语音录入系统在针织成品检验中的应用

介绍纺织面料成品检验语音输入系统的方案设计,通过语音识别与合成技术构建语音录入系统,通过自适应学习提高识别效率。阐述通过成品检验环境噪音测试、验布工人声音采集建立语音系统,以及该系统在语音验布上的应用。经过应用测试显示,使用语音系统代替手写录入可使疵点检验率从57%提升到73%。在针织成品检验中采用语音录入系统能够快速录入疵点信息,提高检验效率,进一步简化验布工操作流程,降低漏验和堵布风险,提高面料整体的质量控制能力。     

天冬多糖的结构、免疫调节活性及体外抗氧化活性

目的:探究天冬多糖的结构特征、免疫调节活性和体外抗氧化活性,为后续天冬多糖研究提供依据。方法:采用水提醇沉法提取天冬粗多糖,Sevage法脱蛋白和分级醇沉法对脱蛋白后的多组分多糖进行分离,苯酚-浓硫酸法测定其糖含量;采用高效凝胶渗透色谱法测定其相对分子质量,高效离子色谱法测定其单糖组成;采用红外光谱法分析其结构;对于均一分子质量的80%醇沉多糖分级产物(以下简称TD-80),采用小鼠脾淋巴细胞和巨噬细胞RAW264.7评价TD-80的免疫调节活性及其相关细胞因子的分泌情况。通过测定DPPH自由基清除能力、超氧阴离子清除能力评价其体外抗氧化活性。结果:天冬粗多糖糖含量为63.13％,天冬脱蛋白冻干粉糖含量达73.98％。不同体积分数乙醇分级醇沉后,80%醇沉产物为均一分子质量的多糖产物TD-80(Mw = 7.3 ku,Mw/Mn = 2.68)。TD-80主要含有7种单糖组成,其中以半乳糖和半乳糖醛酸为主,属于酸性杂多糖。TD-80能促进脾淋巴细胞的增殖,并呈质量浓度依赖关系,对相关细胞因子(TNF-α,IL-1β和IL-6)的分泌有一定的刺激作用,呈现一定的免疫调节活性和抗氧化活性。结论:本方法具有操作简便、结果准确等优点,可为天冬及其它类似药材中多糖的提取、纯化及药理活性研究提供参考。     

基于工作流和Web技术的船舶协同设计平台

随着计算机技术的不断发展,产品设计的工作方式发生了越来越大的变化。异地协同设计为处于松散地域位置的设计人员提供了设计交流平台,并为严密的设计管理提供了可能。主要讨论了基于工作流和Web技术的船舶协同设计平台,从工作流原理入手,分析了系统的组织结构及相关应用程序的集成。     

准八面体CBN单晶的合成研究

通过对原料、触媒及合成工艺的研究,采用国产DS-029B型六面顶压机在4．2—5．3GPa,1350。1470℃的范围内,从hBN-单质触媒体系中合成出近乎完美的黑色八面体和截角八面体立方氮化硼单晶体。确定了该种形态的CBN晶体的生长区域。CBN晶体的尺寸在100—400μm,峰值粒度为125—150μm。对所得的晶体进行考察,发现这种CBN晶体结晶形貌发育比较完整、棱角尖锐、晶粒饱满,并且有较高的抗压强度。上述结果表明所用的单质触媒具有使CBN晶体均匀生长的能力,是一种合成CBN晶体的有效触媒,该种CBN晶体具有较好的破碎强度。     

Flexural failure of unidirectional carbon/epoxy composites: Effects of interleaving and flexural rate

The effects of a low-modulus high-strain interleaf layer, introduced at the midplane, on unidirectional carbon/epoxy laminates under flexural loading were investigated. The apparent energy-to-fail of the laminates increased significantly whereas the maximum load decreased slightly upon interleaving. Real-time microscopic observations during static flexure tests at the lowest deflection rate indicated a dramatic change of failure mode from the dominantly compressive fracture of the baseline laminate to the dominantly tensile fracture process upon interleaving. Failure modes of interleaved and baseline laminates showed no significant changes with test rate in the deflection rate range of 10⁻⁶ to 10⁰ m/sec.     

滚镀导电鞭热缩护套

滚镀在小零件电镀过程中一直占据着主导地位,其导电方式一般分为导电鞭式（俗称象鼻）和导电杆式。长期以来在我国电镀行业两者一直平分秋色,但在发达国家却基本上淘汰了导电杆,是什么原因呢？本文就这个问题进行了探讨。１导电杆的优缺点导电杆最大的特点是不会缠绕,...     

二叔丁基氮氧自由基对AN_MA和MMA的高效阻聚作用

用混浊法和沸腾法分别研究了二叔丁基氮氧自由基(DTBNO)对丙烯腈(AN)及丙烯酸甲酯(MA)、甲基丙烯酸甲酯(MMA)自由基聚合的阻聚作用。结果表明,DTBNO对AN有较强的阻聚作用;DTBNO与对苯二酚(HQ)、苯醌(BQ)、二乙基羟胺(DEHA)等分别组成二元混合物时,其阻聚效果非常明显。当DTBNO-DEHA和DtBNO-HQ的浓度(ppm,下同)比分别为500:1000和1000:500时,对AN的阻聚效果最好;在二元混合阻聚剂中加入适量吩噻嗪(PT),其阻聚效果更佳,如DTBNO-DEHA-PT(500:500:500)在100℃时可使MMA完全终止聚合反应。     

铜/钴纳米多层膜的电化学制备及表征

纳米金属多层膜由于其巨磁电阻性能而受到人们的重视。采用双脉冲控电位技术在单晶硅上沉积铜／钴纳米多层膜。测量了电沉积过程中的阴极极化曲线及电流－时间曲线，确定了沉积电位；利用扫描电子显微技术及X射线衍射技术观察了沉积层的断面形貌及晶体结构。结果表明，沉积层结构清晰、连续，各子层厚度均匀。     

Pd@C3N4 nanocatalyst for highly efficient hydrogen storage system based on potassium bicarbonate/formate

Formate/bicarbonate system has several desirable properties such as noncorrosive and nonirritating nature, as well as facile handling, which make it an attractive candidate for a safe, reversible hydrogen storage material. Herein, Pd nanoparticles supported on mesoporous graphitic carbon nitride (mpg‐C₃N₄) for formate‐based reversible hydrogen storage is reported. The as‐developed Pd/mpg‐C₃N₄ material was shown to be a superior catalyst for the hydrogenation of high concentrations of bicarbonate to formate under mild conditions. The effects of reaction temperature, H₂ pressure, and bicarbonate concentration on the hydrogenation of bicarbonate to formate were investigated. The catalytic performance remained steady with high activity up to six hydrogenation cycles. The interaction between mpg‐C₃N₄ and Pd nanoparticles and the concerted effects of the nitrogen species located at mpg‐C₃N₄ and bicarbonate played a synergetic role in the enhancement of the performance of the catalyst for hydrogenation. © 2016 American Institute of Chemical Engineers AIChE J, 62: 2410–2418, 2016     

Controllable Preparation of Al2O3‐MgO·Al2O3‐CaO·6Al2O3 (AMC) Composite with Improved Slag Penetration Resistance

Compact Al₂O₃‐MgO·Al₂O₃‐CaO·6Al₂O₃ (AMC) composite was obtained by melting technology using industrial alumina, light‐burned magnesia, and quick lime as raw materials based on the Al₂O₃‐MgO‐CaO ternary phase diagram. The results show that the phases of MgO·Al₂O₃ and Al₂O₃ are formed as the main framework with plate‐like CaO·6Al₂O₃ crystals mainly discontinuously embedded in MgO·Al₂O₃. The bulk density of AMC composite is up to 3.42 g/cm³, equivalent to 90.5% of the theoretical density. The synthesized compact AMC composite in the work also exhibits better slag penetration resistance than the castable based on tabular corundum due to the formation of liquid phase.