乳腺浸润性导管癌p53表达与腋窝淋巴结转移的相关性分析

为研究乳腺浸润性导管癌组织p53表达及腋窝淋巴结转移的相关性,作者利用免疫组化染色检测72例浸润性导管癌标本中p53的表达水平,分析p53表达及腋窝淋巴结转移的关系。得出结果:腋淋巴结转移组共37例(52%),p53阳性表达21例(57%);未转移组共35例(48%),p53阳性表达11例(31%),转移组p53阳性表达较未转移组明显增高(P0.05);淋巴结转移数1~3个25例(68%)、≥4个12例(32%),p53表达阳性分别是12例(48%)和8例(67%),p53表达阳性率与淋巴结转移数呈正相关(P0.05)。结果表明,通过检测乳腺浸润性导管癌组织中p53蛋白的表达水平可以判断腋窝淋巴结转移状况和愈后。     

LTE上行接收分集中一种新的判决反馈检测算法

针对快速时变信道,提出了一种新的联合信道估计和符号判决反馈检测算法应用于LTE上行接收分集.新算法对OFDM数据符号进行硬判决,并利用硬判决结果对该符号上的信道进行估计,估计结果用于相邻数据符号的均衡和解调.分析和仿真结果表明：在高信噪比、快速移动环境下,新算法相对线性插值算法具有较好的性能,而且具有较高的实用性.     

基于高频臭氧发生器介质阻挡放电特性研究

为了实现高频臭氧电源与臭氧发生器阻抗匹配问题,采用Q-V Lissajous图形法研究了电源电压幅值和频率对介质阻挡放电(DBD)的放电功率、等效电容等放电参量的影响.试验结果表明,增大外加电源电压幅值和激励频率,放电强度增强,放电功率增大;随着电源电压和频率增大,放电管总等效电容C在1.350～1.356 nF内变化,电介质等效电容Cd增大,放电间隙等效电容Cg减小.     

基于语义向量模型的Web服务匹配方法*

针对当前Web服务匹配方法中存在的缺陷,将语义Web服务匹配方法与信息检索技术相结合,提出一种利用语义相似度扩展向量模型的Web服务匹配方法,并通过实验对匹配效果进行了检验与分析。实验结果证明,与基于经典向量模型的匹配方法和相关语义匹配方法相比,该匹配方法具有更高的准确率。     

邻溴苯酚在高温碱水中的脱溴和降解动力学研究

利用间歇反应器研究了邻溴苯酚在250℃～350℃高温液态水中的降解行为,探讨了脱溴效率的影响因素和降解反应动力学。结果表明：升高温度和添加碱性物质能显著提高脱溴率;邻溴苯酚在0.1mol/L碳酸钠溶液中的降解符合表观一级反应动力学规律。GC-MS分析结果表明邻溴苯酚在高温碱水中降解的主要产物为苯酚和邻苯二酚,并由此推测出降解途径。     

基于Blowfish和MD5的混合加密方案*

针对Blowfish算法在实际应用中存在的等价密钥、重复初始化等问题,提出Blowfish与MD5算法相结合,将MD5算法的生成值作为密钥的一部分对Blowfish算法进行初始化,使用概率统计方法证明该方案弥补了Blowfish算法的实际应用缺陷。计算结果表明,混合加密方案具有更高的安全性、更快的速度。     

2-巯基-5-甲氧基咪唑并[4,5-b]吡啶的合成

以2,6-二氯吡啶为原料,经过硝化、氨解、甲氧基取代、还原和环化5步反应制得泰妥拉唑重要中间体2-巯基-5-甲氧基咪唑并[4,5-b]吡啶,总收率达40.2%.通过红外光谱、核磁共振氢谱对部分中间体及最终产品的结构进行表征,证明结果正确.     

A new process of extracting vanadium from stone coal

A new process of extracting vanadium from the stone coal vanadium ore in Fangshankou, Dtmhuang area of Gansu Province, China was introduced. Various leaching experiments were carried out, and the results show that the vanadium ore in Fangshankou is difficult to process due to its high consumption of acid and the high leaching rate of impurities. However, the leaching rate can be up to 80% and the content of V2O5 in the residue can be between 0.22%-0.25% in the process of ore fine grinding→oxidation roasting→mixing and ripen-ing→aqueous leaching→P2O4 solvent extraction→sulfiuie acid stripping→oxidation and precipitation→decomposition by heat. Also, the quality of flaky V2O5 produced by this process can meet the requirements of GB3283-87. The total leaching rate of vanadium is 70%. Also, three types of wastes are easy to treat. The vanadium extraction process is better in relation to the aspect of environmental protection than the sodium method.     

Crack elongation and its width of large depth reinforced concrete beams

In order to meet the requirement of structural inspection,the crack spacing and crack width at various heights in the tensile zone of six large depth reinforced concrete beams were measured under several loading levels of serviceability state.The effects of the depth of normal section beams on the crack spacing and crack width were analyzed,and the modified model is proposed for calculating the average crack spacing by thinking about the depth of normal section,the reinforcement arrangement and the effective reinforcement ratio.The relationships of crack widths at any position in the tensile zone and at the reinforcement level on the side surface of beam were studied.By theoretical and statistical analysis,a method is proposed to calculate the ratios of crack widths between any position and the reinforcement level on the side surface of large depth reinforced concrete beams.     

生物地耕法降解含油污泥的研究

对含油质量分数为9.0%和10.2%的油泥进行生物地耕法的研究。结果表明,生物降解120d后,油泥残油质量分数分别由9.0%和10.2%降至3.1%和4.0%,石油降解率分别为65.6%和60.8%;同时利用气相色谱-质谱分析生物降解前后含油污泥中饱和烃的组分和质量分数变化,含油质量分数为9.0%和10.2%油泥中的长链烷烃分别减少39.8%和42.2%。