河北植物新增补属、种与入侵物种新分布

报道了《河北植物志》与《河北高等植物名录》未记录的植物1属3种1变种。其中拔毒散(Sida szechuen-sis Matsuda)、偃狗尾草[Setaria viridis(L.)Beauv. var. depressa(Honda)Kitag.]在河北省首次记录。     

基于Pro/E Manikin的本田节能车人机工程学仿真分析

通过Pro/E搭建的整车CAD模型,利用Pro/E Manikin模块,在人体库中选用与驾驶员体型相一致的人体模型,对其进行人机工程学分析,通过对实验结果的分析、优化,最终使人机工程学研究的驾驶员的坐姿舒适性、视野性能及手伸界面的评价达到设计要求。     

加拿大披碱草与披碱草、圆柱披碱草2个种间杂种F1及其亲本的AFLP分析

以加拿大披碱草(Elymus canadensis L.)与披碱草(E.dahuricus Turcz.)、圆柱披碱草(E.cylindricus(Franch.)Honda)2个种间杂种F1及其亲本为试材,利用AFLP分子标记技术,对2个杂种F1及其亲本的遗传差异性进行比较分析,以期为杂种鉴定及后代选育提供分子依据。结果表明:用筛选出的13个适宜引物共扩增出1247个AFLP位点,其中多态性位点1042个,多态性位点比率高达83.56%;各供试材料的遗传距离(GD)变动在0.4276~0.7486之间,以GD值0.65为基准,5个材料聚为2类,第1类为加拿大披碱草、圆柱披碱草和加拿大披碱草×圆柱披碱草杂种F1,第2类为披碱草、加拿大披碱草×披碱草杂种F1。     

基于ANSYS Workbench的本田节能车车架优化设计

利用有限元方法对本田节能车车架进行静态强度以及运动学仿真分析,运用三维软件Pro/E建立车架CAD模型,通过工程分析软件ANSYS对其进行静态强度分析,获得车架的变形量和强度载荷,检验车架的结构是否合理,并为其改进提供依据。通过改进,在原有基础上尽量符合轻量化的要求,使车架既能满足使用要求又尽量减轻质量,对提高成绩有很大帮助。根据电脑仿真分析的结果,在施加相应载荷的条件下,车架的变形仅为0.3 mm,最大应力为23 MPa,所选材料完全能满足设计及使用要求。经过优化后的车架变形仅为0.08 mm,最大应力仅为15.7 MPa。     

Effects of culture conditions on in vitro bulblet induction in the medicinal plant Amana edulis (Miq.) Honda

Amana edulis (Miq.) Honda is an important medicinal plant with a variety of anti-cancer properties, and it is of great importance to improve its reproductive rate through micropropagation technology to meet increasing demand. In the present study, in order to establish a rapid in vitro bulblet propagation protocol for A. edulis, an L₁₆ (4⁵) orthogonal design was used to investigate the effects of sucrose, 6-benzyladenine (6-BA), α-naphthaleneacetic acid (NAA), and macro-elements on bulblet induction. The results show that the sucrose concentration was the crucial factor for A. edulis bulblet initiation, followed by 6-BA and macro-elements, while NAA had the weakest effect. The optimal medium for in vitro bulblet induction was Murashige and Skoog medium supplemented with 0.1 mg·L^?1 6-BA, 0.01 mg·L^?1 NAA, and 100 g·L^?1 or 80 g·L^?1 sucrose (pH 5.8), in which A. edulis shoot clusters (without roots) were cultured at 5(±2)°C for 35 d or 60 d and then incubated at 23(±2)°C for 90 d. The entire cultivation process occurred in the dark. The present study demonstrates that this protocol can be used for the propagation of A. edulis.