菜籽凝聚机的研究

通过对菜籽凝聚机生产性试验研究，探求了凝聚机的工作性能和结构参数，在试验过程中测得的数据基本上达到了预定的要求，并对测得的数据进行了分析，找出了存在的问题及解决的方法，为今后进一步的研究打下了可靠的基础。

凝聚出精兵、精思、精品——从《当代中华凝聚力》看精神生产机制

凝聚是力的组合,是资源的优化,是能量的升华,是思想的纽带,是心灵的和鸣……因此,凝聚本身就是一门艺术,是艺术的绩效或成果。诚然,这里所说的艺术,是指一种优质高效地组织学术理论活动的机制、技巧和方法。由范英、丁富华主编,中共中央党校出版社出版的《当代中华凝聚力》,洋洋洒洒110万字,是广东理论界一批专家、

Empirical Analysis on Influence Mechanism of Cohesiveness and Collective Efficacy of Virtual Community Based on Triadic Reciprocal Determinism

The virtual community has become a new life style as for human,but the public's acceptance is relatively low at present.So the research about the mechanism of the influence on the cohesiveness and the collective efficiency in virtual community has an important theoretical value and practical value.In the paper,the key variables that affect virtual community cohesiveness are extracted from two aspects—self-perception of community members and community environment,and the influence mechanism model of virtual community cohesiveness and community collective efficiency is established based on Triadic Reciprocal Determinism.By means of the questionnaire on the community members and the empirical analysis,the key factors influencing cohesiveness of virtual community are brought up,as well as the mechanism that the four dimensions of cohesiveness work,on collective efficiency.According to the results,it is practically meaningful that the problems and insufficiency in the operation of existing virtual community are discovered,which guides the operating managers of the virtual community to formulate operation policy of the virtual community for operating managers to develop strategies.

Insight into Flocculation Mechanism of Chitosan

Grain analyzer, turbidimeter, Zeta potential instrument and microscope with Panansonic CCD are used to analyse the distribution of the bentonite grain, test the Zeta potential of bentonite and observe the structure of floes. Through the comparison among chitosan, PAM, and aluminum salt, it can be inferred that the flocculation mechanism of chitosan is something like interpartical bridging of PAM rather than the electrical neutralization by prositive charge.

Photo-oxidation of Isoprene with Organic Seed： Estimates of Aerosol Size Distributions Evolution and Formation Rates

Indoor smog chamber experiments have been conducted to investigate the dynamics of sec- ondary organic aerosol （SOA） formation from OH-initiated photo-oxidation of isoprene in the presence of organic seed aerosol. The dependence of the size distributions of SOA on both the level of pre-existing particles generated in situ from the photo-oxidation of trace hydrocarbons of indoor atmosphere and the concentration of precursor, has been investi- gated. It was shown that in the presence of high-level seed aerosol and low-level isoprene （typical urban atmospheric conditions）, particle growth due to condensation of secondary organic products on pre-existing particles dominated; while in the presence of low-level seed aerosol and comparatively high-level isoprene （typical atmospheric conditions in rural re-gion）, bimodal structures appeared in the size distributions of SOA, which corresponded to new particle formation resulting from homogeneous nucleation and particle growth due to condensation of secondary organic products on the per-existing particles respectively. The effects of concentrations of organic seed particles on SOA were also investigated. The particle size distributions evolutions as well as the corresponding formation rates of new particles in different conditions were also estimated.

INTERACTION MECHANISM OF ORGANIC MATTER WITH GEL TYPE POLYSTYRENE STRONGLY BASIC ANION EXCHANGE RESIN AND REGENERATION OF THE ORGANISM FOULED RESIN Ⅰ.The interreaction mechanism between strongly basic anion exchange resin and organic matter

It was generally considered that contamination of the gel type polystyrenestrong basic anion exchange resin by organic matter in natural water is the result ofion exchange and Van der waal's adsorption on it. On the basis of laboratory and industrial experiments, this paper confirmed that the interreaction between organicmatter and resin polymer matrix is primarily controled by a Van der waal's adsorption.

Rheological Properties of Recycled Aggregate Concrete Using Superplasticizers

The mechanical properties of recycled aggregates concrete from demolition have been studied for several years. It has been documented that rheological properties of these concrete are generally affected by use of recycled aggregates. They could present mechanical properties less affected by the presence of recycled aggregates if the initial concrete were of good quality. However, manufacturing problems, mainly attributed to the angular character of these aggregates and to the granulometry of recycled sand, limit their industrial use. The worth point of this study consists in the optimization of the concrete formulation using specific admixture, adapted to this aggregates in order to facilitate its manufacturing. It shows that the new generation of superplasticizers containing some copolymer polycarboxylate makes it possible to significantly improve the fluidity of the recycled aggregates concrete in its fresh state. The aim of this research is to control rheologica] properties of fresh recycled aggregates concrete with fine and coarse recycled aggregates to limit the negative influence of aggregates on mechanical properties of concrete.

Exploration of the effective way of the training management of the ＂apprenticeship＂ of teachers

Implement the innovation of the ＂apprenticeship＂ training method in the teachers, explore the effective ways of cultivating the young teachers and the transferred teachers, determine the guidance teachers and the training objects through the combination of rec- ommendation and self-recommendation, sign the mentoring agreement, establish the scientific and effective assessment and incentive mechanisms, to promote the healthy growth of the groups of teachers and the orderly cohesion the replacement of the old and new teachers.

The Tatonnement of Leon Walras and Diagonal Dominant Hypothesis

This essay poses Walras＇s theory of price mechanism in its merits and limitations. Walras proposed two laws as conditions for general equilibrium, namely： （1） the law of the variation of equilibrium prices, a subjective condition; and （2） the law of the establishment of equilibrium prices, an objective condition. Walras jointed both laws in order to develop his law of supply and demand. This paper offers a formal Walrasian approximation in terms of the Lyapounov＇s function, taking the diagonal dominant hypothesis as departure point, rediscovered almost a century after it was originally proposed by Walras. The paper concludes with critical reflection concerning the idea of equilibrium economics as medium of social cohesion.

Higgs type excitations in cold atom systems

Higgs type excitations are the excitations which give mass to particles. The Higgs type excitations has a critical role both in particle physics and condensed matter physics. In particle physics, the suspected Higgs boson has been found by the Large Hadron Collider （LHC） in 2012. In condensed matter physics, the Higgs type excitations relate to order phase of the system. In this review, we present an overview of recent studies on the Higgs type excitations both in non-interacting and interacting cold atom systems. First, in non-interacting cold atom system, by synthesizing artificial non-Abelian gauge potential, we demonstrate that when a non- Abelian gauge potential is reduced to Abeliau potential, the Abelian part constructs spin-orbit coupling, and the non-Abelian part emerges Higgs excitations. Secondly, the Higgs excitations which are the reputed Higgs amplitude mode in interacting cold atom system are discussed. We review the theoretical model and the experimental detection of Higgs amplitude mode in two dimensional superfluid. The observation of both Higgs type excitations in real experiments are also discussed.

Optomechanical Dark State in a Dual-Species Bose-Einstein Condensate

We study cavity optomechanics of ultracold dual-species atomic mixtures with nonlinear collisions.Interspecies interactions provide a direct parametric coupling of fictitious mechanical elements which,through interfering with the intracavity optical field,leads to a switchable optically-dark state for either species.This demonstrates a matterwave analog of recently observed mechanical wave mixing and quantum motional-state swapping,with applications in the construction of integrated phononic devices,and the cavity-enhanced detection of quantum degenerate atomic mixtures.

Vortex fluidic mediated one-step fabrication of polyvinyl alcohol hydrogel films with tunable surface morphologies and enhanced self-healing properties

Previous strategies for controlling the surface morphologies of polyvinyl alcohol(PVA)-based hydrogels,including freeze-drying and electrospinning,require a posttreatment process,which can affect the final textures and properties of the hydrogels.Of particular interest,it is almost impossible to control the surface morphology during the formation of PVA hydrogels using these approaches.The strategy reported in this study used the novel vortex fluidic device(VFD)technology,which for the first time provided an opportunity for one-step fabrication of PVA hydrogel films.PVA hydrogels with different surface morphologies could be readily fabricated using a VFD.By also reducing the crosslinking agent concentration,a self-healing gel with enhanced fracture stress(60%greater than that of traditionally made hydrogel)was achieved.Interestingly,the associated selfhealing property remained unchanged during the 260-s mechanical testing performed with the strain rate of 5%s-1.The VFD can effectively tune the surface morphologies of the PVA-based hydrogels and their associated properties,particularly the self-healing property.