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A Facile Approach for Synthesis of Benzofuro[2,3-c]pyridines via Intramolecular Cascade Annulations

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Chinese Journal of Chemistry 2014年第11期32卷 1103-1106页

作者： ying duan Ye Wang Dongmi Li College of Chemistry and Chemical Engineering Luoyang Normal UniversityLuoyangHenan 471022China

A facile synthesis of benzofuro[2,3-c]pyridines has been achieved under mild conditions by using ammonium acetate as the nitrogen source through intramolecular cascade *** reaction could efficiently construct pyridine... 详细信息

关键词： benzofuro[2 3-c]pyridines intramolecular cascade annulation ammonium acetate

A concept analysis of cultural competence

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International Journal of Nursing Sciences 2016年第3期3卷 268-273页

作者： duan-ying Cai School of Nursing Nantong UniversityNantong 226001China

Objectives:To clarify the meaning and reduce ambiguities of the concept cultural competence,and promote consistency in using the concept in nursing dialog,research,and ***:Using Walker and Avant's method of concept ***:Cultural competence is the gradually developed capacity of nurses to provide safe and quality healthcare to clients of different cultural *** defining attributes are cultural awareness,cultural sensitivity,cultural knowledge,cultural skill,and dynamic *** are cultural diversity,cultural encounter,and cultural *** involve three beneficiaries,as follows:clients,nurses,and healthcare *** referents are primarily consisted in self-reported ***:The understanding of cultural competence of nurses that emerged in this concept analysis will contribute to the development of a rigorous design of instruments or research.

关键词： Concept analysis Cultural competence Nurses Nursing

Robust guaranteed cost filtering for uncertain timedelay systems with Markovian jumping parameters

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Journal of Systems Engineering and Electronics 2005年第4期16卷 852-857页

作者： Fu Yanming Zhang ying duan Guangren Chai Qingxuan Center for Control Theory and Guidance Technology Harbin Inst. of Technology Harbin 150001 P. R. China

The robust guaranteed cost filtering problem for a dass of linear uncertain stochastic systems with time delays is investigated. The system under study involves time delays, jumping parameters and Brownian motions. The transition of the jumping parameters in systems is governed by a finite-state Markov process. The objective is to design linear memoryless filters such that for all uncertainties, the resulting augmented system is robust stochastically stable independent of delays and satisfies the proposed guaranteed cost performance. Based on stability theory in stochastic differential equations, a sufficient condition on the existence of robust guaranteed cost filters is derived. Robust guaranteed cost filters are designed in terms of linear matrix inequalities. A convex optimization problem with LMI constraints is formulated to design the suboptimal guaranteed cost filters.

关键词： stochastic systems Markovian jumping parameters guaranteed oost filtering linear matrix inequalities,time-delay systems.

A Methodology for Reliability of WSN Based on Software Defined Network in Adaptive Industrial Environment

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IEEE/CAA Journal of Automatica Sinica 2018年第1期5卷 74-82页

作者： ying duan Wenfeng Li Xiuwen Fu Yun Luo Lin Yang School of Logistics Engineering Wuhan Universityof Technology Wuhan 430063 China Department of Computer Science and Application Zhengzhou University of AeronauticsZhengzhou 450015 China School of Logistics Engineering Wuhan University of Technology Wuhan 430063 China Institute of Logistics Science and Engineering Shanghai Maritime University Shanghai 201306 China IEEE

As communication technology and smart manufacturing have developed, the industrial internet of things(IIo T)has gained considerable attention from academia and *** sensor networks(WSNs) have many advantages with broad applications in many areas including environmental monitoring, which makes it a very important part of IIo T. However,energy depletion and hardware malfunctions can lead to node failures in WSNs. The industrial environment can also impact the wireless channel transmission, leading to network reliability problems, even with tightly coupled control and data planes in traditional networks, which obviously also enhances network management cost and complexity. In this paper, we introduce a new software defined network(SDN), and modify this network to propose a framework called the improved software defined wireless sensor network(improved SD-WSN). This proposed framework can address the following issues. 1) For a large scale heterogeneous network, it solves the problem of network management and smooth merging of a WSN into IIo T. 2) The network coverage problem is solved which improves the network reliability. 3) The framework addresses node failure due to various problems, particularly related to energy ***, it is necessary to improve the reliability of wireless sensor networks, by developing certain schemes to reduce energy consumption and the delay time of network nodes under IIo T conditions. Experiments have shown that the improved approach significantly reduces the energy consumption of nodes and the delay time, thus improving the reliability of WSN.

关键词： Industrial internet of things(IIo T) reliability software defined network(SDN) wireless sensor network(WSN)

Calculating detonation performance of explosives by VLWR thermodynamics code introduced with universal VINET equation of state

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Defence Technology（防务技术） 2022年第6期18卷 1041-1051页

作者： Qin Liu ying-liang duan Wei Cao Hong-hao Ma Xin-ping Long Yong Han Institute of Chemical Materials China Academy of Engineering PhysicsYouxian Ditrict621000Mianyang CitySichuan ProvinceChina CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsSchool of Engineering ScienceUniversity ofScience and Technology of ChinaHefeiAnhui230026PR China China Academy of Engineering Physics Youxian Distnict621000Mianyang CitySichuan ProvinceChina Key Laboratory of Fire Science University of Science and Technology of ChinaHefeiAnhui230026PR China

Thermodynamic calculation is the theoretical basis for the study of initiation and detonation,as well as the prerequisite for forecasting the detonation performance of unknown *** on the VLWR(Virial-Wu)thermodynamic code,this paper introduced the universal solid equation of state(EOS)*** order to truly reflect the compressibility of nanocarbon under the extremely high-temperature and high-pressure environment in detonation,an SVM(support vector machine)was utilized to optimize the input parameters of *** detonation performance of several explosives with different densities was calculated by the optimized universal EOS,and the results show that the thermodynamic code coupled with the universal solid EOS VINET can predict the detonation performance parameters of explosives *** investigate the application of the thermodynamic code with the improved VINET EOS in the working capacity of explosives,the interrelationship between pressure P-particle velocity u and pressure P-volume V were computed for the detonation products of TNT and HMX-based PBX(HMX:binder:insensitive agent=95:4.3:0.7)in the CJ isentropic state.A universal curve proposed by Cooper was used to compared the computed isentropic state,where the ratio of pressure to CJ state were plotted against the ratio of velocity to CJ *** parameters of the JWL(Jones-Wilkins-Lee)EOS for detonation products were obtained by fitting the P-V *** cylinder tests of TNT and HMX-based PBX were numerically simulated using the LS-DYNA,it is verified that,within a certain range,the improved algorithm has superiority in describing the working capacity of explosives.

关键词： Detonation performance Thermodynamic calculation VINET equation of state VLWR thermodynamics Code Support vector machine Cylinder test

Mechanisms of Enhanced Rice Growth and Nitrogen Uptake by Nitrate

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Pedosphere 2007年第6期17卷 697-705页

作者： duan ying-Hua YIN Xiao-Ming ZHANG Ya-Li SHEN Qi-Rong College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 （China）

Rice is being increasingly cultivated in intermittently irrigated regions and also in aerobic soil in which Nitrate （NO3^- ） plays important role in nutrition of plant. However, there is no information regarding the influence of nitrate on the overall growth and uptake of nitrogen （N） in rice plant. Solution culture experiments were carried out to study the effects of NO^3- on the plant growth, uptake of N, and uptake kinetics of NH4^＋ in four typical rice （Oryza sativa L.） cultivars （conventional indica, conventional japonica, hybrid indica, and hybrid japonica）, and on plasma membrane potential in roots of two conventional rice cultivars （indica and japonica） at the seedling stage. The results obtained indicated that a ratio of 50/50 NH4^＋-N/NO3^--N increased the average biomass of rice shoots and roots by 20% when compared with that of 100/0 NH4^＋-N/NO3^--N. In case of the 50/50 ratio, as compared with the 100/0 ratio, total N accumulated in shoots and roots of rice increased on an average by 42% and 57%, respectively. Conventional indica responds to NO3^- more than any other cultivars that were tested. The NO^3- supply increased the maximum uptake rate （Vmax） of NH4^＋ by rice but did not show any effect on the apparent Michaelis-Menten constant （Km） value, with the average value of Vmax for NH4^＋ among the four cultivars being increased by 31.5% in comparison with those in the absence of NO3^-. This suggested that NO3^- significantly increased the numbers of the ammonium transporters. However, the lack of effect on the Km value also suggested that the presence of NO3^- had no effect on the affinity of the transporters for NH4^＋. The plasma membrane potential in the roots of conventional indica and japonica were greatly increased by the addition of NO3^- , suggesting that NO3^- could improve the uptake of N by roots of the rice plant. In conclusion, the mechanisms by which NO3^- enhances the growth and N uptake of rice plant was found by the increased value of Vm

关键词： ammonium uptake nitrate nutrition nitrogen uptake plasma membrane potential rice

Nitrate Effect on Rice Growth and Nitrogen Absorption and Assimilation at Different Growth Stages

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Pedosphere 2006年第6期16卷 707-717页

作者： duan ying-Hua ZHANG Ya-Li SHEN Qi-Rong WANG Song-Wei College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 China

The effect of nitrate （NO3^-） on rice （Oryza sativa L.） growth as well as N absorption and assimilation during different growth stages was examined using three typical rice cultivars. Dry weight, yield, N uptake, nitrate reductase activity （NRA） in leaves, and glutamine synthetase activity （GSA） in roots and leaves during their entire growth periods, as well as the kinetic parameters of ammonium （NH4^＋） uptake at the seedling stage, were measured with solution culture experiments. Results indicated that addition of NH4^＋-N and NO3^-N at a ratio of 75：25 （NH4^＋＋NO3^- treatment） when compared with that of NH4^＋-N alone （NH4^＋ treatment） increased the dry weight of ‘Nanguang＇ cultivar by 30% and ‘Yunjing 38＇ cultivar by 31%, and also increased their grain yield by 21% and 17%, respectively. For the four growth stages, the total N accumulation in plants increased by an average of 36% for ‘Nanguang＇ and 31% for ‘Yunjing 38＇, whereas the increasing effect of NO3^- in the ‘4007＇ cultivar was only found at the seedling stage, in the NH4^＋＋NO3^- treatment compared to the NH4^＋ treatment, NRA in the leaves increased by 2.09 folds, and GSA increased by 92% in the roots and 52% in the leaves of the three cultivars. NO3^- supply increased the maximum uptake rate （Vmax） in the ‘Nanguang＇ and ‘Yunjing 38＇ cultivars, reflecting that the NO3^- itself, not the increasing N concentration, increased the uptake rate of NH4^＋ by rice. There was no effect on the apparent Michaelis-Menten constant （Kin） of the three cultivars. Thus, some replacement of NH4^＋ with NO3^-could greatly improve the growth of rice plants, mainly on account of the increased uptake of NH4^＋ promoted by NO3^-, and future studies should focus on the molecular mechanism of the increased uptake of NH4^＋ by NO3^-.

关键词： growth stages N absorption and assimilation nitrate N uptake rice

Kinetic freeze-out temperatures in central and peripheral collisions:which one is larger?

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Nuclear Science and Techniques 2018年第6期29卷 45-66页

作者： Hai-Ling Lao Fu-Hu Liu Bao-Chun Li Mai-ying duan Institute of Theoretical Physics and State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi University

The kinetic freeze-out temperatures, T_0, in nucleus–nucleus collisions at the Relativistic Heavy Ion Collider(RHIC) and Large Hadron Collider(LHC) energies are extracted by four methods:(1) the Blast-Wave model with Boltzmann–Gibbs statistics(the BGBW model),(2) the Blast-Wave model with Tsallis statistics(the TBW model),(3) the Tsallis distribution with flow effect(the improved Tsallis distribution), and(4) the intercept in T=T_0+ am_0(the alternative method), where m_0 denotes the rest mass and T denotes the effective temperature which can be obtained by different distribution functions. It is found that the relative sizes of T_0 in central and peripheral collisions obtained by the conventional BGBW model which uses a zero or nearly zero transverse flow velocity, β_T, are contradictory in tendency with other methods. With a re-examination for β_Tin the first method,in which β_Tis taken to be ～ (0:40 ± 0:07)c, a recalculation presents a consistent result with others. Finally, our results show that the kinetic freeze-out temperature in central collisions is larger than that in peripheral collisions.

关键词：原子核碰撞中央温度结冰运动流动速度模型重离子

Clinical features, surgical outcomes and genetic analysis of ectodermal dysplasia with ocular diseases

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International Journal of Ophthalmology(English edition) 2022年第7期15卷 1062-1070页

作者： Xi Chen Wei-Xuan Zeng Bao-ying duan Yan-Yan Lin Jia Liu Zong-duan Zhang Eye Hospital and School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina Aier Eye Hospital Kunming 650000Yunnan ProvinceChina

AIM: To report on the clinical features, surgical outcomes and gene mutation analysis of three ectodermal dysplasia probands with ocular diseases. METHODS: A case-note review of three unrelated probands diagnosing with ectodermal dysplasia with ocular diseases was undertaken. Patient clinical features and the outcomes of surgery were analysed. The suspected pathogenic genes were analysed by whole exome sequencing from patients with ectodermal dysplasia and Sanger sequencing from family ***: The ocular clinical features of ectodermal dysplasia with ocular diseases mainly include eyelid ectropion, lagophthalmos and absence of lacrimal punctum. All the probands underwent surgeries of full-thickness free skin flap grafting to correct ectropion. They achieved good recovery, and there were no obvious complications during the follow-up. The gene sequencing results did not show any meaningful genetic ***: Lid ectropion is one of the key clinical traits of ectodermal dysplasia with ocular diseases. Ectropion correction with full-thickness free skin flap grafting is an effective procedure to correct ectropion for ectodermal dysplasia patients with ichthyosis-like tissue. The suspected pathogenic genes of ectodermal dysplasia with ectropion should be further verified or confirmed by large samples of the family.

关键词： ectodermal dysplasia ectropion full-thickness skin graft whole-exome sequencing