数学代写|傅里叶分析代写Fourier analysis代考|MAST20026

相信许多留学生对数学代考都不陌生,国外许多大学都引进了网课的学习模式。网课学业有利有弊,学生不需要到固定的教室学习,只需要登录相应的网站研讨线上课程即可。但也正是其便利性,线上课程的数量往往比正常课程多得多。留学生课业深重,时刻名贵,既要学习知识,又要结束多种类型的课堂作业,physics作业代写,物理代写,论文写作等;网课考试很大程度增加了他们的负担。所以,您要是有这方面的困扰,不要犹疑,订购myassignments-help代考渠道的数学代考服务,价格合理,给你前所未有的学习体会。

我们的数学代考服务适用于那些对课程结束没有掌握,或许没有满足的时刻结束网课的同学。高度匹配专业科目,按需结束您的网课考试、数学代写需求。担保买卖支持,100%退款保证,免费赠送Turnitin检测报告。myassignments-help的Math作业代写服务,是你留学路上忠实可靠的小帮手!


数学代写|傅里叶分析代写Fourier analysis代考|Object Detection in Images

The normalized cross correlation (correlation coefficient) of images $x(m, n)$ and $y(m, n)$ is defined as
$$
r n_{x y}(m, n)=\frac{\sum_{k=-\infty}^{\infty} \sum_{l=-\infty}^{\infty}\left(x(k, l)-\bar{x}l\right)(y(k-m, l-n)-\bar{y})}{\sqrt{\sum{k=-\infty}^{\infty} \sum_{l=-\infty}^{\infty}\left(x(k, l)-\bar{x}l\right)^2 \sum{k=-\infty}^{\infty} \sum_{l=-\infty}^{\infty}(y(k-m, l-n)-\bar{y})^2}}
$$
The differences between this version and cross-correlation are: (i) the correlation is computed using the local mean-subtracted versions of the two inputs and (ii) the output is normalized to the range $-1-1$. One consequence is that the template cannot be composed of uniform values. The correlation coefficient is assigned the value zero, if the variance of the image over the overlapping portion with the template is zero. The higher the value of the coefficients, the better is the match between the template and the image. The fluctuating part of the values of the inputs is used in computing the correlation. The numerator is cross-correlation with the means subtracted. The denominator is a normalizing factor. It is the square root of the product of the variances of the overlapping samples of the inputs.

Consider the computation of the cross-correlation coefficients between $x(\mathrm{~m}, n)$ and $y(m, n)$.

$$
y(m, n)=\left[\begin{array}{rrr}
2 & 1 & 3 \
1 & 1 & -2 \
1 & 3 & 1
\end{array}\right] \quad x(m, n)=\left[\begin{array}{rrrr}
2 & 1 & 4 & 3 \
1 & -2 & 3 & 1 \
2 & -2 & 1 & -1 \
1 & 1 & -2 & 2
\end{array}\right]
$$
Subtracting the mean, $1.2222$ from $y(m, n)$, we get
$$
\begin{aligned}
y m(m, n) &=\left[\begin{array}{rrr}
2 & 1 & 3 \
1 & 1 & -2 \
1 & 3 & 1
\end{array}\right]-\left[\begin{array}{lll}
1,2222 & 1,2222 & 1,2222 \
1,2222 & 1,2222 & 1,2222 \
1,2222 & 1,2222 & 1,2222
\end{array}\right] \
&=\left[\begin{array}{rrr}
0.7778 & -0.2222 & 1.7778 \
-0.2222 & -0.2222 & -3.2222 \
-0.2222 & 1.7778 & -0.2222
\end{array}\right]
\end{aligned}
$$
The variance of $y m(m, n)$ is $17.5556$.
Subtracting the mean, $0.8889$, from part of $x(m, n)$ for a neighborhood $x(1: 3,2: 4)$.

数学代写|傅里叶分析代写Fourier analysis代考|Orthogonal Frequency Division Modulation

The purpose of a communication system is to transmit messages from source to destination. The source generates the message, such as human voice, an image, an email message, or some kind of information. These signals are, as in other engineering applications, mostly nonelectrical (e.g., speech signal, image, pressure, vibration, and room temperature). These signals are converted by transducers to electrical signals for the purpose of efficient processing, storage, and transmission. Typical examples of transducers are microphone, thermocouple, strain gauge, computer keyboard, and CCD cameras.

The message signals are of lowpass nature and are also called baseband signals. Over short distances, the baseband signal from a source can reach the destination without much degradation. When we talk with people, this is what happens. However, it is not practically possible to transmit a baseband signal over long distances, a major reason being the requirement of an antenna of large size.

Therefore, the baseband signals are embedded (called modulation) in a carrier signal of suitable high frequency and that signal is transmitted. For example, we can walk to a place that is nearby. To travel long distances, we need a carrier, such as a car. Of course, a car can carry some number of people. Similarly, using a set of highfrequency carriers, we can transmit more than one baseband signal simultaneously over a channel. Therefore, modulation makes the transmission of baseband signals over long distances possible, in addition to the ability to transmit a set of signals at the same time. The transmitted signals pass through a channel, such as a pair of twisted copper wires, a coaxial cable, an optical fiber, or a radio link.

At the receiver, the distorted signal, in passing through the channel along with the added noise, is processed to reduce the distortion and noise to acceptable levels. Then, the modifications done to the message at the transmitter are reversed (called demodulation) to get the receiver output. This signal is converted to its original form by an appropriate transducer.

One of the ways a set of signals is transmitted through a channel, over nonoverlapping frequency bands, is called frequency division multiplexing (FDM). Multiplexing is combining several signals in to a single signal. The bandwidth of the channel of transmission is divided into nonoverlapping parts, with each part carrying a baseband signal. At the receiver, bandpass filters are used to separate the signals. Practical filters have a transition band. Therefore, sufficient frequency gap must be left between two modulated signals. A recent digital communication method that provides significant advantages is the orthogonal frequency division modulation (OFDM). The input to a digital communication system is a sequence of digits. The source of input could be inherently digital or digitized analog signal.

数学代写|傅里叶分析代写Fourier analysis代考|MAST20026

数学代写|傅里叶分析代写傅里叶分析代考|图像中的物体检测

.图像中的物体检测


图像$x(m, n)$和$y(m, n)$的归一化互相关(相关系数)定义为
$$
r n_{x y}(m, n)=\frac{\sum_{k=-\infty}^{\infty} \sum_{l=-\infty}^{\infty}\left(x(k, l)-\bar{x}l\right)(y(k-m, l-n)-\bar{y})}{\sqrt{\sum{k=-\infty}^{\infty} \sum_{l=-\infty}^{\infty}\left(x(k, l)-\bar{x}l\right)^2 \sum{k=-\infty}^{\infty} \sum_{l=-\infty}^{\infty}(y(k-m, l-n)-\bar{y})^2}}
$$
这个版本和相互关之间的区别是:(i)使用两个输入的局部均值减去版本计算相关性,(ii)输出归一化到范围$-1-1$。一个后果是模板不能由统一的值组成。如果图像与模板重叠部分的方差为零,则相关系数赋值为零。系数的值越高,说明模板与图像的匹配越好。输入值的波动部分用于计算相关性。分子是相互相关的减去均值。分母是标准化因子。它是输入重叠样本方差乘积的平方根

考虑$x(\mathrm{~m}, n)$和$y(m, n)$之间的相互关系系数的计算

$$
y(m, n)=\left[\begin{array}{rrr}
2 & 1 & 3 \
1 & 1 & -2 \
1 & 3 & 1
\end{array}\right] \quad x(m, n)=\left[\begin{array}{rrrr}
2 & 1 & 4 & 3 \
1 & -2 & 3 & 1 \
2 & -2 & 1 & -1 \
1 & 1 & -2 & 2
\end{array}\right]
$$减去平均值, $1.2222$ 从 $y(m, n)$,我们得到
$$
\begin{aligned}
y m(m, n) &=\left[\begin{array}{rrr}
2 & 1 & 3 \
1 & 1 & -2 \
1 & 3 & 1
\end{array}\right]-\left[\begin{array}{lll}
1,2222 & 1,2222 & 1,2222 \
1,2222 & 1,2222 & 1,2222 \
1,2222 & 1,2222 & 1,2222
\end{array}\right] \
&=\left[\begin{array}{rrr}
0.7778 & -0.2222 & 1.7778 \
-0.2222 & -0.2222 & -3.2222 \
-0.2222 & 1.7778 & -0.2222
\end{array}\right]
\end{aligned}
$$
的方差 $y m(m, n)$ 是 $17.5556$.
减去平均值, $0.8889$,源自部分 $x(m, n)$ 对于一个社区来说 $x(1: 3,2: 4)$.

数学代写|傅里叶分析代写傅里叶分析代考|正交频分调制


通信系统的目的是将消息从源传输到目的地。源生成消息,如人的声音、图像、电子邮件消息或某种信息。与其他工程应用一样,这些信号大多是非电的(如语音信号、图像、压力、振动和室温)。为了有效地处理、存储和传输,这些信号由换能器转换为电信号。传感器的典型例子有麦克风、热电偶、应变计、计算机键盘和CCD相机

消息信号具有低通性质,也称为基带信号。在较短的距离内,源的基带信号可以到达目的地而没有太多的退化。当我们与人交谈时,就会发生这样的事情。然而,实际上长距离传输基带信号是不可能的,主要原因是需要大尺寸的天线


因此,基带信号被嵌入(称为调制)到合适高频的载波信号中,并传输该信号。例如,我们可以走到附近的一个地方。要长途旅行,我们需要一个载体,比如汽车。当然,一辆汽车可以载一定数量的人。同样,使用一组高频载波,我们可以在一个信道上同时传输多个基带信号。因此,调制除了能够同时传输一组信号外,还可以使基带信号的远距离传输成为可能。传输的信号通过一个通道,如一对铜线绞线、一根同轴电缆、一根光纤或一个无线电链路


在接收端,失真的信号在通过信道时连同附加的噪声一起被处理以将失真和噪声降低到可接受的水平。然后,在发送端对消息所做的修改被反转(称为解调),以获得接收端输出。这个信号由适当的换能器转换成它原来的形式


一组信号通过信道在不重叠的频段上传输的一种方式被称为频分复用(FDM)。多路复用就是把几个信号合并成一个信号。传输通道的带宽被分成不重叠的部分,每个部分携带一个基带信号。在接收端,带通滤波器用于分离信号。实用的滤波器有一个过渡带。因此,两个调制信号之间必须留有足够的频率间隙。最近一种具有显著优点的数字通信方法是正交频分调制(OFDM)。数字通信系统的输入是一串数字。输入源可以是固有的数字或数字化模拟信号

数学代写|傅里叶分析代写Fourier analysis代考

myassignments-help数学代考价格说明

1、客户需提供物理代考的网址,相关账户,以及课程名称,Textbook等相关资料~客服会根据作业数量和持续时间给您定价~使收费透明,让您清楚的知道您的钱花在什么地方。

2、数学代写一般每篇报价约为600—1000rmb,费用根据持续时间、周作业量、成绩要求有所浮动(持续时间越长约便宜、周作业量越多约贵、成绩要求越高越贵),报价后价格觉得合适,可以先付一周的款,我们帮你试做,满意后再继续,遇到Fail全额退款。

3、myassignments-help公司所有MATH作业代写服务支持付半款,全款,周付款,周付款一方面方便大家查阅自己的分数,一方面也方便大家资金周转,注意:每周固定周一时先预付下周的定金,不付定金不予继续做。物理代写一次性付清打9.5折。

Math作业代写、数学代写常见问题

留学生代写覆盖学科?

代写学科覆盖Math数学,经济代写,金融,计算机,生物信息,统计Statistics,Financial Engineering,Mathematical Finance,Quantitative Finance,Management Information Systems,Business Analytics,Data Science等。代写编程语言包括Python代写、Physics作业代写、物理代写、R语言代写、R代写、Matlab代写、C++代做、Java代做等。

数学作业代写会暴露客户的私密信息吗?

我们myassignments-help为了客户的信息泄露,采用的软件都是专业的防追踪的软件,保证安全隐私,绝对保密。您在我们平台订购的任何网课服务以及相关收费标准,都是公开透明,不存在任何针对性收费及差异化服务,我们随时欢迎选购的留学生朋友监督我们的服务,提出Math作业代写、数学代写修改建议。我们保障每一位客户的隐私安全。

留学生代写提供什么服务?

我们提供英语国家如美国、加拿大、英国、澳洲、新西兰、新加坡等华人留学生论文作业代写、物理代写、essay润色精修、课业辅导及网课代修代写、Quiz,Exam协助、期刊论文发表等学术服务,myassignments-help拥有的专业Math作业代写写手皆是精英学识修为精湛;实战经验丰富的学哥学姐!为你解决一切学术烦恼!

物理代考靠谱吗?

靠谱的数学代考听起来简单,但实际上不好甄别。我们能做到的靠谱,是把客户的网课当成自己的网课;把客户的作业当成自己的作业;并将这样的理念传达到全职写手和freelancer的日常培养中,坚决辞退糊弄、不守时、抄袭的写手!这就是我们要做的靠谱!

数学代考下单流程

提早与客服交流,处理你心中的顾虑。操作下单,上传你的数学代考/论文代写要求。专家结束论文,准时交给,在此过程中可与专家随时交流。后续互动批改

付款操作:我们数学代考服务正常多种支付方法,包含paypal,visa,mastercard,支付宝,union pay。下单后与专家直接互动。

售后服务:论文结束后保证完美经过turnitin查看,在线客服全天候在线为您服务。如果你觉得有需求批改的当地能够免费批改,直至您对论文满意为止。如果上交给教师后有需求批改的当地,只需求告诉您的批改要求或教师的comments,专家会据此批改。

保密服务:不需求提供真实的数学代考名字和电话号码,请提供其他牢靠的联系方法。我们有自己的工作准则,不会泄露您的个人信息。

myassignments-help擅长领域包含但不是全部:

myassignments-help服务请添加我们官网的客服或者微信/QQ,我们的服务覆盖:Assignment代写、Business商科代写、CS代考、Economics经济学代写、Essay代写、Finance金融代写、Math数学代写、report代写、R语言代考、Statistics统计学代写、物理代考、作业代写、加拿大代考、加拿大统计代写、北美代写、北美作业代写、北美统计代考、商科Essay代写、商科代考、数学代考、数学代写、数学作业代写、physics作业代写、物理代写、数据分析代写、新西兰代写、澳洲Essay代写、澳洲代写、澳洲作业代写、澳洲统计代写、澳洲金融代写、留学生课业指导、经济代写、统计代写、统计作业代写、美国Essay代写、美国代考、美国数学代写、美国统计代写、英国Essay代写、英国代考、英国作业代写、英国数学代写、英国统计代写、英国金融代写、论文代写、金融代考、金融作业代写。

发表评论

您的电子邮箱地址不会被公开。 必填项已用*标注

Scroll to Top