Browsing by Issue Date, starting with "2003-03-11"

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在解碼錯誤訂正碼時用以計算徵兆多項式之方法
(2003-03-11)
李鎮宜
;
張錫嘉
;
林建青
本發明係提供一種在解碼錯誤訂正碼時用以計算徵兆多項式之方法，其係利用徵兆值與錯誤定位器多項式係數之關係可以推論出當前t個徵兆值為零時表示後t個徵兆值亦為零，其中t為最大可更正錯誤數目。對所有接收字碼計算出前t個徵兆值；之後再判斷該前t個徵兆值是否為零，若該前t個徵兆值為零，則停止計算，否則繼續計算後t個徵兆值。因此，本發明只需一半徵兆值之運算量即可判斷接收字碼是否發生錯誤，故可有效降低實際運作上的運算量，並達到低消耗功率之目的。
Growth and transport properties of (110)-oriented La2/3Sr1/3MnO3 thin films on TiO2-Buffered Si (100) substrates
(2003-03-15)
Liu, SJ
;
Chen, SF
;
Juang, JY
;
Lin, JY
;
Wu, KH
The growth and transport properties of (110)-oriented La2/3Sr1/3MnO3 thin films on TiO2-buffered silicon substrates by pulsed-laser deposition are reported. An insulator-metal transition associated with a ferromagnetic transition was observed at about 360 K. Magnetic measurements showed that in-plane coercive fields are about 60 Oe and 300 Oe at 300 K and 5 K, respectively. A magnetoresistance with a Deltarho/rho(H = 0) ratio of -20% in a magnetic field of 5 T was observed not only near the insulator-metal transition temperature but also below 30 K. Moreover, a T-2- to T-3-dependence crossover of resistivity was observed around 60 K, indicating that an unconventional one-magnon scattering may have occurred.
Development of a rapid one-step immunochromatographic assay for detecting White Spot Syndrome Virus (WSSV) in shrimps
(2003-03-17)
Ko, LE
;
Ko, YC
;
Mao, SST
;
Tseng, GT
;
生物科技學系
Purification of human plasma haptoglobin using hemoglobin-affinity column chromatography
(2003-03-17)
Mao, SJT
;
Liao, CY
;
生物科技學系
;
Department of Biological Science and Technology
Epidemiology of haptoglobin phenotypes in chronic diseases
(2003-03-17)
Cheng, TM
;
Pan, JP
;
Wang, JS
;
Mao, SJT
;
生物科技學系
beta-Lactoglobulin is a sensitive thermal maker in dry milk as identified by monoclonal antibody approach
(2003-03-17)
Chen, WL
;
Huang, MT
;
Liu, HC
;
Li, CW
;
Mao, SJT
Aquifer parameter identification using the extended Kalman filter
(2003-03-19)
Leng, CH
;
Yeh, HD
;
環境工程研究所
;
Institute of Environmental Engineering
[1] An approach using the extended Kalman filter (EKF) and cubic spline is proposed to identify the aquifer parameters in both confined and unconfined aquifer systems. The cubic spline applied to the observation data can generate interpolated data with uniform time intervals and facilitates the implementation of EKF. The EKF combined with the Theis solution or Neuman's model, using the interpolated drawdown data produced by cubic spline, can optimally determine the parameters through the recursive process. The proposed approach can quickly identify the parameters, using only part of observed drawdown data, and the obtained parameters are shown to have good accuracy. Thus length of time of pumping tests may be shortened. Comparisons of results from nonlinear least squares combined with finite difference Newton's method (NLN) and EKF show that the EKF allows a wider range of initial guess values than NLN and have the accuracy of the results on the same order of magnitude as that of NLN. When determining the aquifer parameters, the identification process of specific yield reflects the effect of gravity drainage on the drawdown curve and conforms to the physical nature of an unconfined aquifer. Furthermore, this study shows that EKF can be successfully applied to analyze the drawdown data even with white noises or temporally correlated noises.
Establishment and application of a fluorescent polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method for identifying porcine, caprine, and bovine meats
(2003-03-26)
Sun, YL
;
Lin, CS
;
生物科技學系
;
Department of Biological Science and Technology
A method of fluorescent Polymerase Chain Reaction-restriction fragment length polymorphism (PCR-RFLP) was applied as an analytical and quantitative tool for meat identification. Following alignments of the nucleotide sequences, an oligonucleotide primer pair was designed to amplify the partial sequences within the 12S ribosomal RNA (12S rRNA) gene of mitochondrial DNA from porcine, caprine, and bovine meats. No fragment can be amplified from dog, cat, fish, duck, goose, turkey, and chicken DNA with the primer pair. Using fluorescence sensor capillary electrophoresis, the species-specific DNA fingerprints of pork, goat, and beef were generated by restriction enzyme digestion following a fluorescence-labeling PCR amplification. Species identification was conducted on the meat mixtures. The reliably semiquantitative levels were below 1% for binary mixtures of pork, goat, and beef. Cooking and autoclaving of meats did not influence the generation of the PCR-RFLP profiles or the analytical accuracy.
一個人的書法青篛笠,綠蓑衣,斜風細雨不需歸(張志和,漁父)
(2003-03-28)
管管
A novel soft-program for a narrow erased state Vt distribution, read disturbance suppression and over-program annihilation in multilevel cell flash memories
(2003-04-01)
Yeh, CC
;
Fan, TH
;
Lu, TC
;
Wang, TH
;
Pan, S
In floating gate flash memories, anode hot hole injection induced by the channel FN erase will result in tunnel oxide, degradation, severe read disturbance and an abnormally fast program. All of these issues are critical for multilevel cell (MLC) flash memory design, which requires precise threshold voltage placement, good data retentivity and programming controllability. In this paper, a novel soft-program scheme is proposed to narrow the threshold voltage distribution in the first level. Cycling-induced read disturbance and programming inaccuracy are also reduced. This technique is essential for the application of more-than-2-bit MLC, flash memories.
Novel vertical polysilicon thin-film transistor with excimer-laser annealing
(2003-04-01)
Lee, MZ
;
Lee, CL
;
Lei, TF
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
In this paper, we propose a novel self-alignment vertical thin-film transistor (VTFT) structure with excimer laser annealing (ELA). The ELA on source and drain decreases the process temperature, suppresses the lateral diffusion of dopants in short channel devices and increases the driving current. Furthermore, the VTFTs have high carrier mobility, compared to conventional polysilicon thin film transistors (TFTs).
A reliable procedure for testing linear regulators with one-sided specification limits based on multiple samples
(2003-04-01)
Pearn, WL
;
Lin, GH
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
Process capability indices C-PU and C-PL are developed in the manufacturing industry to provide quantitative measures on process potential and performance. for processes with one-sided specification limits. Statistical properties of the estimators of C-PU and C-PL have been investigated extensively, but only restricted to cases with single samples. In this paper, we consider the estimation and capability testing of C-PU and C-PL based on multiple samples. We show that the proposed estimator of C-PU and C-PL are indeed the uniformly minimum variance unbiased estimators (UMVUEs). A simple procedure based on a hypothesis testing using the UMVUE is developed for the practitioners to use for judging whether a stable process meets the preset capability requirement. (C) 2002 Elsevier Science Ltd. All rights reserved.
Watermarking approach to embedded signature-based authentication by channel statistics
(2003-04-01)
Yang, ZF
;
Tsai, WH
;
資訊工程學系
;
Department of Computer Science
Embedded signature-based authentication is a highly promising watermarking method for solving high-level authentication problems. This work proposes such a watermarking approach using channel statistics evaluated from a reference watermark. The basic concept is to consider the problem to be an example of communications with side information, which is the reference watermark embedded in the host with the signature at the sender site. At the receiver site, the reference watermark is first extracted to determine channel statistics, which are used to generate information about signature reliability. Three kinds of information are derived, including a reliability measure, an entropy measure, and an authenticated signature. Experimental results establish that the measures of reliability and uncertainty are meaningful, and that the embedded signature can survive high-quality JPEG compression and manipulations such as negation, cropping, replacement, and modification. (C) 2003 Society of Photo-Optical Instrumentation Engineers.
Brownian dynamics simulations of the effects of hydrodynamic interactions on the polymer viscoelastic behavior
(2003-04-01)
Yang, DJ
;
Lin, YH
;
應用化學系
;
Department of Applied Chemistry
Brownian dynamics simulation is used to investigate the viscoelastic response of the Gaussian chain to a step shear deformation in both the linear and non-linear regions under the influence of hydrodynamic interactions. Both the preaveraged Oseen tensor and the Rotne-Prager tensor are used in the study. In the former case, the simulation results are shown to be in agreement with the expected results calculated using the eigenvalues of the normal modes of motion obtained numerically. It is shown that an initial state with zero second normal-stress difference is generated by the step shear deformation. The subsequent rise of the second normal-stress difference as revealed by the simulation is shown mainly arising from the coupling of the recoil of the stretched bond in the direction of deformation and the anisotropy in the hydrodynamic interaction created by the step deformation. (C) 2003 Elsevier Science Ltd. All rights reserved.
Thermal properties and hydrogen bonding in polymer blend of polybenzoxazine/poly(N-vinyl-2-pyrrolidone)
(2003-04-01)
Su, YC
;
Kuo, SW
;
Yei, DR
;
Xu, HY
;
Chang, FC
The thermal properties and hydrogen bonding behavior of B-a type polybenzoxazine (PBZZ)/PVP blends were investigated by DSC and FIFIR. The DSC result shows a single T-g over the entire compositions and a large positive deviation based on Kwei equation was observed in the T-g versus composition diagram, implying that strong hydrogen bonding interaction exists between PBZZ and PVP segments. The strength of hydrogen bonding interaction is in the order of inter-association between the hydroxyl group of PBZZ and the carbonyl group of PVP (K-A = 594 L mol(-1)) > self-association between the hydroxyl group of pure PBZZ (K-B = 72.6 L mol(-1)) > inter-association between the hydroxyl and the Mannich-based bridge of pure PBZZ (K-C < 10 L mol(-1)). Good correlation between DSC and FIFIR analysis were observed. (C) 2003 Elsevier Science Ltd. All rights reserved.
Device characteristics of polysilicon thin-film transistors fabricated by electroless plating Ni-induced crystallization of amorphous Si
(2003-04-01)
Chao, CW
;
Wu, YCS
;
Hu, GR
;
Feng, MS
;
材料科學與工程學系
Compared with conventional solid phase crystallized (SPC) thin-film transistors (TFTs), metal-induced laterally crystallized (MILL) TFTs exhibit significantly enhanced performance. Metal films are usually deposited by the physical vapor deposition (PVD) method, which is time-consuming and expensive in terms of equipment cost. In this work, a simpler electroless plating Ni was introduced to replace PVD Ni. It was found that the morphologies and the device characteristics of Ni-induced lateral crystallization TFT were as good as those of PVD Ni-induced lateral crystallization TFT.
A low-power design for Reed-Solomon decoders
(2003-04-01)
Chang, HC
;
Lee, CY
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
In this paper, a low-power design for the Reed-Solomon (RS) decoder is presented. Our approach includes a novel two-stage syndrome calculator that reduces the syndrome computations by one-half, a modified Berlekamp-Massey algorithm in the key equation solver and a terminated mechanism in the Chien search circuit. The test chip for (255,239) and (208,192) RS decoders are implemented by 0.25 mum CMOS 1P5M and 0.35 mum CMOS SPQM standard cells, respectively. Simulation results show our approach can work successfully and achieved large reduction of power consumption on the average.
A fuzzy data mining algorithm for finding sequential patterns
(2003-04-01)
Hu, YC
;
Chen, RS
;
Tzeng, GH
;
Shieh, JH
;
科技管理研究所
Since fuzzy knowledge representation can facilitate interaction between an expert system and its users, the effective construction of a fuzzy knowledge base is important. Fuzzy sequential patterns described by natural language are one type of fuzzy knowledge representation, and can thus be helpful in building a prototype fuzzy knowledge base. We define that a fuzzy sequence is an ordered fist of frequent fuzzy grids, and the length of a fuzzy sequence is the number of frequent fuzzy grids in the frequent fuzzy sequence. Frequent fuzzy grids and frequent fuzzy sequences can be determined by comparing individual fuzzy supports with the user-specified minimum fuzzy support. A fuzzy sequential pattern is just a frequent fuzzy sequence, but it is not contained in any other frequent fuzzy sequence. In this paper, an effective algorithm called the Fuzzy Grids Based Sequential Patterns Mining Algorithm (FGBSPMA) is proposed to generate fuzzy sequential patterns. A numerical example is used to show an analysis of the user visit to websites, demonstrating the usefulness of the proposed algorithm.
A unifying framework for intelligent DNS management
(2003-04-01)
Chen, CS
;
Tseng, SS
;
Liu, CL
;
資訊技術服務中心
;
Information Technology Services Center
The Domain Name System (DNS) is a special kind of distributed directory service for people to create and access the network information systems by (1) allowing local control of its segments and (2) making each segment's data available on the Internet using a client-server scheme. However, few administrators have the expertise to do the jobs well since this distributed mechanism is a double-edged sword; it allows DNS not only to scale to Internet size but also allows for incredible mis-configurations. The presented study is an analysis of what problems and difficulties most DNS administrators might encounter and provides the insights into how various DNS assistant sub-systems could be designed and deployed to solve the complex problems or alleviate these DNS administration job loadings. Ontologies become an important mechanism to build information systems. The role of ontologies is to capture domain knowledge and provide a commonly agreed upon understanding of a domain. The advantages include the sharing and re-use of knowledge, and the better engineering of knowledge-based systems with respect to acquisition, verification and maintenance. In this paper, we propose a unifying framework (e.g. including configuration, outstanding traffic monitoring and analysis, planning and management, tutoring, etc.) for supporting intelligent DNS management using web interface and expert system technology to help inexperienced administrators in insuring the smooth operation of their DNS systems. To help extract knowledge, we propose an efficient DNS Ontology Construction Algorithm to fast conceptualize DNS domain knowledge through a hybrid method of brainstorming and use cases modeling. While some sub-systems are still under development, others have been prototyped and deployed for everyday use. As our experience with a first simple prototype has shown, the paradigm of using DNS ontology to build a unifying framework for intelligent DNS management works good and effective. It is supposed that all these might become an integral part of the DNS administration activities of an organization in the near future. (C) 2003 Elsevier Science Ltd. All rights reserved.
Asymptotic behaviors in a transiently chaotic neural network
(2003-04-01)
Chen, SS
;
Shih, CW
;
應用數學系
;
Department of Applied Mathematics
We are interested in the asymptotic behaviors of a discrete-time neural network. This network admits transiently chaotic behaviors which provide global searching ability in solving combinatorial optimization problems. As the system evolves, the variables corresponding to temperature in the annealing process decrease, and the chaotic behaviors vanish. We shall find sufficient conditions under which evolutions for the system converge to a fixed point of the system. Attracting sets and uniqueness of fixed point for the system are also addressed. Moreover, we extend the theory to the neural networks with cycle-symmetric coupling weights and other output functions. An application of this annealing process in solving travelling salesman problems is illustrated.