Advanced Materials Research Vols. 108-111

Abstract: When evaluating decoy effectiveness by means of BP neural network, training sometimes failed because of local extremum problem. The genetic algorithm neural network model for evaluating camouflage effectiveness of decoy is created for this purpose. Two steps of evaluating by this method is necessary and a series of index is put forward. After initializing weights and executing genetic operation, we finally retrain the network to get the results which show that the method has fast convergence and the model reliable, effective and objective. This paper is meaningful to camouflage theory and application.

Abstract: This work proposes a new fast algorithm finding maximal frequent item sequences from transaction database. Itemset is defined as item sequence (IS) for mining. Two lists called ISL (Item Sequence List) and FISL (Frequent Item Sequence List) are created by scanning database once for dividing n-IS into two categories depending on whether the IS to achieve minimum support number (n is the number of attributes). Sub item sequences (SIS) whose n-superset is in ISL are generated by recursion to make sure that each k-SIS appeared before its (k+1)-superset. As current k-SIS being joined to FISL, its (k-1)-SIS are pruned (k range from 2 to n-1). At last, all SISs whose n-superset is in FISL are pruned from FISL. We compare our new algorithm and FP-Growth by experiment to prove its superiority.

Abstract: In the firing of ceramic ware in a household or hobbyist’s kiln, it is important that the end point of a kiln firing run be determined accurately. Overheating may cause damage to both the kiln and its contents. Under-heating may mean that the ceramic ware has been insufficiently fired. So, temperature controller of a kiln is important to control the kiln's firing, accurate measurement of temperature inside kiln is the first problem that control system must be solved. This paper proposed an engineering solution which apply different temperature sensors at different temperature zone of a kiln, and then compose a wireless temperature sensor network to precisely measure temperature and transfer data in time without more wires on the surface of kiln.

Abstract: A spatial-temporal scheme based on non-uniform subband general parameter filter banks for broadband beamforming of scaled aperture array is proposed in this paper. The scaled aperture array is composed of several uniformly-spaced linear subarrays, each of which processes an octave subband signal respectively. The non-uniform subband signal is implemented by tree-structure general parameter filter banks. Each subarray broadband beamforming is carried out by a kind of tapped-delay-line (TDL) infinite-impulse-response (IIR) filters beamformer, and four subarrays share the same weights. This processing architecture based beamformer splits the broadband signal into several narrower subband ones which are processed in parallel, and subarray is operating with lower sampling rate, which contributes to decreasing the computational load significantly and improving the speed and performances as well. Simulations show that computation complexity and load of this beamformer are much lower relative to the conventional TDL broadband beamfomer.

Abstract: This article has proved tangent-points have a common plane when quadratic surface is tangent to plane passing by the point outside quadratic surface , discussed several properties of quadratic surface tangent to plane.

Abstract: A fuzzy support vector machine kernel regression method of fatigue limit calculating is presented aiming at difficulty of material fatigue limit calculating and disadvantage of the other forecast model. Complicated and strong nonlinear fatigue limit of material is simulated by parameter optimized design and conformation of fuzzy support vector combinative algorithm, fuzzy support vector optimized algorithm has strong ability of nonlinear mapping and functional approach, it avoids availably phenomenon of partial minimum and overfitting, and gains high precision by comparing numerical value of network output with numerical value of experiment.

Abstract: In this paper, the research evolving on chaotic time series forecast is firstly analyzed, and then the grey forecast model of chaotic time series is set up and is applied to chaotic time series forecast to solve the grey forecast problem of chaotic time series.

Abstract: In this paper, peanut leaves’ delayed luminescence characteristic under excitation of alternating electric field was studied. The decay law of Delayed Luminescence Intensity with time and the change of Initial Light Intensity and Attenuation parameters with the frequency, peak voltage and excitation time of alternating electric field were observed. It was found that: Under the three kinds of excitation, the leaves’ Delayed Luminescence all presented the hyperbolic decay law with the time. In the frequency ranging from 4000HZ to 30000HZ，the Initial Light Intensity showed a trend of first increasing and then decreasing, but attenuation parameters showed a trend of first increasing then decreasing, increasing again and reducing again. In the excitation time ranging from 5min to 30min, the Initial Light Intensity and attenuation parameters all showed a trend of first increasing and then decreasing with the frequency increasing; In the peak voltage ranging from 500v to 10000v, the Initial Light Intensity showed a trend of first decreasing and then increasing with the peak voltage increasing, but attenuation parameters showed a trend of first increasing and then decreasing. The reason is mainly due to that the frequency, the peak voltage and excitation time of alternating electric field have an effect on the electrons transition in non-bonding oxygen atom which locates on chlorophyll’s carbonyl.

Abstract: The induction and regulation network of tumor cell apoptosis is built by integrating several seperated pathway of signal transduction and analyzing the properties and process. Three local area regulation centers such as caspase family, Bcl-2 family and Cyt C protein are found and the mechanisms of signal induction and regulation of every center are discussed.

Abstract: Two new types of ASCII format STL file are presented under lossless data compression and lossy implicit data compression respectively. In these new format file, a vertex with three coordinates which has degree n is stored only once rather than n times and three vertexes of a facet are saved by their indexes instead of by their three coordinates (x, y, z). As a result, the storage space of the vertex reduces to about 1/3 of its original space. It is very convenience for the file transmitting of network manufacturing. Moreover, the reading, writing and pretreatment time of data file are shortened greatly because of the decreasing of the file length.