安神益智方对AD模型小鼠学习记忆及脑组织NO、AchE含量的影响

目的:观察"安神益智方"对AD模型小鼠学习记忆能力的影响及其脑组织中NO、AchE含量变化。方法:采用AlCl3灌胃制造AD模型小鼠,中药组用"安神益智方"治疗,西药组用脑复康治疗,造模7天后开始灌胃给药。疗程结束时,测AD模型小鼠学习记忆能力的变化及脑组织中NO、NOS及AchE含量。结果:小鼠跳台试验显示,中药能明显减少东莨菪碱所致学习记忆障碍小鼠5min内错误次数,对亚硝酸钠所致小鼠学习记忆巩固障碍有明显的改善作用,有拮抗乙醇所致小鼠学习记忆再现障碍的作用,与西药组比较,差异有统计学意义(P<0.05～0.01);中药还可降低AD小鼠脑组织中NO、NOS含量及AchE活性,与模型组比较,差异有统计学意义(P<0.05～0.01)。结论:"安神益智方"能增强AD小鼠学习记忆的能力。

Investigation of granite failure precursor under axial load using modified LSTM framework

Granite is usually composed of quartz,biotite,feldspar,and cracks,and the variation characteristics of these components could reflect the deformation and failure process of rock well.Taking granite as an example,the video camera was used to record the deformation and failure process of rock.The distribution of meso-components in video images was then identified.The meso-components of rock failure precursors were also discussed.Moreover,a modified LSTM(long short-term memory method)based on SSA(sparrow search algorithm)was proposed to estimate the change of meso-components of rock failure precursor.It shows that the initiation and expansion of cracks are mainly caused by feldspar and quartz fracture,and when the quartz and feldspar exit the stress framework,rock failure occurs;the second large increase of crack area and the second large decrease of quartz or feldspar area may be used as a precursor of rock failure;the precursor time of rock failure based on meso-scopic components is about 4 s earlier than that observed by the naked eye;the modified LSTM network has the strongest estimation ability for quartz area change,followed by feldspar and biotite,and has the worst estimation ability for cracks;when using the modified LSTM network to predict the precursors of rock instability and failure,quartz and feldspar could be given priority.The results presented herein may provide reference in the investigation of rock failure mechanism.

Long memory of price-volume correlation in metal futures market based on fractal features

An empirical test on long memory between price and trading volume of China metals futures market was given with MF-DCCA method. The empirical results show that long memory feature with a certain period exists in price-volume correlation and a fittther proof was given by analyzing the source of multifractal feature. The empirical results suggest that it is of important practical significance to bring the fractal market theory and other nonlinear theory into the analysis and explanation of the behavior in metal futures market.

Constitutive equation and processing map of equiatomic NiTi shape memory alloy under hot plastic deformation

In order to describe the deformation behavior and the hot workability of equiatomic NiTi shape memory alloy (SMA) during hot deformation, Arrhenius-type constitutive equation and hot processing map of the alloy were developed by hot compression tests at temperatures ranging from 500 to 1100 °C and strain rates ranging from 0.0005 to 0.5 s?1. The results show that the instability region of the hot processing map increases with the increase of deformation extent. The instability occurs in the low and high temperature regions. The instability region presents the adiabatic shear bands at low temperatures, but it exhibits the abnormal growth of the grains at high temperatures. Consequently, it is necessary to avoid processing the equiatomic NiTi SMA in these regions. It is preferable to process the NiTi SMA at the temperatures ranging from 750 to 900 °C.

What Do Those Impressive English Lessons Look Like？

This research aims to explore the characteristics of Chinese students＇ unforgettable English lessons from the qumatitative and qualitative aspects. The research bases on 43 students＇ recalling of their impressive English lessons, and it finds out that four aspects contributing to impressive English lessons which provide insightful ideas for effective English education in China.

Hybrid control based on inverse Prandtl-Ishlinskii model for magnetic shape memory alloy actuator

The hysteresis characteristic is the major deficiency in the positioning control of magnetic shape memory alloy actuator. A Prandtl-Ishlinskii model was developed to characterize the hysteresis of magnetic shape memory alloy actuator. Based on the proposed Prandtl-Ishlinskii model, the inverse Prandtl-Ishlinskii model was established as a feedforward controller to compensate the hysteresis of the magnetic shape memory alloy actuator. For further improving of the positioning precision of the magnetic shape memory alloy actuator, a hybrid control method with hysteresis nonlinear model in feedforward loop was proposed. The control method is separated into two parts: a feedforward loop with inverse Prandtl-Ishlinskii model and a feedback loop with neural network controller. To validate the validity of the proposed control method, a series of simulations and experiments were researched. The simulation and experimental results demonstrate that the maximum error rate of open loop controller based on inverse PI model is 1.72%, the maximum error rate of the hybrid controller based on inverse PI model is 1.37%.

A War at Heart： War Memory and the Friendship Between Taiwan and Korea in Hsiao Chin Tui The Doll of Fate

This paper aims to explore Talwanese people＇s memories of war based on Hsiao Chin Tui＇s novel The Doll of Fate which describes the later period when Japan colonized Taiwan and the youth of Taiwan serve in the military voluntarily. The voluntary is not only influenced by kominka movement, but also is the effect of Japan＇s war discourse of protecting Asia from the fight of Western countries. However, no matter in schools or society, discrimination in colony leads youth＇s anger and forms an invisible power of the discourse of anti-war. Youth in Taiwan gradually doubt of the war idea of Japan, including the fear of death. In this paper, I define the situation as ＂the war of heart＂. This paper focuses on the changing of character＇s mind and spirit. This paper also observes the changing process of the identification of race and mother land. The observation will be a basis to think about the historical meaning of war experience of mobilization and memories of Talwanese people during the colonial period by Japan.

Food Color Memory and Names- A Linguistic Vantage

We name colors of foods with great ease. This process is conventionalized through our cultures and our biological dictates. People identify food colors through words that are again highly constrained. Embodiment of experience and perception deals with these constraints to make color term use a cognitively economical mechanism, keeping numbers of concepts in mind through categorial conceptualization in long term memory. The parallel process that puts together our linguistic and visual information, allows the individual to map a correspondence between the two frames. The result of this mapping is a ＂cognitive color＂ in long term color memory. This paper presents an experiment in triggering long term memory and the response results. The objective was to verify whether individuals＇ cognitive color of well known foods, both raw and cooked, that they had just identified with Natural Color System （NCS） color samples, would be predominantly a primary basic color term, a secondary basic color term, or a complete descriptive utterance. The name used to communicate a desired signification is accessed through the judgement of similarity and difference with a point of reference. In this case, the food color vantage represents the cognitive color remembered.

Analytical Solutions of the Equations One Mechanical Thermal Model of a Helical Spring NiTi for Use in Heat Engine

Shape memory effect is capability of certain materials to recover its original shape after an apparently permanent deformation. The NiTi alloy of the composition is approximately equiatomic and it is the materials that exhibit the best characteristics for application of these properties, especially in the biomedical area, because of their excellent biocompatibility as： in the manufacture of medical and dental instruments, orthodontic wires, orthopedic materials, guide wires, stents, filters and components to realize the less invasive surgeries. In other areas, they are used for confections of electronic keys, spectacle frames, application in controllers, junction of pipes and electronic connectors among others. New research topics involving the application of these alloys super-elasticity are also known as pseudo elasticity. This event has an isothermal nature and involves the storage of potential energy in the shape memory effect and super-elasticity. In this context, this work falls within the scope of use of the technologies being an example of the work undertaken, in the course Graduate of Federal University of Pernambuco in skills in these technologies. It will present the results of a heat engine which engine element is a helical spring made of a NiTi alloy equiatomic with memory effect reversibly. The spring is triggered by a hot source （- 373.15 K） and a cold source （273.15 K）. The machine is capable of producing a reciprocating oscillating between the two sources. Heat equations and the equations that describe the dynamic behavior of the spring were developed. Through the development of dynamic equations, it can determine the minimum mass for the motion of the machine, as well as the instantaneous and average power and overall efficiency. You can check the functionality of the machine by way of the inclination angle of the propeller and the coefficient of static friction. Among the main results, it was observed that the overall performance of the machine compared to the machines of this category showed the feasibility of the project.

英语单词的N种记忆法

开学了,还没回过神的同学可要注意了!(这口气怎么那么像老班～吓,可能是受那几个当老师的朋友传染了=～=)。丁丁听说,一旦思维长期处于休眠状态,可能会造成记忆力减退。想要预防这种情况发生,最好的方式就是运用记忆法加深对储存在脑袋里的东西的印象。很多同学写信来,问丁丁有没有办法能提高记忆力。办法当然有的是,不过最好还是根据自己的实际情况,从中总结出适合自己的有效方法。下面丁丁给大家介绍几种常用的单词记忆法。

Global Attractors of Strong Solutions for the Beam Equation of Memory Type

The model with linear memory arise in the case of a generalized Kirchhoff viscoelastic bar, where a bending-moment relation with memory was considered. In this paper, the exponential decay is proved if the memory kernal satisfies the condition of the exponential decay. Furthermore, we show that the existence of strong global attractor by verifying the condition （C） introduced in [3].

初中英语词汇教学浅议

社会生活的信息化和经济的全球化,使英语的重要性日益突出。英语作为最重要的信息载体之一,已成为人类生活各个领域中使用最广泛的语言。而英语学习尤其是初中的英语基础学习显得尤为重要。英语词汇是英语语言知识的重要组成部分,《英语课程标准》的五级标准中对词汇的要求是"

A NEW DESCENT MEMORY GRADIENT METHOD AND ITS GLOBAL CONVERGENCE

In this article, a new descent memory gradient method without restarts is proposed for solving large scale unconstrained optimization problems. The method has the following attractive properties： 1） The search direction is always a sufficiently descent direction at every iteration without the line search used; 2） The search direction always satisfies the angle property, which is independent of the convexity of the objective function. Under mild conditions, the authors prove that the proposed method has global convergence, and its convergence rate is also investigated. The numerical results show that the new descent memory method is efficient for the given test problems.

Attractors for a von Karman equation with memory

In this paper a von Karman equation with memory,utt + α?2u- γ?utt- integral from n=-∞ to t μ(t- s)?2u(s)ds = [u, F(u)] + h is considered. This equation was considered by several authors. Existing results are mainly devoted to global existence and energy decay. However, the existence of attractors has not yet been considered. Thus, we prove the existence and uniqueness of solutions by using Galerkin method, and then show the existence of a finitedimensional global attractor.

Stochastic Wave Equations with Memory

The authors show the existence and uniqueness of solution for a class of stochastic wave equations with memory. The decay estimate of the energy function of the solution is obtained as well.

Derivation and Global Convergence for Memoryless Non-quasi-Newton Method

In this paper, a new class of memoryless non-quasi-Newton method for solving unconstrained optimization problems is proposed, and the global convergence of this method with inexact line search is proved. Furthermore, we propose a hybrid method that mixes both the memoryless non-quasi-Newton method and the memoryless Perry-Shanno quasi-Newton method. The global convergence of this hybrid memoryless method is proved under mild assumptions. The initial results show that these new methods are efficient for the given test problems. Especially the memoryless non-quasi-Newton method requires little storage and computation, so it is able to efficiently solve large scale optimization problems.

TESTING FOR LONG MEMORY IN THE ASIAN FOREIGN EXCHANGE RATES

In this paper, we use the plug-in and Whittle methods that are based on spectral regression analysis to test for the long memory property in 12 Asian/dollar daily exchange rates. The results according to the plug-in method show that with the exception of Chinese renminbi all series may have long memory properties. The results based on the Whittle method, on the other hand, show that only Japanese yen and Malaysian ringgit may have long memory properties. It is well known that inference about the differencing parameter, d, in presence of structural break in a series entails considerable difficulties. Therefore, given the financial crisis of 1997-1998 in Asia, further tests for unravelling of the memory property and presence of structural break in the exchange rate series are required.

Attractors for a Three-Dimensional Thermo-Mechanical Model of Shape Memory Alloys

In this note, we consider a Fremond model of shape memory alloys. Let us imagine a piece of a shape memory alloy which is fixed on one part of its boundary, and assume that forcing terms, e.g., heat sources and external stress on the remaining part of its boundary, converge to some time-independent functions, in appropriate senses, as time goes to infinity. Under the above assumption, we shall discuss the asymptotic stability for the dynamical system from the viewpoint of the global attractor. More precisely, we generalize the paper dealing with the one-dimensional case. First, we show the existence of the global attractor for the limiting autonomous dynamical system; then we characterize the asymptotic stability for the non-autonomous case by the limiting global attractor.