31 research outputs found

    The design of embedded multimedia-player and the analysis of low power consumption

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    随着计算机技术和多媒体技术的不断发展和普及,多媒体播放器产品得到越来越多的青睐。多媒体播放器的主流解决方案有嵌入式和基于传统PC两种。嵌入式解决方案相比较传统的PC方案在可靠性、性价比、可扩展性等方面具有相对优势,成为当前多媒体播放器的首选解决方案。但是,目前已经推出的嵌入式多媒体播放器解决方案,在系统整体设计、功耗和特色功能实现等方面都存在若干问题,还需进行精细设计并妥善解决,才能成熟稳定,进行批量生产。本文针对车载广告媒体播放器的市场需求特点,设计并实现了一套嵌入式多媒体播放器的原型系统,在总体结构、功耗管理、特色功能等方面进行了较为深入的研究,提出并实现了适当的解决方案。现场测试结果表明...As computer and multimedia techniques develop and popularize rapidly, a series of multimedia-player products are more favorable. Nowadays prevalent multimedia-player solutions could be divided into two categories: embedded solutions and traditional PC solutions. The embedded solutions are inclined to be preferred because they are more reliable and extendable in comparison to the traditional PC sol...学位:工学硕士院系专业:计算机与信息工程学院计算机科学系_计算机应用技术学号:20022804

    Type system in programming language Gödel

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    中文摘要:Gödel 语言是一种说明性逻辑程序设计语言。该语言基于一阶逻辑,引入了一个多态多类的类型系统和多种 新的语言成分,支持抽象数据类型和模块化程序设计等技术,语言本身也具有很强的说明性语义。详细介绍了Gödel 语言的类型系统及其构造,对在逻辑程序设计语言中引入类型系统的作用进行了一些深入的分析和讨论。 英文摘要:Gödel is a declarative logic programming language. It is based on first order logic with a polymorphic many-sorted type system. Having a strong declarative semantic Gödel can be used to realize abstract data types and programming in modules. The type system was introduced and the function of the type system in a logic programming language was discussed

    マッショウ ジョウミャク センシ ニ オケル ジョウミャク ドチョウ ヲ エル タメノ ホウホウ ニ カンスル チョウサ ホウコク

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    本研究では、前腕で静脈穿刺をする際に、静脈怒張を得るために実際に臨床で行われている方法を明らかにする目的で、質問紙を作成して実態調査を行った。回収率は70.5%であり、このうち309名の回答(有効回答率99.4%)を分析対象とした。静脈怒張を得るために最もよく行う方法として、割合が高い順にマッサージ(20.7%)、温める(20.1%)、クレンチング(18.4%)、叩く(15.9%)、手をしっかり握らせる(13.3%)の5つの方法に1割以上の支持が集まり、マッサージ、温める、叩く方法は、標準採血法ガイドラインが推奨する方法と一致していた。この他には、駆血帯をきつく締め直す方法(4.5%)と腕を下してから駆血する方法(3.6%)を提示したが、支持する人は少数であった。一方、これらの方法を行ったことがある人が感じる主観的効果が最も高かったのは、もっともよく行われるマッサージではなく、温める方法であった。このことから、多忙な臨床現場においては、すぐに実施できる方法を優先する傾向があり、それを試してみてから、手間や時間はかかるが効果のある方法を行っているのではないかと考えられる。また、それぞれの方法における手技は、回答者により様々であることが分かり、今後は、静脈怒張の効果を検証した上で、簡便で確実な手技を示すことが必要と考えられた

    ジョウミャク センシ ニ ユウコウ ナ ジョウミャク ドチョウ ヲ エルタメノ テキセツ ナ クケツアツ ト ジョウミャク ドチョウ ニ カンヨスル キャッカンテキ シヒョウ ニツイテ

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    静脈穿刺時に有効な静脈怒張を得るための適切な駆血圧を検討すると共に、静脈怒張度の客観的指標を得ることを目的に、種々の駆血圧における触知静脈怒張度(怒張度)、および静脈断面積等の変化について検討した。対象者は健常成人46名、マンシェットを上腕に装着し、20〜100mmHgで1分間駆血した。駆血圧は順不同とした。駆血後の怒張度は駆血圧80mmHgまでは増加したが、100mmHgではやや減少した。駆血圧60mmHgと80mmHgの間には怒張度に有意な差がみられなかったが、他の駆血圧間では有意な差がみられた。怒張度は圧迫にて静脈が潰れ始める圧力(静脈触知した時の血管抵抗の指標)、静脈拡張比、静脈断面積の順で相関が高く、皮膚表面から静脈までの距離との間にはやや負の相関がみられた。以上より、駆血圧は60mmHgが適切であり、怒張度の客観的指標としては圧迫にて静脈が潰れ始める圧力が最も適切と考えられた。The purpose of this study was to examine appropriate tourniquet pressure to obtain effective vein distention for venipuncture, and discuss the objective indices for vein distention. Several parameters for vein distention, such as vein cross-section area, were calculated under different tourniquet pressures. Subjects (46healthy adults; 23men, 23women), had a pneumatic tourniquet (width 13cm) applied at the upper arm. and the tourniquet was inflated to 20, 40, 60, 80 or 100mmHg for one minute. The tourniquet pressure was randomized. Venous distention grade by palpation (VDGp) was increased up to 80mmHg of tourniquet pressure, but then slightly decreased at 100mmHg. VDGps for 60 and 80mmHg were not significantly different, but both were significantly higher than that of 20 and 40mmHg. VDGp correlated well with outer pressure, which begins to collapse the vein (index of venous resistance at palpation), the expansion ratio of vein cross-section area before and after tourniquet application, and the vein cross-section area successively.These data suggest that a tourniquet pressure of 60mmHg is appropriate for effective vein distention for venipuncture, and outer pressure, which begins to collapse the vein, is useful for an objective index of vein distention

    カンタン ニ テキセツ ナ ツヨサ デ ソウチャク デキル ジョウミャク センシ ヨウ クケツタイ ノ カイハツ

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    看護師が前腕に静脈穿刺をする際にゴム管駆血帯を用いた場合の駆血圧は70-95mmHgが適切と報告されているが、看護師が駆血帯を装着する強さは幅広く分散しており、高すぎる傾向にある。この原因の一つとして、駆血帯には適切な目安が無く、意図した強さで装着することが難しいことが考えられた。そこで、適切なく血圧の指標となるメモリを付けた駆血帯を開発し、その性能について検討した。60名の対象者(平均年齢40.5歳、範囲21-78歳)に駆血帯を上腕周囲径より1-4メモリ短く装着した時の駆血圧の平均はそれぞれ45,76,110,144 mmHgであり、静脈の断面積は3メモリまでは増加したが、4メモリまで短くするとやや減少した。静脈穿刺可能な怒張が得られた対象者はそれぞれ30%,80%,90%,85%で、3メモリまでは増加したが、4メモリ短くするとやや減少した。この駆血帯では上腕周囲径より2-3メモリ短く装着するのが適切と考えられた。When nurses attempt venipuncture at the forearm, they apply a tourniquet at the upper arm to distend the forearm vein. Appropriate gum-tube tourniquet pressure is reported to be between 70-95mmHg. But tourniquet pressure applied by japanese nurses in clinical situations is often too high and widely distributed. One of the reason they do not apply tourniquets with appropriate pressure is that the tourniquets they use have no marks for applying the appropriate pressure. So, we developed a new tourniquet with marks for applying appropriate pressure, and we studied the effectiveness of this tourniquet. Sixty subjects (mean age40.5 years old, range:21-78 years old) were enrolled. When we applied tourniquets with tourniquet lengths 1, 2, 3, and 4 marks shorter than the circumference of the upper arm, mean tourniquet pressures were 45.1±6.7mmHg, 76.0±12.2mmHg,109.6±13.0mmHg, and 143.7±24.7mmHg respectively, and vein cross section area increased according to the stretch strength until 3 marks, then decreased slightly at 4 marks. The percentages of subjects with sufficient vein distention for venipuncture were about 30%, 80%, 90%, and 85% respectively. The results indicated that applying tourniquet with 2 marks or 3 marks shorter is appropriate for venipuncture, while 4 marks is too strong

    The Essence of Fate Belief: The Perceptions of Control

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    本研究欲了解人們所遭遇到情境極端性高低和個人所擁有的資源多寡如何影響人們對於整體情況的自覺可控性,及自覺可控性又如何引發不同共享內隱信念,隨又如何出現不同的因應方式與行為。我們首先藉由前置研究中的開放式問卷來了解參與者在遭遇哪些事件時會出現不同共享內隱信念的想法。隨後在實驗一中,我們使用故事腳本進行事件的極端性和所擁有資源的多寡之操弄。結果除了具有極端性和資源多寡的主要效果外,在傷勢好轉可能性的事前比較分析上也出現了預期的結果,在半身不遂(極端)的情況下,人脈頗佳(M資源多= 63.00)情境中的受試者認為傷者傷勢好轉的可能性顯著高於人脈不佳者(M資源少= 45.83),而在手骨骨折(非極端)的情況下,人脈好壞則並無顯著效果。實驗二則以實驗法進行,並以較貼近生活中可能遭遇到之事件進行極端性、資源多寡和運氣的操弄。另外,在實驗二中也直接測量了參與者在不同極端性和資源多寡操弄的情境中個體的整體自覺可控性和所引發的共享內隱信念。結果顯示,在掌握程度上,出現了極端性和資源多寡的主要效果。在非極端的情境(M = 3.45)中參與者的掌握程度顯著高於極端的情境(M = 2.90),而在資源較多的情境(M = 3.30)中參與者自覺的掌握程度也邊緣顯著高於資源較少的情境(M = 3.03),但在交互作用則未達顯著。我們也將三種共享內隱信念,各自進行不同操弄情境的事前比較分析,結果並未發現有任何顯著差異存在。最後我們以不冒險意願、冒險意願及冒險與否的選擇,分別進行極端性、資源多寡及運氣的三因子變異數分析,結果皆無出現顯著的三階交互作用效果,但在不冒險意願上,則出現了與自覺可控性相似的二因子交互作用。未來研究可試著直接操弄自覺可控性,藉此驗證個體之「自覺可控性」是否可做為影響共享內隱信念、認知和行為上的重要因子。Chiu et al. (2011) analyzed both Chinese and English proverbs, and revealed that there are three different fate belief orientations: personal agency, fatalism and negotiable fate. In the present study we proposed that the extremity of the encountered events and the resources one possesses together can lead to different degrees of perceived control, which could activate different fate beliefs. We used open-ended questionnaires to explore how participants perceived the relationships between encountered events and fate beliefs in the pilot study. In experiment1 we employed scenario story to manipulate events extremity (high vs. low) and the resources one possesses (abundant vs. little). The main dependent measure was the possibility of recovery of the main character in the scenario. As predicted, besides two main effects, the results also showed that in the high extremity situation, participants believed those who had abundant resource (M = 63.00) had higher possibility of recovery than those had only little resource (M = 45.83). In the low extremity situation, the impact of available resource was not significant. That is, no matter the main character had resource or not, participants believed that he stood a good chance of recovery. In experiment 2, a total of 137 participants were randomly assigned to a (event extremity: high vs. low) x 2 (available resource: sufficient vs. insufficient) x 3 (luck: good vs. bad vs. control) between-subjects experimental design. Besides participants’ perceived control of the situation, situated fate belief orientations and intention to take or avoid a risk were also measured. The results showed neither three-way nor two-way interaction. We only found two main effects for event extremity and available resource on perceived control and wiliness to avoid risk. That is, compared with those who in the low extremity situation, participants who encountered high extreme event would had less perceived control and were also less willing to take a risk. Also, participants who had little resource, compared with those who had sufficient resource, tended to report less perceived control and stronger intention of avoiding risk. The results from two experiments gave some support to the hypothesis that the extremity of the encountered events and the resources we possess did affect our perceived control of the situation and therefore affect how we interpret and react to the situation. These findings and other implications were also discussed

    Design and Analysis of an Embedded PCI Network Card Based on TriMedia Processor

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    力图通过一个实例来说明如何开发基于TriMedia数字信号处理器的嵌入式网卡驱动程序,并提出了一种在pSoSystem操作系统下开发设备驱动程序的通用方法。Tried to illustrate how to design the embedded pci network driver based on TriMedia with an example,what's more,we propose a general method to develop the embedded network driver in the pSoSystem operation system

    Type system in programming language Gdel

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    Gdel语言是一种说明性逻辑程序设计语言。该语言基于一阶逻辑,引入了一个多态多类的类型系统和多种新的语言成分,支持抽象数据类型和模块化程序设计等技术,语言本身也具有很强的说明性语义。详细介绍了Gdel语言的类型系统及其构造,对在逻辑程序设计语言中引入类型系统的作用进行了一些深入的分析和讨论。Gdel is a declarative logic programming language.It is based on first order logic with a polymorphic many-sorted type system.Having a strong declarative semantic Gdel can be used to realize abstract data types and programming in modules.The type system was introduced and the function of the type system in a logic programming language was discussed
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