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Your search keyword '"Zhao, Hai-Long"' showing total 158 results
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158 results on '"Zhao, Hai-Long"'

8. Massless Neutrino Oscillations via Quantum Tunneling

Author

Zhao, Hai-Long

Subjects
Physics - General Physics, High Energy Physics - Phenomenology
Abstract

In the present theory, the masses of neutrinos are required in order to realize oscillations. By analogy with the oscillation of quantum two-state system, we assume that neutrino oscillations may be regarded as quantum tunneling process. The difference of the quantum numbers between two particles may build a barrier. Thus neutrinos with vanishing mass will oscillate. The hypothesis can also be applied to the lepton flavor violation and quark mixing as well as the oscillation of neutral kaons. We point out that quark mixing is the consequence of quark oscillations via barrier tunneling in hadrons as bound states, while neutrinos oscillate as free particles. We expect that the recent experimental results on anomalous magnetic moment of the muon and the breaking of lepton universality in beauty-quark decays will be explained with flavor-changing via barrier tunneling instead of introducing new interactions and particles., Comment: 9 pages, 1 figure

Published
2015

10. Explanation of Superluminal Phenomena Based on Wave-Particle Duality and Proposed Optical Experiments

Author

Zhao, Hai-Long

Subjects
Quantum Physics, Physics - Optics
Abstract

An explanation for superluminal phenomena based on wave-particle duality of photons is suggested. A single photon may be regarded as a wave packet, whose spatial extension is its coherence volume. As a photon propagates as a wave train in vacuum, its velocity is just the speed of light. When it tunnels through a barrier as a particle, its wave function collapses and it will travel faster than light. Superluminal motion can occur only within the coherence length and the time constrained by uncertainty principle. A massive particle cannot be superluminal during the tunneling process. So superluminality does not violate causality. As for the superluminal and negative group velocities in anomalously dispersive medium, they are merely reshaping effect of the pulse, and they will become subluminal at large distances. A couple of experiments are proposed to test the superluminal phenomena., Comment: 15 pages, 9 figures

Published
2014

11. On the Implication of Bell's Probability Distribution and Proposed Experiments of Quantum Measurement

Author

Zhao, Hai-Long

Subjects
Physics - General Physics, Quantum Physics
Abstract

In the derivation of Bell's inequalities, probability distribution is supposed to be a function of only hidden variable. We point out that the true implication of the probability distribution of Bell's correlation function is the distribution of the joint measurement outcomes on the two sides. So it is a function of both hidden variable and settings. In this case, Bell's inequalities fail. Our further analysis shows that Bell's locality holds neither for dependent events nor for independent events. We think that the measurements of EPR pairs are dependent events, thus violation of Bell's inequalities cannot rule out the existence of local hidden variable. In order to explain the results of EPR-type experiments, we suppose that polarization entangled photon pair can be composed of two circularly or linearly polarized photons with correlated hidden variables, and a couple of experiments of quantum measurement are proposed. The first uses delayed measurement on one photon of the EPR pair to demonstrate directly whether measurement on the other could have any non-local influence on it. Then several experiments are suggested to reveal the components of polarization entangled photon pair. The last one uses successive polarization measurements on a pair of EPR photons to show that two photons with a same quantum state will behave in the same way under the same measuring condition., Comment: 15 pages, 9 figures

Published
2009
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12. Locally Lorentz-Covariant Theory of Gravity Founded on Inertial Frame of Center of Mass

Author

Zhao, Hai-Long

Subjects
General Relativity and Quantum Cosmology
Abstract

A Locally Lorentz-covariant theory of gravity which is equivalent to general relativity in weak gravitational field is present. The space-time standard in local gravitational field is modified in terms of equivalence principle to keep consistent with that of inertial frame. The static metric in our theory agrees with Schwarzschild metric at first order approximation. The gravitational vector potential produced by a moving body is obtained by applying local Lorentz transformations in gravitational field. On the other hand, we still regard inertial frame, i.e. center of mass of the system, as the preferred frame of reference. This is because Newton's laws of motion hold only for inertial frames. The apsidal motion of binary system and the expansion of the universe can be explained reasonably when observed from inertial frame. Black holes and singularities do not exist in our theory., Comment: 16 pages, 2 figures

Published
2005

14. Quantum mechanical calculation of electron spin

Author

Zhao Hai-Long

Subjects
electron spin, wave function, anomalous magnetic moment, divergence of self-energy, hierarchy problem, 03.65.ge, 11.10.gh, Physics, QC1-999
Abstract

The classical and quantum mechanical methods are used respectively to calculate the electron spin. It is shown that the classical method cannot derive the correct magnetic moment value. Assuming that the rest energy of the electron originates from the kinetic energy of the virtual particles, the electron spin motion equation and spin wave function can be derived. In the case of the quantum numbers of spin angular momentum and magnetic moment being 1/2 and 1 respectively, their correct values can be obtained. In the meanwhile, the anomalous magnetic moment is evaluated based on the wave function of the spinning electron. Suppose the probability of virtual photons converting into electron-positron pairs to be 0.00141, the result agrees with that of quantum electrodynamics. Given that the energy of the virtual photon obeys the classical Maxwell-Boltzmann distribution, the self-energy of the electron will be finite. In addition, the hierarchy problem can be solved with the same hypothesis.

Published
2017
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22. Transcriptome approach to understand the potential mechanisms of resistant and susceptible alfalfa (Medicago sativa L.) cultivars in response to aphid feeding

Author

Zhao Hai-long, Tu Xiongbing, and Zhang Ze-hua

Subjects
0301 basic medicine, alfalfa cultivar resistance, Agriculture (General), Plant Science, Biology, Biochemistry, S1-972, Transcriptome, 03 medical and health sciences, chemistry.chemical_compound, Food Animals, Botany, Cultivar, Plant breeding, KEGG, Ecology, Phenylpropanoid, Jasmonic acid, fungi, food and beverages, transcriptomic, aphids, 030104 developmental biology, Flavonoid biosynthesis, chemistry, Animal Science and Zoology, molecular mechanism, Agronomy and Crop Science, Salicylic acid, Food Science
Abstract

Plant breeding for resistance to agricultural pests is an essential element in the development of integrated crop management systems, however, the molecular and genetic mechanisms underlying resistance are poorly understood. In this pilot study, we conducted a transcriptomic analysis of a resistant (R) and susceptible (S) variety of alfalfa, with (+A) or without (–A) aphids (totally four treatments). We used the resistant cultivar Zhongmu 1 and the susceptible cultivar Soca. A total of 3 549 mRNAs were differentially expressed, of which 1 738 up-regulated and 1 307 down-regulated genes were identified in S+A/S–A plants, while 543 up-regulated and 331 down-regulated genes were identified in the R+A/R–A plants. KEGG analysis mapped 112 and 546 differentially expressed genes to 8 and 17 substantially enriched pathways for Zhongmu 1 and Soca, respectively. Six shared pathways were linked to plant resistance traits, including phenylpropanoid biosynthesis associated with salicylic acid synthesis, and linoleic acid metabolism associated with both jasmonic acid and flavonoid biosynthesis. Ultimately, we proposed a preliminary regulatory mechanism of alfalfa cultivar resistance response to aphids feeding based on transcriptome analyses and published documents.

Published
2018

30. Exploring the relationship of peripheral total bilirubin, red blood cell, and hemoglobin with blood pressure during childhood and adolescence

Author

Chen, Xiao-tian, Yang, Song, Yang, Ya-ming, Zhao, Hai-long, Chen, Yan-chun, Zhao, Xiang-hai, Wen, Jin-bo, Tian, Yuan-rui, Yan, Wei-li, and Shen, Chong

Subjects
Erythrocyte, Bilirrubina, Hemoglobina, Pressão arterial, Eritrócito, Blood pressure, Bilirubin, Hemoglobin
Abstract

Objective: Total bilirubin is beneficial for protecting cardiovascular diseases in adults. The authors aimed to investigate the association of total bilirubin, red blood cell, and hemoglobin levels with the prevalence of high blood pressure in children and adolescents. Methods: A total of 3776 students (aged from 6 to 16 years old) were examined using cluster sampling. Pre-high blood pressure and high blood pressure were respectively defined as the point of 90th and 95th percentiles based on the Fourth Report on the Diagnosis, Evaluation, and Treatment of High Blood Pressure in Children and Adolescents. Both systolic and diastolic blood pressure were standardized into z-scores. Results: Peripheral total bilirubin, red blood cell and hemoglobin levels were significantly correlated with age, and also varied with gender. Peripheral total bilirubin was negatively correlated with systolic blood pressure in 6- and 9-year-old boys, whilst positively correlated with diastolic blood pressure in the 12-year-old boys and 13- to 15-year-old girls (p < 0.05). Higher levels of red blood cell and hemoglobin were observed in pre-high blood pressure and high blood pressure students when compared with their normotensive peers (p < 0.01). The increases in red blood cell and hemoglobin were significantly associated with high blood pressure after adjusting for confounding factors. The ORs (95% CI) of each of the increases were 2.44 (1.52-3.92) and 1.04 (1.03-1.06), respectively. No statistical association between total bilirubin and high blood pressure was observed (p > 0.05). Conclusion: Total bilirubin could be weakly correlated with both systolic and diastolic blood pressure, as correlations varied with age and gender in children and adolescents; in turn, the increased levels of red blood cell and hemoglobin are proposed to be positively associated with the prevalence of high blood pressure. Resumo Objetivo: A bilirrubina total é benéfica para proteger contra doenças cardiovasculares em adultos. Nosso objetivo foi investigar a associação dos níveis de bilirrubina total, glóbulos vermelhos e hemoglobina com a prevalência de pressão arterial elevada em crianças e adolescentes. Métodos: Um total de 3.776 estudantes (com idade entre 6-16 anos) foram examinados utilizando uma amostra em blocos. A pressão arterial elevada anterior e a pressão arterial elevada foram definidas como o 90° e 95° percentil, respectivamente, com base nos critérios do Quarto Relatório sobre Diagnóstico, Avaliação e Tratamento da Pressão Arterial elevada em Crianças e Adolescentes. A pressão arterial sistólica e pressão arterial diastólica foram padronizadas no escore z. Resultados: Os níveis periféricos de bilirrubina total, glóbulos vermelhos e hemoglobina foram significativamente correlacionados à idade, que também variou de acordo com o sexo. A bilirrubina total periférica apresentou uma correlação negativa com a pressão arterial sistólica em meninos com 6 e 9 anos, ao passo que apresentou uma correlação positiva com a pressão arterial diastólica em meninos de 12 anos e meninas de 13 a 15 anos (p < 0,05). Foram observados níveis mais elevados de glóbulos vermelhos e hemoglobina em estudantes com pressão arterial elevada anterior e pressão arterial elevada em comparação a indivíduos normotensos (p < 0,01). Os aumentos de glóbulos vermelhos e hemoglobina tiveram uma associação significativa com a pressão arterial elevada após ajuste dos fatores de confusão. As RC (IC de 95%) de cada um dos aumentos foram 2,44 (1,52-3,92) e 1,04 (1,03-1,06) respectivamente. Não foi observada nenhuma associação estatística entre o nível de bilirrubina total e a pressão arterial elevada (p > 0,05). Conclusão: A bilirrubina total pode ter correlações fracas com a pressão arterial sistólica e a pressão arterial diastólica, variando de acordo com a idade e o sexo em crianças e adolescentes, enquanto isso, propõe-se que o aumento dos níveis de glóbulos vermelhos e hemoglobina está positivamente associado à prevalência de pressão arterial elevada.

Published
2018

34. Investigation on dynamic effects of frame with specially shaped columns subjected to column failure

Author

Wang, Tie-cheng, Chen, Qing-wei, Zhao, Hai-long, Zhang, Lei, Wang, Tie-cheng, Chen, Qing-wei, Zhao, Hai-long, and Zhang, Lei

Abstract

Dynamic effects caused by sudden failure of the vertical load-bearing component are an important factor affecting the progressive collapse of building. In order to study the influence of dynamic effects on structure, a collapse experiment of a 1/3-scale, 2×3-bay and 2-story reinforced concrete frame with specially shaped columns with sudden column removal were carried out. The displacement response, reinforcement and concrete strains during the collapse of the frame were studied to reveal the dynamic response of structure such as deformation and internal force redistribution. Experimental results show that the influence of dynamic effects on structure at the moment of component failure was not significant. The structure was still in the elastic stage and collapse did not occur, indicating that reinforced concrete frame designed according to Chinese codes has a good behavior against progressive collapse caused by sudden loss of a first floor column. A progressive collapse dynamic analysis model was established using the alternate path method based on the test frame, and the relationship between the dynamic amplification factors and failure time were derived. Transient time history analysis was carried out on the finite element model of experimental frame using OpenSees to obtain the variation of dynamic amplification factor with the failure time.

Published
2015

35. Transcriptome approach to understand the potential mechanisms of resistant and susceptible alfalfa (Medicago sativaL.) cultivars in response to aphid feeding

Author

TU, Xiong-bing, ZHAO, Hai-long, and ZHANG, Ze-hua

Abstract

Plant breeding for resistance to agricultural pests is an essential element in the development of integrated crop management systems, however, the molecular and genetic mechanisms underlying resistance are poorly understood. In this pilot study, we conducted a transcriptomic analysis of a resistant (R) and susceptible (S) variety of alfalfa, with (+A) or without (–A) aphids (totally four treatments). We used the resistant cultivar Zhongmu 1 and the susceptible cultivar Soca. A total of 3 549 mRNAs were differentially expressed, of which 1 738 up-regulated and 1 307 down-regulated genes were identified in S+A/S–A plants, while 543 up-regulated and 331 down-regulated genes were identified in the R+A/R–A plants. KEGG analysis mapped 112 and 546 differentially expressed genes to 8 and 17 substantially enriched pathways for Zhongmu 1 and Soca, respectively. Six shared pathways were linked to plant resistance traits, including phenylpropanoid biosynthesis associated with salicylic acid synthesis, and linoleic acid metabolism associated with both jasmonic acid and flavonoid biosynthesis. Ultimately, we proposed a preliminary regulatory mechanism of alfalfa cultivar resistance response to aphids feeding based on transcriptome analyses and published documents.

Published
2018
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39. Structural dynamic response analysis on structure under tsunami bore impact

Author

Wang, Tie Cheng, Meng, Tao, Zhao, Hai Long, Wang, Tie Cheng, Meng, Tao, and Zhao, Hai Long

Abstract

The forefront of the tsunami bore has extremely strong turbulent intensity, vorticity, and impact force. It generates tremendous impact effect on the coastal structures, which is the direct reason of the damage and destruction of the structures. On the basis of the computational fluid dynamic theory, this paper applied fluid volume method to capture the free surface motion of the tsunami waves and developed a 3D wave numerical model of an experiment of dam-break tsunami bore impact on a structure. The effectiveness of the model was also validated. The model was then applied to numerically analyze the dynamic impact effect of a tsunami bore on the structure of a full-scale reinforced concrete frame. It resolved the dynamic impact force of the tsunami bore on the structure and their interaction process. This study also employed finite element analysis to compare the static and dynamic response of the frame structure under the impact effect of the tsunami bore. The structural vibration characteristic and dynamic magnification factor of the structure under tsunami bore impact are confirmed, which could provide a reference for the design of anti-tsunami buildings.

Published
2014

41. Research of text clustering based on fuzzy granular computing

Author

Xu Mingzhu, Zhang Xia, Zhao Hai-long, and Yin Yixin

Subjects
Fuzzy classification, Theoretical computer science, Fuzzy clustering, Computer science, Fuzzy set, Correlation clustering, Fuzzy number, FLAME clustering, Fuzzy set operations, Data mining, computer.software_genre, Cluster analysis, computer
Abstract

The typical algorithm of text clustering is a “Hard Partition” one, Actually, Chinese text is better to treat with “Soft Partition” for its diversity and largeness. The fuzzy-set theory supply a powerful analyzing tool to this “Soft partition”. Traditional fuzzy text clustering methods mostly are getting the fuzzy equivalent matrix or fuzzy division by iterating the matrix of membership degree, huge storage space is necessary for that process. The text clustering based on fuzzy granular computing will work as: first provide a normalized distance function in the fuzzy granularity space of text set, then use the function to do a dynamic clustering work to text who has a less distance than granularity. Approved by the test, this method has such advantages on reducing the computing complexity and space complexity, suitable for the status that many samples need to be processed.

Published
2009

42. Combining wavelet transform and Orthogonal Centroid Algorithm for ear recognition

Author

Mu Zhichun and Zhao Hai-long

Subjects
Computer science, business.industry, Feature extraction, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Wavelet transform, Pattern recognition, Centroid algorithm, Ear recognition, Linear discriminant analysis, Statistical classification, ComputingMethodologies_PATTERNRECOGNITION, Computer Science::Sound, Computer Science::Computer Vision and Pattern Recognition, Content (measure theory), Computer vision, Artificial intelligence, business, Image retrieval
Abstract

In recent years, automatic ear recognition has become a popular research. Effective feature extraction is one of the most important steps in Content-based ear image retrieval applications. In this paper, a new approach is proposed that the low frequency sub-images are obtained by utilizing two-dimensional wavelet transform and then the features are extracted by applying Orthogonal Centroid Algorithm to the low frequency sub-images. The experimental results on USTB ear database prove that the proposed method can overcome the Small Sample Size problem and get better performance of recognition speed than conventional PCA+LDA algorithm.

Published
2009

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