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(1)编写一个M文件,画出下列分段函数所表示的曲面。 0.54e075x-375y2-15y

0.1 Overview of intersection problems 10.2 Intersection problem classification 10. 2. 1 Classification by dimension 10.2.2 Classification by type of geometr 10.2.3 Classification by number system 10.3 Point /point\intersection

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20.1 Geodesics .... 20.1.1 Motivation 20.1.2 Definition ..:. 20.1.3 Governing equations 20.1.4 Two-point boundary value problem 20.1.5 Example 20.2 Developable surface

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10、设a、b、C、d、m、n均为int型变量,且a=5、b=6、c=1、d=2 m=2、n=3,则执行m=(d>c)&&(n=a>b)后n的值为 14、能正确表达数学关系|a-10&8a-10&&a-10la<10

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用磁控溅射镀膜方法，制成了巨磁电阻自族间多层膜Ta/NiFe/Cu/NiFe/FeMn/Ta.它具有优良的特性.其室温磁电阻比率MR＞2%，自由层矫顽力Hc1<160A/m，自由层零磁场漂Hf<800A/m和钉扎层交换场Hex≈20×103 A/m.作为新型磁功能材料，它满足高灵敏磁性传感器和硬盘读出头的要求.对多层膜制备的方法也作了系统研究，并讨论了缓冲层和钉扎层的制备工艺和微结构对磁性能的影响