AASRI Procedia最新文献

{"title":"Concept of Drive of Sport Techniques in 21 Century","authors":"Konstantin Ivanov , Karlyga Zhilisbaeva","doi":"10.1016/j.aasri.2014.08.004","DOIUrl":"10.1016/j.aasri.2014.08.004","url":null,"abstract":"<div><p>The modern sports techniques (cars, motorcycles, bicycles) is drove in motion with use of transmissions with the controlled variable transfer ratio. The transmission provides variable speed of movement depending on external loading. The modern transmission has the step transfer ratio (4 - 5 steps). At each step the transfer ratio constant, and speed of movement is regulated by change of engine power. Achievement of the maximum speed of movement demands optimum control of switching of steps and the engine power.</p><p>Control of steps switching (both manual, and automatic) almost always is not the best. The moment of switching either lags, or advances optimum time of switching which depends on controlled power of the engine. Therefore achievement of the maximum speed of movement substantially depends on individual abilities of the driver. But even the big practical experience of the driver does not allow receiving the greatest possible result.</p><p>The ideal variant for a drive of sports techniques is not switched stepless transmission which provides the maximum possible speed of movement at any resistance to movement. The driver is controlling only by power of the engine choosing an optimum mode of movement.</p><p>V-belt self-regulated drive is capable to provide stepless regulation of speed of movement but it is insufficiently reliable and durable.</p><p>The tooth gearing is reliable and durable but it is not stepless transfer. The automatic gear box provides only automatic switching of steps which is not optimum. Besides, the automatic gear box is heavy and bulky. Such transmission cannot be established on a motorcycle or a bicycle.</p><p>The modern science about mechanisms and machines has opened essentially new phenomenon - effect of mechanical force adaptation [1,2 and 3]. According to this discovery the gear closed differential mechanism with two degrees of freedom provides movement of a output shaft with a speed inverse to the resistance moment.</p><p>Attempts of patenting of the closed differential mechanism with two degrees of freedom as self-regulated mechanism were undertaken earlier [4,5] but they did not contain a scientific substantiation of adaptation effect. These patents could not be used for creation of concrete designs with the set parameters of movement.</p><p>The patents developed on the basis of the discovery [6,7] allow creating self-regulated gear stepless transfer with the set range of the transfer ratio. Such transfer is named by adaptive transfer.</p><p>The gear adaptive transfer developed on the basis of the discovery has the elementary design and does not require any control. This transfer independently and continuously adapts to variable loading. Absence of management excludes subjective factors and provides ideal conformity to a variable mode of movement. Simplicity of a design allows establishing transfer on any sports vehicle (car, motorcycle, bicycle etc).</p><p>The concept of a drive of sports technique","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"8 ","pages":"Pages 15-21"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.08.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83242817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Simple Geometric Model for Simulating Brain Herniation Using CT Craniometry","authors":"Ke-Chun Huang ,&nbsp;Furen Xiao ,&nbsp;I-Jen Chiang ,&nbsp;Yi-Long Chen ,&nbsp;Yi-Hsin Tsai ,&nbsp;Jau-Min Wong ,&nbsp;Chun-Chih Liao","doi":"10.1016/j.aasri.2014.05.014","DOIUrl":"10.1016/j.aasri.2014.05.014","url":null,"abstract":"<div><p>The intracranial space (ICS) is incompletely separated by the cerebral falx and the cerebellar tentorium into three compartments. To simulate brain herniation, defined as part of the brain shifting from one compartment to another, we proposed a simplified model of the supratentorial space (STS) based on computed tomographic (CT) images obtained from 50 subjects.</p><p>After identifying skull regions, we manually outlined the STS regions on CT slices. Pertinent dimensions of the STS and its openings were measured. The average volumes of the ICS and the STS were 1326 and 1154<!--> <!-->mL. The average length, width and height of the STS were 154.7, 136.1, and 90.3<!--> <!-->mm. The average length and height of the subfalcine space (SFS) were 85.8 and 52.1<!--> <!-->mm, while the average length and width of midbrain were 37.9 and 30.9<!--> <!-->mm.</p><p>Based on these data, we constructed a half sphere STS model with a diameter of 160<!--> <!-->mm and a volume of 1072<!--> <!-->mL. A 40<!--> <!-->mm circle representing the tentorial incisura is removed from the center of its equatorial plane. This model is then divided into two compartments by its intact mid-sagittal plane, which had another 80<!--> <!-->mm semicircle removed to simulate the SFS.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"6 ","pages":"Pages 95-102"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.05.014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84716578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and Development of a Mini Custom Power Park","authors":"P.V. Manitha ,&nbsp;V.C. Jishnu Sankar ,&nbsp;P. Anjana ,&nbsp;Visal Raveendran ,&nbsp;Manjula G. Nair","doi":"10.1016/j.aasri.2014.05.037","DOIUrl":"10.1016/j.aasri.2014.05.037","url":null,"abstract":"<div><p>This paper presents an improved operation of the Custom power park with a newly proposed control algorithm for series active filter. Custom power devices operated for multiple customers in an industrial area form a common platform called custom power park (CPP). CPP delivers high quality high reliable supply than from the utility at different grades. The enhanced operation of CPP is proposed with GTO based static transfer switch, shunt and series active filters.The shunt active filter provides the harmonic and reactive power support for the park while voltage sag/swell and voltage harmonic mitigation is done by means of series active filter with a newly proposed control algorithm. The entire model of CPP is developed and operation is verified using MATLAB/ Simulink model.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"7 ","pages":"Pages 107-113"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.05.037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79603665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retransmission and Flow Controlfor a Video Real-Time Transport Protocol","authors":"Tzu-Hung Lin ,&nbsp;Cheng-Yu Yeh ,&nbsp;Shaw-Hwa Hwang","doi":"10.1016/j.aasri.2014.08.017","DOIUrl":"10.1016/j.aasri.2014.08.017","url":null,"abstract":"<div><p>This study provides a method to mitigate the effect of packet loss and congestion for a real-time transport protocol (RTP) [1] for video streaming. The sequence number of the RTP [2] was used to detect packet loss such that retransmission [3] and flow control [4] [5] could be addressed. Retransmission ensures that an entire frame can be appropriately decoded. Users do not see the broken image, and do not waste bandwidth. Flow control addresses the rate of data transmission that is adjusted dependent on the available network bandwidth. Frames per second are reduced by low bandwidth, but an image can still be viewed appropriately, without a black screen or freeze-frame occurring.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"8 ","pages":"Pages 100-104"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.08.017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82933850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interval based Weight Initialization Method for Sigmoidal Feedforward Artificial Neural Networks","authors":"Sartaj Singh Sodhi,&nbsp;Pravin Chandra","doi":"10.1016/j.aasri.2014.05.004","DOIUrl":"10.1016/j.aasri.2014.05.004","url":null,"abstract":"<div><p>Initial weight choice is an important aspect of the training mechanism for sigmoidal feedforward artificial neural networks. Usually weights are initialized to small random values in the same interval. A proposal is made in the paper to initialize weights such that the input layer to the hidden layer weights are initialized to random values in a manner that weights for distinct hidden nodes belong to distinct intervals. The training algorithm used in the paper is the Resilient Backpropagation algorithm. The efficiency and efficacy of the proposed weight initialization method is demonstrated on 6 function approximation tasks. The obtained results indicate that when the networks are initialized by the proposed method, the networks can reach deeper minimum of the error functional during training, generalize better (have lesser error on data that is not used for training) and are faster in convergence as compared to the usual random weight initialization method.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"6 ","pages":"Pages 19-25"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.05.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76781113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Validity Analysis of Wii Balance Board Versus Baropodometer Platform Using an Open Custom Integrated Application","authors":"Francesco Sgrò ,&nbsp;Giuseppe Monteleone ,&nbsp;Marica Pavone ,&nbsp;Mario Lipoma","doi":"10.1016/j.aasri.2014.08.005","DOIUrl":"10.1016/j.aasri.2014.08.005","url":null,"abstract":"<div><p>Standing balance tests represent the most common way to assess person's functional ability and they were realized by means of specialized and expensive platforms, especially in clinicians’ environments. Wii Balance Board (WBB) is video-game based device that measures center of pressure (CoP) oscillations and it showed promising performance compared with ‘gold standard’ force platforms. In this paper we propose an open integrated custom application to define balance outcomes using WBB. These outcomes were used to execute a validity analysis of WBB performance compared with baropodometer platform (BP). Ten subjects performed two standing balance tests with open and closed eyes respectively on WBB and BP in separate occasion. Validity analysis was carried out using r-Pearson correlation coefficient, ICC analysis, paired-sample t-Test and Bland-Altman plots. Results confirmed that the WBB, although has a fraction of cost of other platforms, represents a tool suitable for some clinician analysis</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"8 ","pages":"Pages 22-29"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.08.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84319865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of Signal Distortion Measurement System based on TMS320F2808","authors":"Xuehui Wang,&nbsp;Minggang Hao,&nbsp;Liang Liu,&nbsp;Gui Liu,&nbsp;Yi Wang","doi":"10.1016/j.aasri.2014.05.002","DOIUrl":"10.1016/j.aasri.2014.05.002","url":null,"abstract":"<div><p>TMS320F2808 DSP chip as the core, combined with signal conditioning and keyboard scan peripheral circuits, made up the hardware circuit of the measuring system. As for software,DSP as the main controller, realized the data display,controlment and management about the whole system, Using the DSP internal integrated ADC module to achieve the data collection, while using its internal resources to complete the FFT algorithm and optimization. The field test results show that this measuring system of digital signal distortion realizes the amplitude and frequency display in time domain and frequency domain when the setting signal passed the test system, and the measuring error is less than 0.8<!--> <!-->dB.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"6 ","pages":"Pages 2-11"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.05.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83300892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Android Handset VoIP Echo Cancellation","authors":"Ming-Che Yeh,&nbsp;Cheng-Yu Yeh,&nbsp;Shaw-Hwa Hwang","doi":"10.1016/j.aasri.2014.08.015","DOIUrl":"10.1016/j.aasri.2014.08.015","url":null,"abstract":"<div><p>In this study, the acoustic echo problem and cancellation method of Android-platform-based VoIP was analyzed and researched. The echo problem is consequential for Android phone-based VoIP applications. However, in the traditional 2G/3G circuit-switch (CS) mode, the acoustic echo is cancelled by the hardware chip, and the quality of communication is adequate. In the future 4G/LTE environment, all-IP packet communication will be achieved. The IMS/VoIP will become the main application for personal speech communication systems. Before the introduction of 4G with echo cancellation built into its chip, the Android-based VoIP on 3.5G/WiFi will continue to undergo the aforementioned acoustic echo problem. This paper presents an analysis of the acoustic echo on Android-based VoIP and proposes a simple echo cancellation method.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"8 ","pages":"Pages 88-92"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.08.015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80588440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization Study to the Ratio of Primeval Ball Loading in φ4.0 × 6.0 m Overflow Ball Mill of Yingezhuang Gold Mine","authors":"Qingfei Xiao ,&nbsp;Huaibin Kang ,&nbsp;Bo Li ,&nbsp;Chunmei Luo","doi":"10.1016/j.aasri.2014.05.022","DOIUrl":"10.1016/j.aasri.2014.05.022","url":null,"abstract":"<div><p>Optimized study to the ratio of primeval ball loading in 4.0 × 6.0m overflow ball Mill of Yingezhuang gold mine, the research results showed that it pertains to low hard and brittle ores, the accurate size ball should be used rather than big size ball due to mainly fines mineral are produced in the process of comminution. As the yield of intermediate granularity between 8 to 0.45<!--> <!-->mm reach up to 50.34%,the intermediate particles should be strengthened in grinding, -400 mesh content is about 40% and -10um content accounts for a quarter of the grind products what showed that particles size are not satisfied and unfavorable to subsequent separation. The optimum scheme of primeval ball loading is that: φ70: φ60: φ50: φ40= 15: 15: 30: 40 for φ4.0 × 6.0m overflow ball mill, the separate sizes contents is 64.19% between 0.15∼0.019<!--> <!-->mm which increasing by 19.14% compare with 44.78% and the mill -200mesh utilization coefficient increasing 12.6 percents compare with 0.14 about original program when φ4.0 × 6.0m overflow ball mill work itself alone, in addition, the mill -200mesh utilization coefficient increasing 11.71 percents compare with 0.1503 about original program when φ4.0 × 6.0m overflow ball mill and φ3.6 × 6.0m grate ball mill are working together.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"7 ","pages":"Pages 14-19"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.05.022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90314351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Noise Variance Estimation for Spectrum Sensing in Cognitive Radio Networks","authors":"Adeel Ahmed,&nbsp;Yim Fun Hu,&nbsp;James M. Noras","doi":"10.1016/j.aasri.2014.09.008","DOIUrl":"10.1016/j.aasri.2014.09.008","url":null,"abstract":"<div><p>Spectrum sensing is used in cognitive radio systems to detect the availability of spectrum holes for secondary usage. The simplest and most famous spectrum sensing techniques are based either on energy detection or eigenspace analysis from Random Matrix Theory (RMT) such as using the Marchenko-Pastur law. These schemes suffer from uncertainty in estimating the noise variance which reduces their performance. In this paper we propose a new method to evaluate the noise variance that can eliminate the limitations of the aforementioned schemes. This method estimates the noise variance from a measurement set of noisy signals or noise-only signals. Extensive simulations show that the proposed method performs well in estimating the noise variance. Its performance greatly improves with increasing numbers of measurements and also with increasing numbers of samples taken per measurement.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"9 ","pages":"Pages 37-43"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.09.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79641325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}