YU Gang~ , LIU Yun-e~ , HU Bo-nan~ , LIU Zheng~ , YE Li-yuan~
Abstract:镁合金上电镀耐蚀金属一般要经过电镀铜的过渡层以提高后镀金属的均镀性能和结合力.焦磷酸盐电镀铜是一种环保型电镀工艺,通过电镀锌后再电镀铜能获得结合力和致密性较高的镀层.镀锌液以硫酸锌为主盐,焦磷酸钾为配合剂,柠檬酸铵作辅助配合剂兼导电盐,电流密度2~3A.dm-2,温度在40℃时得到的锌镀层耐蚀性能较好,镀铜电流密度在0.5~2A.dm-2之间得出的镀层耐蚀性能较好.用研究的焦磷酸盐镀铜工艺代替氰化镀铜工艺作为过渡铜镀层的无氰镀工艺.
Xiao HanNing;Shi HaiXia;Chen GangJun
Abstract:以铬渣为主要原料采用熔融法制备了性能良好的微晶玻璃.运用XRD研究了材料的晶相组成,采用二苯碳酰二胼分光光度法测定了样品中残留Cr^6+的含量.结果表明,当铬渣质量分数为40%和45%时,微晶玻璃中主晶相为镁铬尖晶石(MgCr2O4)、透辉石(CaMg(SiO3)2)和普通辉石(Ca(Mg,Fe)Si2O6);当铬渣质量分数增加到50%时,主晶相为黄长石类晶体;铬渣质量分数不超过50%时,微晶玻璃中残留Cr^6+ 含量为0~0.4mg/L,低于0.5mg/L的国家排放标准.
Xia JinTong;Lu XueFeng;Li Yan;Shao HaoMing
Abstract:使用改性环氧树脂为粘结剂,以5种不同种类的石墨粉为原料制备交流串激式高速电机用高阻炭刷.利用X-射线衍射(XRD)、扫描电镜(SEM)对所研制的高阻炭刷样品的微观结构和形貌进行了测试分析,探讨了成型压力和磨粉粒度等工艺条件对研制的高阻炭刷样品性能的影响.实验结果表明:采用粒径〈75μm的T石墨粉为原料,成型压力为100MPa制备的高阻炭刷样品的体积密度、电阻率、抗折强度、洛氏硬度和电机运行时的火花等级等性能指标与英国摩根公司和日本东洋碳素股份有限公司生产的高阻炭刷相似,使用寿命可达380h.
Huang DanLian;Ceng GuangMing;Huang GuoHe;Hu TianJiao;Jiao Sheng
Abstract:Because of the complexity and uncertainty of producing enzyme, it's difficult to find the optimum condition for microorganism to produce enzyme only through experiments. This paper applied relational analysis to the process of enzyme production from white
Qin Zheng;Li Na;Zhang DaFang;Zou JianJun
Abstract:We made some improvements on the stochastic protocol model presented by Juan M, which was based on Markov Chain. Some necessary states were added to the modified protocol model to make its initial and transition probabilities more precise. Moreover, we co
Li LiJuan;He KeQing;Sun XingMing
Abstract:Based on the curvature, an algorithm for the initial value of a pixel point was proposed. The initial value of the point directional image can be quickly determined according to the curvature varieties along different directions, and its notion was defini
Bai ShuRen;Liu ZhuoYue;Du Peng;Fu YunHong
Abstract:Application systems based on workflow lack flexibility and can not adapt to the varieties of requirements. For this problem, we built a role model as a bridge connecting the organization model and workflow model, and then proposed an improved workflow mod
Abstract:The deficiency of retrieving uncertainty rules with approximation quality was analyzed. According to the characteristics of time-series data,a strategy on data attribute reduction and rule acquisition using the concept of prediction success based on rough
Abstract:The EAOR algorithm for solving symmetric and copositive linear complementarity problems was studied. It is shown that any accumulation point of the iteration generated by the algorithm solves the linear complementarity problem. When the matrix A involed i
Abstract:This paper introduced the graphs based on k_n connecting relations,and studied the coloring of these graphs and FCC by using "folding method".The proof of a necessary condition and an equivalent theorem of FCC was presented.Finally, the relative conjectur
Abstract:After introducing Maculae Duration & Convexity to measure the risk of mortgage-backed securities by the sensibility upon interest-rate , this paper analyzed the limitations using Maculae Duration & Convexity to measure the interest-rate risk of the implie
He FangLong;Zhang ZuoPeng;Fan GuangFa
Abstract:基于一种合理的钢筋和混凝土本构模型,以x,y方向的曲率和截面形心应变为参数,利用数值方法对钢筋混凝土异形柱构件进行非线性全过程分析,得到了弯矩-曲率全曲线(N-M-φ全曲线).在得到N-M-φ全曲线基础上形成钢筋混凝土异形柱非线性分析的基本方程,通过与一般数值分析方法得到的异形柱N—M-φ全曲线进行对比,两者计算结果吻合较好,但该方法概念更加清晰.该研究成果可应用于钢筋混凝土异形柱的非线性有限元全过程分析.
Chen ZhouYi;Yi WeiJian;Zhao GuoFan;Sha ZhePing;Lin LiYan
Abstract:This paper aims at developing a rational design formula to predict the ultimate strength of high strength concrete columns reinforced with concrete filled steel tube (HSCCRST) under axial compression. In order to investigate the failure mode and the ultim
Yang TianChun;Yi WeiJian;He JiShan;Lv ShaoLin;Giovanni;Cascante
Abstract:The dispersion curve of the Rayleigh guided waves has the phenomena of cut-off or truncation under some conditions, which contradicts Rayleigh wave exploration. For this problem, in our opinion, we should consider the leaky modes of Rayleigh waves. This p
Hu XiBing;Shu XingPing;Shen PuSheng
Abstract:The moment-rotation relation of beam-to-column semi-rigid connections was simulated with the three-parameter mechanical model. The calculation formulas of the end moments, the rotation rigidity and the transmission coefficient of beam elements with semi-r
Niu ShunSheng;Chen ChangFu;Xiao ShuJun;Zou YinSheng
Abstract:Long-and-short-piles composite foundation (LSPCF) can fully mobilize the potential of the ground soil. It can also effectively increase the bearing capacity and decrease the settlement of the ground. However, its optimization design has so far not yet bee
Abstract:The approximate trial function used in the Weighted Residuals Method was constructed by the Point Interpolation Method, which used the combination of radial and polynomial basis functions as its basis functions. The shape functions in the trial function p
Luo QingHai;Shang GuangFa;Gong GuangCai
Abstract:This paper gave a thermodynamic analysis on a thermoelectric (TE) heat pump system. Experiments were performed with varying parameters, such as the flow rate and temperature difference of heat mediums, power input. Since the heating coefficient of the TE
Huang GongWu;Zhao XiaoQing;Mi HaiQing;He Bing
Abstract:The dynamic characteristics of a super-high speed surface grinder (150 m/s) were studied. PRO/E was used to set up the 3D geometrical model of each component and Hypermesh was used to set up the 3D FEM model, upon which the whole machine model was establi
Tan LiGang;Yang Jing;Pan ChaoHui;Gong JinKe
Abstract:在分析μC/OS-Ⅱ内核的基本功能基础上,根据需求裁剪μC/OS-Ⅱ功能模块,编写与硬件相关的汇编语言和C语言程序,调整IAR编译系统的库文件,成功地将μC/OS-Ⅱ移植成为排气分析仪内核.通过对排气分析仪功能和界面的分析,确立其任务和优先级,并对开发研究的排气分析仪进行实验确认,全量程测量误差不超过2%.
He YiGang;Lu XiangDong;Liu MeiRong;Chen Xia;Zhou Long;Xie Hong
Abstract:According to the principle of fault detection and diagnosis, the technology of data fusion with neural network was used to deal with a lot of data obtained from fault detection and diagnosis. A new method based on Dempster-Shafer theory of evidence to sol
Xie Yong;Wang YaoNa;Peng Tao;Long YongGong
Abstract:A color printing product is produced by means of multi-color printing. So it is unavoidable to bring about some technical defects between each color printing, such as overprint location deviation. For this problem, an algorithm has been developed to filte
Abstract:研究了求解线性系统的神经网络算法,提出并证明了神经网络算法的收敛性定理,该算法不涉及矩阵的逆运算和除法运算,不受条件αii≠0的限制,对于严重病态的线性系统也能得到高精度解.给出的应用实例验证了算法的有效性.
Zhang GongNa;Zhao Qiong;Liu XiaoWei;Hua XiaoQuan;Luo PiJin
Abstract:To overcome the difficulties in achieving satisfactory fault coverage when testing Multi Chip Module (MCM), MCM was designed by means of testability technology using on-line test technique. According to the characteristics of MCM and its testing requireme
Xiang JianNa;Fan GongLi;Jiang LiHui;Deng XiaoJiang;Long BaiHua;Xiang Li;Yin Xia
Abstract:以二氟碳基锡氧化物(n-C6F13CH2CH2)2SnO,二正丁基锡氧化物(n-C4H9)2SnO和不同结构的芳香羧酸ArCOOH为原料,较高产率(68%~95%)地合成了尚未见文献报道的7种二烃基锡羧酸酯类化合物,并对这些化合物进行了表征.这些化合物属于两种构型{[R2Sn(OOCAr)]2O}2(A)和R2Sn(OOCAr)2(B),在这两类化合物(A)和(B)中,中心锡原子具有不同的配位形式和配位数.
Hu AiXi;He LiMin;Wu GongYan;Luo ChengLi;Cao Gao
Abstract:α-溴-4-甲氧基苯乙酮、α-溴-2-氟苯丙酮、α-溴-4-苄氧基苯丙酮、6-甲氧基-2-(溴乙酰基)萘、6-甲氧基-2-(2-溴丙酰基)萘分别与二乙醇胺、2-氨基-1-丙醇、N-甲基乙醇胺、2-甲基-2-氨基-1-丙醇和甲酸发生非经典Leuckart—Wallach反应,合成相应的2-芳基吗啉,后者经盐酸酸化成盐,得到4-羟乙基-(4-甲氧基苯基)吗啉、盐酸3-甲基-4-羟乙基-(2-氟苯基)吗啉、盐酸3-甲基-4-羟乙基-(4-苄氧基苯基)吗啉、盐酸4-羟乙基-(6-甲氧基-2-萘基)吗啉、盐酸3-甲基-4-羟乙基-(6-甲氧基-2-萘基)吗啉、盐酸3,4-二甲基-2-(6-甲氧基-2-萘基)吗啉、盐酸3,5-二甲基-2-(6-甲氧基-2-萘基)吗啉和盐酸3,5,5-三甲基-2-(6-甲氧基-2-萘基)吗啉.产率为15.6%~58.9%.其结构经^1HNMR,^1H-^1H COSY,IR,MS确证.