For the first time, a comprehensive study of Vanadium oxide-based selector characteristics with a universal model observed by thermal and electrical induced threshold switching (TS) phenomena at ...interface is presented in this work. The model can explain that the resistance evolution by thermal temperature in TS behaviors, as well as the resistance gradually increases with cycling ("seasoning effect"). Compatible current density (10 7 ~10 9 A/cm 2 ) and selectivity (~100) with physical understanding of evolution in energy barrier and MIT metallic state modulation are studied. The results show a promising design guideline for future storage-class memory (SCM) applications.
In a series system, the system fails if any of the components fails. When the system functions, there may exist correlation among components because they are connected within the same system. In this ...paper, we consider the reliability analysis of Type-I censored life tests of series systems composed of two components with bivariate log-normal lifetime distribution. The major interest is the inference on the mean lifetimes, and the reliability functions of the system as well as components. It is interesting to discover that conventional statistical inference based on the model parameters may yield unreliable results, especially through the maximum likelihood method. Alternatively, we apply the Bayesian approach focused on the likelihood function of the the mean lifetimes after reparametrization. The results are shown to be more promising via simulation study.
碩士
南台科技大學
電機工程系
96
It is an important issue to master the characteristics of wind speed distribution exactly during estimating the wind energy. Season and weather conditions of different terrain near ...by the wind field affect the characteristics of wind speed distribution. To evaluate the goodness of fit of Tainan/Penghu’ wind speed distribution, Statistical inference was used to conduct four different probability density functions in the thesis. There are significant differences between the characteristics of wind speed distribution in the terrain of Tainan and Penghu, The Weibull distribution is not always feasible all the time. During some specific months/seasons, the Gauss or Lognormal probability density function shows more significant identification. The moment and the maximum likelihood methods are used to estimate the shape and scale parameters of probability density function. Results show a better accuracy is conducted by the maximum likelihood method.
The statistical characteristics of wind speed are
碩士
龍華科技大學
企業管理系碩士班
104
With increasing scarcity of resources and elevating costs for waste disposal, the focus of waste disposal process has been shifted from “treatment at the end” to “reduction at ...the source” and recycling resources efficiently by reusing.
In general, the so-called recycling and renewal of resources indicates the process where secondary raw material and energy can be reacquired from wastes generated by consumers and manufacturers. Such recycling and reusing not only achieves waste reduction, but also slows down the depletion of primary resources by means of reusing secondary resources.
Statistics shows that, in Taiwan, municipal waste contains 40% of reusable resources, many of which are valuables such as metal, plastic, paper and glass, etc. To make use of such resources more efficiently and to apply for grants from Recycling Fund Management Board of Environmental Protection Administration, Executive Yuan, all recyclable resources should be separated in an itemized manner. Therefore, some
碩士
國立臺南大學
數位學習科技學系數位學習科技碩士在職專班
104
For the past few years, there has been a trend of the grassroots designed curriculum—“School-Based Curriculum”—in domestic education sector. The curriculum aims at ...solving the spectacular problem of each school by designing the program according to the distinguished features, the demands and the criteria of each school. It has combined with the expectations of the parents, the specialties of the teachers, and the needs of the students. However, by using the picture books to reveal the text contents with insufficient complements turn out to result in low willingness to learning and low efficiency to teaching. Consequently, the researchers discover that digital learning may be a more efficient way than the traditional teaching can be. The study aims to investigate how fast and how prominent the mobile device can affect the further learning of the students (4th grade students of elementary school) by using it anywhere and anytime with field study and the analyzation of “Local K
博士
國立交通大學
電子工程系所
93
Although the dimension of device has shrunk into nano technology node, the RC delay of inter-metal interconnection has still been the urgent issue needed to be resolved so far. In ...order to overcome this problem, the introduction of low-dielectric-constant (low-k) material for inter-metal interconnection can effectively reduce the RC delay. However, it is necessary to estimate the compatibility of low-k materials on semiconductor process during the integration of Cu and low-k materials. In this dissertation, four types of low-k materials are investigated: Methylsilsesquiazane (MSZ), Porous Polysilazane (PPSZ), Hydrogen Silsesquioxane (HSQ), and Porous Organosilicate Glass (POSG).
In the traditional lithography process for integrated circuit manufacture, photoresist removal step is an inevitable process. O2 plasma ashing is the main method to remove the photoresist during photoresist (PR) stripping process. It was found that the oxygen plasma will degrade the dielectric properties of low-k m
碩士
中華大學
機械工程學系碩士在職專班
101
Springs are one kind of mechanic parts. They play the essential roles in the wide scope of devices including the daily appliances, transportation vehicles, and precision ...machines. Because the fields and purposes of spring applications are very different and also their influence factors of design and manufacturing are numerous. Conventionally, spring design is rather dependent on designer experience and subjective judgment. The design expending is concerned since that many costly trial efforts on time and effort are required. Thus, satisfactory quality of final design outcome cannot be assured. The helical spring is the most wide applied and essential kind of springs. Therefore, in this thesis an approach to the design execution of helical springs is proposed basing on the computer aided method. At first, the much principal theories of helical springs are explained which include geometry and dimensions, spring stress analysis, spring rate, safety and design principles of the static and
碩士
國立臺南大學
綠色能源科技研究所碩士班
98
The purpose of this thesis is to design, fabrication, and testing a prototype of a PEM fuel cell co-generator with high-quality electricity and hot water. The first is to ...build the subsystems of the fuel cell co-generator, temperature control subsystem. Then, a microcontroller of the co-generator is developed and integration of the fuel cell co-generator is completed. Meanwhile, optimal control strategies for operation of the co-generator are proposed. Finally, parametric studies on the dynamic behaviors and efficiencies of the co-generator are presented, including office electricity use, The effects on operating temperature, secondary fluid, and tank capacity. Results showed that, For the effects on the operating temperature, the maximum efficiency of electricity generation, heat recovery efficiency, and combined heat and power efficiency are up to 32%, 43%, and 67%, For the effects on operation secondary fluid flow, the maximum efficiency of electricity generation, heat recovery ef
碩士
崑山科技大學
企業管理研究所
103
In Taiwan, compared to other industries, the output value of the powder coating related industries, including powder paint and powder coating industries, is not great. However, ...the products in our life, such as aluminum windows and doors, furniture, sports equipment、OA desk cabinets, and other machine equipment etc., all need powder coating. Nowadays, powder coating particularly focuses on function and weather ability. Its future development will emphasize on multifunctional coatings and special coating process. Plus with environmental protection and energy-saving features, the added value of powder coated products will be greatly enhanced. Quality of the powder coating plays critical role in the value-added process. Therefore, this study focuses on exploring the implementation of ISO 9001 quality management standards in the powder coating related industries of Taiwan. The study also attempts to understand the impact the implementation of ISO 9001 standards on operational performance of
碩士
國立清華大學
電子工程研究所
88
As the ULSI circuits are scaled down, the linewidth and spacings between metal interconnect also are made smaller, transmission delay is primarily caused by the parasitic ...resistance and capacitance(RC) along the metallic lines. There are two principle methods of reducing the transmission delay. The first method is to replace the aluminum wires with copper interconnects which offer lower resistivity and high resistance to electromigration. The second method is to use a lower dielectric constant material as the inter-metal dielectric. In addition, owing to the severe depth of focus(DOF) budget in deep sub-micron lithography, chemical mechanical polishing(CMP) is the only enabling technique known to achieve global planarization. For this reason, the characteristics of low dielectric constant material after chemical mechanical polishing(CMP) process must be researched in the future. In this thesis, one of the most promising low-k materials, hydrogen silsesquioxane (HSQ) from Dow Corning Inc.,
