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Discrimination of Motor Imagery Patterns by Electroencephalogram Phase Synchronization Combined With Frequency Band Energy

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IEEE/CAA Journal of Automatica Sinica 2017年第3期4卷 551-557页

作者： Chuanwei Liu Yunfa fu jun yang xin Xiong Huiwen Sun Zhengtao Yu Faculty of Information Engineering and Automation Kunming University Science and Technology Shanghai Micro Electronics Equipment Co. Ltd. (SMEE)

Central nerve signal evoked by thoughts can be directly used to control a robot or prosthetic devices without the involvement of the peripheral nerve and *** is a new strategy of human-computer interaction.A method of electroencephalogram(EEG) phase synchronization combined with band energy was proposed to construct a feature vector for pattern recognition of brain-computer interaction based on EEG induced by motor imagery in this paper,rhythm and beta rhythm were first extracted from EEG by band pass filter and then the frequency band energy was calculated by the sliding time window;the instantaneous phase values were obtained using Hilbert transform and then the phase synchronization feature was calculated by the phase locking value(PLV) and the best time interval for extracting the phase synchronization feature was searched by the distribution of the PLV value in the time ***,discrimination of motor imagery patterns was performed by the support vector machine(SVM).The results showed that the phase synchronization feature more effective in4s-7s and the correct classification rate was 91.4%.Compared with the results achieved by a single EEG feature related to motor imagery,the correct classification rate was improved by 3.5 and4.3 percentage points by combining phase synchronization with band *** indicate that the proposed method is effective and it is expected that the study provides a way to improve the performance of the online real-time brain-computer interaction control system based on EEG related to motor imagery.

关键词： Brain-computer interaction(BCI) electroencephalogram(EEG) frequency band energy motor imagery phase synchronization

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Effects of warm ischemia time on biliary injury in rat liver transplantation

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World Journal of Gastroenterology 2012年第43期18卷 6308-6314页

作者： xin-hua Zhu jun-Ping Pan Ya-fu Wu Yi-Tao Ding Department of Hepatobiliary Surgery Affiliated Drum Tower HospitalMedical School of Nanjing UniversityNanjing 210008Jiangsu ProvinceChina

AIM:To investigate the effect of different secondary warm ischemia time (SWIT) on bile duct injury in livertransplanted rats. METHODS:Forty-eight male inbred Sprague-Dawley rats were randomly assigned into four groups:a shamoperation group and three groups with secondary biliary warm ischemia time of 0 min, 10 min and 20 min. A rat model of autologous liver transplantation under ether anesthesia was established, and six rats were killed in each group and blood samples and the median lobe of the liver were collected for assay at 6 h and 24 h after hepatic arterial reperfusion. RESULTS:With prolongation of biliary warm ischemia time, the level of vascular endothelial growth factor-A was significantly decreased, and the value at 24 h was higher than that at 6 h after hepatic arterial reperfusion, but with no significant difference. The extended biliary SWIT led to a significant increase in bile duct epithelial cell apoptosis, and a decrease in the number of blood vessels, the bile duct surrounding the blood vessels and bile duct epithelial cell proliferation in the early postoperative portal area. Pathologic examinations showed that inflammation of the rat portal area was aggravated, and biliary epithelial cell injury was significantly worsened. CONCLUSION:A prolonged biliary warm ischemia time results in aggravated injury of the bile duct and the surrounding vascular plexus in rat autologous orthotopic liver transplantation.

关键词： Bile duct Liver Transplantation Warm ischemia Rat

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Contribution of nearly-zero energy buildings standards enforcement to achieve carbon neutral in urban area by 2060

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Advances in Climate Change Research 2021年第5期12卷 734-743页

作者： ZHANG Shi-Cong yang xin-Yan XU Wei fu Yi-jun China Academy of Building Research Beijing100013China International Science and Technology Cooperation Base for Nearly-Zero Energy Buildings Ministry of Science and TechnologyBeijing100013China Jianke EET Co.Ltd. Beijing100013China

Nearly-zero energy buildings (NZEB) would effectively improve building energy efficiency and promote building electrification. By using a carbon emission model integrated into a bottom-up mid-to-long term energy consumption model, this study analyzes the contribution of NZEB standards to carbon emission targets in the urban area of China by 2060. Three scenarios are set, namely BAU, steady development (S1), and high-speed development (S2). For BAU, the total carbon emissions will reach a peak of 1.94 Gt CO_(2) by 2040. In S1 scenario, total building carbon emissions will reach the peak of 1.72 Gt CO_(2) by 2030. In S2 scenario, the carbon emissions will reach a peak by 2025 with 1.64 Gt CO_(2). Under S1 scenario, which features consistency with NZEB market development and periodic improvement of building energy-efficiency standards, the carbon emission peak in 2030 will be accomplished. To achieve carbon neutrality by 2060, the upgrading of building energy standards to NZEB will contribute 50.1%, while zero-carbon electricity contribution is 49.9%. It is concluded that 2025, 2030, and 2035 could be set as mandatory enforcement years for ultra-low energy buildings, NZEB and zero energy building (ZEB), respectively.

关键词： Ultra-low energy buildings Nearly-zero energy buildings Zero energy buildings Building energy consumption Building carbon emission

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Responsive Hybrid Poly(vinyl alcohol)Hydrogel Membranes with Embedded Microgels as Valves

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Chinese Journal of Polymer Science 2023年第10期41卷 1646-1655页

作者： Zi-Lin Wang Di huang Mei-Yu Zhang xin-xin fu Ying Luo Lei zou Si-Jia Gao Zhuo Zhao Ya-Fei Wang Yan Zhang yong-jun Zhang State Key Laboratory of Separation Membranes and Membrane Processes School of Material Science and EngineeringTiangong UniversityTianjin300387China Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases Institute of Hepatobiliary DiseaseNankai University Affiliated Third Center HospitalTianjin300170China School of Chemistry Tiangong UniversityTianjin300387China

The research and application of responsive materials have long been hampered by their complicated designs and tedious construction ***,many current responsive materials show retard or weak *** this study,responsive hybrid poly(vinyl alcohol)hydrogel membranes with embedded poly(N-isopropylacrylamide-acrylic acid)microgels as valves were constructed by simple mixing and subsequent freezing-thawing *** the structure of the membranes,the matrix poly(vinyl alcohol)chains thread through and entangle with the microgels,and the microgels are firmly constrained within the hybrid hydrogel *** fast and sharp temperature responsiveness of the embedded microgels was largely retained and endowed the hydrogel membrane with excellent temperature and pH ***,the hydrogel membrane showed excellent fatigue resistance in both temperature and pH-responsive flux *** study presented the great potential of these hybrid hydrogel membranes in biomedical applications and provided a new strategy for the future design and construction of responsive biomaterials.

关键词： Poly(vinyl alcohol)hydrogel Microgels Hydrogel membrane

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精轧活套控制系统研究

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浙江大学学报（工学版） 2007年第12期41卷 2052-2057页

作者：邹俊傅新杨华勇浙江大学流体传动及控制国家重点实验室浙江杭州310027

在活套系统中,由于活套高度(套量)和带钢张力是相互耦合的,这种交叉关系严重影响了被控量的调节,采用自抗扰控制器取代张力调节环节中的PI控制器,与传统的PID控制器相比,采用积分变形避免了微分灾,将传统的控制工程经验通过误差的非线... 详细信息

在活套系统中,由于活套高度(套量)和带钢张力是相互耦合的,这种交叉关系严重影响了被控量的调节,采用自抗扰控制器取代张力调节环节中的PI控制器,与传统的PID控制器相比,采用积分变形避免了微分灾,将传统的控制工程经验通过误差的非线性组合方式引入系统,通过误差估计抑制系统外扰.将活套高度对张力的作用作为系统外扰,通过扩张观测器的实时估计,有效的抑制了活套高度波动对张力的影响,获得更加良好的张力控制性能.

关键词：活套系统自抗扰控制张力控制热轧

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Radiation-induced reduction of chromium(VI) in aqueous solution by γ-irradiation in a laboratory-scale

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Journal of Environmental Sciences 2006年第2期18卷 254-258页

作者： YUAN Shou-jun ZHENG Zheng MU Yan-yan YU xin ZHAO yong-fu State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing 210093 China Institute of Atomic Energy Jiangsu Academy of Agricullure Sciences Nanjing 210014 China

Radiation-induced reduction of chromium（Ⅵ）（Cr（Ⅵ） by ,γ-irradiation was studied with an initial concentration of 42 mg/L in aqueous solutions. Several factors which might affect the reduction of Cr（Ⅵ） to Cr（Ⅲ） were examined, pH of aqueous solution affects the reduction efficiency significantly. Acidic condition of aqueous solution accelerates the process. At pH 2, a reduction of 86.2% was achieved with the absorbed dose of 15 kGy, while, with the same dose, at pH 5 and 7, the reduction ofCr （Ⅵ） were only 36.3% and 22.2%, respectively. Ethanol （0.1% in V：V） and sodium carbonate （1 mmol/L） were added into the solution respectively as relatively non-toxic hydroxyl radical scavengers. Reduction rate increased greatly in the presence of ethanol at each pH. Reduction efficiency of Cr（Ⅵ） was enhanced in neutral condition with the addition of sodium carbonate, however, no enhancement was found in acidic condition. The reduction of Cr（Ⅵ） was restrained when the solution was saturated with oxygen; however, the restraint was not significant.

关键词： γ-irradiation radiation-induced reduction of Cr(Ⅵ) hydroxyl radical scavengers kinetics

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Generation maintenance scheduling based on multiple objectives and their relationship analysis

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第11期15卷 1035-1047页

作者： jun-peng ZHAN Chuang-xin GUO Qing-hua WU Lu-liang ZHANG Hong-jun fu College of Electrical Engineering Zhejiang University Department of Electrical Engineering and Electronics University of Liverpool Liverpool L69 3GJ UK School of Electric Power Engineering South China University of Technology Power Dispatch and Control Center Henan Electric Power Company

In a market environment of power systems, each producer pursues its maximal profit while the independent system operator is in charge of the system reliability and the minimization of the total generation cost when generating the generation maintenance scheduling(GMS). Thus, the GMS is inherently a multi-objective optimization problem as its objectives usually conflict with each other. This paper proposes a multi-objective GMS model in a market environment which includes three types of objectives, i.e., each producer's profit, the system reliability, and the total generation cost. The GMS model has been solved by the group search optimizer with multiple producers(GSOMP) on two test systems. The simulation results show that the model is well solved by the GSOMP with a set of evenly distributed Pareto-optimal solutions obtained. The simulation results also illustrate that one producer's profit conflicts with another one's, that the total generation cost does not conflict with the profit of the producer possessing the cheapest units while the total generation cost conflicts with the other producers' profits, and that the reliability objective conflicts with the other objectives.

关键词： Generation maintenance scheduling Market environment Multi-objective optimization

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Fabrication and Evaluation of Porous Keratin/chitosan(KCS) Scaffolds for Effectively Accelerating Wound Healing

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Biomedical and Environmental Sciences 2015年第3期28卷 178-189页

作者： TAN Hong Bo WANG fu You DING Wei ZHANG Ying DING Jing CAI Di xin YU Kai fu yang jun yang Liu XU yong Qing Department of Orthopedics Kunming General Hospital of Chinese People's Liberation Army Center for Joint Surgery Southwest HospitalThe Third Military Medical University Department of Clinical Laboratory Kunming General HospitalChinese People's Liberation Army

Objective To develop a dressing with desired antibacterial activity, good water maintaining ability and mechanical properties for wound healing and skin regeneration. Methods The chitosan with different concentrations were added in keratin solution to form porous keratin/chitosan（KCS） scaffolds. The morphological characteristics, chemical composition, wettability, porosity, swelling ratio and degradation of the scaffolds were evaluated. The antibacterial activity was tested by using S. aureus and E. coli suspension for 2 h. And L929 fibroblast cells culture was used to evaluate the cytotoxicity of the KCS scaffolds. Results The adding of chitosan could increase the hydrophobicity, decrease porosity, swelling ratio and degradation rate of the KCS porous scaffolds. Mechanical properties of KCS scaffolds could be enhanced and well adjusted by chitosan. KCS scaffolds could obviously decrease bacteria number. The proliferation of fibroblast cells in porous KCS patch increased firstly and then decreased with the increase of chitosan concentration. It was appropriate to add 400 μg/m L chitosan to form porous KCS scaffold for achieving best cell attachment and proliferation compared with other samples. Conclusion The porous KCS scaffold may be used as implanted scaffold materials for promoting wound healing and skin regeneration.

关键词： Keratin Chitosan Porous scaffold Wound healing Skin regeneration

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Enhancement of Activity of SnO_(2)-doped In_(2)O_(3)/Al_(2)O_(3) Catalyst for NO Reduction with Propene in the Presence of H_(2)O and SO_(2)

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Chinese Chemical Letters 2005年第11期16卷 1535-1538页

作者： Xiang Yu CUI jun hua LI Ji Ming HAO Li xin fu Department of Environmental Science and Engineering Tsinghua University Beijing 100084

The novel bimetallic Sn-Im/Al2O3 catalysts prepared by three methods for NO reduction by propene were investigated. The results showed that the catalytic activity was enhanced significantly in the presence of H2O on sol-gel catalyst, and the maximum NO conversion increased from 46% to 92%, even in the presence of 100 ppm SO2, NO conversion was still 80%.

关键词： Selective catalytic reduction De-NOx lean burn In2O3/Al2O3 Sn-Ir/A12O3.

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Role of venom and ovarian proteins in immune suppression of Ostrinia furnacalis （Lepidoptera： Pyralidae） larvae parasitized by Macrocentrus cingulum （Hymenoptera： Braconidae）, a polyembryonic parasitoid

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Insect Science 2007年第2期14卷 93-100页

作者： yong LI JIAN-FENG LU CONG-JING FENG xin KE WEN-jun fu Institute of Plant Physiology and Ecology Chinese Academy of Sciences Shanghai School of Bioteclmology and Food Engineering Hefei University of Technology Hefei School of Horticulture and Plant Protection Yangzhou University Yangzhou China

Venom and ovarian proteins in braconid and ichneumonid wasps play an important role in the successful parasitism of their host, especially for immune suppression immediately after oviposition. In this study, we compared the effect of venom and ovarian proteins collected from the female wasps of Macrocentrus cingulum, a polyembryonic parasitoid of the larvae of Ostriniafunacalis, on the encapsulation capacity of Sephadex A- 25 beads at 4 h and 24 h post-injection both in vivo and in vitro. The results showed that the ovarian proteins significantly interfered with the encapsulation capacity of hemocytes in a dose-dependent manner. Spreading and viability of hemocytes in O. furnacalis was not disrupted by venom and ovarian proteins at various concentrations injected. It seems likely that the ovarian proteins from M. cingulum play a role in suppressing the encapsulation capacity of host hemocytes.

关键词： encapsulation Macrocentrus cingulum Ostriniafunacalis ovarian proteins spreading venom

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