【正文】 s Liaoning province, decades ago. The solider gave the old man a handmade saddle when they bid farewell. The story inspired Nasun to write Carved Saddle, a song that later became one of his most popular numbers. Now, every year, Nasun recruits young singers and dancers for the troupe. The troupe has also designed a new repertoire, which is mostly based on the daily lives of Mongolian people, especially the lives of nomadic families, and has bined contemporary musical elements with folk songs of the region. Haimu, a 25yearold khoomei (a local variant of overtone singing) singer, joined the troupe three years ago. Along with a sixmember band, he performs fast songs and soft ones that he writes－ all while playing the horsehead fiddle.Although I learned the piano since childhood and grew up listening to various kinds of music, to me, the folk music of Inner Mongolia is the root, he says. Performing in remote villages is pleasant. I feel at home on the boundless grasslands, and the warm people there make me feel fulfilled. The first round of spring auction season in Beijing ended last week, but it failed to create much spring in the art market. Although two pieces of Chinese painting fetched more than 100 million yuan, the decline in trading volume and sa le rate showed a downturn this year. In the ―Grand View: Chinese Painting Highlight‖ session at China Guardian 2022 spring auctions, Pan Tianshou’s representative work Eagle, Rock and Flora hit a record auction price of 279 million yuan, while Li Keran’s masterwork Jinggang Mountain fetched million yuan, an unexpected high in recent years. However, the trading volume fells to billion yuan from billion yuan in the same period the year before. The Huangchen 2022 Spring Auctions, which recorded million yuan in total sales, experienced the same. The section number went down to 5 from 12 pared to last year. According to expert Shao Jianwu, the art market did not attract much excitement this year due to the booming stock market and the persistent problems of fery and fake deals. The two pieces of Chinese painting notched up high price this spring due to their own value not due to a revival in the market. The successful transaction of two works with a hammer price of more than 100 million yuan once again confirms that valuable and rare works of high quality always earn the longlasting high price. Chinese painting and calligraphy is still the pillar of the market. However, the overall sales rate has dropped slightly, which reflects the demand for the ordinary auction goods has weakened,‖ said the president of China Guardian’s Hu Yanyan. Besides, the entry of new buyers also makes certain changes to the direction of purchasing. In a word, the overall market trend is very unpredictable. Although China Guardian 2022 Spring Auctions has achieved remarkable results, it does not mean that the market has walked out of the predicament. We still have to wait for the big economic boom to invigorate the art market.‖ Even so, the hot pursuit of some special items appeared this spring. A special session of China Guardian Spring Auctions titled ―Fine Gilt—Bronze Buddhist Images‖ achieved a great de。s Poly Theater. Their show, titled Ulan Muqir on the Grassland, depicted the history and development of the art troupe. Being from the region allowed me to embrace the culture of Inner Mongolia and being a member of the troupe showed me where I belonged, Nasun, the art troupe39。s performers of the troupe still tour the region39。t have a formal stage. The audience just sat on the grass. Usually, the performances became a big party with local people joining in. For him, the rewarding part about touring isn39。80s. We sat on the back of pickup trucks for hours. The sky was blue, and we couldn39。s Shaanxi province pass through a stop on the ancient Silk Road, Gansu39。 由于本人的水平有限，錯誤和疏漏在所難免，望老師和同學(xué)多多提出寶貴意見。楊老師對我孜孜不倦的教誨，使我受益非淺。畢業(yè)設(shè)計是對大學(xué)四年所學(xué)知識的一次綜合性檢測， 在設(shè)計的過程中，我學(xué) 會有針對性的查一些需要的中英文資料，并對傳感器理論、單片機理論、自動控制原理 等方面的知識進行了系統(tǒng)的學(xué)習(xí)，在鞏固了專業(yè)知識同時也學(xué)會了很多新的東西，了解了很多前沿學(xué)科的知識。 通過這次設(shè)計學(xué)會了查找問題、分析問題、處理問題的方法，可以說為今后的工作、學(xué)習(xí)都打下了比較堅實的基礎(chǔ)。 本次設(shè)計是對我 大學(xué)四年里所學(xué)的知識進行 了 綜合利用 。 在設(shè)計上還有很多潛力挖掘。 對整個系統(tǒng)進行聯(lián)合調(diào)試，使系統(tǒng)達到本次設(shè)計的設(shè)計要求。 硬件設(shè)計。 本次設(shè)計的具體步驟如下： 系統(tǒng)整體設(shè)計，根據(jù)設(shè)計要求，選擇合理可行的設(shè)計總體方案，實現(xiàn)系統(tǒng)功能。 本設(shè)計本著方便、實用性、易于擴展的指導(dǎo)思想，采用 AT89S52為中央處理器加上 各種外圍電路構(gòu)成了整個單片機控制 系統(tǒng)。要使酵母的繁殖與哀減，麥汁中糖度的消耗和雙乙酞等雜質(zhì)含量達到最佳狀態(tài) ，必須嚴(yán)格控制發(fā)酵各個階段的溫度。 結(jié)論 啤灑發(fā)酵是一個復(fù)雜的生物化學(xué)反應(yīng)過程。若超限，則輸出報警信號；若 在正常范圍，則清除報警信號。由以下函數(shù)構(gòu)成： ① Write_7221():MAX7221 寫字節(jié)函數(shù) ， 通過 Write_7221()函數(shù)可以向數(shù)碼管寫入顯示數(shù)據(jù)， 為顯示位置， da 為顯示代碼 ； ② Init_MAX7221():MAX7221 初始化函數(shù) ， 用于對 MAX7221 進行初始化； ③ display():顯示函數(shù) ，它 可以完成通道號、溫度值的顯示。若為正溫度， Flag 為 0；若為負溫度， Flag 為 1； ② Read Temperature():溫度讀取函數(shù) ， 調(diào)用 Read Temperature()函數(shù)可以讀取出第 n+1 個通道的溫度值，并將此溫度值返回 ； ③ abj_dat():顯示數(shù)據(jù)處理函數(shù) ，它 將讀取第 m+1 個通道上的溫度值，并將該數(shù)值各位上的數(shù)據(jù)存儲到顯示緩沖區(qū)。 數(shù)據(jù)處理子程序 數(shù)據(jù)處理子程序主要用于調(diào)用函數(shù)讀取 DS18B20 測量的溫度值 ， 并將其轉(zhuǎn)換成實際溫度值 ， 由以下函數(shù)構(gòu)成 ： ① Get_Tem():溫度值處理函數(shù) ， 通過 Get_Tem()可以將從 DS18B20 中讀取的溫度值合并成為一個 uint 型數(shù)據(jù) ， 然后返回。 DS18B20操作子程序就是實現(xiàn) 1Wire 總線的相關(guān)操作，根據(jù) DS18B20 的時序來編寫以下函數(shù)： ① Init_DS18B20():DS18B20 初始化函數(shù) ， 對指定 DS18B20 進行復(fù)位操作 ； ② Read_bit():DS18B20 讀位函數(shù) ， 實現(xiàn)從 DS18B20 中讀取一位二進制數(shù) 0或 1； ③ Write_bit():DS18B20 寫位函數(shù) ， 實現(xiàn)向 DS18B20 寫入一位二進制數(shù) 0 或1； ④ Read_byte():DS18B20 讀字節(jié)函數(shù) ， 從指定 DS18B20 處讀取一個字節(jié)數(shù)據(jù)，通過 8 次調(diào)用 Read_byte(）實現(xiàn)讀取功能； ⑤ Write_byte():DS18B20 寫字節(jié)函數(shù) ， 向指定的 DS18B20 寫入一個字節(jié)數(shù)據(jù)，通過 8 次調(diào)用 Write_bit()實現(xiàn)功能； ⑥ CRC():DS18B20 校驗字節(jié)計算函數(shù) ， 可以計算出有關(guān) DS18B20 內(nèi)部 ROM的 CRC 校驗碼； ⑦ Match_ROM():DS18B20 ROM 匹配函數(shù) ， 通過 Match_ROM()函數(shù)發(fā)送ROM 匹配指令 ， 接著送出 64 位 ROM 碼。 主循環(huán)設(shè)計 主程序主要完成系統(tǒng)的初始化，然后通過循環(huán)對各通道 DS18B20 采集溫度信號并通過數(shù)碼管實現(xiàn)溫度顯示，同時在測量超限時產(chǎn)生聲光報警信號。 圖 DS18B20 讀溫度程序流程圖 DS18B20 讀溫度程 序流程圖如圖 所示，首先通過初始化程序?qū)慰偩€進行復(fù)位，然后跳過內(nèi)部序列號讀取，啟動總線上所有的 DS18B20 進行溫度轉(zhuǎn)換。繼電器控制電路如圖 所示。 本設(shè)計就是采用直流驅(qū)動電壓為 +5V 的繼電器。如采用 TTL或 CMOS 等邏輯電平控制時，采用有足夠帶載能力的低電平驅(qū)動，并盡可能使 “0”電平低于 V。 繼電器的特性參數(shù)包括輸入