長安三階敎寺院與終南山三階敎聖地

李健超 漢陽大學校 民族學硏究所 1994 民族과文化 Vol.2 No.-

Disruption of ecdysis in Leptinotarsa decemlineata by knockdown of chitin deacetylase 1

Jian-Jian Wu,Li-Li Mu,Zhong-Chao Chen,Kai-Yun Fu,Wen-Chao Guo,Chao Li,Guo-Qing Li 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.2

Chitin deacetylases (CDAs) catalyze N-deacetylation of chitin, a crucial process for chitin modification. In the present paper, LdCDA1 was identified in Leptinotarsa decemlineata. It was copiously expressed in larval foregut, hindgut and epidermis. Just before the molt in the first, second and third larval instars, the mRNA levels of LdCDA1 were high. In the fourth (final)-instar larvae, a peak occurred 4 days after ecdysis. In vivo results revealed that LdCDA1 transcriptionally responded, positively and negatively respectively, to 20-hydroxyecdysone and juvenile hormone titers. Moreover, knockdown of LdCDA1 significantly reduced foliage consumption, lengthened developing period and prevented growth in the final instar larvae. Three distinct lethal phenotypes were noted in the LdCDA1 RNAi larvae. About 30% of the RNAi larvae became moribund and finally died; approximately 50% of deformed pupae died as pharate adults; and around 20% of LdCDA1 depleted pupae finally emerged as abnormal adults and eventually died within 1 week after emergence. Furthermore, chitin content was low and the mRNA levels of five chitin biosynthesis transcripts (LdUAP1, LdUAP2, LdChSAa, LdChSAb and LdChSB) were significantly declined in the LdCDA1 RNAi larvae. In addition, glucose, trehalose and glycogen contents were increased in the LdCDA1 depleted hypomorphs, along with highly expressed genes coding for trehalose and glycogen synthesis enzymes. The findings provide a compelling piece of evidence that CDA1 is critical for chitin deposition in L. decemlineata. Moreover, LdCDA1 may be a potential target for control of the larvae.

Protraction of mandibular molars through a severely atrophic edentulous space in a case of juvenile periodontitis

Jian-chao Wu,Yu-ting Zheng,Yi-jun Dai 대한치과교정학회 2020 대한치과교정학회지 Vol.50 No.2

Moving the mandibular posterior teeth into a severely atrophic edentulous space is a challenge. A carefully designed force-and-moment system that results in bodily protraction of the posterior teeth with balanced bone resorption and apposition is needed in such cases. This report describes the treatment of a 19-year-old woman with missing mandibular first molars due to juvenile periodontitis. Miniscrews were used as absolute anchorage during protraction of the mandibular second and third molars. Bodily mesial movement of the mandibular second and third molars was achieved over a distance of 11 to 17 mm after 39 months of orthodontic treatment. [Korean J Orthod 2020;50(2):145-154]

Development of Control Strategy and Energy Management for Plug-in HEV

Chao Ma,Jian Ji(지건),Hyunsoo Kim(김현수) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5

Plug-in Hybrid Electric Vehicle (PHEV) is considered as the next design objective of hybrid electric vehicle (HEV). It combines the advantages of electric vehicle (EV) and HEV. PHEV has full electric drive mode which can be applied in relative short distance and HEV mode which can be used for long distance. In this paper, the powertrain model of the PHEV is obtained. Based on the analysis of the powertrain model, the control strategy and energy management strategy of PHEV are developed. The PHEV simulator is constructed MATLAB/Simulink. Using the powertrain model and the control strategies, simulations are performed and the simulation results are analyzed. Finally, the plug-in Prius simulator is validated by using the PSAT. It is expected that the PHEV performance can be used for the designers to develop a PHEV.

Elongation Prediction of Steel-Strips in Annealing Furnace with Deep Learning via Improved Incremental Extreme Learning Machine

Chao Wang,Jian-Hui Wang,Shu-Sheng Gu,Xiao Wang,Yu-Xian Zhang 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.3

The elongation of steel-strips in annealing furnace is an important factor that affects the position ofwelding line and safety of air-knife since there is no extra space to install welding line detector in field conditions. Therefore, predicting the elongation of steel-strips in the annealing process is important to fulfill the requirementsof eliminating security risks and improving economic performance. In this paper, we propose a deep architecturescalled I-ELM/MLCSA autoencoders with the concept of stacked generalization philosophy to solve large and complexdata mining problems. The comparison results of the case studies indicate that D-ELMs-AE/MLCSA is apromising prediction algorithm and can be employed for steel-strips elongation predictions with excellent performance.

Ag‑doping behavior on (8, 0) single‑walled carbon nanotube with single C‑vacancy or pyridine‑like N3 defect: a DFT study

Chao Yan,Qunfeng Zeng,Jianing Zhu 한국탄소학회 2019 Carbon Letters Vol.29 No.6

Single C-vacancy and pyridine-like N3 defect are usually formed on the single-walled carbon nanotube (SWCNT) and they have unique properties for potential applications. In this paper, we use density functional theory to investigate the discrepancies of such two structures from the geometric and electronic aspects. Our results indicate that the existed single vacancy in the SWCNT can lead to somewhat electron localization because of the lone pair electrons; while the N3 embedded SWCNT ( N3-SWCNT) has stronger chemical reactivity and electron localization than the single vacancy SWCNT (SV-SWCNT) due to the great charge transfer between N3 group and C atom on the tube sidewall. Through the investigation of Ag-doping on the above two nano-structures, we found that the single Ag atom is much more stably adsorbed on the N3- SWCNT sidewall compared with SV-SWCNT, forming higher binding energy and higher electron transfer. Our calculation would shed light on the physicochemical property of SWCNT-based material and thus extend their potential applications in many fields.

An Efficient Indexing Structure for Multidimensional Categorical Range Aggregation Query

( Jian Yang ),( Chongchong Zhao ),( Chao Li ),( Chunxiao Xing ) 한국인터넷정보학회 2019 KSII Transactions on Internet and Information Syst Vol.13 No.2

Categorical range aggregation, which is conceptually equivalent to running a range aggregation query separately on multiple datasets, returns the query result on each dataset. The challenge is when the number of dataset is as large as hundreds or thousands, it takes a lot of computation time and I/O. In previous work, only a single dimension of the range restriction has been solved, and in practice, more applications are being used to calculate multiple range restriction statistics. We proposed MCRI-Tree, an index structure designed to solve multi-dimensional categorical range aggregation queries, which can utilize main memory to maximize the efficiency of CRA queries. Specifically, the MCRI-Tree answers any query in O(nkn-1) I/Os (where n is the number of dimensions, and k denotes the maximum number of pages covered in one dimension among all the n dimensions during a query). The practical efficiency of our technique is demonstrated with extensive experiments.

High-Performance Supercapacitor based on the NaOH Activated D-Glucose Derived Carbon

Chao Wu,Jiang Xu,Jianning Ding,Ningyi Yuan,Pengtao Yan,Ruijun Zhang,Huihan Liu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.7

In this work, a mechanism of catalytic graphitization of D-glucose derived carbon during NaOH activation process is disclosed. The catalytic graphitization is caused by sodium atom, which is produced in the reaction between NaOH and carbon. Due to the combined action of activation and catalytic graphitization resulting from the NaOH, the activated D-glucose derived carbon behaves as a hierarchical micro- and meso-porous structure and has high electrical conductivity. Electrochemical investigations demonstrate that the activated sample exhibits an outstanding rate capability (70% of capacity retention even at a scan rate of 2 V s-1) and high specific capacitance (106 F g-1) in 6 M KOH aqueous electrolyte, which makes it a promising electrode material for high-power supercapacitors.

A Study on Control Algorithm and Energy Management Strategy for GM-Volt Plug-in HEV

Chao Ma,Jian Ji,Woulsun Choi,Hyunsoo Kim 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11

In this paper, a study was performed on the control algorithm and energy management strategy for plug-in HEV. GM-Volt plug-in HEV was selected as the target vehicle, which is capable of driving in Charge depleting (CD) mode with only motor working and Charging sustaining (CS) mode with engine and motor working together. First, powertrain model of GM-Volt was derived. Based on the dynamic model, detailed component control algorithms for CD mode and CS mode were developed. In addition, an energy management strategy was developed from the viewpoint of fuel economy, using the battery state of charge. Drive mode determination algorithm in CD mode was also developed based on the vehicle velocity and wheel torque. Using the dynamic model of and control algorithm for GMVolt plug-in HEV, simulations were performed. Based on the simulation results, an analysis was performed, and it was found that the electric drive range and fuel economy were different with the official values. It was considered due to the transmission loss such as clutch/brake loss and oil pump loss that were not considered in this study.

Fabrication of the porous hydroxyapatite implant by 3D printing

Chao Qian,Jian Sun 한양대학교 세라믹연구소 2013 Journal of Ceramic Processing Research Vol.14 No.4

The feasibility of the preparation of porous hydroxyapatite (HA) implant by three-dimensional printing (3DP) was evaluated in the study. The nanoscale HA powders were blended with a water soluble binder to form the implant. The HA implants were divided into two groups according to the bonding area. The bonding area of group one was reserved to 100% in each layer, while the group two was reserved to 80%. The porous HA implant prototypes were fabricated by 3DP and sintered at 1250 o C. The porous HA implants were chemically stable and well crystallized after the sintering process with no distortion, showing an interconnected porous structure. The 80% HA implants had relatively larger pore size (100-200 µm) than 100% HA implant (50-150 µm). The sintered 100% and 80% HA implants had porosity of 58.58%-68.18% and compressive strength of 84.3-50.9 MPa. The properties of the porous HA implants matched well with bone tissue and exhibited excellent biomechanical compatibility.