http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Hong Ding (검색결과 155 건)
- 무료
- 기관 내 무료
- 유료
-
Soldering 6061 Al by Sn9Zn Coating With/Without Two Step Ultrasonic Effect
Hao Hong,Ding Min 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.8
The work described the effect of soldering 6061 Al by soldering coating with/without two step ultrasonic process, basedon Sn9Zn alloy prepared by high frequency melting and rapid solidification. The microstructure, interfacial morphology,shear strength and mechanical morphology of 6061 aluminum alloy soldered joints were compared and analyzed. Theresults showed that the ultrasonic soldering with coating by two step ultrasonic process technology could greatly improvethe morphology of the joints and refine the grain size. The solder layer with larger scallop shape was transformed into adense fine structure. After two step ultrasonic effect, the width of the joint was about 28% higher than that under the firstultrasonic process. The Zn-rich phase length decreased from an average of 90 μm to an average of 25 μm, about 27% of theoriginal length. The refinement of solder seam was related to the additional dissolved Al and IMC particles. The refinementmechanism was mainly sono-crystallization + sono-fragmentation with two step ultrasonic effect, which was different fromthe refinement mechanisms of the first ultrasonic effect with sono-crystallization. At the same time, the shear strength of6061 aluminum alloy joints bonded at low temperature could reach 230 MPa by two step ultrasonic effect. Compared withthe ultrasonic soldering with coating, the hardness and maximum strength were improved by 14.5% and 28%, respectively.
-
Hao Hong,Ding Min 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.8
To meet the growing demand of technologies of high performance electronics, nano-solders have been widely developed. In the present study, Sn-Zn nano-amorphous particles with core–shell structure were synthesized by a chemical reductionmethod with NaBH4 as reduction agent and Polyvinylpyrrolidone (PVP) as a stabilizer. The size distribution and thermalbehaviour of the as-synthesized nano-particles were controlled by the amount of PVP, whose concentration ranged from 3to 30 wt%. And the change was comparatively confirmed by TEM, DSC and XRD analysis. The results revealed that PVPconcentrations can not only regulate and control the size distribution of the nano-particles and the melting point, whichcould also change the ratio of amorphous shell to crystalline core in nanostructures. In addition, sintering behavior of thisnano-solder soldering 6061 aluminum alloys and its corresponding mechanical properties were evaluated based on SEM,XRD and the shear tests. The results turned out the best bonding quality was obtained under the condition of the content ofPVP is 10 wt%. The obtained shear strength was as high as 17.6 MPa, and the elemental composition of the thinner IMClayer was Al2Zn3,which revealed a good solderability property. The above analysis provided a new insight into the effects ofPVP content on the interfacial reaction mechanism. This bonding technology was suitable for the electronic devices bondedat low temperature.
-
Ding, Hong-Sheng,Lee, Jung-Moo,Lee, Bup-Ro,Kang, Suk-Bong,Nam, Tae-Hyun Elsevier 2007 Materials science & engineering. properties, micro Vol.444 No.1
<P><B>Abstract</B></P><P>TiNi shape memory alloy (SMA) thin sheets with a thickness of 120μm were fabricated by the method of bonding and cold rolling and subsequent heat treatment of elemental Ti and Ni foils. The annealing temperature and time have been investigated with regard to their effects on the phase composites and microstructures of the as-roll-bonded Ti/Ni multilayers. It is found that the TiNi phase which shows shape memory effect is easily to be synthesized by the subsequent heat treatment even though it was preformed by annealing at a relatively low temperature of 650°C and for a short time of 6h. The shape memory effect has been examined by DSC for the fabricated TiNi thin sheets and it reveals a good martensitic and reverse transformation behavior from B2 to B19′ of <I>M</I><SUB>s</SUB> at around 60°C and transition hysteresis of about 30°C. A tensile test at the temperature above <I>A</I><SUB>f</SUB> revealed that recovery strains of average 1.5% in superelasticity has been obtained for the TiNi thin sheets.</P>
-
( Ding Hong Lei ),( Hao Zeng ),( Lin Ping Huang ),( Yan Dong Dong ),( Yi Jun Duan ),( Xu Hu Mao ),( Gang Guo ),( Quan Ming Zou ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.10
Most of the Helicobacter pylori strains containing the cag pathogenicity island (PAI) have been associated with more severe gastric disease in infected humans. The cag PAI is composed of 27 proteins, and some of the components are required for CagA translocation into host cells as well as induction of proinflammatory cytokines, such as interleukin-8 (IL-8); however, the exact function of most of the components remains unknown or poorly characterized. In this study, we demonstrated that CagT (HP0532), which is an essential structural component of the cag PAI apparatus, plays an important role in the translocation of CagA into host epithelial cells. In addition to being located on the bacterial surface, CagT is also partially localized in the inner membrane, where it acts as a chaperone-like protein and promotes CagA translocation. However, CagT secretion was not detected by immunoprecipitation analysis of cell culture supernatants. Meanwhile, CagT was related to the introduction of IL-8 of the host cell. These results suggest that CagT is expressed on both the inner and outer bacterial membranes, where it serves as a unique type IV secretion system component that is involved in CagA secretion and cag PAI apparatus assembly.
-
Ding, Yuling,Kim, So Hui,Lee, Jeong Jun,Hong, Jin Tae,Kim, Eun-A,Kang, Do-Hyung,Heo, Soo-Jin,Lee, Seung-Hong The Korean Society of Phycology 2019 ALGAE Vol.34 No.2
Ecklonia cava is popular in Korea as a marine functional materials. E. cava is generally collected and used on the coast of Jeju Island. However, the continuous use of collected natural E. cava may be limited because difficult to secure throughout the year and may be exposed to environmental pollution. Jeju magma seawater (MSW) was known to be significant advantages such as safety, cleanness, stability, and functional improvement. Attempts have been reported on application of MSW to the culturing of macro- and microalgae and showed improved results. Thus, the objective of the present study was to explore the anti-melanogenesis activity of brown seaweed E. cava (E. cava cultured with MSW [MSWE]) extract cultured in tanks with MSW of Jeju Island to evaluate the possibility of cosmeceutical industrial application. MSWE extract showed the higher polyphenolic and dieckol contents than natural E. cava (NE) extract. Anti-melanogenesis activity of MSWE extract and NE extract are tested and compared using tyrosinase and dihydroxyphenylalanine (DOPA) oxidation inhibition assay. MSWE extracts evidenced more effective tyrosinase and DOPA oxidation inhibition activity than that of the NE extracts and the commercial whitening agent, arbutin. MSWE extracts also markedly inhibited melanin synthesis and decreased the expression of melanogenesis-related protein in ${\alpha}$-melanocyte stimulating hormone-stimulated B16F10 melanoma cells without cytotoxicity. These results suggest that MSW cultivation process would be more effective in releasing bioactive compounds with whitening effect from seaweed such as E. cava at an industrial scale.
-
Ding, Xiu-Ping,Zhang, Jian,Li, Bao-Sheng,Li, Hong-Sheng,Wang, Zhong-Tang,Yi, Yan,Sun, Hong-Fu,Wang, Dong-Qing Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.1
Objective: To explore the feasibility of shrinking field technique after 40 Gy radiation through 18F-FDG PET/CT during treatment for patients with stage III non-small cell lung cancer (NSCLC). Methods: In 66 consecutive patients with local-advanced NSCLC, 18F-FDG PET/CT scanning was performed prior to treatment and repeated after 40 Gy. Conventionally fractionated IMRT or CRT plans to a median total dose of 66Gy (range, 60-78Gy) were generated. The target volumes were delineated in composite images of CT and PET. Plan 1 was designed for 40 Gy to the initial planning target volume (PTV) with a subsequent 20-28 Gy-boost to the shrunken PTV. Plan 2 was delivering the same dose to the initial PTV without shrinking field. Accumulated doses of normal tissues were calculated using deformable image registration during the treatment course. Results: The median GTV and PTV reduction were 35% and 30% after 40 Gy treatment. Target volume reduction was correlated with chemotherapy and sex. In plan 2, delivering the same dose to the initial PTV could have only been achieved in 10 (15.2%) patients. Significant differences (p<0.05) were observed regarding doses to the lung, spinal cord, esophagus and heart. Conclusions: Radiotherapy adaptive to tumor shrinkage determined by repeated 18F-FDG PET/CT after 40 Gy during treatment course might be feasible to spare more normal tissues, and has the potential to allow dose escalation and increased local control.
-
-
The optimization for the straight-channel PCHE size for supercritical CO<sub>2</sub> Brayton cycle
Xu, Hong,Duan, Chengjie,Ding, Hao,Li, Wenhuai,Zhang, Yaoli,Hong, Gang,Gong, Houjun Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.6
Printed Circuit Heat Exchanger (PCHE) is a widely used heat exchanger in the supercritical carbon dioxide (sCO<sub>2</sub>) Brayton cycle because it can work under high temperature and pressure, and has been a hot topic in Next Generation Nuclear Plant (NGNP) projects for use as recuperators and condensers. Most previous studies focused on channel structures or shapes. However, no clear advancement has so far been seen in the allover size of the PCHE. In this paper, we proposed an optimal size of the PCHE with a fixed volume. Two boundary conditions of PCHE were simulated, respectively. When the volume of PCHE was fixed, the heat transfer rate and pressure loss were picked as the optimization objectives. The Pareto front was obtained by the Multi-objective optimization procedure. We got the optimized number of PCHE channels under two different boundary conditions from the Pareto front. The comprehensive performance can be increased by 5.3% while holding in the same volume. The numerical results from this study can be used to improve the design of PCHE with straight channels.
-
Study on the Decoupling Effects of Carbon Emission in Shandong Tourism
Tian, Hong,Sun, Fengzhi,Ding, Changan 한중경제문화학회 2015 한중경제문화연구 Vol.5 No.-
With the depth research in global climate change and the rapid development of tourism industry, tourism industry has been paid more and more attention to carbon emissions. Shandong Province is a major tourism province, the tourism industry not only has the high speed development, but also has expanded each year, the issue of tourism carbon emissions has become one of the important problems to be solved. By using Tapio model to analyze the decoupling relationship between economic growth and carbon emissions in Shandong Province tourism during 2000-2013, and decomposed the total decoupling indicator into the energy saving decoupling indicator and emission reduction decoupling indicator to study, the results showed that: the decoupling relationship between economic growth and carbon emissions in Shandong Province tourism was mainly weak decoupling, energy saving decoupling indicator was the main influence factor of the total decoupling indicators being weak decoupling state, emissions reduction decoupling indicator showed a weak influence on the total decoupling indicators being weak decoupling state. When Shandong Province develop the low-carbon tourism, efforts should be made to create a good institutional environment, to increase research and development of low carbon technology, to improve the level of low-carbon tourism facilities, to optimize energy consumption structure, to increase the proportion of the use of low carbon energy.
-
Yadan Ding,Dan Xu,Hong Shao,Tie Cong,Xia Hong,Huiying Zhao 한국섬유공학회 2019 Fibers and polymers Vol.20 No.10
SiO2/polystyrene porous micro/nanofibers with superhydrophobic and superoleophilic properties were preparedby facile electrospinning method. The spindle-beads-on-string structured fibers were found to be more hydrophobic thanthose without the beads. The doping of nano-SiO2 endowed the fibers with porous structure, and thus further increased thewater contact angle from 139 o to 153 o. Simultaneously, the oil contact angle of 0 o was obtained. The superhydrophobicsuperoleophilicmicro/nanofibers could selectively absorb oil from water within eight seconds. The oil sorption processfollowed pseudo-first order kinetic model. The absorption mechanism was proved to be physical encapsulation by Fouriertransform infrared technique. The maximum sorption capacity for highly viscous silicone oil was up to 122.7 g/g. It is higherthan many recently reported values. The porous micro/nanofibers exhibit significant value in oil-water separation.
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
