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<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6279d393517cd20ea4e2f137/bg2.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0">1<span class="_ _0"></span>.<span class="_ _1"></span><span class="ff2 fs1 fc1 sc1">移动数据库系统</span></div><div class="t m0 x1 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0">2<span class="_ _0"></span>.<span class="_ _1"></span><span class="ff2 fs1 fc1 sc1">连锁超市分布式数<span class="_ _2"></span>据库系统</span></div><div class="t m0 x1 h3 y4 ff1 fs0 fc0 sc0 ls0 ws0">3<span class="_ _0"></span>.<span class="_ _1"></span><span class="ff2 fs1 fc1 sc1">火车订票分布式数<span class="_ _2"></span>据库系统</span></div><div class="t m0 x1 h3 y5 ff1 fs0 fc0 sc0 ls0 ws0">4.<span class="fs1 fc1">GSP<span class="_ _3"> </span><span class="ff2 sc1">药品管理分布式<span class="_ _2"></span>数据库系统</span></span></div><div class="t m0 x1 h3 y6 ff1 fs0 fc0 sc0 ls0 ws0">5<span class="_ _0"></span>.<span class="_ _1"></span><span class="ff2 fs1 fc1 sc1">银行管理分布式数<span class="_ _2"></span>据库系统</span></div><div class="t m0 x2 h4 y7 ff2 fs2 fc1 sc1 ls0 ws0">分布式数据库系统的主<span class="_ _4"></span>要应用</div><div class="t m0 x3 h4 y8 ff2 fs2 fc1 sc1 ls0 ws0"> <span class="_ _5"> </span><span class="sc0">第<span class="_ _6"> </span><span class="ff3">9<span class="_ _6"> </span></span></span>章</div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6279d393517cd20ea4e2f137/bg3.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x4 h5 y9 ff4 fs2 fc1 sc0 ls0 ws0">•</div><div class="t m0 x5 h4 ya ff2 fs2 fc1 sc0 ls0 ws0">应用需求是移动数据<span class="_ _4"></span>库技术发展的源动力</div><div class="t m0 x6 h6 yb ff4 fs1 fc1 sc0 ls0 ws0">–</div><div class="t m0 x7 h7 yc ff2 fs1 fc1 sc0 ls0 ws0">对人活动范围的<span class="_ _2"></span>扩展，不分地域<span class="_ _2"></span>和时间</div><div class="t m0 x6 h6 yd ff4 fs1 fc1 sc0 ls0 ws0">–</div><div class="t m0 x7 h7 ye ff2 fs1 fc1 sc0 ls0 ws0">商务领域的需求<span class="_ _2"></span>，移动商务</div><div class="t m0 x6 h6 yf ff4 fs1 fc1 sc0 ls0 ws0">–</div><div class="t m0 x7 h7 y10 ff2 fs1 fc1 sc0 ls0 ws0">数字化信息服务<span class="_ _2"></span>的发展，天气预<span class="_ _2"></span>报、交通信息</div><div class="t m0 x6 h6 y11 ff4 fs1 fc1 sc0 ls0 ws0">–</div><div class="t m0 x7 h7 y12 ff2 fs1 fc1 sc0 ls0 ws0">军事领域的特殊<span class="_ _2"></span>需求</div><div class="t m0 x4 h5 y13 ff4 fs2 fc1 sc0 ls0 ws0">•</div><div class="t m0 x5 h4 y14 ff2 fs2 fc1 sc0 ls0 ws0">通信、硬件技术及相<span class="_ _4"></span>应软件技术的发展为移</div><div class="t m0 x5 h4 y15 ff2 fs2 fc1 sc0 ls0 ws0">动数据库的产生提供<span class="_ _4"></span>了强有力的技术保障</div><div class="t m0 x6 h6 y16 ff4 fs1 fc1 sc0 ls0 ws0">–</div><div class="t m0 x7 h7 y17 ff2 fs1 fc1 sc0 ls0 ws0">无线通信技术的<span class="_ _2"></span>发展</div><div class="t m0 x6 h6 y18 ff4 fs1 fc1 sc0 ls0 ws0">–</div><div class="t m0 x7 h7 y19 ff2 fs1 fc1 sc0 ls0 ws0">硬件技术的发展</div><div class="t m0 x6 h6 y1a ff4 fs1 fc1 sc0 ls0 ws0">–</div><div class="t m0 x7 h7 y1b ff2 fs1 fc1 sc0 ls0 ws0">相应软件技术的<span class="_ _2"></span>发展</div><div class="t m0 x8 h8 y1c ff3 fs3 fc1 sc0 ls0 ws0">4.1<span class="ff2 sc1"> <span class="_"> </span>移动数据库的产生背景</span></div><div class="t m0 x9 h8 y1d ff3 fs3 fc1 sc0 ls0 ws0">1 <span class="_ _7"> </span><span class="ff2 sc1">移动计算环境和移动数据系统参考模型</span></div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6279d393517cd20ea4e2f137/bg4.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x8 h8 y1c ff3 fs3 fc1 sc0 ls0 ws0">1.2<span class="ff2 sc1"> <span class="_"> </span>移动计算环境的体系结构</span></div><div class="t m0 x9 h8 y1d ff1 fs3 fc1 sc0 ls0 ws0">1 <span class="_ _7"> </span><span class="ff2 sc1">移动计算环境和移动数据系统参考模型</span></div><div class="t m0 xa h9 y1e ff2 fs4 fc1 sc0 ls0 ws0">无线广播信元</div><div class="t m0 xb ha y1f ff2 fs5 fc1 sc0 ls0 ws0">固定主机</div><div class="t m0 x8 h7 y20 ff1 fs6 fc2 sc0 ls0 ws0"> <span class="_ _8"> </span><span class="ff2 fs1">移动平台的通用<span class="_ _2"></span>结构</span></div><div class="t m0 xc hb y21 ff2 fs6 fc3 sc0 ls0 ws0">高速广域网</div><div class="t m0 xd ha y22 ff2 fs5 fc1 sc0 ls0 ws0">固定主机</div><div class="t m0 xe ha y23 ff2 fs5 fc1 sc0 ls0 ws0">固定主机</div><div class="t m0 xf ha y24 ff2 fs5 fc1 sc0 ls0 ws0">固定主机</div><div class="t m0 x10 ha y25 ff2 fs5 fc1 sc0 ls0 ws0">固定主机</div><div class="t m0 x11 h8 y26 ff2 fs3 fc3 sc0 ls0 ws0">基站</div><div class="t m0 x12 h8 y27 ff2 fs3 fc3 sc0 ls0 ws0">基站</div><div class="t m0 x13 h8 y28 ff2 fs3 fc3 sc0 ls0 ws0">基站</div><div class="t m0 x14 h8 y29 ff2 fs3 fc3 sc0 ls0 ws0">基站</div><div class="t m0 x15 h9 y2a ff2 fs4 fc1 sc0 ls0 ws0">为移动单元</div><div class="t m0 x15 h9 y2b ff2 fs4 fc1 sc0 ls0 ws0">为无线连接</div><div class="t m0 x16 h9 y2c ff2 fs4 fc1 sc0 ls0 ws0">断开状态</div><div class="t m0 x17 h9 y2d ff2 fs4 fc1 sc0 ls0 ws0">无线广播信元</div><div class="t m0 x18 h9 y2e ff2 fs4 fc1 sc0 ls0 ws0">无线广播信元</div><div class="t m0 x19 h9 y2f ff2 fs4 fc3 sc0 ls0 ws0">穿越</div><div class="t m0 x1a h9 y30 ff2 fs4 fc1 sc0 ls0 ws0">无线<span class="_ _9"> </span><span class="ff4">LAN<span class="_"> </span></span>信元</div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf5" class="pf w0 h0" data-page-no="5"><div class="pc pc5 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6279d393517cd20ea4e2f137/bg5.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x16 h6 y31 ff4 fs1 fc1 sc0 ls0 ws0">•</div><div class="t m0 x1b h7 y32 ff2 fs1 fc1 sc0 ls0 ws0">移动单元</div><div class="t m0 x7 hc y33 ff4 fs3 fc1 sc0 ls0 ws0">–</div><div class="t m0 x1c hc y34 ff4 fs3 fc1 sc0 ls0 ws0">Mobile units, MU</div><div class="t m0 x7 hc y35 ff4 fs3 fc1 sc0 ls0 ws0">–</div><div class="t m0 x1c h8 y36 ff2 fs3 fc1 sc0 ls0 ws0">是使用电池供电的便携式计算机等移动设备</div><div class="t m0 x7 hc y37 ff4 fs3 fc1 sc0 ls0 ws0">–</div><div class="t m0 x1c h8 y38 ff2 fs3 fc1 sc0 ls0 ws0">可在地理位置移动性区域内自由移动</div><div class="t m0 x16 h6 y39 ff4 fs1 fc1 sc0 ls0 ws0">•</div><div class="t m0 x1b h7 y3a ff2 fs1 fc1 sc0 ls0 ws0">移动计算平台</div><div class="t m0 x7 hc y3b ff4 fs3 fc1 sc0 ls0 ws0">–</div><div class="t m0 x1c h8 y3c ff2 fs3 fc1 sc0 ls0 ws0">类似于客户机<span class="_ _7"> </span><span class="ff4">/<span class="_"> </span></span>服务器体系结构</div><div class="t m0 x7 hc y3d ff4 fs3 fc1 sc0 ls0 ws0">–</div><div class="t m0 x1c h8 y3e ff2 fs3 fc1 sc0 ls0 ws0">移动单元有时被看作客户机，基站作为服务器</div><div class="t m0 x7 hc y3f ff4 fs3 fc1 sc0 ls0 ws0">–</div><div class="t m0 x1c h8 y40 ff2 fs3 fc1 sc0 ls0 ws0">客户机和服务器通过无线信道进行通信</div><div class="t m0 x8 h8 y1c ff3 fs3 fc1 sc0 ls0 ws0">1.2<span class="ff2 sc1"> <span class="_"> </span>移动计算环境的体系结构</span></div><div class="t m0 x9 h8 y1d ff1 fs3 fc1 sc0 ls0 ws0">1 <span class="_ _7"> </span><span class="ff2 sc1">移动计算环境和移动数据系统参考模型</span></div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
