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MEROMORPHIC SOLUTIONS OF A COMPLEX DIFFERENCE EQUATION OF MALMQUIST TYPE
Zhang, Ran-Ran,Huang, Zhi-Bo Korean Mathematical Society 2014 대한수학회보 Vol.51 No.6
In this paper, we investigate the finite order transcendental meromorphic solutions of complex difference equation of Malmquist type $$\prod_{i=1}^{n}f(z+c_i)=R(z,f)$$, where $c_1,{\ldots},c_n{\in}\mathbb{C}{\backslash}\{0\}$, and R(z, f) is an irreducible rational function in f(z) with meromorphic coefficients. We obtain some results on deficiencies of the solutions. Using these results, we prove that the growth order of the finite order solution f(z) is 1, if f(z) has Borel exceptional values $a({\in}\mathbb{C})$ and ${\infty}$. Moreover, we give the forms of f(z).
Wen-Yi Zhang,Xin-Ze Xiao,Chao Lv,Jia Zhao,Gong Wang,Xuan Gu,Ran Zhang,Bin-Bin Xu,Dan-Dan Zhang,Ai-Wu Li,Yong-Lai Zhang,Hong-Bo Sun 한국고분자학회 2013 Macromolecular Research Vol.21 No.3
Reported here is the fabrication of photopolymer hierarchical micronanostructures through a combinative process of electrospinning and subsequent photolithography. Electrospun SU-8 (epoxy-based negative photoresist)nanofiber films have been patterned into gratings with periods of 100, 200, 300, and 400 μm, respectively. Deposition of a silver nanolayer on these interlaced nanofiber films would lead to the formation of various plasmonic nanostructures,and therefore, giving rise to abundant surface-enhanced Raman scattering (SERS) “hot spots”. In the detection of Rhodamine 6G (R6G), probing molecule, the resultant SERS substrates show both high sensitivity and good reproducibility. The SERS enhancement factor could reach as high as ~108, indicating high efficiency. The fabrication of patterned, highly efficient SERS substrates may hold a great promise for the integration of SERS substrates in various microdevices such as microfluidic chips.
Zhang, Hong-Yun,Tiggelaar, Sarah M.,Sahasrabuddhe, Vikrant V.,Smith, Jennifer S.,Jiang, Cheng-Qin,Mei, Run-Bo,Wang, Xian-Guo,Li, Zu-An,Qiao, You-Lin Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.1
Objectives: To determine the prevalence of HPV and cervical neoplasia among HIV-infected women in southwestern China. Methods: Cervical cytology, HPV detection by Hybrid Capture-$2^{TM}$ assay, and diagnostic colposcopy were followed by cervical biopsy if indicated. Logistic regression analysis was used to analyze associations between HPV co-infection and cervical intraepithelial neoplasia (CIN), and HIV-related clinical and laboratory parameters. Results: Colposcopic-histopathologically proven CIN2+ lesions were present in 7/83 (8.4%) HIV-infected women. Nearly half (41/83, 43%) were co-infected with carcinogenic HPV genotypes. HPV co-infection was higher in women with colposcopic-histopathologically proven CIN2+ lesions than women with <CIN1 after adjusting for age (OR: 8.3, 95% CI: 0.9, 73.4). Women with CD4+ cell counts less than 350 $cells/{\mu}L$ had higher CIN2+ prevalence after adjusting for current ART status and age (adjusted OR: 6.3, 95% CI: 1.1, 36.5). Conclusions: HIV/AIDS care and treatment programs should integrate effective cervical cancer prevention services to mitigate the risk of invasive cervical cancer among HIV-infected women in China.
Zhang De,Luo Run,Yin Ye-bo,Zou Shu-liang 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.5
This paper presents a hybrid algorithm to solve the multi-objective path planning (MOPP) problem for mobile robots in a static nuclear accident environment. The proposed algorithm mimics a real nuclear accident site by modeling the environment with a two-layer cost grid map based on geometric modeling and Monte Carlo calculations. The proposed algorithm consists of two steps. The first step optimizes a path by the hybridization of improved ant colony optimization algorithm-modified A* (IACO-A*) that minimizes path length, cumulative radiation dose and energy consumption. The second module is the high radiation dose rate avoidance strategy integrated with the IACO-A* algorithm, which will work when the mobile robots sense the lethal radiation dose rate, avoiding radioactive sources with high dose levels. Simulations have been performed under environments of different complexity to evaluate the efficiency of the proposed algorithm, and the results show that IACO-A* has better path quality than ACO and IACO. In addition, a study comparing the proposed IACO-A* algorithm and recent path planning (PP) methods in three scenarios has been performed. The simulation results show that the proposed IACO-A* algorithm is obviously superior in terms of stability and minimization the total cost of MOPP
Systematic identification and characterization of miRNAs and piRNAs from porcine testes
Bo Weng,Maoliang Ran,Maisheng Wu,Fuzhi Peng,Lianhua Dong,Changqing He,Shanwen Zhang,Zhaohui Li,Bin Chen 한국유전학회 2017 Genes & Genomics Vol.39 No.10
microRNAs (miRNAs) and PIWI-interacting RNAs (piRNAs) execute important regulatory roles in testis development and spermatogenesis, while previous studies mainly focus on the expression profiles in immature and mature porcine testes, which may cause a bottleneck for further understanding their complex physiological processes in porcine testes development and spermatogenesis. Thus, we presented the expression and characterization of miRNAs and piRNAs in DS (60-day-old), DN (90-dayold), DT (120-day-old) and DF (150-day-old) pig testes. In total, 12,834,628, 13,359,726, 12,851,249 and 12,938,601 clean reads were generated from these libraries, respectively. 293 mature and 36 novel miRNAs as well as 4923 piRNA clusters were identified from pig testes, and they showed an age-dependent manner. GO enrichment analysis of miRNA target genes and piRNA generated genes showed that they participated widely in regulating the pig spermatogenesis process. In addition, 12 differentially expressed miRNAs were randomly selected to validate using qRT-PCR. Our results provided novel comprehensive expression profiles of miRNAs and piRNAs in pig testes at different stages of sexual maturity, which will promote our knowledge of them in regulating the pig testes development and spermatogenesis process.
Maoliang Ran,Bo Weng,Maisheng Wu,Changqing He,Shanwen Zhang,Bin Chen 한국유전학회 2017 Genes & Genomics Vol.39 No.10
Testicular development and spermatogenesis are strictly regulated with the complex interactions between several cell types in testis. However, the limited availability of genomic and molecular information limits our understanding of this complex physiological process. In this study, we characterized the transcriptome between immature (30-day-old) and mature (180-day-old) pig testes using RNA-seq technology. 24,469 known coding gene transcripts corresponding to 20,566 genes were mapped in these two developmental stages, 3,328 genes were differentially expressed, and numerous novel transcripts and alternative splicing events were also identified. Ten differentially expressed genes were validated by measuring the relative expression using real-time quantitative polymerase chain reaction (PCR). 125 Gene Ontology (GO) terms were significantly enriched, and most of them involved in GO terms related to male reproduction, testicular development, and spermatogenesis. In addition, this study also represented the prediction of 10,000 circRNAs, as well as the validation of six pig circRNAs using Find_cric algorithm. Our study substantially expanded our knowledge about the transcriptomic profile of immature and mature pig testes, and provided a useful resource to study the mechanisms of pig testis development and spermatogenesis at the molecular level.
PROPERTIES ON q-DIFFERENCE RICCATI EQUATION
Huang, Zhi-Bo,Zhang, Ran-Ran Korean Mathematical Society 2018 대한수학회보 Vol.55 No.6
In this paper, we investigate a certain type of q-difference Riccati equation in the complex plane. We prove that q-difference Riccati equation possesses a one parameter family of meromorphic solutions if it has three distinct meromorphic solutions. Furthermore, we find that all meromorphic solutions of q-difference Riccati equation and corresponding second order linear q-difference equation can be expressed by q-gamma function if this q-difference Riccati equation admits two distinct rational solutions and $q{\in}{\mathbb{C}}$ such that 0 < ${\mid}q{\mid}$ < 1. The growth and value distribution of differences of meromorphic solutions of q-difference Riccati equation are also treated.
Active Disturbance Rejection Control for Nanopositioning Systems with Piezoelectric Actuators
Wei Wei,Ran Zhang,Jing Wang,Guang-Bo Hao 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10
Nanopositioning proposes a high demand for its control system. However, hysteresis, a common nonlinear phenomenon existing in piezoelectric actuator, decreases precision of nanopositioning. In this paper, active disturbance rejection control (ADRC) is designed to estimate and cancel the influence of hysteresis, and integral time absolute error (ITAE) optimal index is chosen to determine the parameters of ADRC. Simulations are performed on the basis of mathematic model of nanopositioning system, and numerical results show that ADRC is effective in the control of nanopositioning.
Yufan Wang,Guoqing Zu,Di Zhang,Di Zhang,Weiwei Zhu,Huilan Sun,Bo Wang,Xu Ran 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.11
In the present work, the effect of pre-annealing on the recrystallized texture of hot-rolled Fe-1.6 wt% Si non-oriented electricalsteel was investigated. Vickers hardness test, optical microscope, and electron backscatter diffraction were used to investigatethe changes in the average hardness, microstructure, and texture caused by pre-annealing of hot-rolled strips. It was found thatthe texture successively changed from a near-random distribution to {116} < 151 > texture and near-{001} < 140 > texturedepending on pre-annealing treatments. Also, there was almost no effect on the grain size, and the average grain size of thenormalized bands was 125 μm. Besides, the texture and magnetic properties of the final products under different pre-annealingtreatments were also detected. It was found that the sample obtain a strong Cube texture by pre-annealing. Meanwhile, themagnetic properties are also got an improvement by pre-annealing. In a word, this method may provide a possibility to obtainan ideal grain size and texture simultaneously.