DEStech Transactions on Environment, Energy and Earth Science最新文献

{"title":"Technique Review for Differential Drive Crossing Coupling Rectifier in RF Energy Harvester","authors":"Zushuai Xie, Zhiqing Wu, Jianhui Wu","doi":"10.12783/dteees/peems2019/33990","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33990","url":null,"abstract":"This paper presents a comprehensive technique review for CCDD rectifier. It includes the challenges for the design of RF-to-DC rectifier and techniques for the efficiency improvement by controlling the gates and bodies of MOS in CCDD rectifier. The comparison of different techniques for efficiency improvement is concluded. The idea for novel CCDD is discussed and simple simulation result is shown in this paper. Introduction Over the past decades, low power design has attracted massive researches to push integrated system to consume as less as power with proper trade-off between parameters. Many low power and low voltage circuits have been reported [1]. However, it is still challenging to maintain these circuits working more than ten years without battery. Though integration has massively been increased driven by Moore’s law and power consumption has aggressively decreased, battery capability has not kept the pace of industry’s development. This trend has severely constrained the deployment of IoT. As the network of IoT requires massive nodes, about several millions, the battery replacement extremely increases the management cost. Figure 1. Main blocks for RF energy harvesting system. Energy harvesting technology is emerging as an excellent candidate to achieve self-sustainable nodes for IoT applications [2]. It has attracted intensive researches among academics. Although wireless energy among the free space features the minimal energy density due to the transmission loss among the above energy sources, RF energy harvesting attracts the researchers’ interests for its potential feasibility and compatibility with RF transceiver as antenna can both achieve signal receiving/transmitting and energy converting, so no extra energy converter component is required. As shown in Fig. 1, a simplified system blocks for RF energy harvesting constitutes with antenna, RF-to-DC rectifier and Power management unit (PMU). Antenna is used to receive the ambient RF energy in open air. RF-to-DC rectifier achieves to obtain the required DC energy. PMU is used to dynamically control the received energy. And high efficiency of RF-to-DC rectifier plays the most important role in RF energy harvesting system. As shown in Fig. 2, RF-to-DC rectifier can be categorized into two branches: single rectifier (Fig. 2a) and CCDD rectifier (Fig. 2b). This paper only focuses on the efficiency improvement techniques for CCDD rectifier. The rest of this paper is organized as follows. In section 2, the challenge for rectifier design will be stated. In section 3, techniques for high efficiency by controlling the gate and body of differential drive crossing coupling rectifier are reviewed. Finally, section 4 concludes this paper.","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84046468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Shear Failure of Asphalt Pavement under Horizontal Force","authors":"L. Honghui, Liao Xiaojuan, Li Yuan","doi":"10.12783/dteees/peems2019/33970","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33970","url":null,"abstract":"The finite element method is used to analyze the shear stress distribution of the pavement structure under vertical load and both vertical and horizontal load. The results show that the distribution coefficient of transverse force affects the distribution of shear stress with depth; The maximum shear stress increases with the increase of the lateral force coefficient, and the two have a linear relationship. When the horizontal force is considered, the shear stress of the asphalt surface layer increases and the peak value moves upward, which may cause rutting, displacement and swelling of the asphalt pavement. It is necessary to incorporate the horizontal force into the structural design index system. Introduction With the increasing of highway traffic volume and the development of heavy transportation, especially the operation of channelized traffic in high-grade highways, the rutting of asphalt pavement has become the main disease type [1] , and the main type of rutting is the fluidity rutting caused by the shear deformation of asphalt mixture [2,3] . In the summer high temperature season, the shear strength of the asphalt mixture gradually decreases with the increase of temperature. When the shear strength decreases to less than the shear stress, the asphalt mixture will produce shear deformation. Under the repeated action of the load, the wheel track will sag and both sides will rise, forming a W-shaped rut with a cross section. At the same time, displacement and swelling and washboard is also caused by the insufficient shear strength under the action of horizontal load at high temperature. Therefore, it is of great significance to optimize the design of pavement structure and reduce the occurrence of ruts to analyze the mechanics of multibrake sections such as steep road sections and toll stations considering the horizontal force and to explore the distribution law of shear stress. The Selection of Pavement Structure Parameters and the Establishment of Finite Element Model Pavement Structure Parameters Select the commonly used semi-rigid base asphalt pavement structure in China, and the material thickness and parameters are shown in Table 1. Table 1. Calculation parameters of pavement structure. Horizon Material Thicknesscm Modulus of compressive resilienceMPa Poiss0n ratio Above layer Fine grain asphalt concrete 4 1200 0.30 Middle surface layer Medium grain asphalt concrete 6 1000 0.30 Lower layer Coarse grained asphalt concrete 8 800 0.30 Base course Cement stabilized macadam 3","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78253303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Initialization of Electromagnetic Transient Simulation Using Boundary Value Solution Method","authors":"Haowen Yan, Xiaolan Ye, Fang-zong Wang","doi":"10.12783/dteees/peems2019/33983","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33983","url":null,"abstract":"Initialization is an important preliminary work in electromagnetic transient simulation which is typically executed from the periodic steady-state. To this end, researchers have proposed so far a variety of initialization methods, among which the initialization based on fixed-point iteration or the so-called the EMTP-based approach has been widely used. However, this type of method can be very time consuming for a large power system due to its weak convergence. In this paper, the initialization is described as a two-point differential boundary value problem. On this basis, the boundary value solution technique is used to solve this problem, therefore, a new electromagnetic transient initialization method is derived. The proposed method is a strict Newton algorithm, so it has better convergence than the traditional fixed-point iteration method. Case studies conducted on two typical network have confirmed the effectiveness of the proposed method. Introduction The electromagnetic transient simulation and related programs (the EMTP-type programs) are widely used in the electromagnetic transient studies of power systems. The transient behavior of a network can be represented mathematically by ordinary differential equations in the continuous time-domain. Using numerical integration methods such as the implicit trapezoidal rule to solve the ordinary differential equations, the transient solution of the network can be obtained in the discrete time-domain. The transient study of a network normally begins from the network’s steady state. If the system is lightly damped, the time for it to reach its steady state can be significant and the simulation can be prohibitively expensive. The effective initialization for electromagnetic transient simulation or the EMTP-type programs, therefore, becomes unavoidable. Alternatively, the steady state solution for the periodic ordinary differential equations may be of interest in itself for the computer-aided design of nonlinear circuits and harmonic analysis [1]. Some methods to initialize the EMTP-type programs have been proposed [2, 3]. Based on the needs of the EMTP program development, the earliest proposed electromagnetic transient initialization method should be the phasor-solution technique [4]. In this approach all the elements of a network are represented in the phasor-domain. The system solution is obtained at the fundamental system frequency by solving the network matrix equation. The so-obtained system quantities are used to generate the initial state of the network. This solution technique is simple but limited to the linear and lumped-element networks. Another important initialization method is the so-called EMTP-based approach [5]. This approach performs a network’s initialization within the EMTP solution frame. That is, the initial steady state of a network can be directly established for a given initial state by simply integrating the system equations until the response becomes periodic. From a mathem","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"40 160 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83264682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Influence of Solder Void on IGBT Temperature","authors":"Jian Hao, Hao Zhang","doi":"10.12783/dteees/peems2019/33974","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33974","url":null,"abstract":"The void in solder layer is the main factor that causes bad heat dissipation of IGBT (Insulated Gate Bipolar Transistor) module. Based on the seven-layer structure of IGBT, this article established a three-dimensional finite element model of IGBT module packaging structure and carried out its thermal analysis, then had a study on the effect of welding layer void on the temperature of IGBT chip. The overall distribution of IGBT module with or without solder hole is compared, meanwhile the article analyzed the effects of void type, size, shape, number and distribution on the temperature distribution of IGBT chips. The results show that the void in the solder layer of the chip has a great influence on the temperature of the chip. The influence of penetrating voids on chip temperature is greater than that of non-penetrating voids, the bigger the single hole is, the higher the temperature of IGBT chip. Voids of the same shape have greater influence on chip temperature at edge and corner positions than those inside the welding layer. The more concentrated the distribution of multiple holes, the higher the chip’s temperature. Therefore, in order to improve the reliability of IGBT, it is necessary to avoid voids in the chip welding layer during the packaging process.","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87294126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extraction of Sound Signals from Power Cable Impulse Discharge","authors":"Jian Mi, Kun Wang, Qian Liu, Mingxing Zhang","doi":"10.12783/dteees/peems2019/33997","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33997","url":null,"abstract":"In the fault detection of buried power cables, random noise in the shock discharge sound signal is difficult to remove by existing filtering methods. A fifth-order convergent independent component analysis (ICA) method based on empirical mode decomposition (EMD) is proposed to extract the impact discharge sound signal. The fifth-order convergence ICA is adopted, so that the eigenmode components decomposed by the EMD and the remaining signals are independent of each other. Using the strong correlation between the frequency spectrum of the discharge sound signal, the eigenmode component with the largest correlation between the frequency spectrum and the high signal-to-noise ratio shock discharge sound signal spectrum is automatically extracted. Finally, the shock discharge sound signal of unknown failure point is obtained. This method has the advantages of less constraints, small dependencies, and fast convergence. The simulation and experimental results further show that the discharge sound signal in the mixed signal can be effectively extracted. Introduction Buried cables are prone to failure, but the point of failure is not easily detected. If the fault cannot be dealt with in time, it will cause serious consequences. Therefore, it is of great significance to find a fast and accurate method for locating cable faults. At present, many methods are used in cable fault location, including sonic detection method, magnetic sound synchronization method, audio current induction method, etc. [1]. In these methods, the cable discharge sound signal needs to be detected and extracted. The cable discharge sound signal at the fault point of the cable is extremely susceptible to the influence of ambient noise, which makes it difficult to process the signal. The noise in the cable discharge sound signal is non-stationary random noise. Traditional filtering methods, such as the classic spectral analysis of fast Fourier transform, parametric autoregressive moving average spectral analysis [2], Kalman filter [3], etc., are difficult to remove this noise. The empirical mode decomposition method can decompose mixed signals in engineering practice [4]. However, the empirical mode decomposition method will cause aliasing of the eigenmode components of the signal, which is not conducive to the extraction of the signal. Aiming at the problems of signal decomposition by empirical mode decomposition, scholars at home and abroad have proposed many methods [5], but the processing effect is not ideal. A fifth-order convergent ICA method based on EMD is proposed to extract the impact discharge sound signal, and the effectiveness of the method is proved by simulation and field experiments. EMD-based Fifth-order Convergence ICA ICA, which is applied to the extraction of useful sound signals, has achieved good results [6]. However, ICA can be solved only when the number of observation channels is not less than the number of source signals in the mixed signal. In practical applic","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83645885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the Inspection and Management of Certificates in the Process of Professional Title Evaluation by Blockchain Distributed Management Technology","authors":"Yong-Suo Zi, Pengjun Qiu","doi":"10.12783/dteees/peems2019/33956","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33956","url":null,"abstract":"In addition to the rigid indexes of scientific research, papers, teaching materials and monographs, the flexible indexes of teaching, ethics, professional ability and performance contribution are also added in the process of the evaluation of the titles of colleges, enterprises and institutions. Among these flexible indicators, we can only measure and quantify them according to various awards certificates, and how to reasonably quantify and grade various certificates. This brings new requirements and new problems to the evaluation of professional titles. In view of the above-mentioned new requirements and new forms of the existing series of problems, the use of blockchain distributed management technology can well solve the existing problems. Introduction In recent years, a series of new changes have taken place in the evaluation of professional titles of institutions of higher learning, enterprises and institutions. In the original evaluation framework based on papers, scientific research, teaching materials and monographs, many flexible indicators have been added. But the following problems also appear, which increase many elastic indicators, it is difficult to quantify. Basically, they can only be identified by relevant certificates or materials such as award certificates, award projects, qualification certificates, performance materials, etc. However, there are many kinds of unofficial organizations from various academic groups, social organizations and non-governmental organizations. All kinds of unofficial certificates are mixed and hard to distinguish. This brings new problems to the fairness of the evaluation work. To solve this problem is an urgent problem for us to think about and solve. This paper will take the blockchain distributed management technology as the technical core and the certificate authenticity check as the goal, and discuss the technical methods to solve the above problems one by one. Problems Existing in the Verification and Quantification of Certificate Authenticity in the Process of Professional Title Evaluation In the new evaluation method of professional titles, according to the requirements of the new evaluation documents, all kinds of certificates account for a great deal of weight in the evaluation quantification. However, the authenticity of certificate sources and the weight of certificates are two very difficult problems. How to solve these two problems, in the new title evaluation requirements, is the primary problem we cannot avoid at present. On the Verification of Certificate Authenticity in the Process of Professional Title Evaluation How to identify or check the authenticity of certificates in professional title evaluation is the first problem we must solve. If the authenticity of certificates cannot be effectively solved, there will be a serious lack of evidence in the review of evaluation data, which will bring a great test to the subsequent evaluation work and the fairness of evaluation results. The ","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91281317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and Fabrication of Planar Schottky Diode for Electrostatic Discharge Protection","authors":"Chong Shen, Xiu-Lan Cheng","doi":"10.12783/dteees/peems2019/33984","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33984","url":null,"abstract":"A type of easy-to-fabricate Schottky diode with controllable breakdown voltage is design and fabricated. The Schottky junction is formed by the contact of Aluminum electrode and light doped n-type silicon. A special comb teeth structure is designed to lower the resistance and breakdown voltage. The diodes can achieve breakdown voltage between 2V and 16V by optimizing the doping concentration of the substrate and the distance of the comb teeth. The diode has great application potential in electro-static discharge (ESD) protection circuit, due to its easy compatibility in CMOS circuit process and ability of withstanding high currents. Introduction With the development of semiconductor technology, the IC devices are scaling down, achieving higher device density and faster working frequency. However, the damage that comes with electro-static discharge (ESD) are becoming increasingly significant [1,2]. This makes developing ESD protection devices that are compatible with IC fabrication devices a necessity. Many kinds of devices can be used as ESD protection devices, including Zener diode [3,4] and transient voltage suppressor (TVS) [5,6], etc. They are both variants of PN junction diode. Schottky diode is another option for ESD protection [7,8]. Schottky diode uses certain metal materials, such as gold, silver, aluminum and platinum, as anode, and uses n-type semiconductor as cathode. The contact of these materials produces rectification property. Schottky diode has two major differences: magnitude of reverse saturation current and switching characteristic when compared with PN junction diodes, The reverse current density of a Schottky diode can be calculated from equation (1) while that of an ideal PN junction can be calculated from equation (2). JsT = A T exp (− eΦBn kT ) (1) Js = eDnnp0 Ln + eDppn0 Lp (2) In equation (1), e is the charge of an electron, A * is effective Richardson’s constant, φBn is the height of Schottky barrier, k is Boltzmann constant and T is the temperature (Kelvin). In equation (2), Dn and Dp are diffusion coefficient of minority electrons and holes, whose diffusion length is noted as Ln and Lp. np0 and pn0 are minority electron and hole density under heat balance. The transport mechanism of Schottky diode and PN junction diode is different, for the two equations above exhibit different forms. The current in PN junction is mainly determined by the diffusion of minority carrier, whereas that in Schottky junction is mainly determined by thermionic emission of majority carrier. With the same substrate doping concentration, it can be found that the reverse saturation current of Schottky diode is several magnitudes larger than that of PN junction diode. Another major difference between Schottky diode and PN junction diode is their switching speed. As a device whose current is mainly produced by majority carrier, the switching time of Schottky diode is magnitudes smaller than that of PN junction diode, whose current is mainly produ","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81906614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Simulation Modeling Software for Transformer Winding Leakage Magnetic Field Based on C#","authors":"Jianli Zhao, Zheng Kou, Linxi Huang","doi":"10.12783/dteees/peems2019/34019","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/34019","url":null,"abstract":"The simulated calculation model of transformer winding leakage magnetic field is developed based on the development of C# language, and combined with electromagnetic field and transformer theory of this paper. Taking a transformer winding data as an example, the axisymmetric two-dimensional model is established to verify the engineering application effectiveness of the software. Introduction As the continuous expand of the scale of the power grid, the stability requirements for transformer performance are much higher. At the same time, as the capacity of the transformer continues to increase, the loss and thermal and dynamic stability of the transformer are attracted increasingly attention from manufacturers and power grid [1, 2], The premise that the above problems can be analyzed accurately is to accurately analyze the leakage magnetic field of the transformer winding. With the development of numerical calculation, finite element software has sufficient engineering precision to meet the requirements of electromagnetic field calculation [3], but in the general numerical calculation, the calculating model established can only be used to analyze specific physical problems, and its calculating model cannot be applied to analyze other issues [4]. Therefore, in-depth study of the types of transformer windings, how to automatically establish a method to accurately describe various winding models through simple input has become an urgent research topic. Mao Fengchun et al. recommended the model modeled by pie (line) by comparing the geometric models of windings with different fineness levels [5]. However, for large-scale power transformer, the windings contain various structural forms and structures is complex, which require high technical capabilities and experience of analysts. And the manual modeling method is much time consuming. Therefore, the large-scale power transformer winding modeling software which could apply to design, analyze and verify actual transformers is necessary to be developed. The winding is the core component of the transformer, and its variety is various. It is a top priority to construct the model to reasonably establish the winding conductor model to realize the analysis of the distribution of the winding leakage magnetic field. Based on the theory of transformer leakage magnetic field analysis, the calculation and modeling methods of magnetic flux leakage in transformer windings is discussed in this paper. The object-oriented analysis and design software is adopted, the class required for winding modeling is reasonably abstracted. According to various windings, the winding model in which the conductor ring is as the base and the layer unit is as the core are proposed. The C# language is used as a tool to develop simulation modeling software for transformer winding leakage magnetic field. The coil model for different structural forms of the transformer is established quickly and easily via the analysis software, and the outpu","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85452284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-dimensional Anti-counterfeiting Anomaly Monitoring Model Based on RFID in Supply Chain","authors":"Mengjie Luo, Xiao-ming Yao, Chaoyu Li","doi":"10.12783/dteees/peems2019/33992","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33992","url":null,"abstract":"There are two kinds of abnormal conditions in the RFID-enabled supply chain such as forgery and miss operation, but the existing anti-counterfeiting model is not used to distinguish them. In this regard, based on the definition of abnormal activity and its dependencies, this paper proposes the abnormality detection rules of the “frequent pattern” yielded by big data techniques. From a multi-dimensional perspective, combined with EPC data and prior information sent from the previous nodes, it can effectively distinguish between forgery activities and operational anomalies. Consequently, asecure visualization system for anti-counterfeiting and anomaly monitoring in rfid-enabled supply chain is implemented with satisfactory results","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83958492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the Technical Improvement of Traditional Handmade Paper in Guangdong, China","authors":"Zhibiao Mai, Z. Zhong, W. Luo, Xiao-peng Peng","doi":"10.12783/dteees/peems2019/33938","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33938","url":null,"abstract":"In order to make the traditional handmade paper in Guangdong more suitable for modern application, this article tryed to improve the manufacturing technology by some practical experiments. In these experiments, the mechanical properties and surface effects of the paper was improved by compositing material, sizing surface, adding texture, embossing and polishing. These experiments show that the handmade paper has good processing adaptability, it can apply many manufacturing processes flexibly, and can get a lot of effect with beautiful form and good performance. All of these technologies can provide a good material basis for modern application and cultural inheritance, which can be used in many paper mills and folk cultural institutions widely. Introduction Paper is a flat and even sheet made by depositing plant fiber, mineral fiber, animal fiber, chemical fiber or mixtures of these fibers. They are made by drying with suitable forming equipment [1]. It can be seen from the above that as long as the handmade paper does not break away from the process of fiber flaking, it still belongs to the category of papermaking. Therefore, we can make many kinds of paper for different aesthetic characteristics and meet the needs of modern creative design by adding materials and changing part of the process. Of course, we should implement it on the premise of preserving the historical flavor and technological essence of handmade paper. This can give more new functions and roles to Chinese traditional handmade paper, which is of great significance. There are two aspects to change the process of traditional handmade paper: one is to improve the existing process; the other is to add the follow-up process. The advanced technology of modern mechanical paper is interspersed in the process of manual paper making to improve the quality of handmade paper, so as to realize the activation and protection goals of traditional handmade paper from remote mountains to cities and from ancient times to modern times. Adding Composite Materials in Papermaking Using natural materials is the characteristic advantage of traditional handmade paper, it also brings the disadvantage of blank appearance. If put other pulp into the raw materials, such as wood pulp, cotton pulp, straw pulp and fluorescent powder, to reconcile the appearance of traditional manual paper. It will get a special effect [2]. In the first experiment, we add straw pulp and Broussonetia bark pulp into bamboo pulp. The mixing of these pulp will deepen the paper color, let the color become dark. The effect of straw pulp on the paper texture is not obvious, but if the rough bark is added, in addition to the deepening of the color of the paper, the lines of the bark will also make the paper present an abstract texture, making the appearance of the paper more special. After many tests, when the ratio of each size is as shown in Table 1, the paper can achieve a good balance between appearance and texture. Another way to m","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"25 6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80824121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}