Theoretical Analysis and Experimental Evidence of Non-Fourier Heat Conduction Behavior

This paper consists of two parts. (1) For a hollow sphere with sudden temperature changes on its inner and outer surfaces, the hyperbolic heat conduction equation is employed to describe this extreme thermal case and an analytical expression of its temperature distribution is obtained. According to the expression, the non-Fourier heat conduction behavior that will appear in the hollow sphere is studied and some qualitative conditions that will result in distinct non-Fourier behavior in the medium is ultimately attained. (2) A novel experiment to observe non-Fourier heat conduction behavior in porous material (mainly ordinary duplicating paper) heated by a microsecond laser pulse is presented. The conditions for observing distinct non-Fourier heat conduction behavior in the experimental sample agree well with the theoretical results qualitatively.

Construction of a New Fractional Chaotic System and Generalized Synchronization

In this paper a new dynamic system with integer and fractional order is investigated. It is shown that determining the effect of quadratic coefficients to the systematic structure can be converted to determining that of coefficients of the linear part. Under some parametric conditions, the system can produce chaotic attractors similar as Lorenz attractor. A constructive theorem is proposed for generalized synchronization related to the fractional-order chaotic system and an application of this new system is demonstrated.

Theoretical Approach to Concentration Distribution and Adhesion Efficiency of Fine Particles Around a Rising Bubble in Slurry Systems

Quantitative prediction of distribution function and adhesionefficiency of particles around a rising bubble in slurry systems ispresented in this work. By solving the convection-diffusion equation(Fokker-Planck equation), the influence of Brownian diffusivity offine particles on concentration distribution and adhesion efficiencyis demonstrated with the hydrodynamic force and van der Waalsattractive potential between particles and bubble considered. It isfound that two kinds of mechanism dominate the adhesion process ofparticles on bubble according to different Peclet number or size ofparticles and bubble, as well as other properties of the slurrysystems. In addition, the viscosity ratio of bubble to the suspendingfluid was found to have obvious influence on particle adhesion.

Boundary Value Problems for First Order Stochastic Differential Equations

In this paper,we present a new technique to study nonlinear stochastic differential equations with periodic boundary value condition(in the sense of expec- tation).Our main idea is to decompose the stochastic process into a deterministic term and a new stochastic term with zero mean value.Then by using the contraction mapping principle and Leray-Schauder fixed point theorem,we obtain the existence theorem.Finally,we explain our main results by an elementary example.

Molecular cloning and transcriptional analysis of a NPY receptor-like in common Chinese cuttlefish Sepiella japonica

Neuropeptide Y(NPY) has a pivotal role in the regulation of many physiological processes. In this study, the gene encoding a NPY receptor-like from the common Chinese cuttlefish Sepiella japonica( SjNPYR-like) was identified and characterized. The full-length SjNPYR-like cDNA was cloned containing a 492-bp of 5′ untranslated region(UTR), 1 182 bp open reading frame(ORF) encoding a protein of 393 amino acid residues, and 228 bp of 3′ UTR. The putative protein was predicted to have a molecular weight of 45.54 kDa and an isoelectric point(pI) of 8.13. By informatic analyses, SjNPYR-like was identified as belonging to the class A G protein coupled receptor(GPCR) family(the rhodopsin-type). The amino acid sequence contained 12 potential phosphorylation sites and five predicted N-linked glycosylation sites. Multiple sequence alignment and 3D structure modeling were conducted to clarify SjNPYR bioinformatics characteristics. Phylogenetic analysis identifies it as an NPYR with identity of 33% to Lymnaea stagnalis NPFR. Transmembrane properties of SjNPYR-like were demonstrated in vitro using HEK293 cells and the p EGFP-N1 plasmid. Relative quantifi cation of SjNPYR-like mRNA level confi rmed a high level expression and broad distribution of SjNPYR-like in various tissues of female S. japonica. In addition, the transcriptional profile of SjNPYR-like in the brain, liver, and ovary during gonadal development was analyzed. The results provide basic understanding on the molecular characteristics of SjNPYR-like and its potentially physical functions.

Theoretical Study and Analysis on Properties of Filter Aids

Pressure filtration and filter aids should be adopted in filtration of high-viscosity molten chemical fiber containing foreign materials and gel particles. Theoretical analysis and argumentations on manners of assisted filtration and specific requirements of filter aids are performed. Measurement and comparison on properties of several filter aids are also carried out, conclusions and suggestions are put forward.

Design of ADS-B Simulator

In this paper, the ADS-B （automatic dependent surveillance-broadcast） used for manned aircrafts is chosen for aSee-and-Avoid sensor of UAV （unmanned aerial vehicle）, then GDL90 type is selected among three types of ADS-B. The serialcommunication data protocol which communicates between GDL90 and control panel of GDL90 is analyzed and tailored for theinterface of the GDL90 simulator here. This ADS-B （GDL90） simulator sends intruder information to FCC （flight control computer）of UAV for collision avoidance function.

Theoretical Study of Electron Transferin Bimolecular System of NH_3 and H_2O

Mulliken, NPA, MK and CHelpG population analyses have been accomplished at the level of MP2/6-31G（d,p） for the title system. The variations of four kinds of charges on NH3 with intermolecular distance infer that electron transfers from NH3 to H2O. MK and CHelpG population analyses indicate more electron transfer than Mulliken and NPA ones. The atomic charges resulted from MK and CHelpG schemes infer that electron transfers from N in NH3 to H in H2O, which confirms that this bimolecular complex possesses linear structure as H3N…HOH.

土地行政公益诉讼的类型建构及展开

在行政公益诉讼总论研究的基础上,分领域展开类型化研究,是完善行政公益诉讼制度的一项基础作业。土地具有自然资源和自然资源资产的双重属性、国家作为土地资源管理者和国有土地资产所有者的双重角色,决定了土地行政公益诉讼相较于环境保护、食药安全等领域的特殊性。具体而言,行政机关不依法履行土地资源管理职责案件中的社会公共利益表现为合理用地的公共秩序,审查难点在于把握行政权、审判权、检察权的分工与合作关系;行政机关不依法履行国有土地资产管理职责案件中的国家利益表现为国有土地资产所有者权益,审查难点在于平衡中央与地方、国家与第三人利益。以土地管理领域为切入点的类型化尝试,展示出行政公益诉讼分论研究具有传导立法需求信号、助推法治政府建设、优化检察机关内部划界与合作、提升办案人员法律适用能力的方法论意义。

In-band pumping avenue based high power superfluorescent fiber source with record power and near-diffraction-limited beam quality

High power superfluorescent fiber sources(SFSs), which could find wide applications in many fields such as middle infrared laser generation, Raman fiber laser pumping and spectral beam combination, have experienced a flourishing time in recent years for its unique properties, such as short coherence length and high temporal stability. The challenge for performance scalability of powerful SFS mainly lies on the physical issues including parasitic laser oscillation and modal instability(MI). In this contribution, by employing in-band pumping avenue and high-order transverse-mode management, we explore a high power SFS with record power, near-diffraction-limited beam quality and spectral manipulation flexibility. An ultimate output power of 3.14 kW can be obtained with high temporal stability and a beam quality of M^2= 1.59 for the amplified light. Furthermore, the dynamics of spectral evolutions, including redshifting of central wavelength and unsymmetrical broadening in spectral wings, of the main amplifier with different seed linewidths are investigated contrastively. Benefiting from the unique high pump brightness and high MI threshold of in-band pumping scheme, the demonstrated system also manifests promising performance scaling potential.

Flow Field and Performance of Cross Flow Fans——Experimental and Theoretical Investigations

Due to the construction and the operating principle the prediction of performance of Cross Flow Fans (CFF) is difficult and the knowledge about the internal flow regime is limited. To investigate the impact of geometrical parameters on the performance of CFF, experimental investigations, using Particle Imaging Velocimetry (PIV), and CFD calculations were carried out. Some results of PIV measurements and CFD calculations are presented, which give an impression of the internal flow and confirm the numerical calculations.

The Existence and Non-Existence of Global Solutions for a Nonlinear Wave Equation

This paper deals with the existence and uniqueness of the global solution of the initial boundary value problem of a class of wave equation.In the meantime,it gives the sufficient conditions of blow-up of the solution for the problem in finite time.