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Lv F.,Key Laboratory of Bionic Engineering | Lv F.,Jilin University | Lv F.,Henan University of Science and Technology | Yang Y.,Key Laboratory of Bionic Engineering | Yang Y.,Jilin University
Revista Tecnica de la Facultad de Ingenieria Universidad del Zulia | Year: 2016

An extension model was proposed for identifying core capabilities of service-oriented manufacturing enterprises. In this model, the extension theory and variable weight theory are integrated according to the basic structure and characteristics of the enterprises' core capabilities. In order to reduce the influence of subjective factors, the entropy weight method was employed to determine the constant weight of the characteristics of core capabilities. The function of punishment variable weights is formulated to feature the coordination of the characteristics, which makes the weight distribution more reasonably. Finally, the proposed model was verified using the grade identification on an agricultural equipment manufacturing enterprise. The results show that this model is well consistent with the actual situation of the enterprise, and can well reflect the real state of the core capability elements.

Wan C.,Jilin University | Tian Y.T.,Jilin University | Tian Y.T.,Key Laboratory of Bionic Engineering
Applied Mechanics and Materials | Year: 2014

Affective computing is an indispensable aspect in harmonious human-computer interaction and artificial intelligence. Making computers have the ability of generating emotions is a challenging task of affective computing. Affective Computing and Artificial Psychology are new research fields that involve computer and emotions, they have the same key research aspect, affective modeling. The paper introduces the basic affective elements, and the representation of affections in a computer. And then this paper will describe an emotion generation model for a multimodal virtual human. The relationship among the emotion, mood and personality are discussed, and the PAD emotion space is used to define the emotion and the mood. We obtain the strength information of each expression component through fuzzy recognition of facial expressions based on Ekman six expression classifications, and take this information as a signal motivating emotion under the intensity-based affective model. Finally, a 3D virtual Human emotional expression system with facial expressions is designed to show the emotion generation outputs. Experimental results demonstrate that the emotion generation intensity-based model works effectively and meets the basic principle of human emotion generation. © (2014) Trans Tech Publications, Switzerland.

Xu Z.J.,Jilin University | Tian Y.T.,Jilin University | Tian Y.T.,Key Laboratory of Bionic Engineering | Yang Z.M.,Jilin University | Li Y.,Jilin University
Applied Mechanics and Materials | Year: 2014

Finger joint angle pattern recognition is significant for the development of an intelligent bionic hand. It makes the intelligent prosthesis understand the user's intension more accurately and complete movements better. Surface electromyography signals have been widely used in intelligent bionics prosthesis research and rehabilitation medicine due to its advantages like high efficiency, convenient collection and non-invasive access. An improved grid-search method using a support vector machine has been proposed for the finger joint angle pattern recognition issue in surface electromyography signals. Pattern recognition for surface electromyography signals of index finger movement and metacarpophalangeal joint angle has been performed. Better classification performance was achieved through screening of feature vector combined with an improved grid-search support vector machine classification algorithm. © (2014) Trans Tech Publications, Switzerland.

Ji W.F.,Huazhong Agricultural University | Tong J.,Key Laboratory of Bionic Engineering | Tong J.,Jilin University | Chen D.H.,Key Laboratory of Bionic Engineering | Chen D.H.,Jilin University
Applied Mechanics and Materials | Year: 2014

Mole rat, a typical soil-burrowing animal, has high working efficiency during digging procedure, its claws are good biomimetic prototypes, and the geometrical structure of its claws and its movement type during digging can provide certain foundation for improving the design of the tillage implement. In this paper, based on the reverse engineering, the original data points of the claw was collected by a 3D laser scanner, then the accurate surface of the claw was created by using special software of reverse engineering on the premise of point-curve-surface method. The reconstructed CAD model was established in Pro/E software, and the model of interaction between the claws of mole rat and soil was obtained. The finite element method (FEM) was utilized to simulate the interaction of the claw against soil. The simulated results showed that the movement type of claw of mole rate during digging could get lower cutting resistance and bigger impact to soil. © (2014) Trans Tech Publications, Switzerland.

Han Z.,Key Laboratory of Bionic Engineering | Han Z.,Jilin University | Niu S.,Key Laboratory of Bionic Engineering | Niu S.,Jilin University | And 6 more authors.
Nanoscale | Year: 2012

The fine optical structures in wing scales of Trogonoptera brookiana, a tropical butterfly exhibiting efficient light trapping effect, were carefully examined and the reflectivity was measured using reflectance spectrometry. The optimized 3D configuration of the coupling structure was determined using SEM and TEM data, and the light trapping mechanism of butterfly scales was studied. It is found that the front and back sides of butterfly wings possess different light trapping structures, but both can significantly increase the optical path and thus result in almost total absorption of all incident light. An optical model was created to check the properties of this light trapping structure. The simulated reflectance spectra are in concordance with the experimental ones. The results reliably confirm that these structures induce efficient light trapping effect. This functional "biomimetic structure" would have a potential value in wide engineering and optical applications. © 2012 The Royal Society of Chemistry.

Huang H.,Key Laboratory of Bionic Engineering | Huang H.,Jilin University | Zhang Y.,Tianjin University of Science and Technology | Ren L.,Key Laboratory of Bionic Engineering | Ren L.,Jilin University
Journal of Bionic Engineering | Year: 2012

In order to improve the particle erosion resistance of engineering surfaces, this paper proposed a bionic sample which is inspired from the skin structure of desert lizard, Laudakin stoliczkana. The bionic sample consists of a hard shell (aluminum) and a soft core (silicone rubber) which form a two-layer composite structure. The sand blast tests indicated that the bionic sample has better particle erosion resistance. In steady erosion period, the weight loss per unit time of the bionic sample is about 10% smaller than the contrast sample. The anti-erosion mechanism of the bionic sample was studied by single particle impact test. The results show that, after the impact, the kinetic energy of the particle is reduced by 56.5% on the bionic sample which is higher than that on the contrast sample (31.2%). That means the bionic sample can partly convert the kinetic energy of the particle into the deformation energy of the silicone rubber layer, thus the erosion is reduced. © 2012 Jilin University.

Zhang Y.,Key Laboratory of Bionic Engineering | Zhang Y.,Jilin University | Huang H.,Key Laboratory of Bionic Engineering | Huang H.,Jilin University | And 3 more authors.
Journal of Bionic Engineering | Year: 2011

The fore leg of mole cricket (Orthoptera: Gryllotalpidae) has developed into claw for digging and excavating. As the result of having a well-suited body and appendages for living underground, mole cricket still needs to manoeuvre on land in some cases with some kinds of gait. In this paper, the three-dimensional kinematics information of mole cricket in terrestrial walking was recorded by using a high speed 3D video recording system. The mode and the gait of the terrestrial walking mole cricket were investigated by analyzing the kinematics parameters, and the kinematics coupling disciplines of each limb and body were discussed. The results show that the locomotion gait of mole cricket in terrestrial walking belongs to a distinctive alternating tripod gait. We also found that the fore legs of a mole cricket are not as effective as that of common hexapod insects, its middle legs and body joints act more effective in walking and turning which compensate the function of fore legs. The terrestrial locomotion of mole cricket is the result of biological coupling of three pairs of legs, the distinctive alternating tripod gait and the trunk locomotion. © 2011 Jilin University.

Sun J.Y.,Key Laboratory of Bionic Engineering | Sun J.Y.,Jilin University | Pan C.X.,Key Laboratory of Bionic Engineering | Pan C.X.,Jilin University | And 5 more authors.
IET Nanobiotechnology | Year: 2010

To establish the quantitative model of the dragonfly wing the reconfiguration and nanoindentation technique were used. The mechanical properties of wings were measured by nanoindentre. Generally, the costa undertake is mainly pressure, and its mechanical properties should be the largest. However, in the nanoindentation test, the largest value of the reduced modulus (Er) and hardness (H) mainly appear in the radius, except the value at 0.7L (L is the wing length). The Er and H of the forewing were larger than that of the hindwing, except the value at 0.7L. The reversing engineering (3-D scanner) and AutoCAD were cooperated to reconfigure the dragonfly wing. Then the material parameters and skeleton transforms to a finite element analysis. The quantitative models were discussed in static range. © 2010 The Institution of Engineering and Technology.

Liang P.,Key Laboratory of Bionic Engineering | Wei J.,Dalian University
Applied Mechanics and Materials | Year: 2012

Using a weighed decomposition of the stiffness matrix and the weighed generalized inverse theory, a reanalysis method is presented for the topological modification of plane structures, and a set of formulae of elementary topology change are obtained. These formulae are explicit one and using them one can reanalyze the modified structures in topological optimal design. Finally an example is given to verify the valid of this method.

Yang X.,Key Laboratory of Bionic Engineering | Zhang Z.,Key Laboratory of Bionic Engineering | Wang J.,Changchun Railway Vehicles Co. | Ren L.,Key Laboratory of Bionic Engineering
Journal of Alloys and Compounds | Year: 2015

The effect of laser alloying on thermal fatigue resistance of gray cast iron was investigated and explicated by nanoindentation test. It was founded that nanohardness of alloying zone was improved pronouncedly by generating a homogeneous microstructure which has upgraded chemical composition and refined grains. The load-displacement curves showed that the resistance to plastic flow of alloying zone was better than that of matrix. The alloying zone rich in Cr and Ni has a promoted capability of inhibiting the initiation and blocking the propagation of thermal cracks. It was demonstrated that the resistances of plastic deformation and oxidation reaction in alloying zones were main reasons for their effect of inhibiting cracking. The alloying zone can also be accepted as enlarged hard "phase" because of their high nanohardness, which contributed to the effect of blocking cracks. © 2014 Elsevier B.V. All rights reserved.

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