从“要我读”走向“我要读”——《绝响》导读设计

[设计理念] 这是根据“感悟成长”主题教学的需要而进行的整本书的扩展阅读。本书的导读分别在读前与读后进行。读前，让学生猜测、观察，读书评，知作者，让学生对读物产生亲近感，引发学生强烈的阅读期待，激发学生的阅读兴趣和阅读热情，让他们箭在弦上，蓄势待发，从“要我读”转化为自主寻求的“我要读”。读后，有效发挥作品作用，利用本书丰富生动、各具特色的人物形象，指导学生比较评说，走进人物的心灵深处。从故事的情节、角色到主题意义，从文本言语形式到文本评论，吸收新知识，激发新思考，让学生在参与、交流中思索、成长。

《绝响》:南国影坛的经典诗作——兼谈对“四代半”或“五代半”命名的思考

本文认为,《绝响》是上世纪80年代南国影坛的一部经典作品。影片以诗性的电影笔触进述小人物的故事,更以诗的思考方式面对人物置身其中的历史与他们的问题。然而这种特质与惯常对第五代影片(也包括《绝响》)的界定并不相符,因而也就相应出现了"四代半"或"五代半"的导演命名问题。本文意在借此说明:通行的代群研究模式带有不可避免的缺陷,电影作者研究的新进展有赖于突破该模式、采用新方法。

Optical Reskponse of Metal—Dielectric Composite Containing Interfacial Layers

A phenomenological approach to investigate the effect of interfacial layers on the absorption of metal-dielectric composite at elevated temperatures is put forward by making use of a model in which weakly nonlinear spherical metallic particles with linear concentric shells are randomly embedded in a linear host. Corresponding formulae in terms of the interfacial factor are derived in detail by incorporating Taylor expansion and Drude model. We take composite as numerical calculation. It is concluded that such absorption is dependent not only on the temperature, but also on the properties of interfacial layers. Many other interesting phenomena are shown.

Low-Rate DoS Attack Flows Filtering Based on Frequency Spectral Analysis

In frequency domain,the power spectrum of Low-rate denial of service(LDoS) attacks is totally spread into the spectrum of normal traffic.It is a challenging task to detect and filter LDoS attack flows from the normal traffic.Based on the analysis of LDoS attack flows and legitimate TCP traffic in time and frequency domains,the periodicity of the TCP traffic and LDoS attack flows is explored to facilitate the research of network traffic processing.Hence,an approach of LDoS attack flow filtering based on frequency spectrum analysis is proposed.In this approach,the TCP traffic and LDoS attack flows are transformed from the time domain into the frequency domain.Then the round-trip time(RTT) is estimated by using frequency domain search method.Analysis of amplitude spectrum shows that TCP traffic energy is mainly concentrated on the points of n/RTT.Therefore,a comb filter using infinite impulse response(IIR) filter is designed to filter out the LDoS attack flows in frequency domain,while most legitimate TCP traffic energy at the points of n/RTT are pass through.Experimental results show that the maximum pass rate for legitimate TCP traffic reaches 92.55%,while the maximum filtration rate of LDoS attack flows reaches 81.36%.The proposed approach can effectively filter the LDoS attack flows while less impact on the legitimate TCP traffic.

The Moisturein Capillaries of Building Materials

The behavior of building materials in constructions of civil structures is influenced by the surrounding moisture and it is a crucial for intensively examined field of the construction physics. Most standard building materials are characterized by a porous structure, which results in the ability to receive water in a liquid as well as gaseous form in the inner pores. The water fills the storage space of pores under certain conditions; it is transported and transferred back to the surroundings. Many technical studies show that the moisture monitoring is prevailingly based on experiments. Previous calculating methods introduced, e.g., by Glaser, which became the basis for the standard calculations in many European countries in the 1960s, are not always sufficient with respect to the demands of the civil structures. The moisture influences thermo-insulating properties of the material. By a change of the thermo insulation properties of the construction also the thermal and diffusion scheme of the construction is changed and its thermal resistance is decreasing. Faults in the thermo-technical projects occur when thermal conductivity coefficient L values for material in a dry state are substituted.The aim of the research is to determine the capillary conductivity coefficient as a characteristic material moisture parameter of the building materials by the means of a non-destructive method using the experimentally assembled apparatus developed at the Department of Civil Engineering, Brno University of Technology. Keywords： Capillary conductivity coefficient, moisture transfer, EMWR （electromagnetic microwave radiation）, diffusion

“不一样的花季”三部曲上市

“不一样的花季”三部曲，由儿童文学作家毛芦芦历时3年倾情打造，是首部以“抗战烽火”为背景的少年小说。三部曲由《小城花开》、《柳哑子》和《绝响》3个小长篇组成，以青春与童年的视角对中国对日八年抗战的岁月进行了充满热血与温情的读解。三部小说文字优美细腻，情感震撼人心，韵味悠长，颇具力度，让人联想到日本动画大师宫崎骏的不朽名作《再见萤火虫》。

Probing quantum many-body correlations by universal ramping dynamics

Ramping a physical parameter is one of the most common experimental protocols in studying a quantum system, and ramping dynamics has been widely used in preparing a quantum state and probing physical properties. Here, we present a novel method of probing quantum many-body correlation by ramping dynamics. We ramp a Hamiltonian parameter to the same target value from different initial values and with different velocities, and we show that the first-order correction on the finite ramping velocity is universal and path-independent, revealing a novel quantum many-body correlation function of the equilibrium phases at the target values. We term this method as the non-adiabatic linear response since this is the leading order correction beyond the adiabatic limit. We demonstrate this method experimentally by studying the Bose-Hubbard model with ultracold atoms in three-dimensional optical lattices.Unlike the conventional linear response that reveals whether the quasi-particle dispersion of a quantum phase is gapped or gapless, this probe is more sensitive to whether the quasi-particle lifetime is long enough such that the quantum phase possesses a well-defined quasi-particle description. In the BoseHubbard model, this non-adiabatic linear response is significant in the quantum critical regime where well-defined quasi-particles are absent. And in contrast, this response is vanishingly small in both superfluid and Mott insulators which possess well-defined quasi-particles. Because our proposal uses the most common experimental protocol, we envision that our method can find broad applications in probing various quantum systems.

Thermoluminescence in response to the mass extinction event in Penglaitan Section in Laibin,Guangxi

Thermoluminescence(TL)in marine carbonate has been proposed as a potential proxy for reconstruction of paleoceanography history,and has already been used in defining the Quaternary environment.However,its availability in the geological time scale,such as Permian,is still on debate.The mass extinction event caused by drastic changes of global marine environment in Middle-Late Permian provides a typical example to testify the applicability of this proxy.Here we measured the natural thermoluminescence of the carbonate-dominating marine sediments collected from the strata through the Guadalupian-Lopingian mass extinction boundary(G/LB)in the Penglaitan Section in Laibin,Guangxi,China.Our results reveal that TL intensities of carbonate are much higher than those of siliceous rocks,which indicates that the carbonate is the main contributor to the TL.The variation of TL intensities are related with Mn and Fe contents in the carbonate lattices while high Mn and low Fe(e.g.,high Mn/Fe ratio)in carbonate will release stronger TL.Due to the better storage of carbonate lattices for original information of Mn and Fe in seawater,thermoluminescence of carbonate-dominating sediments/rocks could sensitively reflect marine environment and biological productivity in geological time scale.