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Result: when distilled water and purified water was used as diluting water, no obvious difference of bod5 was found between them, and both the results reached the standard ( below 0.2 mg/l). deliquescent oxygen reduced with longer balance time and greater difference from standard occurred. before balancing,deliquescent oxygen was close to saturation. the results under 20 ℃ met the standard.

结果: 以蒸馏水和纯净水作为稀释水水源,其bod5都小于0.2 mg/l,均达到标准;平衡时间增长,当日溶解氧量趋于降低,与标准值的差值也逐渐增大,未经平衡的溶解氧量接近饱和;20 ℃时的测定结果达标。

We establish the denominate criterion, which makes the relic management and research work more scientific and exact

制定玺印类文物的定名标准,使文物管理和研究工作趋于规范、科学、精确,以此带动其他类文物管理工作的改进和提高

Amid the despondency, however, supply and demand are moving towards balance.

然而,在此令人失望的情况下,供需正趋于平衡。

In the single crystal of C60 with a FCC structure,positron mainly appears outside the C60 molecule.The main annihilation space is the interspace between molecules.The calculated positron bulk lifetime in C60 is 352ps, which agrees with experiment value of 356ps in literature.In carbon nanotube bundles with different dimeters,as the diameter of carbon nanotubes increases,the main space where positron appears changes from the interspace of carbon tubes to the space inside carbon tubes,the radio between positron annihilation with valence eletrons and core eletrons becomes larger,the positron bulk lifetime in carbon nanotube increase rapidly first and come to be a constant at the end.The calculated positron lifetime of carbon nanotube with a dimeter of 0.8~1.6ns is 332~470ps,which agrees with the experiment value of 394ps.Positron annihilation has been studied in widly used compound semiconductors.

计算结果表明:在片层结构的石墨晶体中,正电子主要在石墨层间的空隙中湮没,计算出的石墨中的正电子寿命为208 pS,与文献中的实验结果215 ps符合很好;在金刚石单晶中,正电子主要在碳原子之间的空隙中存在并发生湮没,计算出的金刚石中的正电子寿命为115 ps,文献中的实验结果110 ps左右符合;在面心立方结构的C60晶体中,正电子主要在C60分子球壳内外侧及分子之间存在,C60球形分子中心正电子分布很少,正电子的湮没区域集中在C60分子之间的空隙区域,计算出的C60中的正电子寿命为352 ps与文献中的实验结果356ps相符合;对于不同管径碳米管束中的正电子分布,随着碳纳米管直径的增加,碳纳米管束中的正电子由主要在碳纳米管管间的区域出现转变为主要在碳纳米管管内中心的区域出现:碳纳米管束中的正电子与碳原子的价电子的湮没概率变得越来越大,与核心电子的湮没概率变得越来越小;碳纳米管束中正电子的湮没寿命先迅速增大,而后趋于一定值。

The rates of the heteroploidy and aneuploidy rose gradually in the shift of benign- borderline-malignancy, and the same was true for the rat es of mortality/relapse as well as the contrast risk. The nature of ovarian tumors with heteroploidy was much malignant than that with diploidy.

在良性、交界性至恶性肿瘤系列中,异倍体率或非整倍体率明显增加,病死和复发率及相对危险性随之增高;异倍体肿瘤的性质较恶,2倍体肿瘤趋于良性。

A parallel algorithm for certain real symmetric block-tridiagonal linear systems on distributed-memory multicomputers is proposed. This algorithm is based on the block factorization of the coefficient matrix. This algorithm is used to solving the block-tridiagonal linear systems resulted from the finite difference approximation to Poisson's equation with Dirichlet boundary conditions. Then we get a parallel algorithm which speedup tends to linear speedup.

7研究了一类实对称块三对角线性方程组的分布式并行求解,提出了一种基于块矩阵分解的高效分布式并行算法,将其应用于求解带Dirichlet边界条件的Poisson方程导出的块三对角线性方程组,得到加速比趋于线性加速比的分布式并行算法,理论上说,这也是并行算法的理想情况。

Mr Vyugin said the best policy would be to move to a "dirty float" in which the central bank could intervene without warning so as to scare off speculators – and then the currency would stabilise.

丘金表示,最佳的政策应该是转向"肮脏浮动汇率制度",这样央行就可以在不预先通告的情况下进行干预,以便吓跑投机者——这样卢布汇率就将趋于稳定。

Soil microbial biomass and activities of invertase and urease all tended to decrease after pot-culture experiment, while the correlations between these biochemical properties and field ages were similar to those before this experiment, suggesting that rice cultivation without fertilization consumed part of soil microbial biomass, decreased soil enzyme activities correlated with C and N transformation, and affected soil nutrients status disadvantageously.

温室盆栽试验之后,水稻土的微生物生物量及酶活性与利用年限之间的关系规律和种植水稻之前基本一致,且整体上又趋于下降,即无施肥条件下种植水稻转化利用了土壤部分微生物生物量,并减弱了与碳氮转化相关酶的活性,对保持水稻土的营养水平造成不利影响。

Because they do disafforestation, opening up grasslands, reclaiming field from the intertidal zone, finally cause seriously ecology losing balance and destroying, forest decrement, soil erosion serious, climate worsing, desert broadening the scope, drought and flood harm frequently appearing, all these makes whole ecology going to worse and ...

因毁林开荒、开垦草原、围垦滩涂,结果导致生态平衡失调和破坏,造成森林减少、水土流失严重、气候恶化、沙漠化扩大,洪旱灾害频发,使整个生态环境趋于恶化,最终影响到人类自身的生存。本文列举了巴州地区土地开发的现状,分析了土地开发对生态环境造成的影响,并提出了生态环境保护对策与建议。

Disaggregation into separate streams tends to reduce locality, but its effect is only pronounced near clients.

列。分解成不同流趋于减少地方,但其效果是明显的只有附近的客户。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。