twice differentiable functions

A twice differentiable functions is studied.

研究了一类二次可微函数,利用二阶导数的上界和下界,给出了二次可微函数的O strow sk i型不等式,同时也推广了经典的中点不等式和梯形不等式。

Study on Secondary Seismic Acquisition in Southern Steep Zone in Biyang Depression;

泌阳凹陷南部陡坡带二次采集方法研究

Througn designing three axial slots in internal threaded portion and optimizing nib structure,a design was made on the injection mould with a two-step ejecting mechanism with non-rotating.

对笔尖内螺纹部分设计三段轴向开槽,优化笔尖结构,设计了二次推出不带旋转机构的自动脱螺纹注塑模。

Reheating Process for the Semi-solid A356 Alloy;

半固态A356合金的二次加热工艺研究

Detection of the Reheating State of Semisolid Hypoeutectic Al-Si Alloy;

半固态亚共晶铝硅合金二次加热状态检测

The effects of processing parameters of semi-solid billets preparation,reheating temperature and holding time on the semi-solid slurry microstructure of AlSi7MgBe alloy by liquidus semi-continuous casting were studied.

采用近液相线半连续铸造技术制备AlSi7MgBe合金半固态坯料,研究制坯工艺以及二次加热温度和保温时间对半固态浆料微观组织的影响,通过组织与性能分析对AlSi7MgBe合金的半固态触变成形性进行了研究。

The contact pattern of boiler auxiliary machinery was modified with the adoption of layer-by-layer coal charging technology,realizing secondary dedusting,improving the heat efficiency and reliability of boiler.

采用分层给煤技术,改造锅炉辅机连接方式,实现二次除尘,提高锅炉热效率和可靠性。

Appropriate choice of top draft hood type is a key point for the modification project of secondary dedusting of converter off-gas at Xingtai Steelmaking Plant.

正确选定顶吸罩类型是邢钢转炉二次除尘改造治理的关键。