碳铬镍含量对高铬铸铁测温保护管性能的影响

通过高温氧化和高温磨损实验,研究了C、Cr、Ni 3个主要元素对高铬铸铁在高温条件下抗氧化和抗磨损性能的影响。结果表明:Cr含量越高,抗氧化性能和抗磨损性能越好;提高碳含量,明显提高高铬铸铁的高温抗磨性能;当w(Cr)=16％时,加入Ni能提高高铬铸铁的高温抗氧化性能;w(Cr)=30％时,Ni对高铬铸铁的抗氧化性能和抗磨损性能影响不明显.在1100℃以下,选用w(C)=2.8％,w(Cr)=30％、不加Ni的高铬铸铁铸造高温抗磨热电偶保护管,既有较好的使用寿命,又可降低成本.     

Effect of Negative Emotional Content on Working Memory and Long-Term Memory.

In long-term memory, negative information is better remembered than neutral information. Differences in processes important to working memory may contribute to this emotional memory enhancement. To examine the effect that the emotional content of stimuli has on working memory performance, the authors asked participants to perform working memory tasks with negative and neutral stimuli. Task accuracy was unaffected by the emotional content of the stimuli. Reaction times also did not differ for negative relative to neutral words, but on an n-back task using faces, participants were slower to respond to fearful faces than to neutral faces. These results suggest that although emotional content does not have a robust effect on working memory, in some instances emotional salience can impede working memory performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

多孔粒状铵油炸药在乌海矿业公司的应用

通过对多孔粒状铵油炸药质量影响因素的分析，结合乌海矿业公司爆破的特点，提出了保证炸药加工质量的合理参数。     

硫含量对钴钼型耐硫脱氧剂的脱氧活性影响

研究了工艺气中硫含量对钴钼型耐硫脱氧剂脱氧活性的影响。通过常压微反 -色谱装置测定脱氧剂的本征脱氧活性 ,加压原粒度反应器测定脱氧剂的表观脱氧活性 ,结合实际经验确定了耐硫脱氧剂所需的最低硫含量。还讨论了温度、压力、空速对耐硫脱氧剂脱氧活性的影响。结果表明 ,耐硫脱氧剂完全能满足耐硫变换工艺的要求 ,而且有耐硫变换的作用 ,并对耐硫变换催化剂起到保护作用     

整体毡纤维体积分数对CVD增密的影响

将3组不同纤维体积分数的整体毡采用等温CVD进行沉积热解炭增密,结合CVD沉积过程中整体毡内气体传质数学模型,研究了整体毡的纤维体积分数对CVD增密过程的影响,研究结果表明:纤维体积低的整体毡沉积时增重率高;纤维体积分数高的整体毡容易获得较高密度的C/C复合材料;纤维体积分数超过35％的整体毡经过300 h的化学气相沉积,坯体的体积密度能达到1.52 g/cm~3。     

长链烯烃-苯烷基化反应的分子筛催化剂再生性能的研究

通过热重分析和活性稳定性评定考察催化剂的再生性能。研究结果表明,进行氯气吹扫以及苯抽提后进行氮气吹扫两种预处理,导致失活催化剂的起燃点和烧焦反应活化能均有所提高,有利于控制烧焦反应速度。按苯抽提、氮气吹扫、烧焦的顺序,分三个阶段进行催化剂再生,再生催化剂的活性稳定性得到更充分的恢复。     

FAST MEASUREMENT OF ASH CONTENT IN COAL WASHING PLANT

The coal filter cake is a product of fine coal after floatation which has an ash content of 7-13%, water content of 30±2%, and a particle size of less than 1 mm. The ash content was measured by the intensity of the single backscattered gamma-ray, and its accuracy is mainly dependent on the energy of the gamma-ray. The 238Pu low energy photon source is selected in this work. The energy of its gamma-ray is 15 keV, which can result not only in the best sensitivity, but also in the lowest contribution to the environment radiation. The root mean square deviation of the ash measurement is±0.33% (±1σ).     

原子吸收分光光度法测定焦锑酸钾中锑含量

比较详细地研究用火焰原子吸收分光光度法测定焦锑酸钾中锑含量的技术条件和测定方法。     

超低硫燃料柴油的润滑性研究与性能研究

研究提出了超低硫燃料暂定战术技术指标，并规定了其润滑性要求。通过对基础油生产工艺研究、柴油润滑性添加剂研究及配方性能评定，成功研制了一种环保型超低硫燃料，满足外燃发动机（燃烧室高温高压）的使用要求。研制产品具有馏分窄、闪点高、氧化安定性好、低温性能优异、硫含量超低、润滑性能好等特点。燃料的低硫化是燃料发展的必然趋势。在我国开展低硫或超低硫环保型燃料研制，同时开展燃料润滑性添加剂的研制，具有重要意义。     

双噁唑啉化合物对PBT的增粘作用

以２．２＇－双（２－唑啉）和双（２－唑啉基）苯作扩链剂，用焙融挤出的方法，对聚对苯二甲酸丁二酯（ＰＢＴ）进行扩链，考察扩链剂的用量、反应时间和反应温度对ＰＢＴ的特性粘度及端羧基含量（ＣＶ）的影响。结果表明，当用２，２＇－双（２－唑啉）作扩链剂时，ＰＢＴ的特性粘度［η］从０．７９９提高到０．９２６ｄＬ／ｇ，ＣＶ降至５ｅｑ／１０￣６ｇ以下；当用双（２－　唑啉基）苯作扩链剂，［η］从０．７６３增至０．９２５ｄＬ／ｇ，ＣＶ降至１０ｅｑ／１０￣６ｇ以下，达到了较满意的扩链效果。