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Lian-Zhou Wang,Chun-Yu Guo,Yu-Min Su,Tie-Cheng Wu 대한조선학회 2018 International Journal of Naval Architecture and Oc Vol.10 No.2
The characteristics of the relationship between the evolution of propeller trailing vortex wake and skew angle are numerically examined based on four different five-blade David Taylor Model Basin (DTMB) model propellers with different skew angles. Numerical simulations are based on Reynolds-averaged NaviereStokes (RANS) equations combined with SST k u turbulence model. Results show that the contraction of propeller trailing vortex wake can be restrained by increasing skew angle and loading conditions, and root vortices fade away when the propeller skew angle increases. With the increase of the propeller's skew angle, the deformation of the hub vortex and destabilization of the tip vortices are weakening gradually because the blade-to-blade interaction becomes weaker. The transition trailing vortex wake from stability to instability is restrained when the skew increases. Furthermore, analyses of tip vortice trajectories show that the increasing skew can reduce the difference in trailing vortex wake contraction under different loading conditions.
THE BEHAVIOR OF INTERFACE COATINGS IN SOME METAL MATRIX COMPOSITES
Wang, Wang, Yu-Qing,Zhou, Zhou, Ben-Lian 한국재료학회 1995 Fabrication and Characterization of Advanced Mater Vol.1 No.2
The behavior of SiC coating in carbon fiber reinforced aluminum, metal coatings, Ni, Fe in carbon fiber reinforced copper and alumina coated $K_2O{\cdot}6TiO_2$ whisker reinforced aluminum composites were investigated, respectively, by modern devices, like TEM, SEM etc. with the goal of controlling the interfacial interaction and wettability of reinforcement, like carbon fibers, $K_2O{\cdot}6TiO_2$ whiskers with matrices. SiC coating produced by a polycarbosilane solution process improved effectively the strength because it successfully resisted the oxidation of carbon fibers themselves and the harmful reaction between carbon fibers and molten aluminum during fabrication process and heating process of the composites. The metal coating, Fe and Ni by electrical plating, strengthened the bonding of carbon fibers with copper, by changing the bonding state of the interface from mechanical one to partly chemical one. Therefore the strengths of composites were improved obviously. The aluminal coating on $K_2O{\cdot}6TiO_2$ alos controlled the diffusion of K element from whiskers into aluminum matrix and reaction with aluminum and led the optimaization of interfacial bonding between the whiskers and aluminum, so that the properties of the composites reached a higher level.
Wang, Lian-Zhou,Guo, Chun-Yu,Su, Yu-Min,Wu, Tie-Cheng The Society of Naval Architects of Korea 2018 International Journal of Naval Architecture and Oc Vol.10 No.2
The characteristics of the relationship between the evolution of propeller trailing vortex wake and skew angle are numerically examined based on four different five-blade David Taylor Model Basin (DTMB) model propellers with different skew angles. Numerical simulations are based on Reynolds-averaged Naviere-Stokes (RANS) equations combined with SST $k-{\omega}$ turbulence model. Results show that the contraction of propeller trailing vortex wake can be restrained by increasing skew angle and loading conditions, and root vortices fade away when the propeller skew angle increases. With the increase of the propeller's skew angle, the deformation of the hub vortex and destabilization of the tip vortices are weakening gradually because the blade-to-blade interaction becomes weaker. The transition trailing vortex wake from stability to instability is restrained when the skew increases. Furthermore, analyses of tip vortice trajectories show that the increasing skew can reduce the difference in trailing vortex wake contraction under different loading conditions.
Zhou, Cui,Jiang, Song-Song,Wang, Cui-Yan,Li, Rong,Che, Hui-Lian Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.8
To assess inhibition mechanisms of a Phellinus igniarius (PI) extract on cancer, C57BL/6 mice were orally treated with PI extractive after or before implanting H22 (hepatocellular carcinoma ) or B16 (melanoma) cells. Mice were orally gavaged with different doses of PI for 36 days 24h after introduction of H22 or B16 cells. Mice in another group were orally treated as above daily for 42 days and implanted with H22 cells on day 7. Then the T lymphocyte, antibody, cytokine, LAK, NK cell activity in spleen, tumor cell apoptosis status and tumor inhibition in related organs, as well as the expression of iNOS and PCNA in tumor tissue were examined. The PI extract could improve animal immunity as well as inhibit cancer cell growth and metastasis with a dose-response relationship. Notably, PI's regulation with the two kinds of tumor appeared to occur in different ways, since the antibody profile and tumor metastasis demonstrated variation between animals implanted with hepatocellular carcinoma and melanoma cells.
Lian-feng Wei,Chen Bao,Shi-zhong Wang,Yong Zheng,Meng-bin Zhou 한국원자력학회 2020 Nuclear Engineering and Technology Vol.52 No.8
Low cycle fatigue tests on the hydrogenated welding seam of ZreSneNb alloy at room temperature and 360 C had been carried out by using the funnel-shaped flat specimens. The relationships between nominal stress & strain directly measured across the funnel and local stress & strain at the root of the funnel are given by considering cyclic plasticity correction. The results show that the fatigue resistance of welding seam at room temperature is only slightly better than that at 360 C. Probabilistic fatigue life curves are obtained by using a two-parameter power function.
Zhou Meng-jiao,Yang Jia-jie,Ma Ting-yao,Feng Ge-xuan,Wang Xue-lian,Wang Li-Yong,Ge Yu-ze,Gao Ran,Hong-liang Liu,Shan Lin,Kong Lu,Chen Xiao-hong 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-
MYB-NFIB fusion and NOTCH1 mutation are common hallmark genetic events in salivary gland adenoid cystic carcinoma (SACC). However, abnormal expression of MYB and NOTCH1 is also observed in patients without MYB-NFIB fusion and NOTCH1 mutation. Here, we explore in-depth the molecular mechanisms of lung metastasis through single-cell RNA sequencing (scRNA-seq) and exome target capture sequencing in two SACC patients without MYB-NFIB fusion and NOTCH1 mutation. Twenty-five types of cells in primary and metastatic tissues were identified via Seurat clustering and categorized into four main stages ranging from near-normal to cancer-based on the abundance of each cell cluster in normal tissue. In this context, we identified the Notch signaling pathway enrichment in almost all cancer cells; RNA velocity, trajectory, and sub-clustering analyses were performed to deeply investigate cancer progenitor-like cell clusters in primary tumor-associated lung metastases, and signature genes of progenitor-like cells were enriched in the “MYC_TARGETS_V2” gene set. In vitro, we detected the NICD1-MYB-MYC complex by co-immunoprecipitation (Co-IP) and incidentally identified retinoic acid (RA) as an endogenous antagonist of genes in the “MYC_TARGETS_V2” gene set. Following this, we confirmed that all-trans retinoic acid (ATRA) suppresses the lung metastasis of SACC by correcting erroneous cell differentiation mainly caused by aberrant NOTCH1 or MYB expression. Bioinformatic, RNA-seq, and immunohistochemical (IHC) analyses of primary tissues and metastatic lung tissues from patients with SACC suggested that RA system insufficiency partially promotes lung metastasis. These findings imply the value of the RA system in diagnosis and treatment.
Lian Xiaoxue,Li Yan,Zou Yunling,An Dongmin,Wang Qiong,Zhou Qingjun,Li Xueqi 한국물리학회 2022 Current Applied Physics Vol.39 No.-
The g-C3N4 nanosheets were synthesized by a multistage program calcination with different heating rate, which was an easy, low-cost, and quick method. The morphology and structure of samples were characterized by various techniques. The performance evaluation of the samples was tested by degrading Rhodamine B, Methylene Blue, Tetracycline Hydrochloride and P-Nitrophenol in visible light. The results show that the photodegradation properties of TP-g-C3N4 prepared by multistage program calcination are the best than others. In particular, the degradation rate of TP-g-C3N4 to Rhodamine B reached 99.6% in just 4 min. TP-g-C3N4 catalyst has excellent stability and recycling performance. According to free radical capture experiments, •O2- may be the main active species for pollutant degradation. The possible photocatalytic degradation mechanism was also discussed. Due to the high specific surface area and a narrow band gap, the TP-g-C3N4 becomes a promising photocatalyst.
Konjac Glucomannan Derived Carbon Aerogels for Multifunctional Applications
Jie Lian,Jiwei Li,Liang Wang,Ru Cheng,Xiuquan Tian,Xue Li,Jian Zhou,Tao Duan,Wenkun Zhu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.10
Environmental and energy issues have always been a hot topic of global research. Oil leakage has caused great damage to the environment, affecting a wide area and it is difficult to clean up. In most cases, carbon-based adsorbents are typically utilized to remove oil spills because of their economic benefits and high adsorbent efficiency. At the same time, its excellent material properties can also be used for the preparation of supercapacitors. In this paper, the carbon aerogels were prepared by the one-step method. The prepared materials endowed a 3D network structure with a huge number of micropores and mesoporous, and the material is light-weight, stable, hydrophobic and has affinity for oil (17.02 g/g) to the KGM carbon aerogel. Through the physicchemical characterization, the KGM carbon aerogel shows specific surface area is 689m2/g, high water contact angle (136.64°) and excellent reusability (more than 15 cycle times). In addition, we also discussed the electrochemical properties of the material and obtained the specific electrical capacity of 139 F/g under the condition of 1 A/g.
Chang-Lian Xu,Shiyi Wang,Lu Zhou,Yiwen Bi,Gang Yang,Jun Wu,Xiaohong Zhang 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
Heavy oils induced water pollutions are difficult to be eliminated due to the oils located under water. Herein, wefabricated superhydrophobic cellulose film with nanoflower structures via a Facile method to eliminate heavy oil from water. Cellulose films were in-situ modified with Fe2O3 and stearic acid (STA) for superhydrophobic modification. Thecorresponding superhydrophobic cellulose/Fe2O3-STA film has water contact angle of 155.5 º and sliding angle of 5.5 º, andcan maintains its superhydrophobicity when it is immersed in water. The film exists excellent self-cleaning property, and thedusts on the film could be easily swept away by running water drops. The film was further applied to separate heavy oil/watermixture with separation efficiency of 99.37 %, and the separation efficiency was maintained after 20 separation cycles aswell. The film can also be utilized to absorb small heavy oil drops under water. Thus, we not only develop a simple way toproduce superhydrophobic cellulose based films, but also provide superhydrophobic materials to solve water pollutioncaused by heavy oil.