The Mathematic Model of "Pressing Complexion" Differential Coefficient Countermeasure Decision for Collision-avoidance

Cai Feng,Shi Aiguo,Yang Baozhang,Zhou Lixin 한국항해항만학회 2001 한국항해항만학회 학술대회논문집 Vol.3 No.-

In this article, we have done some analysis about the collision-avoidance specialty of "pressing complexion" and "pressing danger" in the meet process of two boats, and offered a mathematic model of differential coefficient countermeasure decision for collision-avoidance. which adapt to the right complexion. The basal idea is, in the right condition whatever do the coming boat do, and our boat will always adopt dynamic, continuous and the best countermeasure. When both the controlling capabilities of two boats have advantage and inferior position, we can working-out with the qualitative differential coefficient countermeasure.

Supply chain

CaiFeng Li 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10

In this paper, we address thoroughly the definition of supply chain from multiple angles and present two ideas both time-based competition and the demand-driven perspectiv. This paper analyzed the behaviours under the guidance of ideas. They are respectively adding value using time opportunity aiding information technology for end-consumer and suppliers, rising end-consumer expectations through the marketing perspective. But the proliferation of products and service, shorter product cycle"s 21st lead to respond quickly are not enough to consumer demands. The situation obliges to enterprise to construct agile supply chain to meet calling of the age. I believe that it advent and it will be a main stream of a fluid for the future.

Influences of substrate temperature on the structural, optical and electrical properties of ZnS/Au/ZnS multilayer films

Wang Caifeng 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.1

ZnS/Au/ZnS (ZAZ) films which are nano-multilayer and transparent conductive films, were fabricated on quartz substrates at different substrate temperatures via pulsed laser deposition, and the influences of substrate temperature on the structural and optoelectrical characteristics of ZAZ films were researched. X-ray diffraction (XRD) diagrams show that the crystallinity and the quality of the films are improved at higher substrate temperatures, and scanning electron microscope (SEM) show that the film’s surface becomes dense and rough. The substrate temperature also seriously affects the optoelectronic characteristics of ZAZ films. When the substrate temperature is increased, the figure of merit for the ZAZ films decreases. When substrate temperature is 20 ℃, the ZAZ film has the largest figure of merit value (3.34 × 10–3 Ω−1), with an average transmission of 81% in the visible region and a carrier concentration of 1.91 × 1021 cm−3. Transparent, conducting ZAZ films have great potential applications in high-performance optoelectronic devices.

γ-Aminobutyric acid boosts chilling tolerance by promoting the methionine sulfoxide reductase-thioredoxin reductase system in peach fruit

Jiao Caifeng 한국원예학회 2022 Horticulture, Environment, and Biotechnology Vol.63 No.3

The effects of γ-aminobutyric acid (GABA) on promotion of chilling tolerance and the methionine sulfoxide reductase (MSR)-thioredoxin reductase (TrxR) system in peach (Prunus persica) fruit were investigated. The peaches were immersed in distilled water (as a control) and GABA solution followed by chilling treatment for 35 days. GABA treatment suppressed the augmentation of chilling injury (CI) index and weight loss rate, and the decline of firmness and total soluble solids content in peaches caused by chilling. The superoxide anion (O2·−) production rate, hydrogen peroxide (H2O2) content and reactive oxygen species accumulation were also retarded following GABA application. GABA treatment elevated the activity and gene expression of methionine sulfoxide reductase A (MSRA) and MSRB. Moreover, the activity and gene expression of TrxR were enhanced by GABA application. Additionally, GABA treatment increased the reduced nicotinamide adenine dinucleotide phosphate (NADPH) content and decreased the oxidized nicotinamide adenine dinucleotide phosphate (NADP) content, consequently boosting the NADPH/NADP ratio. Also, the activity and gene expression of glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6GPDH) were promoted following GABA application. Thus, GABA treatment induced the MSR-TrxR system, consequently reducing CI in peaches.

Crystal Structure, Fluorescence Property and Theoretical Calculation of the Zn(II) Complex with o-Aminobenzoic Acid and 1,10-Phenanthroline

Zhongyu Zhang,Caifeng Bi,Yuhua Fan,Nan Zhang,Xingchen Yan,Jian Zuo,Xia Zhang 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.6

A novel complex [Zn(phen)(o-AB)2] [phen: 1,10-phenanthroline o-AB: o-aminobenzoic acid] was synthesized and characterized by elemental analysis and X-ray diffraction single-crystal analysis. The crystal crystallizes in monoclinic, space group P2(1)/c with a = 7.6397(6) Å, b = 16.8761(18) Å, c = 17.7713(19) Å, α = 90°, β = 98.9570(10)°, γ = 90°, V = 2.2633(4) nm3, Z = 4, F(000) = 1064, S = 1.058, Dc = 1.520 g·cm−3, R1 = 0.0412, wR2 = 0.0948, μ = 1.128 mm−1. The Zn(II) is six coordinated by two nitrogen and four oxygen atoms from the 1,10-phenanthroline and o-aminobenzoic acid to furnish a distorted octahedron geometry. The complex exhibits intense fluorescence at room temperature. Theoretical studies of the title complex were carried out by density functional theory (DFT) B3LYP method. CCDC: 898291.

Estimating equation for additive hazards model with censored length-biased data

Hongping Wu,Caifeng Du,Xiaosha Li 한국통계학회 2020 Journal of the Korean Statistical Society Vol.49 No.1

Aalen’s additive hazards model plays a very important role in survival analysis. In this paper we are interested in the problem of estimating regression coefficients in the additive hazards model with censored length-biased data. Through both of the parametric invariance of the proportional likelihood ratio model and the unique structure of length-biased data, we propose a pairwise pseudo-likelihood estimating equation, which only relies on the complete residual lifetimes in censored length-biased data. In addition, two combined estimating equations are also considered to estimate covariate coefficients. These estimators are proved to be consistent and asymptotically normal. In order to evaluate the performance of the proposed estimators in a finite sample, some simulations are conducted. Finally, a real data example is also provided.

Crystal Structure and Tautomerism Study of the Mono-protonated Metformin Salt

Xiaodan Wei,Yuhua Fan,Caifeng Bi,Xingchen Yan,Xia Zhang,Xin Li 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.12

A novel crystal, the mono-protonated metformin acetate (1), was obtained and characterized by elemental analysis, IR spectroscopy and X-ray crystallography. It was found that one of the imino group in the metformin cation was protonated along with the proton transfer from the secondary amino group to the other imino group. Its crystal structure was then compared with the previously reported diprotonated metformin oxalate (2). The difference between them is that the mono-protonated metformin cations can be linked by hydrogen bonding to form dimers while the diprotonated metformin cations cannot. Both of them are stabilized by intermolecular hydrogen bonds to assemble a 3-D supermolecular structure. The four potential tautomer of the monoprotonated metformin cation (tautomers 1a, 1b, 1c and 1d) were optimized and their single point energies were calculated by Density Functional Theory (DFT) B3LYP method based on the Polarized Continuum Model (PCM) in water, which shows that the most likely existed tautomer in human cells is the same in the crystal structure. Based on the optimized structure, their Wiberg bond orders, Natural Population Analysis (NPA) atomic charges, molecular electrostatic potential (MEP) maps were calculated to analyze their electronic structures, which were then compared with the corresponding values of the diprotonated metformin cation (cation 2) and the neutral metformin (compound 3). Finally, the possible tautomeric mechanism of the monoprotonated metformin cation was discussed based on the observed phenomena.

A Survey of Loop Parallelization: Models, Approaches, and Recent Developments

Hong Yao,Huifang Deng,Caifeng Zou 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.11

In cloud computing era, automatic parallelization is still significant for virtualization platform. However, after several decades of development, the overall effect is still to be improved. Summary of the mainstream technology developments will be beneficial to reveal the future direction and trend. This paper reviews the technology of loop parallelization, which is the key issue in automatic parallelization. After introducing the basic models and approaches, we focus on the recent developments, on which we obtain the trend of this field and the conclusions about future.

Crystal Structure, Fluorescence Property and Theoretical Calculation of the Zn(II) Complex with o-Aminobenzoic Acid and 1,10-Phenanthroline

Zhang, Zhongyu,Bi, Caifeng,Fan, Yuhua,Zhang, Xia,Zhang, Nan,Yan, Xingchen,Zuo, Jian Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.6

A novel complex [$Zn(phen)(o-AB)_2$] [phen: 1,10-phenanthroline o-AB: o-aminobenzoic acid] was synthesized and characterized by elemental analysis and X-ray diffraction single-crystal analysis. The crystal crystallizes in monoclinic, space group P2(1)/c with $a=7.6397(6){\AA}$, $b=16.8761(18){\AA}$, $c=17.7713(19){\AA}$, ${\alpha}=90^{\circ}$, ${\beta}=98.9570(10)^{\circ}$, ${\gamma}=90^{\circ}$, $V=2.2633(4)nm^3$, Z = 4, F(000) = 1064, S = 1.058, $Dc=1.520g{\cdot}cm^{-3}$, $R_1=0.0412$, $wR_2=0.0948$, ${\mu}=1.128mm^{-1}$. The Zn(II) is six coordinated by two nitrogen and four oxygen atoms from the 1,10-phenanthroline and o-aminobenzoic acid to furnish a distorted octahedron geometry. The complex exhibits intense fluorescence at room temperature. Theoretical studies of the title complex were carried out by density functional theory (DFT) B3LYP method. CCDC: 898291.

Optoelectronic Characteristics of UV Photodetector Based on GaN/ZnO Nanorods p-i-n Heterostructures

Qingshan Li,Lichun Zhang,Fengzhou Zhao,Caifeng Wang,Feifei Wang,Ruizhi Huang 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.4

We demonstrate an efficient ultraviolet (UV) photodetector operating at room temperature based on n-ZnO nanorods/i-ZnO/p-GaN heterojunctions. We employ x-ray diffraction and field-emission scanning electron microscopy to confirm the high quality of the ZnO nanorods using an undoped ZnO film as the interlayer. Then, we investigate the photoelectric properties of the fabricated photodetector with UV light illumination under a different reverse bias. Based on the current-voltage curve, the photocurrent to dark current ratio is approximately 73.3 at −4 V. At zerobias voltage, the peak responsivity was 138.9 mA/W at 362 nm under front-illumination conditions. Time-varying measurements indicate the reproducibility and stability of the heterojunction photodetector.