G*******s
发帖数: 4956 | 1 Letter from Visitor on Calvinism, Evil and God's Holiness
Today I received an email to my to Monergism.com account from a visitor name
d Shawn. He asked some important questions on on Calvinism, Evil and God's H
oliness. I have reproduced his email in full with my response (with a couple
paragraphs on Job that quote liberally from John Piper)
Dear Mr. Hendryx,
I've been reading your website with interest and find it to be one of the ve
ry best Calvinistic resources I've seen on the net. I am not... 阅读全帖 |
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G*******s
发帖数: 4956 | 2 我如何能认识神？
HOW CAN I KNOW GOD?
June, 1991
作者：提摩太?凯乐（TIM KELLER）
译者：唐兴 /校对：诚之
什么是基督教？有人说是它一种哲学，也有人说它是一种道德的立场，甚至还有人说它
实际上是一种经历。然而，这些说法都无法触及其核心。虽然每一种说法都讲到了基督
教的某个部分，但是，这些都不是基督教的定义。基督教的核心是人与神之间的一种交
换（transaction）。当一个人成为基督徒的时候，他就从远处对神的认识，移近至直接
或亲密地认识神。基督教就是认识神。
What is Christianity? Some say it is a philosophy, others say it is an ethic
al stance, while still others claim it is actually an experience. None of th
ese things really gets to the heart of the matter, however. Each is somethin
g a Christian ... 阅读全帖 |
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R*o
发帖数: 3781 | 3 Dave Hunt
John Calvin And His lnstitutes
Calvinism and the controversies surrounding it have confronted Protestants f
or more than four hundred years. Of course, the whole dispute in the church
goes back long before John Calvin to Augustine, Pelagius and others.
Aurelius Augustinus was born November 13, 354 at Tagaste, a small town near
the eastern border of modern Algeria. His father was a Roman official and a
pagan; his mother Monica, a Christian. In 386, after studies in philosophy,
law and t... 阅读全帖 |
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b*********d
发帖数: 596 | 4 http://www.npr.org/2011/08/09/138957812/evangelicals-question-t
Let's go back to the beginning — all the way to Adam and Eve, and to the
question: Did they exist, and did all of humanity descend from that single
pair?
According to the Bible (Genesis 2:7), this is how humanity began: "The Lord
God formed man of the dust of the ground, and breathed into his nostrils the
breath of life; and man became a living soul." God then called the man Adam
, and later created Eve from Adam's rib.
Polls by Gal... 阅读全帖 |
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R*o
发帖数: 3781 | 5 Defining Calvinism
In spite of many differences of opinion among Calvinists today, Calvinism is
generally explained by the acronym, TULIP. Philip F. Congdon writes that "a
tulip is a beautiful flower, but bad theology. The fruit of the flower is a
ppealing; the fruit of the theology is appalling . . . works, as an inevitab
le result, are necessary for salvation. To be fair, Classical Calvinists usu
ally object to this by describing the gospel message as not `faith + works =
justification,' but `... 阅读全帖 |
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e****i
发帖数: 2152 | 6 From: The Dark Side of Christian History
by Helen Ellerbe
Chapter Eight: 1450 - 1750 C.E.
The Reformation did not convert the people of Europe to orthodox
Christianity through preaching and catechisms alone. It was the 300 year
period of witch-hunting from the fifteenth to the eighteenth century, what R
.H. Robbins called "the shocking nightmare, the foulest crime and deepest
shame of western civilization." The Church created the elaborate concept of
devil worship and then, used the persecution ... 阅读全帖 |
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l**********t
发帖数: 5754 | 7 Chapter 1.2 God’s Dual Remedy: The Blood and the Cross
Thus in the first eight chapters of Romans two aspects of salvation are
presented to us: firstly, the forgiveness of our sins, and secondly, our
deliverance from sin. But now, in keeping with this fact, we must notice a
further difference.
In the first part of Romans 1 to 8, we twice have reference to the Blood of
the Lord Jesus, in chapter 3:25 and in chapter 5:9. In the second, a new
idea is introduced in chapter 6:6, where we are said to ... 阅读全帖 |
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l**********t
发帖数: 5754 | 8 Chapter 1.4 The Blood Is Primarily For God
The Blood is for atonement and has to do first with our standing before God.
We need forgiveness for the sins we have committed, lest we come under
judgment; and they are forgiven, not because God overlooks what we have done
but because He sees the Blood. The Blood is therefore not primarily for us
but for God. If I want to understand the value of the Blood I must accept
God’s valuation of it, and if I do not know something of the value set upon
the Blo... 阅读全帖 |
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l**********t
发帖数: 5754 | 9 Chapter 2.3 As In Adam So In Christ
In Romans 5:12 to 21 we are not only told something about Adam; we are told
also something about the Lord Jesus. “As through the one man’s
disobedience the many were made sinners, even so through the obedience of
the one shall the many be made righteous.” In Adam we receive everything
that is of Adam; in Christ we receive everything that is of Christ.
The terms ‘in Adam’ and ‘in Christ’ are too little understood by
Christians, and, at the risk of repetition, I... 阅读全帖 |
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l**********t
发帖数: 5754 | 10 Chapter 9: The Meaning and Value of Romans Seven
We must return now to our study of Romans. We broke off at the end of
chapter 6 in order to consider two related subjects, namely, God’s eternal
purpose, which is the motive and goal of our walk with Him, and the Holy
Spirit, who supplies the power and resource to bring us to that goal. We
come now to Romans 7, a chapter which many have felt to be almost
superfluous. Perhaps indeed it would be so if Christians really saw that the
old creation has ... 阅读全帖 |
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l**********t
发帖数: 5754 | 11 chapter 11.5 More Than Conquerors Through Him
We only see history back to the Fall. God sees it from the beginning. There
was something in God’s mind before the Fall, and in the ages to come that
thing is to be fully realized. God knew all about sin and redemption; yet in
His great purpose for the Church set forth in Genesis 2 there is no view of
sin. It is as though (to speak in finite terms) He leaps in thought right
over the whole story of redemption and sees the Church in future eternity,
ha... 阅读全帖 |
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l**********t
发帖数: 5754 | 12 Chapter 1.2 God’s Dual Remedy: The Blood and the Cross
Thus in the first eight chapters of Romans two aspects of salvation are
presented to us: firstly, the forgiveness of our sins, and secondly, our
deliverance from sin. But now, in keeping with this fact, we must notice a
further difference.
In the first part of Romans 1 to 8, we twice have reference to the Blood of
the Lord Jesus, in chapter 3:25 and in chapter 5:9. In the second, a new
idea is introduced in chapter 6:6, where we are said to ... 阅读全帖 |
|
l**********t
发帖数: 5754 | 13 Chapter 1.4 The Blood Is Primarily For God
The Blood is for atonement and has to do first with our standing before God.
We need forgiveness for the sins we have committed, lest we come under
judgment; and they are forgiven, not because God overlooks what we have done
but because He sees the Blood. The Blood is therefore not primarily for us
but for God. If I want to understand the value of the Blood I must accept
God’s valuation of it, and if I do not know something of the value set upon
the Blo... 阅读全帖 |
|
l**********t
发帖数: 5754 | 14 Chapter 2.3 As In Adam So In Christ
In Romans 5:12 to 21 we are not only told something about Adam; we are told
also something about the Lord Jesus. “As through the one man’s
disobedience the many were made sinners, even so through the obedience of
the one shall the many be made righteous.” In Adam we receive everything
that is of Adam; in Christ we receive everything that is of Christ.
The terms ‘in Adam’ and ‘in Christ’ are too little understood by
Christians, and, at the risk of repetition, I... 阅读全帖 |
|
l**********t
发帖数: 5754 | 15 Chapter 9: The Meaning and Value of Romans Seven
We must return now to our study of Romans. We broke off at the end of
chapter 6 in order to consider two related subjects, namely, God’s eternal
purpose, which is the motive and goal of our walk with Him, and the Holy
Spirit, who supplies the power and resource to bring us to that goal. We
come now to Romans 7, a chapter which many have felt to be almost
superfluous. Perhaps indeed it would be so if Christians really saw that the
old creation has ... 阅读全帖 |
|
l**********t
发帖数: 5754 | 16 chapter 11.5 More Than Conquerors Through Him
We only see history back to the Fall. God sees it from the beginning. There
was something in God’s mind before the Fall, and in the ages to come that
thing is to be fully realized. God knew all about sin and redemption; yet in
His great purpose for the Church set forth in Genesis 2 there is no view of
sin. It is as though (to speak in finite terms) He leaps in thought right
over the whole story of redemption and sees the Church in future eternity,
ha... 阅读全帖 |
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m****a
发帖数: 9485 | 17 1. The Book of Mormon teaches that little children are not capable of sin
because they do not have a sinful nature (Moroni 8:8). In contrast, the
Bible in Psalm 51:5 clearly teaches that we have sinful nature from birth: "
Surely I was sinful at birth, sinful from the time my mother conceived me" (
NIV). (This does not mean that those who die in infancy are lost.*)
小孩子犯错也没有能力承担，因为心智不到成熟的年龄，神的仁慈就免掉他们的责任。
关于大卫诗篇51：5，这里其他教派的弟兄的解释很好--这还并非我们教会的，可以参
考一下，并非所有基督教教派都相信原罪说的：
http://www.youtube.com/watch?v... 阅读全帖 |
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R*o
发帖数: 3781 | 18 E. Exposition Proper
In 1:16-17 Paul tells us why he is unashamed of the gospel and eager to prea
ch it, not only in Rome (1:15), but everywhere he goes. The reason is that t
he gospel is the power of God to save everyone who believes; it is the very
revelation of the righteousness of God!
1:16 Paul says that he is not ashamed of the gospel for it is God’s power t
o save the person who believes, whether Jew or Gentile (though the Jew had s
pecial privilege in the outworking of God’s plan).
The t... 阅读全帖 |
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R*o
发帖数: 3781 | 19 E. Exposition Proper
In 1:16-17 Paul tells us why he is unashamed of the gospel and eager to prea
ch it, not only in Rome (1:15), but everywhere he goes. The reason is that t
he gospel is the power of God to save everyone who believes; it is the very
revelation of the righteousness of God!
1:16 Paul says that he is not ashamed of the gospel for it is God’s power t
o save the person who believes, whether Jew or Gentile (though the Jew had s
pecial privilege in the outworking of God’s plan).
The t... 阅读全帖 |
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R*o
发帖数: 3781 | 20 C. Full Exegetical Outline
I. The basis for God’s wrath against the Gentiles and the fact that they ar
e without excuse is that they suppress the truth about God and have exchange
d the glory of God for idols (1:18-23).
A. The basis for God’s wrath against the Gentiles and the fact that they ar
e without excuse is that through their wickedness they suppress the obvious
truth about God’s eternal power and divine nature (1:18-20).
1. God’s wrath is revealed from heaven against all the unrighteousn... 阅读全帖 |
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R*o
发帖数: 3781 | 21 C. Full Exegetical Outline
I. The basis for God’s wrath against the Gentiles and the fact that they ar
e without excuse is that they suppress the truth about God and have exchange
d the glory of God for idols (1:18-23).
A. The basis for God’s wrath against the Gentiles and the fact that they ar
e without excuse is that through their wickedness they suppress the obvious
truth about God’s eternal power and divine nature (1:18-20).
1. God’s wrath is revealed from heaven against all the unrighteousn... 阅读全帖 |
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R*o
发帖数: 3781 | 22 C. Full Exegetical Outline
Idea: Though there is advantage in being a Jew this does not mean that unfai
thfulness and sin will render God unfaithful or that such behavior will not
go unpunished, even if it does demonstrate the righteousness of God.
I. The fact that God does not automatically bless circumcision does not mean
that there is no value in being a Jew for the Jews have indeed been blessed
, having receiving the very oracles of God (3:1-2).
A. What advantage does the Jew have or what is... 阅读全帖 |
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R*o
发帖数: 3781 | 23 C. Full Exegetical Outline
Idea: Though there is advantage in being a Jew this does not mean that unfai
thfulness and sin will render God unfaithful or that such behavior will not
go unpunished, even if it does demonstrate the righteousness of God.
I. The fact that God does not automatically bless circumcision does not mean
that there is no value in being a Jew for the Jews have indeed been blessed
, having receiving the very oracles of God (3:1-2).
A. What advantage does the Jew have or what is... 阅读全帖 |
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R*o
发帖数: 3781 | 24 F. Homiletical Idea and Outline
Idea: God’s Righteousness Given to Us by Faith…
I. Is Apart from Any Works We Could Do (3:21)
A. Apart from the Law
B. The Law and the Prophets
II. Is through the Faithfulness of Christ (3:22a)
III. Is for All of Us (3:22b-23)
A. For All Who Believe (3:22b-c)
B. There Is no Distinction (3:22c-23)
IV. Is Freely Given via Christ’s Redemptive Act (3:24)
A. By Grace (3:24)
B. Through the Redemption in Christ (3:24)
V. Is Rooted in God’s Justice (3:25-26)
A. Christ as ... 阅读全帖 |
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R*o
发帖数: 3781 | 25 F. Homiletical Idea and Outline
Idea: God’s Righteousness Given to Us by Faith…
I. Is Apart from Any Works We Could Do (3:21)
A. Apart from the Law
B. The Law and the Prophets
II. Is through the Faithfulness of Christ (3:22a)
III. Is for All of Us (3:22b-23)
A. For All Who Believe (3:22b-c)
B. There Is no Distinction (3:22c-23)
IV. Is Freely Given via Christ’s Redemptive Act (3:24)
A. By Grace (3:24)
B. Through the Redemption in Christ (3:24)
V. Is Rooted in God’s Justice (3:25-26)
A. Christ as ... 阅读全帖 |
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j*******u
发帖数: 712 | 26 CALVIN BELIEVED IN INFANT BAPTISM
Calvin said, "Baptism is properly administered to infants is something owed
to them."
CALVIN BELIEVED IN SACRAMENTS EQUAL TO GOD'S WORD
"Therefore, let it be regarded as a settled principle that the sacraments
have the same office as the Word of God: to offer and set forth Christ to us
, and in him the treasures of heavenly grace."
CALVIN BELIEVED IN AMILLENNIALISM AND WAS AGAINST PREMILLENNIALISM
Calvin said, "But a little later there followed the Chiliasts, wh... 阅读全帖 |
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R*o
发帖数: 3781 | 27 G. Contribution of Passage to Systematic Theology
Romans 5:12-19 is a key passage in discussions about the origin of sin. It i
s clear from this text that as far as the human race is concerned, sin enter
ed through Adam. Further, there is a direct connection between the transgres
sion of Adam and the sin of the entire race. Any explanation that attempts t
o soften or do away with this direct connection falls on difficult times in
vv. 18-19 and throughout the passage. The best explanation, then, ... 阅读全帖 |
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R*o
发帖数: 3781 | 28 Study By: Greg Herrick
A. Introduction
In his sermon, “Why Christ Had To Die,” author and pastor Stuart Briscoe s
ays:
Many years ago when the children were small, we went for a little drive in t
he lovely English countryside, and there was some fresh snow. I saw a lovely
field with not a single blemish on the virgin snow. I stopped the car, and
I vaulted over the gate, and I ran around in a great big circle striding as
wide as I could. Then I came back to the kids, and I said, “Now, children,
I... 阅读全帖 |
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R*o
发帖数: 3781 | 29 Study By: Greg Herrick
A. Introduction
In his sermon, “Why Christ Had To Die,” author and pastor Stuart Briscoe s
ays:
Many years ago when the children were small, we went for a little drive in t
he lovely English countryside, and there was some fresh snow. I saw a lovely
field with not a single blemish on the virgin snow. I stopped the car, and
I vaulted over the gate, and I ran around in a great big circle striding as
wide as I could. Then I came back to the kids, and I said, “Now, children,
I... 阅读全帖 |
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l**********t
发帖数: 5754 | 30
20. Therefore by the deeds of the law there shall no flesh be justified in
his sight: for by the law is the knowledge of sin.
"
20. Therefore by the works of the law, etc. It is a matter of doubt, even
among the learned, what the works of the law mean. Some extend them to the
observance of the whole law, while others confine them to the ceremonies
alone. The addition of the word law induced Chrysostom, Origen, and Jerome
to assent to the latter opinion;[106]for they thought that there is a
pecu... 阅读全帖 |
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l**********t
发帖数: 5754 | 31
21. But now the righteousness of God without the law [109] is manifested,
being witnessed by the law and the prophets;
"
21. But now without the law, etc. It is not certain for what distinct reason
he calls that the righteousness of God, which we obtain by faith; whether
it be, because it can alone stand before God, or because the Lord in his
mercy confers it on us. As both interpretations are suitable, we contend for
neither. This righteousness then, which God communicates to man, and
accepts ... 阅读全帖 |
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C*****e
发帖数: 367 | 32 费氏要理问答
THE
SHORTER CATECHISM
EXPLAINED
QUESTION 65. What is forbidden in the Fifth Commandment?
ANSWER: The Fifth Commandment forbiddeth the neglecting of, or doing any
thing against, the honour and duty, which belong to every one in their
several places and relations.
Q. 1. What is it to neglect the honour and duty which belong to every one in
their several places and relations?
A. It is not only to omit the performance of such relative duties altogether
, but even when they are performed, to d... 阅读全帖 |
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C*****e
发帖数: 367 | 33 费氏要理问答65
THE
SHORTER CATECHISM
EXPLAINED
QUESTION 65. What is forbidden in the Fifth Commandment?
ANSWER: The Fifth Commandment forbiddeth the neglecting of, or doing any
thing against, the honour and duty, which belong to every one in their
several places and relations.
Q. 1. What is it to neglect the honour and duty which belong to every one in
their several places and relations?
A. It is not only to omit the performance of such relative duties altogether
, but even when they are performed, to... 阅读全帖 |
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G*******s
发帖数: 4956 | 34 【 以下文字转载自 Church 俱乐部 】
发信人: Godwithus (神与我们同在), 信区: Church
标 题: 海德堡要理问答主日06
发信站: BBS 未名空间站 (Wed Apr 4 17:14:38 2012, 美东)
发信人: Godwithus (神与我们同在), 信区: BibleStudy
标 题: 海德堡要理问答主日06
发信站: BBS 未名空间站 (Wed Apr 4 17:12:42 2012, 美东)
海德堡要理问答主日06
来自CCWiki华人基督徒百科(Godwithus神同在网)
目录
1 英文版
2 英文2011版
3 赵中辉版
4 陈达/王志勇版
5 钱耀诚版（暂缺）
6 基督教要义圣经课程版
7 参考链接
英文版
6. Lord's day
Q. 16. Why must he be very man, and also perfectly righteous?
A.
Because the justice of God requires that the same human nature
which has sinned,... 阅读全帖 |
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r**t
发帖数: 115 | 35 Mother Mary, like us, was born in sin of sinful parents, but the Holy Spirit
covered her, sanctified and purified her so that this child was born of
flesh and blood, but not with sinful flesh and blood. The Holy Spirit
permitted the Virgin Mary to remain a true, natural human being of flesh and
blood, just as we. However, he warded off sin from her flesh and blood so
that she became the mother of a pure child, not poisoned by sin as we are.
For in that moment when she conceived, she was a holy m... 阅读全帖 |
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R*****i
发帖数: 2126 | 36 看到很多基徒和飞机反基在争论布鲁诺该不该烧死的问题，感觉十分搞笑。看来很多基
徒们根本就没有明白圣经的教义，也难怪，在中文里，sin和crime都是罪的意思，但在
圣经里完全是两个概念。sin是神马东东，在圣经里定义非常明白，不信耶和华的，就
是sin，原罪就是这么来的，亚当夏娃的sin并不是善恶果引起的病毒感染，而是被撒旦
引诱，没有完全对耶和华言听计从，所以不是义人。至于亚当夏娃是善人恶人，根本就
不是问题所在。
好了，搞清楚善人，恶人和义人的定义，再来看布鲁诺的问题，就不是问题了。布鲁诺
有没有crime，上帝根本就不在乎，但是布鲁诺绝对有sin，倒不是“日心说”直接引起
的，而是他根据“日心说”去相信那个泛神论，这就是大逆不道，反正铁定是要在硫湖
火海里被烧烤了。至于烧死布鲁诺的基徒，只要他信靠上帝，把灵魂交给上帝，那么他
就能去天国，至于天国究竟怎么回事，嘿嘿嘿。。。 |
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j*******7
发帖数: 6300 | 37 Why Doesn’t God Answer All My Prayers?
You don’t have to be a Christian long to recognize you don’t always get
what you pray for. Why doesn’t God seem to answer all our prayers? Is it
because we aren’t praying properly, or have we simply failed to recognize
God’s answer? Our ideas about prayer and God’s ideas about prayer are
sometimes very different. Look at Jesus’ model supplication in the Gospel
of Luke:
Luke 11:2-4
And He said to them, “When you pray, say: ‘Father, hallowed be Your name.
You... 阅读全帖 |
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P******l
发帖数: 1648 | 38 Jerry Hayes写下了Rollin' With the Flow
他的妻子June Hayes在九年前，他刚过世时在youtube上的留言。
（https://www.youtube.com/watch?&v=ZCHkeNqbBv8）
Thanks for mentioning that the writer was Jerry Hayes. Jerry and I were
married for 25 years (he died in January of 2007). Your Arkansas shots also
held more meaning to me because Jerry was born and raised in Springdale, AR
., then lived most of his adult life here in Memphis.
Jerry only had one problem with Charlie's recording. The end of the line
that begins 'I've got a l... 阅读全帖 |
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c****i
发帖数: 2635 | 39 感觉幸福就是有人照顾自己。。。 爱情就是被照顾后会想着折腾人家。。。
//blushing~```
今天阴差阳错地被一个印度MM拉到佛庙里去了。。。 听着梵音想着菩萨普度众生的宽
宏和金刚怒目的霹雳~``
忽然觉得派克博士的那些拿来搞团队还可以，要是感情生活也这么折腾，直接出家接受
供奉就成了，不需要沐浴人间烟火了~~` :">
ref: 附上一段，供童鞋们修行。。。
-----------------wiki--------------------
Theories
[edit] Discipline
In The Road Less Traveled,[6] Peck talked of the importance of discipline.
He described four aspects of discipline:
* Delaying gratification: Sacrificing present comfort for future gains.
* Acceptance of responsibility: Accepting respons... 阅读全帖 |
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h***o
发帖数: 539 | 40 变换到圆柱坐标(r, theta, z)
f(u, v)/r^2 = z/r^2 = a*cos^2(theta)+2b*cos(theta)*sin(theta)+c*sin^2(theta)
(*)
既然可以通过在(u, v)平面上转一个角度x,使f(u, v) = z = m*u^2 + n*v^2, then
RHS of (*) = m*cos^2(theta-x) + n*sin^2(theta-x) (**)
整理(**)两边,分成三项, 常数项, cos(2*theta)项, 和sin(2*theta)项
因为theta任意, 所以他们的系数都要分别相等....
a+c = m+n
(m-n)*cos(2x) = a-c
(m-n)*sin(2x) + 2b = 0
三个方程,三个未知数...解出来不难吧
随便推导的...方程可能有错,但方法应该可行 |
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h***o
发帖数: 539 | 41 会分离变量法吗？如果不会，建议花点时间学一下。
先按正常程序分离变量，然后根据问题的物理特性决定
到底是Y_n = sin(n\pi y) 还是 X_n = sin(n\pi x)，比如Y_n = sin(n\pi y)
然后霹雳啪啦带回去，把右边的常数也按sin(n\pi y)展开, 求出X_n就好了。
解应该是\Sigma X_n*sin(n\pi y) 的形式，这里假设正方形边长为1 |
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s*******r
发帖数: 921 | 42 You can try to deposit a layer of Silicon Nitride above the
oxide layer.
Usually, SiN can work as a hard mask for SiO.
Also, it is possible for you to find a good etch recipe
which has a high selectivity of SiN to SiO, say, 3:1. In
this way, the thickness of SiN depends on the selectivity
you finally get - for 3:1, you need at least 9000A SiN. At
such a thich SiN layer, you might need to consider issues
caused by stress of its.
And, it's very easy to strip Nitride by wet-etch - hot
H3PO4.
As for |
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f*******a
发帖数: 2662 | 43 两个概念,
信号,可以是 sin,square..., 它有一个频率,比如 1KHz, 100KHz, 1MHz
该信号无线传输之前需要被调制,调制模式可以是AM,FM,FSK,ASK,QPSK....
调制后的"信号"通过载频发射和接收,载频可以是 100MHz, 434MHz,915MHz, 1.2GHz.
接收的载频信号被解调后恢复出原来的波形,sin,square.......
这里说得sin,square....信号需要用Function Generator来获得
你说的RF signal generator,有sin,square信号输入后,通过调制获得
434MHZ的RF信号.
用来测试接收解调系统的话,把 RF signal generator输出接到被测系统的输入,
从系统输出解调后的信号也就是你要的sin,square....
在RF signal generator上有信号输入的BNC接口,从function generator输出口
用同轴线接上就可以了.
当然,如果RF signal generator自带信号发生器,就省事了
(信号周期1MHz,10KHz与 |
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h*****x
发帖数: 1 | 44
明
I think you confused when you assume that "这个似乎是高中的知识，我觉得似乎应
该可以阿". As far as my memory goes, 高中的知识 says that you can simplify the
expression a*sin(w) + b*COS(w).
From another perspective, sin(m*w) and sin(n*w) are orthogonal to each other,
and for m =1, and n =1, as in your case, sin(w) and sin(2*w+c) (c can be
whatever constant) are orthogonal, and therefore linearly independent.
This is checks also. |
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g****t
发帖数: 31659 | 45 他需要输出是 -va*sin(wt)
他已经有的电路是 -va*sina(w(t-75ns))=-va*sin(wt-75ns*w)
就是把-75*w这个延迟相位差弄掉就行了.
我想,不同频率都多等些时间,凑成
-va*sin(wt-2Pi)就行了
那么需要设计个2Pi-75ns*w的电路.
caso.
signal v = va*sin(w*t + phi)
after cable, v' = va*sin(w*t+phi')
phi'-phi = a*freq + b
something like this? |
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k*****y
发帖数: 744 | 46 Apply the power series of sin to A.
Here is my 2cents.
Note that sin(x)^2 + cos(x)^2 = 1 is an identity as formal power series.
When you restrict to the n-th order polynomial, it gives
[sin(x)^2 + cos(x)^2](n) = 1
up to a residual of higher order terms.
In the case of sin(A) and cos(A), the residual about the n-th order tailor
polynomial consists of summands like A^i/i!, which makes the residual go to
0 as n goes to infty. So after taking the limit
sin(A)^2 + cos(A)^2 = 1. |
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s***e
发帖数: 911 | 47 你肯定知道平面谐振子的动力学方程是:
(angular)''+(g/L)*Sin(angular)=0
g是重力加速度, L是线长, angular是偏离垂线的角度.
直接解这个方程不大容易, 用机械能守恒最容易. 下面用两种方法都作一作.
1. 机械能守恒:
动能T=(1/2)*m*L^2*(angular)'^2;
势能U=mgL(1-cos(angular))
其中势能零点选在angular=0处.
假设angular1是运动最高点, 于是
T(angular1)=0
U(angular1)=mgL(1-cos(angular1))
于是常数机械能就是:
E=U(angular1)==mgL(1-cos(angular1))=2mgLsin^2(angular1/2)
机械能守恒得到:
T(angular)=E-U(angular)=>
(dw/dt)=2(g/L)^(1/2)*[sin^2(w1/2)-sin^2(w/2)]^(1/2)
这里用w表示angular, w1表示angular1了.
=>dt=(1/2)*(L/g)^(1/2)*[sin^2(w1/2)-sin^2 |
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S*********g
发帖数: 5298 | 48 Well, try this, you will find out the answer
Sum[Sin[m*Pi/50],{m,1,n}]/.n->Infinity
Limit[Sum[Sin[m*Pi/50],{m,1,n}],n->Infinity]
The reason why the Limit function gives no anwser is
the summation result of sin is still some sin. And, the limit
for sin is kind of ambiguous stuff if you consider it separately.
/. just set the n to infinity without check the limit.
You can see that the summation is some bounded value for n->Infinity
while it should be zero, in fact.
When it is devided by n-> infini |
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x******g
发帖数: 318 | 49 2)如何证pi是无理数？
这个证明属于Ivan Niven。假设pi=a/b，我们定义（对某个n）：
f(x) = x^n(a-bx)^n/n!
F(x) = f(x) + ... + (-1)^jf^(2j)(x) + ... + (-1)^nf^(2n)(x)
这里f^(2j)是f的2j次导数.
于是f和F有如下性质（都很容易验证）:
1)f(x)是一个整系数多项式除以n!。
2)f(x) = f(pi-x)
3)f在(0,pi)区间上严格递增，并且x趋于0时f(x)趋于0，
x趋于pi时f(x)趋于pi^na^n/n!
4)对于0 <= j < n, f的j次导数在0和pi处的值是0。
5)对于j >= n, f的j次导数在0和pi处是整数（由1)可知）。
6)F(0)和F(pi)是整数（由4)，5)可知）。
7)F + F'' = f
8)(F'·sin - F·cos)' = f·sin （由7)可知）。
这样，对f·sin从0到pi进行定积分，就是
(F'(pi)sin(pi)-F(pi)cos(pi)) - (F'(0)sin(0)- |
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R*******e
发帖数: 25533 | 50 芬兰乐队，太好听了。以前都没听说过。今年草莓音乐节去了中国，安排在曼玉后上场
，结果一阵妖风掀了顶棚没演成。
Gone With the Sin
http://www.youtube.com/watch?v=Ifwf8RrU-94
I love your skin oh so white
I love your touch cold as ice
And I love every single tear you cry
I just love the way you're losing your life
Ohohohohoh my Baby, how beautiful you are
Ohohohohoh my Darling, completely torn apart
You're gone with the sin my Baby and beautiful you are
So gone with the sin my Darling
I adore the despair in your eyes
I worship your lips once red as wine
... 阅读全帖 |
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