基于RFID技术的阅读器二次开发实验系统

使用125kHz射频卡开发了简易的考勤应用系统,软件开发环境采用Visual C++6.0,考勤应用后端数据库采用MS Access数据库;同时为了帮助学生快速了解和掌握VC++环境下软件开发方法,在软件平台上设计了典型开发流程和典型开发演示功能模块,并有源代码查看功能,最终实现了集教学与实用于一体的软件平台。

Analysis and Design of a Quadrature Down-Conversion Mixer for UHF RFID Readers

A quadrature mixer with a shared transconductor stage is analyzed,including voltage conversion gain, linearity, noise figure, and image rejection. The analysis indicates it has better performance than a conventional Gilbert mixer pair in commutating mode. A quadrature down-conversion mixer based on this topology is designed and optimized for an ultra high frequency RFID reader. Operating in the 915MHz ISM band, the presented quadrature mixer measures a conversion gain of 12.5dB,an IIP3 of 10dBm, an IIP2 of 58dBm, and an SSB noise figure of 17.6riB. The chip was fabricated in a 0. 18μm 1P6M RF CMOS process and consumes only 3mA of current from a 1.8V power supply.

Channel Estimation and Throughput Evaluation for 5G Wireless Communication Systems in Various Scenarios on High Speed Railways

The fifth generation （5G） wireless communication is currently a hot research topic and wireless communication systems on high speed railways （HSR） are important applications of 5G technologies. Existing stud- ies about 5G wireless systems on high speed railways （HSR） often utilize ideal channel parameters and are usually based on simple scenarios. In this paper, we evaluate the down- link throughput of 5G HSR communication systems on three typical scenarios including urban, cutting and viaduct with three different channel estimators. The channel parameters of each scenario are generated with tapped delay line （TDL） models through ray-tracing sim- ulations, which can be considered as a good match to practical situations. The channel estimators including least square （LS）, linear minimum mean square error （LMMSE）, and our proposed historical information based ba- sis expansion model （HiBEM）. We analyze the performance of the HiBEM estimator in terms of mean square error （MSE） and evaluate the system throughputs with different channel estimates over each scenario. Simulation results are then provided to corroborate our proposed studies. It is shown that our HiBEM estimator outperforms other estimators and that the sys-tem throughput can reach the highest point in the viaduct scenario.

Investigation of Cross-Correlation Characteristics for Multi-Link Channels in High-Speed Railway Scenarios

This paper investigates the cross-correlation characteristics of large-scale parameters(LSPs) and small-scale fading(SSF) for high-speed railway(HSR) multilink propagation scenarios, based on realistic measurements conducted on Beijing to Tianjin HSR line in China. A long-term evolution-based channel sounding system is utilized in the measurements to obtain the channel data. By applying a proposed time-delay based dynamic partition method, multi-link channel impulse responses are extracted from the raw channel data. Then, the statistical results of LSPs, including shadow fading, K-factor, and root-mean-square delay spread are derived and the cross-correlation coefficients of these LPSs are calculated. Moreover, the SSF spatial correlation and cross-correlation of SSF are analyzed. These results can be used to exploit multi-link channel model and to optimize the next-generation HSR communication system.

How Should We Construct Mind-Readers？

Structured models of kinds of mind-readers are explanatory tools in philosophy and psychology. Structure means that a structure like a theory with certain properties organizes the model of a kind of a reader. Structured models serve to explain mind-reading capabilities in opposition to pure behavior-reading capabilities by explicating properties of the structure that bring on specific capabilities of mind-reading. Typically, grades of fulfilling reading-capabilities are related to grades of rationality. But it is unclear： （1） when we are legitimated to title a reader a mind-reader or behavior-reader, and （2） how the kinds of readers are related with each other （if they can be related by a measure）. I argue that we know a reader if we can construct it and this gives legitimation. But it is unclear how to construct border-cases of readers, for example, minimal mind-readers. Should minimal mind-readers be constructed on the base of ＂reduced＂ mind-readers, or should they be constructed as ＂enriched＂ behavior-readers？ This is the specific question concerning the relations between readers the essay deals with by trying to reduce a maximal mind-reader by Craig-reduction. Because this kind of reduction-method fails, constructing specific kinds of mind-readers needs further research.

Ottoman Mathematicians and Astronomers

The article deals with the scientists in the Ottoman Empire. The readers will get interesting information about the life and practices of those who dedicated their whole life to the development of science, such as Ottoman mathematicians and astronomer Rumi Kadizade from Bursa, Ali Kushchu, Mirim Chalabi, Takiyuddin Bin Maruf-i, Gelenbevi Ismail Efendi, Hoca Ishak Efendi, and Huseyin Tevfik Pasha.

Exploration of Trauma Narrative in The Kite Runner

As the first Afghan novel written in English by Afghan American writer Khaled Hosseini, The Kite Runner provides reader a window into Afghan history and culture as well as the impact of trauma on individuals Through interweaving progagonist Amir＇s personal trauma from sin to self-salvation with the racial and national conflicts as the collective trauma of the Afghan, Khaled Hosseinni not only foregrounds the coming-of-age theme of sin, guilt, and redemption but also successfully presents the racial conflicts and national pain in Afghanstain. Under the framework of trauma theory and through close reading of the novel, the aim of the present paper is to analyze how trauma is narrated in the novel and thus help readers to have a better understanding about the Afghan history and life

Confessions of a Closet Comic Book Reader： How Comics Warped Minds and Challenged Cultural Standards

In 1952, the federal government was called upon to investigate the comic book industry in order to determine if reading comic books influenced juvenile delinquency. The United States could not afford to look weak from any angle; the idea of Communist nations exploiting moral weakness of any kind was frightening to many. However, the Soviets were already aware of moral issues on the American home front that were affecting the health of the nation, such as civil rights, sexism （sexual confusion）, a rise in fascism, and juvenile delinquency. This study will discuss the investigation of the comic book industry as the sole contributors to juvenile delinquent issues, as Fredric Wertham charged in his book Seduction of the Innocent. In addition, this study focuses on the ways in which Entertaining Comics （EC） pushed the envelope and challenged Cold War standards of ideal middle class values. Their creative resistance led to the federal investigation which nearly destroyed the comic book industry. Through these investigations, the federal government re-defined the first amendment as it applied to this type of media as a way to curtail what they believed was the Soviet Union＇s efforts to use our own literature as a propaganda tool for their people.

Utilizing Electronic Reading Device （Kindle） in English as Foreign Language Reading Class

With the evolutionary change in information and communication technologies （ICT）, the definition of literacy has undergone substantial change to include the skills and strategies required to successfully adapt to the rapidly changing ICT contexts. This new definition presents an urgent need to acknowledge the gap between the types of reading experiences students come across at school and those they regularly practice outside the school. One way to bridge such gap is to expand the reading instruction to incorporate electronic reading device, like Kindle, to engage students in electronic reading. Many e-books feature multimodal functionalities, including audio, video, hyperlinks, and interactive tools. Research on this form of reading is still in its infancy in spite of some positive prospects for fostering literacy development and reading comprehension. Therefore, adopting a mixed method approach with 36 college freshmen in central Taiwan, the current study intended to fill in the void by investigating any difference in readers＇ reading comprehension and reading motivation, between the Kindle group and the print-based group. The results indicate that embedding aspects of technology into a traditional reading instruction boosted the participants＇ motivation to read. Nevertheless, the novelty-driven enthusiasm for electronic reading might not sustain students＇ reading motivation long enough to cultivate long-lasting reading habits. The results indicate that there was no significant difference in reading comprehension between two groups. Implications for utilizing electronic readers in EFL classes are also provided.

Guilt, Love, and Forgiveness in David Hare＇s The Reader and Bernhard Schlink＇s Der Vorleser

The paper proposes to investigate feelings of guilt, love, and forgiveness as Hare＇s The Reader （2009）. It will focus on Hare＇s selection of detail in his they manifest themselves in David screenplay The Reader; a dramatic adaptation of Bernhard Schlink＇s novel of 1995. This will involve comparing the novel to the dramatic text for the purpose of showing the movement from narrative to dramatic rendering. The paper aspires to reach the conclusion that Hare＇s screenplay, The Reader creates a world of signification where the interplay of guilt, love, and forgiveness shape the textual and stage space. Read in light of Shoshana Felman＇s The Juridical Unconscious （2002）, the play investigates the traumatic history of Nazi Germany with scope for analysis of guilt and forgiveness and the possibility of atonement through love and literature. The focus of the paper will be on the ideological and formal structure of the play and its impact on meanings and interpretations.

＂Beauty Generates from Distance＂ on the Aesthetic Distance in The Adventures of Huckleberry Finn

Aesthetic distance in literature refers to the distance between the reader and the work which is controlled by the author through applying different narrative skills. Proper distance can help the reader develop psychological reflection during the reading process, then the reader can judge the work objectively and gets great pleasure from reading, and thus, the aesthetic effect is achieved. In The Adventures of Huckleberry Finn, Mark Twain controls the distance between Huck, the narrator and the reader; the distance between Huck, the unreliable narrator and Huck, the character successfully, which result in strong artistic effect.

Credible Online News？ Yes or No

Dissemination of information medium are no longer limited to newspapers, television and radio but is extending to the online news. The number of online news readers is rapidly increasing along with the popularity of the Internet. However, only sources that emphasizes the element of credibility will be accepted by the readers. This study was conducted to determine the credibility of online news; to identify the relationship between online news credibility and youth acceptance. Using a quantitative approach, a total of 400 youth selected to participate in the study out of the 68,000 population in Selangor. The data was analyzed using Statistical Package for Social Science （SPSS） version 21.0. This study shows that a group of young women were the common group who seek and read online information. Based on the findings too, online news in Malaysia are less credible. Although the online news is less credible, the results shows that youth read online news because the contents are current and up to date. Further, result of the Pearson＇s correlation test shows that the more credible elements available in online news, the more that medium is accepted by youth.

Design and Implementation of RFID Reader based on μC/OS System

This paper mainly completed the design of hardware and software of RFID to read write system. Including selection and easy transplantation of open source μC/OS-Ⅱ operating system, completed the transplant in the embedded module, the task to create work; Analyze the system software level and concrete structure from the hardware layer, driver layer, operating system layer and user layer; and analyzes the influence of the actual the power consumption of the system running in different modes and the read-write distance, the influence of moving speed of chip on read and write time.

Amazon Kindle for Teaching and Learning Chinese in China's Mainland

As a special milestone of reading revolution, Amazon Kindle has had great success in the market since 2010. This paper discusses its educational significance of teaching and learning Chinese based on a case study in some universities in China's Mainland, then analyzes its advantages and disadvantages comparing with not only the traditional reading media including paper-book, PC （Personal Computer）, mobile device, and others, but also some popular e-book readers such as Hanvon, Nook, or iBooks （iPad, iPod touch, and Macbook）, with especial interests on the compatibility of Chinese characters. Some important issues which comprise the resource, copyright, price, Chinesization, and interaction are discussed in the essay as well. Though it has not been widely accepted by the majority in China's Mainland, even less popular in the field of teaching Chinese, now it is worth paying attention. To catch up with the new technology tendency with its superiority, Amazon Kindle plays a more and more important role in teaching and learning Chinese and is changing the educational custom nowadays. A new look of paperless education prospect is to be anticipated in the consumption era.

丙烯酸-2,4,6-三硝基苯乙酯的合成及热分解

以TNT、甲醛为原料,在弱碱性条件下反应合成得到2,4,6-三硝基苯乙醇(PicCH2CH2OH);PicCH2CH2OH在浓硫酸催化下和丙烯酸在甲苯中回流反应24h,合成得到丙烯酸-2,4,6-三硝基苯乙酯,产率为62%。采用紫外可见光谱(UV-Vis)、核磁共振氢谱(1HNMR)、红外光谱(FTIR)、质谱(MS)以及元素分析等对产物结构进行了表征。利用热重分析(TG)对产物热稳定性进行了研究,采用Kissinger方法和Ozawa方法计算其热分解活化能Ea分别为99.78,102.96kJ·mol-1。

A two-layer optimization model for high-speed railway line planning

Line planning is the first important strategic element in the railway operation planning process,which will directly affect the successive planning to determine the efficiency of the whole railway system.A two-layer optimization model is proposed within a simulation framework to deal with the high-speed railway (HSR) line planning problem.In the model,the top layer aims at achieving an optimal stop-schedule set with the service frequencies,and is formulated as a nonlinear program,solved by genetic algorithm.The objective of top layer is tominimize the total operation cost and unserved passenger volume.Given a specific stop-schedule,the bottom layer focuses on weighted passenger flow assignment,formulated as a mixed integer program with the objective of maximizing the served passenger volume andminimizing the total travel time for all passengers.The case study on Taiwan HSR shows that the proposed two-layer model is better than the existing techniques.In addition,this model is also illustrated with the Beijing-Shanghai HSR in China.The result shows that the two-layer optimization model can reduce computation complexity and that an optimal set of stop-schedules can always be generated with less calculation time.