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The preparation method is characterized in that:(1) at minus 10 DEG C to 10 DEG C, a chloroauric acid solution with a certain concentration is added into a nano-Pt/C catalyst by ultrasonic or stirring mixture and the atomic ratio of Pt to Au is controlled between 18:1 and 5:1;(2) a small amount of monohydric alcohol or dihydric alcohol or trihydric alcohol of C1-C3 is added and is stirred at minus 10 DEG C to 10 DEG C for 10 min to 5h, so as to prepare the carbon-loading Pt-Au bimetallic nano electro-catalyst;(3) if necessary, the catalyst obtained by the step (2) is treated for 0.5 to 4h at high temperature ranging from 100 DEG C to 700 DEG C in the inert or reducing atmosphere, so as to adjust and control the grain size of the Pt-Au bimetallic nano electro-catalyst.

本发明涉及了一种高稳定性碳载Pt-Au双金属纳米电催化剂的制备方法，其特征在于：(1)在-10～10℃中，将一定浓度氯金酸溶液加入到纳米Pt/C催化剂中经超声或搅拌混合，控制Pt∶Au的原子比为18∶1-5∶1；(2)添加少量C 1 -C 3 的一元、二元或三元醇类，在-10～10℃下搅拌10min-5h，制备了碳载铂金双金属纳米电催化剂；(3)视需要，可将步骤(2)得到的催化剂在惰性气氛或还原气氛中经100～700℃高温处理0.5-4h，可调控Pt-Au/C双金属纳米催化剂的粒径。

Recently, with the implement of Open Policy and the development of socialist market economy, especially the quick step of Citification, a number of In-migrants swarm into the cities so that cause many social problems, which, in particular ,the criminal problems rise more and more social attention.

近年来，随着改革开放的深入和社会主义市场经济的发展，特别是城市化进程的加快，大量外来人口流入城市，引发了许多社会问题，其中外来人口犯罪问题尤为突出，引起了越来越多的社会关注。

The bone resection was divided into four steps via FLA:① drilling of the jugular tuberculum;② partial mastoidectomy;③ removal of the occipital condyle;④resection of the lateral mass of C1 with mobilization of the vertebral artery. After each step of the bone resection was completed, the exposed area of the central clival depression and the area of exposure 15 cm above the central point were calculated.

利用CT和立体定向仪对20例甲醛溶液固定的头颅标本标记斜坡中央凹陷区中心点，采用FLA入路，骨切除分四步进行：磨除颈静脉结节，部分乳突切除，枕髁全切，C1侧块切除；分别于每一步骨切除及血管神经牵拉完成后测量斜坡中央凹陷区的显露范围和位于中心点上方15 cm处术者的操作范围。

Methods Central point at the central clival depression was marked with the help of CT and stereotactic apparatus in 20 formalin-fixed cadaveric heads. The bone resection was divided into four steps via FLA:① drilling of the jugular tuberculum;② partial mastoidectomy;③ removal of the occipital condyle;④resection of the lateral mass of C1 with mobilization of the vertebral artery. After each step of the bone resection was completed, the exposed area of the central clival depression and the area of exposure 15 cm above the central point were calculated.

利用CT和立体定向仪对20例甲醛溶液固定的头颅标本标记斜坡中央凹陷区中心点，采用FLA入路，骨切除分四步进行：磨除颈静脉结节，部分乳突切除，枕髁全切，C1侧块切除；分别于每一步骨切除及血管神经牵拉完成后测量斜坡中央凹陷区的显露范围和位于中心点上方15 cm处术者的操作范围。

In Chapter Six,we translate the equation of the iterative step of nonsmooth Newton-type method for nonlinear SDP into the conversional linear equations by the tensor technique. By using the equivalency conditions in Chapter Five, we establish the local convergence of this method.

在第六章中，我们通过张量技术把非线性半定规划问题的非光滑牛顿型法迭代步方程转化为一般的线性方程组，并利用第五章中的等价性结论分析了这种方法的局部二次收敛性。

"Sharply lower mortgageratesare still failing to convince peo-ple to step back into the housing market,"said Dimitry Fleming, e-conomist at ING.

荷兰国际集团经济学家迪米特里·弗莱明表示，抵押贷款利率急剧下降，仍未能使人们返回房地产市场。

It divided into two steps to prepare cryolite from fluosilicic acid, in the second step, cryolite is manufactured through the reaction of the ammonium fluoride solution with the sodium sulfate and the aluminum sulfate.

氟硅酸制取冰晶石分两步进行，第二步用得到的氟化铵溶液与硫酸钠和硫酸铝反应制冰晶石。

At Fouth Step we can tune into "divine power" at any time.

在第四个阶段中，我们可以随时将频率与&神圣力量&调整为一致。

Antimony samples were dissolved by aqua regia, hydrobromic acid, and hydrochloric acid step wisely, converting sulfur in the samples into sulfate.

方法采用王水，氢溴酸，浓HCl等试剂将锑样溶解，并使锑样中的硫转化为SO42-，低温加热蒸干，使锑完全挥发。

Bipolar II Disorder involves Major Depressive Episodes and Hypomanic Episodes. Since a significant portion of those suffering manic depression did not have full manic episodes, the classification was divided into Bipolar I and Bipolar II. However, Bipolar II is often a first step to Bipolar I. Over 5 years, between 5% and 15% of those will Bipolar II will change diagnosis to Bipolar I. Approximately 0.5% of people will develop Bipolar II in their lifetimes.

双极性二型包含重度忧郁症和轻躁症的症状由於有一大部份的躁郁症病人并没有完全的躁症症状，所以躁郁症要分为双极性一型和双极性二型然而，双极性二型常是双极性一型的第一步，经过五年，5% and 15%的双极性二型的病人会转变成双极性一型双极性二型的终生致病率大约为0.5

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。