A novel hybrid NAND Flash management strategy optimization algorithm is proposed in this paper, which can greatly improve the write performance and the efficiency of garbage collection. We improve the write speed of the system by a self-adaptively dynamic address mapping mechanism and considering the spatial locality and temporal locality of the sector address mapping table. So we call our algorithm as FRW. Each data block in FRW can has multiple log blocks. Then we designed an ingenious dynamic block address mapping table by increasing the storage of the log block list information and the number of free sectors remaining in the current block, which greatly improves the write performance of our algorithm. At last we compared our optimization algorithm FRW with the classical hybrid FAST algorithm on the Flash Sim simulator.
{"title":"A Novel Hybrid Address Mapping Strategy of NAND Flash","authors":"Yuan Gao, Libao Deng, Youhua Gong, Liyan Qiao","doi":"10.1109/IMCCC.2014.89","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.89","url":null,"abstract":"A novel hybrid NAND Flash management strategy optimization algorithm is proposed in this paper, which can greatly improve the write performance and the efficiency of garbage collection. We improve the write speed of the system by a self-adaptively dynamic address mapping mechanism and considering the spatial locality and temporal locality of the sector address mapping table. So we call our algorithm as FRW. Each data block in FRW can has multiple log blocks. Then we designed an ingenious dynamic block address mapping table by increasing the storage of the log block list information and the number of free sectors remaining in the current block, which greatly improves the write performance of our algorithm. At last we compared our optimization algorithm FRW with the classical hybrid FAST algorithm on the Flash Sim simulator.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124443288","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}
N. Zhang, Jun Jiang, Jingsheng Tang, Zongtan Zhou, D. Hu
In this paper, a brain-computer interface (BCI) system based on steady-state visually evoked EEG potentials (SSVEP) has been presented to steer a NAO humanoid robot, in which a novel robot control paradigm with two-layer-interface was designed and implemented. The scene captured from robot camera was divided into different target regions and displayed to the human subjects with extra visual stimulus superposed on it to reduce the influence of dynamic background scene and the side-effect of gaze shift. The visually evoked potentials was captured from the subjects' EEG signals to accomplish the directions selection mission and to control the NAO robot's movements towards the target region. All the subjects could complete the mission using our BCI paradigm in the real-world environment. The results showed the feasibility of our BCI paradigm in brain-actuated robot control.
{"title":"A Novel Steady-State Visually Evoked Potential-Based Brain-Computer-Interface Paradigm to Steer a Humanoid Robot","authors":"N. Zhang, Jun Jiang, Jingsheng Tang, Zongtan Zhou, D. Hu","doi":"10.1109/IMCCC.2014.164","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.164","url":null,"abstract":"In this paper, a brain-computer interface (BCI) system based on steady-state visually evoked EEG potentials (SSVEP) has been presented to steer a NAO humanoid robot, in which a novel robot control paradigm with two-layer-interface was designed and implemented. The scene captured from robot camera was divided into different target regions and displayed to the human subjects with extra visual stimulus superposed on it to reduce the influence of dynamic background scene and the side-effect of gaze shift. The visually evoked potentials was captured from the subjects' EEG signals to accomplish the directions selection mission and to control the NAO robot's movements towards the target region. All the subjects could complete the mission using our BCI paradigm in the real-world environment. The results showed the feasibility of our BCI paradigm in brain-actuated robot control.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114653721","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}
Tong Wu, Yi Yan, Yongcheng Li, Chunmei Wang, Xiujuan Yao, Xue Li
Electromagnetic waves used for deep space communications are mainly affected by the charged particles ejected by the sun. These effects may result in degradation of communication quality or communication interruption. This paper discusses the effects of solar scintillation on electro-magnetic waves, including the scintillation index which is a measure of the intensity scintillation, the coherence bandwidth and the coherence time of deep space communication channel. The deep space communication channel under solar scintillation is modeled by using Rician fading channel according to the scintillation index. The coherence bandwidth will determine whether the channel is flat fading or frequency selective fading and the coherence time will determine whether the channel is slow fading or fast fading. The approach of choosing signal band width is determined by the coherence bandwidth and the coherence time with the change of the solar elongation angle. The simulation results show the bit error rate of the signal bandwidth chosen by the proposed approach is lower than a random choice.
{"title":"Deep Space Communication Channel Characteristics under Solar Scintillation","authors":"Tong Wu, Yi Yan, Yongcheng Li, Chunmei Wang, Xiujuan Yao, Xue Li","doi":"10.1109/IMCCC.2014.111","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.111","url":null,"abstract":"Electromagnetic waves used for deep space communications are mainly affected by the charged particles ejected by the sun. These effects may result in degradation of communication quality or communication interruption. This paper discusses the effects of solar scintillation on electro-magnetic waves, including the scintillation index which is a measure of the intensity scintillation, the coherence bandwidth and the coherence time of deep space communication channel. The deep space communication channel under solar scintillation is modeled by using Rician fading channel according to the scintillation index. The coherence bandwidth will determine whether the channel is flat fading or frequency selective fading and the coherence time will determine whether the channel is slow fading or fast fading. The approach of choosing signal band width is determined by the coherence bandwidth and the coherence time with the change of the solar elongation angle. The simulation results show the bit error rate of the signal bandwidth chosen by the proposed approach is lower than a random choice.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128718266","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}
Jinying Yin, Hongyan Yang, Siqi Zhang, Y. Qin, Zhen Zhou
Solar radiation is strongly absorbed by soot aggregate. And the atmospheric radiative properties will be affected by the change of aggregate morphology. Based on fractal theory, the morphological properties of soot aggregates are studied using the cluster-cluster aggregation (CCA) model. The superposition T matrix method is employed to perform extensive computations of extinction, absorption and scattering properties of soot aggregates with varying state of compactness and size. The relationship between the morphology and radiative properties of aggregates is discussed. Firstly, the radiative properties of different size and different morphology of aggregates are analyzed with the change of the volume fraction. Then, the absorption, scattering and extinction cross-sections of a fixed morphology aggregate are analyzed with changing particle size. Finally, an essential data for detecting soot aerosol concentration can be provided by the value of absorption cross-section of our results.
{"title":"Influence of Soot Agglomerate Morphology on Radiative Properties in Concentration Detection","authors":"Jinying Yin, Hongyan Yang, Siqi Zhang, Y. Qin, Zhen Zhou","doi":"10.1109/IMCCC.2014.158","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.158","url":null,"abstract":"Solar radiation is strongly absorbed by soot aggregate. And the atmospheric radiative properties will be affected by the change of aggregate morphology. Based on fractal theory, the morphological properties of soot aggregates are studied using the cluster-cluster aggregation (CCA) model. The superposition T matrix method is employed to perform extensive computations of extinction, absorption and scattering properties of soot aggregates with varying state of compactness and size. The relationship between the morphology and radiative properties of aggregates is discussed. Firstly, the radiative properties of different size and different morphology of aggregates are analyzed with the change of the volume fraction. Then, the absorption, scattering and extinction cross-sections of a fixed morphology aggregate are analyzed with changing particle size. Finally, an essential data for detecting soot aerosol concentration can be provided by the value of absorption cross-section of our results.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128159560","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}
Binbin Wan, Taozheng Zhang, Jianping Chai, Min Zhao, Zhenlong Zhang
In this paper, we take the guide data and the program data from the users of digital cable television programs as the experimental data to carry on our experiment. And we use the SAS software platform which is very efficient in data analyzing to realize the classification of our user to different parts. So we can achieve our destination of personal recommendation and precision advertizing.
{"title":"Joint Optimization of Coverage and Capacity Based on Power Density Distribution in Heterogeneous Cellular Networks","authors":"Binbin Wan, Taozheng Zhang, Jianping Chai, Min Zhao, Zhenlong Zhang","doi":"10.1109/IMCCC.2014.209","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.209","url":null,"abstract":"In this paper, we take the guide data and the program data from the users of digital cable television programs as the experimental data to carry on our experiment. And we use the SAS software platform which is very efficient in data analyzing to realize the classification of our user to different parts. So we can achieve our destination of personal recommendation and precision advertizing.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129346185","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}
According to the demand of monitoring hierarchical execution process of complex product, this paper puts forward a technology about coordination of the production process associated with complex product based on Task-Kitting Process. From supervisory of complex associated production, This paper takes process-oriented multi-parametric monitored modeling and processed dynamic assembly monitoring packet as the key, combining instruction node driven data acquisition technology and establish visual monitoring of the implementation process of assembly. Finally, combined with practical running analysis of engineering examples, this paper verifies the reasonableness and effectiveness of this technology.
{"title":"The Technology about Coordination of the Production Process Associated with Complex Product Based on Task-Kitting-Crafts","authors":"Xue Zhen, Aimin Wang","doi":"10.1109/IMCCC.2014.22","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.22","url":null,"abstract":"According to the demand of monitoring hierarchical execution process of complex product, this paper puts forward a technology about coordination of the production process associated with complex product based on Task-Kitting Process. From supervisory of complex associated production, This paper takes process-oriented multi-parametric monitored modeling and processed dynamic assembly monitoring packet as the key, combining instruction node driven data acquisition technology and establish visual monitoring of the implementation process of assembly. Finally, combined with practical running analysis of engineering examples, this paper verifies the reasonableness and effectiveness of this technology.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126968941","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}
Storage tanks of chemical industry often reserve many hazardous substances, the fire, explosion and leakage accident of them often leads to great damage to property and casualty. Fault tree analysis is an important method for safety analysis, it has many advantages on the chemical industry storage tank analysis. This paper studies the features of chemical tanks and the fault tree method, analysis the harmful factors of the tanks systematically. Then take an fire and explosion accident of tank for example to analysis, including: draws fault tree, sets quantitative analysis, calculate the probability and critical importance degree, propose appropriate measures for accident prevention. Finally summarized the advantages of the fault tree analysis in safety analysis of the chemical industry tanks, and the need for improvement.
{"title":"Fault Tree Analysis of the Storage Tanks in the Chemical Industry","authors":"Ao Hongguang","doi":"10.1109/IMCCC.2014.195","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.195","url":null,"abstract":"Storage tanks of chemical industry often reserve many hazardous substances, the fire, explosion and leakage accident of them often leads to great damage to property and casualty. Fault tree analysis is an important method for safety analysis, it has many advantages on the chemical industry storage tank analysis. This paper studies the features of chemical tanks and the fault tree method, analysis the harmful factors of the tanks systematically. Then take an fire and explosion accident of tank for example to analysis, including: draws fault tree, sets quantitative analysis, calculate the probability and critical importance degree, propose appropriate measures for accident prevention. Finally summarized the advantages of the fault tree analysis in safety analysis of the chemical industry tanks, and the need for improvement.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130671416","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}
In recent years, extensive research found that although a series of relationships between vertices in large-scale biological networks seemingly erratic, there are many frequently occurring sub-structures, and the number of these sub-structures is significantly more than that appears in randomly generated network. Experiments show that these sub-structures often have very important biological significance, such structure is defined as a motif. Traditional motifs discovery methods are used to identify exact motifs and biological networks often have inherent uncertainty and dynamic properties. Therefore, discovering the consensus motifs which have stochastic properties will become an important research direction of biological networks research. In this paper, we present a new method named CBOS (Clustering Base On the Score) which clustering sub graphs base on the score defined by combine the cluster's weight with the mismatch value between clusters to discovery consensus motifs in biological networks, because the cluster with high weight is considered to have more possibility to be defined as a motif. We apply this approach to the transcriptional regulatory networks of Escherichia coli and Saccharomyces cerevisiae, the results show that the method of CBOS can mining the consensus motifs efficiently, and compared with the existing algorithms, CBOS algorithm has a better performance.
近年来，广泛的研究发现，虽然大规模生物网络中一系列顶点之间的关系看似不稳定，但却存在许多频繁发生的子结构，而且这些子结构的数量明显多于随机生成的网络。实验表明，这些子结构往往具有非常重要的生物学意义，这种结构被定义为基序。传统的基序发现方法用于识别精确的基序，而生物网络往往具有固有的不确定性和动态性。因此，发现具有随机特性的一致基序将成为生物网络研究的一个重要研究方向。本文提出了一种基于分数的聚类方法CBOS (Clustering based On the Score)，该方法将聚类的权重与聚类之间的不匹配值相结合，根据分数对子图进行聚类，以发现生物网络中一致的基序，因为权重越大的聚类被定义为基序的可能性越大。将该方法应用于大肠杆菌和酿酒酵母的转录调控网络，结果表明，CBOS方法可以有效地挖掘共识基序，并且与现有算法相比，CBOS算法具有更好的性能。
{"title":"CBOS-Clustering Base on the Score for Motif Discovery in Biological Network","authors":"Dawei Chen, Jieyue He","doi":"10.1109/IMCCC.2014.178","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.178","url":null,"abstract":"In recent years, extensive research found that although a series of relationships between vertices in large-scale biological networks seemingly erratic, there are many frequently occurring sub-structures, and the number of these sub-structures is significantly more than that appears in randomly generated network. Experiments show that these sub-structures often have very important biological significance, such structure is defined as a motif. Traditional motifs discovery methods are used to identify exact motifs and biological networks often have inherent uncertainty and dynamic properties. Therefore, discovering the consensus motifs which have stochastic properties will become an important research direction of biological networks research. In this paper, we present a new method named CBOS (Clustering Base On the Score) which clustering sub graphs base on the score defined by combine the cluster's weight with the mismatch value between clusters to discovery consensus motifs in biological networks, because the cluster with high weight is considered to have more possibility to be defined as a motif. We apply this approach to the transcriptional regulatory networks of Escherichia coli and Saccharomyces cerevisiae, the results show that the method of CBOS can mining the consensus motifs efficiently, and compared with the existing algorithms, CBOS algorithm has a better performance.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125359897","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}
With external disturbances, an robust synchronization control approach is present. Then the robust synchronization control system comprises a disturbances observer and an controller. The disturbances observer is used to estimating the disturbances. And the errors of vessels are introduced to the controller. Meanwhile, the stability of the disturbances observer and the controller are proved by the Lyapunov theory. Finally, simulations are carried out to show effectiveness of the proposed control strategy.
{"title":"Robust Synchronization Control of Multiple Vessels with Disturbances","authors":"Fuguang Ding, Yanqin Ma, Yuanwei Zhou","doi":"10.1109/IMCCC.2014.21","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.21","url":null,"abstract":"With external disturbances, an robust synchronization control approach is present. Then the robust synchronization control system comprises a disturbances observer and an controller. The disturbances observer is used to estimating the disturbances. And the errors of vessels are introduced to the controller. Meanwhile, the stability of the disturbances observer and the controller are proved by the Lyapunov theory. Finally, simulations are carried out to show effectiveness of the proposed control strategy.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123296603","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}
Side-window detection technology is adopted by the kinetic kill vehicle (KKV) to solve the problem of aerodynamic heat induced by the high speed. A new side-window orientation algorithm is proposed to adjust the KKV attitude angles according to the line-of-sight (LOS) angles to achieve stable and accurate tracking of the target. The time-scale separation methodology is adopted to implement the side window algorithm. The attitude thrusters are activated in pulse mode, and the pulse-width pulse-frequency (PWPF) modulation is adopted to control the thrusters firing. PWPF modulation is a control method that provides pseudo-linear operation for an on-off thruster. PWPF modulator holds several advantages over classical bang-bang controllers such as close to linear operation, high accuracy, and reduced propellant consumption. A modified PWPF modulator with threshold limitation is adopted in this paper to reduce the number of thruster firings and fuel consumption at a possible cost of control accuracy. The control scheme is verified using computer simulation. The results have been proven the potential of this scheme.
{"title":"Side-Mounted Window Orientation Algorithm and Attitude Controller Design for Kinetic Kill Vehicle","authors":"Lu Cang-hai, Cai Yuan-li, Zhi Qiang","doi":"10.1109/IMCCC.2014.75","DOIUrl":"https://doi.org/10.1109/IMCCC.2014.75","url":null,"abstract":"Side-window detection technology is adopted by the kinetic kill vehicle (KKV) to solve the problem of aerodynamic heat induced by the high speed. A new side-window orientation algorithm is proposed to adjust the KKV attitude angles according to the line-of-sight (LOS) angles to achieve stable and accurate tracking of the target. The time-scale separation methodology is adopted to implement the side window algorithm. The attitude thrusters are activated in pulse mode, and the pulse-width pulse-frequency (PWPF) modulation is adopted to control the thrusters firing. PWPF modulation is a control method that provides pseudo-linear operation for an on-off thruster. PWPF modulator holds several advantages over classical bang-bang controllers such as close to linear operation, high accuracy, and reduced propellant consumption. A modified PWPF modulator with threshold limitation is adopted in this paper to reduce the number of thruster firings and fuel consumption at a possible cost of control accuracy. The control scheme is verified using computer simulation. The results have been proven the potential of this scheme.","PeriodicalId":152074,"journal":{"name":"2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114226778","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}
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