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Sustainable Power and Energy Conference (iSPEC)

作者： Mouhai Liu Wei Zou Maotao Yang Rui Huang Shumin Wei Minqi Yu Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology State Grid Hunan Electric Power Company Changsha China

The load-characteristic charging of EVs and the power of distributed PVs have lately received great attention for car and electric industry due to their energy conservation and environmental friendliness. However, the disordered charging of EVs together with the distributed photovoltaic has made it challenging to meet the energy efficiency and electric quality. In an effort to overcome this challenge, the Monte Carlo method is adopted to calculate the charging load of EVs both in ordered and disordered way and the mathematical model of photovoltaic cell power is established. The reasonable dispatching in EVs and PVs is detailed demonstrated using MATLAB language, with certain day load in the area under the different circumstances. The proposed load characteristic method opens the door to research in the field of EVs and PVs, greatly enhancing the energy-using efficiency and the electric quality.

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Design Verification and Test Techniques for UHF RFID Tag IC

Design Verification and Test Techniques for UHF RFID Tag IC

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Sustainable Power and Energy Conference (iSPEC)

作者： Maotao Yang Shumin Wei Mouhai Liu Rui Huang Minqi Yu Fusheng Chen State Grid Hunan Electric Power Company Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology Changsha China

ISBN: (纸本)9781728149318

Radio Frequency Identification (RFID) technology has been rapidly developed in recent years. Electronic tag constitutes an important part of RFID system. This paper presents the design verification and test techniques suitable for UHF (Ultra High Frequency) RFID passive tag, which can meet the designers' demand for verification and test. Then, the IC baseband circuit test platform based on field programmable gate array is proposed. The platform can be used to verify the function of baseband circuit at design stage. It can also help designers with HDL (Hardware Description Language) code commissioning, so as to improve the reliability of circuit design, which can greatly improve the success rate of tape-out in practical applications. With regard to IC RF parameter test, this paper comes up with a low-cost test technical solution based on the commercially available card reader and the adjustable attenuator, which can be used to accurately measure the RF parameters such as IC sensitivity and input impedance without special RFID equipment, so as to guide the design of antenna and RFID. Based on the above-mentioned test scheme, the UHF RFID Tag IC that has been developed and taped out is tested in this paper.

关键词： UHF RFID tag IC baseband circuit sensitivity input impedance impedance design verification Radio frequency identification Ultrahigh frequencies Integrated circuits Field programmable gate arrays RFID tags Radio Frequency Identification Device Designers CARD READERS RFID system

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Analysis on Influencing Factors of Electricity Sales for Electric Data Security 1

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12th International Symposium on Cyberspace Safety and Security, CSS 2020

作者： He, Hailing Zou, Wei Guo, Qinghong Wu, Wenxian Xiao, Kejiang Changsha410004 China Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology Changsha410004 China Hubei Research Center for Educational Informationization Faculty of Artificial Intelligence in Education Central China Normal University Wuhan430079 China

ISBN: (数字)9783030736712

ISBN: (纸本)9783030736705

Electricity has become one of the most important energy in human social. A reliable analysis of the influencing factors of electricity sales will help strengthen the electricity companies, related national energy departments’ control and security over the expected electricity consumption across the country. In this paper, we analyze the relationship between different types of electricity sales and a variety of potential factors, including immediacy factors, leading factors and the influencing of Chinese New Year by using Pearson correlation coefficient, dynamical time warping. Through the result of experiment, we found that the influencing factors are different for different electricity usage categories. And some factors have lagging effects on electricity sales, so we need to comprehensively consider immediacy factors and leading factors when forecasting electricity sales. At the same time, we also found that Chinese New Year also has a significant impact on electricity sales, thus Chinese New Year is also is also an important factor affecting electricity sales. © 2021, Springer Nature Switzerland AG.

关键词： Sales

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Effect of Shrinkage Reducing Agent and HCSA Expansion Agent on Mechanical Properties and Shrinkage Properties of UHPC

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Cailiao Daobao/Materials Reports 2021年第8期35卷 8042-8048and8063页

作者： Gong, Jianqing Luo, Hongkui Zhang, Yang Gong, Xiao Xie, Zeling Wu, Wuxing Dai, Yuanfan College of Civil Engineering Hunan University Changsha410082 China Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province Hunan University Changsha410082 China Hunan Provincial Expressway Construction and Development Corporation Changsha410000 China

In this paper, we mainly compared the effects of ultra high performance concrete (UHPC) on strength and shrinkage when the shrinkage redu-cing agent and high performance concrete expansion agent (HCSA) were combined and mixed. The results show that the shrinkage reducing agent will delay the hydration of cement and increase the setting time, which is not conducive to the development of early strength of concrete. As the amount (0wt%-2wt%) of shrinkage reducing agent increases, the autogenous shrinkage of UHPC decreases. When the amount of shrin-kage reducing agent is 0.5wt%, the drying shrinkage can be effectively reduced. The HCSA expansion agent will accelerate the UHPC setting time and develop the early strength. HCSA expansion agent can reduce the number of harmful pores inside the concrete and reduce the total porosity, which can reduce the autogenous shrinkage and drying shrinkage of UHPC;When the agent is in excess, sufficient moisture cannot be obtained to participate in the hydration, and there is a risk of damaging the structure. When the shrinkage reducing agent and the HCSA expansion agent are compounded, the compressive strength and flexural strength of the UHPC are greater than those of the single anti-shrinkage agent, and less than the strength when the HCSA expansion agent is directly doped. When the 2wt% shrinkage reducing agent and the 10wt% HCSA expansion agent are compounded, the inhibition of UHPC shrinkage is the best and the mechanical properties of UHPC are high. © 2021, Materials Review Magazine. All right reserved.

关键词： Compressive strength

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The Design of a High Efficient DNA In-Situ Synthesis Apparatus Based on the Principle of Typography Technique

The Design of a High Efficient DNA In-Situ Synthesis Apparat...

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International Conference on BioMedical Engineering and Informatics (BMEI)

作者： Wen Li Jiandi He Pei Jiang Xiaoxi Zeng Jianxin Tang Department of Biomedical Engineering School of Info-physics and Geomatics Engineering Central South University Changsha China Key laboratory of Green packaging and Application of Biological Nanotechnology of Hunan Province Hunan University of Technology Zhuzhou China Key laboratory of Green Packaging and Application of Biological Nanotechnology of Hunan Province Hunan University of Technology Zhuzhou China

ISBN: (纸本)9781424441327

The paper describes a novel machine for in-situ synthesis of DNA Micro-arrays based on the use of typography technique. This apparatus was designed to incorporate platform for imprinting, precision printing stencil, one-way positioning device, manipulator, and liquid & gas delivery part and control part. The programmable logic controller was employed to control operation steps involving in biochip synthesis including locating and imprinting, and delivering the specific liquid. Finally, the control precision of system is measured using three coordinated instrument: the accuracy of location in X, Y axis is 5 mum, accuracy of printing template is 7 mum, and the repeated printing accuracy of whole machine is 16 mum. The result indicates that the design can completely meet the requirement of in situ synthesis of biochip based on the principle of typography printing.

关键词： DNA Printing Programmable control Costs Biomedical engineering Control system synthesis Signal processing Pulse width modulation Sequences Assembly

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In situ characterization of precipitate formation and dissolution in an Al-Zn-Mg-Cu alloy by electrical resistivity measurement

In situ characterization of precipitate formation and dissol...

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International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015

作者： Jiang, Fulin Zurob, Hatem S. Purdy, Gary R. Zhang, Hui College of Materials Science and Engineering Hunan University Changsha410082 China Department of Materials Science and Engineering McMaster University 1280 Main Street West HamiltionONL8S 4L7 Canada Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan University Changsha410082 China

ISBN: (纸本)9780692437360

In situ electrical resistivity measurements were employed to follow precipitation and dissolution processes in an Al-Zn-Mg-Cu alloy under non-isothermal conditions (continuous heating and cooling processes). The initial state of the material (i.e. volume fraction of pre-existing precipitates) was varied in order to highlight the competition between the various precipitation reactions. The precipitate formation and dissolution kinetics could be reliably inferred from the evolution of electrical resistivity. The data indicated that the kinetics of η and T precipitation (and dissolution) is much faster than those of the S phase. The electrical resistivity results were further validated using Differential Scanning Calorimetry.

关键词： Dissolution

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Surface Modification of PHBV Tissue Engineering Nanofibrous Scaffolds with Hyaluronic Acid

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hunan Daxue Xuebao/Journal of hunan University Natural Sciences 2017年第6期44卷 87-95页

作者： Liu, Hairong Huang, Jiying Zhou, Zheng Hu, Yibing Li, Yongsheng Zou, Peng Dai, Yao College of Materials Science and Engineering Hunan University Changsha410082 China College of Biology Hunan University Changsha410082 China Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan University Changsha410082 China Hunan Academy of Chinese Medicine Changsha410013 China

Surface properties of tissue engineering scaffold play important roles in cell adhesion and other biological processes such as cell proliferation, differentiation. In this study, the surface modification of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was performed in order to improve the biological activity of material surface. PHBV nanofibrous scaffold was firstly made by electrostatic spinning method, introducing free amino groups in the PHBV surface through 1, 6-hexanediamine, which provided reaction sites for the further immobilization of hyaluronic acid (HA) macromolecules. The morphology observed by SEM showed that PHBV nanofibrous scaffolds prepared by electrostatic spinning method have smooth surfaces without obvious beads defects and their fiber diameters uniformly distribute. FTIR analysis proved that 1, 6-hexanediamine and hyaluronic acid modified PHBV fibrous scaffolds were successfully achieved. The ninhydrin determination results showed that the surface amine group density, which increased with the extending of aminolysis time, reached its maximum at 50 minutes. Furthermore, there is no significant difference on the morphology of the scaffolds before and after modification by statistic comparison. The water contact angle significantly decreased after the immobilization of hyaluronic acid, indicating that the hydrophilicity was obviously improved after surface modification with the hydrophilic natural biological macromolecules. The Alamar Blue assay manifested that hyaluronic acid modified PHBV nanofibrous scaffolds could significantly promote the chondrocytes proliferation in vitro. Therefore, the hyaluronic acid modified PHBV nanofibrous scaffolds are potential for application in cartilage tissue engineering. © 2017, Editorial Department of Journal of hunan University. All right reserved.

关键词： Biocompatibility

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Scaling behavior of magnitude clusters in aftershock sequence:An example of the Wenchuan Earthquake,China

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Science China Earth Sciences 2012年第3期55卷 507-512页

作者： ZHANG Bin SHI Kai LIU ChunQiong YAO LingKan DI BaoFeng AI NanShan Land and Resources College China West Normal UniversityNanchong 637009China Key Laboratory of Ecotourism's Application Technology of Hunan Province Jishou UniversityJishou 416000China College of Biology and Environmental Sciences Jishou UniversityJishou 416000China Department of Road and Railway Engineering Southwest Jiaotong UniversityChengdu 610031China College of Architecture&Environment Sichuan UniversityChengdu 610065China

The Gutenberg-Richter and Omori Laws, which are generally used to characterize the temporal distribution of aftershock, failed to reflect the statistic properties of climatic outbreak of aftershock energy. Based on a new concept of magnitude clusters describing the fluctuation of aftershock energy release of the Wenchuan Earthquake, we discovered that the pattern of the continuous high-magnitude aftershock follows a power-law rather than a non-Poisson distribution. This suggests that the after-shocks with high magnitudes are statistically clustered. We then divided the aftershock sequences into three sections and demonstrated that though the probability of strong outbreaks decreased with time, there exists a high possibility of the occurrence of isolated high-magnitude aftershocks in the future. Based on self-organized criticality theory, the mechanisms of the power-law pattern of magnitude clusters are discussed. This discovery may be used to guide future aftershock predication and the associated post-disaster reconstruction.

关键词： scaling behavior magnitude clusters aftershock sequence Wenchuan Earthquake

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Online Monitoring Method for Metering Errors in Charging Facilities Based on Energy Conservation and Double Metering Comparison 23

Online Monitoring Method for Metering Errors in Charging Fac...

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Proceedings of the 6th International Conference on Information Technologies and Electrical Engineering

作者： Jing Yang Cong Wu Zhi Wang Chao Liu Mouhai Liu State Grid Hunan Electric Power Corporation Limited China and Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology China

ISBN: (纸本)9798400708299

The electric energy metering device of charging facilities is easily affected by factors such as power quality, abnormal fluctuations in fixed loss in the station area, and distortion signals, and it is difficult to ensure the accuracy of electric energy measurement of charging facilities. In order to ensure the fairness, impartiality, scientific accuracy of measuring charging facilities, and enhance the accuracy of measurement, a hardware and software-based method combining energy conservation and comparison of primary and secondary metering modules is proposed for online monitoring of charging pile errors. Firstly, the measurement errors of each charging pile are calculated based on energy conservation. Secondly, for suspected charging piles with excessive errors, a secondary judgment is conducted using the primary and secondary metering module approach to enhance the robustness of online error monitoring. This method has the advantages of simple structure, low cost, high monitoring efficiency, and accuracy.

关键词： Charging facilities Energy conservation Metering errors Power quality

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The Influence of BCL2 Promoter Polymorphism(-938C>A) on Cervical Cancer Risk and Prognosis in Chinese Women

The Influence of BCL2 Promoter Polymorphism(-938C>A) on Cerv...

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2015 Asia-Pacific Biological Engineering and Biomedical Conference(BEBC 2015)

作者： Pei Jiang Yanchao Liang zhiming Liu Wen Li Xiaoxi Zeng Jianxin Tang Key Laboratory of Green Packaging and Application of Biological Nanotechnology of Hunan Province Hunan University of Technology Department of respiration The Central Hospital of Zhuzhou City

Aims: Expression of the B-cell lymphoma 2(Bcl-2) has been shown to be associated with unfavorable outcome in patients with cervical cancer. However, to our knowledge there is currently no information on the role of the BCL-2-938C/A single nucleotide polymorphism in cervical cancer cases. Therefore, we investigated influence of the BCL-2-938C/A polymorphism on cervical cancer risk and prognosis in Chinese population. Methods: We genotyped BCL-2(-938C>A) polymorphism of peripheral blood DNA from160 cervical cancer patients and 225 healthy controls. Genotyping was confirmed by polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) and direct DNA sequencing. Results: There was no difference in the distribution of BCL-2 genotypes and frequencies of the alleles C(50.9% versus 46.7%) and A(49.1% versus 53.3%) in the cervical cancer patients and controls, respectively, suggesting that genotypes of this polymorphism do not increase the susceptibility to cervical cancer. However, there was a significant association of the BCL-2(-938C>A) polymorphism with Lymph node metastasis in cervical cancer cases. Patients harboring the CC genotype showed a significantly higher risk of lymph node metastasis with OR of 4.327, 95% CI 1.654-11.322. Conclusion: To our knowledge this is the first report documenting that the BCL2(-938C>A) polymorphism as an indicator of a high-risk group within cervical cancer patients with lymph node metastasis.

关键词： HPV The Influence of BCL2 Promoter Polymorphism on Cervical Cancer Risk and Prognosis in Chinese Women

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