This paper describes the self—adjustment of some tuning-knobs of the generalized predictive controller(GPC).A three feedforward neural network was utilized to on line learn two key tuning-knobs of GPC,and BP algorith...This paper describes the self—adjustment of some tuning-knobs of the generalized predictive controller(GPC).A three feedforward neural network was utilized to on line learn two key tuning-knobs of GPC,and BP algorithm was used for the training of the linking-weights of the neural network.Hence it gets rid of the difficulty of choosing these tuning-knobs manually and provides easier condition for the wide applications of GPC on industrial plants.Simulation results illustrated the effectiveness of the method.展开更多
The relation between structures and properties of polyurethane are investigated by modern physical and chemical methods.The results obtained are as follows:the effects of the content of self-crosslinking agent on the ...The relation between structures and properties of polyurethane are investigated by modern physical and chemical methods.The results obtained are as follows:the effects of the content of self-crosslinking agent on the properties of polyurethane,i.e.,dispersion stability,dynamical viscoelasticity and mechanical properties are discussed.It is found that the optimum molar ratio of epichlorohydrin and diethylenetriamine is 1:2.A mois-展开更多
The Belt and Road Initiative contains the aspiration of Chinese nation to pursue ideological freedom and desire of strengthening international exchanges and cooperation. This paper takes the Belt and Road Initiative f...The Belt and Road Initiative contains the aspiration of Chinese nation to pursue ideological freedom and desire of strengthening international exchanges and cooperation. This paper takes the Belt and Road Initiative for example,emphasizing the interpretation of the inheritance and development of Chinese culture so as to study the importance of Culture Self-Consciousness in Chinese Philosophy,in the context of English globalization. That is to say,this paper stresses the spirits and the stand of nation 's demonstration on pursuing peace,cooperation and sustainable development in the civilization continuity from traditional China to the contemporary China,with practical philosophic view.展开更多
在无乳化剂情况下,以四甲基四乙烯基环四硅氧烷和乙烯基三甲氧基硅烷为有机硅单体,用甲基丙烯酸甲酯、甲基丙烯酸(钠)和烯丙基羟乙基醚共聚物替代乳化剂,分别采用一步法和二步法制备高硅含量自交联无皂硅丙乳液。通过L9(34)正交试验进...在无乳化剂情况下,以四甲基四乙烯基环四硅氧烷和乙烯基三甲氧基硅烷为有机硅单体,用甲基丙烯酸甲酯、甲基丙烯酸(钠)和烯丙基羟乙基醚共聚物替代乳化剂,分别采用一步法和二步法制备高硅含量自交联无皂硅丙乳液。通过L9(34)正交试验进行配方优化,结果表明,当体系p H值=5±0.5,引发剂[m(K2S2O8)∶m(Na HSO3)=2∶1]用量为单体总质量的0.5%时,单体的最佳配比为:m(MAA)∶m(AOE)∶m(YDH)∶m(V4)∶m(MMA)=8∶9∶4∶20∶59;通过红外光谱分析得知,环硅烷已开环,且所有单体均已参加共聚反应;用TEM、粒径表征和热重分析手段研究了不同配料工艺对乳液稳定性的影响,在相同配方条件下,采用二步法和一步法制备的乳液平均粒径分别为145 nm、158 nm,PDI分别为0.024、0.031,Zeta电位分别为-54.1 m V、-53.9 m V,最大热分解温度分别为479℃、468℃,说明二步法制备的乳液的粒径和热稳定性均优于一步法。在乳液中添加幻彩珠光粉制成的高装饰性隔热涂料隔热性能优越。展开更多
目的探讨宫腔粘连患者宫腔镜下宫腔粘连分离术(transcervical resection of adhesions,TCRA)术后应用Foley球囊+自交联透明质酸钠凝胶预防术后再粘连的临床效果。方法选取我院在2015年12月至2017年11月收治的中重度宫腔粘连患者120例,...目的探讨宫腔粘连患者宫腔镜下宫腔粘连分离术(transcervical resection of adhesions,TCRA)术后应用Foley球囊+自交联透明质酸钠凝胶预防术后再粘连的临床效果。方法选取我院在2015年12月至2017年11月收治的中重度宫腔粘连患者120例,按照随机数字表法分为观察组和对照组,每组各60例;观察组在TCRA术后应用Foley球囊+自交联透明质酸钠凝胶预防再粘连;对照组在TCRA术后应用Foley球囊+普通医用透明质酸钠凝胶预防再粘连。术后3个月观察两组患者临床疗效及AFS评分、粘连范围、粘连类型、月经状况及再粘连状况。结果治疗后观察组临床有效率为86.67%(52/60),对照组临床有效率为71.67%(43/60),比较具有统计学差异(χ2=4.093,P<0.05);术后3个月宫腔镜检查两组患者AFS总分、粘连范围评分、粘连类型及月经状况评分较术前均明显下降(P<0.05);观察组AFS总分、月经状况评分明显低于对照组,差异具有统计学意义(P<0.05);两组患者术后粘连范围、粘连类型比较差异无统计学意义(P>0.05);术后3个月宫腔镜检查,观察组术后再粘连发生率为1.92%(1/52),对照组术后再粘连发生率为16.28%(7/43),比较具有统计学差异(χ2=4.566,P<0.05)。结论宫腔粘连患者TCRA术后应用Foley球囊+自交联透明质酸钠凝胶预防粘连效果显著,能够有效降低AFS评分及月经状况,值得临床推广。展开更多
基金Supported by the National 863 CIMS Project Foundation(863-511-010)Tianjin Natural Science Foundation(983602011)Backbone Young Teacher Project Foundation of Ministry of Education
文摘This paper describes the self—adjustment of some tuning-knobs of the generalized predictive controller(GPC).A three feedforward neural network was utilized to on line learn two key tuning-knobs of GPC,and BP algorithm was used for the training of the linking-weights of the neural network.Hence it gets rid of the difficulty of choosing these tuning-knobs manually and provides easier condition for the wide applications of GPC on industrial plants.Simulation results illustrated the effectiveness of the method.
文摘The relation between structures and properties of polyurethane are investigated by modern physical and chemical methods.The results obtained are as follows:the effects of the content of self-crosslinking agent on the properties of polyurethane,i.e.,dispersion stability,dynamical viscoelasticity and mechanical properties are discussed.It is found that the optimum molar ratio of epichlorohydrin and diethylenetriamine is 1:2.A mois-
文摘The Belt and Road Initiative contains the aspiration of Chinese nation to pursue ideological freedom and desire of strengthening international exchanges and cooperation. This paper takes the Belt and Road Initiative for example,emphasizing the interpretation of the inheritance and development of Chinese culture so as to study the importance of Culture Self-Consciousness in Chinese Philosophy,in the context of English globalization. That is to say,this paper stresses the spirits and the stand of nation 's demonstration on pursuing peace,cooperation and sustainable development in the civilization continuity from traditional China to the contemporary China,with practical philosophic view.
文摘在无乳化剂情况下,以四甲基四乙烯基环四硅氧烷和乙烯基三甲氧基硅烷为有机硅单体,用甲基丙烯酸甲酯、甲基丙烯酸(钠)和烯丙基羟乙基醚共聚物替代乳化剂,分别采用一步法和二步法制备高硅含量自交联无皂硅丙乳液。通过L9(34)正交试验进行配方优化,结果表明,当体系p H值=5±0.5,引发剂[m(K2S2O8)∶m(Na HSO3)=2∶1]用量为单体总质量的0.5%时,单体的最佳配比为:m(MAA)∶m(AOE)∶m(YDH)∶m(V4)∶m(MMA)=8∶9∶4∶20∶59;通过红外光谱分析得知,环硅烷已开环,且所有单体均已参加共聚反应;用TEM、粒径表征和热重分析手段研究了不同配料工艺对乳液稳定性的影响,在相同配方条件下,采用二步法和一步法制备的乳液平均粒径分别为145 nm、158 nm,PDI分别为0.024、0.031,Zeta电位分别为-54.1 m V、-53.9 m V,最大热分解温度分别为479℃、468℃,说明二步法制备的乳液的粒径和热稳定性均优于一步法。在乳液中添加幻彩珠光粉制成的高装饰性隔热涂料隔热性能优越。
文摘目的探讨宫腔粘连患者宫腔镜下宫腔粘连分离术(transcervical resection of adhesions,TCRA)术后应用Foley球囊+自交联透明质酸钠凝胶预防术后再粘连的临床效果。方法选取我院在2015年12月至2017年11月收治的中重度宫腔粘连患者120例,按照随机数字表法分为观察组和对照组,每组各60例;观察组在TCRA术后应用Foley球囊+自交联透明质酸钠凝胶预防再粘连;对照组在TCRA术后应用Foley球囊+普通医用透明质酸钠凝胶预防再粘连。术后3个月观察两组患者临床疗效及AFS评分、粘连范围、粘连类型、月经状况及再粘连状况。结果治疗后观察组临床有效率为86.67%(52/60),对照组临床有效率为71.67%(43/60),比较具有统计学差异(χ2=4.093,P<0.05);术后3个月宫腔镜检查两组患者AFS总分、粘连范围评分、粘连类型及月经状况评分较术前均明显下降(P<0.05);观察组AFS总分、月经状况评分明显低于对照组,差异具有统计学意义(P<0.05);两组患者术后粘连范围、粘连类型比较差异无统计学意义(P>0.05);术后3个月宫腔镜检查,观察组术后再粘连发生率为1.92%(1/52),对照组术后再粘连发生率为16.28%(7/43),比较具有统计学差异(χ2=4.566,P<0.05)。结论宫腔粘连患者TCRA术后应用Foley球囊+自交联透明质酸钠凝胶预防粘连效果显著,能够有效降低AFS评分及月经状况,值得临床推广。
