{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"采用超声无损评价技术即NDE技术,对不同的粉末实验件进行了超声检测研究.结果表明,粉末材料中的<span style=\"color:red\">声速</span><span style=\"color:red\">和声</span><span style=\"color:red\">衰减</span>是表征材料显微组织的两个重要超声波参量,其中<span style=\"color:red\">声速</span>与材料的致密性有关,声<span style=\"color:red\">衰减</span>与材料的晶粒度有关.","authors":[{"authorName":"张凤戈","id":"b74721b3-a7d7-4491-b77a-9704a04b28b3","originalAuthorName":"张凤戈"}],"doi":"10.3969/j.issn.1001-0777.2000.01.006","fpage":"23","id":"47b1fe2d-3fb7-4477-baea-1f8c932305b9","issue":"1","journal":{"abbrevTitle":"WLCS","coverImgSrc":"journal/img/cover/WLCS.jpg","id":"64","issnPpub":"1001-0777","publisherId":"WLCS","title":"物理测试"},"keywords":[{"id":"798658fe-8f62-44a8-8381-6f19ce8feb66","keyword":"NDE技术","originalKeyword":"NDE技术"},{"id":"f0a99e21-bf1f-4c53-9a3d-cca96229a0b6","keyword":"FGH95粉末材料","originalKeyword":"FGH95粉末材料"},{"id":"50ea3023-4e06-4db7-926e-c8a9806c2617","keyword":"<span style=\"color:red\">声速</span><span style=\"color:red\">和声</span><span style=\"color:red\">衰减</span>","originalKeyword":"声速和声衰减"}],"language":"zh","publisherId":"wlcs200001006","title":"NDE技术在FGH95粉末材料中的应用","volume":"","year":"2000"},{"abstractinfo":"文章根据<span style=\"color:red\">声速</span>的测量实验中示波器信号随着接收换能器的移动而变化这一现象,拓展声波<span style=\"color:red\">衰减</span>的研究及声强<span style=\"color:red\">衰减</span>系数的测量实验.","authors":[{"authorName":"贺梅英","id":"1e06c884-d99c-4048-a1df-661e23ce1c1c","originalAuthorName":"贺梅英"},{"authorName":"黄沛天","id":"6047a84e-6cf8-43c2-91b6-e9321630cf85","originalAuthorName":"黄沛天"}],"doi":"10.3969/j.issn.1001-0777.2007.01.008","fpage":"27","id":"3bd625ca-2248-4867-97cb-b3fba646e46c","issue":"1","journal":{"abbrevTitle":"WLCS","coverImgSrc":"journal/img/cover/WLCS.jpg","id":"64","issnPpub":"1001-0777","publisherId":"WLCS","title":"物理测试"},"keywords":[{"id":"f8dbda1b-d721-4b66-aa85-ba2d4f70dd69","keyword":"换能器","originalKeyword":"换能器"},{"id":"60672f39-17f9-48ea-9ed1-82fe3475d61b","keyword":"声波<span style=\"color:red\">衰减</span>","originalKeyword":"声波衰减"},{"id":"cbae0850-cdba-4d2f-9ce4-263c941356b1","keyword":"声强<span style=\"color:red\">衰减</span>系数","originalKeyword":"声强衰减系数"}],"language":"zh","publisherId":"wlcs200701008","title":"<span style=\"color:red\">声速</span>测量实验中声波<span style=\"color:red\">衰减</span>现象的研究","volume":"25","year":"2007"},{"abstractinfo":"文章根据<span style=\"color:red\">声速</span>的测量实验中示波器信号随着接收换能器的移动而变化这一现象，拓展声波<span style=\"color:red\">衰减</span>的研究及声强<span style=\"color:red\">衰减</span>系数的测量实验。","authors":[{"authorName":"贺梅英","id":"80eb5bdf-f4f8-4a3a-9bb2-0fbca5f25c0f","originalAuthorName":"贺梅英"},{"authorName":"黄沛天","id":"88de91c9-b401-4d98-8fc5-52bbfd820f9e","originalAuthorName":"黄沛天"}],"categoryName":"|","doi":"","fpage":"27","id":"789dca1d-4f57-4fc4-9562-b97c14931c24","issue":"1","journal":{"abbrevTitle":"WLCS","coverImgSrc":"journal/img/cover/WLCS.jpg","id":"64","issnPpub":"1001-0777","publisherId":"WLCS","title":"物理测试"},"keywords":[{"id":"5233c402-a084-428a-af4a-586b3a131ddb","keyword":"换能器","originalKeyword":"换能器"},{"id":"5e368638-ec0b-4316-af3e-9356342b63ce","keyword":"attenuation of sound wave","originalKeyword":"attenuation of sound wave"},{"id":"ec3e7938-77ef-45a2-99e5-de730d78bcd8","keyword":"attenuation coefficient of sound intensity","originalKeyword":"attenuation coefficient of sound intensity"}],"language":"zh","publisherId":"1001-0777_2007_1_13","title":"<span style=\"color:red\">声速</span>测量实验中声波<span style=\"color:red\">衰减</span>现象的研究","volume":"25","year":"2007"},{"abstractinfo":"用脉冲回波法测定了甲基丙烯酸酯类共聚物的超声<span style=\"color:red\">衰减</span>与<span style=\"color:red\">声速</span>。在2.5和5MHz 两种频率下,考察了共聚物超声<span style=\"color:red\">衰减</span>的温度关系。所得结果与DSC 法作了比较,共聚物的玻璃化转变温度T_g 相近。","authors":[{"authorName":"徐文英","id":"f07927d6-d046-4d63-ad70-3d203d2673de","originalAuthorName":"徐文英"},{"authorName":"周静","id":"0fef456e-d119-4f2a-aaf5-0a0dcacc5dd8","originalAuthorName":"周静"},{"authorName":"胡建恺","id":"690fd8ea-d8e4-4b1f-b14b-a96df21ad043","originalAuthorName":"胡建恺"}],"categoryName":"|","doi":"","fpage":"280","id":"ff4a42c6-cac5-45bc-904a-7ed36c661137","issue":"3","journal":{"abbrevTitle":"CLYJXB","coverImgSrc":"journal/img/cover/CLYJXB.jpg","id":"16","issnPpub":"1005-3093","publisherId":"CLYJXB","title":"材料研究学报"},"keywords":[{"id":"6ec40220-dfc7-409b-9993-bf77c3e3aa26","keyword":"超声<span style=\"color:red\">衰减</span>","originalKeyword":"超声衰减"},{"id":"5b4e055b-9fd6-4bed-871d-798b09830575","keyword":"velocity","originalKeyword":"velocity"},{"id":"1b2f0b43-3178-40fb-8d5e-5dd3ac004fd1","keyword":"polymeric ultrasonics","originalKeyword":"polymeric ultrasonics"}],"language":"zh","publisherId":"1005-3093_1989_3_10","title":"甲基丙烯酸酯类共聚物的超声<span style=\"color:red\">衰减</span>与<span style=\"color:red\">声速</span>","volume":"3","year":"1989"},{"abstractinfo":"析了气相<span style=\"color:red\">声速</span>与理想气体比定压热容的热力学关系，用超声变程干涉仪测定了1,1,1,2,3,3,3-七氟丙烷(HFC-227ea)的72组气相<span style=\"color:red\">声速</span>值，温度范围273-333 K，压力范围26-315 kPa，测量不确定度小于0.05%。根据这些实验数据，确定了HFC-227ea的理想气体比定压热容<span style=\"color:red\">和声速</span>第二维里系数，并分别拟合得到了与温度的函数，理想气体比定压热容的不确定度小于0.5%。使用方阱势能模型导出了HFC-227ea的第二维里系数，并与文献值进行了比较。","authors":[{"authorName":"张昌","id":"7c7ebc7f-1f5c-4d5e-b0eb-889947c40f93","originalAuthorName":"张昌"},{"authorName":"段远源","id":"8ad8dba5-64a4-4d99-8d99-7c4a230bd655","originalAuthorName":"段远源"},{"authorName":"史琳","id":"293ea411-e7bf-4e19-887a-c5b3de531a0c","originalAuthorName":"史琳"},{"authorName":"朱明善","id":"098944d4-1305-4fe7-a132-242e92c391c1","originalAuthorName":"朱明善"},{"authorName":"韩礼钟","id":"77d30dab-941e-4e43-8529-bc5ceb2c201c","originalAuthorName":"韩礼钟"}],"doi":"","fpage":"154","id":"57b0ca0b-df5f-4be7-b1d1-243d03cfaf07","issue":"2","journal":{"abbrevTitle":"GCRWLXB","coverImgSrc":"journal/img/cover/GCRWLXB.jpg","id":"32","issnPpub":"0253-231X","publisherId":"GCRWLXB","title":"工程热物理学报   "},"keywords":[{"id":"04a93c29-f628-4f00-9b36-b2054c778b54","keyword":"HFC-227ea","originalKeyword":"HFC-227ea"},{"id":"4fa38cd2-f2a4-4819-885d-79f72e3b92df","keyword":"<span style=\"color:red\">声速</span>","originalKeyword":"声速"},{"id":"0076d6fe-7421-47c0-9c76-de1b4a7ab3ec","keyword":"理想气体比定压热容","originalKeyword":"理想气体比定压热容"},{"id":"4bc09da4-e510-4b34-8be3-693dca481615","keyword":"第二维里系数","originalKeyword":"第二维里系数"}],"language":"zh","publisherId":"gcrwlxb200102007","title":"1,1,1,2,3,3,3- 七氟丙烷的气相<span style=\"color:red\">声速</span>","volume":"22","year":"2001"},{"abstractinfo":"应用全势线性响应线性糕模轨道方法,对MgCNi3镁位进行钠掺杂的虚原子近似,计算Mg1-x2NaxCNi3(x=0.0,0.06,0.11,0.115,0.12)的电子态密度和晶格振动(x=0.0,0.06),并讨论磁性<span style=\"color:red\">和声</span>子谱.计算结果表明,随着掺杂量x的增加,原胞磁矩迅速增加,在x=0.115时,费米能级处总态密度几乎落在范霍夫奇异峰峰顶上且有较大的自旋涨落,预示MgCNi3处在铁磁不稳定的边缘.x=0.12的费米面处总态密度与x=0.115相比有较大的下降,使得超导库珀对配对数减少,会带来超导电性的降低.x为0.06的钠掺杂,使得布里渊区沿三个主要高对称性方向(Γ-X、Γ-M、Γ-R)虚频范围扩大,容易使MgCNi3结构不稳定而产生结构相变.","authors":[{"authorName":"舒华兵","id":"0e6d35a1-0dae-44af-ae05-a030ebb3940f","originalAuthorName":"舒华兵"},{"authorName":"王玮","id":"86463366-2d03-4286-8ddb-bd02edabe00f","originalAuthorName":"王玮"},{"authorName":"刘楣","id":"dfb44da2-369b-4226-b1d4-3343e5269b8f","originalAuthorName":"刘楣"}],"doi":"","fpage":"262","id":"290d66fc-50b6-47cd-b19c-675d61a61b15","issue":"4","journal":{"abbrevTitle":"DWWLXB","coverImgSrc":"journal/img/cover/DWWLXB.jpg","id":"19","issnPpub":"1000-3258","publisherId":"DWWLXB","title":"低温物理学报   "},"keywords":[{"id":"c5ebc7a8-b83b-4fc2-a469-5427bbc1569f","keyword":"态密度","originalKeyword":"态密度"},{"id":"56bd4e2e-1541-439f-928e-dbd3eed8ca43","keyword":"晶格振动","originalKeyword":"晶格振动"},{"id":"99b5ee6e-0b53-4640-bf12-915a07780298","keyword":"磁性","originalKeyword":"磁性"}],"language":"zh","publisherId":"dwwlxb201004005","title":"MgCNi3空穴(Na)掺杂的磁性<span style=\"color:red\">和声</span>子谱研究","volume":"32","year":"2010"},{"abstractinfo":"用小波变换获取超声波能量的时间-尺度分布,研究<span style=\"color:red\">衰减</span>系数随尺度的分布规律,定义加权的超声多尺度<span style=\"color:red\">衰减</span>系数,结合粒子群算法设计的最优尺度组合及其归一化权重分配策略,建立晶粒尺寸的超声多尺度<span style=\"color:red\">衰减</span>评价模型.选用304不锈钢进行实验,其<span style=\"color:red\">衰减</span>系数-尺度分布图表明超声波在小尺度下<span style=\"color:red\">衰减</span>迅速,体现了高散射材料中<span style=\"color:red\">衰减</span>的频率特征;而随着试样晶粒尺寸增大,整个尺度范围内的<span style=\"color:red\">衰减</span>都明显加剧.实验结果显示,<span style=\"color:red\">声速</span>法、传统<span style=\"color:red\">衰减</span>法与本方法的最大系统误差分别是+12.57％,+5.85％和-1.33％.对金相法测得平均晶粒尺寸为103.5 μm的验证试样用3种方法进行评价,结果分别为(110.4±7.8),(98.2±6.6)和(101.7士3.9) μm.本方法不仅可降低系统误差,且随机误差也被小波变换的恒Q滤波特性有效抑制.","authors":[{"authorName":"李雄兵","id":"7d69e157-37a9-4c8a-ae60-f0712a7d49b4","originalAuthorName":"李雄兵"},{"authorName":"宋永锋","id":"de49b1d7-f736-4c6d-a0e4-48bb3ae72101","originalAuthorName":"宋永锋"},{"authorName":"倪培君","id":"f11d2be3-f659-4959-b0d8-8469c22ea7ec","originalAuthorName":"倪培君"},{"authorName":"刘锋","id":"5729bf89-f75c-471c-bbe3-0e24d113c005","originalAuthorName":"刘锋"}],"doi":"10.11900/0412.1961.2014.00369","fpage":"121","id":"c3b3d2c2-d197-43be-a34d-d593c2e27021","issue":"1","journal":{"abbrevTitle":"JSXB","coverImgSrc":"journal/img/cover/JSXB.jpg","id":"48","issnPpub":"0412-1961","publisherId":"JSXB","title":"金属学报"},"keywords":[{"id":"81ce35ef-01ff-4cfc-9094-98accf3f8f7e","keyword":"晶粒尺寸","originalKeyword":"晶粒尺寸"},{"id":"cf18c305-c59b-46e8-9b3e-9a62ff67e216","keyword":"超声无损评价","originalKeyword":"超声无损评价"},{"id":"12b4fb8e-8d87-43ec-b959-c7ad16a7d888","keyword":"多尺度分析","originalKeyword":"多尺度分析"},{"id":"813f637e-f7c6-43c2-b013-b2faa2d26a23","keyword":"<span style=\"color:red\">衰减</span>系数","originalKeyword":"衰减系数"}],"language":"zh","publisherId":"jsxb201501015","title":"面向晶粒尺寸的超声多尺度<span style=\"color:red\">衰减</span>评价方法","volume":"51","year":"2015"},{"abstractinfo":"为了采用计算流体力学方法对热声制冷机进行数值模拟,以突破热声热机现有计算方法的限制,基于压力修正算法的基本思想开发了用于模拟非稳态小马赫数可压缩流动的数值程序,并将其应用于声波<span style=\"color:red\">衰减</span>的数值模拟.对一维及二维声波<span style=\"color:red\">衰减</span>过程的模拟显示,数值计算的结果与声学理论的预测符合良好,说明了方法的正确性.","authors":[{"authorName":"黄竞","id":"2ebe89c8-997a-477a-80d6-1c4b4be057e6","originalAuthorName":"黄竞"},{"authorName":"何雅玲","id":"3332b53f-52a5-4f45-a48f-2d07b6b5efc9","originalAuthorName":"何雅玲"},{"authorName":"李茹","id":"5f60a01f-598c-45ee-b703-ef3e38ea0ceb","originalAuthorName":"李茹"}],"doi":"","fpage":"202","id":"6bec8238-c116-4db7-b27a-c49b18494e81","issue":"2","journal":{"abbrevTitle":"GCRWLXB","coverImgSrc":"journal/img/cover/GCRWLXB.jpg","id":"32","issnPpub":"0253-231X","publisherId":"GCRWLXB","title":"工程热物理学报   "},"keywords":[{"id":"eb5c39ef-349d-4fd6-a333-67e4d03b637b","keyword":"声波<span style=\"color:red\">衰减</span>","originalKeyword":"声波衰减"},{"id":"2ecf6418-2d03-4955-9b38-401a44930b95","keyword":"低马赫数可压缩流动","originalKeyword":"低马赫数可压缩流动"},{"id":"66c8a92c-5c02-4a2f-9b2b-3d40ee88d83e","keyword":"SIMPLE算法","originalKeyword":"SIMPLE算法"}],"language":"zh","publisherId":"gcrwlxb200802006","title":"声波<span style=\"color:red\">衰减</span>的数值模拟","volume":"29","year":"2008"},{"abstractinfo":"以描述高分子材料粘弹行为的三元模型为出发点,以声波在高分子介质中的传播理论为依据,推导出了材料的水声声<span style=\"color:red\">衰减</span>能力与材料的动态力学性能参数包括损耗因子、松弛前的剪切模量、松弛后的剪切模量以及材料的密度和厚度之间的关系式.为实验验证所推导的关系式,设计合成了一系列阻尼性能不同的聚合物,分别测试了它们的动态力学性能<span style=\"color:red\">和声</span><span style=\"color:red\">衰减</span>能力.用材料的动态力学性能参数计算得到的水声声<span style=\"color:red\">衰减</span>系数与实验测得的声<span style=\"color:red\">衰减</span>能力相符合.该数学模型为找出吸声系数与材料的动态力学性能之间的关系、指导水声材料设计奠定了基础.","authors":[{"authorName":"文庆珍","id":"0df7920c-9149-44d1-99e7-adaeb15aecd6","originalAuthorName":"文庆珍"},{"authorName":"朱金华","id":"cc061af3-2ddc-49d7-a9d1-299d77ce0fb5","originalAuthorName":"朱金华"},{"authorName":"姚树人","id":"1d25fcb5-cc91-4f61-badb-d9b02db661a1","originalAuthorName":"姚树人"}],"doi":"","fpage":"121","id":"aef23dbc-441d-4e1c-afac-5df8f2e80540","issue":"5","journal":{"abbrevTitle":"GFZCLKXYGC","coverImgSrc":"journal/img/cover/GFZCLKXYGC.jpg","id":"31","issnPpub":"1000-7555","publisherId":"GFZCLKXYGC","title":"高分子材料科学与工程"},"keywords":[{"id":"0b3d0a8b-284f-4d42-ae7c-3fee8649ad4e","keyword":"声<span style=\"color:red\">衰减</span>能力","originalKeyword":"声衰减能力"},{"id":"ab6a61fd-f20c-4a51-81f3-6f2a5fe9d606","keyword":"阻尼性能","originalKeyword":"阻尼性能"},{"id":"0984c024-532c-49c3-8110-42e279bd3c16","keyword":"水声吸声材料","originalKeyword":"水声吸声材料"},{"id":"98bc5162-afd2-4802-a460-c1d264719385","keyword":"数学模型","originalKeyword":"数学模型"}],"language":"zh","publisherId":"gfzclkxygc200605030","title":"聚合物的水声声<span style=\"color:red\">衰减</span>能力与动态力学性能的关系","volume":"22","year":"2006"},{"abstractinfo":"在轻气炮试验装置上对开孔泡沫铝的冲击<span style=\"color:red\">衰减</span>特性进行了试验研究,得出了在冲击波加载条件下开孔泡沫铝中的冲击波压力及波速随距离的变化关系曲线.结果表明:开孔泡沫铝具有良好的冲击<span style=\"color:red\">衰减</span>性能,使冲击波压力在其中呈指数关系<span style=\"color:red\">衰减</span>,而波速则随距离呈线性关系<span style=\"color:red\">衰减</span>.","authors":[{"authorName":"程和法","id":"26f86956-2004-44ea-bd37-3063abbb8629","originalAuthorName":"程和法"},{"authorName":"黄笑梅","id":"a1bc6ef7-ceaf-41f4-a9b0-3025cff52d92","originalAuthorName":"黄笑梅"},{"authorName":"唐玉志","id":"0c539f6c-8033-412b-8738-f5506e4f4a49","originalAuthorName":"唐玉志"},{"authorName":"韩福生","id":"ae21dfba-cb96-48ff-b65b-ed6c6ff2d3a7","originalAuthorName":"韩福生"}],"doi":"10.3969/j.issn.1004-244X.2002.03.002","fpage":"5","id":"7b6f14e7-8b7a-4781-a7a0-cb7558967793","issue":"3","journal":{"abbrevTitle":"BQCLKXYGC","coverImgSrc":"journal/img/cover/BQCLKXYGC.jpg","id":"4","issnPpub":"1004-244X","publisherId":"BQCLKXYGC","title":"兵器材料科学与工程   "},"keywords":[{"id":"29f779c3-23b1-45e1-abc6-ae1b543a7a96","keyword":"开孔泡沫铝","originalKeyword":"开孔泡沫铝"},{"id":"db95cee0-7afe-4b1c-bd52-58e9147a8e2a","keyword":"冲击<span style=\"color:red\">衰减</span>","originalKeyword":"冲击衰减"},{"id":"6d1959e6-59ca-40d5-a4ee-8ed6fca9e8d3","keyword":"压力","originalKeyword":"压力"},{"id":"c7213f07-ce70-4383-a832-1f310346603c","keyword":"波速","originalKeyword":"波速"}],"language":"zh","publisherId":"bqclkxygc200203002","title":"泡沫铝冲击<span style=\"color:red\">衰减</span>特性的研究","volume":"25","year":"2002"}],"totalpage":180,"totalrecord":1799}