查询词典 minimum covering

The minimum fluidization velocity has a minimum value when the frequency of sound waves is 120Hz and it will decrease as the sound pressure level increases. The degree of sound attenuation will increase while bed material is higher and the fluidization quality of fine particles will become poor and the minimum fluidization velocity will increase. Compared with TiO2, the SiO2 fine particles have a better quality of fluidization at the same fluidized conditions.The cluster/subcluster model and oscillators model are used to describe the fluidization characteristics of fine particles in a sound-assisted fluidized bed. The theoretical calculations show that the minimum fluidization velocity umf is decreased with the SPL increased at the same frequency of sound and the quality of fluidization is better.

论文还系统的考察了声压和频率对纳米SiO2和TiO2颗粒流化特性的影响，结果表明：在频率一定的情况下，声压越高，流化床中形成的聚团尺寸越小，最小流化速度越低，流化质量越好；当声压低于120dB时，声场对超细颗粒流化特性的影响减小，当声压大于130dB时，则能显著改善流化效果，使流化床内的颗粒聚团明显减小，最小流化速度明显降低，粉体带出减小；声压一定，频率为120Hz左右时，最小流化速度最低，此时流化床中形成的聚团尺寸最小，流化效果最好；超细颗粒达到较好的流化状态存在一个最佳频率范围，随着声压增高，这个频率范围将增大。

Finally, the condition examining and schema decomposition algorithm are given.Fourthly, The definitions of elementary merge dependency set and minimum elementary merge dependency set are put forward. The weak leftside conflict and weak rightside conflict in the minimum elementary merge dependency set are defined. The conclusion that when the minimum elementary merge dependency set has weak left side conflicts or weak right side conflict is reached, The decomposition meeting PEK isα-cyclic is given. The algorithms of calculating the minimum elementary merge dependency set and examining the conflicts are given.

给出了条件的判定算法和数据库模式的分解算法。4、提出初等归并依赖集和初等最小归并依赖集的概念，定义初等最小规并依赖集的弱左部冲突和弱右部冲突，讨论了初等最小归并依赖集下的冲突问题，给出了在FD集F其初等最小归并依赖集D中存在弱左，右部冲突时模式分解为满足PEK为有α环的结论，并给出了初等最小归并依赖集的求解方法，冲突的判定算法。

In this period of time, the mean annual air/ground temperature, mean annual maximum and minimum air/ground temperature, extreme maximum and minimum air/ground temperature, difference between ground-and air temperature, and annual accumulated temperature in the area all had an increasing trend, and the increase of mean annual air temperature, mean annual ground temperature, difference between ground-and air temperature, mean annual minimum air temperature, extreme maximum ground temperature, and extreme minimum ground temperature was more obvious, being 0.32℃, 0.59℃, 0.27℃, 0.39℃, 2.03℃, 1.62℃ per 10 years, respectively.

结果表明：26年来，林区热因子（平均气温、平均地温、平均最高／最低气温、平均最高／最低地温、极端最高／最低气温、极端最高／最低地温、地气温差、年积温）均呈上升趋势，其中平均气温、平均地温、地气温差、平均最低气温和极端最高／最低地温升高趋势明显，每10年分别增加0.32℃、0.59℃、0.27℃、0.39℃、2.03℃、1.62℃，最低温度的升高趋势都大于最高温度的增长速率，说明尖峰岭热带山地雨林区气候变暖来自于最低温度升高的贡献。

In chapter 2, we prove that sn—first countable spaces are preserved by the finite subsequence-covering mappings.By this result, we prove that the finite subsequence-covering, quotient mappings preserve g—metrizable spaces, also prove that the finite subsequence-covering, closed mappings preserve sn—metrizable spaces, g-metrizable spaces, metrizable spaces, point-countable bases.

在第二章中，我们主要证明了有限子序列覆盖映射保持sn-第一可数空间，作为它的应用，又证明了有限子序列覆盖、商映射保持g-第一可数空间，也证明了有限子序列覆盖闭映射保持sn-度量空间，g-度量空间，度量空间，点可数基。

The questions covering pre-algebra and elementary algebra make up the Pre-Algebra/Elementary Algebra Sub score. The questions covering intermediate algebra and coordinate geometry make up the Intermediate Algebra/Coordinate Geometry sub score. The questions covering plane geometry and trigonometry make up the Plane Geometry/Trigonometry sub score.

包含有基础初等代数和初等代数的考题构成了基础初等代数/初等代数的技能分数，涉及到中等代数和坐标几何的考题构成了中等代数/坐标几何的技能分数，而涵盖平面几何和三角函数的考题则构成了平面几何/三角函数的技能分数。

The main provinces are the Boreal, which coves all of the north temperate; the Neotropical, covering tropical Central and South America; the Paleotropical, covering tropical Africa and Asia; the Australian; the Cape Province, covering a small area around the Cape of Good Hope; and the Antarctic, including New Zealand and temperate South America.

主要的植物区包括：泛北极植物区，覆盖了所有的北温带；新热带植物区，覆盖热带中部和南美洲；旧热带植物区，覆盖非洲热带和亚洲；澳洲植物区；好望角植物区，覆盖好望角周围的一个较小的区；南极植物区，包括新西兰和南美温带。

In 1938 the Italian armed forces are divided into 3 theatres, one covering our recently expanded Italian East Africa, one covering Libya and one covering Italy proper.

1938年的意大利军队被分为三个战区，一个在我们最近扩张得到的意属东非，一个负责利比亚以及罗得岛周围，另一个则控制意大利本土。

Network; Polynomial algorithm; Balanced degree; Minimum balanced degree spanning tree; Minimum balanced degree point; Max-min spanning arborescence; Minimum ratio spanning arborescence

论文导师谢政，论文学位硕士，论文专业应用数学论文单位国防科学技术大学，点击次数 22，论文页数 47页File Size1657k

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In a method for retrieving sequences having a minimum PAPR in an OFDM (orthogonal frequency division multiplexing) system, by using characteristics in which all sequences of the OFDM system are classified into cosets having the same PAPR, PAPRs of sequences in which early two elements are fixed as '0' are calculated. A sequence having a minimum PAPR is selected from among the calculated PAPRs, and sequences allocated to the coset in which the selected sequence is included are retrieved as sequences having the minimum PAPR.

在一种用于在OFDM通信系统中恢复具有最低PAPR的序列的方法中，通过利用在其中将OFDM系统的所有序列分成具有相同PAPR的同余类序列的特性，计算两个开始项被固定为"0"的序列的PAPR，在所计算的PAPR中选择具有最小PAPR的序列，并且恢复分配至在其中包含所选同余类序列的序列作为具有最小PAPR的序列。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。