更差的

Compared with other algorithm differential evolution is very useful because of its easy implementation and less control parameter, so it is a new method for sintering burdening optimization.

相比于其他的优化算法寻优能力更强，由于差分进化算法容易实现，控制参数少，是一种比较实用的计算方法。

Elementary discussion on ventilation mode of the power house of hydropower station in river channel;2. According to the State Standard of Indoor Air Quality GB/T18883-2002,the air pollutants in the passenger car cabin were measured,and the influence of temperature,the type of car,the time since the manufacture date and the ventilation mode on the air quality was evaluated.

5倍；车内污染物的质量浓度随时间延长不断衰减，约10 d后趋于稳定；发动机运转时客车内污染物质量浓度升高，车内的空气质量变差；自然通风与循环通风均可使车内污染物质量浓度迅速下降，但自然通风方式效果更好。

More importantly, difference equations also appear in the study of discretization methods for differential equations.

更重要地，在对微分方程的离散化方法的研究中也出现了差分方程。

In this paper,we present a kind of symmetric modified finite volume element method for nonlinear parabolic problems,and give the optimal order energy norm error estimates for full discrete schemes.

本文对一类非线性抛物型方程提出对称修正有限体积元方法，给出能量模最优阶误差估计，并证明了对称修正有限体积元方法的解与一般有限体积元方法的解之差是一个更高阶项。

The result showed that the effect on soil fertility quality not notability; the effect on the flue-tobacco yield have notable different under different green manure, and wheat 、cabbage and cole higher than CK, horsebean is lowest. Planting green manure can ameliorated quality, and cole treatment was more harmony in chemic component, and than was cabbage.

本试验结果表明，在一年种植的基础上，种植绿肥对植烟土壤肥力影响有限；烟叶产量方面种植小麦、白菜、油菜好于对照，蚕豆最差；质量方面种植绿肥可以在一定程度上改善化学成分协调性，有提高烟叶品质趋势，其中以油菜处理的化学成分协调性更好，白菜次之，而蚕豆和小麦一般。

Rank of library week road is low, road condition is poor, and the standard that highway of river of edge of part of river of elegant rice huller is substandard class more, traffic is extremely disadvantageous, and transportation of short-term and inland road has big improvement not quite actual.

库周道路等级低，路况差，而雅砻江部分沿江公路更是等外级的标准，交通极其不便，且短期内陆路交通有大的改善不太现实。

Football is a ball, the poor and irreparably, increased the heart of a kind of desire and passion.

足球这种突发性的意外，往往只是一球之差而无可挽回，便更增加了心底的一种渴望和激情。

In order to the conservation and utilization of this wasp, laboratory studies were conducted to assess the population dynamics of them and effectiveness of the long-winged parasitoid wasps, T. elegans for suppressing populations of S. oryzae using methods for single element variance analysis and LSD multiple comparisons.

为了更好地保护和利用该蜂，采用单因子方差分析和LSD多重比较，在实验室内研究了雅脊金小蜂和米象的种群数量动态，以及该蜂长翅型雌蜂对米象种群的控制作用。

The results showed that the virus isolation and identification could generate considerably reliable results but the procedure was complicated and costed long time; microtomy fluorescent antibody detection was fast, but the specificity was low and needed to exclude the false positive from the results. Sandwich ELISA detection combined the merits of the former two methods, but it generated the false negative results when the samples were in bad preservation. Compared with the others, RT-PCR was fast, high sensitive and especially useful for detecting the CSFV directly from the samples. The specificity could be raised by using the nested-PCR to detect the CSFV from the simples, especially when the simples were in bad preservation.

结果显示，病毒分离鉴定法准确性较高，诊断比较容易，但存在试验步骤繁琐，所需时间长的缺点；荧光抗体检测法所需时间较短，但需要经验比较丰富人员来判定结果，且存在假阳性结果，特异性比较差；RT-PCR检测法具有快速、敏感等优点，特别是样品保存不理想时更有价值，利用套式PCR可以提高检测的特异性；夹心ELISA检测法具有快速、敏感等优点，但在样品保存不理想时会出现假阴性结果。

The soil urease and invertase activity effected by Hg was investigated in different fertility soils. The results show that soil urease activity、maximum reaction velocity (Vmax、Vmax/Km) and reaction velocity constant k have remarkably negative correlation with Hg concentration so that these can be used as ecological indexes of soil polluted by Hg, Km changes a little indicating that the reaction mechanism of Hg and urease is nonreversible competitive restraint. Urease of low soil fertility is more damaged by Hg than that of high soil fertility, with severe pollution at Hg concentration of 6.00 and 14.79mg/kg respectively; while invertase is less sensitive to Hg than urease. Cultural time has less influence on the relationship of soil enzyme and Hg concentration.

对不同肥力土壤脲酶和转化酶活性受汞影响进行了研究，结果显示，土壤脲酶活性、最大反应速度Vmax 、Vmax/Km和反应速度常数k与汞浓度呈现显著或极显著负相关关系，表明其可作为土壤汞污染的生态指标；米氏常数Km则变化较小，表明汞与脲酶作用机理为不可逆竞争抑制；低肥力土壤脲酶比高肥力土壤脲酶受汞毒害作用更强，当汞浓度分别为6.00和14.79mg/kg时即达到严重污染；而转化酶对汞的敏感性较差；培养时间对土壤酶与汞浓度间关系影响较小。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。