Peter Morici, an economist

来源: marketreflections 2010-01-28 07:23:01 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读: 次 (14295 bytes)
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Economists: Jobs fix won't be quick
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Economists: Jobs fix won't be quick
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Thu Jan 28, 2010 9:29am ESTFactboxPossible elements of jobs package
Mon, Dec 7 2009Related NewsPresident Obama pivots to jobs as key theme
Fri, Jan 8 2010
Obama pushes plans for more job creation
Tue, Dec 8 2009POLITICO (Washington) - President Barack Obama's job-creation program could produce a short-term political boost, but it's unlikely to significantly stem job losses and reduce the unemployment rate anytime soon, according to economists.

"People are out of work. They are hurting. They need our help. I want a jobs bill on my desk without delay," the president said during his State of the Union speech.

But even he acknowledged, that "the truth is, these steps won't make up for the 7 million jobs we've lost over the last two years."

Specifically, the president wants to give a tax break to businesses that hire workers, eliminate the capital gains tax on small business investments and use $30 billion in Troubled Asset Relief Program money to encourage community banks to lend to small businesses.

The president's package also would pump more government money into "green jobs" and infrastructure projects and extend unemployment benefits to those still out of work.

While Obama's emphasis on small business is new, many economists see the overall package as simply an extension of the $787 billion stimulus bill passed last year — and not a robust one, at that.

"He's trying to turn his microeconomic policies into some macroeconomic solution. He's grasping at straws," said Peter Morici, an economist at the University of Maryland.

"We are just going to have to ride this out over the next six months. If things don't get better in trade with China, we aren't getting out of this," he added.

Gus Faucher, director of macroeconomics at Moody's Economy.com, is not so negative, but he's not exuberant either.

"I think the package will make a difference around the edges," Faucher said. "But, at the end of the day, it will take a strong economic expansion to get job growth going again."

And Anne Kim, the economic program director for The Third Way, a moderate Democratic think tank, said the White House really isn't trying to secure a near-term boost in jobs.

"There is only so much anyone can do about the unemployment rate, and it's largely out of the government's control," said Kim.

"What they're aiming for is to lay out a long-term economic strategy and an agenda that re-engages middle-class Americans and persuades them that their best prospects for a better future lie with President Obama and Democrats," she added.

In a conference call with reporters before the speech, senior White House aides conceded that the jobs package has a familiar feel.

But National Economic Council Deputy Director Jason Furman said many of the problems — from job creation to government spending — "are all exactly the same as last year. A lot of the responses are building on what was done over the last year."

The newest emphasis in the package is its focus on small businesses, which are the largest generators of new jobs.

Many entrepreneurs and locally operated businesses have complained bitterly that they can't gain access to credit, despite the billions taxpayers poured into big banks to stabilize them last year.

By using TARP repayments from big banks to help small businesses, the White House hopes to show that Main Street is benefiting from the administration's efforts as well as Wall Street.

"Through sheer grit and determination, these companies have weathered the recession and are ready to grow. But when you talk to small business owners in places like Allentown, Pa., or Elyria, Ohio, you find out that even though banks on Wall Street are lending again, they are mostly lending to bigger companies. But financing remains difficult for small business owners across the country," Obama said.

As for the tax break for new hires, Morici questions whether it will have much impact without broader evidence that the economy is in full recovery. "Without customers, these guys aren't going to be hiring anyway," he said.

Robert Shapiro, a former Clinton administration economic adviser, said in a recent posting on the website of his firm, Sonecon, that the White House should focus on cutting the payroll taxes of employers who increase their work force.

Such a tax would be singularly focused on new jobs and could help avoid the nettlesome problem of defining which new hires would qualify for a tax break under the Obama proposal.

"Its projected power to boost follows directly from its success in creating jobs, since the new workers would spend virtually everything they earn," Shapiro argued.

Expansion of the stimulus spending program on infrastructure and green jobs could have more impact, but economists say it's unclear how quickly that money could be approved by Congress and pushed out into the market.

The vast majority of the big infrastructure projects approved under last year's stimulus programs are just now getting started. The White House has indicated that the bidding process could be accelerated for a second round this year because there wasn't enough money for all the worthy projects.

If that's the case, a quick turnaround could do some good by expanding the ongoing hiring of workers for the roads and bridge construction projects that economists say have indeed helped to bend the job loss rate.

But the benefit from the green jobs program — nicknamed by some as "cash for caulkers" because of its emphasis on home retrofitting — may not be as effective.

To be sure, the green job initiative has led to job creation. The wind industry recently told the New York Times that stimulus cash was vital to helping it endure the economic downturn.

And there is plenty of anecdotal evidence of business expansions prompted by the money being pumped into weatherizing houses and other projects. Evergreen Recycling, a Las Vegas firm, hired 60 people with the help of stimulus funds.

But Faucher said "green jobs are a small piece of the puzzle. We can't count on that to spur significant job growth."

He said a more efficient and effective way the White House and Congress could influence the unemployment rate would be to ship billions in aide to state and local governments, which are on the verge of laying off hundreds of thousands of workers.

In a recent interview with POLITICO, National Economic Council Chairman Larry Summers was lukewarm to that proposal, noting that some states didn't use stimulus dollars last year to save jobs but put it in "rainy day" accounts.

"This is the rainy day, so hopefully they will start using them," said Faucher.

One Obama proposal that the economists all agreed would be prudent is the expansion of unemployment benefits.

"Jobless people can be counted on to spend everything extra they receive," said Shapiro. "It also has the virtue of doing some good for millions of people."

(c) Capitol News Company, LLC 2010





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狭义相对论动力学 在动量、能量守恒的基础上,得到质量与运动状态的关系,以及质能公式。定義動量,只与速度大小有关 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (11278 bytes) () 06/19/2010 postreply 14:14:44

张璞扬力学 在本征参考系中进行的测量称为本征测量或原测量,测得的长. 度、时间间隔为本征长度或固有长度、本征时间间隔或固有时. -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (3497 bytes) () 06/19/2010 postreply 14:48:23

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相位比时间更直接更清晰地反映振子运动的状态. -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (51 bytes) () 06/19/2010 postreply 17:23:52

质点运动学本质上系几何学. 由此可见,质点运动学本质上系几何学.凭借笛卡儿几何学 和微积分学,便形成了一个定量的解析的质点运动学 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (20788 bytes) () 06/19/2010 postreply 15:28:19

笫二章 质点动力学 笫三定律不涉及运动,不要求参考系是 惯性系;对于接触力,笫三定律总是正确的, 惯性系;对于接触力,笫三定律总 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (30124 bytes) () 06/19/2010 postreply 15:40:53

笫1章 运动的独立性原理又叫运动的迭加性原理 1 of 三大原理 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1849 bytes) () 06/20/2010 postreply 09:23:21

量子力学中的态叠加原理 抛体运动这类匀变速平面运动,可看成两个同时进行的各自独立的直线运动的叠加 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1137 bytes) () 06/20/2010 postreply 09:30:53

对于质量可以比拟的孤立两体问题,总可以把其中一个物体看作固定力心,只要另一物体的质量用约化质量代替这就是说,无固定力心的两体问题 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (14460 bytes) () 06/19/2010 postreply 16:56:08

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费曼能量守恒 在自然界所经历的种种变化之中,有一个称之为能量的物理量是不变的 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (361 bytes) () 06/19/2010 postreply 18:34:08

elearning.stut.edu.tw 加速度的法線分量表示速度方向的時間變率。因為它永遠朝向曲率中心,此分量有時稱為向心加 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (4178 bytes) () 06/20/2010 postreply 08:57:07

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解析几何是用代数方法(借助于坐标(x,y)或(x,y,z)或(ρ,θ)来研究几何图形的性质,所以曲线或曲面的方程必然是依赖于选定 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1111 bytes) () 06/20/2010 postreply 09:13:25

张璞扬力学ppt-2 笫二章 质点动力学 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (28554 bytes) () 06/20/2010 postreply 09:49:08

笫一章 质点运动学 平面极坐标系:平面运动时质点加速度总是指向空间 某一固定点 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (20770 bytes) () 06/20/2010 postreply 09:53:27

平面极坐标系(圆周运动) wave fucntions 直角坐标系:质点加速度为常数; 自然坐标系:质点运动轨迹固定或已知 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (277 bytes) () 06/20/2010 postreply 10:03:45

平面極坐標係是正交曲線坐標系,其平面坐 标网格由一组同心圆( 標網格由一組同心圓( 1 1 c c r = r = )及一组放射 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (10137 bytes) () 06/20/2010 postreply 10:10:45

消去時間 t t , 则得到轨道方程 ,則得到軌道方程,运动学正问题 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (62 bytes) () 06/20/2010 postreply 10:21:31

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表征物质存在、运动的物理量被抽象化了;时间、空间与物质的存在不再是独立的了;表征物质运动、存在原因的力学量也就更为抽象化了 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1099 bytes) () 06/20/2010 postreply 14:55:21

解析几何是用代数方法(借助于坐标(x,y)或(x,y,z)或(ρ,θ)来研究几何图形的性质; 平面极坐标系研究有心力作用的力学问 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (10355 bytes) () 06/20/2010 postreply 10:17:10

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视重是指物体对支物体的压力或悬挂物对物体的拉力,也就是台秤或弹簧秤的读数,是可以改变的;实重就是物体的重力,它与运动状态无关,不 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (6585 bytes) () 06/20/2010 postreply 18:08:23

电梯对人的支持力与人对电梯的压力相等,因为这两个力是一对平衡力,它们始终大小相等,方向相反.而人的重力与人对电梯的压力不相等 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1197 bytes) () 06/20/2010 postreply 18:23:38

電梯向上施力-向下體重=合力向上=人的質量X電梯向上加速度A,作用力=反作用力,所以磅秤讀數會比體重更大 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (6232 bytes) () 06/20/2010 postreply 18:29:24

狭义相对论动量 m与速度有关,由于空间各向同性,只与速度大小有关,m=m(v). -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (293 bytes) () 06/19/2010 postreply 14:19:44

将有限大物体无限细分为质量元-- 质点 ,利用独立原理,可以得到质元间的作用。 將有限大物體無限細分為質量元-- 質點 ,利用獨 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (12838 bytes) () 06/19/2010 postreply 13:12:34

引入有效势能的好处是把原来二. 维问题化为一维问题, -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (270 bytes) () 06/19/2010 postreply 13:24:38

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第七章 振动和波 平面波动力学方程,与频率无关,没有色散 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (315 bytes) () 06/19/2010 postreply 13:50:32

相对论中的固有长度和固有时间是指相对所选参照系静止的事物的长度和时钟走时,比如地面上两不动地点之间的距离,在地面上测得的就是固有 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1215 bytes) () 06/19/2010 postreply 14:30:47

狭义相对论时空观 同一物体速度不同,测量的长度不同。物体静止时长度测量值最大(原长最长)。 ... t0 固有 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (3504 bytes) () 06/19/2010 postreply 14:33:46

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电势能 场对带电体做功 使物体的机械能增加 能量哪里来? 由电场与电荷的相互作用能的减少作为代价 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (5852 bytes) () 06/18/2010 postreply 21:25:15

带电体在电场中移动时,场对带电体做功. ——能量传递. 作正功,带电体能量增加、电场能量降低;. 作负功,带电体能量减少、带电体 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2141 bytes) () 06/18/2010 postreply 21:38:09

电场力正做功:在做正功的过程中,电势能通过做功的形式把能量转化为其他形式的能,因而电势能减小 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (4873 bytes) () 06/18/2010 postreply 21:47:00

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正电荷产生的电场是从电荷向外发散的.好比太阳发光.负电荷产生的电场是从外向电荷收敛. -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (496 bytes) () 06/18/2010 postreply 22:21:26

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考慮一個復標量場,相當于兩個實標量場。這個復標量有一個墨西哥帽形狀的勢能函數 (图) -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (7417 bytes) () 06/18/2010 postreply 18:33:51

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熱學中氣體分子間的交互作用勢能,它是大量分子勢能的和,實際不是用相對位置(位形)來描述的,而是用體積、溫度、壓強等熱學參量 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (533 bytes) () 06/17/2010 postreply 15:25:46

廣義勢能最主要的應用在於帶電粒子在電磁場中的邉由 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (372 bytes) () 06/17/2010 postreply 15:35:05

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If prices fall below the 200 day moving average during the forma -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (4711 bytes) () 06/18/2010 postreply 08:14:36

对沿闭合路径运动一周的物体做功为零;否则为非保守力(耗散力) -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (9814 bytes) () 06/18/2010 postreply 08:50:56

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刘煜辉:中国银行信贷90%都是以人民币资产作为抵押品发放的。资产价格上涨意味着信贷条件实质性地放松 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (4101 bytes) () 11/14/2010 postreply 08:01:43

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CPI shows fundamentals haven't changed - it's just been position -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2627 bytes) () 11/18/2010 postreply 07:53:42

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美国GSB Podium基金总裁郭胜北:人民币应成为国际储备货币 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (3302 bytes) () 06/24/2010 postreply 15:24:46

金融机构多达二万家. 数十万名职业交易员,电脑程序交易所占的纽约各大交易所的全天成交量,已经接近70% -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (6827 bytes) () 06/24/2010 postreply 15:33:05

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張雪川 5國政府負債2.5萬億歐元,占歐元區GDP比重為 28%。 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (3207 bytes) () 06/24/2010 postreply 19:54:23

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不同的场牛顿重量加速度系数(质量性质)不同,要先分段(过去资料)定性,然后才考虑场平衡中心,边缘偏离等 (图) -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (571 bytes) () 06/24/2010 postreply 16:51:26

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刘煜辉:资产泡沫之下,全社会劳动生产率停滞,这就是所谓经济“滞”的根源。而另一方面,因为害怕泡沫破裂的冲击而货币迟迟不敢实质性地 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (5299 bytes) () 07/04/2010 postreply 10:05:27

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只有具有无穷多自由度的系统在运动中才能自然容纳或显现出有限多自 由度的变化.而物理学中研究的"场"就是这样的具有无穷多自由度的系 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (353 bytes) () 07/05/2010 postreply 10:37:05

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《隐藏的逻辑》作者:[美]马克·布坎南/著 人类社会正在上演一场“量子革命”。物理学法则开始为我们描绘出一幅有关人或“社会原子” -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2298 bytes) () 07/13/2010 postreply 14:28:15

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约翰·肯尼斯(John Kenneth):经济系统之所以存活了下来,“不是因为那些预测经济未来的人工作做得有多杰出,而是因为他们 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2665 bytes) () 07/13/2010 postreply 18:01:59

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维数灾难一般也就是指高维空间下数据的稀疏性,高能着贡献多 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (575 bytes) () 07/25/2010 postreply 08:08:24

费曼图 粒子会在每一个可能的方式下相互作用:实际上,居间的虚粒子超越光速是允许的。(这是基于测不准原理,因深奥的理由而不违反相对 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (4370 bytes) () 07/25/2010 postreply 08:14:32

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对股市的最初印象,决定大多数股民的全部金融行为特征。 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2365 bytes) () 07/25/2010 postreply 08:34:30

D(k)是自旋为零的标量粒子的费曼传播子 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (335 bytes) () 07/25/2010 postreply 08:40:55

力学量是希尔伯特空间中的张量,一般是二阶的;狄拉克符号,把希尔伯特空间一分为二,互为对偶的空间 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (9566 bytes) () 07/25/2010 postreply 08:46:37

狄拉克符号法:狄拉克的q数理论(即符号法)已成为量子力学的标准语言,它包括表象理论和以q数为基础的方程 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (10612 bytes) () 07/25/2010 postreply 08:54:07

狄拉克“q数”vs.“c数”(c代表“普通”:海森堡矩阵乘法规则:p×q ≠ q×p,“泊松括号”。 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (9850 bytes) () 07/25/2010 postreply 09:01:43

"矩阵乘法规则群论"”:p×q ≠ q×p。( 数学上,矩阵就是由方程组的系数及常数所构成的方阵。一个事物乘另一个事物,结果不对 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (3182 bytes) () 07/25/2010 postreply 09:09:33

在数学及经典力学中,泊松括号是哈密顿力学中重要的运算,在哈密顿表述的动力系统中时间演化的定义起着中心角色。在更一般的情形,泊松括 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (709 bytes) () 07/25/2010 postreply 09:13:06

正规矩阵: 一个复矩阵和它的共轭转置的乘积可以交换次序 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (305 bytes) () 07/25/2010 postreply 09:56:23

"泊松括号时间演化", 在规则运动情形,相点轨迹对于初始条件的微小变动是稳定的 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2747 bytes) () 07/25/2010 postreply 09:25:40

PDF] 第九章正则方程 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2485 bytes) () 07/25/2010 postreply 10:00:21

热力学第二定律即需要矩阵L为正定矩阵。包含着力学中微观可逆生考量的统计力学意味着此一矩阵为对称矩阵。此一事实称为昂萨格倒易关系 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2686 bytes) () 07/25/2010 postreply 11:46:57

局部平衡。在某些例子中,有一堆分离的系统经由一堆分离的接连来相互作用着。连续系统则由测量每单位体积的外延量(如密度)及认为内涵量 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (835 bytes) () 07/25/2010 postreply 11:48:54

正规矩阵 normal matrix. 正则化,保守场化,有限维化,重整化,测度论,相对论也是测度论 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (919 bytes) () 07/25/2010 postreply 11:58:25

the importance of the market maker's delta-neutral position -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (484 bytes) () 07/24/2010 postreply 22:10:15

Pin Risk www.optionsatoz.com/ -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (11496 bytes) () 07/24/2010 postreply 22:27:38

trader http://www.deepcapture.com/wp-content/uploads/story-of-de -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (67 bytes) () 07/23/2010 postreply 16:04:27

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研究原子内部结构要用到的方法:微观粒子碰撞方法 電子與質子結合成氫原子時會放出強烈的紅光 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (4812 bytes) () 07/23/2010 postreply 17:02:23

连续对称性 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (329 bytes) () 07/24/2010 postreply 14:35:20

"ted spread chart" vix relates to credit mkt -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (53 bytes) () 07/16/2010 postreply 14:09:19

cboe.com video -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (42 bytes) () 07/16/2010 postreply 14:40:39

在这新的相空间内能量曲面方程就是球面方程 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (945 bytes) () 07/15/2010 postreply 14:38:08

相空间相体积不变,可积哈密顿系统,非混饨,否则就是混饨,就要不断对下边界定性定量 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (687 bytes) () 07/17/2010 postreply 03:50:59

数值解爱因斯坦场方程为啥难 [ 测不到的信号 ] (图) -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (6843 bytes) () 07/17/2010 postreply 04:10:26

能量守恒用现代哈密顿力学原理描述,就是其位置和动量所组成相空间相体积不变,但形状可以任意变化,呈现所有可能状态 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (41275 bytes) () 07/17/2010 postreply 05:19:45

而耗散系统则不然,相体积在演化过程中不断收缩,各种各样的运动在演化中逐渐衰亡,最后只剩下少数自由度决定的长时间行为,即:耗散系统 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (4797 bytes) () 07/17/2010 postreply 05:24:17

《生命之谜(探索者物语)》纯波动态只有动量而静质量为零,纯粒子态乃是只有静质量而动量为零的极化状态,实际上多数情况下呈现为波粒两 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (22801 bytes) () 07/17/2010 postreply 05:34:34

http://forrootbasic.51.net来访问物理科学探疑 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (20 bytes) () 07/17/2010 postreply 05:45:17

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微分方程 .李亚普诺夫函数 ,广义相对论的基本方程组也是这样的 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (3777 bytes) () 07/17/2010 postreply 11:44:59

非线性动力学,定性方法是由彭加莱和李亚普诺夫创立的,他们同时还建立了微分方程定性理论 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (20727 bytes) () 07/17/2010 postreply 11:51:43

“手性均一”指一种手性构象占绝对优势的现象。这种现象对于今天的生命是必需的 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (22970 bytes) () 07/17/2010 postreply 17:46:01

规范场理论,存在一种对称性就自动要求存在一种场,而且场可以有多个分量。人们可以应用该理论研究粒子的内部对称性 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1683 bytes) () 07/17/2010 postreply 17:48:29

量子场论:相互作用不再是由一种连续的场来传递,而是由这种场的激发(分离的虚粒子)来传递。这些虚粒子与真实粒子定域耦合,并在真实粒 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (16248 bytes) () 07/19/2010 postreply 15:39:49

自发的对称性破缺,萨拉姆设宴请客:“饭前服务员将餐具布置于圆桌周围,各碟子间和相邻碟子间的筷子都严格等距离。入席时客人坐在碟子后 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1707 bytes) () 07/17/2010 postreply 17:53:02

宇称不守恒的弱相互作用(这是杨振宁和李政道获得诺贝尔物理奖时的重要理论成果)通过中性流联合电磁相互作用,使手性分子两对映体的电子 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2176 bytes) () 07/17/2010 postreply 17:56:03

粒子物理(上)_章乃森 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (39 bytes) () 07/17/2010 postreply 18:08:20

电子伏特和伏特的概念不一样! -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (392 bytes) () 07/17/2010 postreply 18:15:36

三倍标准差效应 希格斯粒子 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (3463 bytes) () 07/17/2010 postreply 18:21:20

“三倍标准差原理”. -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2817 bytes) () 07/17/2010 postreply 18:25:32

大型强子对撞机 总能量达7万亿电子伏特的质子流对撞 数以百万计的粒子将在环形隧道内以每秒11245圈的速度“狂飙”,约为光速的9 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2633 bytes) () 07/17/2010 postreply 18:28:27

从反粒子到最终定律[第一推动丛书]【第三辑】. -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (38 bytes) () 07/17/2010 postreply 18:48:11

在费米理论中,中子和质子被认为形成一个与电流类似的带电的矢量流(记为V流),中微子与电子形成了另一个矢量电流 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (11550 bytes) () 07/18/2010 postreply 08:19:59

南部 潜藏的对称性 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1315 bytes) () 07/18/2010 postreply 08:22:47

电磁相互作用就是质子和中子同位旋对称破缺外因或同位旋破缺的机制 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1968 bytes) () 07/18/2010 postreply 08:43:49

粒子的性质可以分为两类。一类称为静态性质,例如质量、自旋、奇异数、同位旋、重子数、电荷等;另一类称为动态性质,例如寿命,衰变宽度 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (7470 bytes) () 11/29/2010 postreply 09:03:52

电磁相互作用就是质子和中子同位旋对称破缺外因或同位旋破缺的机制。 因为电磁相互作用的强度只有强相互作用强度的1/137,所以在只 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (7872 bytes) () 11/29/2010 postreply 09:05:05

张沁源,对称性,某种操作下的不变,所以你无法确定这样的操作是否进行过 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2337 bytes) () 07/18/2010 postreply 08:54:02

高涌泉:隱密的對稱 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (5772 bytes) () 07/18/2010 postreply 13:58:51

物理好图 电磁场方程:同稳定场一样,我们可以给变化电磁场引入势,导出关于势的微分方程,再求出势方程的解,进而利用场与势的关系定量 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (885 bytes) () 07/18/2010 postreply 12:54:52

物理好图 电磁场方程:同稳定场一样,我们可以给变化电磁场引入势,导出关于势的微分方程,再求出势方程的解,进而利用场与势的关系定量 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (129 bytes) () 07/18/2010 postreply 13:00:23

物理好图:当系统参量到达某个临界值时,原先具有对称性的状态失稳,新出现了 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (44461 bytes) () 07/18/2010 postreply 17:52:07

中国书画:非时空对称性。同时它讲究“胸有成竹,、“法无定法,自有我法,无法而法”, -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (744 bytes) () 07/18/2010 postreply 18:02:16

由于人们的从众心理,使得空间旋转对称性,这样一个连续对称性,在这里自发破缺了。这就使得,在人群中激发“抬头粒子”称为轻而易举的事 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (7745 bytes) () 07/18/2010 postreply 18:51:43

所以當光從地球的引力場往上走,它失去能量,因而其頻率下降(這表明兩個波峰之間的時間間隔變大),因此,從在上面的某個人來看,下麵發 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (421 bytes) () 07/18/2010 postreply 18:57:02

卢昌海 内部空间的对称性:波函数能够在更高维的空间 - 即我们称为内部空间的空间 - 中旋转 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (6533 bytes) () 07/18/2010 postreply 20:18:33

量子力学基本原理中粒子内部状态不可能通过干涉测量的原理 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1747 bytes) () 07/18/2010 postreply 20:45:48

“历史之梯”的对称,就是连续对称现象 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (4010 bytes) () 07/19/2010 postreply 15:10:58

我们就不仅要知道物质场在那上面的运动状态,还要知道这个圆柱面被扭曲的程度 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (2706 bytes) () 07/19/2010 postreply 15:15:09

将夸克两两分组, 每组称为一代)夸克, 那么它们的混合就可以导致 CP 对称性的破缺 -marketreflections- 给 marketreflections 发送悄悄话 marketreflections 的博客首页 (1956 bytes) () 07/18/2010 postreply 20:39:05

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