Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810207
S. Kamel, A. Rahbar
A surveillance system is a sort of wireless sensor network to monitor targets, where a scheduling is required for monitoring period of each sensor in order to control the power consumption of sensors. In this network, a base station makes scheduling matrices regarding to network specifications, then sends these matrices to sensors in the network. Then, the sensors act based on these scheduling matrices. Since making the scheduling matrices needs a higher complexity, a heuristic method is presented in this paper in order to reduce the complexity and to provide the scheduling matrices without affecting the network performance remarkably. By this heuristic method, scheduling matrices that have little effect on coverage of time in system are eliminated.
{"title":"Heuristic Surveillance of Targets in Sensor Networks","authors":"S. Kamel, A. Rahbar","doi":"10.1109/HONET.2008.4810207","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810207","url":null,"abstract":"A surveillance system is a sort of wireless sensor network to monitor targets, where a scheduling is required for monitoring period of each sensor in order to control the power consumption of sensors. In this network, a base station makes scheduling matrices regarding to network specifications, then sends these matrices to sensors in the network. Then, the sensors act based on these scheduling matrices. Since making the scheduling matrices needs a higher complexity, a heuristic method is presented in this paper in order to reduce the complexity and to provide the scheduling matrices without affecting the network performance remarkably. By this heuristic method, scheduling matrices that have little effect on coverage of time in system are eliminated.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126335291","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810223
S. Sarwar, Y. Mahmood, H. F. Ahmed, Raihan-Ur-Rasool, H. Takahashi
Cache being the fastest medium in memory hierarchy has a vital role to play in concealing delays and access latencies during 10 operations and hence in improving system response time. One of the most substantial approaches to fully exploit the significance of cache memory is data prefetching, where we envisage future requests of users and take data to memory in advance. Current prefetching techniques, performing limited prefetching, are based upon locality of reference principle (situation specific); Markov series (slow for practical implementation) or dual data caching (quite burdensome for programmer) with biased cache replacement policies. So we present a novel 'usage pattern based' approach for predictive prefetching; employing proven neural networks to broaden the scope of prefetching at user level. The efficacy of approach is revealed by its accuracy and minimal resource usage as affirmed by preliminary results.
{"title":"Usage Pattern Based Prefetching For Mechanical Mass Storage","authors":"S. Sarwar, Y. Mahmood, H. F. Ahmed, Raihan-Ur-Rasool, H. Takahashi","doi":"10.1109/HONET.2008.4810223","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810223","url":null,"abstract":"Cache being the fastest medium in memory hierarchy has a vital role to play in concealing delays and access latencies during 10 operations and hence in improving system response time. One of the most substantial approaches to fully exploit the significance of cache memory is data prefetching, where we envisage future requests of users and take data to memory in advance. Current prefetching techniques, performing limited prefetching, are based upon locality of reference principle (situation specific); Markov series (slow for practical implementation) or dual data caching (quite burdensome for programmer) with biased cache replacement policies. So we present a novel 'usage pattern based' approach for predictive prefetching; employing proven neural networks to broaden the scope of prefetching at user level. The efficacy of approach is revealed by its accuracy and minimal resource usage as affirmed by preliminary results.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132532874","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810247
M. Pourmahayabadi, S. Nejad, Emails Pmahyabadi, Sahrammnajuslacli, Vi Xs, Vi Xhj, Vi
In this paper, a modified designing method about PCFs with large modal area, low confinement loss and flattened dispersion in a wide wavelength range is proposed. All air holes are arranged in the section according to triangular regulation and with identical spacing. The thirteen air holes which arranged in the snowflake shape in the middle of the section are replaced with high index inclusions that are smaller than the other air holes of the outer cladding which form the core region. So, a hybrid photonic crystal fiber in which a guided mode is confined simultaneously by modified total internal reflection from an array of air holes and anti-resonant reflection from the high-index inclusions is presented. We consider simulating PCF using the FDTD technique by imposing PML for boundary condition treatment in the longitudinal dimension, thereby reducing the problem to two dimensions. Desired dispersion character and low confinement loss can be realized in our designed PCFs with special section structure by optimizing the match of the spacing and air hole size in core and cladding regions and controlling the core-cladding refractive index difference.
{"title":"Optimal Confinement Loss Reduction in Photonic Crystal Fiber with Flattened Dispersion","authors":"M. Pourmahayabadi, S. Nejad, Emails Pmahyabadi, Sahrammnajuslacli, Vi Xs, Vi Xhj, Vi","doi":"10.1109/HONET.2008.4810247","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810247","url":null,"abstract":"In this paper, a modified designing method about PCFs with large modal area, low confinement loss and flattened dispersion in a wide wavelength range is proposed. All air holes are arranged in the section according to triangular regulation and with identical spacing. The thirteen air holes which arranged in the snowflake shape in the middle of the section are replaced with high index inclusions that are smaller than the other air holes of the outer cladding which form the core region. So, a hybrid photonic crystal fiber in which a guided mode is confined simultaneously by modified total internal reflection from an array of air holes and anti-resonant reflection from the high-index inclusions is presented. We consider simulating PCF using the FDTD technique by imposing PML for boundary condition treatment in the longitudinal dimension, thereby reducing the problem to two dimensions. Desired dispersion character and low confinement loss can be realized in our designed PCFs with special section structure by optimizing the match of the spacing and air hole size in core and cladding regions and controlling the core-cladding refractive index difference.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133623159","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810248
A. Hayat, S. Khan, M. Alam
Provisioning of sophisticated electronic government (e-Government) applications pose several challenges to public authorities; identification and authentication of citizens is one of them. To address this challenge, governments around the world are developing their identity management systems (IDMS) keeping in view their existing ICT infrastructure, social sensitivities, and political and legal dimensions. In this paper we have reviewed existing identity management systems and discussed what all is required for developing an identity management system for Pakistan. Different possible solutions from country's perspective have been considered and their merits and demerits have been discussed.
{"title":"Identity Management System for Electronic Government Processes in Pakistan","authors":"A. Hayat, S. Khan, M. Alam","doi":"10.1109/HONET.2008.4810248","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810248","url":null,"abstract":"Provisioning of sophisticated electronic government (e-Government) applications pose several challenges to public authorities; identification and authentication of citizens is one of them. To address this challenge, governments around the world are developing their identity management systems (IDMS) keeping in view their existing ICT infrastructure, social sensitivities, and political and legal dimensions. In this paper we have reviewed existing identity management systems and discussed what all is required for developing an identity management system for Pakistan. Different possible solutions from country's perspective have been considered and their merits and demerits have been discussed.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121803673","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810218
H. Harun, S. M. Idrus, A. .. Mohammad, N. Mohamed
Radio over fiber (RoF) system is the solution for the providing highly reliable communication service. This system is characterized by having both a fiber optic link and free-space radio path to exploit the synergy of two complementary technologies; the broadband mobile wireless access and fixed optical access. Optoelectronic mixing is required in RoF systems to detect the RF modulated optical signal and perform frequency up-conversion. In this work, three-terminal InP/InGaAs HBT with optical access has been used as the optoelectronic mixer (OEM) for front-end RoF optical receiver configuration. Thus in this configuration, the photodetection and frequency conversion can be achieved in p-i-n photodiode and HBT device, which considerably simplify the conventional method. The RoF OEM was successfully simulated using a nonlinear microwave simulator to perform harmonics balance analysis, which represented actual photodetection model and nonlinear dynamic optoelectronic mixing behavior. In this paper we reported the - 5.2 dB maximum internal mixing efficiency for 400 MHz IF modulated signal to 3.4 GHz upconverted RF signal with LO power is -2dBm, and that agreed with conventional theoretical analysis. In this article, the theory of operation, the device structure of the RoF OEM and its characteristic will be presented.
{"title":"HBT Optoelectronic Mixer Design for Radio over Fiber System","authors":"H. Harun, S. M. Idrus, A. .. Mohammad, N. Mohamed","doi":"10.1109/HONET.2008.4810218","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810218","url":null,"abstract":"Radio over fiber (RoF) system is the solution for the providing highly reliable communication service. This system is characterized by having both a fiber optic link and free-space radio path to exploit the synergy of two complementary technologies; the broadband mobile wireless access and fixed optical access. Optoelectronic mixing is required in RoF systems to detect the RF modulated optical signal and perform frequency up-conversion. In this work, three-terminal InP/InGaAs HBT with optical access has been used as the optoelectronic mixer (OEM) for front-end RoF optical receiver configuration. Thus in this configuration, the photodetection and frequency conversion can be achieved in p-i-n photodiode and HBT device, which considerably simplify the conventional method. The RoF OEM was successfully simulated using a nonlinear microwave simulator to perform harmonics balance analysis, which represented actual photodetection model and nonlinear dynamic optoelectronic mixing behavior. In this paper we reported the - 5.2 dB maximum internal mixing efficiency for 400 MHz IF modulated signal to 3.4 GHz upconverted RF signal with LO power is -2dBm, and that agreed with conventional theoretical analysis. In this article, the theory of operation, the device structure of the RoF OEM and its characteristic will be presented.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114657064","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810229
A. Ahmed, A. Abdullah, P. Dominic
An important challenge to database researchers in mobile computing environment is to provide a data replication solution that maintains the consistency and improves the availability of replicated data. This paper addresses this problem for large scale mobile traffic control environments. Our solution represents a new binary replication strategy, in terms of its components and approach. The new strategy encompasses two components: replication architecture to provide a solid infrastructure for improving data availability and a multi-agent based replication method to transfer data updates in a manner that achieves the consistency of data. The new strategy is a hybrid of both pessimistic and optimistic replication approaches, in order to exploit the features of each to support higher data availability and lower rate of inconsistencies as well as supports the mobility of users.
{"title":"A multi-Agent Based Replication Strategy for Improving Availability and Maintaining Consistency of Data in Large Scale Mobile Traffic Control Environments","authors":"A. Ahmed, A. Abdullah, P. Dominic","doi":"10.1109/HONET.2008.4810229","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810229","url":null,"abstract":"An important challenge to database researchers in mobile computing environment is to provide a data replication solution that maintains the consistency and improves the availability of replicated data. This paper addresses this problem for large scale mobile traffic control environments. Our solution represents a new binary replication strategy, in terms of its components and approach. The new strategy encompasses two components: replication architecture to provide a solid infrastructure for improving data availability and a multi-agent based replication method to transfer data updates in a manner that achieves the consistency of data. The new strategy is a hybrid of both pessimistic and optimistic replication approaches, in order to exploit the features of each to support higher data availability and lower rate of inconsistencies as well as supports the mobility of users.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114977602","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810227
M. I. Anis, N. Ahmed
Digital video broadcasting-handheld (DVB-H) is based on the earlier standard DVB-T, which is used for terrestrial TV broadcasting. This new standard brings features that make it possible to receive digital video broadcast of DVD quality video and sound in handheld devices, it also offers reliable high data rate reception for mobile & battery powered devices, The paper discusses and compares the key technology elements 4 K and 2 K modes, in-depth interleavers, time slicing and multi protocol encapsulation-forward error correction (MPE-FEC). In addition, extensive range of SER performance results on software based simulations is provided. The result suggest that by using an erasure decoding method with the Ree -Solomon code & cyclic redundancy check error detection as the link layer forward error correction, the strength of the signal is much higher while error detection & correction becomes doubles.
{"title":"Performance Analysis of SER in DVB-H by using Reed-Solomon Code with Erasure and Non Erasure Technique","authors":"M. I. Anis, N. Ahmed","doi":"10.1109/HONET.2008.4810227","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810227","url":null,"abstract":"Digital video broadcasting-handheld (DVB-H) is based on the earlier standard DVB-T, which is used for terrestrial TV broadcasting. This new standard brings features that make it possible to receive digital video broadcast of DVD quality video and sound in handheld devices, it also offers reliable high data rate reception for mobile & battery powered devices, The paper discusses and compares the key technology elements 4 K and 2 K modes, in-depth interleavers, time slicing and multi protocol encapsulation-forward error correction (MPE-FEC). In addition, extensive range of SER performance results on software based simulations is provided. The result suggest that by using an erasure decoding method with the Ree -Solomon code & cyclic redundancy check error detection as the link layer forward error correction, the strength of the signal is much higher while error detection & correction becomes doubles.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130279751","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810245
K. Fasihi, S. Nejad
We present design and modeling of photonic crystal (PC) hybrid waveguides with quasi-flat transmission band. The finite-difference time-domain (FDTD) and coupled-mode theory (CMT) methods are used to simulate the PC hybrid waveguide of square lattice. The bandwidth of the hybrid waveguide is investigated for different radius of the coupled cavities. The transmission of a 200-fs pulse at 1550 nm is simulated by using the FDTD method, and the transmitted pulse shows very little distortion.
{"title":"Design and Modeling of Hybrid Waveguides with Quasi-Flat Transmission Band","authors":"K. Fasihi, S. Nejad","doi":"10.1109/HONET.2008.4810245","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810245","url":null,"abstract":"We present design and modeling of photonic crystal (PC) hybrid waveguides with quasi-flat transmission band. The finite-difference time-domain (FDTD) and coupled-mode theory (CMT) methods are used to simulate the PC hybrid waveguide of square lattice. The bandwidth of the hybrid waveguide is investigated for different radius of the coupled cavities. The transmission of a 200-fs pulse at 1550 nm is simulated by using the FDTD method, and the transmitted pulse shows very little distortion.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134628055","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810246
S. Mohammadnejad, S. E. Maklavani, E. Rahimi
In this paper the current transport mechanism of ZnO-based metal-semiconductor-metal ultraviolet photodetectors with various contact electrodes is discussed and simulated. The simulation is based on the thermionic emission theory and tunneling effects. It was found that the lowest dark current attributes to the Ru contact electrode. Moreover, it is shown that in order to achieve a large Schottky barrier height on ZnO and more reduction of dark current, one can insert a thin oxide layer between contacts and ZnO layer. The influence of the thickness of the insulator layer on the dark current of the MIS photodetector has also analyzed.
{"title":"Dark Current Reduction in ZnO-Based MSM Photodetectors with Interfacial Thin Oxide Layer","authors":"S. Mohammadnejad, S. E. Maklavani, E. Rahimi","doi":"10.1109/HONET.2008.4810246","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810246","url":null,"abstract":"In this paper the current transport mechanism of ZnO-based metal-semiconductor-metal ultraviolet photodetectors with various contact electrodes is discussed and simulated. The simulation is based on the thermionic emission theory and tunneling effects. It was found that the lowest dark current attributes to the Ru contact electrode. Moreover, it is shown that in order to achieve a large Schottky barrier height on ZnO and more reduction of dark current, one can insert a thin oxide layer between contacts and ZnO layer. The influence of the thickness of the insulator layer on the dark current of the MIS photodetector has also analyzed.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124314720","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}
Pub Date : 2008-11-01DOI: 10.1109/HONET.2008.4810241
Huan Luo, K. Harfoush
In this paper, we propose a new multicast scheme, PAM, which as opposed to native IP multicast, does not require all routers to be IP multicast-enabled, and as opposed to existing application-level multicast, does not exclude network support. Instead, PAM relies on partial network support, selects a small subset of routers as PAM-enabled multicast routers that are strategically located to serve group communication, and adapts its selection based on group dynamics. As a result, PAM (1) is suitable for both sparse and dense communication groups, (2) can reduce the network overhead inherent in native IP multicast, and (3) does not suffer the delay stretch and the high stress inherent in application-level multicast. Experimental results on both synthetic and realistic Internet topologies, for both sparse and dense groups, reveal that PAM can achieve efficient group communication with no delay stretch, an average stress of merely 1.25, while using less than 15% of the multicast routers that are needed in native IP multicast.
{"title":"Adaptive Hybrid Multicast with Partial Network Support","authors":"Huan Luo, K. Harfoush","doi":"10.1109/HONET.2008.4810241","DOIUrl":"https://doi.org/10.1109/HONET.2008.4810241","url":null,"abstract":"In this paper, we propose a new multicast scheme, PAM, which as opposed to native IP multicast, does not require all routers to be IP multicast-enabled, and as opposed to existing application-level multicast, does not exclude network support. Instead, PAM relies on partial network support, selects a small subset of routers as PAM-enabled multicast routers that are strategically located to serve group communication, and adapts its selection based on group dynamics. As a result, PAM (1) is suitable for both sparse and dense communication groups, (2) can reduce the network overhead inherent in native IP multicast, and (3) does not suffer the delay stretch and the high stress inherent in application-level multicast. Experimental results on both synthetic and realistic Internet topologies, for both sparse and dense groups, reveal that PAM can achieve efficient group communication with no delay stretch, an average stress of merely 1.25, while using less than 15% of the multicast routers that are needed in native IP multicast.","PeriodicalId":433243,"journal":{"name":"2008 International Symposium on High Capacity Optical Networks and Enabling Technologies","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116732315","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：