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Effects of polyamines on the early development of cystocarps,spore release,survival,and germination rate of Gracilariopsis lemaneiformis

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Journal of Oceanology and Limnology 2023年第3期41卷 1133-1144页

作者： Deguang sun Emon RAHMAN Siqi sun xue sun Nianjun XU Key Laboratory of Marine Biotechnology of Zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China

Three polyamines(PAs)(spermidine(Spd),spermine(Spm),and putrescine(Put))were used as growth regulators to the marine macroalgae Gracilariopsis lemaneiformis and to female gametophyte and reproductive tissues(cystocarps were constructed),which led to early maturation of cystocarps and spore *** cultivation revealed that exogenous PA application accelerated the development of cystocarps,and the mean sporeling growth rate was 20%–50%/d during the initial week of *** spore count(SC),survival rate(SR),and germination rate(GR)of *** showed different responses to PA(10-6 mol/L and 10-3 mol/L)treatments under different temperatures(18,26,and 34℃),light intensities(30,60,and 90μmol photons/(m^(2)·s)),salinities(25,30,and 35),and nutrient levels(25꞉2.5,50꞉5.0,and 75꞉7.5μmol/L NH4Cl꞉K2HPO4),and the optimal conditions were 26℃,light intensity of 60μmol/(m^(2)·s),salinity of 35,and nutrient level of 50꞉5.0μmol/L NH4Cl꞉*** the optimum conditions,the SC per cystocarp increased by 82.38%,and the spore SR and GR increased by 33.07%and 46.44%,*** experiment lasted for 7 days,with the highest SC on Day 4 and plateauing on Day *** results indicate that PAs could promote the early maturation,spore release,survival,and germination of *** under laboratory conditions.

关键词： Gracilariopsis lemaneiformis polyamines carpospores spore release survival rate germination rate

Gaussian fitting based optimal design of aircraft mission success space using multi-objective genetic algorithm

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Chinese Journal of Aeronautics 2020年第12期33卷 3318-3330页

作者： Yuan GAO Yongliang TIAN Hu LIU xue sun School of Aeronautic Science and Engineering Beihang UniversityBeijing 100083China

In order to obtain the optimized aircraft design concept which meets the increasingly complex operation environment at the conceptual design stage,System-of-systems(So S)engineering must be *** paper proposes a novel optimization method for the design of aircraft Mission Success Space(MSS)based on Gaussian fitting and Genetic Algorithm(GA)in the So S ***,the concepts in the design and evaluation of MSS are summarized to introduce the Contribution to System-of-Systems(CSS)by using a conventional effectiveness index,Mission Success Rate(MSR).Then,the mathematic modelling of Gaussian fitting technique is noted as the basis of the optimization *** that,the proposed optimal MSS design is illustrated by the multiobjective optimization process where GA acts as the search tool to find the best solution(via Pareto front).In the case study,a simulation system of penetration mission was *** simulation results are collected and then processed by two MSS design schemes(contour and neural network)giving the initial variable space to GA *** on that,the proposed optimization method is implemented under both schemes whose optimal solutions are compared to obtain the final best design in the case study.

关键词： Evaluation Gaussian fitting Genetic algorithm Mission success space Neural network System-of-systems

Lie Subalgebras in a Certain Operator Lie Algebra with Involution

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Acta Mathematica Sinica,English Series 2011年第8期27卷 1521-1534页

作者： Shan Li sun xue Feng MA P. R. China

We show in a certain Lie-algebra, the connections between the Lie subalgebra G＋：= G-t-G＊ 4- [G, G＊], generated by a Lie subalgebra G, and the properties of G. This allows us to investigate some useful information about the structure of such two Lie subalgehras. Some results on the relations between the two Lie subalgebras are obtained. As an application, we get the following conclusion： Let ,4 C /3（2d） be a space of self-adjoint operators and L：：= A ~ i^4 the corresponding complex Lie＊-algebra. G＋ = G 4- G＊ 4- [G, G＊] and G are two LM-decomposable Lie subalgebras of L： with the decomposition 6＋ = 7^（6＋） 4- S, G -- T~~ 4- 86, and T^6 C T^（6＋）. Then 6＋ is ideally finite iff T~ ：= 7~6 4- ~ 4- [T^6,7~] is a quasisolvable Lie subalgebra, S^- ：= 86 4- S~ 4- [$6, $~] is an ideally finite semisimple Lie subalgebra, and [7~6,86] = [R.~, 86] = {0}.

关键词： Skew operator generalized scalar operator E-solvable Lie algebra ideally finite

The axisymmetric long-wave interfacial stability of core-annular flow of power-law fluid with surfactant

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Acta Mechanica Sinica 2012年第1期28卷 24-33页

作者： xue-Wei sun Jie Peng Ke-Qin Zhu Department of Engineering Mechanics Tsinghua University100084 BeijingChina

The long wave stability of core-annular flow of power-law fluids with an axial pressure gradient is investigated at low Reynolds number. The interface between the two fluids is populated with an insoluble surfactant. The analytic solution for the growth rate of perturbation is obtained with long wave approximation. We are mainly concerned with the effects of shear-thinning/thickening property and interfacial surfactant on the flow stability. The results show that the influence of shear-thinning/thickening property accounts to the change of the capillary number. For a clean interface, the shear-thinning property enhances the capillary instability when the interface is close to the pipe wall. The converse is true when the interface is close to the pipe centerline. For shear-thickening fluids, the situation is reversed. When the interface is close to the pipe centerline, the capillary instability can be restrained due to the influence of surfactant. A parameter set can be found under which the flow is linearly stable.

关键词： Core-annular flow. Power-law fluid. Interfacial surfactant Long-wave stability

Training effectiveness evaluation of helicopter emergency relief based on virtual simulation

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Chinese Journal of Aeronautics 2018年第10期31卷 2000-2012页

作者： xue sun Hu LIU Guanghui WU Yaoming ZHOU School of Aeronautic Science and Engineering Beihang UniversityBeijing 100083China Key Laboratory of Aircraft Advanced Design Technology Ministry of Industry and Information TechnologyBeijing 100083China State Key Laboratory of Virtual Reality Technology and Systems Beijing 100083China Commercial Aircraft Corporation of China Ltd.Shanghai 200126China

Helicopters are playing an increasingly important part in emergency relief, such as earthquake rescue, firefighting and medical transport. With the development of virtual simulation technology, virtual simulation-based training is widely used in the training of the helicopter crew especially for the dangerous and costly missions mentioned above. A complete training effectiveness evaluation method is proposed to evaluate the trainees＇ training effect based on virtual simulation in this paper. A key to this method is regarding the complicated process as a discrete event-activity flow system and establishing the evaluation indicator system. Then expert group and Analytical Network Process（ANP） are applied to determine the weight of indicators. When the training data are processed, there is a novel attempt to apply Fuzzy Comprehensive Evaluation（FCE） model to calculate the two categories of indicators. Eventually, an experiment and the analysis were carried out to validate the evaluation method.

关键词： Analytical network process Emergency relief Fuzzy comprehensive evaluation Helicopter Training effectiveness evaluation Virtual simulation

Incentive regulation of banks on third party logistics enterprises in principal-agent-based inventory financing

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Advances in Manufacturing 2014年第2期2卷 150-157页

作者： xue-Hua sun xue-Jian Chu Zhong-Dai Wu Shanghai Key Laboratory of Mechanical Automation and Robotics Shanghai University Modern Logistics Research Center Shanghai University China Shipping Information System Co. Ltd

In inventory financing,asymmetric information between banks and the third party logistics enterprises may incur moral risks,often causing economic losses of *** effectively solve this problem,a pure incentive scheme and a regulatory incentive scheme are designed with the principal-agent *** comparison,it is found that the pure incentive model is not applicable to practical conditions,and regulatory incentive model can not only solve practical problems substantially but also outbalance pure incentive model under certain *** research results from example analysis given in this paper offer theoretical instruction and a practical method for effective regulation of banks.

关键词： Inventory financing Asymmetric information Principal-agent Regulatory incentive

MTCR-CR Routing Strategy for Connection-Oriented Routing over Satellite Networks

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China Communications 2024年第5期21卷 280-296页

作者： Li Changhao sun xue Yan Lei Cao Suzhi The University of Chinese Academy of Sciences Beijing 100094China Key Laboratory of Space Utilization Chinese Academy of SciencesBeijing 100094China Technology and Engineering Center for Space Utilization Chinese Academy of SciencesBeijing 100094China

The high-speed movement of satellites makes it not feasible to directly apply the mature routing scheme on the ground to the satellite ***-DVTR in the snapshot-based connectionoriented routing strategy is one of the representative solutions,but it still has room for improvement in terms of routing *** this paper,we propose an improved scheme for connection-oriented routing strategy named the Minimal Topology Change Routing based on Collaborative Rules(MTCR-CR).The MTCR-CR uses continuous time static topology snapshots based on satellite status to search for intersatellite link(ISL)construction solutions that meet the minimum number of topology changes to avoid route *** simulation results in Beidou-3 show that compared with DT-DVTR,MTCR-CR reduces the number of routing changes by about 92%,the number of path changes caused by routing changes is about38%,and the rerouting time is reduced by approximately 47%.At the same time,in order to show our algorithm more comprehensively,the same experimental index test was also carried out on the Globalstar satellite constellation.

关键词： ISL routing stability satellite networks satellite routing dynamic strategy

Removal of gaseous volatile organic compounds via vacuum ultraviolet photodegradation: Review and prospect

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Journal of Environmental Sciences 2023年第3期125卷 427-442页

作者： xue sun Chaolin Li Boping Yu Jingwen Wang Wenhui Wang School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China Shenzhen Academy of Environmental Sciences Shenzhen 518001China

Volatile organic compounds(VOCs) have attracted much attention for decades as they are the precursors of photochemical smog and are harmful to the environment and human health. Vacuum ultraviolet(VUV) photodegradation is a simple and effective method to decompose VOCs (ranging from tens to hundreds of ppmV) without additional oxidants or catalysts in the air at atmospheric pressure. In this paper, we review the research progress of VOCs removal via VUV photodegradation. The fundamentals are outlined and the key operation factors for VOCs degradation, such as humidity, oxygen content, VOCs initial concentration, light intensity, and flow rate, are discussed. VUV photodegradation of VOCs mixture is elucidated. The application of VUV photodegradation in combination with ozoneassisted catalytic oxidation(OZCO) and photocatalytic oxidation(PCO) systems, and as the pre-treatment technique for biological purification are illustrated. Based on the summary,we propose the challenges of VUV photodegradation and perspectives for its future development.

关键词： Vacuum ultraviolet(VUV) photodegradation Gaseous volatile organic compounds(VOCs) O_(3)elimination

Team effectiveness evaluation and virtual reality scenario mapping model for helicopter emergency rescue

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Chinese Journal of Aeronautics 2020年第12期33卷 3306-3317页

作者： xue sun Hu LIU Yongliang TIAN Guanghui WU Yuan GAO School of Aeronautic Science and Engineering Beihang UniversityBeijing 100083China Key Laboratory of Aircraft Advanced Design Technology Ministry of Industry and Information TechnologyBeijing 100083China State Key Laboratory of Virtual Reality Technology and Systems Beijing 100083China Commercial Aircraft Corporation of China Ltd.Shanghai 200126China

The application of helicopter emergency rescue is becoming increasingly widespread,but the flight crew training in this area is still difficult due to high cost and ***,with the development of Virtual Reality(VR)technology,virtual simulation has become a significant role in crew training of helicopter *** the implementation of VR-based training,how to transform complex real tasks into VR scenarios and how to evaluate the performance of crew are of great *** address these issues,a novel VR-based R-E-A-D(Report,Evaluate,Agree,Do)evaluation model for training is proposed,which is suitable for complex missions with multiple tasks,multiple scenarios,and multiple ***,a mapping method of VR scenarios is put forward,which can transform the real tasks into virtual scenarios to serve the virtual simulation ***,an experiment is carried out to verify the feasibility of the evaluation method and virtual scenario mapping method.

关键词： Helicopter emergency rescue Scenario mapping model Team effectiveness evaluation Virtual reality(VR) Virtual simulation-based training