查询词典 Pr

We transformed RMgBr into R-Ti derivatives with the production of byproduct MgBrO~(i-Pr at the same time, but we didn\'t need romove the Mg salt by centrifugation or chelating reagents, for bis[2-(N,N-dimethylamino)ethyl] ether could chelate with Mg atom and thereby reduced the Louis acidity of Mg salt, so we used R-Ti derivatives produced in situ to alkylate the aldehydes induced by BINOL-Ti complexes..

我们通过利用TiO~(i-Pr_4使格氏试剂转化成烷基钛，同时产生具有亲核加成促进作用的副产物MgBrO~(i-Pr，由于BDMAEE能与MgBrO~(i--Pr络合降低其路易酸活性，所以不需要离心或者借助络合试剂完全除去镁盐，而使用原位生成的烷基钛在BINOL-Ti诱导下对醛进行不对称加成。

Pr has little effect on the magnetic properties of (Nd1-xPrx)9.4Fe75.6Ti4B10.5C0.5 ribbons, ribbons with Br between 0.86T and 0.90T, iHc about 1000kA/m, andmax between 130kJ/m3 and 136kJ/m3 are all achieved with different ratio of Nd and Pr following their optimal crystallization annealing, which implies that it is possible to prepare high performance, low rare earth content nanocomposite Di-Fe-Ti-B-C permanent alloys with didymium directly.

Pr对合金薄带磁性能影响不大，直接利用稀土矿的次级分离产物Di来制备高性能低稀土含量纳米复合Di-Fe-Ti-B-C永磁合金完全可行，制备出的合金剩磁Br在0.86T与0.90T之间，内禀矫顽力iHc在1000kA/m左右，最大磁能积max介于130kJ/m3与136kJ/m3之间。

In this paper, we reported the spectroscopic properties of praseodymium ions Pr(superscript 3+ doped transparent oxyfluoride glass ceramic excited with different laser lines, such as 532, 514.5 and 476.5um.

用不同的激发波长532，514.5，476.5nm，研究稀土Pr(上标 3+)掺杂的透明氟氧化物玻璃陶瓷中Pr(上标 3+)在LaF3微晶环境和玻璃环境中的不同的荧光行为。

The technique made full use of the characteristic of PR controller which can realize zero steady-state error in AC input signal in stationary frame. In the method, the active and reactive current component in the vector control strategy were transformed in the stationary frame to achieve the objective of keeping the DC-link voltage constant, adjusting the power factor and decoupling the active and reactive power. Compared with conventional double close-loop proportional integral controller, the PR technique is better in harmonic compensation without the complex rotating frame transformation and the couple or feedback voltage which is easily influenced by temperature and circuit parameters. The control algorithm is easy to be realized while the robustness and power quality is improved.

该方法充分利用了PR控制器能够在静止坐标系下对交流输入信号无静差控制的优势，将矢量控制策略下的有功电流和无功电流分量转换到静止坐标系下进行调节，实现网侧变换器维持直流电压稳定和调节功率因数的控制任务和双馈电机有功、无功功率的解耦控制，与传统的双闭环PI控制相比，该策略无需繁琐的坐标旋转变换，不存在受温度及电路参数影响的耦合项和前馈补偿项，且易于实现对系统低次谐波电流的补偿，减小了控制算法实现难度，提高了控制系统的鲁棒性和电网电能质量。

Magnetization measurements indicate that the Neel temperature for the Pr sublattice is 19.0K, which is 2K higher than the previously reported va...

磁测量显示Pr的反铁磁序温度为 19.0K ，比前人报导值高出 2K ，进一步证实样品中仅含有很少的Pr占据Ba位的缺陷。

Reviewing website of 7 years, my that half-dead station Www.20592.com expires because of the domain name overlooked add cost, this ought to be my fault, the birthday that connects it gives misremembered, be punished Google is PR value from 4 fell 2, other is worth twice with the PR of his station also from 3 fell 1, baidu is collected became inside a few days 1, without language ah how saying again also is a year of much painstaking effort, and return complicity other a few new stations!

回顾着07年的网站，我的那半死不活的站www.20592.com因为域名到期忘记了续费，这应当是我的错，连它的&生日&都给记错了，受到惩罚便Google是PR值从4降到了2，其它两个和他一起的站的PR值也从3降到了1，百度收录几天内变成了1，无语呀再怎么说也是一年多的心血，而且还连累了其它几个新站！

How to judge the PR that the other side hijacks, need the serious website that studies the other side, see a website collect how, link how to wait reversely will be judged omnibusly was to use a domain name to be hijacked so that the PR that come is worth, if be, that does not become such link.

如何判断对方是不是劫持的PR，需要认真的研究对方的网站，看看网站的收录如何，反向链接怎么样等来综合性的判断是不是采用了域名劫持得来的PR值，如果是，那就不要做这样的链接了。

The closest period of time everyday the snapshot circumstance of the website, website already a few months Baidu from collect experienced 10 days now half month updates snapshot to arrive 24 hours to update again to a week, update a few pages to update several much pages to from, arrive 24 hours from 24 hours of a few pages the snapshot of 200 much pages, this paragraph of time understands eventually, to Baidu snapshot should update ability 24 hours to be have weight, baidu did not use PR value to measure the weight of a website like Gu Ge, what does that use, I feel to return is the time that snapshot updates, the jump overing that a website updates in 24 hours has weight more more, because do not think what giving just is Baidu weight really, cannot use PR to see, of course this is pure belong to an individual close a point.

最近一段时间每天网站的快照情况，网站已经几个月了百度从收录到现在经历了十天半个月更新一次快照到一个星期再到24小时更新，从一次更新几页到一次更新数多页，从24小时几页到24小时200多页的快照，这段时间终于明白，对百度来说快照要24小时更新才算是有权重，百度没有像谷歌一样用PR值来衡量一个网站的权重，那用什么呢，我觉得还是快照更新的时间，一个网站在24小时更新的越多就越有权重，因为实在想不出什么才是百度权重，不能用PR一下看出来，当然这纯属个人的关点。

Because the author's forum does not have big website to be willing to recommend, look for a few Pr to be worth low website to undertake was linkinged so only with thickskinned, ah, just began to compare difficulty, because the website does not have PR value to also was not collected namely, general website does not wish to link, must hold to so, small website also is a website, many somes of link is many road, who knows reptile is met circuit climbs over from which.

因为笔者的论坛没有大网站愿意推荐，所以就只有厚着脸皮去找一些pr值低的网站进行链接了，呵呵，刚开始比较困难，因为网站即没有PR值也没有被收录，一般网站都不愿链接的，所以一定要坚持了，小网站也是网站，多一些链接就是多一条道路，谁知道爬虫会从哪个线路爬过来呢。

Modification caption to the website especially the website of tall Pr is very adverse, but the long-term rank that should make good website must mix the homepage the caption of each minutes of page has been done, accordingly, await in the begining advocate the rank of mainstream keyword Google of the station drops quickly from the 2nd page 150 the result that caption revises basically is beyond the name, and link of a large number of dead catenary of website itself, invalid friendship, rubbish friendship link, mix through Title, Meta picture Alt attribute, inside of catenary optimize, of the article update, oppose catenary and written language of the anchor that return chain through recommending site of guest of many forum, rich, tall Pr especially, today before the rank of mainstream keyword Google that All Souls'Day stands was entered 20, opposite before have promotion.

修改标题对于网站尤其是高pr的网站是非常不利的，但是要做好网站的长期排名就必须把主页和各分页的标题做好，因此，开始时候主站的主流关键词Google排名从第二页急剧下降到150名以外主要是标题修改的结果，以及网站本身的大量死链、无效友情链接、垃圾友情链接，通过title、meta和图片alt属性、内链的优化、文章的更新，尤其是通过引进大量的论坛、博客、高pr站点反链及反链锚文字，今天主站的主流关键词Google排名进入了前20名，并相对之前有提升。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。