Energy-Efficiency and Transmission Strategy Selection in Cooperative Wireless Sensor Networks

Zhang, Yanbing,Dai, Huaiyu The Korea Institute of Information and Commucation 2007 Journal of communications and networks Vol.9 No.4

Energy efficiency is one of the most critical concerns for wireless sensor networks. By allowing sensor nodes in close proximity to cooperate in transmission to form a virtual multiple-input multiple-output(MIMO) system, recent progress in wireless MIMO communications can be exploited to boost the system throughput, or equivalently reduce the energy consumption for the same throughput and BER target. However, these cooperative transmission strategies may incur additional energy cost and system overhead. In this paper, assuming that data collectors are equipped with antenna arrays and superior processing capability, energy efficiency of relevant traditional and cooperative transmission strategies: Single-input-multiple-output(SIMO), space-time block coding(STBC), and spatial multiplexing(SM) are studied. Analysis in the wideband regime reveals that, while receive diversity introduces significant improvement in both energy efficiency and spectral efficiency, further improvement due to the transmit diversity of STBC is limited, as opposed to the superiority of the SM scheme especially for non-trivial spectral efficiency. These observations are further confirmed in our analysis of more realistic systems with limited bandwidth, finite constellation sizes, and a target error rate. Based on this analysis, general guidelines are presented for optimal transmission strategy selection in system level and link level, aiming at minimum energy consumption while meeting different requirements. The proposed selection rules, especially those based on system-level metrics, are easy to implement for sensor applications. The framework provided here may also be readily extended to other scenarios or applications.

Fabrication of Mn-FeOx/CNTs Catalysts for Low-Temperature NO Reduction with NH3

Yanbing Zhang,Zhe Xu,Xie Wang,Xiulian Lu,Yuying Zheng 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.4

Mn-FeOx/carbon nanotubes (CNTs) catalysts were firstly prepared via simple incipient wetness method and used for low-temperature selective catalytic reduction (SCR) of NO with NH3. The structure and surface properties of the catalysts were characterized by N2 sorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction by hydrogen (H2-TPR). It was found that Mn-FeOx/CNTs catalyst exhibited excellent low-temperature SCR activity and SO2 resistance. XRD patterns revealed that metal oxides catalysts were possessed of amorphous structure. FESEM and TEM images showed that metal oxides catalysts were successfully supported on CNTs. The XPS results indicated that the obtained catalyst presented high Mn4+/Mn3+ and OS/(OS+OL) ratios. The H2-TPR profiles showed that Mn-FeOx/CNTs catalyst possessed better low-temperature reducibility. Besides, the obtained catalyst exhibited better SO2 resistance.

Real-time Detection and Recognition of Landmarks for Mobile Robot in Indoor Scenes

Yanbing Xue,Hua Zhang,Yucui Ju,Jin Wang 보안공학연구지원센터 2013 International Journal of Multimedia and Ubiquitous Vol.8 No.4

A fancy hydrangea shape bimetallic Ni-Mo oxide of remarkable catalytic effect for hydrogen storage of MgH2

Jiaqi Zhang,Quanhui Hou,Yanbing Liu,Xinglin Yang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-

The design of catalysts with excellent catalytic activity plays an important role in the field of solid-statehydrogen storage of new energy sources. Herein, a novel hydrangea-like NiO@NiMoO4 composite catalystwas prepared through a facile hydrothermal reaction. Subsequently, NiO@NiMoO4 was doped into MgH2by ball milling to solve the problems of high dehydrogenation temperature and slow desorption kineticsof MgH2. It can be seen from the experimental results that the MgH2 + 10 wt% NiO@NiMoO4 compositestarts to dehydrogenate at about 190 C, which is about 170 C lower than that of pure MgH2. Meanwhile,after complete dehydrogenation, the composites can start to absorb hydrogen below 40 C. Comparedwith pure MgH2, the activation energy of hydrogen absorption and dehydrogenation of the compositedecreased by 47.6 kJ/mol and 46.5 kJ/mol, respectively. In 10th cycle tests, the MgH2 + 10 wt%NiO@NiMoO4 composite still has good cycle stability. After adding a small amount of biomass charcoal,the hydrogen storage capacity can even be maintained above 97%. Furthermore, the characterizationresults show that the in situ generated new species Mo and Mg2Ni/Mg2NiH4 synergistically promotethe adsorption and dissociation of hydrogen. This new synergistic mechanism provides new comprehensiveinsights for improving reversible hydrogen storage in MgH2.

Modular DC Solid State Transformer with Fault-Tolerant Function

Xiangqi Meng,Yanbing Jia,Chunguang Ren,Xiaoqiang Lin,Baifu Zhang 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5

A modularized control method with faulttolerant function is proposed under the condition that a module of DC solid state transformer (DCSST) fails due to input short circuit. The decoupling control strategy is deduced by establishing the mathematic model of the DCSST. The maximum input voltage is selected as the reference voltage by adding diodes at the input side. The proposed system can automatically adjust the input voltage reference to keep the output voltage stability for the module in DCSST with short-circuit fault. Simulation and experiment results show that the proposed control method can decouple the output voltage and the input average voltage, maintain the output voltage stable and improve the reliability of the system when a short circuit occurs in a module of DCSST.

The Evolutionary Response of Alcohol Dehydrogenase and Aldehyde Dehydrogenases of Acetobacter pasteurianus CGMCC 3089 to Ethanol Adaptation

Yu Zheng,Keping Zhang,Guangyu Su,Qi Han,Yanbing Shen,Min Wang 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.1

The acetic acid bacterium Acetobacter pasteurianus is used for vinegar fermentation with ethanol as a substrate. However, growth of A. pasteurianus is inhibited by high ethanol concentrations. The ethanol resistance of A. pasteurianus CGMCC 3089 was improved using a continuous ethanol stress adaptation culture. Characterization studies of strains during evolutionary processes were performed for improved ethanol resistance by comparison of cell growth and alcohol dehydrogenase (ADH) and aldehyde dehydrogenases (ALDH) activities. Improved resistance against ethanol was an inheritable phenotype instead of a transient physiologic adaptation. The evolutionary response of ADH and ALDH to high concentrations of ethanol was responsible for the ethanol resistance of A. pasteurianus, instead of mutations in the open reading frames of ADH and ALDH, or long nucleotide sequence insertion or deletion in the genome.

Complete Genome Sequencing and Infectious cDNA Clone Construction of Soybean Mosaic Virus Isolated from Shanxi

Defu Wang,Liyan Cui,Li Zhang,Zhennan Ma,Yanbing Niu 한국식물병리학회 2021 Plant Pathology Journal Vol.37 No.2

Soybean mosaic virus (SMV) is the predominant viral pathogen that affects the yield and quality of soy- bean. The natural host range for SMV is very narrow, and generally limited to Leguminosae. However, we found that SMV can naturally infect Pinellia ternata and Atractylodes macrocephala. In order to clarify the molecular mechanisms underlying the cross- family infection of SMV, we used double-stranded RNA extraction, rapid amplification of cDNA ends polymerase chain reaction and Gibson assembly tech- niques to carry out SMV full-length genome amplifi- cation from susceptible soybeans and constructed an infectious cDNA clone for SMV. The genome of the SMV Shanxi isolate (SMV-SX) consists of 9,587 nt and encodes a polyprotein consisting of 3,067 aa. SMV-SX and SMV-XFQ008 had the highest nucleotide and ami- no acid sequence identities of 97.03% and 98.50%, re- spectively. A phylogenetic tree indicated that SMV-SX and SMV-XFQ018 were clustered together, sharing the closest relationship. We then constructed a pSMV-SX infectious cDNA clone by Gibson assembly technology and used this clone to inoculate soybean and Ailanthus altissima; the symptoms of these hosts were similar to those caused by the virus isolated from natural infected plant tissue. This method of construction not only makes up for the time-consuming and laborious defect of traditional methods used to construct infec- tious cDNA clones, but also avoids the toxicity of the Potyvirus special sequence to Escherichia coli, thus providing a useful cloning strategy for the construction of infectious cDNA clones for other viruses and laying down a foundation for the further investigation of SMV cross-family infection mechanisms.

Determination of Herbicide Propisochlor in Soil, Water and Rice by Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) Method Using by UPLC-ESI-MS/MS

Wu, Xiaohu,Xu, Jun,Liu, Xingang,Dong, Fengshou,Wu, Yanbing,Zhang, Ying,Zheng, Yongquan Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.3

A simple, quick and reliable analytical method for the confirmation and quantification of propisochlor was developed. The propisochlor was extracted from water, soil and rice (stalks, rice and hull) matrices using acetonitrile, and cleaned up with primary secondary amine and determined by UPLC-MS/MS. The LODs of propisochlor ranged from 0.03 ${\mu}g/kg$ to 0.12 ${\mu}g/kg$, while the LOQs ranged from 0.1 ${\mu}g/kg$ to 0.4 ${\mu}g/kg$ in different matrixes. The mean recoveries of propisochlor at three levels (0.005, 0.01 and 0.05 mg/kg) were in the range of 73.7-94.9% with intra-day relative standard deviations (RSD) of 1.1-13.9% and inter-day $RSD_R$ of 3.3-12.7%. This method is suitable for routine analysis of propisochlor under field conditions. The half-lives of propisochlor in rice stalks, water and soil were 1.7, 1.5 and 2.3 days in Hunan, 5.7, 1.0 and 1.9 days in Anhui and 4.8, 1.0 and 3.1 days in Guangxi.

Determination of Herbicide Propisochlor in Soil, Water and Rice by Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) Method Using by UPLC-ESI-MS/MS

Xiaohu Wu,Jun Xu,Xingang Liu,Feng Shou Dong,Yanbing Wu,Ying Zhang,Yongquan Zheng 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.3

A simple, quick and reliable analytical method for the confirmation and quantification of propisochlor was developed. The propisochlor was extracted from water, soil and rice (stalks, rice and hull) matrices using acetonitrile, and cleaned up with primary secondary amine and determined by UPLC-MS/MS. The LODs of propisochlor ranged from 0.03 μg/kg to 0.12 μg/kg, while the LOQs ranged from 0.1 μg/kg to 0.4 μg/kg in different matrixes. The mean recoveries of propisochlor at three levels (0.005, 0.01 and 0.05 mg/kg) were in the range of 73.7-94.9% with intra-day relative standard deviations (RSD) of 1.1-13.9% and inter-day RSDR of 3.3-12.7%. This method is suitable for routine analysis of propisochlor under field conditions. The half-lives of propisochlor in rice stalks, water and soil were 1.7, 1.5 and 2.3 days in Hunan, 5.7, 1.0 and 1.9 days in Anhui and 4.8, 1.0 and 3.1 days in Guangxi.

Seroprevalence of Dirofilaria immitis in Cats from Liaoning Province, Northeastern China

Honglie Hou,Lili Cao,Wenzhi Ren,Dansheng Wang,He Ding,Juan You,Xinhua Yao,Hang Dong,Yanbing Guo,Shuxian Yuan,Xi-Chen Zhang,Pengtao Gong 대한기생충학ㆍ열대의학회 2017 The Korean Journal of Parasitology Vol.55 No.6

The present study was performed to investigate the seroprevalence and risk factors for Dirofilaria immitis infection in cats from Liaoning province, northeastern China. From October 2014 to September 2016, sera of 651 cats, including 364 domestic cats and 287 feral cats (332 females and 319 males) were assessed. They were tested for the presence of D. immitis antigen using SNAP Heartworm RT test kit. In this population, the average prevalence was 4.5%. Age and rearing conditions (feral or domestic) were found to be associated with the prevalence of D. immitis. The prevalence was significantly higher in feral cats compared with domestic cats (8.4% vs 1.4%, P<0.01). There was no significant difference between males and females (4.7% vs 4.2%, P>0.05), but older cats (≥3 years old) showed a statistically higher prevalence compared with younger cats (<3 years old) in feral populations (16.8 vs 2.4%, P<0.01), while the difference between the age groups was not statistically significant in domestic cats (2.4% vs 0.51%, P>0.05), all these results suggest that outdoor exposure time may be one of the most important factors for D. immitis prevalence in cats. Results reveal that D. immitis are prevalence in domestic and feral cats in northeastern China, which indicates that appropriate preventive measures should be taken to decrease the incidence of feline heartworm disease in Liaoning province, northeastern China.