Search

Your search keyword '"Wang QiangSheng"' showing total 49 results
Start Over Author "Wang QiangSheng"
49 results on '"Wang QiangSheng"'

11. Research on porous titanium implants and its animal experiments

Author

Yao Chunyan, Kaijie Fu, Chen Dongdong, Zheng Zhongli, and Wang Qiangsheng

Subjects
Materials science, Mechanical Engineering, 030206 dentistry, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, Industrial and Manufacturing Engineering, Osseointegration, 03 medical and health sciences, Surface coating, 0302 clinical medicine, Coating, engineering, Hydroxyapatite coating, Implant, 0210 nano-technology, Porosity, Dental alveolus, Porous titanium, Biomedical engineering
Abstract

Purpose The purpose of this study is to obtain an effective implant with porous structures on its surface, named porous-surfaced implant, which helps to improve the overall stability of the implant and promote the combination of implant and alveolar bone. Design/methodology/approach Porous-surfaced implants with a porosity of 16%, 21%and 32% were designed and the effect of porosity on the strength of the implant was analyzed by ABAQUS software. Porous-surfaced implants with different porosity were printed by selective laser melting and the surface morphology was observed. Animal experiments of implants with porous structures and coating were carried out in healthy beagle dogs. The experimental group was treated with hydroxyapatite coating and the control group was not treated. Bone volume (BV) and total volume (TV) of the implant surface of the experimental group and control group were calculated by Skyscan CTvol software. Findings With the increase of porosity of porous-surfaced implants, the neck stress of the porous-surfaced implants increased and their strength decreased. In addition, in animal vivo experiments, the ratio value of BV to TV of the porous-surfaced implants was between 55.38% and 79.86%, which was the largest when the porosity of porous-surfaced implants was 16%. The internal and surrounding bone formation content of porous-surfaced implants with hydroxyapatite coating was higher than porous-surfaced implants without coating. Originality/value The results of this study show that the pores on the surface of implants can be filled with the new bone and porous-surfaced implants with 16% porosity provide better space for the growth of new bone. The porous structures with hydroxyapatite coating are beneficial to the growth of new bone around implants. The results of this study are helpful to improve the overall stability of implants and to promote the combination of implant and alveolar bone.

Published
2020

15. 圆形杂质对裂纹扩展的影响

Author

XING Shuaibing, null 邢帅兵，王强胜，生月，江晓禹, WANG Qiangsheng, SHENG Yue, and JIANG Xiaoyu

Subjects
Applied Mathematics, Mechanical Engineering
Published
2019

20. Study on nano silicon carbide water-based cutting fluid in polysilicon cutting

Author

Yunfeng Liu, Chen Dongdong, Yao Chunyan, Zheng Zhongli, Wang Qiangsheng, and Kaixiang Xu

Subjects
010302 applied physics, Materials science, Mechanical Engineering, Diamond, 02 engineering and technology, Edge (geometry), engineering.material, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Carbide, Breakage, Mechanics of Materials, 0103 physical sciences, Lubrication, Surface roughness, engineering, General Materials Science, Wafer, Cutting fluid, Composite material, 0210 nano-technology
Abstract

Diamond wire sawing technology is widely used in polysilicon cutting. The poor lubrication performance of the common water-based cutting fluid results in many cutting grooves and kerfs on wafer surface, which increases the difficulty of subsequent processing. In this paper, the application of nanoparticles water-based cutting fluid in polysilicon diamond wire sawing was proposed to further improve surface quality of wafers. A novel water-based cutting fluid was prepared with nano silicon carbide (N–SiC), polyethylene glycol (PEG2000) and sodium carboxymethylcellulose (CMC-Na). The dispersibility and friction performance of N–SiC cutting fluid were studied. And then the cutting performance of cutting fluid with different N–SiC content was investigated. Research results show that the dispersibility and friction performance of cutting fluid with 0.2 wt% N–SiC, 0.5 wt% CMC-Na and 6 wt% PEG2000 are the best. N–SiC particles can effectively reduce the width of edge breakage and the surface roughness of polysilicon wafers. The width of edge breakage and the surface roughness reach the lowest value when the N–SiC content in the cutting fluid is 0.2 wt%.

Published
2021

22. Characteristics of Uptake of Nitrogen, Phosphorus, and Potassium and Partitioning in Mechanical Transplanting Japonica Rice

Author

Yang JuanJuan, Xu JingJing, Li GangHua, Yu Linhui, Ding YanFeng, Liu ZhengHui, Wang QiangSheng, Ling QiHong, and Wang Shaohua

Subjects
Potassium, Crop yield, Phosphorus, chemistry.chemical_element, Plant Science, Nitrogen, Nitrogen phosphorus, Japonica rice, chemistry, Agronomy, Transplanting, Agronomy and Crop Science, Plant nutrition, Biotechnology
Published
2013

24. Characteristics of substance and energy in rice-duck-azollaintegrated farming system

Author

Wang QiangSheng, Zheng JianChu, Zhou JianTao, Bian XinMin, He JiaJun, and Zhen RuoHong

Subjects
Ecology, biology, Agroforestry, Integrated farming, Potassium, Phosphorus, Soil Science, chemistry.chemical_element, Dusk, Plant Science, Azolla, biology.organism_classification, Nitrogen, Food chain, chemistry, Agronomy, Environmental science, Cycling, Agronomy and Crop Science, Ecology, Evolution, Behavior and Systematics
Published
2009

48. Effect of Low Molecular Weight Organic Anions on the Adsorption of NO3- by Variable Charge Soils

Author

Xu, Renkou, Yang, Mali, Wang, Qiangsheng, and Ji, Guoliang

Abstract

Low molecular weight organic acids exist widely in soils and have been implicated in many soil processes. The results in the present paper showed that the presence of organic anions led to a decrease in the adsorption of NO3-. The effect of citrate was much larger than that of oxalate and malate. Among different soils, the effect for Hyper-Rhodic Ferralsol and Rhodic Ferralsol was larger than that for Haplic Acrisol, which was related to the content of iron oxides in these soils. The effect of organic anions decreased with the increases in pH value and the amount of organic anions added. The organic anions depressed the adsorption of NO3- through two mechanisms, the competition of the organic anions for adsorption sites with NO3- and the change of soil surface charge caused by the specific adsorption of organic anions.

Published
2005
Full Text
View/download PDF

49. [Effect of rice-duck mutualism on nutrition ecology of paddy field and rice quality].

Author

Wang Q, Huang P, Zhen R, Jing L, Tang H, and Zhang C

Subjects
Animals, Ducks physiology, Insecta physiology, Nitrogen analysis, Oryza metabolism, Oryza parasitology, Phosphates analysis, Plant Diseases parasitology, Potassium analysis, Time Factors, Water analysis, Ducks growth & development, Ecosystem, Oryza growth & development, Soil analysis
Abstract

The production of nuisanceless rice was conducted by the technique of rice-duck mutualism without applying any pesticide and chemical fertilizer. The results showed that compared to the control, the effect of eliminating weeds was over 99.4%, and the cardinal numbers of plant diseases and insect pests reduced obviously. Nutrients and dissolved oxygen in paddy water and rapidly available nutrients in soil increased, but after maturing stage, compared to basal fertility, rapidly available P and K decreased. The N, P, and K absorption amounts of rice plant, rice yield, setting panicles rate, filled grains and ripened rate increased. The milling, appearance, nutritional, cooking and eating quality of rice improved, especially in reducing chalkiness. The comprehensive benefits of paddy field enhanced obviously.

Published
2004

Catalog

Books, media, physical & digital resources
See catalog results