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The possibility and preventive of Leptinotarsa decemLineata spreads into Heilongjiang province were discussed on the basis of its distribution and harmfulness, the geographic location of Heilongjiang province and agro-ecological conditions.

从马铃薯甲虫的地理分布危害特性和黑龙江省的农业生态条件等方面,探讨了访虫扩散入黑龙江省的可能险以及预防控制措施。

This study was therefore conducted in a small watershed of the loessial gully region to reveal the profile distribution of soil properties as affected by landforms.

论文研究了黄土高原沟壑区小流域地形条件对土壤性质剖面分布的影响,结果表明土壤硝态氮、速效磷、碱性磷酸酶和蔗糖酶为高度变异的土壤性质;pH值和过氧化氢酶为小变异土壤性质。

And with the increase of 〓 concentration, in 1999, the effect of the Yangtse river is dominant by rating to 65~85% of the whole in summer, and the following accounting to 10%~35% is that of the longshore flow from North Jiangsu Province and Taiwan Warm Current.

按1999年的计算条件,受长江来水氮浓度增高的影响,对夏季舟山海域〓分布的贡献中,长江来水贡献值增为65%~85%,背景值则减少为10%~35%,钱塘江来水贡献值小于5%;冬季长江来水贡献值为70%~80%,背景值为20%~30%。

The free radical scavenging effects of Meretrix meretrix hydrolysates prepared with papain,neutral protease and acid protease were investigated.

利用正交实验研究了文蛤蛋白分别经木瓜蛋白酶、中性蛋白酶、酸性蛋白酶作用后酶解物对羟自由基和超氧自由基的清除作用,优化了水解条件,并对最佳清除率下的三种酶解物进行SephadexG50凝胶柱分离,测定酶解物中抗氧化活性肽的分子量分布。

This paper describes the distribution of potentials and current densities and the chemical changes in the presence of cathodic protection,the mechanism of cathodic protection against crevice corrosion,the mechanism of microbiologically influenced corrosion of pipeline steel beneath disbonded coatings.

综述了在有阴极保护的条件时剥离涂层下缝隙内电位电流的分布和化学环境的变化、阴极保护防止缝隙腐蚀的机理、微生物腐蚀的机理以及前人提出的关于剥离涂层下微生物腐蚀与阴极保护相互作用的规律,并展望了对于解决剥离涂层下微生物腐蚀难题需进一步的实验研究

The lab findings show, the no-blemish copper deposition can be realized through selective copper deposition in trench. In the process of electro-plating, via and crevice come into being due to the misproportion of the current density inside and outside the trench.

在电镀的条件下,凹槽电镀铜产生空洞和缝隙原因是凹槽内外电流密度分布不均匀,使凹槽内外镀层生长速度不一致,最终导致空洞和缝隙形成。

Des Moul., Ajania Poljakov and their allies are still unresolved due to the restriction of plant materials and complicated geographic distribution.

由于研究材料、地理分布等条件的限制,菊属、亚菊属及其近缘属的属间关系未得到很好解决。

The multicycle tectonic evolution of Tarim craton controls the formation of superimposed the Tarim Basin,petroleum-geology conditions as well as the features of composite petroleum system ,thus determines hydrocarbon distribution and resources potential in the basin.

塔里木克拉通多旋回构造演化控制了塔里木叠合盆地的形成及石油地质条件和复合含油气系统特征,进而决定了油气的分布和资源潜力。

The basin experienced three basin-forming cycles of Neopaleozoic, Mesozoic and Cenozoic Eras. Mesozoic fault and depression compounding basin composed the northern margin Jurassic petroleum system and the Cenozoic large-scale strike-slip and compressional basins composed the Tertiary petroleum system of the western Qaidam basin and Quaternary petroleum system of Sanhu. The intense tectogenesis of Yanshan and Xishan made the Jurassic petroleum system of the northern Qaidam more complex. The monocycle paleoclimate evolution in Cenozoic Era and multi-tectonic movement made the lake-basin evolution, hydrocarbon source-rock, reservoir development, accumulation condition and petroleum distribution are more exceptive in character and complex in feature.

该盆地经历了晚古生代、中生代和新生代3个成盆旋回,中生代断坳复合盆地形成了柴达木盆地北缘侏罗系油气系统,新生代大型走滑挤压盆地形成了柴达木盆地西部第三系油气系统和三湖第四系天然气系统,燕山和喜山2期强烈构造运动使柴北缘侏罗系油气系统高度复杂化,新生代单旋回古气候演化与多期构造运动使湖盆演化、烃源岩和沉积储层发育特征、成藏条件与油气分布规律变得十分特殊和复杂。

Due to the violation of the PA condition, the distributions of Wald statistics and Score statistics based on GLS estimators are noncentral x~2 distributions. The efficiency of test based on the GEE mothod is infulenced.

由于PA条件不成立,回归系数的GLS估计不再是渐近无偏的,从而得到的Wald和Score统计量的分布不再是中心卡方分布拉,从而对于检验的效率也产生了一定的影响。

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推荐网络例句

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。

However, to get a true quote, you will need to provide detailed personal and financial information.

然而,要让一个真正的引用,你需要提供详细的个人和财务信息。