摘要：Microalgal oils, depending on their degree of unsaturation, can be utilized as either nutritional supplements or fuels; thus, a feedstock with genetically designed and tunable degree of unsaturation is desirable to maximize process efficiency and product versatility. Systematic profiling of ex vivo （in yeast）, in vitro, and in vivo activities of type-2 diacylglycerol acyltransferases in Nannochloropsis oceanica （NoDGAT2s or NoDGTTs）, via reverse genetics, revealed that NoDGAT2A prefers saturated fatty acids （SFAs）, NoDGAT2D prefers monounsaturated fatty acids （MUFAs）, and NoDGAT2C exhibits the strongest activity toward polyunsaturated fatty acids （PUFAs）. As NoDGAT2A, 2C, and 2D originated from the green alga, red alga, and eukaryotic host ancestral participants of secondary endosymbiosis, respectively, a mecha- nistic model of oleaginousness was unveiled, in which the indigenous and adopted NoDGAT2s formulated functional complementarity and specific transcript abundance ratio that underlie a rigid SFA：MUFA：PUFA hierarchy in triacylglycerol （TAG）. By rationally modulating the ratio of NoDGAT2A＇：2C^D transcripts, a bank of N. oceanica strains optimized for nutritional supplement or fuel production with a wide range of degree of unsaturation were created, in which proportion of SFAs, MUFAs, and PUFAs in TAG varied by 1.3-, 3.7-, and 11.2-fold, respectively. This established a novel strategy to simultaneously improve productivity and quality of oils from industrial microalgae.

摘要：消费社会带来了物质的丰盛繁荣,也带来了人性的巨大变化。在观念层面,变化的本质是一种以欲望逻辑为核心的生活方式。考察20世纪上半叶英国文学中的文化观念变迁,观念所依附的介质是一个很重要的分析视角。新的艺术形式、新的媒介创新与传播革命不断涌现,传递出物质富足和鼓励消费的时代信息,也在文化观念的层面促进了一种全新的趣味'追逐'的形成。

摘要：针对传统柑橘园林机器人云台视野范围小、定位精度低等问题,在仿生眼平台上,提出一种基于连续自适应均值偏移(CAM shift)算法和变结构比例-积分-微分(PID)控制器相结合的目标跟踪方法。具体包括效仿人类眼颈的结构特点,设计一个4自由度的仿生眼视觉平台;建立仿生眼的成像模型,提出一种相机外参数自适应标定方法,以解决仿生眼平台外参数会随着相机位姿改变而不断变化的问题;提出基于CAM shift的仿生眼目标跟踪算法,成功实现了对于目标的持续跟踪;为提高仿生眼系统在饱和非线性特性下的动态响应性能,提出采用基于抗饱和(anti-windup)的变结构自适应PID控制器来设计仿生眼控制系统。以柑橘为研究对象,在设计的仿生眼平台上开展实验。结果表明:本文方法左眼平均中心位置像素误差(CPE)为7.2,右眼CPE6.1,均小于设计所要求的CPE10,且每帧图像处理过程小于0.1 s。系统能满足实际应用,具有较高的鲁棒性和准确性。

摘要：以云南省某高速公路花岗岩地层隧道为研究对象,对该隧道地下水、地表水及地下水的补给、径流和排泄条件,地下水类型、流向进行了说明,分别采用水动力学方法、水均衡法进行分析,预测了隧道洞身的最大涌水量。

摘要：陶瓷装饰反映了当时的社会风尚和审美取向。陶瓷装饰艺术是特定社会历史条件的产物。本文从陶瓷艺术装饰的形式和陶瓷艺术装饰的审美分析两个方面展开对中国陶瓷装饰的艺术性研究。

摘要：材料是现代陶艺必备的构成要素之一,现代新型材料的研发和出现,使得现代陶艺在设计和创作上与材料的关系变得更加紧密,由此,基于材料本体语言去探究与分析材料在现代陶艺设计与创作中的作用尤为重要。本文从材料本体语言出发,通过对材料本体语言的解构和分析,探究材料对现代陶艺创作的影响。

摘要：通过总结医用软式内窥镜(简称软式内窥镜)感染与质量控制现状发现,内窥镜钳子管道质量控制缺陷是内镜院感发生的主要原因。基于此,研制具备检测软式内窥镜钳子管道、先端部等精密部件的多功能医用内窥镜质量控制工作站,能够清晰显示内窥镜再处理后钳子管道和精密部件污物残留、损伤等情况,有助于提升内窥镜再处理质量控制,降低医院内窥镜交叉感染。

摘要：固体氧化物燃料电池分布式热电联供技术是建设“清洁、低碳、安全、高效”现代能源体系、提高能源供给、保障能源消费安全的重要途径。氢是固体氧化物燃料电池最主要且最适合的燃料,然而,固体氧化物燃料电池分布式热电联供技术的应用受限于氢储运技术的发展。采用液态甲醇作为储氢载体现场重整制氢,有望在氢源供应问题上实现突破。为研究国内外固体氧化物燃料电池用甲醇水蒸气重整反应器进展,本文概述了氢源供应方式,着重总结了现场重整制氢的核心设备——甲醇水蒸气重整反应器的结构功能和供热方式,分析了影响反应器重整性能的操作参数和结构参数,并介绍了甲醇水蒸气重整反应器与固体氧化物燃料电池集成发电的特点,提出固体氧化物燃料电池用甲醇水蒸气重整反应器未来发展方向包括大功率甲醇水蒸气重整反应器的设计、大功率甲醇水蒸气重整反应器制氢机理及传热传质特性研究,以及采用甲醇水蒸气重整反应器直接为中温固体氧化物燃料电池供氢发电的性能。

摘要：Metastasis is one of the main reasons causing death in cancer *** was reported that chemotherapy might induce *** order to uncover the mechanism of chemotherapy-induced metastasis and find solutions to inhibit treatment-induced metastasis,the relationship between epithelial-mesenchymal transition(EMT)and doxorubicin(DOX)treatment was investigated and a redox-sensitive small interfering RNA(siRNA)delivery system was ***-related reactive oxygen species(ROS)were found to be responsible for the invasiveness of tumor cells in vitro,causing enhanced EMT and cytoskeleton reconstruction regulated by Ras-related C3 botulinum toxin substrate 1(RAC1).In order to decrease RAC1,a redox-sensitive glycolipid drug delivery system(chitosan-ss-stearylamine conjugate(CSO-ss-SA))was designed to carry siRNA,forming a gene delivery system(CSO-ss-SA/siRNA)downregulating ***-ss-SA/siRNA exhibited an enhanced redox sensitivity compared to nonresponsive complexes in 10 mmol/L glutathione(GSH)and showed a significant ***-ss-SA/siRNA could effectively transmit siRNA into tumor cells,reducing the expression of RAC1 protein by 38.2%and decreasing the number of tumor-induced invasion cells by 42.5%.When combined with DOX,CSO-ss-SA/siRNA remarkably inhibited the chemotherapy-induced EMT in vivo and enhanced therapeutic *** present study indicates that RAC1 protein is a key regulator of chemotherapy-induced EMT and CSO-ss-SA/siRNA silencing RAC1 could efficiently decrease the tumor metastasis risk after chemotherapy.

摘要：以DL190—12型柴油机为样机，设计了EGR电子控制系统。硬件设计包括控制单元、数据采集信号处理电路、执行机构驱动电路和显示电路。控制软件采取模块化设计方法。发动机台架实验表明DL190—12型柴油机匹配EGR电子控制系统后，掺烧15％乙醇的NOx排放量比原柴油机下降50％～90％。