Application of annexation principle to the study of thermodynamic properties of Ag—Bi—In metallic melts

Based on the measured activities,the phase diagrams and the annexation principle,the calculating models of mass action concentrations for Ag-Bi and Ag-Bi-In melts have been formulated.The calculated results agree with practice and obey the mass action law,showing that the models formulated can reflect the structural characteristics of both melts.Meanwhile,it confirms that annexation principle is applicable to the Ag-Bi-In metallic melts.The melts involving eutectic which give rise to phase separation,and in which activcities exhibit positive deviation from Raoult‘s law is the basic cause of melts transforming from homogeneous to heterogeneous ones.     

Application of Grey Associative Analysis to the Assessment of Regional Water Security

The assessment of water security is an important content in the security management of water resources due to the fact that the state of water security directly affects both the sustainable development of regional economy and the improvement on the living quality of mankind. Grey associative analysis is introduced and applied to assessment of water security on the basis of grey characteristics of the assessment index system of water security. As a case study shows, grey associative analysis is used for evaluating water security of some provinces in China, and the satisfactory assessment results are obtained. The sequence of provinces in China with regard to water security from good to poor is obtained and, moreover, the water security level of each region is also confirmed. The results obtained accord with the actual state of each region. They are of practical significance and can be used to guide the management of regional water security and a sustainable development of the economy therein. At the same time, the results demonstrate that grey associative analysis provides a new method for assessing water security     

Discussion of the Constitutive Relation on Cyclic Stress-Strain of Engineering Materials

Based on the experimental results and analysis of the cyclic deformation, there is an obvious yield stage on the cyclic stress-strain curve at the stage of small plastic deformation (in room or low temperatures). This phenomenon is similar to that of monotonic tensile curve case. But for the former the deformation amount at which the yield begins is much smaller than that for the latter. The cyclic stress-strain constitutive relation needs to be further studied according to the actual cyclic stress-strain curve. The conventional constitutive equation σ=Aεn is based on the results only corresponding to the cyclic strengthening stage. It is not appropriate for the stage of the small plastic deformation and the stage of yield.     

In-plane load measuring technique for the strength test of MEMS micro-cantilever

An in-plane load measuring technique is developed to perform the strength test of the micro-cantilever. Based on electromagnetism theorem, Micro UTM (Universal Testing Machine) was in-house made with the load range ±1 N and the displacement range ±300 μm. It applies an in-plane load on the free-end of the micro-cantilever. The load acts as a bending moment for the root of the cantilever, but as a torque for the anchor. The results show that for samples with different sizes the ultimate loads range from 1.3 to 69.8 mN and the calculated torque is ap-proximately proportional to the square of the bonding length. Two failure modes, fracture at the root of the cantilever and fracture at the anchor, are observed by micro examination to the debris, which indicates that there is a critical design to achieve the strength bal-ance between the cantilever and the anchor. The work demonstrates that Micro UTM is a powerful in-strument for the strength test of the micro-cantilever and similar micro-structures.     

Study on the Leukocyte Filtration Model of Nonwoven Media

The filtration coefficient before filtration (λ-0)is intro-duced and a mathematical model for the leukocyte filtra-tion process, which relates to the filtration efficieney,capacity and leukoeyte concentration, filter thickness and fliter surface area, is established according to the mass balance for particles in a filter and the particle concen-tration decrease per unit of filter depth. The model can be uded to calculate the filtration efficiency or capacity.It is found that the filtration performance observed dur-ing the experiments could be explained well by the mod-el.The established model can be applied to the design and optimization of ungrafted and grafted melt blown nonwoven filtration materials.     

Predicting the Maximum Load of Reinforced-Concrete Pipe Columns

To simplify the calculation of the maximum load at which instability occurs for reinforced-concrete pipe columns under eccentric compression, a method based on the transformed cross-sectional area of the column and the concrete secant modulus of elasticity is proposed, consisting of an iterative process in which a sequence of lateral deflections is at column mid-height. The method assumes the deflected shape of the column as a half cosine wave. Analytical results were compared with experimental values obtained from 16 reinforced-concrete pipe columns. Using deflection at column mid-height recorded during the loading process, a typical load-deflection curve can be plotted and used to describe column behavior. The experimental results demonstrate that the failure of concrete columns is a process. The starting point is the cracking load point, when cracks are initiated in the concrete of the tensile zone of the critical cross-section of specimens. The maximum load point is the top of the failure process, and then the maximum bending moment occurs. The first point represents instability while the second one corresponds to the strength failure of the columns. The experimental results are close to the analytical values. The method is simple and can be used for stability analysis of reinforced-concrete pipe columns.     

Molecular modeling of the ion channel-like nanotube structure of amyloid β-peptide

The ion channel-like nanotube structure of the oligomers of amyloid β-peptide (Aβ) was first investi-gated by molecular modeling. The results reveal that the hydrogen bond net is one of the key factors to stabilize the structure. The hydrophobicity distribution mode of the side chains is in favor of the structure inserting into the bilayers and forming a hydrophilic pore. The lumen space is under the control of the negative potential,weaker but spreading continuously,to which the cation selectivity attributes; meanwhile,the alternate distribution of the stronger positive and negative potentials makes the electrostatic distribution of the structure framework balance,which is also one of the key factors stabilizing the structure. The results lay the theoretical foundation for illuminating the structure stability and the ion permeability,and give a clue to elucidating the molecular mechanism of Alzheimer's dis-ease (AD) and designing novel drugs to prevent or reverse AD at the root.     

Estimation of Mutual Coupling Coefficient of the Array by Simulated Annealing Algorithm

We propose a method for estimating the mutual coupling coefficient among antennas in this paper which is based on the principle of signal subspace and the simulated annealing （SA） algorithm. The computer simulation has been conducted to illustrate the＇ excellent performance of this method and to demonstrate that it is statistically efficient. The benefit of this new method is that calibration signals and unknown signals can be received simultaneously, during the course of calibration.     

The U/Θ effect of electricity parameters of the lotus root silk in the liquor with different pH values

The silk of lotus root is a kind of natural biomaterial with the advantages of easy absorbing and dissolving and poisonless. It may become a new engineering material for clinic and tissue engineering. However, the relationship between its electricity parameters and the pH values of the liquor that the silk is dipped in is unknown presently. The electricity parameters of inductance, capacitance and impedance of the silk were measured in the environment with the temperature ranging from 23℃ to 25℃ and the humidity ranging from 45% to 55% when it was dipped in the liquor with different pH values for 24 h. The results show that the inductance and impedance vary in U shape curves with the liquor pH value, and the capacitance varies in Ω shape curve. The minimal value of the U curves and the maximal value of the Ω curve appear at the point where the pH value equals to 7. The phenomena are called the U/Ω effect. It means that the silk has perfect biocompatibility with human tissues. The study results may imply that the silk have broader potential applications in biomedicine, tissue engineering and bioelectronics.     

Stylistic Analysis of The Nightingale and the Rose

Oscar Wilde accomplished great success in conducting one of his works The Nightingale and the Rose This essay tries to analyze its article success in various stylistic levels, which is supposed to be helpful for teachers to conduct their classroom teaching of the material. Furthermore, this essay is bond to be very useful for those English majors by providing a guideline for their deeper and further appreciation of the article.     

Nonlinear Finite Element Analysis of the Structure of Door Seals

In order to evaluate the influence of the seal structure on door dosing force, nonlinear finite dement methed is introduced to analyze compression deformation of a door seal for SANTANA （name of the car made by Shanghai Volkswagen Co. Ltd）. MSC. Marc software is used to analyze the large deformation of the seal and the compression test is done to prove the computational results. The results show that the compression loads of the door seal are larger than the standard value of Shanghai Volkswagen Co. Ltd and the seal structure needs to be optimized. There are consistent relationships between calculating results and experimental results and the simulation method is effective.     

Effect of Chemical Structure on Molecular Properties of Hyperbranched Polycarbosilanes

1 Results In spite of the increased interest to the synthesis of hyperbranched polymers,there is a lack of studies of conformational properties of their macromolecules.Structural features of hyperbranched polymers are responsible for new properties that distinguish them from linear compounds and open unique possibilities for their applications.The knowledge of the "structure-properties" relationships is of fundamental value,it also can be helpful when developing new technologies and new materials. The goal of the work is to study hydrodynamic and molecular properties of hyperbranched polymers depending on their molar mass (MM) and on the linear chain length between the branching points of macromolecules.     

Optimization and application of blasting parameters based on the “pushing-wall” mechanism

The large structure parameter of a sublevel caving method was used in Beiminghe iron mine. The ores were generally lower than the medium hardness and easy to be drilled and blasted. However, the questions of boulder yield, "pushing-wall" accident rate, and brow damage rate were not effectively controlled in practical blasting. The model test of a similar material shows that the charge concentration of bottom blastholes in the sector is too high; the pushing wall is the fundamental reason for the poor blasting effect. One of the main methods to adjust the explosive distribution is to increase the length of charged blastholes. Therefore, the field tests with respect to increasing the length of uncharged blastholes were made in 12# stope of -95 subsection and 6# stope of Beiminghe iron mine. This paper took the test result of 12# stope as an example to analyze the impact of charge structure on blasting effect and design an appropriate blasting parameter that is to similar to No.12 stope.     

Action Research:the Significant Via of Foreign Language Teaching

Action research is a methods for the combination of teaching and research.Due to its operativeness the method is paid more and more attention.The paper introduces the origin,the definition and charateristic,describes the process and put forward its significence for the teachers.     

Physiological response of natural plants to the change of groundwater level in the lower reaches of Tarim River, Xinjiang

Based on the analysis of the three-year (2000-2002) monitoring data of the four times intermittent stream water conveyance to the lower reaches of Tarim River where the stream flow was dried up for more than 30 years and the measurement of PRO, SOD and POD in plants collected from 24 vegetation plots, it is concluded that the stream water conveyance plays an important role in lifting groundwater level. The groundwater nearby the watercourse was raised from 5～8 m in depth before the stream water conveyance to 2.5～5 m after stream water conveyance. The physiological response of Phragmites communis, Tamarix spp. And Populus euphratica to the change of groundwater is sensitive and represents a grads change obviously. The growth of the plants in the lower reaches of Tarim River is stressed by drought to various degrees. Lengthways, the drought stress exposed to the plants increases with groundwater depth from the upper sections to the lower sections; and breadthwise, the drought stress exposed to the plants is increased with the increase of distance away from the river channel of stream intermittent water releases and of the groundwater depth. Combining the field investigation and the analysis of the plots, it is considered that the stress groundwater depths for the Phragmites communis, Tamarix spp. And Populus euphratica are 3.5 m, 5 m and 4.5 m respectively.     

The U/Ω effect of electricity parameters of the lotus root silk in the liquor with different pH values

The silk of lotus root is a kind of natural biomaterial with the advantages of easy absorbing and dis-solving and poisonless. It may become a new engineering material for clinic and tissue engineering. However, the relationship between its electricity parameters and the pH values of the liquor that the silk is dipped in is unknown presently. The electricity parameters of inductance, capacitance and imped-ance of the silk were measured in the environment with the temperature ranging from 23℃ to 25℃ and the humidity ranging from 45% to 55% when it was dipped in the liquor with different pH values for 24 h. The results show that the inductance and impedance vary in U shape curves with the liquor pH value, and the capacitance varies in Ω shape curve. The minimal value of the U curves and the maximal value of the Ω curve appear at the point where the pH value equals to 7. The phenomena are called the U/Ω effect. It means that the silk has perfect biocompatibility with human tissues. The study results may imply that the silk have broader potential applications in biomedicine, tissue engineering and bioelec-tronics. silk of lotus root, biomedicine engineering material, U/Ω effect, pH value of liquor     

Contributing to Sustainable Development——The Mission and Value of Higher Education

Some notes on sustainable development and scientific outlook on development were given. It is addressed that the mission of higher education to contribute to sustainable development should be reinforced and further expanded. The present situation of China's higher education and the improvements required were analyzed. Two modes of thinking (reductionism and holism) and the relationship between the mode of thinking and the mode of development were discussed. The change in the mode of thinking is the key point for Chinese higher education, and more intensive reform of teaching affairs is necessary. A proposal of the revision of China's Higher Education Act and University Constitutions was put forward.     

Adsorption of polyelectrolyte on the surface of ZnO nanoparticles and the stability of colloidal dispersions

How to prevent flocculation is a universal problem in synthesis and application of nanoparticles. Because of high surface activity, nanoparticles tend to form large di-mension of aggregates with some loose contact interface. When solid particles are suspended in polyelectrolyte so-lution, polymer chains are adsorbed on the surface of par-ticles and they render to stabilize the corresponding parti-cles. The stabilizing property of polyelectrolytes is the reason for wide application in many fiel…     

Eustacia——Victim of Fate——On Thomas Hardy''''s The Return of the Native

Owing to the influences of Greek's view of fate, Dorset peasant's fatalism and Schopenhauer' s pessimistic philosophy, Hardy showed more or less a pessimistic tendency in his early writings and this tendency illustrated itself in his writing of Eustacia, heroine of The Return of the Native. He believed that Eustacia' s tragedy resulted from the disagreement between her aspiration for a brilliant life outside Egdon Heath and the fate imposed on her by some mysterious force working at odds with her. This is what the paper attempts to prove.