5,182 research outputs found
Xi yuan lu xiang yi: si juan, juan shou. v.1
No full text許槤編校.綫裝.框18.9x13.8公分, 分上下欄, 上欄註解18行14字, 下欄原文9行14字. 白口, 左右雙邊, 單黑魚尾. 版心上鐫題名, 中鐫卷次, 小題, 下鐫葉次. 眉端刻評.書名頁署"洗冤錄詳義, 光緖丙子秋九月泉唐葛氏嘯園開雕, 上虞徐三庚署".前有光緖二年[1876]葛元煦序, 言重刻此書事.卷四末刻"嘯園藏板", "上海新北門內謝潤卿鐫字"With: 洗冤錄摭遺 : 二卷 / 葛元煦.鈐"承業堂藏書印", "長□彭氏", "莊兆祥印"Xian zhuang.Kuang 18.9 x 13.8 gong fen, fen shang xia lan, shang lan zhu jie 18 hang 14 zi, xia lan yuan wen 9 hang 14 zi. Bai kou, zuo you shuang bian, dan hei yu wei. Ban xin shang juan ti ming, zhong juan juan ci, xiao ti, xia juan ye ci. Mei duan ke ping.Detailed notes in vernacular field only.Detailed notes in vernacular field only.Detailed notes in vernacular field only.Xu Lian bian jiao.With: Xi yuan lu zhi yi : er juan / Ge Yuanxu.Qian "Cheng ye tang cang shu yin", "Chang [...] Peng shi", "Zhuang Zhaoxiang yin
Alternative materials for next-generation transistors: high-k/Ge-based MOSFET
No full textElectronic devices that make up 99% of the computer processor and memory market are based on silicon (semiconductor) and silicon dioxide (insulator) technology. Unfortunately the key transistor gate stack structure within the "traditional" technology has reached an intrinsic physical scaling limit; the ultrathin gate oxide, already at 1nm thickness, cannot be made thinner without resulting in an intolerably high leakage current and reduced drive current. This limitation can be avoided by replacing the thin gate dielectric with a thicker film of an alternative material with a permittivity higher than that of SiO2, an accomplishing that has been realized in production just as this thesis goes to press. To further increase device performance, replacing the Si semiconductor with germanium as an alternative channel material is an attractive option for its high mobility and narrow band gap. However, the lack of a stable insulating oxide with high quality electrical properties prevents the fabrication of competitive Ge-based metal oxide semiconductor field effect transistors (MOSFETs).
This dissertation reports the study of potential future-generation transistors with high-k dielectrics (HfO2 and Al2O3) on Ge substrates. A brief review of current research and development is first given followed by an introduction of the thin film characterization techniques used in this work. Various cleaning treatments as well as surface passivation methods using wet chemistry have been investigated on Ge substrates. Next, thin high-k dielectric films of HfO2 and Al2O3 have been deposited on Ge using atomic layer deposition (ALD). ALD permits films to be grown with monolayer control and excellent film conformality.
Physical, chemical and electrical characterization has been performed on the multilayer film structures. Optimization of the film growth has been developed and we have demonstrated high quality with Au/HfO2/Ge nMOS devices. Capacitance-voltage electrical measurements show that sulfur passivation methods on Ge greatly decrease the interface state density and improve the device electrical properties. The same improvements have also been observed on the similarly processed Ge-based MOS capacitors with Al2O3 dielectric layers.Ph.D.Includes bibliographical references
Luzhou quan ji. v.1
No full text第1-8册 鹿洲初集 : 20卷 -- 第9-10册 鹿洲公案 : 2卷 -- 第11-12册 東征集 : 6卷 -- 第13-14册 修史試筆 : 2卷 -- 第15册 平臺紀略 -- 第15-16册 棉陽學準 : 5卷 -- 第17-18册 女學 : 6卷Detailed contents in vernacular field only.藍鼎元.Lan Dingyuan
HIGH PERFORMANCE LAN INTERNETWORK DESIGN.
No full textThe author discusses the requirements of a versatile LAN internetwork design, and proposes a high-performance, fault-tolerant internetwork architecture. The major design goal is to preserve an LAN's characteristics, such as high capacity, low queuing delay, packets in sequence, low error rate, etc. , in the LAN internetworking environment so that high performance is achievable. The new architecture can support both packet and fast circuit switching. It is efficient for various applications with a wide range of channel holding times.</p
Limits of 10 GE transmission using PC LAN adapters
No full textIn this contribution, we present experimental results on amplification of 10GE signále in the 1310nm wavelength range with respect to application of PC LAN adapters in metropolitan area networks
An Interactive Tool for Teaching and Learning LAN Design
No full textIt is often difficult to motivate students to learn local area network (LAN) design because many students appear to find the subject rather dry, technical and boring. To overcome this problem the author has developed a software tool (named LAN-Designer) that gives students an interactive learning experience in LAN design concepts. The LAN-Designer is suitable for classroom use in introductory computer networking courses. This chapter describes LAN-Designer and its effectiveness in teaching and learning LAN design. The effectiveness of LAN-designer has been evaluated both formally by students and informally in discussion within the teaching team. The feedback from students indicates that the development and implementation of LAN-Designer were successful. It also discusses the impact of LAN-Designer on student learning and comprehension.</jats:p
An Interactive Tool for Teaching and Learning LAN Design
No full textIt is often difficult to motivate students to learn local area network (LAN) design because many students appear to find the subject rather dry, technical and boring. To overcome this problem the author has developed a software tool (named LAN-Designer) that gives students an interactive learning experience in LAN design concepts. The LAN-Designer is suitable for classroom use in introductory computer networking courses. This chapter describes LAN-Designer and its effectiveness in teaching and learning LAN design. The effectiveness of LAN-designer has been evaluated both formally by students and informally in discussion within the teaching team. The feedback from students indicates that the development and implementation of LAN-Designer were successful. It also discusses the impact of LAN-Designer on student learning and comprehension. </jats:p
Handover on a Highway LAN
No full textHighway Local Area Networks (LANs) require small cell sizes in order to meet the demands for increased capacity which is induced by the large number of users in small areas. As smaller cells are deployed, the number of cell boundary crossings increases. Furthermore, the high velocities of the vehicles moving in a highway result in an increase in the frequency of cell boundary crossings. As a result, handover, defined as the mechanism that transfers an ongoing call from one cell to another as a user moves through the coverage area of the cellular system, will play a very important role in the design and the performance of the highway LAN. This report presents a general overview of handover mechanisms and proposes ways of applying handover on a highway LAN according to the network’s specific characteristics. In order to implement handover in a highway LAN, the modelling of the vehicle distribution and the radiowave propagation effects have been analyzed: The shifted negative exponential distribution can model both the spacing between the vehicles and the distance between the antenna of the base station and the nearest vehicle. The propagation environment is characterized by the path-loss attenuation, the Rice fading and the oxygen absorption (which has been ignored for the needs of this report). The phenomenon of shadowing has been neglected. A general overview of the handover mechanism, i.e. the goals of the handover procedure, performance metrics commonly used to evaluate handover algorithms, and the stages which constitute the procedure of handover, is presented. Handover mechanisms as applied in GSM and DECT have been investigated as examples of applied handover techniques. The issue of handover has not been addressed in the IEEE 802.11 and the HIPERLAN standards. Specific aspects of handover implied by the characteristics of the highway LAN have been examined. The propagation environment of a highway’s cell of 200 m. has been simulated using an exponential smoothing process. The averaging process has provided considerably accurate results and the crossover point can be adequately approximated. An absolute signal strength with velocity adjustable threshold algorithm is recommended for the handover decision procedure. The threshold levels are dynamically adjusted according to the velocity of each vehicle, that is, the higher the velocity of the vehicle is, the higher is the threshold value set. The Signal Prediction Priority Queuing (SPPQ) method is analyzed and proposed, in order to provide the optimum order in the execution of the handovers. A multicast-based handover scheme, known as sub-group buffering scheme, can be adopted in order to accomplish seamless communication service. Any numerical results obtained can not be used for the precise calculation of the parameters involved in the handover procedure, due to various arbitrary assumptions and simplifications. The propagation model still needs to be verified through actual measurements. However, the basic aspects of the handover mechanism have been extensively presented and the various approaches and proposed schemes could form the basis of the handover procedure to be implemented on a highway LAN.Electrical Engineering, Mathematics and Computer ScienceTelecommunicatie- en Verkeersbegeleidingssysteme
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