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COMMON SOFTWARE FOR ANALYSIS OF NOISE IN OPTICAL FIBER COMMUNICATION
Feng, Ji Yue,Lin, Bai,Rui, Li Guo 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
In this paper, we propose a mathematical model for analysis of noise in optical fiber transmission system. A practical common software is designed for noise simulation by computer with this model. Based on reference 2, the software is proved useful and effective in analyzing their relative contributions of various noise sources to system performance. This provides important theoretical basis for system design and application.
SSR and SCAR mapping of a multiple-allele male-sterile gene in Chinese cabbage (Brassica rapa L.)
Feng, Hui,Wei, Peng,Piao, Zhong-Yun,Liu, Zhi-Yong,Li, Cheng-Yu,Wang, Yu-Gang,Ji, Rui-Qin,Ji, Shu-Juan,Zou, Ting,Choi, Su-Ryun,Lim, Yong-Pyo Springer-Verlag 2009 TAG. Theoretical and applied genetics. Theoretisch Vol.119 No.2
Ji-Feng Shi,Qing-Yu Xu,Wen-Chao Guo,Guo-Qing Li 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.3
Trehalosemetabolism is critical for production of ATP, provision of carbon source, and facilitation of carbohydrate absorption. Trehalose-6-phosphate synthase (TPS) is a rate-limiting enzyme in trehalose biosynthesis. In the present paper, a TPS gene (LdTPS)was cloned inLeptinotarsa decemlineata. At young larval instars, the expression levels of LdTPS were high just before and right after ecdysis, and were low at the mid instar stages. In the fourthinstar larvae, two peaks occurred at 24 h after ecdysis and at the wandering stage. In vitro midgut culture and an in vivo bioassay revealed that 20E stimulated LdTPS transcription. Conversely, a reduction of 20E by RNA interference (RNAi) of a prothoracicotropic hormone receptor gene LdTorso and an ecdysteroidogenesis gene LdSHD repressed LdTPS expression. Moreover, disruption of 20E signaling by knockdown of LdEcR, LdE75 and LdFTZ-F1 reduced LdTPS transcript levels. Similarly, in vitro culture and an in vivo bioassay showed that exogenous JH or JH analog methoprene and pyriproxyfen activated LdTPS expression. An increase in endogenous JH by RNAi of an allatostatin gene LdAS-C enhanced the transcription. In contrast, a decrease in JH by silencing of a JH biosynthesis gene LdJHAMT downregulated LdTPS expression. Moreover, knockdown of LdILP2 repressed LdTPS transcription. Therefore, LdTPS transcription is tuned by 20E, JH and ILP signaling pathways in L. decemlineata.
Feng Xu,Hua Cheng,Rong Cai,Lin Ling Li,Jie Chang,Jun Zhu,Feng Xia Zhang,Liu Ji Chen,Yan Wang,Shu Han Cheng,Shui Yuan Cheng 한국분자세포생물학회 2008 Molecules and cells Vol.26 No.6
Anthocyanidin synthase (ANS, leucoanthocyanidin oxygenase), a 2-oxoglutarate iron-dependent oxygenase, catalyzed the penultimate step in the biosynthesis of the anthocyanin class of flavonoids, from the colorless leucoanthocyanidins to the colored anthocyanidins. The full-length cDNA and genomic DNA sequences of ANS gene (designated as GbANS) were isolated from Ginkgo biloba for the first time. The full-length cDNA of GbANS contained a 1062-bp open reading frame (ORF) encoding a 354-amino-acid protein. The genomic DNA analysis showed that GbANS gene had three exons and two introns. The deduced GbANS protein showed high identities to other plant ANSs. The conserved amino acids (H-X-D) ligating ferrous iron and residues (R-X-S) participating in 2-oxoglutarate binding were found in GbANS at the similar positions like other ANSs. Southern blot analysis indicated that GbANS belonged to a multi-gene family. The expression analysis by real-time PCR showed that GbANS expressed in a tissue-specific manner in G. biloba. GbANS was also found to be up-regulated by all of the six tested abiotic stresses, UV-B, abscisic acid, sucrose, salicylic acid, cold and ethylene, consistent with the promoter region analysis of GbANS. The recombinant protein was successfully expressed in E. coli strain with pET-28a vector. The in vitro enzyme activity assay by HPLC indicated that recombinant GbANS protein could catalyze the formation the cyanidin from leucocyanidin and conversion of dihydroquercetin to quercetin, suggesting GbANS is a bifunctional enzyme within the anthocyanidin and flavonol biosynthetic pathway.
Prognostic Value of Preoperative Serum CA 242 in Esophageal Squamous Cell Carcinoma Cases
Feng, Ji-Feng,Huang, Ying,Chen, Qi-Xun Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.3
Purpose: Carbohydrate antigen (CA) 242 is inversely related to prognosis in many cancers. However, few data regarding CA 242 in esophageal cancer (EC) are available. The aim of this study was to determine the prognostic value of CA 242 and propose an optimum cut-off point in predicting survival difference in patients with esophageal squamous cell carcinoma (ESCC). Methods: A retrospective analysis was conducted of 192 cases. A receiver operating characteristic (ROC) curve for survival prediction was plotted to verify the optimum cuf-off point. Univariate and multivariate analyses were performed to evaluate prognostic parameters for survival. Results: The positive rate for CA 242 was 7.3% (14/192). The ROC curve for survival prediction gave an optimum cut-off of 2.15 (U/ml). Patients with CA 242 ${\leq}$ 2.15 U/ml had significantly better 5-year survival than patients with CA 242 >2.15 U/ml (45.4% versus 22.6%; P=0.003). Multivariate analysis showed that differentiation (P=0.033), CA 242 (P=0.017), T grade (P=0.004) and N staging (P<0.001) were independent prognostic factors. Conclusions: Preoperative CA 242 is a predictive factor for long-term survival in ESCC, especially in nodal-negative patients. We conclude that 2.15 U/ml may be the optimum cuf-off point for CA 242 in predicting survival in ESCC.
AUTOMATIC DETECTION AND EXTRACTION ALGORITHM OF INTER-GRANULAR BRIGHT POINTS
Feng, Song,Ji, Kai-Fan,Deng, Hui,Wang, Feng,Fu, Xiao-Dong The Korean Astronomical Society 2012 Journal of The Korean Astronomical Society Vol.45 No.6
Inter-granular Bright Points (igBPs) are small-scale objects in the Solar photosphere which can be seen within dark inter-granular lanes. We present a new algorithm to automatically detect and extract igBPs. Laplacian and Morphological Dilation (LMD) technique is employed by the algorithm. It involves three basic processing steps: (1) obtaining candidate "seed" regions by Laplacian; (2) determining the boundary and size of igBPs by morphological dilation; (3) discarding brighter granules by a probability criterion. For validating our algorithm, we used the observed samples of the Dutch Open Telescope (DOT), collected on April 12, 2007. They contain 180 high-resolution images, and each has a $85{\times}68\;arcsec^2$ field of view (FOV). Two important results are obtained: first, the identified rate of igBPs reaches 95% and is higher than previous results; second, the diameter distribution is $220{\pm}25km$, which is fully consistent with previously published data. We conclude that the presented algorithm can detect and extract igBPs automatically and effectively.
Feng, Ji-Feng,Zhao, Qiang,Chen, Qi-Xun Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.5
Purpose: The 7th edition of the American Joint Committee on Cancer Staging Manual for esophageal cancer (EC) categorizes N stage according to the number of metastatic lymph nodes (LNs), irrespective of the site. The aim of this study was to determine the prognostic value of subcarinal LN metastasis in patients undergoing esophagectomy for esophageal squamous cell carcinoma (ESCC). Methods: A retrospective analysis of 507 consecutive patients with ESCC was conducted. Potential clinicopathological factors that could influence subcarinal LN metastasis were statistically analyzed. Univariate and multivariate analyses were also performed to evaluate the prognostic parameters for survival. Results: The frequency of subcarinal LN metastasis was 22.9% (116/507). Logistic regression analysis showed that tumor length (>3cm vs ${\leq}3cm$; P=0.027), tumor location (lower vs upper/middle; P=0.009), vessel involvement (Yes vs No; P=0.001) and depth of invasion (T3-4a vs T1-2; P=0.012) were associated with 2.085-, 1.810-, 2.535- and 2.201- fold increases, respectively, for risk of subcarinal LN metastasis. Multivariate analyses showed that differentiation (poor vs well/moderate; P=0.001), subcarinal LN metastasis (yes vs no; P=0.033), depth of invasion (T3-4a vs T1-2; P=0.014) and N staging (N1-3 vs N0; P=0.001) were independent prognostic factors. In addition, patients with subcarinal LN metastasis had a significantly lower 5-year cumulative survival rate than those without (26.7% vs 60.9%; P<0.001). Conclusions: Subcarinal LN metastasis is a predictive factor for long-term survival in patients with ESCC.