用图解解析法进行运动平面三个有限近位置的机构综合

本文用图解解析方法．建立了极点、镜像点和等角反向规律的数学模型；解决了运动平面三个有限接近位置机构综合的计算机辅助设计问题，并附有计算程序框图和工程设计实例．     

有限状态机实现数字滤波问题的研究

用有限状态机实现数字滤波是数字滤波器设计的一种新方法,它消除了其他设计方法中普遍存在的有限字长效应问题,因而具有很好的稳定性。本文研究了用有限状态机实现数字滤波系统中的系统稳定性、系统的表达、硬件实现以及软件设计等问题。     

一致连续函数的判定

函数的一致连续性是数学分析所讨论的函数的一个重要性质.本文总结了各种区间上一元函数一致连续性的若干个判别方法,帮助读者系统的掌握区间上函数一致连续性的基本知识.为进一步利用函数的一致连续性去解决问题提供强大的理论基础。     

磁水对玉米幼苗生理生化效应的初步研究

用不同磁场强度（０．０５Ｔ、０．１０Ｔ和０．１５Ｔ）的磁水处理玉米种子、幼苗，发现一定磁场强度的磁水能提高叶片中叶绿素含量、硝酸还原酶（ＮＲ）活性，但降低ＩＡＡ氧化酶活性、呼吸速度和电导率．结果表明：磁水具有增强玉米幼苗进行光合作用、氮代谢和抑制ＩＡＡ降解、提高其抗冻性的效应．     

建造合同准则中"营业税金及附加"核算探讨

文章以营业税纳税义务发生的时间和<建造合同>准则中施工企业建造合同收入的确认为切入点,对新准则中有关营业税金及附加的计提与现行营业税法发生纳税义务之间差异的核算作一些探讨.     

柴油机燃油喷射试验系统的动态分析与研究

本文建立了柴油机燃油喷射试验系统的动态特性数学模型，对试验系统的动态响应及其影响因素进行了分析，找出了影响系统工作稳定性的原因，并提出和实施了对试验系统改进和调整的措施，获得了较满意的效果．     

农民增收的政策选择

农民问题的核心是农民增收问题。关心农民、支持农业、发展农村,要推进农业结构调整、整合农村土地资源、加快农村富余劳动力转移等以增加农民收入。     

用粘度法研究石油中沥青质沉积的起始点

介绍了测定混合物粘度以确定沥青质沉积起始点的方法，考察了将正庚烷或甲苯加入油样过程中体系粘度的变化规律．结果发现，随着正庚烷的加入，体系的粘度呈下降趋势，但在某一浓度时出现明显的偏离，该点即被定义为沥青质沉积的起始点．而用甲苯作溶剂时，体系粘度则始终呈平缓下降趋势，无偏离现象研究还发现，各种原油的沥青质沉积的起始点明显早于其相应的减压渣油，这表明渣油胶体体系比原油的更为稳定，上述结果借助显微照相观察得以证实     

Data association based on target signal classification information

In most of the passive tracking systems, only the target kinematical information is used in the measurement-to-track association, which results in error tracking in a multitarget environment, where the targets are too close to each other. To enhance the tracking accuracy, the target signal classification information （TSCI） should be used to improve the data association. The TSCI is integrated in the data association process using the JPDA （joint probabilistic data association）. The use of the TSCI in the data association can improve discrimination by yielding a purer track and preserving continuity. To verify the validity of the application of TSCI, two simulation experiments are done on an air target-tracing problem, that is, one using the TSCI and the other not using the TSCI. The final comparison shows that the use of the TSCI can effectively improve tracking accuracy.     

Wnt-beta-catenin signaling initiates taste papilla development

Fungiform taste papillae form a regular array on the dorsal tongue. Taste buds arise from papilla epithelium and, unusually for epithelial derivatives, synapse with neurons, release neurotransmitters and generate receptor and action potentials. Despite the importance of taste as one of our five senses, genetic analyses of taste papilla and bud development are lacking. We demonstrate that Wnt-beta-catenin signaling is activated in developing fungiform placodes and taste bud cells. A dominant stabilizing mutation of epithelial beta-catenin causes massive overproduction of enlarged fungiform papillae and taste buds. Likewise, genetic deletion of epithelial beta-catenin or inhibition of Wnt-beta-catenin signaling by ectopic dickkopf1 (Dkk1) blocks initiation of fungiform papilla morphogenesis. Ectopic papillae are innervated in the stabilizing beta-catenin mutant, whereas ectopic Dkk1 causes absence of lingual epithelial innervation. Thus, Wnt-beta-catenin signaling is critical for fungiform papilla and taste bud development. Altered regulation of this pathway may underlie evolutionary changes in taste papilla patterning.