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Search Results: 1 - 10 of 36911 matches for " Fengyi Zhao "
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Accurate Solution to the Gravitational Bending of Starlight by a Massive Object  [PDF]
Fengyi Huang
Journal of Modern Physics (JMP) , 2017, DOI: 10.4236/jmp.2017.811112
Abstract: An exact solution to the gravitational bending of starlight is derived without resorting to general relativity. The accurate solution can be reduced to the result as obtained by general relativity under special conditions. For objects with a larger mass and a smaller radius, the approximated result as obtained by Schwartzchild’s metric based on general relativity will be invalid. A century-long misunderstanding about the deflection of light by gravity based on the classical theory will also be clarified.
Gravitational Field of Moving Masses with Symmetrical Transformation for Relative Motion  [PDF]
Fengyi Huang
Journal of Modern Physics (JMP) , 2017, DOI: 10.4236/jmp.2017.812125
Abstract: A symmetrical transformation is constructed to analyze the gravitational interactions between two fast moving masses based on the retarded potential without resorting to general relativity. The anomalous precession of the perihelion of orbital stars or planets can be explained with the same results as given by general relativity. By introducing an effective mass for photons, the gravity-induced frequency shift and light deflection in the trajectory by the gravity are derived, which can be reduced to the results based on general relativity under special conditions. The gravity-induced time delay of radar signals and gravitational radiations from binary pulsars are analyzed. The symmetrical transformation between two moving coordinates under zero gravity will also be discussed.
Thermal behaviors and heavy metal vaporization of phosphatized tannery sludge in incineration process

TANG Ping,ZHAO Youcai,XIA Fengyi,

环境科学学报(英文版) , 2008,
Abstract: The high concentration of heavy metal (Cu, Cr, Zn, Pb) in tannery sludge causes severe heavy metal emissions in the process of incineration. In the present investigation, the tannery sludge was treated with 85% phosphoric acid before the incineration process in the tube furnace to control the heavy metal emissions. The thermal behavior and heavy metal vaporization of pre-treated tannery sludge were investigated, and X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were also implemente...
Neutrino Physics with Accelerator Driven Subcritical Reactors
Emilio Ciuffoli,Jarah Evslin,Fengyi Zhao
Physics , 2015,
Abstract: Accelerator driven system (ADS) subcritical nuclear reactors are under development around the world. They will be intense sources of free, 30-50 MeV antimuon decay at rest antimuon neutrinos. These ADS reactor neutrinos can provide a robust test of the LSND anomaly and a precise measurement of the leptonic CP-violating phase delta, including sign(cos(delta)). The first phase of many ADS programs includes the construction of a low energy, high intensity proton or deuteron accelerator, which can yield competitive bounds on sterile neutrinos.
IsoDAR Neutrino Experiment Simulation with Proton and Deuteron Beams
Fengyi Zhao,Yao Li,Chengdong Han,Qiang Fu,Xurong Chen
Physics , 2015,
Abstract: In this paper we consider high-intensity source of electron antineutrinos from the production and subsequent decay of 8Li. It opens a wide range of possible searches for beyond standard model physics via studies of the inverse beta decay interaction. In IsoDAR experiments Lithium 8 is a short lived beta emitter producing a high intensity anti-neutrinos, which is very suitable for making several important neutrino experiments. In this paper we used the GEANT4 program. to simulate neutrino production using proton and deuteron beams. We find that the neutrino production rate is about 3 times from deuteron beam than from proton beam in low energy region.
Incineration mechanisms of tannery sludge andcontrol of heavy metal vaporization during the incineration process
制革污泥焚烧特性及焚烧过程中重金属挥发控制研究

XIA Fengyi,ZHAO Youcai,TANG Ping,
夏凤毅
,赵由才,唐平

环境科学学报 , 2011,
Abstract: 以制革污泥为研究对象进行焚烧处理,并对其燃烧特性进行分析.结果发现,制革污泥燃烧过程中并未出现明显的固定碳燃烧区.同时,将制革污泥与煤粉混合后焚烧,结果显示,制革污泥的比例及挥发分的析出对混合燃料的着火燃烧有显著影响,在低温段(180~450℃),制革污泥比例的增大可提高混合试样的活化性能,且燃烧程度加剧.通过添加CaO、橡胶粉等添加剂,可抑制制革污泥焚烧过程中重金属的挥发,当CaO添加量为3%时,对Zn、Pb、Cu和Cr等重金属的抑制效果最佳,其挥发率分别降低了5.23%、0.90%、5.59%和4.43%;橡胶粉的添加对于金属元素的挥发有一定的影响,但影响程度非常有限.
Effect of Silicon-on-Insulator Substrate on Residual Strain in 3C-SiC Films
Wang Xiaofeng,Huang Fengyi,Sun Guosheng,Wang Lei,Zhao Wanshun,Zeng Yiping,Li Haiou,Duan Xiaofeng,
Wang Xiaofeng
,Huang Fengyi,Sun Guosheng,Wang Lei,Zhao Wanshun,Zeng Yiping,Li Haiou,and Duan Xiaofeng

半导体学报 , 2005,
Abstract: One group of SiC films are grown on silicon-on-insulator (SOI) substrates with a series of silicon-over-layer thickness.Raman scattering spectroscopy measurement clearly indicates that a systematic trend of residual stress reduction as the silicon over-layer thickness decreases for the SOI substrates.Strain relaxation in the SiC epilayer is explained by force balance approach and near coincidence lattice model.
Characterization of a Soluble B7-H3 (sB7-H3) Spliced from the Intron and Analysis of sB7-H3 in the Sera of Patients with Hepatocellular Carcinoma
Weiwei Chen, Peixin Liu, Yedong Wang, Weimin Nie, Zhiwei Li, Wen Xu, Fengyi Li, Zhiping Zhou, Min Zhao, Henggui Liu
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0076965
Abstract: B7-H3 is a recently discovered member of the B7 superfamily molecules and has been found to play a negative role in T cell responses. In this study, we identified a new B7-H3 isoform that is produced by alternative splicing from the forth intron of B7-H3 and encodes the sB7-H3 protein. Protein sequence analysis showed that sB7-H3 contains an additional four amino acids, encoded by the intron sequence, at the C-terminus compared to the ectodomain of 2Ig-B7-H3. We further found that this spliced sB7-H3 plays a negative regulatory role in T cell responses and serum sB7-H3 is higher in patients with hepatocellular carcinoma (HCC) than in healthy donors. Furthermore, we found that the expression of the spliced sb7-h3 gene is higher in carcinoma and peritumor tissues than in PBMCs of both healthy controls and patients, indicating that the high level of serum sB7-H3 in patients with HCC is caused by the increased expression of this newly discovered spliced sB7-H3 isoform in carcinoma and peritumor tissues.
The Death and the Life of Beijing —the History, Present Situation and Strategy of Urban Planning in Beijing
Fengyi LI,Bing WANG
Canadian Social Science , 2011, DOI: 10.3968/j.css.1923669720110703.029
Abstract: the article focus to analysis the problems in the urban planning in Beijing via the planning history, including the protection of places interests, the traffic problems in the centre city and satellite town. Combine some cases of other countries to propose method to solve the present problem. Key words: Beijing; Urban planning; Historical and cultural relic; Traffic problems; Satellite town; Organic evacuation Résumé: L'article tente d'analyser les problèmes de la planification urbaine de la ville Pékin, y compris la protection des vestiges culturel dans les vieux quartiers, le transport aggravant au centre-ville, la déconnection entre les zones satellite et ville et des problèmes de circulation qui en découlent, à travers l'histoire de l'urbanisation de la ville de Pékin. L'auteur a proposé des solutions en étudiant les cas de l'urbanisation dans d'autres pays. Mots-clés: Pékin; Planification urbaine; Centre-ville; Vestiges historiques et culturels; Pression de transport; Satellite; évacuation
Identification of rhizome-specific genes by genome-wide differential expression Analysis in Oryza longistaminata
Fengyi Hu, Di Wang, Xiuqin Zhao, Ting Zhang, Haixi Sun, Linghua Zhu, Fan Zhang, Lijuan Li, Qiong Li, Dayun Tao, Binying Fu, Zhikang Li
BMC Plant Biology , 2011, DOI: 10.1186/1471-2229-11-18
Abstract: A total of 2,566 tissue-specific genes were identified in five different tissues of O. longistaminata, including 58 and 61 unique genes that were specifically expressed in the rhizome tips (RT) and internodes (RI), respectively. In addition, 162 genes were up-regulated and 261 genes were down-regulated in RT compared to the shoot tips. Six distinct cis-regulatory elements (CGACG, GCCGCC, GAGAC, AACGG, CATGCA, and TAAAG) were found to be significantly more abundant in the promoter regions of genes differentially expressed in RT than in the promoter regions of genes uniformly expressed in all other tissues. Many of the RT and/or RI specifically or differentially expressed genes were located in the QTL regions associated with rhizome expression, rhizome abundance and rhizome growth-related traits in O. longistaminata and thus are good candidate genes for these QTLs.The initiation and development of the rhizomatous trait in O. longistaminata are controlled by very complex gene networks involving several plant hormones and regulatory genes, different members of gene families showing tissue specificity and their regulated pathways. Auxin/IAA appears to act as a negative regulator in rhizome development, while GA acts as the activator in rhizome development. Co-localization of the genes specifically expressed in rhizome tips and rhizome internodes with the QTLs for rhizome traits identified a large set of candidate genes for rhizome initiation and development in rice for further confirmation.Rhizomes are horizontal, underground plant stems and the primary energy storage organ of many perennial grass species. As the primary means of propagation and dispersal, rhizomes play a key role in the persistence of many perennial grasses [1]. In agriculture, rhizomes have two contrasting roles. On one hand, strong rhizomes are a desirable trait for many species of turf and forage grasses. On the other hand, strong rhizomes are a negative trait contributing to the competitiveness and
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