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Search Results: 1 - 10 of 125302 matches for " Kun WANG "
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THE INTERACTION BETWEEN REAL ESTATE AND NATIONAL ECONOMY
Kun WANG
Management Science and Engineering , 2007,
Abstract: Using relevant data to demonstrate the function of the real estate industry in national economic development, and analyzing the interaction between the real estate industry and the national economy. this paper points out the effect of the development of the real estate industry on promoting economic development, optimizing urban industrial structure and promoting employment. Through a number of parameters and variables to illustrate the interaction and impact between the real estate industry and the national economy, on the basis of this premise, this paper also states the corresponding countermeasures for the sustainable development of the real estate industry. Key words: Real estate, National economy, Interaction
Characteristics of the Incised Valley in the Jurassic of the West Junggar Basin and Its Prospect Direction, NW China  [PDF]
Kun Wang
Open Access Library Journal (OALib Journal) , 2015, DOI: 10.4236/oalib.1101745
Abstract: Incised valley is an important kind of depositional system in the Chepaizi area, west Junggar Basin. In this paper, incised valley depositional system and its prospect direction in the area were obtained with the analysis of seismic reflection, depositional and logging characters. The results show that the Chepaizi uplift Jurassic developed four kinds of filling modes including vertical aggradation, side aggradation, disorder and compound mode and three kinds of distribution type including unitary type, multiple branch type and disorder type. The fault-lithological trap can be easily formed in the updip direction of the valley with the seal of thrown side of fault, which is the main trap type in the area. Incised valley system has been confirmed to have well hydrocarbon shows, yet no industrial output was gotten. The LST fan in the underwater zone of the incised valley system in the east and south margin of the Chepaizi uplift is the important prospect direction.
On Invariants of $\text{C}^*$-algebras with the ideal property
Kun Wang
Mathematics , 2015,
Abstract: In this paper, we consider $\text{C}^*$-algebras with the ideal property (the ideal property unifies the simple and real rank zero cases). We define two categories related the invariants of the $\text{C}^*$-algebras with the ideal property. And we showed that these two categories are in fact isomorphic. As a consequence, the Elliott's Invariant and the Stevens' Invariant are isomorphic for $\text{C}^*$-algebras with the ideal property.
Topological Rigidity for FJ by the Infinite Cyclic Group
Kun Wang
Mathematics , 2015,
Abstract: We call a group FJ if it satisfies the $K$- and $L$-theoretic Farrell-Jones conjecture with coefficient in $\mathbb Z$. We show that if $G$ is FJ, then the simple Borel conjecture (in dimensions $\ge 5$) holds for every group of the form $G\rtimes\mathbb Z$. If in addition $Wh(G\times \mathbb Z)=0$, which is true for all known torsion free FJ groups, then the bordism Borel conjecture (in dimensions $n\ge 5$) holds for $G\rtimes\mathbb Z$. We also show that if the $L$-theoretic Farrell-Jones conjecture with coefficient in $\mathbb Z$ holds for a torsion free group $G$, then the Novikov conjecture holds for any repeated semi-direct product $\big(((G\rtimes\mathbb Z)\rtimes\mathbb Z)\cdots\big)\rtimes\mathbb Z$. One of the key ingredients in proving these rigidity results is another main result, which says that if a torsion free group $G$ satisfies the $L$-theoretic Farrell-Jones conjecture with coefficient in $\mathbb Z$, then any semi-direct product $G\rtimes\mathbb Z$ also satisfies the $L$-theoretic Farrell-Jones conjecture with coefficient in $\mathbb Z$. We also obtain an obstruction for the corresponding statement to hold for the $K$-theoretic Farrell-Jone conjecture.
On passage to over-groups of finite indices of the Farrell-Jones conjecture
Kun Wang
Mathematics , 2015,
Abstract: We use the controlled algebra approach to study the problem that whether the Farrell-Jones conjecture is closed under passage to over-groups of finite indices. Our study shows that this problem is closely related to a general problem in algebraic $K$- and $L$-theories. We use induction theory to study this general problem. This requires an extension of the classical induction theorem for $K$- and $L$- theories of finite groups with coefficients in rings to with twisted coefficients in additive categories. This extension is well-known to experts, but a detailed proof does not exist in the literature. We carry out a detailed proof. This extended induction theorem enables us to make some reductions for the general problem, and therefore for the finite index problem of the Farrell-Jones conjecture.
The Light Weight Design of Mowing Vehicle Frame with a Combined Method  [PDF]
Shunming Li, Kun Xu, Jinrui Wang
Modern Mechanical Engineering (MME) , 2018, DOI: 10.4236/mme.2018.83013
Abstract: Lightweight frame is very important to engineering machinery. In this paper, a lightweight design method is proposed for a mechanical mowing truck frame. This method combines topological optimization with topology optimization to design the frame successfully. Based on the finite element simulation, the strength analysis of the two working conditions (bending condition and torsion condition) for the mowing vehicle frame is carried out on the basis of satisfying the requirements of the frame work strength. This paper makes a comparative analysis of the frame after the second optimization using the combined method proposed. The comparison results show that the optimized frame meets the strength requirement, and its quality is 34.3% lower than before. The lightweight effect is obvious.
Mood States Recognition of Rowing Athletes Based on Multi-Physiological Signals Using PSO-SVM  [PDF]
Jing Wang, Pei Lei, Kun Wang, Lijuan Mao, Xinyu Chai
E-Health Telecommunication Systems and Networks (ETSN) , 2014, DOI: 10.4236/etsn.2014.32002
Abstract:

Athletes have various emotions before competition, and mood states have impact on the competi- tion results. Recognition of athletes’ mood states could help athletes to have better adjustment before competition, which is significant to competition achievements. In this paper, physiological signals of female rowing athletes in pre- and post-competition were collected. Based on the multi-physiological signals related to pre- and post-competition, such as heart rate and respiration rate, features were extracted which had been subtracted the emotion baseline. Then the particle swarm optimization (PSO) was adopted to optimize the feature selection from the feature set, and combined with the least squares support vector machine (LS-SVM) classifier. Positive mood states and negative mood states were classified by the LS-SVM with PSO feature optimization. The results showed that the classification accuracy by the LS-SVM algorithm combined with PSO and baseline subtraction was better than the condition without baseline subtraction. The combination can contribute to good classification of mood states of rowing athletes, and would be informative to psychological adjustment of athletes.

A Fast Input Method for Tibetan Based on Word in Unicode
Weilan Wang,Lingwang Kun
Lecture Notes in Engineering and Computer Science , 2008,
Abstract:
Positive solutions for a system of higher order boundary-value problems involving all derivatives of odd orders
Kun Wang,Zhilin Yang
Electronic Journal of Differential Equations , 2012,
Abstract: In this article we study the existence of positive solutions for the system of higher order boundary-value problems involving all derivatives of odd orders $$displaylines{ (-1)^mw^{(2m)} =f(t, w, w',-w''',dots, (-1)^{m-1}w^{(2m-1)}, z, z',-z''',dots, (-1)^{n-1}z^{(2n-1)}), cr (-1)^nz^{(2n)} =g(t, w, w',-w''',dots, (-1)^{m-1}w^{(2m-1)}, z, z',-z''',dots, (-1)^{n-1}z^{(2n-1)}), cr w^{(2i)}(0)=w^{(2i+1)}(1)=0quad (i=0,1,dots, m-1),cr z^{(2j)}(0)=z^{(2j+1)}(1)=0quad (j=0,1,dots, n-1). } $$ Here $f,gin C([0,1] imesmathbb{R}_+^{m+n+2},mathbb{R}_+)$ $(mathbb{R}_+:=[0,+infty))$. Our hypotheses imposed on the nonlinearities $f$ and $g$ are formulated in terms of two linear functions $h_1(x)$ and $h_2(y)$. We use fixed point index theory to establish our main results based on a priori estimates of positive solutions achieved by utilizing nonnegative matrices.
Positive solutions for a system of second-order boundary-value problems involving first-order derivatives
Kun Wang,Zhilin Yang
Electronic Journal of Differential Equations , 2012,
Abstract: In this article we study the existence and multiplicity of positive solutions for the system of second-order boundary value problems involving first order derivatives $$displaylines{ -u''=f(t, u, u', v, v'),cr -v''=g(t, u, u', v, v'),cr u(0)=u'(1)=0,quad v(0)=v'(1)=0. }$$ Here $f,gin C([0,1] imes mathbb{R}_+^{4}, mathbb{R}_+)(mathbb{R}_+:=[0,infty))$. We use fixed point index theory to establish our main results based on a priori estimates achieved by utilizing Jensen's integral inequality for concave functions and $mathbb{R}_+^2$-monotone matrices.
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