SMT標準 6個西格瑪是以改善為基礎的標準，真正的質量控制是要 達到零缺陷也就是7個西格瑪，這才是一個完美的質量控制過 程，但是這只是一個努力的目標。
上傳時間： 2018-03-14
上傳用戶：chang40703050
The 4.0 kbit/s speech codec described in this paper is based on a Frequency Domain Interpolative (FDI) coding technique, which belongs to the class of prototype waveform Interpolation (PWI) coding techniques. The codec also has an integrated voice activity detector (VAD) and a noise reduction capability. The input signal is subjected to LPC analysis and the prediction residual is separated into a slowly evolving waveform (SEW) and a rapidly evolving waveform (REW) components. The SEW magnitude component is quantized using a hierarchical predictive vector quantization approach. The REW magnitude is quantized using a gain and a sub-band based shape. SEW and REW phases are derived at the decoder using a phase model, based on a transmitted measure of voice periodicity. The spectral (LSP) parameters are quantized using a combination of scalar and vector quantizers. The 4.0 kbits/s coder has an algorithmic delay of 60 ms and an estimated floating point complexity of 21.5 MIPS. The performance of this coder has been evaluated using in-house MOS tests under various conditions such as background noise. channel errors, self-tandem. and DTX mode of operation, and has been shown to be statistically equivalent to ITU-T (3.729 8 kbps codec across all conditions tested.
標簽： frequency-domain interpolation performance Design kbit_s speech coder based and of
上傳時間： 2018-04-08
上傳用戶：kilohorse
1．據估計，地球上的綠色植物通過光合作用每年能結合來自CO2中的碳1500億噸和來自水中 的氫250億噸，并釋放4000億噸氧氣。光合作用的過程一般可用下式表示： CO2 + H2O + 微量元素(P、N等) (蛋白質、碳水化臺物、脂肪等)+O2 shape \* MERGEFORMAT 光能 葉綠素 下列說法不正確的是 A．某些無機物通過光合作用可轉化為有機物 B．碳水化合物就是碳和水組成的化合物
上傳時間： 2019-09-11
上傳用戶：hnjhnjhnj
The roots of this book were planted about a decade ago. At that time, I became increasingly convinced that wide-area and metropolitan-area networks, where much of my group’s research has been centered at that time, were in good shape. Although research in these fields was (and still is) needed, that’s not where the networking bottleneck seemed to be. Rather, the bottleneck was (and still is in many places) in the access networks, which choked users’ access to information and services. It was clear to me that the long-term solution to that problem has to involve optical fiber access networks.
上傳時間： 2020-05-31
上傳用戶：shancjb
對連續信號 （ ， ， ）進行理想采樣，可得采樣序列 。下圖給出了 的幅頻特性曲線，由此圖可以確定對 采用的采樣頻率。
上傳時間： 2020-12-26
上傳用戶：
其它原創視頻第72講 視頻教程說明及實戰書籍推薦.avi - 99.51MB第71講 怎樣加密PCB文件.avi - 17.65MB第70講 怎樣生成坐標文件.avi - 36.32MB第69講 怎樣利用gerber層檢查視圖.avi - 16.50MB第68講 出光繪文件：三.avi - 75.70MB第67講 出光繪文件：二.avi - 72.89MB第66講 出光繪文件：一.avi - 52.13MB第65講 調整位號絲印.avi - 71.91MB第64講 刪除死銅.avi - 17.68MB第63講 怎樣合并銅皮.avi - 40.67MB第62講 shape void操作演示.avi - 38.01MB第61講 修改銅皮輪廓及提高銅皮優先級.avi - 51.99MB第60講 shape的層間復制及其換層.avi - 54.76MB
上傳時間： 2022-06-05
上傳用戶：
pads layout是pads2007的核心模塊，是復雜的、高速印制電路板的最終選擇的設計環境。它是一個強有力的基于形狀化(shape-ased)、規則驅動(rules-driven)的布局布線設計解決方案，它采用自動和交互式的布線方法，采用先進的目標連接與嵌入(OLE)自動化功能，有機地集成了前后端的設計工具，包括最終的測試、準備和生產制造過程。
上傳時間： 2013-06-17
上傳用戶：eeworm
