Over the past ten years there has been a revolution in the devel- opment and acceptance of mobile products. In that period, cel- lular telephony and consumer electronics have moved from the realm of science fiction to everyday reality. Much of that revolu- tion is unremarkable – we use wireless, in its broadest sense, for TV remote controls, car keyfobs, travel tickets and credit card transactions every day. At the same time, we have increased the number of mobile devices that we carry around with us. However, in many cases the design and function of these and other static products are still constrained by the wired connections that they use to transfer and share data.
標(biāo)簽： Short-Range Essentials Wireless of
上傳時間： 2020-05-27
上傳用戶：shancjb
The challenges associated with the design and implementation of Electro- static Discharge (ESD) protection circuits become increasingly complex as technology is scaled well into nano-metric regime. One must understand the behavior of semiconductor devices under very high current densities, high temperature transients in order to surmount the nano-meter ESD challenge. As a consequence, the quest for suitable ESD solution in a given technology must start from the device level. Traditional approaches of ESD design may not be adequate as the ESD damages occur at successively lower voltages in nano-metric dimensions.
標(biāo)簽： Protection Circuit Device Design ESD and
上傳時間： 2020-06-05
上傳用戶：shancjb
Since electronic equipment was first developed, static electricity has been a source of problems for users and designers. In the last few years, however, electrostatic discharge (ESD) has become a source of major problems. This has occurred because newer electronic devices, such as integrated circuits, are much more susceptible to ESD problems than previous devices, such as vacuum tubes. Another trend compounding this ESD susceptibility problem is the spread of sophisticated equipment into home and office environments where ESD is quite common.
標(biāo)簽： Electronic Equipment ESD and
上傳時間： 2020-06-05
上傳用戶：shancjb
If you are acquainted with neural networks, automatic control problems are good industrial applications and have a dynamic or evolutionary nature lacking in static pattern-recognition; control ideas are also prevalent in the study of the natural neural networks found in animals and human beings. If you are interested in the practice and theory of control, artificial neu- ral networks offer a way to synthesize nonlinear controllers, filters, state observers and system identifiers using a parallel method of computation.
標(biāo)簽： Control Systems Neural For
上傳時間： 2020-06-10
上傳用戶：shancjb
PID-小車類-手機(jī)遙控十分mimi藍(lán)牙小車V2資料全部開源/**************************************************************************函數(shù)功能：增量PI控制器入口參數(shù)：編碼器測量值，目標(biāo)速度返回 值：電機(jī)PWM根據(jù)增量式離散PID公式 pwm+=Kp[e（k）-e(k-1)]+Ki*e(k)+Kd[e(k)-2e(k-1)+e(k-2)]e(k)代表本次偏差 e(k-1)代表上一次的偏差 以此類推 pwm代表增量輸出在我們的速度控制閉環(huán)系統(tǒng)里面，只使用PI控制pwm+=Kp[e（k）-e(k-1)]+Ki*e(k)**************************************************************************/int Speed_Incremental_PI (int Encoder,int Target){ static int Bias,Pwm,Last_bias; Bias=Encoder-Target; //計(jì)算偏差 Pwm+=Speed_Kp*(Bias-Last_bias)+Speed_Ki*Bias; //增量式PI控制器if(Pwm>500)Pwm=500;else if(Pwm<-500)Pwm=-500; Last_bias=Bias; //保存上一次偏差 return Pwm; //增量輸出}
上傳時間： 2022-06-01
上傳用戶：20125101110
本次畢業(yè)論文的內(nèi)容主要包括兩個方面：（1)確定基于膚色特征的人臉識別算法流程并實(shí)現(xiàn)MATLAB仿真.根據(jù)目前已有的人臉識別算法和學(xué)過的有關(guān)圖像處理知識確定出適合本次論文的最優(yōu)算法，確定算法時的重點(diǎn)是將膚色判斷作為人臉檢測的預(yù)處理，即研究膚色模型的選取和建立、膚色分割的方法以及人臉區(qū)域的獲得；再根據(jù)面部特征提取出人臉的大致框架，通過人臉面積、高寬比、歐拉數(shù)等來判斷每塊區(qū)域是否為人臉，最后得到圖片中人臉的比較精確的位置。在確定算法時就應(yīng)該要綜合考慮各方面的因素，要盡可能的提高人臉識別的時間效率，提高識別率。（2）設(shè)計(jì)出GUI界面，實(shí)現(xiàn)人臉識別功能。MATLAB/GUI自帶了很多工具箱函數(shù)，方便快捷。設(shè)計(jì)好的GUI界面只需通過鼠標(biāo)等簡潔的方式與計(jì)算機(jī)交換信息，選擇想要運(yùn)行的程序，實(shí)現(xiàn)快速識別。本次設(shè)計(jì)的GUT界面有窗口、光標(biāo)、按鍵、菜單、文字說明等對象（Object)，主要包含讀入圖像，轉(zhuǎn)換顏色空間，皮膚概率圖像，皮膚二值化和定位五個部分，其中使用了開關(guān)按鈕（ToggleButton)、靜態(tài)文本框（static Text)、坐標(biāo)系（Axes)和面板（Pane1)按鈕，要對其進(jìn)行合理布局，注意回調(diào)函數(shù)的嵌入。在設(shè)計(jì)過程中要熟悉MATLAB編程環(huán)境，注意控件的選用和參數(shù)設(shè)置，會根據(jù)設(shè)計(jì)要求對GUI界面進(jìn)行布局，注意回調(diào)函數(shù)的編寫，以達(dá)到理想的效果。該系統(tǒng)可以較好的實(shí)現(xiàn)單人臉識別，能較準(zhǔn)確的對其進(jìn)行定位。但對于多人組和背景較復(fù)雜的圖像，會出現(xiàn)漏檢和錯檢的現(xiàn)象，需要進(jìn)一步改進(jìn)。
標(biāo)簽： matlab 人臉識別系統(tǒng) gui
上傳時間： 2022-07-28
上傳用戶：qdxqdxqdxqdx
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