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電視廣播大學(xué)電大企業(yè)信息管理復(fù)習(xí)考試小抄【微縮打印版(留存版)

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【正文】 系統(tǒng)分析 D 系統(tǒng)實(shí)施 *作為 信息系統(tǒng)評價(jià)指標(biāo) 的有( ABCD) A 可靠性 B 經(jīng)濟(jì)性C 正確性 D 準(zhǔn)時(shí)性 *信息系統(tǒng)對產(chǎn)品質(zhì)量有那些影響 ?( ABCD ) A、利用信息產(chǎn)品軟件,簡化產(chǎn)品的設(shè)計(jì)與生產(chǎn)過程。 選擇: 1) 實(shí)用性,有可擴(kuò)充性; 2) 容易開發(fā)容易使用,較強(qiáng)的通信能力以及可靠、可用、可維性好,開放性好; 3) 信譽(yù)好的廠家產(chǎn)品;性能價(jià)格比高。 知識是信息,但是信息不一定是知識。 4) 促進(jìn)企業(yè)產(chǎn)品質(zhì)量的提高 。 2. 組織機(jī)構(gòu)與功能分析 :了解組織的總體結(jié)構(gòu)及組織內(nèi)部各部分 之間的關(guān)系;分析各組織機(jī)構(gòu)的職能是否明確,是否發(fā)揮了應(yīng)有的作用;分析組織機(jī)構(gòu)設(shè)置的合理性,找出存在的問題;根據(jù)計(jì)算機(jī)輔助管理的要求,為企業(yè)決策者提供調(diào)整機(jī)構(gòu)設(shè)置的參考意見。 請您刪除一下內(nèi)容, O(∩ _∩ )O 謝謝?。。?2021 年中央電大期末復(fù)習(xí)考試小抄大全,電大期末考試必備小抄,電大考試必過小抄 Acetylcholine is a neurotransmitter released from nerve endings (terminals) in both the peripheral and the central nervous systems. It is synthesized within the nerve terminal from choline, taken up from the tissue fluid into the nerve ending by a specialized transport mechanism. The enzyme necessary for this synthesis is formed in the nerve cell body and passes down the axon to its end, carried in the axoplasmic flow, the slow movement of intracellular substance (cytoplasm). Acetylcholine is stored in the nerve terminal, sequestered in small vesicles awaiting release. When a nerve action potential reaches and invades the nerve terminal, a shower of acetylcholine vesicles is released into the junction (synapse) between the nerve terminal and the ‘effector’ cell which the nerve activates. This may be another nerve cell or a muscle or gland cell. Thus electrical signals are converted to chemical signals, allowing messages to be passed between nerve cells or between nerve cells and nonnerve cells. This process is termed ‘chemical neurotransmission’ and was first demonstrated, for nerves to the heart, by the German pharmacologist Loewi in 1921. Chemical transmission involving acetylcholine is known as ‘cholinergic’. Acetylcholine acts as a transmitter between motor nerves and the fibres of skeletal muscle at all neuromuscular junctions. At this type of synapse, the nerve terminal is closely apposed to the cell membrane of a muscle fibre at the socalled motor end plate. On release, acetylcholine acts almost instantly, to cause a sequence of chemical and physical events (starting with depolarization of the motor endplate) which cause contraction of the muscle fibre. This is exactly what is required for voluntary muscles in which a rapid response to a mand is required. The action of acetylcholine is terminated rapidly, in around 10 milliseconds。 technically, the slope m of a straight line is the (trigonometric) tangent of the angle it makes with the xaxis. If the line is parallel to the xaxis, its slope is zero. Two or more lines with equal slopes are parallel to one another. In general, the slope of the line through the points (x1, y1) and (x2, y2) is given by m= (y2y1) / (x2x1). The conic sections are treated in analytic geometry as the curves corresponding to the general quadratic equation ax2+bxy+cy2+dx+ey+f=0, where a, b,?…?, f are constants and a, b, and c are not all zero. In solid analytic geometry the orientation of a straight line is given not by one slope but by its direction cosines, λ, μ, and ν, the cosines of the angles the line makes with the x, y, and zaxes, respectively。 the adoption of an approach to space in which all parts of the canvas played an equally vital role in the total work。 答: 重要環(huán)節(jié)的安全保障內(nèi)容: :防范內(nèi)部和外部人員利用計(jì)算機(jī)進(jìn)行犯罪;對信息系 統(tǒng)管理人員進(jìn)行培訓(xùn),提高管理水平;減少信息系統(tǒng)用戶錯(cuò)誤;簡化控制技術(shù)的復(fù)雜性,使人們操作起來。一般從社會效益和經(jīng)濟(jì)效益兩個(gè)方面來評價(jià) 四、論述題( 5 分,共 20 分): 管理信息系統(tǒng) 開發(fā)應(yīng)具備的 條件 及 其 作用 . 答: 條件 : 1)企業(yè)主要領(lǐng)導(dǎo)重視, 特別是一把手親自參與和領(lǐng)導(dǎo) , 也稱一把手原則 ; 2)企業(yè)具有開發(fā)管理信息系統(tǒng)的需求; 3)具有一定的科學(xué)管理的基礎(chǔ); 4)有一支高水平的信息系統(tǒng)開發(fā)的專業(yè)隊(duì)伍; 5)必要的資金支持和資源條件; 管理信息系統(tǒng)極大 提高了企業(yè)在市場中的生存能力和競爭力, 主要作用 : 1)對市場作出快速反應(yīng); 2)縮短生產(chǎn)周期; 3)降低產(chǎn)品成本; 4)及時(shí)了解市場信息。4)信息網(wǎng)絡(luò)成為社會發(fā)展的基礎(chǔ)設(shè)施。沒有人的認(rèn)識活動,就沒有知識。 數(shù)據(jù)資源管理 ; 包括: 數(shù)據(jù)的標(biāo)準(zhǔn)化 、 數(shù)據(jù)的定義 、 制定代碼體系 、 數(shù)據(jù)的安全保護(hù) 。 *資源是由 信息、信息基礎(chǔ)設(shè)施、人的因素 等三種要素組成。 系統(tǒng)按管理職權(quán)級別 的不同 分成 : 戰(zhàn)略管理級、戰(zhàn)術(shù)管理級 、作業(yè)處理級 。 邏輯設(shè)計(jì) : 指在邏輯上確定信息系統(tǒng)的功能,解決信息系統(tǒng)能 “ 做什么 ” 的問題,為下一階段的系統(tǒng)設(shè)計(jì)提供依據(jù)。 專家系統(tǒng) : 一個(gè)具有大量專門知識與經(jīng)驗(yàn)的計(jì)算機(jī)系統(tǒng),作為人工智能的一種技術(shù),把某一領(lǐng)域內(nèi)的專家們的知識提煉出來,建成一個(gè)知識庫,以解決該領(lǐng)域的有關(guān)問題和決策。 數(shù)據(jù)庫概念的基本目標(biāo)是 減少數(shù)據(jù)冗余、增加數(shù)據(jù)的獨(dú)立性 。 B、 有助于建立高標(biāo)準(zhǔn)的質(zhì)量體系。 避免 : 1) 先 購機(jī)后作系統(tǒng)分析與設(shè)計(jì); 2) 一味 求先進(jìn),把技術(shù)可行性建立在不成熟的時(shí)髦機(jī)上。作為人類知識,它是人類認(rèn)識世界的成果或結(jié)晶,其作用就是要幫助人們更好的認(rèn)識世界、理解世界和改造世 界,就是要消除或減少人們認(rèn)識的不確定性。 5) 促進(jìn)企業(yè)組織的變革 。 業(yè)務(wù)流程分析 : 對現(xiàn)有的 業(yè)務(wù)流程 進(jìn)行分析,提出合理的改進(jìn) 方案。 an enzyme (cholinesterase) breaks the transmitter down into choline and an acetate ion. The choline is then available for reuptake into the nerve terminal. These same principles apply to cholinergic transmission at sites other than neuromus
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