34 research outputs found

    Structure design optimization and fabrication of infrared microbolometer

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    红外探测器是应用于热成像的主要探测技术,在国防、航天领域具有重要的战略意义。作为当今非制冷热成像的主流技术,氧化钒(VOx)微测辐射热计焦平面成像阵列具有重量轻、成本低,且符合单兵作战装备要求等优点,成为世界各国许多商业机构和研究单位竞相开发的目标。但是,焦平面阵列制备涉及集成电路设计、红外光学、薄膜生长、MEMS工艺等众多技术,是一项复杂的系统工程。 本文针对红外微测辐射热计器件结构优化设计、薄膜生长以及器件制备工艺进行研究,成功地制备出具有微桥结构的、热敏材料为VOx的微测辐射热计像元,桥面为SiNx/VOx/SiNx三明治结构,由被SiO2包裹的AL微柱所支撑。器件具有红外响应特性。本...Thermal imaging is one of the major detecting technologies used in national security that plays an important role in the domains of national defence and spaceflight. Among all kinds of thermal imaging technologies, uncooled focal plane array (UFPA) using vanadium dioxide as the thermal sensing material has become a hotspot due to its high performance, light weight and low cost. Whereas, the fabric...学位:理学硕士院系专业:物理与机电工程学院物理学系_凝聚态物理学号:2005130164

    Structure design optimization and fabrication of infrared microbolometer

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    红外探测器是应用于热成像的主要探测技术,在国防、航天领域具有重要的战略意义。作为当今非制冷热成像的主流技术,氧化钒(VOx)微测辐射热计焦平面成像阵列具有重量轻、成本低,且符合单兵作战装备要求等优点,成为世界各国许多商业机构和研究单位竞相开发的目标。但是,焦平面阵列制备涉及集成电路设计、红外光学、薄膜生长、MEMS工艺等众多技术,是一项复杂的系统工程。 本文针对红外微测辐射热计器件结构优化设计、薄膜生长以及器件制备工艺进行研究,成功地制备出具有微桥结构的、热敏材料为VOx的微测辐射热计像元,桥面为SiNx/VOx/SiNx三明治结构,由被SiO2包裹的AL微柱所支撑。器件具有红外响应特性。本...Thermal imaging is one of the major detecting technologies used in national security that plays an important role in the domains of national defence and spaceflight. Among all kinds of thermal imaging technologies, uncooled focal plane array (UFPA) using vanadium dioxide as the thermal sensing material has become a hotspot due to its high performance, light weight and low cost. Whereas, the fabric...学位:理学硕士院系专业:物理与机电工程学院物理学系_凝聚态物理学号:2005130164

    Applied research on SiO_2 deposited by PECVD

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    研究了PECVD腔内压力、淀积温度和淀积时间等工艺条件对SiO2薄膜的结构、淀积速率和抗腐蚀性等性能的影响。结果表明,利用剥离工艺,并采用AZ5214E光刻胶作为剥离掩模成功制作了约2μm厚的包裹在金属铝柱周围的SiO2隔热掩模。The silicon oxide thin films are deposited on Silicon substrate by PECVD.The influence of the process parameters such as temperature, reactant and time on the quality,deposited rate and etchant-resistant characteristics of the silicon oxide thin films are discussed.The experimental result indicates that 2μm-thick silicon oxide adiabatic films can be prepared successfully by using lift-off technology with AZ5214E photoresist lift-off mask,which is wrapped around the aluminum pillar

    Agonistic Behavior of Foraging Hemidactylus frenatus: An Analysis Based on Resource Defense Theory

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    敵對行為(Agonistic behavior)是動物常用於競爭資源的手段,資源防禦理論(Resource defense theory)指出動物展現的攻擊性(Aggressiveness)可能會隨著競爭者數量及資源量的增加而上升、下降或呈現先升後降的變化。疣尾蝎虎(Hemidactylus frenatus)常於夜間聚集捕食牆上趨光的昆蟲,個體之間偶有敵對互動。牠們的種內攻擊性在過往文獻陳述中多有分歧,其是否受競爭者、食物量等因子影響也仍待釐清。本研究透過室內操弄實驗檢視兩個變級的競爭者數量及三個變級的食物量相互組合下疣尾蝎虎展現的敵對行為。結果顯示,疣尾蝎虎在競爭者較多的情況下展現的攻擊性大致較低,包括長距離敵對互動比例較低、碰面發生敵對的比例較低、達中強度敵對行為的比例較低,以及互動時間較短;但同時優勢個體卻會展現更高比例的高強度敵對行為。優勢個體展現高強度敵對行為的比例同時受食物量影響,隨食物增加略呈先升後降的變化;而當非優勢個體碰面時,互動時間亦隨食物量呈先升後降的變化。本研究證實了競爭者數量及食物量皆對疣尾蝎虎覓食時的種內敵對行為有多層面的影響,也進一步發現群內的社會地位會影響這些行為反應,提供了資源防禦理論應用於在爬蟲類行為研究的罕例。Agonistic behavior is commonly adopted by animals for competing resources. Resource defense theory points out that the aggressiveness of animals is affected by competitor numbers and resource value. As these factors increase, the aggressiveness might increases, decreases, or has a quadratic change. Individuals of Hemidactylus frenatus often aggregate around the lights and compete on insect prey. Results of previous studies on the intraspecific aggressiveness of this species were contradictory, and whether its aggressiveness is affected by abovementioned factors is also unknown. An indoor experiment, manipulating 2 levels of competitor numbers and 3 levels of food abundance, were thus conducted to clarify their effects on the aggressiveness of foraging H. frenatus. The results indicated that the aggressiveness was generally lower when there were more competitors, i.e., lower long-distance agonistic ratio, overall hostility ratio, median intensity ratio, and interaction time. However, dominant geckos tended to show a higher ratio of high intensity behavior at the same time. This ratio was also affected by food abundance and showed a quadratic response along with the increasing food abundance. A quadratic response was also found in the interaction time of encounters between subordinates. The study confirmed that both competitor numbers and food abundance have effects but may act differently on intraspecific agonistic behavior of H. frenatus, and the importance of social status was also revealed. This study provides a rare example of applying resource defense theory on agonistic interaction of reptiles.Verification from the committee…………………………i Acknowledgement…………………………………………………………………ii Chinese abstract……………………………………………………………iii English abstract………………………………………………………………iv Introduction……………………………………………………………………………1 Material and methods………………………………………………………5 Study animal……………………………………………………………………………5 Experimental setup……………………………………………………………5 Experimental design…………………………………………………………7 Experimental procedure…………………………………………………7 Data collection……………………………………………………………………9 Data analysis………………………………………………………………………10 Results………………………………………………………………………………………14 Encounter outcomes and social status…………14 Main effects and the interaction effect of the factors………………………………………………………………………………………15 Food abundance effects in “dominant-involved dyadic” and “subordinate-only dyadic” encounters………………………………………………………………………………16 Discussion………………………………………………………………………………18 References………………………………………………………………………………2

    慢性病、身體功能與生活型態對台灣中老年人健康改變的影響

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    [[abstract]]本研究主要目的是探討台灣地區中老年人慢性病、身體功能和生活型態對其健康改變的影響。研究資料取自於「台灣地區中老年人保健與居住狀況調查」,將1999年所收集2,130位53歲(含)以上的受訪者資料,與2003年相同受訪者的健康紀錄,以機率(probit)模型分男、女性作實證分析。實證結果顯示,在其他外生變數固定下,年紀較輕或是教育程度較高的中老年人較能維持好健康。此外,假設不考慮其他變項,本研究更提出:中風在所有慢性病中對男女性的健康影響最大。身體功能限制也同時對男女性產生顯著且負面的影響。另外,在生活型態方面,本實證結論亦發現:抽煙對男性健康沒有顯著的影響,但卻會使女性健康狀況顯著的變差;規律的運動,對男女性健康的改變都有顯著且正面的功能。故本研究結果支持慢性病、身體功能和生活型態,對中老年人在不同時期健康的改變呈現顯著的影響;此結論將有助於規劃未來在協助中老年人疾病及生活型態照顧等各項措施時的依據。[[abstract]]The purpose of this study was to examine the influence of chronic disease, physical function, and lifestyle on health transitions among the middle-aged and older persons in Taiwan. A longitudinal design was applied to investigate whether chronic disease, physical function, and lifestyle were associated significantly with health transition in this population. Data on participants were obtained from the Survey of Health and Living Status of the Middle Aged and Elderly in Taiwan, a study initially conducted in 1999 that encompassed observations on 2,130 individuals 53 years and older. Data were collected again in 2003 to capture the health transition. A binary probit model was used to determine relationships between health transition and sociodemographic factors, chronic disease, physical functional ability, and lifestyle conditions by gender. Principal empirical results confirmed that, after controlling for potentially confounding variables, those participants who were relatively younger and had higher education levels were more likely to maintain good health during the study period (1999Y2003) for both men and women. In addition, when other factors were excluded, this article identified stroke as the ailment most strongly associated with continuing good health. Similarly, activities of daily living and instrumental activities of daily living demonstrated significant and negative effects on continuing good health regardless of gender. However, lifestyle rendered interesting and plausible findings. Smoking showed a significant influence on health transition for women but an insignificant influence on such for men. Regular exercise showed significance for both men and women. Findings suggest that chronic disease, physical functional ability, and lifestyle variables have strong and significant influences on health transition for the middle-aged and older persons. Research results should be useful in developing strategies that target disease care services and lifestyles

    A Study of Feeds Prices in Taiwan

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    1.分析飼料玉米、黃豆進口量與進口價格之不穩定性分析,其變動幅度與波動規則性。2.分析王米、黃豆進口市場與飼料市場競爭情況,包括廠商數目。3.分析玉米、黃豆粉市場每月供給量包括進口量與庫存與國內需求量間之關係。4.影響玉米、黃豆粉進口價格之市場因素,包括國際市場供需,國內季節性,船期等因素。5.分析飼料成本中,飼料玉米、黃豆粉、魚粉等直接材料費用所佔比率及長期變動趨勢。6.分析飼料成本中工資、設備、折舊、維修費、營運水電等管銷成本所佔比率及長期變動趨勢。7.擬定毛豬、肉雞與蛋雞飼料定價模式。1.To analyze the stability and variety of the import quantities and prices of feeds corn and soybean.2.To analyze the competition of corn, soybean import markets and feeds markets includeing the number of firms.3.To analyze the supply quantities per month including the relationship of the import quantities, stock and dometic demand.4.To analyze the effects of supply and demand in international markets, domestic season and shipping schedules on import prices of corn and soybean powder.5.To analyze the ratio and long term trend of feeds corn soybean powder in direct cost.6.To analyze the ratio and long term trend of wage, equipment, depreciation maintenance water and electricity in management and sale cost.7.To Determine the pricing model of hog, broiler and layer

    基于物体的编码方法中的多物体速率控制

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    多粒子体系的相对论Glauber展开式

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    多粒子体系的相对论Glauber展开式

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