According to the tested mechanical performance of coal sample, the plastic softening process of stress-strain curve is thought to be about a cubic curve, and the plastic softening theory about coal layer is used to deduce the inflection equation of roof.

By structure the bounded cubic systems in the plane, we prove that: 1) the system ( 1) have distribution of critical point with 5-4 ( 5 critical points with index+ 1 and 4 critical points with index-1), 3-2,2-1,+ 1;

通过构造有界的平面三次系统，证实了（1）其有限奇点的5-4（5个奇点指标为+1，另4个奇点指标为-1）、3-2、2-1、+1四种分布均可实现；

Abstract In this paper, the global topological classifications for homogeneous cubic system in the plane with common factor are discussed, and their coefficient conditions are given.

讨论了具有公因式的平面齐三次系统全局结构的拓扑分类，并给出了它们的系数条件。

The pencil of plane quadratic lines is the foundation for studying plane cubic curve and hig-her plane curves.

平面二次线束是研究平面三次代数曲线和高次曲线的基础。

Topological Classifications of Global Structures and Their Coefficient Conditions for Homogeneous Cubic System in the Plane with Common Factor

具有公因式的平面齐三次系统全局结构的拓扑分类及系数条件

On the distribution of finity critical points of bounded cubic systems in the plane

平面有界三次系统有限奇点分布举例

The mean simulation precision of cubic tendency plane model is 93 01%, while the mean forecast precision of 20 groups of sample prepared in advance is 93 24%.

而三次趋势面模型的平均模拟精度为93.01%，预留的20组样本的平均预测精度为93.24%。

Design of the fifth cubic plane landscape in residential areas in city

浅谈城市住区第五立面景观设计

Cubic capacity of holds including hatches calibrated measuring [ volumetric] tank

包括舱口在内的舱容校准测量[容积计量]容器

Study on Standard Error of Cubic Capacity of Soil and Rock Measure

土石方计量标准的误差研究

Automatic Tabled Inquire and Calculation System of Cubic Capacity for Upright Metal Tank in Computer

立式金属油罐容积编表计算机自动查询与计算系统

The following aspects are introduced for automatic tabled inquire and calculation system of cubic capacity for upright metal tank in computer, they are design idea, principle of inquire and calculation, function and practice, programming and adjustment, application and testing, and etc.

介绍了立式金属油罐容积编表计算机自动查询与计算系统的设计思想、查询计算原理、功能及实现、程序的编制及调试、应用及测试等。

Experimental measurement and study of Raman spectra for pure ethanol and 50% ethanol aqueous solution has been ( conducted) at ambient temperature and the pressures of 0.1-900 MPa by using Cubic Zirconia anvil cell.

在24℃和0.1~900MPa压力下测量了含50%水的乙醇溶液和纯乙醇的激光拉曼光谱。

By introducing the lattice theory and considering a cubic unit cell, the water permeability of concrete is obtained for several lattice arrangements of aggregates, which indicates that the arrangement of aggregates is an important factor that affects the water permeability of concrete.

引入晶格理论，取立方体单元胞，求解混凝土骨料几种不同规则排列下的混凝土相对水渗透系数，计算结果表明骨料排列是影响混凝土水渗透系数的重要因素。

By assumption of periodical distribution of uniformed particles in size and shape, both hexagonal and cubic cell models were constructed to study mechanical properties of particle-reinforced composites by using three-dimensional finite element method.

利用三维有限元方法，通过建立立方体、六棱柱单位胞体数值分析模型，对颗粒增强复合材料做模拟计算。

Computer Simulation for the Precipitation Mechanism of the Cubic Alloy Including Coherent Strain Energy

包含共格畸变的立方合金沉淀机制的计算机模拟

They also contain about six grams of sugar per cube, and come in three different flavors-pure drip, latte, and mocha.

每块咖啡中也含有大约6克的砂糖。咖啡块有三种口味：滴滤、拿铁和抹茶。

" You can harvest enough electricity to power a cell phone battery for about four days from a sugar cube," researcher Derek lovley says.

“从一块糖中你就可以获得足以使手机电池待机4天的电量，”研究人员德里克，洛弗利说。

With this density, all the information of the US Congress Library can be stored in a disc with the size of a sugar cube.

按照这一密度，可将美国国会图书馆的所有信息存放在一块方糖大的盘上。

He is stupid enough to hide a sugar cube in a bucket of water.

他蠢得把一块方糖藏在一桶水里。

He felt it for some time, and then said, "Indeed, I am not sure whether it is a wolf's cub or a fox's: but this I know--it would never do to trust it in a sheepfold."

他用手摸了一会儿，然后说：“我不太确定，这到底是一只小狼崽，还是一只狐狸的幼崽，但是有一点我十分确定，千万别让它进羊圈。”