论现实主义作为一种阅读方法

“现实主义”作为一种称谓既指作家的创作方式和作品形态,也指阅读方法。作为一种阅读方法,现实主义具有普适性,任何文学作品都可以从现实的角度来阅读和理解,都可以读出现实的价值和意义。从创作的角度来看,任何创作方法都有现实主义的因素,在文学中,“现实”与“非现实”之间不存在绝对的对立,不论是传统文学还是现代主义、后现代主义文学,都有“现实”的成分,因此都可以从现实的角度进行解读。从文学接受的角度来看,任何类型的作品都与现实生活有关,都与人生有关,因此任何文学作品都与现实有关,现实是创作者和接受者沟通的条件,是文学创作和文学接受的基础。按照现实主义的阅读方法阅读非现实主义的作品,本质上是读者的阅读权力。在阅读中,读者可以对文学中的非现实因素进行筛选和还原,得出符合现实的解释。现实主义作为一种阅读方法对读者而言具有重要价值。

Radial Based Probabilistic Roadmap Motion Planning Method in Sparse Environment

A new dynamic path planning method in high dimensional workspace, radial based probabilistic roadmap motion (RBPRM) planning method, is presented. Different from general probabilistic roadmap motion planning methods, it uses straight lines as long as possible to construct a path graph, so the final path obtained from the graph is relatively shorter and straighter. Experimental results show the efficiency of the algorithm in finding shorter paths in sparse environment.

Bed Load Transport Rates during Scouring and Armoring Processes

Dambreak-induced bed scouring may undermine the foundation of bridge piers and other structures,and that destruction can pose a serious threat.Consequently,this paper aims at exploring the mechanisms of scouring and armoring.Firstly,the incipient velocity for nonuniform sediment particles was studied,and a formula was derived based on the angle of repose of nonuniform sediment.The results showed that the mechanism of incipient motion for sand and fine gravel differed from that for coarse gravel and cobbles.Also,comparison between experimental and field data shows that the results from the proposed formula agree well with those observed for all conditions.Secondly,a birth-death,immigration-emigration Markov process was developed to describe the bed load transport rate associated with scouring and armoring.The comparison between experimental data and computed results shows that our model can predict the bed load transport rate,although there may be some limitations,the chief of which is that there are many variables in the model to be determined through experiment.This makes its application in river engineering inconvenient.

ON MULTI-SUBSTANTIAL STRUCTURES OF MERIDIANS

Due to the limited cognition of meridian structure, the study of the essence of meridian phenomenon is faced with obstruction. This paper aims to expound on the multi-substantial structures of meridians and put forward hypothesis on multi-substantial structures of meridians based on embryology.

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.

数学教学中的逻辑教学问题

本文论述了逻辑教学的意义,数学教学与逻辑教学的关系,分析研究了传统的中学数学教学在训练和培养学生逻辑思维能力方面的不足,探讨了改革中学数学教学的途径.

Solving the Perennial Problems of Inadequate Physical Laboratories in Africa Through the Use of Virtual Reality Technology and Tools

The major restriction for learning in science and engineering education in Africa is the absence of equipped laboratories. Where laboratory is available, there is the problem of obsolete and antiquated materials, which are seldom available for use. In most Universities in Africa, there is inadequate supply of laboratory space and laboratory materials. The laboratories only have the items of equipment that were provided when the universities were established, this has hampered learning. An alternative educational approach is required to address the aforementioned problems and provide a cost-effective solution for education as well as a valuable complementary or learning tool for university students. The alternative approach is the use of Virtual Reality （VR） technology to simulate virtual learning environments such as virtual reality laboratories. This is a one solution to inadequate physical laboratories in Africa.

Experimental realization of single-shot nonadiabatic holonomic gates in nuclear spins

Nonadiabatic holonomic quantum computation has received increasing attention due to its robustness against control errors. However, all the previous schemes have to use at least two sequentially implemented gates to realize a general one-qubit gate. Based on two recent reports, we construct two Hamiltonians and experimentally realized nonadiabatic holonomic gates by a single-shot implementation in a two-qubit nuclear magnetic resonance （NMR） system. Two noncommuting one-qubit holonomic gates, rotating along .~ and ~ axes respectively, are implemented by evolving a work qubit and an ancillary qubit nonadiabatically following a quantum circuit designed. Using a sequence compiler developed for NMR quantum information processor, we optimize the whole pulse sequence, minimizing the total error of the implementation. Finally, all the nonadiabatic holonomic gates reach high unattenuated experimental fidelities over 98%.

Estimation of anthracnose dynamics by nonlinear filtering

In this work, we apply the nonlinear filtering theory to the estimation of the partially observed dynamics of anthracnose which is a phytopathology. The signal here is the inhi- bition rate and the observations are the fruit volume and the rotted volume. We propose stochastic models based on deterministic models studied previously in the literature, in order to represent the noise introduced by uncontrolled variations on parameters and errors on the measurements. Under the assumption of Brownian noises, we prove the well-posedness of the models in either they take into account the space variable or not. The filtering problem is solved for the nonspatial model giving Zakai and Kushner- Stratonovich equations satisfied respectively by the unnormalized and the normalized conditional distribution of the signal with respect to the observations. A prevision prob- lem and a discrete filtering problem are also studied for the realistic cases of discrete and possibly incomplete observations. We illustrate the filter behavior through figures displaying the average estimation relative error and a 95% confidence region obtained after a hundred of numerical simulations with initial conditions taken randomly with respect to uniform law.