居民消费的计量经济模型实证分析

本文在凯恩斯的绝对收入假说的基础上，分析影响居民消费的其他原因，以及这些因素与消费的相关程度，建立计量经济学模型，并采用中国城镇居民的收入消费等统计资料，对消费函数进行实证分析。文中提出用线性二次指数平滑法估算居民对通货膨胀的预期，并指出不应将居民储蓄视为消费的单一方程计量经济学模型中的解释变量，进而有针对性地提出调节总需求的应对策略。     

贵州省城乡居民10年间膳食结构调查分析

调查了贵州省城乡居民膳食结构。结果表明，１９８２～１９９２年贵州居民膳食结构发生了较大改变，但与中国２０００年推荐膳食目标相比，仍有较大差距，特别是钙与某些维生素摄入量偏低。对此提出了建议。     

Optimal portfolio, consumption and retirement decision under a preference change

We investigate an optimal portfolio, consumption and retirement decision problem in which an economic agent can determine the discretionary stopping time as a retirement time with constant labor wage and disutility. We allow the preference of the agent to be changed before and after retirement. It is assumed that the agent's coefficient of relative risk aversion becomes higher after retirement. Under a constant relative risk aversion (CRRA) utility function, we obtain the optimal policies in closed-forms using martingale methods and variational inequality methods. We give some numerical results of the optimal policies. We also consider the relation between the level of disutility and the labor wage with the optimal retirement wealth level.     

Two properties of fuzzy subquasigroups of a quasigroup

In a recent paper, Biswas (1996) studies two properties of fuzzy subrings of a ring. We extend them to quasigroups and to a certain generalization thereof. In its most basic form the first property is that a fuzzy subquasigroup R of a quasigroup satisfies R(a·a′)=min(R(a),R(a′)) whenever R(a)≠R(a′). The second property relates the cardinalities of level sets of R.     

Conditions for Error Bounds and Bounded Level Sets of Some Merit Functions for the Second-Order Cone Complementarity Problem

Recently this author studied several merit functions systematically for the second-order cone complementarity problem. These merit functions were shown to enjoy some favorable properties, to provide error bounds under the condition of strong monotonicity, and to have bounded level sets under the conditions of monotonicity as well as strict feasibility. In this paper, we weaken the condition of strong monotonicity to the so-called uniform P ^*-property, which is a new concept recently developed for linear and nonlinear transformations on Euclidean Jordan algebra. Moreover, we replace the monotonicity and strict feasibility by the so-called R ₀₁ or R ₀₂-functions to keep the property of bounded level sets. This work is partially supported by National Science Council of Taiwan.     

Level characteristics corresponding to peripheral eigenvalues of a nonnegative matrix

In this paper, we give necessary and sufficient conditions for a set of Jordan blocks to correspond to the peripheral spectrum of a nonnegative matrix. For each eigenvalue, λ, the λ-level characteristic (with respect to the spectral radius) is defined. The necessary and sufficient conditions include a requirement that the λ-level characteristic is majorized by the λ-height characteristic. An algorithm which has been implemented in MATLAB is given to determine when a multiset of Jordan blocks corresponds to the peripheral spectrum of a nonnegative matrix. The algorithm is based on the necessary and sufficient conditions given in this paper.     

Adaptive variational curve smoothing based on level set method

This paper presents an adaptive method for variational curve smoothing based on level set implementation. A suitable cost functional is minimized via solving the derived Euler–Lagrangian equation, of which the discretization is conducted on unstructured triangular meshes by employing a simple and effective finite volume scheme. Through adaptive refinement of the mesh, the geometry features of the given curve can be well resolved in a cost-effective way. Various numerical experiments demonstrate the effectiveness and efficiency of the proposed approach.     

Computation of transmissions and reflections in geometrical optics via the reduced Liouville equation

We develop a numerical scheme for the wave front computation of complete transmissions and reflections in geometrical optics. Such a problem can be formulated by a reduced Liouville equation with a discontinuous local wave speed or index of refraction, arising in the high frequency limit of linear waves through inhomogeneous media. The key idea is to incorporate Snell’s Law of Refraction into the numerical flux for the reduced Liouville equation. This scheme allows a hyperbolic CFL condition, under which positivity, and stabilities in both l^∞ and l¹ norms, are established. Numerical experiments are carried out to demonstrate the validity and accuracy of this new scheme.     

J/ψ→μ+μ- reconstruction in the CMS experiment

In this paper the J/ψ→μ+μ- reconstruction performance in the CMS experiment at the LHC is studied in detail by using B5→ J/ψψ →μμКК events. The reconstruction efficiencies of J/ψ mesons and their decay muons are obtained as a function of the transverse momentum PT and the pseudo-rapidity η. We also study the muon trigger efficiency for this channel with the planned Level-1 trigger and High Level Trigger selection criteria. It was observed that the muon reconstruction efficiency decreases when the two decay muons have a small or large 3D angular separation, which further affects the overall J/ψ reconstruction efficiency.     

混合金属氧化物阳极在海水中的电化学性能

采用热分解方法制备钛基混合金属氧化物阳极 ,用扫描电镜对阳极涂层显微形貌进行了分析 ,并通过实海模拟试验考察了混合金属氧化物阳极在海水阴极保护系统中的使用性能 .SEM分析结果表明 ,混合金属氧化物阳极涂层呈多孔多裂纹的显微结构 ,与其它阳极材料相比 ,此种阳极具有更大的活性表面积 .电化学试验结果表明 ,混合金属氧化物阳极在海水中具有良好的电化学稳定性和电化学活性 ;此外 ,混合金属氧化物阳极在海水中的消耗率很低 ,属于不溶性的阳极材料 ,作为外加电流阴极保护的辅助阳极具有广泛的应用前景