性能的改善

• This paper introduces the improving function of flocculant on the sludge sedimentation performance and concentration performance in water supply plant , expounds the nature and flocculation mechanism of the sludge , and analyzes on the different factors influencing the flocculation effect
  介绍了絮凝剂对给水厂污泥沉降性能和浓缩性能的改善作用,简述了污泥的性质及污泥的絮凝机理,分析了不同因素对絮凝效果的影响。
• At first we analyzed the optical network joins the partial wave - length variable pitch point to the network performance improvement and on how reasonable placed in wdm optical network switching nodes in order to achieve better network performance to improve the effectiveness of the study
  本文首先分析了光网络加入部分波长可变节点对网络性能的改善,并对如何在wdm光网络中合理放置转换节点,以达到较好改善网络性能的效果进行了研究。
• The source drain extension ( sde ) structure and its reliability are thoroughly studied . first , it is shown that the sde structure can suppress short channel effect effectively and the parasitic resistance at the sde region has an effect on performance . it is proposed that increasing the dose condition in the sde region can reduce the parasitic resistance and should be adopted to achieve high performance for deep submicron devices
  本文对深亚微米源漏扩展mos器件结构及其可靠性进行了深入研究，首先通过仿真验证了源漏扩展( sde )结构对短沟道效应的抑制， sde区寄生电阻对器件性能的影响以及sde区掺杂浓度的提高对器件性能的改善，指出了器件尺寸进一步减小后，提高源漏扩展区掺杂浓度的必要性。
• By a great number of tests indoors , the theoretic analysis of microstructure and fracture mechanics , tests on the test - road , after the analysis of road - related performances of cement - bound crushed stones base and the study for improvement , the conclusion is put forward , that applying the cement fa - bound crushed stones base can obviously minish the maximal stress of asphalt pavement , lighten and stay cracks in the asphalt pavement effectively and economically so as to improve long - term performances of the structure of pavement
  通过大量室内试验、微观结构和断裂力学理论分析，铺筑试验路段现场检测，分析水泥稳定级配碎石基层的路用结构性能，并研究其路用性能的改善措施，得出水泥粉煤灰稳定级配碎石基层可明显减小沥青面层的最大应力，经济有效的减轻和延缓沥青路面开裂，改善路面结构长期使用性能。
• The result show that steel fiber can improve the toughness of matrix concrete after cracking greatly . investigating the existent studying achievement of evaluation methods of toughness of steel fiber concrete . the limitations of these methods are summarized and the principle of founding up the evaluation method of toughness index of steel fiber concrete is given
  分析结果认为，钢纤维对混凝土的作用突出表现在对基体混凝土裂后韧性性能的改善；系统分析了现有钢纤维混凝土韧性评价方法研究成果，总结出普遍存在的不足及局限性，给出建立钢纤维混凝土韧性指标评价方法所应依循的原则。
• Being based on actual multi - chips module packaging structure a three dimensional thermal analysis model is built , thermal analysis on multi - chips module is conducted using diamond substrate and thermal interfacial materials ; a two dimensional and three dimensional chip - adhesive ? substrate thermal stress model are built , and interfacial thermal stress distributions are computed based on different area ratios and thickness ratios of substrate to chip
  本文根据实际的多芯片组件的封装结构,建立了三维温度场分析模型,分析了金刚石作为导热层和基板对多芯片组件散热性能的改善;建立了二维和三维的芯片-粘结层-基板热力学模型,分析了不同的基板/芯片厚度比和面积比对层间热应力分布的影响。
• Then the coupling beams with new reinforcement layout were made an inquiry into , and the improvement on the seismic behavior by coupling beams diagonally reinforced with a few rows in end regions was found out at last , based on the observations of the experimental phenomena and the analysis of the measurement result , and by the comparison of seismic behavior by making use of hysteretic response , ductility and energy dissipation behavior , a conclusion is presented : the code for design and construction of reinforced concrete high - rise structures ( the draft asked for advise hi 2000 ) ca n ' t ensure that the coupling beams have fairly good seismic ductility ; the result of improvement of the seismic ductility of the coupling beams by the increase hi stirrups besides the strengthen of longitudinal detailing reinforcement was n ' t obvious ; the coupling beams diagonally reinforced with a few rows in end regions have fairly good mechanisms , and the ductility and the behavior of energy dissipation are better than conventionally reinforced concrete coupling beams , so it is suitable to te tised in short coupling beams
  本文通过对三根小跨高比(均为l h = 1 . 0 )剪力墙洞口连系梁在低周反复荷载作用下的试验，了解了严格按《钢筋混凝土高层建筑结构设计与施工规程》 ( 2000年征求意见稿)设计的连梁具有的抗震性能，研究了采取增大连梁配箍量同时加强纵向构造筋的方案对抗震性能的影响，并进一步对新的配筋形式的连梁进行了探讨，了解了在连梁梁端配置多排交叉斜筋方案对连梁抗震性能的改善。通过对试验现象的观察和量测结果的分析，利用荷载?位移滞回曲线、延性和耗能性能等指标对各个试件的抗震性能进行了比较，最后得出结论： 《钢筋混凝土高层建筑结构设计与施工规程》 ( 2000年征求意见稿)不能保证小跨高比连梁具有较好的抗震延性：通过增大连梁配箍量同时加强纵向构造筋的方案对改善连梁的抗震延性的效果不太明显；梁端配置多排交叉斜筋的连梁具有相对较好的受力性能，其延性和耗能性能等各项性能指标均优于普通配筋连梁，宜在深连梁中采用。
• The distribution of modified and unmodified nano - particles in pp were studied by means of tem , it showed that modified nano - particles dispersed much better than the unmodified nano - particles . the improved contribution of nano - particles lead to more ( 3 - pp formed and microscopic damage , all those structural changes caused the improvement of the mechanical properties
  通过tem分析发现经过表面改性后的纳米粒子比未改性的纳米粒子在pp中具有更好的分散性，分散性的改善更有利于诱导- pp的生成以及诱导基体发生剪切屈服形变，正是这种结构上的变化导致了力学性能的改善。
• The paper describes the results of tests of 5 reinforced concrete beam - column interior connections specimens , in which the columns are very strong concrete while the intervening beams are much weaker . the paper describes the difference of the capacity between the connections and the columns and investigates the capacity of the connections when they are strengthened by the shapes . the paper also investigates whether the corresponding provisions of the current code are economical and safe
  本文通过5个高强混凝土梁柱中节点试件试验，了解梁柱混凝土强度等级在不同比值的情况下，节点区的轴心抗压承载力与柱的理论轴心抗压承载力的差异，探讨了节点核心区采用不同数量的型钢加强，对节点区的轴心抗压承载性能的改善情况，验证了我国现行规范有关条款的安全性和经济性，在此基础上提出了节点核心区采用型钢加强后的计算轴心抗压强度的建议公式，计算值和实验值能较好吻合。
• The research on df ( decode - and - forword ) cooperation scheme is proposed aferwrds by analysis and simulation , compared with the af scheme in performance and application . at last after research on cc ( coded cooperation ) cooperation scheme , including original cc and space - time cc , an adaptive space - time coded cooperation scheme , which could more efficiently ultilize the resource of cooperation users , is propsed . simulation results have proved the proposed scheme has better performance than space - time cc both in bit error rate and system throughput
  最后在对编码前传( cc , codedcooperation )协同分集方式中的普通编码协同和空时编码协同的原理和实现方式进行研究的基础上提出了一种基于空时编码协同的对信道具有自适应能力的自适应空时编码协同方法,并分析了这种方法的优越性,通过计算机仿真证明了新方法带来的误码率性能的改善和系统吞吐量的提升。