【正文】 the explanation of the tax reform act of 1986 was more than thirteen hundred pages long (Pub. L. 99514, Oct. 22, 1986, 100 Stat. 2085). Commerce Clearing House, a publisher of tax information, released a version of the Internal Revenue Code in the early 1990s that was four times thicker than its version in 1953. Changes to the tax laws often reflect the times. The flat tax of 1913 was later replaced with a graduated tax. After the United States entered world war i, the War Revenue Act of 1917 imposed a maximum tax rate for individuals of 67 percent, pared with a rate of 13 percent in 1916. In 1924 Secretary of the Treasury Andrew W. Mellon, speaking to Congress about the high level of taxation, stated, The present system is a failure. It was an emergency measure, adopted under the pressure of war necessity and not to be counted upon as a permanent part of our revenue structure…. The high rates put pressure on taxpayers to reduce their taxable ine, tend to destroy individual initiative and enterprise, and seriously impede the development of productive business…. Ways will always be found to avoid taxes so destructive in their nature, and the only way to save the situation is to put the taxes on a reasonable basis that will permit business to go on and industry to develop. Consequently, the Revenue Act of 1924 reduced the maximum individual tax rate to 43 percent (Revenue Acts, June 2, 1924, ch. 234, 43 Stat. 253). In 1926 the rate was further reduced to 25 percent. The Revenue Act of 1932 was the first tax law passed during the Great Depression (Revenue Acts, June 6, 1932, ch. 209, 47 Stat. 169). It increased the individual maximum rate from 25 to 63 percent, and reduced personal exemptions from $1,500 to $1,000 for single persons, and from $3,500 to $2,500 for married couples. The national industrial recovery act of 1933 (NIRA), part of President franklin d. roosevelt39。在我們的相互研究與探討中我們?cè)鲩L(zhǎng)了知識(shí)學(xué)到了不少的東西，在我們的相互幫助中我們才能順 利完成我們的課程設(shè)計(jì)任務(wù)所以我要感謝他們。使用 LabVIEW 進(jìn)行軟件模擬，可以達(dá)到同樣的效果，使我們獲得實(shí)踐的機(jī)會(huì)，同是也大大縮短程序開發(fā)時(shí)間。 鬧鐘系統(tǒng)設(shè)計(jì)圖 沈陽工程學(xué)院課程設(shè)計(jì)（ 論文） 10 DAQ 數(shù)據(jù)采集 原理 數(shù)據(jù)采集 (DAQ)原理為：從傳感器和其它待測(cè)設(shè)備等模擬和數(shù)字被測(cè)單元中自動(dòng)采非電量或者電量信號(hào) ,送到上位機(jī)中進(jìn)行分析，處理。 設(shè)計(jì)程序圖 圖 主面板設(shè)計(jì)圖 基于 LabVIEW 的 Apple Watch 系統(tǒng)的設(shè)計(jì) 5 數(shù)據(jù)轉(zhuǎn)換子 VI 設(shè)計(jì) 設(shè)計(jì)思路 該部分程序主要是對(duì)（ 0,1）布爾信號(hào)進(jìn)行處理，我們選用加法將輸入的字符串信號(hào)轉(zhuǎn)換為特定的數(shù)值信號(hào)，以用于作為事件結(jié)構(gòu)的輸入端，對(duì)觸發(fā)事件進(jìn)行選擇；選擇觸發(fā)事件后程序?qū)⑤敵鎏囟ǖ臄?shù)字量，將此數(shù)字量傳輸?shù)街鞒绦?VI 中用以選擇程序?qū)崿F(xiàn)的功能。 天氣系統(tǒng)：首先將數(shù)據(jù)信息寫入數(shù)據(jù)庫，然后通過字符串搜索控件搜索相應(yīng)的信息。 關(guān)鍵詞 ： labview Apple Watch 計(jì)時(shí) 傳感 基于 LabVIEW 的 Apple Watch 系統(tǒng)的設(shè)計(jì) III 目 錄 中 文 摘 要 II 1 設(shè)計(jì)任務(wù)描述 ................................................................................................................................. 1 設(shè)計(jì)題目：基于 Labview 的 Apple Watch 系統(tǒng)的設(shè)計(jì) ............................................................ 1 設(shè)計(jì)要求 .............................................................................................................................. 1 設(shè)計(jì)目的 .................................................................................................................... 1 基本要求 .................................................................................................................... 1 發(fā)揮部分 .................................................................................................................... 1 2 設(shè)計(jì)思路 ........................................................................................................................................ 2 3 設(shè)計(jì)方框圖 .................................................................................................................................... 3 4 各部分電路設(shè)計(jì)及參數(shù)計(jì)算 ............................................................................................................ 4 主面板設(shè)計(jì) .......................................................................................................................... 4 設(shè)計(jì)思路 ..................................................................................................................... 4 設(shè)計(jì)程序圖 ................................................................................................................. 4 數(shù)據(jù)轉(zhuǎn)換子 VI 設(shè)計(jì) .............................................................................................................. 5 設(shè)計(jì)思路 .................................................................................................................... 5 設(shè)計(jì)程序圖 ................................................................................................................. 5 主程序設(shè)計(jì) .......................................................................................................................... 6 設(shè)