掺加降粘剂Sasobit对沥青指标影响的研究

近年来改性沥青在道路工程的大量使用,满足了工作性要求,却在施工过程中产生了大量烟尘等废弃物。而降低拌和温度是较好的办法,于是出现了温拌技术。该文以新疆克拉玛依90#A级沥青为研究对象结合温拌技术,研究掺加不同剂量的Sasobit对沥青的四种组分的影响及由此引起的变化,以确定Sasobit的合理掺量。     

交错群A_p的数量刻画(英文)

证明了若p≥ 5且p与p - 2 均为素数 ,则交错群Ap 可用元的阶刻画     

Effective Factors on Forming Precision in Patternless Casting Manufacturing Technique

The patternless casting manufacturing (PCM) technique, which adopts a new concept of double scanning method, combines the principle of discreteness and deposition with resin-bonded sand technique. This paper is to evaluate the dimensional accuracy of sand mould on PCM. The two important factors-the liquid penetration rule in the space of particles and the shape and dimension of the agglomeration unit body, which influence the process parameters such as scanning speed, layer thickness, liquid flux on dimension accuracy, and surface qualities, were investigated systematically, thus the theoretical basis for these parameters was provided. Experiments on rapid manufacturing of sand mould were carried out, and the results of the free penetration and the constraint penetration well verified the relationship of the two factors and the process parameters.     

如何学好アクセント——介绍几种掌握日语アクセント的规律

长春长春白　晶长春如何学好アクセント——介绍几种掌握日语アクセント的规律@白晶$长春大学外国语学院!长春130022     

Effects of Electrochemical Treatment on the Superficial Properties of Rayon-based Carbon Fibers

The development of surface acidity on rayon-based carbon fibers during mild electrochemical treatment was investigated. Conductimetric titration was the primary method used to investigate the functionalities on the carbon fiber surface. The acidity on the surface of the untreated carbon fiber was very low, while for the treated fibers, the acidity increased significantly. Moreover, with the treatment extent proceeded, the acidity on the fiber surface also increased. SEM analysis shows electrochemical treatment under intense treatment degree caused considerable etch on the fiber surface. Cavities and grooves can be observed on the surface via the SEM microphotograph. While in a more mild treatment, electrochemical treatment didn't cause great etch on the surface of the fiber.     

预则型动态交通网络配流模型

提出卫种预测型动态交通网络配流模型，利用最优控制理论和最优化原理推出了模型最优解存在的条件，并给出最优解的经济解释，体现模型体现了道路使用者对路树的预测依赖于先进的交通信息系统和决策者的理发预测的特点，它与实际情况更为接近。     

Studies on the developmental biology of sweet potato seed

ｐｏｍｏｅａｂａｔａｔａｓＬａｍ．ｂｅｌｏｎｇｅｓｔｏｔｈｅｇｅｎｕｓＩｐｏｍｏｅａｏｆＣｏｎｖｏｌｖｕｌａｃｅａｅ．Ｉｔｓｆｌｏｗｅｒａｐｐａｒａｔｕｓｉｓｍｏｎｏｅｃｉｓｍ．Ｔｈｅｏｖａｒｙｃｏｎｓｉｓｔｅｓｏｆｔｗｏｌｏｃｕｌｅｓａｎｄｆｏｕｒｏｖｕｌｅｓ．Ｅａｃｈｃａｐｓｕｌｅｃｏｎｔａｉｎｓ１ｔｏ４ｓｅｅｄｓ．Ｉｔｗａｓｒｅｐｏｒｔｅｄｔｈａｔｔｈｅｏｖａｒｙｉｎｓｏｍｅｃｒｏｓｓｉｎｇｃｏｍｂｉｎａｔｉｏｎｓｈａｄ３ｌｏｃｕｌｅｓａｎｄ６ｏｖｕｌｅｓ．Ｅａｃｈｃａｐｓｕｌｅｃｏｎｔ…     

The Relationship between the Mechanical Properties of Pure Silk Fabrics and Dress Performance

In this paper, the relationship between mechanical properties of 30 pieces of pure silk fabrics and the dress performance has been analyzed. With the methods of multifactor linear step regression and discrimination analysis, the judgment and prediction model of the performance have been established.     

中高碳钢堆焊技术的应用及研究进展

介绍了近年来堆焊技术在中高碳钢的应用和堆焊焊条的研制进展情况。