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onmouseover="this.title = $('recommendv_subtract').innerHTML + ' 人反对'"><i><img src="static/image/common/rec_subtract.gif" alt="反对" />反对<span id="recommendv_subtract">0</span></i></a> </div> </td> <td valign="top" class="album_side_r"> <div class="album_side"> <div class="hm mtn mbn"> <a href="http://club.oecr.com/space-uid-10207.html" target="_blank" class="xi2"><img src="http://www.oecr.com/uc_server/avatar.php?uid=10207&size=small" /></a> <span class="tit_author"> <a href="http://club.oecr.com/space-uid-10207.html">乏味</a> </span> </div> <div class="date"><span>发布时间:</span> 2010-7-6 10:45</div> <div class="album_info"> <h3>正文摘要: </h3> <p> a, Experimental set-up (schematic). b, Measured vertical temperature (blue, right scale) and derived supersaturation profile (red, left scale) in the chamber. Image credit: Nature Photonics, doi ...</p> </div> </div> </td> </tr> </table> </div> </div> <div class="bm vw pl" id="comment"> <div class="bm_h cl"> <h2>回复</h2> </div> <div class="bm_c"> <div id="postlistreply" class="xld xlda mbm"><div id="post_new" class="viewthread_table" style="display: none"></div></div><div id="post_655857" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-77717.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=77717&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-77717.html" target="_blank" class="xi2">rosemaryboy</a><em id="author_655857"> 发表于</em> <span class="xg1 xw0">2010-7-11 13:07:54</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_655857"> 非常好的研究啊，为激光应用开辟了新方向。</td></tr></table> </div> <div id="comment_655857" class="cm"> </div> <div id="post_rate_div_655857"></div> </div> </dd> </dl> </div> <div id="post_654932" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-10207.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=10207&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-10207.html" target="_blank" class="xi2">乏味</a><em id="author_654932"> 发表于</em> <span class="xg1 xw0">2010-7-6 10:51:44</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_654932"> <span id="swf_EBZ"></span><script type="text/javascript" reload="1">$('swf_EBZ').innerHTML=AC_FL_RunContent('width', '550', 'height', '400', 'allowNetworking', 'internal', 'allowScriptAccess', 'never', 'src', 'static/image/common/flvplayer.swf', 'flashvars', 'file=http%3A%2F%2Fcdn.physorg.com%2Fnewman%2Fgfx%2Fvideo%2Flaserscouldb.flv', 'quality', 'high', 'wmode', 'transparent', 'allowfullscreen', 'true');</script><br /> <br /> Firing a high-powered laser through an atmospheric cloud chamber containing saturated air.</td></tr></table> </div> <div id="comment_654932" class="cm"> </div> <div id="post_rate_div_654932"></div> </div> </dd> </dl> </div> <div id="post_654931" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-10207.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=10207&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-10207.html" target="_blank" class="xi2">乏味</a><em id="author_654931"> 发表于</em> <span class="xg1 xw0">2010-7-6 10:49:12</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_654931"> 目前的人工降雨技术一般是在空中播撒碘化银颗粒作为凝结核，促使水蒸气凝结，而一项最新研究显示，可以使用激光将空气分子离子化，使之成为天然的凝结核，从而达到人工降雨的目的。<br /> <br /> 新一期英国《自然·光子学》杂志刊登报告说，瑞士等国研究人员发明了这种新技术。其原理是向空气中发射一种高能量短脉冲激光，它会使照射路径上的氮气分子和氧气分子离子化。这些离子化的空气分子就成为天然的凝结核，促使水蒸气凝结为水滴。<br /> <br /> 研究人员向含有水蒸气的实验装置中发射这种激光，可以马上观察到直径约５０微米的水滴形成，这些小水滴还会进一步合并为直径约８０微米的大水滴。户外实验也显示，在空气湿度较高的情况下，发射这种激光可以促使空气中水滴的形成。<br /> <br /> 瑞士日内瓦大学研究人员热罗姆·卡斯帕里安介绍说，这一技术目前还处于初级阶段，不能马上用于人工降雨，因为一束激光只能促使其所照射的路径上形成水滴。下一步研究将探索是否能通过用激光扫过天空的方式，促使水滴在更大面积的空气中形成。<br /> <br /> 还有观点认为，虽然一束激光不能直接用于人工降雨，但可以通过测量它所促使形成的水滴规模来判断空气湿度，从而帮助降雨预测。 <br /> </td></tr></table> </div> <div id="comment_654931" class="cm"> </div> <div id="post_rate_div_654931"></div> </div> </dd> </dl> </div> </div> </div> </div> <script type="text/javascript"> new lazyload(); 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