砂砾地层中盾构施工壁后同步注浆的模型实验与研究

以北京地铁十号线一期麦子西店站——亮马河站盾构隧道施工为背景,进行了模拟饱和砂砾地层中盾构施工壁后同步注浆的室内模型实验.注浆类型为盾尾同步注浆,浆液为单一的可硬性浆液.通过监测注浆过程中土体表面的位移变化;然后,系统地统计、分析实验所得数据;进而比较9组不同注浆方案的注浆效果,总结规律,最终得出优化的一组注浆方案.     

鞋底敷纸切割机设计研究

针对家庭由于客人造访时换拖鞋而造成的细菌传播等问题,采用在鞋底贴一层粘性纸,并将多余纸片切割下来的方案,设计了一台鞋底自动敷纸、切割机,并通过UG软件进行实体三维建模和装配。该切割机能够更好地解决频繁更换拖鞋而造成的病菌交叉感染以及穿拖鞋不够美观等问题。     

聚（醚—酯）型聚氨酯微孔弹性体鞋底材料

将我元醇和聚酯多元醇的混合,以水为发泡剂,三乙烯二胺和辛酸亚锡的复合物为催化剂,１,４－丁二醇为扩链剂,聚硅氧烷为匀泡剂,可制备聚（醚－酯）型聚氨酯微孔鞋底材料,其物理机械性能优于ＧＢ１０５０８－８９指标,成本比纯聚酯型聚氨酯的低１０－１５％,用正交试验确定的最优配方为：聚醚多元醇６０。聚醌多元醇４０,ＭＤＩ４２,液化ＭＤ１７,扩链剂８,催化剂０．６,匀泡剂０．７,水０．０６。     

Angiotensin I-converting enzyme inhibitory peptide from yellowfin sole (Limanda aspera) frame protein and its antihypertensive effect in spontaneously hypertensive rats

In order to utilize yellowfin sole (Limanda aspera) frame protein, which is normally discarded as industrial waste in the process of fish manufacture, yellowfin sole frame protein was hydrolysed by α-chymotrypsin. Yellowfin sole frame protein hydrolysates (YFPHs) were fractionated into three ranges of molecular weight (YFPH-I, 30–10 kDa; YFPH-II, 10–5 kDa; YFPH-III, below 5 kDa) using an ultrafiltration (UF) membrane bioreactor system. Angiotensin I-converting enzyme (ACE) inhibitory activity was detected on YFPH-III, and the ACE inhibitory peptide (YFP) was purified from YFPH-III using consecutive chromatographic techniques. The YFP with a molecular mass of 1.3 kDa consisted of 11 amino acids, Met-Ile-Phe-Pro-Gly-Ala-Gly-Gly-Pro-Glu-Leu, and its IC₅₀ value was 28.7 μg/ml. Lineweaver–Burk plots suggest that YFP acts as a non-competitive inhibitor to inhibit ACE. Antihypertensive effects of YFP on spontaneously hypertensive rats (SHR) following oral administration was determined as the blood pressure significantly decreased after peptide ingestion.     

Quantitative evaluation of the relationship between dorsal wall length,sole thickness,and rotation of the distal phalanx in the bovine claw using computed tomography

Computed tomography (CT) was performed on 800 untrimmed claws (400 inner claws and 400 outer claws) of 200 pairs of bovine hindlimbs to investigate the relationships between dorsal wall length and sole thickness, and between dorsal wall length and the relative rotation angle of distal phalanx-to-sole surface (S-D angle). Sole thickness was 3.8 and 4.0 mm at the apex of the inner claws and outer claws, respectively, with dorsal wall lengths <70 mm. These sole thickness values were less than the critical limit of 5 mm, which is associated with a softer surface following thinning of the soles. A sole thickness of 5 mm at the apex was estimated to correlate with dorsal wall lengths of 72.1 and 72.7 mm for the inner and outer claws, respectively. Sole thickness was 6.1 and 6.4 mm at the apex of the inner and outer claws, respectively, with dorsal wall lengths of 75 mm. These sole thickness values were less than the recommended sole thickness of 7 mm based on the protective function of the soles. A sole thickness >7 mm at the apex was estimated to correlate with a dorsal wall length of 79.8 and 78.4 mm for the inner and outer claws, respectively. The S-D angles were recorded as anteversions of 2.9° and 4.7° for the inner and outer claws, respectively, with a dorsal wall length of 75 mm. These values indicate that the distal phalanx is likely to have rotated naturally forward toward the sole surface. The distal phalanx rotated backward to the sole surface at 3.2° and 7.6° for inner claws with dorsal wall lengths of 90–99 and ≥100 mm, respectively; and at 3.5° for outer claws with a dorsal wall length ≥100 mm. Dorsal wall lengths of 85.7 and 97.2 mm were estimated to correlate with a parallel positional relationship of the distal phalanx to the sole surface in the inner and outer claws, respectively.     

橡胶鞋底表面处理剂的研制

采用甲基丙烯酸甲酯、丙烯酸接枝改性CR/SBS ,合成橡胶鞋底表面处理剂 ,解决了传统橡胶鞋底粘接强度不大等问题。着重探讨了反应条件对表面处理剂的影响和表面处理剂对橡胶鞋底的处理能力和处理效果。     

双组分低密度聚酯型聚氨酯鞋底原液的研制

以己二酸、乙二醇、一缩二乙二醇和自制的复合催化剂等为原料,合成了聚酯多元醇;进一步以自制的聚酯多元醇和MD I等为原料,制备了双组分低密度聚酯型聚氨酯鞋底原液,并讨论了密度、温度等对鞋底原液性能的影响。应用结果表明,PU鞋底的撕裂强度、耐折性、拉伸强度等性能指标均达到预期的要求。     

鞋底敷层切割机的设计

针对造访他人家庭更换拖鞋麻烦等问题,设计了一种鞋底敷层切割机。利用UG软件对切割机进行了三维设计建模,并通过运动仿真,对机构进行了运动干涉分析。对传动系统进行了详细的设计计算,并选择了电动机。该切割机的设计成功,彻底解决了带鞋套不够美观、对鞋底进行清洁仍会损伤木质地板等问题,极大地方便了客人的造访。     

三维地震技术在泌阳凹陷碱矿勘查中的应用

通过对泌阳凹陷进行三维地震资料解译、层位信息合成、精细解释以及速度场建立,绘制了泌阳凹陷沉积主体寥庄组、核桃园组一、二、三段的底面构造图,得出以下结论:自核一段至廖庄组这一时期,安棚次凹长期存在,但向北西部逐渐萎缩;利用典型界面的地层切片确定了沉积体系特别是白云岩的识别特征,通过对含碱层主要分布的核桃园组自SQ1至SQ4的地层切片、关键井岩芯序列特征和岩性标定工作,确定了地震反射同相轴代表的岩性,进行了沉积微相的解释,也圈定了不同沉积地层（包括含碱岩层）的分布范围。     

一种机器人新型足—掌机构研究和设计

本研究提出了一种适合作为多足爬壁机器人腿的足－掌机构。采用这种足－掌机构的抓壁机器人不仅能够顺利实现地－壁过 渡行走，而且有可能适应其他形状的非平壁面。