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In view of the multi-UAV cooperative area coverage search problem, the analysis and simplification are carried out. A number of improvement measures are proposed on the basis of the classic genetic algorithm to improve the adaptability of the algorithm and adapt to the engineering application. The “zero-adding method” and the “negative number method” are mainly proposed. These two encoding methods are used to simulate and verify the optimization solution of a typical scene. The simulation results prove that both methods achieve the balance of search optimization accuracy and speed. Among them, the effect of the “negative number method” is slightly better than the “zero-filling method”.

The intelligent combat of aircraft has become an important research area. This paper studies the 1Vs1 pursuit-evasion game confrontation scenario of the aircraft, aiming to enable the red agent to find the optimal strategy to avoid the blue interception. First, the aircraft is abstracted into an agent, the kinematics model of the aircraft is simplified, and the behavior model of the aircraft with the bait throwing behavior is established. Based on the improved DQN algorithm, with relative distance, line-of-sight angle and azimuth as the state; the reward function design comprehensively considers the time, number of bait throwing, maneuvering time, and miss distance, and proposes an aircraft pursuit-evasion game algorithm (RB-DQN) in a three-dimensional environment. Experimental results show that the algorithm can effectively control the aircraft to complete the escape mission, and has satisfactory generalization.

When acquiring a spoken language, speakers adapt their speech organs to the articulatory manners and places and thus form a specific articulatory space. For second language (L2) learning, the acquisition process is essentially the one for the learners to approach the standard speech of native speakers in articulatory and acoustical domains by overcoming interferences from their first language. Based on this view, this study investigates learning trajectories in L2 acquisition by measuring the changes in the distance between vowel structures observed from L2 learners and the natives. The vowel structures were constructed for six Mandarin vowels from about 7,200 tokens using the Laplacian eigenmaps. Each vowel was described by a vector with the phase and amplitude of its cluster center and its standard deviation in the vowel structure, and the distance was defined by the difference of the vectors between the learners and the natives. 30 Tibetan Mandarin learners with three Mandarin proficiency levels and 10 Mandarin native speakers participated in this study. The results showed that: i) the higher the Mandarin proficiency of Tibetan speakers is, the closer the structure of their Mandarin vowels is to that of the natives, and ii) the learning trajectory of the six Mandarin vowels, except for vowel /o/, shows a monotonic tendency, that is, as the Tibetan speakers' Mandarin proficiency level increases, the distance reduces for each vowel.

In the paper, we first put forward an uncertain transportation model for transhipment permitted when the pessimistic value criterion is true. Secondly, balanced condition of an uncertain transportation model is presented. Lastly, we conduct the numerical experiments.

In the paper, we first put forward an uncertain transportation model for transhipment not permitted when the pessimistic value criterion is true. Secondly, balanced condition of an uncertain transportation model is presented. Thirdly, we conduct the numerical experiments. Lastly, we analyze the changes of the total cost, the total number of shipping products and the average cost of shipping one unit product with the change of the confidence level, respectively.

On the basis of the current situation of streaming media application, this article analyses the limitations of traditional streaming video service platform. Seeing that present defect oft application of traditional streaming media. On the one hand, it introduces IPV6 network into Public Video Service Platform, which guarantees the reliable transmission of streaming media. On the other hand, this paper sets out from the construction status of public video service platform, aiming to create a logical clearness and complete functions public video service platform with leisure, entertainment and study in one body on the Internet, which will provide video on demand services for online users free of charge.

In the paper, we put forward the linear weighting method for solving a type of non-differentiable multiobjective programming problem, and use it to solve an example.

To provide valuable references for the greening plant species selection, planting design and location in city the present study was undertaken. Leaf dust capturing capacities of 14 common urban greening plants and their relationships with surface micromorphology has been investigated. Among the selected plant species, leaf dust capturing capacities ranged from 0.23 g/m2 (Trifolium repens) to 4.51 g/m2 (Pittosporum tobira), and dust accumulation of plant leaves might be reach maximum values in five days after rainfall. The particles mainly deposited on adaxial surfaces, only very few deposited in the stomatal regions on abaxial surfaces. Six plant species (Pittosporum tobira, Pinus tabulaeformis, Ligustrum lucidum, Viburnum odoratissimum, Cedrus deodara and Platanus acerifolia) showed higher dust capturing capacities (3.87∼4.51 g/m2), which surface structures of their foliage were benefit for capturing particles. The lower dust capturing capacity of Trifolium repens may relate to wax tubules covered on leaf surface which creates self-cleaning properties. From the findings it can be concluded that plants with higher dust capturing capacities and these leaf micromorphological properties such as epidermal cell, wax and sunken stomas can be recommended for introducing as urban greening plant species.

The Soil water availability (SWA) reflects the degree of difficulty that plant absorbs and utilizes soil moisture. However, these SWA indexes including static criterions and dynamic indexes are inconsistent and difficult to use practically. In this paper, we thought SWA actually reflected consumption energy value of uptake water by plant, and the consumption energy value could be determined a definite integral from permanent wilting point to field capacity about soil water retention curve. The energy integral of soil water retention curve per soil volume water content change is used and tested on different soil types in the Loess Plateau of China. The results indicated that the method provides clearly theory-based water-uptake energy consumption by plants, and achieved the same results as those by productivity index and root water-uptake rate.

Information Management System realization including establishment and maintenance of the database and front-end application development. This paper describes the system functional and architecture design, and emphasizes the system's functionality, database design and functional modules, etc. Fully functional, flexible and convenient application and friendly interface provide a good guarantee for student information management.

This thesis introduced the idea and techniques of web2.0, studied the application of the idea and techniques of web2.0 in Personal Knowledge Management System, finally designed a Web-2.0 Based Personal Knowledge Management System to make the personal knowledge management system plays its maximum effectiveness under the platform of web2.0, to enhance personal core competitiveness, also to achieve the comprehensive development of the individuals in the era of knowledge economy.

This thesis introduces the basic function of web 2.0-based teaching management system and proposes the entire structure design of the system combined with the current situation of teaching management system. The thesis emphatically elaborated the functional module design of this system. The whole system have consummate function, it is very convenient and flexible for application , the contact surface is friendly, all of which provide perfect guarantee for the teaching management. Based on all of these, it foresees its application perspective providing a new way for the teaching management system in the Web 2.0 era.

The thesis took the fine courses in colleges and universities as the starting point, proposed the architecture and functional module design of Web2.0-based learning Support Service System based on analysis of the characteristics of Web2.0 and concept of learning support services system, explored the achievement process of partial functional modules, provided a new paradigm for the e-learning of Web2.0 era.

E-learning behavior analysis is an important issue to the instruction based on Internet. This paper proposed a new method to analyze the E-learning behavior.It classified E-learning behaviors into several clusters by fuzzy clustering algorithm. Behaviors in the same cluster have the most common in characters, while behaviors between clusters have the least common. Experiments fully demonstrated that the proposed method can achieve good performance of analyzing E-learning behavior. It shows that by using cluster analysis, teachers can understand the students better in interest, personality and other informations. It also helps to develop effective educational resource and carry out the personalized instruction.

In this study, the aged refuse excavated from a 10-year old closed landfill compartment at Shanghai Laogang Refuse Landfill was used as the substrate in a sequencing aged refuse bioreactor process for treatment of fresh landfill leachate which sampled from the balance tank in the same landfill. Typically, screened aged refuse with a diameter less than 8 mm was used as bio-filtration material in the two round shaped bioreactor with an inner diameter of 40 cm and a height of 130 cm. Influent fresh leachate with initial CODCr, TN and NH3-N concentrations of 11000?15000, 1340?1770 and 11200?1650 mg/L, respectively, was introduced into the system. The corresponding concentrations in the effluent were reduced to below 300, about 250, and below 15mg/L, respectively. The sequencing aged refuse process is effective in the fresh leachate treatment, the removal efficiency of COD and TN removal is about 90% and 80% respectively, and the ammonia nitrogen transformation efficiency is about 99.5%. The treatment mechanism of nitrogen removal was studied. In the process, the nitrogen removal is mainly due to the simultaneous nitrification and denitrification in both bioreactors. Recirculated nitrate nitrogen denitrification exists in bioreactor 1, but is not the main nitrogen removal pathway, which is different from the nitrogen removal mechanism in aged leachate treatment.

SOA is a software architecture. It is a real solution to integrate education resources and enhance resource utilizes. This essay introduced SOA's principle, structure and reference model of application. Based on this, it designed a SOA-based education resource service system. It used Web Service, WSDL, UDDI, SOAP and CELTS to implement the system. Through the system, we can use and develop the education resource much more easier and quicker.

It is a fascinating yet challenging problem to accurately and efficiently localize regionally distinct features between face groups in multi-dimensional signal processing and analysis. Given a data with unknown distribution and small sample size, we propose a new statistical analysis framework using hybrid randomization (i.e., permutation) tests to improve the system's efficiency in identifying distinct features. The proposed method fits the nonparametric distribution of the test statistic with Pearson distribution series. We bypass the tedious online randomization via calculating the first four moments of the permutation distribution. This can reduce the computational complexity from O(n!) to O(n2) over traditional methods for the modified Hotelling's T2 test statistics. Experiments on simulated data and 3D face analysis demonstrate the efficiency, accuracy and robustness of the proposed approach.