algorithm. In order to ensure the closed-loop stability of the control system, the concept of "quasi infinite time domain optimization" is introduced into the design process of the model predictive control of the excitation system of synchronous generator. The terminal penalty term and the terminal inequality domain are added in the rolling optimization link, and the "virtual" local linear feedback controller outside the prediction domain is designed. Compared with the traditional excitation control method in single machine and multi machine systems, it is proved that the predictive control method has stronger ability of generator terminal voltage maintenance and electromechanical oscillation damping than the conventional excitation control method.
Research on Real-time Data Acquisition Technology Based on Distribution Automation Technology
Authors: Lu Xin , Gu Yu , Liu Changqing , Ye Qiangbin , Chen Kuiyin
Published: January 2021

The remote terminal equipment data collection system of distribution automation plays a decisive role in the monitoring of distribution networks. The thesis studies the key technologies of distribution network operation and real-time data collection of topology data, analyses various new technologies of ICT, designs the basic technical architecture of real-time data collection, and realizes the automatic connection of various professional data of distribution networks such as equipment, marketing, and scheduling. Into a unified distribution network database that integrates various disciplines, multiple themes, and multiple applications, comprehensively improves the quality of distribution network data, and provides a basis for distribution network diagnosis and big data analysis. At the same time, the paper performs software filtering on the data and uses fast Fourier transform to improve real-time performance. Using a signal generator and a high-precision switching power supply as the signal input, the frequency test, voltage accuracy test and fast Fourier transform experiment were conducted respectively. The experimental results show that the simplified terminal data collection system has higher accuracy and stability.
Research on Monitoring and Diagnosis Technology of Data Anomaly in Distribution Network
Authors: Huang Wensi , Lu Xin , Hu Jiandi , Ye Qiangbin
Published: January 2021

Aiming at the problems of a large amount of abnormal data in the distribution network and the poor adaptability of traditional distribution network data, the paper proposes an intelligent distribution network status and abnormal data monitoring method, which has undergone data pre-processing and data fusion, Data analysis and visualization, and state identification and processing, a total of 4 links, turning multiple electrical feature quantities into a single comprehensive feature quantity, monitoring the operation status of the distribution network, and according to the relationship between each node and the size of the local anomaly factor to achieve intelligence Judgment and location of distribution network fault areas. The thesis realizes the detection and location of faults according to the size of each node's LOF value and the node's association relationship. After RTDS semi-physical closed-loop test, the accuracy and reliability of fault determination and location are high, which has certain reference value.
Simulation Analysis and Experimental Verification of Dynamic and Thermal Stability Characteristics of 500kV High Coupling Split Reactor
Authors: Liu Junxiang , Meng Qingmin , Zhang Xiancong , Luo Junting , Wang Lizhong , Feng Jiaqi
Published: January 2021

This paper introduces the basic principle of 500kV high coupling split reactor, and the simulation analysis of leakage magnetic field, temperature field and winding electromagnetic force of maneuvering thermal stability characteristics. The feasibility of the design scheme is verified by the equivalence test of mechanical strength of small prototype.
Evaluation of Power Quality and Reliability of Distributed Generation in Smart Grid
Authors: Chen Shiyu , Zhang Jian , Wang Lei , Zhang Hongkun , Li Lin
Published: January 2021

With the continuous development of new energy power generation technology, the access capacity of distributed photovoltaics continues to increase, and its impact on the power quality of the distribution network is gradually increasing. The access of distributed power sources brings many problems to the system planning, power quality, and relay protection of the power grid. From the perspective of power quality, this paper analyses the power quality problems caused by the grid-connected distributed power sources and the commonly used improvement methods, and expounds the role of microgrid technology in the hybrid access of multiple distributed power sources to the grid. At the same time, it expounds the technical hotspots of harmonic research on distributed new energy access to the power grid from the aspects of harmonic measurement, harmonic source location and responsibility assessment, harmonic resonance and its instability, and puts forward the future large-scale distributed new. The new harmonic research trend after energy integration provides a theoretical reference for the study of harmonic problems in the distributed new energy grid.
Research and Application of New Business Hierarchical Security Strategies for Power Internet of Things
Authors: Liao Huimin , Li Lili , Cheng Kai
Published: January 2021

In 2019, the State Grid Corporation of China released the power power Internet of things construction outline. The power Internet of things has spawned a large number of new business models. There is an urgent need for more flexible and precise security strategies and protective measures to solve the security problems caused by the complex interaction of new services. This article analyzes the purpose of business classification based on the characteristics of the new business of the power Internet of Things. This article analyzes the purpose of business classification based on the characteristics of the new business of the power Internet of Things. From the perspective of enterprise security, the new business is classified from the perspective of users, devices, data, applications, and combined with the idea of zero trust, so as to achieve accurate protection and access control from all angles of business. Finally, the hierarchical method is applied in the Xiong'an comprehensive energy service and State Grid mall of Hebei Province under the scenario of power Internet of things.
Design and Research of Intelligent Building Control System
Authors: He Yuhan , Du Yan , Guo Hongxia , Yang Jian , Sun Yanling , Wang Zhaojun , Li Congcong , Sun Kai , Zhang Meng , Shi Chunyan , Guo Liying , Gao Qun
Published: January 2021

This paper designs and studies an intelligent building control system. The use of object-oriented design principles to design a building automatic control system is an inevitable product of scientific development, a result of the application of modern scientific and technological achievements, and is based on the development of building fieldbus technology. The advantages of the intelligent building control system include: easy design, easy construction, easy to use, easy to manage, and easy to maintain. Through the design and implementation of intelligent building control systems, energy efficiency can be improved, property management efficiency can be improved, technology application thresholds can be reduced, big data value-added services can be added, and energy control can be fully automated and unattended.
Research on the Integration Technology of Power Engineering Design Materials Based on Fuzzy Retrieval
Authors: Shi Zhuopeng , Sun Tao , Wu Dongxun , Yu Guomei
Published: January 2021

In order to cooperate with State Grid Corporation in its goal of building an ubiquitous power Internet of Things, build a modern smart supply chain, improve equipment procurement quality, supply timeliness and smart operation capabilities, according to the current grid company’s material data diversification, reporting data is easy to miss, and inventory is no longer available Taking advantage of the status quo, the thesis launched an intelligent design material reporting system, which uses data synchronization, data fusion, data interaction and other technologies to achieve a seamless connection between the three-dimensional design and the material system. The system regularly updates the material basic data, automatically extracts accurate material reporting data based on the three-dimensional design results of the power grid project, and at the same time matches inventory information, performs material selection, compiles demand inventory, and pushes it to the material system to realize intelligent material reporting.
Improved Bi-Direction Evolutionary Structural Optimization Method and Its Application
Authors: Zhu Jialei , Liang Xiaodong , Shao Shuai , Bi Yongdong , Miao Runze
Published: January 2021

In the process of lightweight design of structures, the topology optimization method does not depend on the experience of designers, so it can design the optimal products more flexibly and creatively, which has become a hot issue in structural design. However, the current topological optimization results usually have problems such as difficult processing and high cost, which limit their wide application in engineering design. Therefore, this paper is based on the two-way progressive structure optimization method (BESO), considering the existence of jagged edges in the optimization results. In the finite element analysis of the fixed grid method, the boundary element is judged by the sensitivity of the element node, and the boundary element is localized divide and realize the partial deletion of the unit, so as to achieve a smooth boundary of the optimization result. The sensitivity of element nodes during structural flexibility optimization is deduced in detail, its basic principles and specific steps are explained, and finally the feasibility of this method is verified by an example.
Item Recommendation based on Multimedia Variational Autoencoder
Authors: Ran Yu , Chen Ziyu , Mu Yilin
Published: January 2021

At present, with the rapid development of science and technology and the rapid development of computer related technology, with the development of this series of technologies, multimedia communication has rapidly become the means of communication and communication. Digital image technology, a very important form of information representation in multimedia communication, has now become a mainstream way. The technology provides more convenience for people's lives, but also has many problems, such as security, transmission and storage. For example, some images will involve personal privacy, business secrets, and even government secrets. In addition, the rapid transmission of information in limited bandwidth is also very important. Especially in the presence of cloud storage, it can not only store large amounts of information, such as files, videos and images, but also provide a large enough online space to store shared data. In this case, the real-time and security requirements of information transmission are higher and stricter. It is of great theoretical and practical significance to compress the image and reduce the bandwidth and ensure the security of image encryption. Image encryption is also called digital image encryption. Image compression is mainly based on the use of different technologies to change the pixel value and location of the image to protect the image. Image compression mainly compresses the image by removing redundant or unrelated information. In this paper, the concept of the variational self encoder is introduced firstly, and then the image compression and encryption based on the variational self coder generation model are studied and summarized briefly.
The development of intelligent dehydrate device for oil immersed transformer insulation system
Authors: Zhang Ruiliang , Sun Yong , Lv Gang , Tang Huadong , Wang Wei , Xie Zhixun
Published: January 2021

The transformer is the core equipment in the substation. The lifecycle and health of transformer will directly affect the reliability of substation, but the lifecycle of transformer depends on the oil-paper insulation status. Water, oxygen and temperature are the three factors that affect the performance of oil-paper insulation. The most important factor is the water. This paper designed an intelligent and safe dehydrating device based on the molecular sieve adsorption principle which can realize the on-line drying of transformer.
IAPSG: A Novel Intelligent Application Platform for Smart Grid
Authors: Zhou Min , Li Jian , Geng Wei , Yan Tong , Ma Yuan , Cao Xiu
Published: January 2021

As a basic infrastructure, the power grid nowadays plays a vital role in society. The huge network and lots of equipment bring about the complexity of management and maintenance. To solve this problem, an automatic, intelligent, and highly scalable computer system stays to be introduced. Based on the above, we propose a smart application cloud platform for smart grids. According to different needs, they can be integrated into corresponding field applications, such as power consumption anomaly detection, user clustering, and equipment status monitoring. This PaaS platform benefits from our rich IoT sensing devices and information network, which can provide all kinds of device information for high-level applications to achieve complex functions. In order to verify our proposed structure, we use anomaly detection smart applications for verification. Experiments show that our work greatly reduces the difficulty of developing smart applications and improves the management efficiency of smart grids.
Design and Implementation of High Power Pulse Constant Current Source
Authors: Miao Weitong , Huang Jun , Chen Haitao , Wang Yuchen
Published: January 2021

According to the requirement of the semiconductor laser for driving power supply, aiming at the problem of how to produce the current pulse with high amplitude, short pulse width and high stability on the low impedance load, a method of realizing the constant current output of the pulse by using the combination of the buck transform circuit and the linear regulation module is proposed. The Buck circuit is hysteresis controlled to control the storage capacitance voltage, and then the MOSFET working in the linear region is adjusted by the PI module to ensure constant current output on the load. The key factors affecting the output pulse amplitude, pulse width, front and back edge parameters are also analyzed and verified by experiments. The results of 170V DC power supply show that the circuit designed in this paper can output 30A, 250us pulse width and rise time less than 10us pulse constant current output on 5Ω low impedance load.
Construction of on-line monitoring system for self provided power plants in Shandong Power Grid
Authors: Zhu Lingkai , Zhang Haijing , Zheng Wei , Wang Qian , Wang Weishuai , Zhang Yanpeng , Li Honghai , Ren Xinghui
Published: January 2021

Based on the analysis of the problems existing in the operation of self provided power plants in Shandong power grid, it is proposed to develop and build an on-line monitoring system for self-contained power plants, which can realize on-line monitoring of power generation and consumption operation and on-line analysis of power generation and consumption behavior characteristics, realize automatic collection of electricity data, provide scientific and quantitative monitoring means, and promote standardized operation and orderly development of self provided power plants.
Composition and high performance liquid phase analysis of paphia undulate in Marine shellfish
Authors: Zhang Yongli , Xu Song , Chen Xin , Chen Hua , Sun Huili , Xu Feng
Published: January 2021

Study of Marine shellfish ripple and the composition of the clams and HPLC analysis of the ripple, the clam, by high performance liquid technical analysis corrugated and the composition of the clam, the experimental results show that the high performance liquid chromatographic separation of small molecular peptides in the mass spectrogram corresponding molecular weight range of 120-896, mixed small peptide molecular weight below mainly concentrated in the 1000 u, meet the needs of the preparation of small molecular peptides.
Research on Sustainable Development Performance Evaluation of China’s High End Equipment Manufacturing Enterprises
Authors: Liu Fang , Huang Ming , Yang Qing , Wang Yulu
Published: January 2021

Based on the data of Listed Companies in China's high-end equipment manufacturing industry in 2018, this paper uses robust sparse principal component analysis (ROSPCA) method to evaluate the sustainable development performance of enterprises comprehensively. The empirical results show that in the performance evaluation of sustainable development, environmental performance is the most important, followed by business ethics performance, governance performance is the third, the fourth is social performance, and economic performance is the last. According to the conclusion of the empirical study, the paper puts forward some countermeasures, such as strengthening the environmental information disclosure, paying attention to the construction of business ethics corporate culture, improving the diligent governance effect of the board of directors, striving to practice public welfare and bear social responsibility, actively exploring the market and improving the profitability.
Study on the parameters of cleaning water jet for nursing bed hips
Authors: Zhang Huimin , Sun Hongmin
Published: January 2021

In order to study the influence of water jet related parameters in the nursing bed cleaning system on the hip cleaning and comfort of bedridden personnel, combined with the knowledge of ergonomic pressure perception, FLUNET software is used to simulate flow field and analyse impact of nozzle distance to buttock, nozzle diameter, stand-off distance, and jet inclination angle on comfort and cleaning effectiveness of jet stream. When the jet inlet velocity is 3m/s, the stand-off distance is 150mm, the nozzle diameter is 4mm, and the jet tilt angle is 20°, the stand-off distance is 0.0904N, it is within the comfortable pressure range, ranging from 0.0851N∼0.0906N. In addition, the jet stream under above settings has a wider cleaning range and meets the cleaning requirement for people lying on nursing bed.
Summary of Composite Material-Metal Connection Technology
Authors: Dong Jiapeng , Cui Xu , Zhao Pu , Wang Daosheng
Published: January 2021

As high-performance and lightweight materials, such as aluminum alloy and titanium alloy, metals are still used in aerospace and aircraft industry. Therefore, the bonding process of composite materials and metals is one of the key issues to be urgently solved and developed in the aerospace industry. Therefore, the connection technology of CFRP to metal is reviewed in this paper. The implementation process of laser welding, friction welding and resistance welding and the types of connection materials are summarized.
Analysis and Research on Pigment Precipitation of Eggshell Based on Green Environment-friendly Breeding Technology
Authors: Liao Bing , Liu Yinan , Cao Jicheng , Ning Zhonghua
Published: January 2021

The development of poultry farming as a basic industry is driven by this form of development, and agricultural development technology has been greatly improved, which is of great significance for the development of agricultural production. It can be said that in this Under this new form of conditions, people's ideas have also undergone great changes. In the process of agricultural production development, one of the most important influencing factors is to promote the rapid development of poultry farming while also promoting Its stable, healthy and sustainable development. Therefore, it is an important task to achieve green and environmentally friendly farming in the poultry industry and promote the sustainable development of the poultry industry. This article will conduct a series of analyses on how to achieve green and environmentally friendly farming. At the same time, in order to explore the relationship between eggshell colour, composition and structure and eggshell quality, the paper selected 98 normal eggs produced by hens with green environmental protection, and then the quality of the eggshell was measured; then the eggshell colour was determined the instrument measures the colour of the eggshell and explores the deposition rule of the eggshell pigment. Then use the same batch of eggshells to determine the composition of the eggshells, and finally divide them into three groups of strong, medium and weak according to the strength of the eggshells. Take 5 eggshells in each group to observe the microstructure and crystal structure. The study found that the deposition law of eggshell pigments: biliverdin IX and protoporphyrin IX in the eggshell both reached the maximum secretion in the final stage of eggshell formation, and they may be regulated by the same factors. Eggshell colour has a certain relationship with egg weight, eggshell strength, eggshell thickness and Hastelloy unit.
Research on the Main Threat and Prevention Technology of Computer Network Security
Authors: Gao Xiang , Liu Liyuan , Zhu Xuanbing
Published: January 2021

with the arrival of information age, network has become an essential part of people's life, no longer exists as a tool. At the same time, network security has attracted more and more attention. In order to make the network more secure and reliable to play its value, understanding the main threat and its countermeasures of the current computer network is very necessary. This article first makes a brief introduction to the computer network security, introduces the concept, the development present situation and development trend, then expounds the computer network of the main threats, including five aspects such as hackers, spyware, computer virus and so on. Finally discusses the commonly used 5 prevention technologies at present, including firewall technology, antivirus technology, data encryption technology, intrusion detection technology and access control technology. Only by paying attention to network security can we protect our own interests.
Effect of regulating qi and invigorate blood circulation method on hemorrheology in rats with acute blood stasis syndrome and its network pharmacology research
Authors: Mei Ying , Feng Yong , Zi Zhaohui , Pu Xiang
Published: January 2021

To observe the effect of regulating qi and invigorate blood circulation method on hemorrheology in rats with acute blood stasis syndrome from the perspective of modern pharmacology, and use network pharmacology to explain its mechanism. Forty male Wistar rats were randomly divided into 6 groups. Except the blank control group, the other groups were injected with adrenaline hydrochloride and ice bath to establish the acute blood stasis syndrome model. Each group were administered Xuefu Zhuyu D ecoction, Jinlingzi Powder, Taohong Siwu Decoction, and Yanhusuo Decoction, and t he blank control group and model control group were given the same volume of saline, respectively. The blood rheology indexes such as red blood cell aggregation index of rats were measured. The TCMSP and Batman database were used to search for chemical components and targets of Jinlingzi Powder, and protein interaction analysis, GO enrichment analysis and KEGG analysis were performed on the common targets. The experimental results show that, compared with the model group, the blood rheology index levels of the Yanhusuo group and Taohong Siwu Decoction group are reduced, while the blood rheology index levels of the Xuefu Zhuyu Decoction group and the Jinlingzi S an group are significantly reduced. The network pharmacology predicts that Jinlingzi Powder has 44 active ingredients and 34 drug-disease shared targets, and KEGG analyzes 61 signaling pathways. Conclusion: IN the case of blood stasis syndrome, the effect of regulating qi with invigorate blood circulation is better than that of regulating qi alone. Network pharmacologic prediction showed that TNF signaling pathway was strongly correlated with hemorheology, and its action pathway was closely related to key tar gets IL6, TNF, CASP3.
The design of smartcar based on ATMEGA2560
Authors: Liang Xuan , Chen Shiyong
Published: January 2021

With the development of automotive electronics and robot intelligent technology, intelligent vehicle has become a research hotspot in the field of automatic control. Intelligent vehicle control use automatic control, pattern recognition, sensing technology, electronics, electrical, computer, mechanical and other disciplines. Sensor technology is a very important part in the process of intelligent vehicle automatic driving, Infrared alignment tube is a kind of sensor commonly used in navigation. In this paper, it will first introduce the background of smart car, then the design of smart car software and hardware. After that, the code structure will be introduced. Finally, an intelligent car with the functions of navigation, ranging, automatic parking and searching for beacons will be designed.
Research on the Mechanism Model of Carbon Composite Material Damaged by Erosion in the Thermal Field of Single Crystal Silicon Furnace
Authors: Wang Jiajun , Wu Fengzhi , Wu Jianxing , Cai Chouai , Liu Wenyi
Published: January 2021

Aiming at the problem of the short service life of the carbon/carbon pot wall caused by continuous silicification during the pulling process of single crystal silicon, the paper analyzes the failure mode of the carbon/carbon pot wall and analyzes the influence of the pot wall in the single crystal silicon furnace thermal field. The mechanism of erosion damage. It is concluded from the use situation that the carbon/carbon composite crucible can be used in the field of Czochralski single crystal silicon, and its performance is far better than that of the graphite crucible, and the destruction mechanism of the carbon/carbon composite crucible is analyzed, and solutions are proposed. Through the analysis of the entire industry, carbon/carbon composite crucibles will replace graphite crucibles and become the preferred material for the thermal field of Czochralski silicon single crystals in the future.
Adsorption of Heavy Metal ions and Antibiotics from Aqueous Solution on Activated Carbons Prepared from Agricultural Waste
Authors: Deng Wenxin
Published: January 2021

The contamination of water by heavy metal ions and antibiotics is presently a serious environmental challenge of the world. This work intends to use activated carbons made out of agricultural waste to alleviate the problem of water pollution. Commercialized coconut shell activated carbon was used for the experiment. Cadmium ions and chloramphenicol were selected as the model compounds for heavy metal and antibiotics in water solution. TOC analyzer and the atomic absorption spectrophotometry were used to determine the concentration of antibiotics and metal ions in solution, respectively. The coconut shell activated carbon turned out to be efficient in the adsorption of metal ions (removal efficiency up to 90% when concentration is 1mg/L) and chloramphenicol (removal efficiency up to 40% when concentration is 1ml/L). The rates of adsorption of both cadmium ions and chloramphenicol were high at first but declined as the contact time increases. The competitive adsorption was investigated in this study by using a mixed solution of cadmium nitrate and chloramphenicol. It was found that the adsorption capacity of chloramphenicol of activated carbon remains the same while the adsorption capacity of metal ions sharply dropped by 44%, indicating that Cadmium ions have no obvious effect on the adsorption of chloramphenicol, whereas chloramphenicol hinders the adsorption of cadmium ions.
Ultrasonic Nondestructive Testing Method for Mechanical Properties of Metallic Nanomaterials
Authors: Li Jiabing , Zhong Rui , Shen Xingwang , Gao Ziyun , Zhang Junwei , Miao Hansen , Zhang Ziqian
Published: January 2021

For metallic nanomaterials, the small size scale of nanoparticles leads to a significant increase in their surface area, resulting in a series of new mechanical properties. In order to detect the mechanical properties of metal nanomaterials, a new ultrasonic nondestructive testing method is proposed. Using defocusing measurement and time discrimination method, the surface wave velocity of metal nanomaterials at different positions and angles was measured, and the mechanical properties at corresponding positions and angles were obtained. The experimental results show that the new ultrasonic nondestructive testing method can accurately characterize the mechanical properties of metal nanomaterials without causing damage to the tested objects.
Multi-dimensional Park Portrait Model Based On Clustering
Authors: Zhang Linjuan , Xu Changqing , Wang Lili , Li Chenxi
Published: January 2021

With the rapid growth of the social economy, the number of various types of parks in China has increased significantly. Faced with the increasing difficulty of man aging the power consumption of parks, qualitative analysis labels such as industrial parks and technology parks are no longer applicable, and utility companies need to develop differentiated and personalized power supply strategies for parks with different characteristics. Therefore, it is necessary to study the power consumption characteristics of t he park more detailed. A multi-dimensional park portrait model is proposed in this paper. Firstly, based on biclustering algorithm, the user's power consumption data are analyzed. Then the combined forecasting model is stablished to analyze the future power consumption of the park. Besides, an index evaluation system is established to complete the power configuration and demand response analysis of the users’. Finally, K-means cluster analysis is performed on the analysis results to obtain the park portrait.90, 000 pieces of data and related electricity business records from Henan Province are used to verify the effectiveness of the model. The results show that the park portrait obtained by the model and algorithm can quantitatively analyze the relevant attributes of the park.
Effects of Trace Components in Reclaimed Water Sludge on Wet Flue Gas Desulfurization Process
Authors: Liu Zhe , Li Xiaohui , Cai Xiangdong , Guo Yue , Liu Gaojun , Du Lei , Li Qing
Published: January 2021

The paper designed and built a simulation reaction system for the Wet Flue Gas Desulfurization(WFGD) process to analyze the effects of factors on the Oxidation reaction of SO2 for the reuse of reclaimed water sludge. Six trace components including magnesium, iron, chloride, aluminum, PAM and PFS in reclaimed water sludge from reclaimed water softening were selected for analysis factors. The effects of six factors on the oxidation reaction were tested by single factor experiments. The multi-factor effects on the oxidation reaction was studied by adding different proportion of reclaimed water sludge to the desulfurizer of the simulated reaction system. In addition, the effect of reclaimed water sludge on the crystallization and dehydration of desulfurization slurry was analyzed. The results show that six factors have little effects on the SO2 oxidation rate in the test range. The addition of reclaimed water sludge has a significant effect on the crystalline form and dehydration of gypsum.
Analysis of the status quo of green building operation management and countermeasures
Authors: He Weiyi , Zhou Baikun
Published: January 2021

Green buildings are of vital importance to reducing building energy consumption. In recent years, with the support and encouragement of many parties, green buildings have developed rapidly, and the number and scale of green building projects have been continuously expanded, which will undoubtedly become the future development t rend of the construction industry. However, the current level of operation and management of green buildings is low. Poor operation management and maintenance in the later stage have led to low utilization efficiency of various equipment used in green technologies. After a large number of green buildings are put into operation, they have not achieved the expected operating results. This article focuses on green building operation and management The status quo and problems of green building design innovation and the life cycle perspective of green building operation management related development strategies, in order to make up for the "shortcomings" of the expected value of green building public policy, improve the green level of green buildings, to achieve green Operational management makes theoretical contributions.
Study on the Participation of Environmental Protection NPO in Air Pollution Prevention and Control
Authors: Zhu Zhe , Wang Fang , Li Yanan
Published: January 2021

Environmental NPO can effectively make up for the absence of government i n the prevention and control of air pollution, and play an important role in environmental protection rights protection, citizens' awareness of environmental protection, environmental conflict regulation and environmental protection international cooperation. At the same time, there are some problems in the participation of environmental protection NPO in the prevention and control of air pollution. In this study, 36 environmental protection NPOs were selected from East, central and Western China by using probability random sampling method, and analyzed by means of triangulation and in-depth inter views. There were some problems in the current environmental protection NPOs' participation in air pollution prevention and control, such as low professional level, lack of organizational resources, laws and regulation lagged, lack of external supervision and voluntary participation. Therefore, it is necessary to further strengthen the professional capacity building of environmental NPO, improve the laws and regulations system, optimize the internal self-discipline mechanism and external supervision mechanism, and construct the integrity evaluation system and information disclosure system, so as to effectively play the role of environmental NPO in environmental protection, and promote the construction of a community of human destiny to deal with climate change.
Design, fabrication, and testing of biomass pelleting machine for coffee wastes
Authors: Bartolome G J C , De Leon S M C , Polinga C A , Roño J M B
Published: January 2021

A biomass pelletizer was designed and fabricated to produce pellets using coffee husks and spent coffee grounds. The pelletizer works on a principle of a rotating roller pellet mill in which power from the prime mover is transmitted to the rotating spindle at a reduced speed, and causes the roller dies to drift and press the pellet mixture through the thick perforated die plate. An unsharpened knife attached to the spindle facilitates easy detachment of pellets from the die plate upon extrusion and the perforated pellet chute separates the non-pelletized particles and fines from the pellets itself. The performance evaluation of the machine revealed an average pelleting capacity and efficiency of 1.50 kgh−1 and 92.49 percent, respectively, suitable for small-scale pellet production and also a low percentage losses (5%). The physical characteristics of the pellets produced were found to have high uniformity with an average length of 9.86±0.63 mm, diameter of 5.71±0.41 mm, mass per pellet of 0.12 g, moisture content (dry basis) of 16.65 percent, and a bulk density of 850 kg m−3. The researchers recommend that the performance of the pelleting machine be optimized by attaching a feed controller on the hopper and manipulating the speed of the roller dies. Furthermore, it will also be best to analyze the thermochemical properties of the pellets including the proximate and ultimate composition employing standard test methods.
Development of X-in-the-Loop testing system for electric vehicles
Authors: Karpukhin K
Published: January 2021

The paper describes an effort towards development of electric vehicles in the form of an international collaboration aimed to create an environment that combines laboratory facilities and virtual models into a single research and development system called X-in-the-Loop. The facilities included in that system are connected and shared between developers and researchers working in different geographic locations with different vehicle subsystems allowing them to synchronize their experiments in real time studying the entire vehicle rather than its separate components. The main section of the paper focuses on the part of the X-in-the-Loop project dedicated to the thermal management system (TMS) for high voltage components of the considered electric powertrain. In particular, descriptions are given regarding the control principles and the system architecture used to integrate the TMS into the X-in-the-Loop environment. The virtual part of the TMS is verified by means of simulations. Finally, the design of the thermal management system embedded into the test installation is presented in the form of a CAD model.
The natural frequency ratio between Timoshenko and Euler effect by variation of parameter
Authors: Lei Xie
Published: January 2021

Applied energy principle analysis natural frequency equations of Euler beam and Timoshenko respectively. The expression of natural frequency is calculated by the separation of variables. Consider the natural frequency ratio between the Euler beam and Timoshenko one to analyze the relationship between geometric parameters and frequency ratio that effect by parameters of frequency. Calculations show that the relationship between frequency ratio and geometric parameters present non-linear parabola characteristic. When the increment of geometric parameters is identical, the frequency value of the beam was lowered by both transverse shear effect and rotary inertia whereby non-linear characteristics are mainly determined by the transverse shear effect.