Knowledge of oxygen consumption rates and asphyxiation points in fish is important to determine appropriate stocking and water quality management in aquaculture. The oxygen consumption rate and asphyxiation point in C...Knowledge of oxygen consumption rates and asphyxiation points in fish is important to determine appropriate stocking and water quality management in aquaculture. The oxygen consumption rate and asphyxiation point in Chanodichthys mongolicus were detected under laboratory conditions using an improved respirometer chamber. The results revealed that more accurate estimates can be obtained by adjusting the volume of the respirometer chamber, which may avoid system errors caused by either repeatedly adjusting fish density or selecting different equipment specifications. The oxygen consumption rate and asphyxiation point of C. mongolicus increased with increasing water temperature and decreasing fish size. Changes in the C. mongolicus oxygen consumption rate were divided into three stages at water temperatures of 11-33~C： （I） a low temperature oxygen consumption rate stage when water temperature was 11-19~C, （2） the optimum temperature oxygen consumption rate stage when water temperature was 19-23~C, and （3） a high temperature oxygen consumption rate stage when water temperature was 〉27~C. The temperature quotients （Q10） obtained suggested that C. mongolicus preferred a temperature range of 19-23~C. At 19~C, C. mongolicus exhibited higher oxygen consumption rates during the day when the maximum values were observed at 10：00 and 14：00 than at night when the minimum occurred at 02：00.展开更多
在不均匀光照条件下,光伏阵列输出特性呈现多峰现象,传统的最大功率点跟踪(maximum power point tracking,MPPT)方法容易陷入局部极值。为了提高复杂阴影下的跟踪速度和跟踪精度,结合改进粒子群算法(improved particle swarm optimizati...在不均匀光照条件下,光伏阵列输出特性呈现多峰现象,传统的最大功率点跟踪(maximum power point tracking,MPPT)方法容易陷入局部极值。为了提高复杂阴影下的跟踪速度和跟踪精度,结合改进粒子群算法(improved particle swarm optimization,IPSO)和自适应步长扰动观察法(adaptive perturbation and observation,AP&O)各自的特点,提出了基于IPSO-AP&O算法的改进MPPT控制方法。其中,IPSO算法采用自适应惯性权重因子,在不同搜索阶段能够充分搜索目标函数,然后与AP&O算法结合实现最大功率的稳定输出。仿真结果表明,所提出的IPSO-AP&O算法减少了传统智能算法的迭代过程,能快速跟踪到全局最大功率点,相比其余几种算法而言,在光照强度突变时均具备快速精准的双重跟踪能力,在4种场景下跟踪效率分别为99.86%、99.91%、87.63%、99.79%,能够更好地减小光伏阵列外部条件变化导致的功率损耗,所提出的MPPT控制方法能够较好地适用于光储混合系统,具备工程实用价值。展开更多
In the science fiction novel titled The Planet of the Apes （1963）, Pierre Boulle tells a story about a completely reversed world where the apes dominate the humans. Coming from the normal world that is ours, a small...In the science fiction novel titled The Planet of the Apes （1963）, Pierre Boulle tells a story about a completely reversed world where the apes dominate the humans. Coming from the normal world that is ours, a small group of people is totally embarrassed and confused by observing this strange world. On the planet of the apes that they have discovered, it is the apes that are more intelligent than the humans. On the earth, it was the other way around. That observation results in their perplexity. The two communities, human and simian, bear with one another the relationship that corresponds to what Lotman calls ＂enantiomorphic pairings＂. In this context, a series of questions deserves to be raised： Is a ＂common language＂ possible between the two communities in the enantiomorphic pairings？ If the answer is yes, under what conditions could they succeed in opening up a space where they can have something in common？ In rereading The Planet of the Apes with reference to Lotman＇s semiotics of culture, we would like to formulate a response to those questions. Our claim is that the experience of finitude of one＇s own language can make possible an access to the new form of universality requisite for the cross-cultural communication： commonality without common points.展开更多
A Wi-Fi fingerprinting localization approach has attracted increasing attention in recent years due to the ubiquity of Access Point( AP). However,typical fingerprinting localization methods fail to resist accidental e...A Wi-Fi fingerprinting localization approach has attracted increasing attention in recent years due to the ubiquity of Access Point( AP). However,typical fingerprinting localization methods fail to resist accidental environmental changes,such as AP movement. In order to address this problem,a robust fingerprinting indoor localization method is initiated. In the offline phase,three attributes of Received Signal Strength Indication( RSSI) —average,standard deviation and AP's response rate—are computed to prepare for the subsequent computation. In this way,the underlying location-relevant information can be captured comprehensively. Then in the online phase, a three-step voting scheme-based decision mechanism is demonstrated, detecting and eliminating the part of AP where the signals measured are severely distorted by AP 's movement. In the following localization step,in order to achieve accuracy and efficiency simultaneously,a novel fingerprinting localization algorithm is applied. Bhattacharyya distance is utilized to measure the RSSI distribution distance,thus realizing the optimization of MAximum Overlapping algorithm( MAO). Finally,experimental results are displayed,which demonstrate the effectiveness of our proposed methods in eliminating outliers and attaining relatively higher localization accuracy.展开更多
To overcome the problem of existing neighboring access point （AP） discovery methods in WLAN, for example they （PnP） of mul proposed. Us can not provide the accurate neighboring APs information needed for the Plug-...To overcome the problem of existing neighboring access point （AP） discovery methods in WLAN, for example they （PnP） of mul proposed. Us can not provide the accurate neighboring APs information needed for the Plug-and-Play ti-mode APs, three kinds of neighboring AP discovery and information exchange methods are ing these three neighboring AP discovery methods, passive discovery method, active discovery method and station assistant discovery method, the multi-mode AP can discover all neighboring APs and obtain needed information. We further propose two whole process flows, which combine three discovery methods in different manner, to achieve different goals. One process flow is to discover the neighboring AP as fast as possible, called fast discovery process flow. The other is to discover the neighboring AP with minimal interference to neighboring and accuracy of the method is confirmed APs, called the minimal interference process flow. The validity by the simulation.展开更多
基金Supported by the Central-Level Non-Profit Scientific Research Institutes Special Funds(Nos.2014A07XK04,HSY201403)the Harbin Science and Technology Project(No.2012AA6CN037)the National Key Technology Research and Development Program of China(No.2012BAD25B09)
文摘Knowledge of oxygen consumption rates and asphyxiation points in fish is important to determine appropriate stocking and water quality management in aquaculture. The oxygen consumption rate and asphyxiation point in Chanodichthys mongolicus were detected under laboratory conditions using an improved respirometer chamber. The results revealed that more accurate estimates can be obtained by adjusting the volume of the respirometer chamber, which may avoid system errors caused by either repeatedly adjusting fish density or selecting different equipment specifications. The oxygen consumption rate and asphyxiation point of C. mongolicus increased with increasing water temperature and decreasing fish size. Changes in the C. mongolicus oxygen consumption rate were divided into three stages at water temperatures of 11-33~C： （I） a low temperature oxygen consumption rate stage when water temperature was 11-19~C, （2） the optimum temperature oxygen consumption rate stage when water temperature was 19-23~C, and （3） a high temperature oxygen consumption rate stage when water temperature was 〉27~C. The temperature quotients （Q10） obtained suggested that C. mongolicus preferred a temperature range of 19-23~C. At 19~C, C. mongolicus exhibited higher oxygen consumption rates during the day when the maximum values were observed at 10：00 and 14：00 than at night when the minimum occurred at 02：00.
文摘在不均匀光照条件下,光伏阵列输出特性呈现多峰现象,传统的最大功率点跟踪(maximum power point tracking,MPPT)方法容易陷入局部极值。为了提高复杂阴影下的跟踪速度和跟踪精度,结合改进粒子群算法(improved particle swarm optimization,IPSO)和自适应步长扰动观察法(adaptive perturbation and observation,AP&O)各自的特点,提出了基于IPSO-AP&O算法的改进MPPT控制方法。其中,IPSO算法采用自适应惯性权重因子,在不同搜索阶段能够充分搜索目标函数,然后与AP&O算法结合实现最大功率的稳定输出。仿真结果表明,所提出的IPSO-AP&O算法减少了传统智能算法的迭代过程,能快速跟踪到全局最大功率点,相比其余几种算法而言,在光照强度突变时均具备快速精准的双重跟踪能力,在4种场景下跟踪效率分别为99.86%、99.91%、87.63%、99.79%,能够更好地减小光伏阵列外部条件变化导致的功率损耗,所提出的MPPT控制方法能够较好地适用于光储混合系统,具备工程实用价值。
文摘In the science fiction novel titled The Planet of the Apes （1963）, Pierre Boulle tells a story about a completely reversed world where the apes dominate the humans. Coming from the normal world that is ours, a small group of people is totally embarrassed and confused by observing this strange world. On the planet of the apes that they have discovered, it is the apes that are more intelligent than the humans. On the earth, it was the other way around. That observation results in their perplexity. The two communities, human and simian, bear with one another the relationship that corresponds to what Lotman calls ＂enantiomorphic pairings＂. In this context, a series of questions deserves to be raised： Is a ＂common language＂ possible between the two communities in the enantiomorphic pairings？ If the answer is yes, under what conditions could they succeed in opening up a space where they can have something in common？ In rereading The Planet of the Apes with reference to Lotman＇s semiotics of culture, we would like to formulate a response to those questions. Our claim is that the experience of finitude of one＇s own language can make possible an access to the new form of universality requisite for the cross-cultural communication： commonality without common points.
基金Sponsored by the National High Technology Research and Development Program of China(Grant No.2014AA123103)
文摘A Wi-Fi fingerprinting localization approach has attracted increasing attention in recent years due to the ubiquity of Access Point( AP). However,typical fingerprinting localization methods fail to resist accidental environmental changes,such as AP movement. In order to address this problem,a robust fingerprinting indoor localization method is initiated. In the offline phase,three attributes of Received Signal Strength Indication( RSSI) —average,standard deviation and AP's response rate—are computed to prepare for the subsequent computation. In this way,the underlying location-relevant information can be captured comprehensively. Then in the online phase, a three-step voting scheme-based decision mechanism is demonstrated, detecting and eliminating the part of AP where the signals measured are severely distorted by AP 's movement. In the following localization step,in order to achieve accuracy and efficiency simultaneously,a novel fingerprinting localization algorithm is applied. Bhattacharyya distance is utilized to measure the RSSI distribution distance,thus realizing the optimization of MAximum Overlapping algorithm( MAO). Finally,experimental results are displayed,which demonstrate the effectiveness of our proposed methods in eliminating outliers and attaining relatively higher localization accuracy.
基金NTT-DoCoMo Beijing Communication Labs the National High Technology Research and Development Program of China(No.2006AA01Z276).
文摘To overcome the problem of existing neighboring access point （AP） discovery methods in WLAN, for example they （PnP） of mul proposed. Us can not provide the accurate neighboring APs information needed for the Plug-and-Play ti-mode APs, three kinds of neighboring AP discovery and information exchange methods are ing these three neighboring AP discovery methods, passive discovery method, active discovery method and station assistant discovery method, the multi-mode AP can discover all neighboring APs and obtain needed information. We further propose two whole process flows, which combine three discovery methods in different manner, to achieve different goals. One process flow is to discover the neighboring AP as fast as possible, called fast discovery process flow. The other is to discover the neighboring AP with minimal interference to neighboring and accuracy of the method is confirmed APs, called the minimal interference process flow. The validity by the simulation.
