Advances in Natural Science最新文献

{"title":"Using Genetic Algorithm to Optimize Parameters of Support Vector Machine and Its Application in Material Fatigue Life Prediction","authors":"Lanlan Zhang, Juyang Lei, Qilin Zhou, Yudong Wang","doi":"10.3968/6404","DOIUrl":"https://doi.org/10.3968/6404","url":null,"abstract":"Support vector machine is a new kind of learning method based on solid theoretical foundation, but this method has the characteristic of sensitivity to parameter. According to this characteristic, this paper use genetic algorithm to optimize the parameters of SVM and cross validation is introduced to reduce the dependence of the parameters on the training samples. Through the analysis of fatigue data for the relevant literature, take the parameters of the best generalization ability as the final parameters and apply the obtained model (GA-SVR) in material fatigue life prediction. Compared with the conventional SVR model and PSO-SVR model, the mean square error and the square of correlation coefficient are used to verify the reliability and accuracy of the three models. The results show that, the GA-SVR model can predict the fatigue life of materials with high accuracy.","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72569339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Real Numbers System and Why a Negative Number Times a Negative Number Equals a Positive Number","authors":"B. Beecher","doi":"10.3968/6595","DOIUrl":"https://doi.org/10.3968/6595","url":null,"abstract":"The original purpose of this paper was to provide answers to the question: “Why is a negative number time a negative number equal a positive number”. This concept is one of the most mysterious topics taught in any mathematics classroom. Yet this fundamental mathematical idea is listed in most algebra text books as a rule without any justification for the validity of the rule. While researching this issue it became clear that the decimal place value system, and in particular the real value number system was just as mysterious. Hence the decision was taken to broaden the scope of the paper to include some of the issues associated with the real number system; and to outline some of the topics a mathematics student should be acquainted with.","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80846382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biological Characteristics of Eggshell and Its Bionic Application","authors":"Jian Zhang, Minglu Wang, Weibo Wang, Fei Yan","doi":"10.3968/6364","DOIUrl":"https://doi.org/10.3968/6364","url":null,"abstract":"This paper discusses macro-geometrical, micro-geometrical and biomechanical features of eggshell, and proposes its inspiration for bionic design of submersible pressure hull. The results show that eggshell has excellent bionic performance on the weight-strength ratio, the span-thickness ratio, the aesthetic characteristics, the distribution of material and so on. The  pressure endurance of  the eggshell under uniform pressure is quite remarkable. Bionic design based on eggshell structure can effectively coordinate variable features of deep-sea pressure hull such as strength, stability, reserve buoyancy, streamline shape, space utilization in the crust and occupant comfort.","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74271609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overviews of Investigation on Submersible Pressure Hulls","authors":"Jian Zhang, Z. Xinlong, Weibo Wang, Wenxian Tang","doi":"10.3968/6129","DOIUrl":"https://doi.org/10.3968/6129","url":null,"abstract":"With the exploration of natural resources and the research on oceanography in the deep sea obtained more and more attention, in the recent years, the pressure hull of the submersibles has been widely studied and used in many states. In order to the continuing design and assessment on it effectively, the paper summarizes the design method, the structural feature and the material selection of this object.","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78331065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Protection of High Voltage Transmission Lines of Canada from the Ice by High-Frequency Electromagnetic Waves","authors":"K. William","doi":"10.3968/J.ANS.1715787020120504.1854","DOIUrl":"https://doi.org/10.3968/J.ANS.1715787020120504.1854","url":null,"abstract":"The way of heating the air electricity transmission line by spreading it on a running high-frequency electromagnetic waves, which is to protect the electric power system from ice storm. At the heart of the heating are two physical phenomena: the skin effect and the transformation of radiated energy into heat. Calculated impedance wire line for optimal matching of the generator to the line. The results of the experiment and block diagram of an industrial plant. Key words: Power line; Ice; Electromagnetic waves; Skin effect; Thermal heating; Input impedance; Industrial plants","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83372281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate Change and Global Warming Is Produced by Human Endosymbiotic Archaeal Overgrowth and Methanogenesis","authors":"R. Kurup, P. A. Kurup","doi":"10.3968/6030","DOIUrl":"https://doi.org/10.3968/6030","url":null,"abstract":"ntroduction: The previous reports from this laboratory have demonstrated the existence and growth of endosymbiotic actinidic archaea in human population which has been related to disease states like schizophrenia, autism, metabolic syndrome, cancer, autoimmune disease and degenerations. The overgrowth of endosymbiotic actinidic archaea results in neanderthalisation of humans. The overgrowth of endosymbiotic archaea results from the growth of homo sapien civilization. The homo sapien civilization results in industrialization and production of carbon dioxide, a greenhouse gas. The homo sapien civilization also results in widespread use of electronic devices like mobile phones and internet producing interconnectivity and a globalised world. The resultant low level EMF pollution also results in endosymbiotic archaeal growth. Carbon dioxide is a major greenhouse gas whose effects are long term but moderate. The archaea are methanogenic organisms. Methanogenesis results from the production of methane from carbon dioxide and hydrogen. Methanogenesis can also occur from formate and acetate. Acetate is the end product of carbohydrate, protein and lipid catabolism in humans. The human nutritional sources get metabolically converted to acetate and acetyl CoA which can enter the citric acid cycle and mitochondrial oxidative phosphorylation. The presence of endosymbiotic actinidic archaea results in conversion of acetate to formate and methane. It also results in conversion of the ubiquitous carbon dioxide and hydrogen to methane. Thus the human body due to endosymbiosis by archaea becomes the principal source of methanogenesis. Methane is an important greenhouse gas. The effect of methane is short term as compared to carbon dioxide. Methane being a larger molecule can produce absorption of long range radiation and its global warming potential is 29 times that of carbon dioxide. Thus the principal culprit for global warming and eventual catastrophic extinction of human society is methane produced by human endosymbiotic archaea. The archaeal overgrowth due to global warming can affect ocean beds and lakes. This results in warming of the ocean and instability of methane hydrates in the ocean bed releasing methane. The arctic permafrost decays releasing organic carbon which can be a source of methanogenesis by archaea. The study was conducted to evaluate the growth of actinidic archaea in humans. Materials and Methods: Cytochrome F420 levels were studied in the homo sapien population as well as human populations exhibiting the Neanderthal phenotype. Fifteen cases each of the above mentioned groups were chosen for the study. The blood samples were drawn in the fasting state. Cytochrome F420 was estimated flourimetrically (excitation wavelength 420 nm and emission wavelength 520 nm). The permission from the Ethics Committee of the Institute was obtained for this study. Results: The study showed that there was increased cytochrome F420 levels in the population with","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84919515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spurious Relationship of Long Memory Sequences in Presence of Trends Breaks","authors":"Danshi Zhang, Hao Jin, Danshi Zhang, Wenhua Cao","doi":"10.3968/6210","DOIUrl":"https://doi.org/10.3968/6210","url":null,"abstract":"This article extends the theoretical analysis of spurious relationship and considers the situation where the deterministic components of the processes generating the individual series are long memory sequences with structural changes. Show it by using the ordinary least squares estimator, the t-statistics become divergent and pseudo correlation. However, two long memory time series having change points can produce spurious regression. In the presence of structural change points, confirm the rate of t-statistic tends to infinity increased with the increase in sample size. Numerical simulation results show that when structural changes are a feature of the data, the presence of spurious relationship is unambiguous. And the spurious regression not only depends on long memory indexes, but also for trend of model is also very sensitive.","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77356051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Dynamic and Collision Features of Microscopic Particles Described by the Nonlinear Schrödinger Equation in the Nonlinear Quantum Systems","authors":"X. Pang","doi":"10.3968/J.ANS.1715787020120504.1977","DOIUrl":"https://doi.org/10.3968/J.ANS.1715787020120504.1977","url":null,"abstract":"The dynamic and collision features of microscopic particles described by nonlinear Schrodinger equation are investigated deeply using the analytic and the Runge-Kutta method of numerical simulation. The results show that the microscopic particles have a wave-corpuscle duality and are stable in propagation. When the two microscopic particles are collided, they can go through each other and retain their form after their collision of head-on from opposite directions, This feature is the same with that of the classical particles. However, a wave peak of large amplitude, which is a result of complicated superposition of two solitary waves, occurs in the colliding process. This displays the wave feature of microscopic particles. Therefore, the collision process shows clearly that the solutions of the nonlinear Schrodinger equation have a both corpuscle and wave feature, then the microscopic particles represented by the solutions have a wave-corpuscle duality. Obviously, this is due to the nonlinear interaction b||2. Thus we can determine the nonlinear Schrodinger equation can describe correctly the natures and properties of microscopic particles in quantum systems. Key words: Microscopic particle Schrodinger equation; Wave-corpuscle duality; Nonlinear interaction; Collision; Propagation; Quantum mechanics","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81703777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Charnockite Massifs: Key to Tectonic Evolution of the Eastern Ghats Belt, India, and Its Columbia Connection","authors":"S. Bhattacharya, M. Basei, R. Kar","doi":"10.3968/4571","DOIUrl":"https://doi.org/10.3968/4571","url":null,"abstract":"The Eastern Ghats Granulite Belt, India, with two major lithological associations: charnockites and meta sedimentary granulites, is characterized by polyphase deformation and complex, possibly multiple granulite events. Barring the cratonic margins in the north and west, two distinct crustal domains have been identified: the Eastern Ghats Province (EGP) and Ongole domain, separated by the Godavari graben. These domains also have distinct geochronological record of granulite event: in the EGP the first granulite event has been recorded as between 1.2 and 0.9 Ga; while in the Ongole domain the granulite event is recorded as 1.6 - 1.7 Ga. However, charnockite-massifs in both the domains, interpreted as product of deep crustal anatexis under granulite facies conditions, could provide a link in tectonic evolution of the EGB as a whole. LA-ICP-MS analysis of zircon spot ages of two charnockite massifs reveals vestiges of the1.6 Ga charnockite magmatism in the EGP as identical to that in the Ongole domain. Another charnockite massif in the EGP records concordant zircon spot age of 940 Ma, but single spot age of 990 Ma could indicate a prolonged UHT event. Thus magmatic charnockites of intracrustal melting origin could represent two granulite events, at ca. 1.6 and 1.0 Ga in the Eastern Ghats Belt. Also, accretionary orogenic processes of the Supercontinent Columbia might have encompassed the Eastern Ghats Belt with Australia, Antarctica and Laurentia.","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89274059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis on Influencing Factors on the Fluctuation of Commercial Housing Prices Based on ECM Model: Taking Changsha as an Example","authors":"Liping Chen","doi":"10.3968/6167","DOIUrl":"https://doi.org/10.3968/6167","url":null,"abstract":"Based on the data from Changsha real estate market, this study builds a long-term equilibrium model and a short-term error correction model on the fluctuation of Changsha commercial housing prices. It shows that, GDP, urbanization rate, per capita saving and completed area of housing are the main factors on the fluctuation of Changsha commercial housing prices in the long term, while the influence from the factors of total housing investment, sold area of housing and per capita living area are limited. In short term, the fluctuation of Changsha housing prices has no ability of self-revising, and a real estate bubble is building in the whole market.","PeriodicalId":7348,"journal":{"name":"Advances in Natural Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75611312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}