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Fault Diagnosis based on Grey-box Neural Network Identification Model
Cen Zhaohui,Wei Jiaolong,Jiang Rui 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
This paper presents a fault diagnosis (FD) scheme for a class of nonlinear dynamic systems using a novel Grey-Box Neural Network Model (GBNNM). In this GBNNM, a composite structure, including MLP (multi-layer perception) NN (Neural Network) and integer term, is proposed to approximate both nonlinearity and dynamics of object system. Its approximation ability is then proved theoretically. And a self-defined exciting strategy is introduced into NN training to improve NN"s generalization ability. Unlike previous NN model based fault diagnosis methods, a quantitative residual, which is obtained from system output and its GBNNM model output, can accurately indicates inconsistency caused by fault, so the improved residual is not essential for our scheme. The proposed FD scheme is applied in a high-fidelity Reaction Wheel (RW) in Satellite Attitude Control System (SACS) in our case study. The results of the case study demonstrate the effectiveness and superiority of our FD scheme.
Kou, Xiaohong,Jiang, Bianling,Zhang, Ying,Wang, Jun,Xue, Zhaohui Korean Society of Horticultural Science 2016 원예과학기술지 Vol.34 No.6
Sugars play many important roles in plant metabolism and directly influence fruit quality. The effects of two edible coatings, 2% calcium chloride and 1% pullulan, on sugar metabolism in postharvest Huangguan pear fruit were investigated during cold storage. The respiration rate, sugar content and composition, sucrose metabolism enzyme activities [acid invertase (AIV), neutral invertase (NI), sucrose synthase (SS), and sucrose phosphate synthase (SPS)] and expression of the AIV gene were analyzed during storage at $0^{\circ}C$ for 210 days. Coating treatments slowed the decrease of sucrose and hexose, the respiration rate, and the activities of AIV, NI, SS and SPS, thus maintaining high total soluble solids (TSS) and titratable acid (TA) contents in the fruit. There were no significant differences in AIV expression or activity between the treated and control groups of fruits. Both of the coatings could inhibit the activities of sucrose-cleaving enzymes, thus slowing the decrease of sugar content and maintaining high fruit quality during cold storage.
Optimization of acridine orange loading on 1:1 layered clay minerals for fluorescence enhancement
Wei-Teh Jiang,Yolin Tsai,Xisen Wang,Zhaohui Li 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.90 No.-
As a cationic fluorescence dye acridine orange (AO) is commonly used in biology and biochemistry for DNA analyses. In this study the light absorption and fluorescence of AO after being sorbed on kaolinite (Kao) and halloysite (Hal) were investigated. In dilute systems with initial AO concentrations of 1 × 106 to 1 ×104 M (0.3–25mmol/g loadings on Kao), both light absorption and fluorescence emission increased as the initial AO concentrations, thus, the amounts of AO sorbed increased. In contrast, the light absorption and fluorescence emission reached maxima at 1 × 105 M (3mmol/g) for Hal. In concentrated systems with initial AO concentrations of 5 × 104 –5 ×103 M (22–57 and 50–126mmol/g AO sorption on Kao and Hal), significant fluorescence quenching was observed and the fluorescence intensity decreased as the initial AO concentrations, thus, the amounts of AO sorbed increased. The results suggested that to achieve maximal fluorescence emission, monomeric AO configuration on the solid surface is a necessity. The AO sorption was mostly attributed to cation exchange between protonated AO and exchangeable cations on Kao and Hal surfaces. As such, both cation exchange capacity and specific surface area of the minerals control the maximal fluorescence emission.
Xiaohong Kou,Bianling Jiang,Ying Zhang,Jun Wang,Zhaohui Xue 한국원예학회 2016 원예과학기술지 Vol.34 No.6
Sugars play many important roles in plant metabolism and directly influence fruit quality. The effects of two edible coatings, 2% calcium chloride and 1% pullulan, on sugar metabolism in postharvest Huangguan pear fruit were investigated during cold storage. The respiration rate, sugar content and composition, sucrose metabolism enzyme activities [acid invertase (AIV), neutral invertase (NI), sucrose synthase (SS), and sucrose phosphate synthase (SPS)] and expression of the AIV gene were analyzed during storage at 0℃ for 210 days. Coating treatments slowed the decrease of sucrose and hexose, the respiration rate, and the activities of AIV, NI, SS and SPS, thus maintaining high total soluble solids (TSS) and titratable acid (TA) contents in the fruit. There were no significant differences in AIV expression or activity between the treated and control groups of fruits. Both of the coatings could inhibit the activities of sucrose-cleaving enzymes, thus slowing the decrease of sugar content and maintaining high fruit quality during cold storage.
Qicai Wang,Yuan Tao,Jie Yuan,Zhaohui Jiang,Zuowei Ding,Zhongwei Zhang,Zhao Jia,Jing Wang 한국섬유공학회 2019 Fibers and polymers Vol.20 No.4
Different sensations are generated when we touch textiles with different performance. The mechanical propertiesrelated to fabric touch have been studied for a long time, the relationship between which and the subjective feelings is wellunderstood. However, the cognitive mechanism of our brain on the tactile perception evoked by fabric touch were rarelystudied. The relationship between mechanical properties of fabrics and the brain response in different areas is the vacancy ofthe study but urgent problem. In our previous study, the advanced technology of fMRI was proved to be an effective tool fordetecting brain response evoked by tactile stimulation of fabric touch with high spatial resolution. Now in this study, furtherfMRI experiments were conducted to observe brain response when participants touched different fabrics using their fingers ina specified way, and the most widely recognized functional atlas, Brodmann’s area maps, were applied to locate the corticalactivations in functional areas. Activations in the participants’s brain in different Brodmann areas was compared with themechanical preperties of the fabric samples tested by the instruments of KES-FB. The results showed that activationinformation in the participants’ brain can distinguish the fabric samples very well. Activations in several Brodmann areas areclosely connected with different tactile preperties of the fabrics. Therefore, Brodmann’s area maps were proved to be a usefulfunctional atlas for cortical localization of tactile perception evoked by fabric touch.
Min Guo,Zhihui Li,Yandong Lei,Yonggui Li,Yuan Huang,Zengge Guo,Zhaohui Jiang 한국섬유공학회 2023 Fibers and polymers Vol.24 No.12
To prepare wearable heated fabric with effective photothermal conversion property for human thermotherapy, silver (Ag) and gold nanoparticles (Au NPs) with thermoplasmonic effect were hierarchically deposited on the cellulose fabric through spray-assisted self-assembly technique, and thus fabricated Ag/Au NPs composite-coated fabric with compactly arranged nanostructures. The surface morphology of Ag/Au NPs-coated fabric was observed by scanning electron microscope (SEM), the light absorption ability was characterized through ultraviolet-visible-near infrared (UV-Vis-NIR) spectra and the correspondingly calculated optical absorbed power, and the photothermal effect was monitored by photothermal conversion test under simulated and natural solar irradiation, respectively. The results showed that the different-sized Ag and Au NPs were distributed randomly on the surface of cellulose fibers, and the small Au NPs were deposited densely in the gaps between large-sized Ag NPs. The composite-coated fabric exhibited the characteristic plasmonic peaks from Ag and Au NPs and enhanced the spectral absorption ability in the UV-Vis-NIR wavelength range, and the surface temperature of the composite-coated fabric reached ~ 48 °C under solar irradiation of 1 kW m-2, and thus improved photothermal conversion performance with ΔT ~ 20 °C compared with pristine fabric. Furthermore, the composite coatings deposited on fabric displayed favorable photothermal stability under cyclic utilization and washing treatment, as wells as the good thermochromic performance for temperature indication. The exploration of the composite-coated fabric with photothermal effect provides a feasible strategy for wearable thermotherapy application.
Zhaoyi Li,Liang Sun,Zhongjun Fu,Yuchao Li,Zhaohui Jiang,Bingtao Tang,Quan Ji,Yanzhi Xia,Ming Wang,Haofei Huang 한국섬유공학회 2021 Fibers and polymers Vol.22 No.3
Calcium alginate fiber is a biomaterial with promising application in textile industry. However, the poor dyeingproperty of this fiber restricts its development. In this study, three PVAm (polyvinylamine) dyes were applied to the exhaustdyeing of calcium alginate fiber and their dyeing behavior under different dyeing conditions was studied. The dyeing resultsrevealed that PVAm dyes were firmly adsorbed on calcium alginate fiber by coordination bonding formed between theprimary amino groups in PVAm backbones of dyes and Ca2+ ions in calcium alginate fiber. This special complex dyeingmode was further confirmed by a Langmuir-type adsorption manner of PVAm-1 dye for calcium alginate fiber. By theformation of this stable chelation structure between dyes and fibers, high exhaustion rates (88.9-97.1 %) and excellent colorfastness were obtained. SEM and XRD results also showed that the surface and crystal phase of dyed fibers had very slightchanges compared to those of original calcium alginate fibers. The strength property of the fiber was also maintained wellafter this special complex dyeing process.
Meng, Dong,Sun, Dan,Zhong, Chengmei,Liu, Tao,Fan, Bingbing,Huo, Lijun,Li, Yan,Jiang, Wei,Choi, Hyosung,Kim, Taehyo,Kim, Jin Young,Sun, Yanming,Wang, Zhaohui,Heeger, Alan J. American Chemical Society 2016 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.138 No.1
<P>Non-fullerene acceptors have recently attracted tremendous interest because of their potential as alternatives to fullerene derivatives in bulk heterojunction organic solar cells. However, the power conversion efficiencies (PCEs) have lagged far behind those of the polymer/fullerene system, mainly because of the low fill factor (FF) and photocurrent. Here we report a novel perylene bisimide (PBI) acceptor, SdiPBI-Se, in which selenium atoms were introduced into the perylene core. With a well-established wide-band-gap polymer (PDBT-T1) as the donor, a high efficiency of 8.4% with an unprecedented high FF of 70.2% is achieved for solution-processed non-fullerene organic solar cells. Efficient photon absorption, high and balanced charge carrier mobility, and ultrafast charge generation processes in PDBT-T1:SdiPBI-Se films account for the high photovoltaic performance. Our results suggest that non-fullerene acceptors have enormous potential to rival or even surpass the performance of their fullerene counterparts.</P>