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Linearly Polarized Polarization-Maintaining Er^(3+)-Doped Fluoride Fiber Laser in the Mid-Infrared

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Journal of Electronic Science and Technology 2022年第1期20卷 1-8页

作者： hong-Yu luo Yong-Zhi wang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054

We demonstrated the~2.8-μm and~3.5-μm linearly polarized continuous wave(CW)laser outputs from a polarization-maintaining(PM)Er^(3+)-doped fluoride fiber *** introducing a film polarizer into the cavity to select the laser polarization orientation,the~2.8-μm linearly polarized CW laser with a high polarization extinction ratio(PER)of~23 dB and maximum output power of 2.37 W was achieved under double-end pumping at 976 *** adding another 1981-nm pump source simultaneously,the~3.5-μm linearly polarized CW laser was also obtained,giving higher PER of~27 dB and maximum output power of 307 mW which is only limited by the available power of 1981-nm *** the best of our knowledge,this is the first report on a mid-infrared linearly polarized CW PM fiber laser in the>2.5-μm mid-infrared *** work not only opens up opportunities for some new mid-infrared applications,but also provides a promising platform for developing high-stability and versatile mid-infrared laser sources.

关键词： Fiber laser linearly polarized mid-infrared polarization-maintaining(PM)

Improved Prefix Based Format-Preserving Encryption for Chinese Names

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China Communications 2018年第3期15卷 78-90页

作者： Junwei Zou Peng wang hong luo School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications

In the era of big data, government, business and personal digital information will be possible for data mining. Data mining requires massive data as a support. However, the direct release of the original mass data, which usually contain some sensitive information of personal or analysis, will result in leakage of user privacy. Therefore, it is becoming increasingly important to protect privacy information in data publishing. In this paper, we focus on the multi-type self-identified format-preserving encryption. First, we introduce a multi-type self-identified format-preserving encryption system and discuss the encryption of various types of data in this system. Then, for the format preserving encryption(FPE) about Chinese name, we study from the encryption model construction and basic encryption scheme. The format-preserving encryption model about Chinese name is constructed and the concept of the name library is presented. Based on this, it is used to not only limit the message space to reduce complexity, but also ensure the cipher in accordance with the Chinese naming habits. In addition, according to the encryption and decryption model, format-preserving encryption process of Chinese name is designed. In order to add new names, the algorithm of name space expansion is proposed. Based on the Prefix, this paper put forward an algorithm named Cycle-Prefix, which enhances the security and dynamics of FPE by using two adjustment factors and the circular encryption. Compared with the traditional Prefix algorithm, experiments show that Cycle-Prefix can not only complete the task of FPE for Chinese name, but also encrypt same plain text into different ciphers under the premise of similar efficiency with Prefix.

关键词： Chinese name format-preservingencryption name library encryption model

Per-unit Scheme for Integrated Solution of Hybrid Power-water Flow Problem

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Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 680-685页

作者： Xia Zhao hong Tan luo wang Mingyi Sun State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqingChina

When applying the widely-used Newton-Raphson(N-R)method to the integrated solution of the hybrid power-water flow problem of the power-water integrated energy system(PW-IES),it is found that there are numerical differences among Jacobian elements,which may yield an ill-conditioned Jacobian matrix and even cause convergence ***,this letter proposes to per-unitize the water distribution network(WDN)to reduce the numerical differences and thus to improve the Jacobian matrix conditioning and the integrated N-R solution to the hybrid power-water flow problem.

关键词： Integrated energy system load flow Newton-Raphson method water distribution network power-water flow

Multi-attribute-Based Access Control Policy for Supply Chain Data Service

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Chinese Journal of Electronics 2018年第6期27卷 1283-1290页

作者： ZOU Junwei LAN Jiewei wang Xiaoke luo hong School of Electronic Engineering Beijing University of Posts and Telecommunications School of Computer Science Beijing University of Posts and Telecommunications School of Information and Communication Engineering Beijing University of Posts and Telecommunications

The Electronic product code(EPC) network is established and maintained in worldwide-scale based on the EPC standard framework to guarantee the real-time information recognition, and provide efficient management for supply chain. In EPC network, a series of data services can be provided due to the requirements of users. Aiming to guarantee the security of data services, we propose a dynamic access control model for data services based on multiple attributes. We extract specific attribute sets from user, and calculate security level of user using certainty and uncertainty theories based on the attribute sets. The data can be provided to users according to the security level of user and data. The security of data in the supply chain can be guaranteed, and data acquisition can be dynamic and fine-grained. We deploy the proposed model to real supply chain management system we built to verify effectiveness and feasibility of the solution.

关键词： EPCglobal Supply chain Data service Access control

Texture evolution behavior and anisotropy of 2A97 Al-Li alloy during recrystallization at elevated temperature

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Rare Metals 2023年第9期42卷 3139-3149页

作者： Dong wang Chong Gao hong-Yun luo Yong-hong Yang Yue Ma School of Materials Science and Engineering Beihang UniversityBeijing100191China China Alco Research Institute of Science and Technology Beijing100082China Xi’an Aerospace Propulsion Institute Xi’an National Civil Aerospace Industrial BaseXi’an710100China

2A97 Al-Li alloy was cold-rolled to 2 mm and then thermally exposed at different temperatures for 1 h and at 723 K for different time,*** texture evolution behavior and the anisotropy of 2A97 Al-Li alloy were *** result shows that the{001}and{011}textures are the dominant recrystallization ***{124}texture is the final recrystallization *** case of low-temperature thermal exposure(473,573 K),the{011}texture is aggregated to the{112}and{123}*** the recrystallization at 723 K,the{001},{111}and{011}textures are the intermediate transition grain *** concurrent precipitation of Al_(20)Cu_(2)Mn_(3)and Al_(3)Zr results in the occurrence of unusually sharp{011}and{001}texture components during *** alloy with both recrystallization and deformation texture possesses the smallest anisotropic,and the texture is the direct reason that results in the anisotropy.

关键词： Al-Li alloy 2A97 Crystallographic texture Texture evolution Anisotropy

Reduced graphene oxide-supported CoP nanocrystals confined in porous nitrogen-doped carbon nanowire for highly enhanced lithium/sodium storage and hydrogen evolution reaction

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Nano Research 2019年第11期12卷 2872-2880页

作者： Xiaojun Zhao Dan luo Yan wang Zhi-hong Liu Key Laboratory for Macromolecular Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an710062China

Rational synthesis of a hierarchical porous architecture with highly active and consecutive conductive network is very critical to achieve the high-performance of nanomaterials in electrochemical energy conversion and *** propose here a hierarchical micro-/nanostructured hybrids constructed by the dual carbon shell nanowire host containing CoP nanocrystals of several nanometers,which generates Co-based metal-organic framework on graphene oxide nanosheets in situ and followed a direct phosphorization(CoP@NC/rGO).The dual carbon shell,consisting of Co-based metal-organic framework derived porous doped carbon(NC)and reduced graphene oxide(rGO),can not only impedes CoP nanocrystals from coalescing,and renders highly exposed the electrochemically accessible active sites,but also provides the multidimensional pathways for rapid electron and ion *** importantly,the covered dual carbon shell on CoP nanocrystals plays a role as a protective layer to impede the nanocrystals’*** virtue of compositional and structural advantages,the micro-/nanostructured CoP@NC/rGO hybrids manifest outstanding energy storage properties when evaluated as anodes for lithium/sodium ion ***,it also reveals highly efficient electrocatalytic performance for hydrogen evolution reaction in acid media with low Tafel slope,overpotential and robust durability.

关键词： micro-/nanostructured metal-organic framework CoP@NC/rGO lithium/sodium ion batteries hydrogen evolution reaction

Model predictive control for adaptive cruise control with multi-objectives: comfort,fuel-economy,safety and car-following

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第3期11卷 191-201页

作者： Li-hua luo hong LIU Ping LI Hui wang State Key Laboratory of Industrial Control Technology Zhejiang UniversityHangzhou 310027China

For automated vehicles,comfortable driving will improve passengers’ *** fuel consumption brings economic profits for car owners,decreases the impact on the environment and increases energy *** addition to comfort and fuel-economy,automated vehicles also have the basic requirements of safety and *** this purpose,an adaptive cruise control (ACC) algorithm with multi-objectives is proposed based on a model predictive control (MPC) *** the proposed ACC algorithm,safety is guaranteed by constraining the inter-distance within a safe range; the requirements of comfort and car-following are considered to be the performance criteria and some optimal reference trajectories are introduced to increase *** performances of the proposed ACC algorithm are simulated and analyzed in five representative traffic scenarios and multiple *** results show that not only are safety and car-following objectives satisfied,but also driving comfort and fuel-economy are improved significantly.

关键词： Adaptive cruise control (ACC) Multi-objectives Comfort Fuel-economy Model predictive control (MPC)

Cognitive training for elderly patients with early Alzheimer’s disease in the Qinghai-Tibet Plateau: A pilot study

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World Journal of Clinical Cases 2022年第23期10卷 8133-8140页

作者： Xiao-hong wang Ming-Qin luo Department of Geriatrics Qinghai Provincial People's HospitalXining 810007Qinghai ProvinceChina Department of Nursing Qinghai Provincial People's HospitalXining 810007Qinghai ProvinceChina

BACKGROUND Alzheimer’s disease(AD)influences the social and economic quality of life of older adult patients and their *** To explore the efficacy of cognitive training in clinical nursing for patients with early AD residing in the plateau *** This pilot study was conducted in patients with early AD treated in the Geriatric Department of the Qinghai Provincial People’s Hospital between August 2019 and March *** patients were divided into a cognitive training group and a conventional nursing group using the random number table *** in the conventional nursing group received conventional nursing,whereas the patients in the cognitive training group received the new nursing *** mini-mental state examination(MMSE)and activities of daily living(ADL)scales were used to compare the cognitive ability and daily activities,respectively,between the two groups before and after the *** Sixty patients were enrolled in this study,with 30 patients in the cognitive training group and conventional nursing group,*** MMSE and ADL scores were significantly higher in the cognitive training group than in the conventional nursing group after the intervention(MMSE:25.11±2.02 vs 22.26±1.23,P=0.032;ADL:68.72±4.86 vs 60.16±2.27,P=0.018).CONCLUSION The application of cognitive training in clinical nursing for patients with early AD could improve both their cognitive ability and *** method could be applied in clinical practice to manage cognitive dysfunction in patients with early AD.

关键词： Alzheimer’s disease Cognitive dysfunction Cognitive neuroscience Neurodegenerative diseases Nursing

ASYMPTOTIC DISTRIBUTION IN DIRECTED FINITE WEIGHTED RANDOM GRAPHS WITH AN INCREASING BI-DEGREE SEQUENCE

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Acta Mathematica Scientia 2020年第2期40卷 355-368页

作者： Jing luo hong QIN Zhenghong wang Department of Statistics South-Central University for NationalitiesWuhan 430074China Department of Statistics Zhongnan University of Economics and LawWuhan 430073China

The asymptotic normality of the fixed number of the maximum likelihood estimators(MLEs)in the directed finite weighted network models with an increasing bi-degree sequence has been established *** this article,we further derive the central limit theorem for linear combinations of all the MLEs with an increasing dimension when the edges take finite discrete *** studies are provided to illustrate the asymptotic results.

关键词： Central limit theorem finite discrete network increasing number of parameters maximum likelihood estimator