中國湖南報業發展戰略硏究

彭祝斌,彭福楊,梁媛 한국중국문화학회 2001 中國學論叢 Vol.12 No.-

본 논문은 중국 湖甫雀 신문업계의 기본 상황, 인재개발, 매체 자원배치,뉴스, 광고 자원과 여러 시장 등의 5개 방면의 고찰을 통하여, 중국호남 신문업계의 발전과정에 존재하는 문제를 분석하고 더 나아가서는 심층있게 토의하고 중국 湖南省 신문업계의 발전 대책을 제기하는데 있다.본 고는 중국 호남성의 신문업계발전의 기본적인 現狀은 우세한 면도 있지만, 문제점도 안고 있다: 국내외 경제발전의 추세, 적극적이고 은전한 문화산업의 발전 정책, 유구한 湖湘문화의 축적, 우량한 신문전통과 비교적 양호한 신문업계의 기초, 동서로 연결되는 지리자연환경, 풍부한 인구 자원및 광대한 수요시장 공간 및 사회입문이후 가져올 발전 기회등, 모두 湖南省 신문업계가 지니고 있는 우세한 측면이라고 간주되는 동시에, 적지 않은문제점을 안고 있다. 이러한 문제를 요약정리해보면 아래의 5개 방면으로 볼 수 있다: 1.인제개발의 정체 2.매체자원의 배치 불합리. 3.신문뉴스의 빈곤. 4.광고 자원의 결핍. 5.수요시장의 발육 불충분. 상술한 내용을 존재하는 문제에 대하여 본문에서는 호남성 신문업체의 발전 문제에 대하여 다섯 가지의 기본전략을 제기하였다: 1.인재개발 전략: 인재관념을 바꾸며 인재체제를 개혁하고, 후배인재기지구축을 강화함. 2.매개전략을 재조직: 자원배치를 우량화하고 다종 경영을 실시하며 매체 실력을 강화함. 3.뉴스자원의 개발전략: 본거지에 입각하여 전국을 확대하며, 뉴스 자원을 충분하게 발굴한다. 4.광고 발전 전략: 경영이념을 갱신하고 경영방식을 개진한다. 또 광고시장의 이익을 확대한다. 5.수요시장전략: 신문 지명도를 높이고 발행제도를 개혁하여 수요시장을 적극적으로 육성한다.

Multicriteria Optimization via Parameter Space Investigation for Ultralow-Altitude Airdrop L1 Adaptive Controller

Peng Zhu,Wen-han Dong,Yuhao Mao,Ri Liu 한국항공우주학회 2020 International Journal of Aeronautical and Space Sc Vol.21 No.1

This paper presents preliminary results of the application of the parameter space investigation method for the design of the L1 flight control system implemented on the ultralow-altitude airdrop process. In particular, the study has established the task performance level of airdrop mission which is chosen as the optimization objective in this paper. According to the characteristics of ultralow-altitude airdrop process, 12 optimization criteria are designated as the constraints during the multicriteria optimization. After two iterations, the task performance level of the airdrop is improved from “Moderate” to “Expected”. The results in the paper confirms the suitability of the parameter space investigation method for the multicriteria design optimization of an airdrop flight control system subject to desired control specifications. In addition, the robustness and dynamic response of the flight control system are significantly improved after optimization. Moreover, the analysis of optimization results has contributed to a deeper understanding of the relationship between L1 controller parameters and airdrop task performance.

Analysis of underwater explosion shock on ship shaft stern bearing lubrication characteristics under different bearing working conditions

Zhu Junchao,Wei Guangcheng,Peng Zilong,Xia Zhaowang,Zheng Liangyan,Zhu Hanhua 대한조선학회 2022 International Journal of Naval Architecture and Oc Vol.14 No.1

Warship always face the threat of underwater explosion shock, which may affect the ship stern tube bearing lubrication performance when the propeller shaft is bending. This paper builds the coupling model of shaft longitudinal vibration and bearing lubrication with consideration of shaft axial shock and misalignment. The performance of stern bearing under the influence of explosion shock was analyzed by solving the generalized Reynolds equation, shaft longitudinal vibration equation and explosion shock equation. The result shows that: the effect of underwater explosion shock on bearing lubrication performance is transient, and the effect will be more obvious when the bearing works at close quarter, larger misaligned angle, eccentricity and rotation speed. Moreover, the edge effect which caused by shaft bending will increase with the decrease of explosion distance and the increase of eccentricity.

Experimental Study on Chloride Diffusion in Structural Concrete Considering the Effect of Damages Induced by the Cyclic Impact Loading

Peng-yu Zhu,Yong-lai Zheng,Wen-bin Luo,Jia Kou,Ru-xue Zhang,Shu-xin Deng 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.1

An experimental investigation on chloride diffusion in structural concrete under the cyclic impact loading is conducted. Effects of magnitudes and loading times are studied. Relationship between damage coefficients and chloride diffusion coefficients is obtained. The cyclic impact loading causes the initiation of new cracks and the propagation of existing cracks, which brings an obvious promotion for chloride diffusion. There should be a damage threshold. If the magnitude of the external loading is large enough to make the damage exceed the threshold, initiation and propagation of cracks become quite significant and chloride diffusion can be greatly promoted. With the increase of the damage coefficient, the chloride diffusion coefficient increases. The increasing rates decrease with long immersion times. Relationship curves of damage coefficients and chloride diffusion coefficients show a good correlation and can be well described with power functions.

Strain energy-based fatigue life prediction under variable amplitude loadings

Zhu, Shun-Peng,Yue, Peng,Correia, Jose,Blason, Sergio,De Jesus, Abilio,Wang, Qingyuan Techno-Press 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.66 No.2

With the aim to evaluate the fatigue damage accumulation and predict the residual life of engineering components under variable amplitude loadings, this paper proposed a new strain energy-based damage accumulation model by considering both effects of mean stress and load interaction on fatigue life in a low cycle fatigue (LCF) regime. Moreover, an integrated procedure is elaborated for facilitating its application based on S-N curve and loading conditions. Eight experimental datasets of aluminum alloys and steels are utilized for model validation and comparison. Through comparing experimental results with model predictions by the proposed, Miner's rule, damaged stress model (DSM) and damaged energy model (DEM), results show that the proposed one provides more accurate predictions than others, which can be extended for further application under multi-level stress loadings.

New insight into the mandibular nerve at the foramen ovale level for percutaneous radiofrequency thermocoagulation

Peng-Bo Zhu,Yeon-Dong Kim,Ha Yeong Jeong,Miyoung Yang,Hyung-Sun Won 대한통증학회 2023 The Korean Journal of Pain Vol.36 No.4

Background: Percutaneous radiofrequency thermocoagulation (RFTC) has been widely utilized in the management of trigeminal neuralgia. Despite using image guidance, accurate needle positioning into the target area still remains a critical element for achieving a successful outcome. This study was performed to precisely clarify the anatomical information required to ensure that the electrode tip is placed on the sensory component of the mandibular nerve (MN) at the foramen ovale (FO) level. Methods: The study used 50 hemi-half heads from 26 South Korean adult cadavers. Results: The cross-sectioned anterior and posterior divisions of the MN at the FO level could be distinguished based on an irregular boundary and color difference. The anterior division was clearly brighter than the posterior one. The anterior division of the MN at the FO level was located at the whole anterior (38.0%), anteromedial (6.0%), anterior center (8.0%), and anterolateral (22.0%) parts. The posterior division was often located at the whole posterior or posterolateral parts of the MN at the FO level. The anterior divisions covered the whole MN except for the medial half of the posterolateral part in the overwrapped images of the cross-sectional areas of the MN at the FO level. The cross-sectional areas of the anterior divisions were similar in males and females, whereas those of the posterior divisions were significantly larger in males (P = 0.004). Conclusions: The obtained anatomical information is expected to help physicians reduce unwanted side effects after percutaneous RFTC within the FO for the MN.

Chemoenzymatic Synthesis of Dual-responsive Amphiphilic Block Copolymers and Drug Release Studies

Peng Chen,Ya-Peng Li,Shu-Wei Wang,Xin-Lei Meng,Ming Zhu,Jing-Yuan Wang 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.6

Dual-responsive amphiphilic block copolymers were synthesized by combining enzymatic ring-opening polymerization (eROP) of ε-caprolactone (CL) and ATRP of N,N-dimethylamino-2-ethyl methacrylate (DMAEMA). The obtained block copolymers were characterized by gel permeation chromatography (GPC), 1H NMR and FTIR-IR. The critical micelle concentration (CMC) of copolymer was determined by fluorescence spectra, it can be found that with hydrophilic block (PDMAEMA) increasing, CMC value of the polymer sample increased accordingly, and the CMC value was 0.012 mg/mL, 0.025 mg/mL and 0.037 mg/ mL for PCL50-b-PDMAEMA68, PCL50-b-PDMAEMA89, PCL50-b-PDMAEMA112, PCL50-b-PDMAEMA89 was chosen as drug carrier to study in vitro release profile of anti-cancer drug (taxol). The temperature and pH dependence of the values of hydrodynamic diameter (Dh) of micelles, and self-assembly of the resulting block copolymers in water were evaluated by dynamic light scattering (DLS). The result showed that with the temperature increasing and pH decreasing, the Dh decreased. Drug-loaded nanoparticles were fabricated using paclitaxel as model. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) had been explored to study the morphology of the hollow micelles and the nanoparticles, revealing well-dispersed spheres with the average diameters both around 80 nm. In vitro release kinetics of paclitaxel from the nanoparticles was also investigated in different conditions (pH and temperature, etc.), revealing that the drug release was triggered by temperature changes upon the lower critical solution temperature (LCST) at pH 7.4, and at 37 °C by an increase of pH.

H-형태 양친매성 펜타블록 공중합체의 화학효소적 합성과 자기회합거동 평가

Peng Chen,Ya Peng Li,Can Jin Li,Xin Lei Meng,Bao Zhang,Ming Zhu,Yan-jing Liu,Jing Yuan Wang 한국고분자학회 2013 폴리머 Vol.37 No.3

H-shaped amphiphilic pentablock copolymers (PSt)2-b-PCL-b-PEO-b-PCL-b-(PSt)2 was synthesized via chemoenzymatic method by combining enzyme-catalyzed ring-opening polymerization (eROP) of ε-caprolactone (ε-CL) and atom transfer radical polymerization (ATRP) of styrene. By this process, we obtained copolymers with controlled molecular weight and low polydispersity. The structure and composition of the obtained copolymers were characterized by nuclear magnetic resonance (NMR), gel permeation chromatography (GPC) and infrared spectroscopy analysis (IR). The crystallization behavior of the copolymers was analyzed by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The crystallization behavior of the H-shaped block copolymers demonstrated a PCL dominate crystallization. The self-assembly behavior of the copolymers was investigated in aqueous media. The hydrodynamic diameters of the copolymer micelles in aqueous solution were measured by dynamic light scattering (DLS). The morphology of the copolymer micelles was observed by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The hydrodynamic diameters of spherical micelles declined gradually with the increase of the hydrophobic chain lengths of the copolymers. The critical micelle concentration (CMC) values were determined from fluorescence emission, and it was found that the CMCs decreased with an increase of PSt hydrophobic block lengths.

Molecular Phylogeny and Modular Structure of Hybrid NRPS/PKS Gene Fragment of Pseudoalteromonas sp. NJ6-3-2 Isolated From Marine Sponge Hymeniacidon perleve

Peng Zhu,Yan Ling Zheng,Yu Rong You,Xiao Jun Yan,Jian Zhong Shao 한국미생물 · 생명공학회 2009 Journal of microbiology and biotechnology Vol.19 No.3

The Research and Application of Protective Coating for PCCP

( Zhu Lin ),( Cui Zhu Xu ),( Li Zhang ),( Yun Peng Fan ),( Qi Bin Zhang ) 한국부식방식학회(구 한국부식학회) 2008 Corrosion Science and Technology Vol.7 No.5