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Research on Wood Cell Shape Analysis Methods based on Fourier Descriptors
Lei Zhao,Jian Hua Wang 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.2
The shape parameter of wood microscopic cell is one of the important parameters in the identification of wood species. Fourier Descriptors is often used to describe the boundaries of closed areas. The paper analyzes the slice images of five kinds of common wood cells, extracting the mathematical parameters of the cells, obtaining the average value and simulating the benchmark cell shape of the five wood species to provide data support for subsequent recognition experiments.
Jian-Lei Cao,Jia-Meng Yin,Ji-Sun Shin,Hee-Hyol Lee 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
PID control systems are widely used in many fields, and many methods to tune parameters of PID controller are known. When the characteristics of the object are changed, the traditional PID control should be adjusted by empirical knowledge. It may bring a worse performance to the system. In this paper, a new method to tune PID parameters called as the modified back propagate network by particle swarm optimization is proposed. This algorithm combines the conventional PID control with the back propagate neural network (BPNN) and the particle swarm optimization (PSO). This method is demonstrated in the engine idle-speed control problem, and the proposed method provides prominent performance benefits over the traditional controller in this simulation.
Jian Son,Hong-Li Wang,Ke-Han Song,Zhi-Wen Ding,Hai-Lian Wang,Xiao-Sheng Ma,Fei-Zhou Lu,Xin-Lei Xia,Ying-Wei Wang,Fei-Zou,Jian-Yuan Jiang 생화학분자생물학회 2018 Experimental and molecular medicine Vol.50 No.-
This study was carried out to explore the roles of circular RNAs (circRNAs) in nucleus pulposus (NP) tissues in intervertebral disc degeneration (IDD). Differentially expressed circRNAs in IDD and normal NP tissues were identified based on the results of microarray analysis. Bioinformatics techniques were employed to predict the direct interactions of selected circRNAs, microRNAs (miR), and mRNAs. CircRNA_104670 was selected as the target circRNA due to its large multiplier expression in IDD tissues. After luciferase reporter and EGFP/RFP reporter assays, we confirmed that circRNA_104670 directly bound to miR-17-3p, while MMP-2 was the direct target of miR-17-3p. The receiver-operating characteristic (ROC) curve showed that circRNA_104670 and miR-17-3p had good diagnostic significance for IDD (AUC circRNA_104670 = 0.96; AUC miRNA-17-3p = 0.91). A significant correlation was detected between the Pfirrmann grade and expression of circRNA_104670 (r = 0.63; p = 0.00) and miR-17-3p (r = −0.62; p = 0.00). Flow-cytometric analysis and the MTT assay showed that interfering with circRNA_104670 using small interfering RNA (siRNA) inhibited NP cell apoptosis (p < 0.01), and this inhibition was reduced by interfering with miR-17-3p. Interfering with circRNA_104670 suppressed MMP-2 expression and increased extracellular matrix (ECM) formation, which were also reduced by interfering with miR-17-3p. Finally, an MRI evaluation showed that circRNA_104670 inhibition mice had a lower IDD grade compared with control mice (p < 0.01), whereas circRNA_104670 and miRNA-17-3p inhibition mice had a higher IDD grade compared with circRNA_104670 inhibition mice (p < 0.05). CircRNA_104670 is highly expressed in the NP tissues of IDD and acts as a ceRNA during NP degradation.
Reliable Data Transmission Based on Erasure-resilient Code in Wireless Sensor Networks
( Jian-jun Lei ),( Gu-in Kwon ) 한국인터넷정보학회 2010 KSII Transactions on Internet and Information Syst Vol.4 No.1
Emerging applications with high data rates will need to transport bulk data reliably in wireless sensor networks. ARQ (Automatic Repeat request) or Forward Error Correction (FEC) code schemes can be used to provide reliable transmission in a sensor network. However, the naive ARQ approach drops the whole frame, even though there is a bit error in the frame and the FEC at the bit level scheme may require a highly complex method to adjust the amount of FEC redundancy. We propose a bulk data transmission scheme based on erasure-resilient code in this paper to overcome these inefficiencies. The sender fragments bulk data into many small blocks, encodes the blocks with LT codes and packages several such blocks into a frame. The receiver only drops the corrupted blocks (compared to the entire frame) and the original data can be reconstructed if sufficient error-free blocks are received. An incidental benefit is that the frame error rate (FER) becomes irrelevant to frame size (error recovery). A frame can therefore be sufficiently large to provide high utilization of the wireless channel bandwidth without sacrificing the effectiveness of error recovery. The scheme has been implemented as a new data link layer in TinyOS, and evaluated through experiments in a testbed of Zigbex motes. Results show single hop transmission throughput can be improved by at least 20% under typical wireless channel conditions. It also reduces the transmission time of a reasonable range of size files by more than 30%, compared to a frame ARQ scheme. The total number of bytes sent by all nodes in the multi-hop communication is reduced by more than 60% compared to the frame ARQ scheme.
Lei, Xin Jian,Bae, Jun,Lee, Ju,Lee, Sang,Kim, In Agricultural Research Communication Center 2017 Indian journal of animal research Vol.51 No.-
<P>The objective of the study was to evaluate the effects of expanded diets on growth performance, meat quality, and carcass characteristics in finishing pigs. A total of 80 finishing pigs [(Landrace × Yorkshire) × Duroc] were randomly allotted to two dietary treatments: 1) unexpanded corn-soybean meal diets; 2) expanded corn-soybean meal diets. Each treatment consisted of ten replicate pens with four pigs (2 gilts and 2 barrows) per pen. There were no differences in daily feed intake and daily gain throughout the experiment (P less than 0.05). However, expanded diets decreased feed conversion ratio compared with unexpanded diets (P less than 0.05). Expanded diets had no effect on carcass characteristics and meat quality with the exception of increased sensory evaluation (color) of meat compared with unexpanded diets (P less than 0.05). In conclusion, expanded diets can improve feed conversion ratio but have no effect on daily gain and daily feed intake and sensory evaluation of meat color.</P>
Lei, Xin Jian,Kim, In Ho Elsevier 2018 Animal feed science and technology Vol.245 No.-
<P><B>Abstract</B></P> <P>This study was conducted to evaluate the effects of coated zinc oxide on growth performance, nutrient digestibility, fecal scores, minerals concentrations in serum, fecal zinc, intestinal morphology, and selected microbial population in weaned pigs. A total of 192 crossbred [(Yorkshire × Landrace) × Duroc] weaned pigs (7.42 ± 0.97 kg) were randomly assigned into one of the following dietary treatments: (1) negative control (NC): basal diet; (2) positive control (PC): NC + 2500 mg/kg conventional zinc oxide; (3) CZO300: NC + 300 mg/kg coated zinc oxide; (4) CZO500: NC + 500 mg/kg coated zinc oxide; (5) CZO1000: NC + 1000 mg/kg coated zinc oxide; (6) CZO2000: NC + 2000 mg/kg coated zinc oxide. Each treatment had 8 replicate pens, with 4 pigs per pen. Pigs fed PC, CZO500, CZO1000, and CZO2000 diets had higher (<I>P</I> < 0.01) average daily gain (ADG) than those fed NC diet during days 0–21. During days 0–42, supplementation of coated zinc oxide at levels of 500, 1000, and 2000 mg/kg increased ADG compared with NC treatment (<I>P</I> < 0.05). Pigs fed PC, CZO300, CZO500, CZO1000, and CZO2000 diets had lower (<I>P</I> < 0.01) fecal scores compared with those fed NC diet during weeks 1, 2, and 3, but no significant difference was observed among coated zinc oxide-supplemented diets. Pigs fed the PC, CZO1000, or CZO2000 diet had greater (<I>P</I> < 0.05) coefficient of total tract apparent digestibility of dry matter than pigs fed NC diet. Compared with pigs fed NC diets, pigs fed the PC diet or coated zinc oxide-supplemented diets had increased (<I>P</I> < 0.01) serum and fecal zinc concentrations. Duodenal villus height and ratio of villus height to crypt depth of pigs fed PC, CZO1000, and CZO2000 diets were higher (<I>P</I> < 0.05) than those of pigs fed NC diet, whereas no significant differences were observed between pigs fed the PC, CZO1000, and CZO2000 diets. In conclusion, supplementing low doses (500–1000 mg/kg) of coated zinc oxide were as effective in stimulating growth, alleviating post-weaning diarrhea, and improving small intestinal morphology and nutrient digestibility as when a pharmacological level of zinc oxide (2500 mg/kg) was included. Additionally, low doses of coated zinc oxide reduced the amount of zinc excreted into the feces compared with 2500 mg/kg conventional zinc oxide.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We evaluated the effects of coated zinc oxide and conventional zinc oxide in weaned pigs. </LI> <LI> 500–1000 mg/kg coated zinc oxide stimulated growth as effective as 2500 mg/kg conventional zinc oxide in weaned pigs. </LI> <LI> 500–1000 mg/kg coated zinc oxide alleviated post-weaning diarrhea as effective as 2500 mg/kg conventional zinc oxide. </LI> <LI> Feeding coated zinc oxide excreted less zinc into the feces compared with 2500 mg/kg conventional zinc oxide. </LI> </UL> </P>
An Efficient Implementation of Tornado Code for Fault Tolerance
Lei, Jian-Jun,Kwon, Gu-In Korea Spatial Information System Society 2009 한국공간정보시스템학회 논문지 Vol.11 No.2
This paper presents the implementation procedure of encoding and decoding algorithms for Tornado code that can provide fault tolerance for storage and transmission system. The degree distribution satisfying heavy tail distribution is produced. Based on this distribution, a good random irregular bipartite graph is attained after plenty of trails. Such graph construction is proved to be efficient, and the experiments also demonstrate that the implementation obtains good performance in terms of decoding overhead.