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Hybrid Optoelectronic Bistability in Frequency-Domain and Its Potential Application in FBG Sensors

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Chinese Physics Letters 2008年第12期25卷 4300-4302页

作者：叶红安柳春郁吕国辉辛海英朱晓亮 key lab of Electronic Engineering (heilongjiang province) Heilongjiang University Harbin 150080

We propose a novel optical bistable device （OBD） in frequency-domain with which we can perform optical bistable operations in a number of fibre Bragg gratings （FBGs） which are included in the same OBD. Such an OBD may bring more opportunities in applications and, as an example, we show the possibility of using it in an FBG sensor demodulating system. By use of a tunable light source, consisting of a broad band source and a scanning fibre F-P （FFP）, we demonstrate the above-mentioned operations experimentally.

关键词： field emission molybdenum dioxide enhancement factor

A Novel Micro-Displacement Measuring Method Based on Optical Path Modulation

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Chinese Physics Letters 2010年第7期27卷 119-122页

作者：曲伟叶红安 The key lab of Electronics Engineering College of Heilongjiang Province Heilongjiang University Harbin 150080 College of Electronic Engineering Heilongjiang University Harbin 150080

According to the interference theory of double-grating interferometers, the feature of Moire fringe imaging in each region is investigated and a novel micro-displacement measuring method based on optical path modulation is proposed. The basic measurement principle is that the displacement is measured through Moire fringe shifting, which is caused by the whole phased object thickness variation, in the case of non-relative movement of gratings. The object displacement measured can be changed into the phased object variation inserted in region Ⅱ using a mechanical arrangement. The principle of the micro-displacement measurement is analyzed theoretically. The light intensity of the distributing image in each interference region is given no matter whether we insert the phased object or not. The effect on the Moire fringe of the whole thickness variation of the phased object is also discussed. It is confirmed that the Moire fringe shifts with phased object variation by calculation with MATlab. The experimental result proves that the resolution of this method is 2.1093 μm, and the resolution of the system is 0.5273μm after a four-subdivision circuit.

关键词： MODULATION theory ELECTRIC displacement MOIRE topography INTERFEROMETERS MEASUREMENT OPTICAL properties ELECTRIC interference

OvBNN authentication based on cooperative signature for wireless sensor networks

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High Technology Letters 2018年第3期24卷 287-295页

作者：秦丹阳 Zhang Yan Ma Jingya Ji Ping key lab of Electronic and Communication Engineering Heilongjiang University

The universality of the application of wireless sensor networks( WSN) makes more attention be paid on the security problem. Node authentication is not only the basis of network security,but also the premise of key management and secure routing protocol. Although the signature mechanism based on symmetric encryption is high in energy efficiency,it is vulnerable to be attacked and there is a time delay during authentication. Traditional public key encryption mechanism with improvement in security brings in complex algorithm and costs much time,which is not suitable for WSN. In this paper,a signature authentication mechanism,an optimized variant Bellare Namprempre Neven( OvBNN) is presented to quickly complete the authentication by mutual cooperation between nodes so as to make the nodes use the intermediate calculation results of their neighbor nodes *** results show that the proposed mechanism is superior to traditional authentication mechanisms both in energy consumption and authentication time.

关键词： optimized variant Bellare Namprempre Neven (OvBNN) digital signature authentication speed energy consumption wireless sensor networks (WSN)

Study on key management scheme for heterogeneous wireless sensor networks

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High Technology Letters 2018年第4期24卷 343-350页

作者： Qin Danyang Ma Jingya Zhang Yan Yang Songxiang Ji Ping Feng Pan key lab of Electronic and Communication Engineering Heilongjiang University

Heterogeneous wireless sensor network( HWSN) is composed of different functional nodes and is widely applied. With the deployment in hostile environment,the secure problem of HWSN is of great importance; moreover,it becomes complex due to the mutual characteristics of sensor nodes in HWSN. In order to enhance the network security,an asymmetric key pre-distributed management scheme for HWSN is proposed combining with authentication process to further ensure the network security; meanwhile,an effective authentication method for newly added nodes is presented. Simulation result indicates that the proposed scheme can improve the network security while reducing the storage space requirement efficiently.

关键词： heterogeneous wireless sensor network(HWSN) key management authentication network security storage space

Enhanced Kerr nonlinearity in a left-handed three-level atomic system driven by a bichromatic field

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Chinese Physics B 2013年第11期22卷 304-310页

作者：杨晓雨姜永远 Department of Physics Harbin Institute of Technology key lab of Micro-Optics and Photonic Technology of heilongjiang province

China） Enhanced Kerr nonlinearity in a left-handed atomic system consisting of three levels driven by a bichromatic field is presented in this paper. Based on bichromatic field coherence, the real parts of the permittivity and permeability can obtain negative values simultaneously in the same detuning frequency region. By adjusting the frequency difference and the Rabi frequencies of the bichromatic field, the multi-band left-handed behavior of the presented atomic metamaterial is exhibited. Meanwhile, the enhanced Kerr nonlinearity can be realized in this multi-band left-handed three-level atomic system. It is shown that the third-order susceptibility possesses focusing or defocusing properties in the same frequency band.

关键词： left-handed Kerr nonlinearity bichromatic field multi-band

GmGPDH12,a mitochondrial FAD-GPDH from soybean, increases salt and osmotic stress resistance by modulating redox state and respiration

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The Crop Journal 2021年第1期9卷 79-94页

作者： Ying Zhao Xin Li Zexin Zhang Wenjing Pan Sinan Li Yun Xing Wanying Xin Zhanguo Zhang Zhenbang Hu Chunyan Liu Xiaoxia Wu Zhaoming Qi Dawei Xin Qingshan Chen College of Agriculture Northeast Agricultural UniversityHarbin 150030HeilongjiangChina key lab of Maize Genetics and Breeding Heilongjiang Academy of Agricultural SciencesHarbin 150030HeilongjiangChina College of Agriculture Heilongjiang Bayi Agricultural UniversityDaqing 163319HeilongjiangChina

In plants,glycerol-3-phosphate dehydrogenase(GPDH)catalyzes the interconversion of glycerol-3-phosphate(G3P)and dihydroxyacetone phosphate(DHAP)coupled to the reduction/oxidation of the nicotinamide adenine dinucleotide(NADH)pool,and plays a central role in glycerolipid metabolism and stress *** studies have focused mainly on the NAD+-dependent GPDH isoforms,neglecting the role of flavin adenine dinucleotide(FAD)-dependent *** isolated and characterized three mitochondrialtargeted FAD-GPDHs in soybean,of which one isoform(GmGPDH12)showed a significant transcriptional response to NaCl and mannitol treatments,suggesting the existence of a major FAD-GPDH isoform acting in soybean responses to salt and osmotic *** enzyme kinetic assay showed that the purified GmGPDH12 protein possessed the capacity to oxidize G3P to DHAP in the presence of *** and RNA interference of GmGPDH12 in soybean hairy roots resulted in elevated tolerance and sensitivity to salt and osmotic stress,respectively.G3P contents were significantly lower in GmGPDH12-overexpressing hair roots and higher in knockdown hair roots,indicating that GmGPDH12 was essential for G3P catabolism.A significant perturbation in redox status of NADH,ascorbic acid(ASA)and glutathione(GSH)pools was observed in GmGPDH12-knockdown plants under stress *** impaired redox balance was manifested by higher reactive oxygen species generation and consequent cell damage or death;however,overexpressing plants showed the opposite results for these ***12 overexpression contributed to maintaining constant respiration rates under salt or osmotic stress by regulating mRNA levels of key mitochondrial respiratory *** study provides new evidence for the roles of mitochondria-localized GmGPDH12 in conferring resistance to salt or osmotic stress by maintaining cellular redox homeostasis,protecting cells and respiration from oxidative injury.

关键词： Redox homeostasis Respiration characteristics GmGPDH12 Salt stress Osmotic stress

A novel impedance immunosensor based on O-phenylenediamine modified gold electrode to analyze abscisic acid

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Chinese Chemical Letters 2010年第4期21卷 472-475页

作者： Li, Qian Wang, Ruo Zhong Huang, Zhi Gang Li, He Song Xiao, Lang Tao Hunan Agr Univ Hunan Prov Key Lab Crop Germplasm Innovat & Utili Hunan Prov Key Lab Phytohormones & Growth Dev Changsha 410128 Hunan Peoples R China

An impedance immunosensor based on O-phenylenediamine modified gold electrode for the determination of phytohormone abscisic acid(ABA) was *** operating pH,absorption time,absorption temperature and concentration of anti-ABA antibody were investigated to optimize the analytical *** calibration curve for the determination of ABA was obtained from this impedance immunosensor under optimal *** results showed that the detection limit at about 1 ng/mL in the range of 10-5000 ng/mL...

关键词： O-Phenylenediamine Abscisic acid Immunosensor

Research on stateful public key based secure data aggregation model for wireless sensor networks

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High Technology Letters 2017年第1期23卷 38-47页

作者：秦丹阳 Jia Shuang Yang Songxiang Wang Erfu Ding Qun key lab of Electronic and Communication Engineering Heilongjiang UniversityHarbin 150080P.R.China

Data aggregation technology reduces traffic overhead of wireless sensor network and extends effective working time of the network,yet continued operation of wireless sensor networks increases the probability of aggregation nodes being captured and probability of aggregated data being *** it will seriously affect the security performance of the network. For network security issues,a stateful public key based SDAM( secure data aggregation model) is proposed for wireless sensor networks( WSNs),which employs a new stateful public key encryption to provide efficient end-to-end security. Moreover,the security aggregation model will not impose any bound on the aggregation function property,so as to realize the low cost and high security level at the same time.

关键词： wireless sensor networks ( WSNs) secure data aggregation homomorphic encryp-tion simple power analysis

Simultaneous detection of different serum pepsinogens and its primary application

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World Journal of Gastroenterology 2010年第24期16卷 3072-3077页

作者： Zhang, Jue Guo, Ji-Zhong Xiao, Hua-Long Zhu, Lan Liu, Hai-Yan Zhang, Yi Huang, Biao Minist Publ Hlth Jiangsu Key Lab Mol Nucl Med Key Lab Nucl Med Wuxi 214063 Jiangsu Prov Peoples R China Wuxi Peoples Hosp Wuxi 214023 Jiangsu Prov Peoples R China

AIM: To develop the simple, rapid and sensitive dual-label time-resolved fluoroimmunoassay for pepsinogens in human ***: Based on two-site sandwich protocol, mono-clonal antibodies (McAbs) against pepsinogen Ⅰ (PG Ⅰ) and PG Ⅱ were co-coated in 96 microtitration wells, and tracer McAbs against PG Ⅰ and PG Ⅱ were labeled with europium (Eu) and samarium (Sm) chelate, respectively. Diluted serum samples of Eu3+- and Sm3+-McAbs were added into microtitration wells simultaneously. After washing, fluorescence of bound Sm3+ and Eu3+ tracers was detected. RESULTS: The detection limit was 0.2 μg/L for PG Ⅰ and 0.05 μg/L for PG Ⅱ. The assay range was 5.0-320.0 μg/Lfor PG Ⅰ and 1.0-55.0 μg/L for PG Ⅱ. The average re-covery rate was 102.7% for PG Ⅰ and 98.8% for PG Ⅱ. Sera from healthy controls and patients with gastric dis-ease were analyzed. The PG detected by dual-label as-say was in good agreement with that detected by single-label assay or by enzyme-linked immunosorbent assay. CONCLUSION: Dual-label assay can provide high-throughput serological screening for gastric diseases.

关键词： Serum pepsinogen Simultaneous detection Time-resolved fluoroimmunoassay