📄 第二章.htm
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</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">表数精度：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2<SUP>-23<o:p></o:p></SUP></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 10.5pt"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">6)
</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">表数效率：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">99.6%<o:p></o:p></SPAN></P>
<P class=MsoNormal><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312"><o:p> </o:p></SPAN></B></P>
<P class=MsoNormal><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2.5
</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">解：</SPAN></B><B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal
style="MARGIN-LEFT: 10.5pt"><!--[if gte vml 1]><o:wrapblock><v:shapetype
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joinstyle = "miter"></v:stroke><v:formulas><v:f eqn =
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"prod @3 21600 pixelWidth "></v:f><v:f eqn =
"prod @3 21600 pixelHeight "></v:f><v:f eqn = "sum @0 0 1 "></v:f><v:f eqn =
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"sum @8 21600 0 "></v:f><v:f eqn = "prod @7 21600 pixelHeight "></v:f><v:f eqn =
"sum @10 21600 0 "></v:f></v:formulas><v:path o:extrusionok = "f"
gradientshapeok = "t" o:connecttype = "rect"></v:path><o:lock aspectratio="t"
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style="MARGIN-TOP: 0px; Z-INDEX: 1; LEFT: 0px; MARGIN-LEFT: 162pt; WIDTH: 128pt; POSITION: absolute; HEIGHT: 29pt; TEXT-ALIGN: left"
type = "#_x0000_t75" coordsize = "21600,21600" o:allowincell = "f"><v:imagedata
o:title="" src = "da2.files/image001.wmz"></v:imagedata><w:wrap type =
"topandbottom"></w:wrap></v:shape><![if gte mso 9]><o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_s1026" DrawAspect="Content" ObjectID="_1133368177"> </o:OLEObject> <![endif]><![endif]--><![if !vml]><span style='mso-ignore:vglayout'> <table cellpadding=0 cellspacing=0> <tr> <td width=216 height=0></td> </tr> <tr> <td></td> <td><img width=171 height=39 src="da2.files/image002.gif" v:shapes="_x0000_s1026"></td> </tr> </table> </span><![endif]><!--[if gte vml 1]></o:wrapblock><![endif]--><BR
style="mso-ignore: vglayout" clear=all><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">1)
</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">设计<SPAN
class=GramE>浮</SPAN>点数的格式：</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2<SUP>-P</SUP>=10<SUP>-7..2</SUP><SPAN
style="mso-spacerun: yes"> </SPAN>P=</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">－</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">log<SUB>2</SUB>
10 <B style="mso-bidi-font-weight: normal"><SUP>-7.2</SUP></B>=7.2</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">×</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">log<SUB>2</SUB>
<SUP>10<o:p></o:p></SUP></SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 21.25pt"><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">尾数为</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">24</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">位，<SPAN
class=GramE>阶码为</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">7+1</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">位。</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 10.5pt"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2)
</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">计算：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 33.25pt; TEXT-INDENT: -12pt; mso-list: l2 level1 lfo6; tab-stops: list 33.25pt"><![if !supportLists]><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 楷体_GB2312"><SPAN
style="mso-list: Ignore">①<SPAN
style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">最大正数：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2<SUP>128
</SUP>= 3.4</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">×</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">10<SUP>38</SUP>
<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 33.25pt; TEXT-INDENT: -12pt; mso-list: l2 level1 lfo6; tab-stops: list 33.25pt"><![if !supportLists]><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 楷体_GB2312"><SPAN
style="mso-list: Ignore">②<SPAN
style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">最大负数：－</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2<SUP>-127</SUP></SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">×</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2<SUP>24</SUP></SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">＝－</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">3.5</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">×</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">10<SUP>-46</SUP><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 33.25pt; TEXT-INDENT: -12pt; mso-list: l2 level1 lfo6; tab-stops: list 33.25pt"><![if !supportLists]><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 楷体_GB2312"><SPAN
style="mso-list: Ignore">③<SPAN
style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">表数精度：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">1/2</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">×</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2<SUP>-23</SUP></SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">＝</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2<SUP>-24</SUP></SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">＝</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">10<SUP>-7..22</SUP><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 33.25pt; TEXT-INDENT: -12pt; mso-list: l2 level1 lfo6; tab-stops: list 33.25pt"><![if !supportLists]><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 楷体_GB2312"><SPAN
style="mso-list: Ignore">④<SPAN
style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">表数效率：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">50%<o:p></o:p></SPAN></P>
<P class=MsoNormal><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312"><o:p> </o:p></SPAN></B></P>
<P class=MsoNormal><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">2.6
</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">解：</SPAN></B><B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal
style="MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; mso-list: l7 level1 lfo8; tab-stops: list 18.0pt"><![if !supportLists]><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 'Times New Roman'"><SPAN
style="mso-list: Ignore">1)<SPAN
style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><![endif]><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">0.2</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">的两种表示：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">IBM</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">：</SPAN><SPAN
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">
<SPAN style="mso-spacerun: yes"> </SPAN><SPAN lang=EN-US>0 <SPAN
style="BACKGROUND: #d9d9d9; mso-shading: white; mso-pattern: gray-15 auto">000
0000</SPAN> <U>0011 <SPAN class=SpellE>0011</SPAN> <SPAN
class=SpellE>0011</SPAN> <SPAN class=SpellE>0011</SPAN> <SPAN
class=SpellE>0011</SPAN> <SPAN
class=SpellE>0011</SPAN></U><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN lang=EN-US
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">IEEE</SPAN><SPAN
style="FONT-SIZE: 15pt; FONT-FAMILY: 楷体_GB2312; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'">：</SPAN><SPAN
style="FONT-SIZE: 15pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 楷体_GB2312">
<SPAN lang=EN-US>0 <SPAN
style="BACKGROUND: #d9d9d9; mso-shading: white; mso-pattern: gray-15 auto">01111101</SPAN>
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