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The second problem posed when considering catastrophism is the earth's past impact history.

当用灾变论来解释过去的地球被撞击历史时，第二个问题就出现了。

In this paper, we consider a Cauchy problem for the Laplace equation, which is a classical example of ill-posed problem.

众所周知， Laplace方程的Cauchy问题是不适定的，但这类问题在工程实践中有许多应用。

The Cauchy problem is well posed when the Sobolev exponents for the initial data is higher than a critical value.

证明了当初值的Sobolev正则性高于一临界值时，柯西问题是适定的，否则其是不适定的。

The small safety risk posed by lithium cobalt oxide is manageable in small devices but makes the material not viable for the larger batteries needed to run hybrid cars, Ceder said. Cobalt is also fairly

镍钴氧化物在小型电子设备中的危险是比较小的，也可以被适当地处理掉，但这意味着它不适合构成可驱动混合动力汽车的大型电池，希德教授说道，此外，钴也是比较昂贵的一种材料。

The results show that during bioleaching the chalcocite decom posed by two stages, the stageⅠis controlled by the concentration of ferric, with the increase of ferric concentration the oxidation rate of chalcocite is enhanced. The rate of stageⅡis slower than that of the stageⅠand it acts as the confining stage, and the concentration ratio of ferric to ferrous influences the oxidation rate at this stage.

计算与实验结果表明：模型仿真结果与实际结果较符合；堆浸过程次生硫化铜矿的氧化分为2个阶段，其中，辉铜矿反应步骤Ⅰ受溶液Fe3+浓度控制，随着Fe3+浓度增加，反应速率加快；反应步骤Ⅱ较反应步骤Ⅰ慢，为浸出反应的限制性步骤， Fe3+与Fe2+的浓度比是影响该反应步骤的关键因素。

The government is now so concerned about the threat posed by China's cyber warriors that it has established a Cyber Security Operations Centre at the GCHQ listening centre in Cheltenham.

英国政府现在非常关心中国网络战士带来的威胁，他们在切尔滕纳姆国家通信总局收听中心建立了一个网络安全控制中心。

Even though it was posed civilly enough, the question infuriated me. I proceeded to tell him everything that had happened: how his son had no respect for him and didn't trust him.

虽然他问的时候非常有礼貌，我听的却是一肚子恼火，我将所有发生的事情全部告诉了他，我还告诉他，他的孩子根本就看不起他，也不信任他。

With respect to the frequently-occurring zone and some relative concentration regions within the zone of meso-scale systems, a new point of view is posed by case study. It′s pointed out that the zone basically corresponds to meiyu front and its accompanying cloud and rain belt, or so-called warm and moisture tongue and LLJ etc.

4对中尺度系统的多发带及带上的相对集中区，利用个例分析提出了新的看法，指出，前者与通常的梅雨锋云雨带，高温高湿带以及LLJ等基本相一致。

By using the sigular system theory of compact operator, a new regularizing filter and a new regularization method for solving ill-posed problems are established.

根据紧算子的奇异系统理论，提出了一种新的正则化子，进而建立了一类新的求解病态问题的正则化方法。

The basic idea of Tikhonov regularization is that linear compact operator equation of the first kind is replaced by the minimization problem of Tikhonov functional, the paper demonstrates the minimization of Tikhonov functional is an well-posed problem. In the end, the paper suggests a new type of iterative algorithm to solve inverse problems of parameter identification for one-dimension parabolic partial differential equation .

本文论证了Tikhonov泛函极小化问题是适定的，即满足西安理工大学硕士学位论文解的存在性、解的唯一性和解连续依赖于数据的稳定性：并且此极小化问题等价丁求解第一类方程的正规方程。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。