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| 1 | A Survey of Security Issues in Cognitive Radio Networks显示文摘In the last decade,cognitive radio(CR) has emerged as a major next generation wireless networking technology,which is the most promising candidate solution to solve the spectrum scarcity and improve the spectrum utilization.However,there exist enormous challenges for the open and random access environment of CRNs,where the unlicensed secondary users(SUs) can use the channels that are not currently used by the licensed primary users(PUs) via spectrum-sensing technology.Because of this access method,some malicious users may access the cognitive network arbitrarily and launch some special attacks,such as primary user emulation attack,falsifying data or denial of service attack,which will cause serious damage to the cognitive radio network.In addition to the specifi c security threats of cognitive network,CRNs also face up to the conventional security threats,such as eavesdropping,tampering,imitation,forgery,and noncooperation etc..Hence,Cognitive radio networks have much more risks than traditional wireless networks with its special network model.In this paper,we considered the security threats from passive and active attacks.Firstly,the PHY layer security is presented in the view of passive attacks,and it is a compelling idea of using the physical properties of the radio channel to help provide secure wireless communications.Moreover,malicious user detection is introduced in the view of active attacks by means of the signal detection techniques to decrease the interference and the probabilities of false alarm and missed detection.Finally,we discuss the general countermeasures of security threats in three phases.In particular,we discuss the far reaching effect of defensive strategy against attacks in CRNs. | LI Jianwu FENG Zebing FENG Zhiyong ZHANG Ping | 2015 | China Communications2015，12，3： | 9 |
| 2 | The nitritation performance of biofilm reactor for treating domestic wastewater under high dissolved oxygen显示文摘The objective of this study was to investigate the nitritation performance in a biofilm reactor for treating domestic wastewater.The reactor was operated in continuous feed mode from phases 1 to 3.The dissolved oxygen(DO)was controlled at 3.5–7 mg/L throughout the experiment.The biofilm reactor showed excellent nitritation performance after the inoculation of nitrifying sludge,with the hydraulic retention time being reduced from 24 to 7 hr.Above 90%nitrite accumulation ratio(NAR)was maintained in phase 1.Afterwards,nitratation occurred with the low NH_4^+–N concentration in the reactor.The improvement of NH_4^+–N concentration to 20–35 mg/L had a limited effect on the recovery of nitritation.However,nitritation recovered rapidly when sequencing batch feed mode was adopted in phase 4,with the effluent NH_4^+-N concentration above 7 mg/L.The improvement of ammonia oxidizing bacteria(AOB)activity and the combined inhibition effect of free ammonia(FA)and free nitrous acid(FNA)on the nitrite oxidizing bacteria(NOB)were two key factors for the rapid recovery of nitritation.Sludge activity was obtained in batch tests.The results of batch tests had a good relationship with the long term operation performance of the biofilm reactor. | Zhaoming Zheng Zebing Li Jing Ma Jia Du Guanghui Chen Wei Bian Jun Li Baihang Zhao | 2016 | Journal of Environmental Sciences2016，28，4： | 7 |
| 3 | Ultraprecision intersatellite laser interferometry显示文摘Precision measurement tools are compulsory to reduce measurement errors or machining errors in the processes of calibration and manufacturing.The laser interferometer is one of the most important measurement tools invented in the 20th century.Today,it is commonly used in ultraprecision machining and manufacturing,ultraprecision positioning control,and many noncontact optical sensing technologies.So far,the state-of-the-art laser interferometers are the ground-based gravitational-wave detectors,e.g.the Laser Interferometer Gravitational-wave Observatory(LIGO).The LIGO has reached the measurement quantum limit,and some quantum technologies with squeezed light are currently being tested in order to further decompress the noise level.In this paper,we focus on the laser interferometry developed for space-based gravitational-wave detection.The basic working principle and the current status of the key technologies of intersatellite laser interferometry are introduced and discussed in detail.The launch and operation of these large-scale,gravitational-wave detectors based on space-based laser interferometry is proposed for the 2030s. | Min Ming Yingxin Luo Yu-Rong Liang Jing-Yi Zhang Hui-Zong Duan Hao Yan Yuan-Ze Jiang Ling-Feng Lu Qin Xiao Zebing Zhou Hsien-Chi Yeh | 2020 | International Journal of Extreme Manufacturing2020，2，2： | 3 |
| 4 | Soft computing-based predictive modeling of flexible electrohydrodynamic pumps显示文摘Flexible electrohydrodynamic(EHD)pumps have been developed and applied in many fields due to no transmission structure,no wear,easy manipulation,and no noise.Physical simulation is often used to predict the output performance of flexible EHD pumps.However,this method neglects fluid–solid interaction and energy loss caused by flexible materials,which are both difficult to calculate when the flexible pumps deform.Therefore,this study proposes a flexible pump output performance prediction using machine learning algorithms.We used three different types of machine learning:random forest regression,ridge regression,and neural network to predict the critical parameters(pressure,flow rate,and power)of the flexible EHD pump.Voltage,angle,gap,overlap,and channel height are selected as five input data of the neural network.In addition,we optimized essential parameters in the three networks.Finally,we adopt the best predictive model and evaluate the significance of five input parameters to the output performance of the flexible EHD pumps.Among the three methods,the MLP model has exceptionally high accuracy in predicting pressure and flow.Our work is beneficial for the design process of fluid sources in flexible soft actuators and soft hydraulic sources in microfluidic chips. | Zebing Mao Yanhong Peng Chenlong Hu Ruqi Ding Yuhei Yamada Shingo Maeda | 2023 | Biomimetic Intelligence & Robotics2023，3，3： | 2 |
| 5 | Balancing diets for physically effective fibre and ruminally degradable starch:A key to lower the risk of subacute rumen acidosis and improve productivity of dairy cattle 显示文摘 | Zebeli Q Mansmann D Steingass H | 2010 | Livestock Science2010，127，1： | 1 |
| 6 | Serum level of interleukin-8 is elevated in idiopathic pulmonary fibrosis and indicates disease activity显示文摘 | Ziegenhagen MW Zebe IP Zissel | 1998 | AMJ Respircritcare Med1998，157，3： | 1 |
| 7 | Cattle's variation in rumen ecology and metabolism and its contributions to feed efficiency显示文摘 | KHIAOSA-ARD R ZEBELI Q | 2014 | Livest Sci2014，162，66： | 1 |
| 8 | Serum level of interleukin28 is elevated in idiopathic pulmonary fibrosis and indicates disease aetivity显示文摘 | Ziegenhagen MW Zebe IP Zissel | 1998 | AMJ Resp ireriteare Med1998，157，3： | 1 |
| 9 | Feeding barley grain steeped in lactic acid modulates rumen fermentation patterns and increases milk fat content in dairy cows 显示文摘 | IQBAL S ZEBELI Q MAZZOLARI A | 2009 | Journal of Dairy Science2009，92，12： | 1 |
| 10 | Feeding rolled barley grain steeped in lactic acid modulated en- ergy status and innate immunity in dairy cows 显示文摘 | IQBAL S ZEBELI Q MAZZOLARI A | 2010 | Journal of Dairy Science2010，93，11： | 1 |
| 11 | STGSA:A Novel Spatial-Temporal Graph Synchronous Aggregation Model for Traffic Prediction显示文摘The success of intelligent transportation systems relies heavily on accurate traffic prediction,in which how to model the underlying spatial-temporal information from traffic data has come under the spotlight.Most existing frameworks typically utilize separate modules for spatial and temporal correlations modeling.However,this stepwise pattern may limit the effectiveness and efficiency in spatial-temporal feature extraction and cause the overlook of important information in some steps.Furthermore,it is lacking sufficient guidance from prior information while modeling based on a given spatial adjacency graph(e.g.,deriving from the geodesic distance or approximate connectivity),and may not reflect the actual interaction between nodes.To overcome those limitations,our paper proposes a spatial-temporal graph synchronous aggregation(STGSA)model to extract the localized and long-term spatial-temporal dependencies simultaneously.Specifically,a tailored graph aggregation method in the vertex domain is designed to extract spatial and temporal features in one graph convolution process.In each STGSA block,we devise a directed temporal correlation graph to represent the localized and long-term dependencies between nodes,and the potential temporal dependence is further fine-tuned by an adaptive weighting operation.Meanwhile,we construct an elaborated spatial adjacency matrix to represent the road sensor graph by considering both physical distance and node similarity in a datadriven manner.Then,inspired by the multi-head attention mechanism which can jointly emphasize information from different r epresentation subspaces,we construct a multi-stream module based on the STGSA blocks to capture global information.It projects the embedding input repeatedly with multiple different channels.Finally,the predicted values are generated by stacking several multi-stream modules.Extensive experiments are constructed on six real-world datasets,and numerical results show that the proposed STGSA model significantly outperforms the benchmarks. | Zebing Wei Hongxia Zhao Zhishuai Li Xiaojie Bu Yuanyuan Chen Xiqiao Zhang Yisheng Lv Fei-Yue Wang | 2023 | IEEE/CAA Journal of Automatica Sinica2023，10，1： | 1 |
| 12 | Treating barley grain with lactic acid and heat prevented sub-a- cute ruminal acidosis and increased milk fat content in dairy cows 显示文摘 | IQBAL S TERR1LL S J ZEBELI Q | 2012 | Animal Feed Science and Technology2012，172，34： | 1 |
| 13 | Perturbations of plasma metabolites correlated with the rise of tureen endotoxin in dairy cows fed diets rich in easily degradable carbohydrates 显示文摘 | Zebeli Q Dunn S M Ametaj B N | 2011 | J Dairy Sci2011，94，5： | 1 |
| 14 | Balancing diets for physically effective fibre and ruminally degradable starch: A key to lower the risk of sub- acute rumen acidosis and improve productivity of dairy cattle显示文摘 | Zebeli Q Mansmann D Steingass H | 2010 | Livestock Sci?ence2010，127，： | 1 |
| 15 | Effects of physically effective fiber on digestive processes and milk fat content in early lactating dairy cows fed total mixed rations显示文摘 | Zebeli Q Tafaj M Steingass H et ol | 2006 | J Dairy Sci2006，89，： | 1 |
| 16 | Relationships between rumen lipopolysaccharide and mediators of inflammatory response with milk fat production and efficiency in dairy cows显示文摘 | Q. Zebeli B.N. Ametaj | 2009 | Journal of Dairy Science2009，，8： | 1 |
| 17 | A meta-analysis examining effects of particle size of total mixed rations on intake, rumen digestion and milk production in high-yielding dairy cows in early lactation显示文摘 | Tafaj M Zebeli Q Baes C H etal | 2007 | Anim Feed Sci Technol2007，138，： | 1 |
| 18 | Evaluation of the response of ruminal fermentation and activities of non-starch polysaccharide degrading enzymes to particle length of corn silage in dairy cows 显示文摘 | Zebeli Q Tafaj M Junck B | 2008 | J Dairy Sci2008，91，： | 1 |
| 19 | Metabo- lomics reveals unhealthy alterations in rumen metabo- lism with increased proportion of cereal grain in the diet of dairy cows 显示文摘 | AMETAJ B N ZEBELI Q SALEEM F | 2010 | Metabolomics2010，6，4： | 1 |
| 20 | Serum level of interleukin-8 is elevated in idiopathic pulmonary fibrosis and indicates disease activity显示文摘 | Ziegenhagen MW Zebe IP Zissel G | 2005 | AMJ Respircritcare Med2005，157，3： | 1 |
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