Eclipse自动重构框架的研究

重构是指在保持程序现有功能的前提下提高程序质量的一种技术。通过对Eclipse的自动重构框架LTK（Language ToolKit）的研究，介绍它的工作原理和各主要插件的功能。并举例说明利用Eclipse的自动重构框架创建新的重构的基本方法。     

发电公司ETS故障原因分析

分析江苏徐塘发电有限责任公司7号机组ETS故障的原因,介绍了应急处理方法,并提出了电源改造的方案。     

基于荧光及紫外光谱法对虾青素与乳清蛋白相互作用的研究

本研究采用分子自组装技术制备虾青素/乳清蛋白纳米复合物,并探究虾青素（Astaxanthin,AST）与乳清蛋白（Whey Protein）之间的分子相互作用机制。选用乳清蛋白（α-乳白蛋白、β-乳球蛋白、浓缩乳清蛋白、牛血清蛋白）与虾青素自组装,通过控制水相蛋白质溶液与有机相虾青素溶液的比例,分别可控形成H聚集体或J聚集体虾青素/乳清蛋白纳米复合物（H/J Aggregates Astaxanthin/Whey Protein Nanocomplexes）。通过动态光散射仪（Dynamic Light Scattering,DLS）测定虾青素/乳清蛋白纳米复合物的粒径均在150~430 nm之间,多分散性指数（Polydispersity Index,PDI）表明分散性良好,电位在?12~?1 mV之间;采用透射电子显微镜（Transmission Electron Microscope,TEM）观察成功制备出的H聚集体或J聚集体虾青素/乳清蛋白纳米复合物呈边缘清晰光滑的近球形结构;紫外可见光谱表明4种蛋白质构建的H聚集体或J聚集体虾青素/乳清蛋白纳米复合物中虾青素H聚集体最大吸收波长λ_max由虾青素单体的λ_max480 nm蓝移至388 nm,虾青素J聚集体最大吸收波长λ_max光谱红移,并显示出519和556 nm左右的并肩峰;通过荧光光谱分析表明由于虾青素聚集体特定的结构使形成的虾青素/乳清蛋白纳米复合物的荧光强度都明显增强,乳清蛋白中疏水性氨基酸及疏水性区域暴露。本研究从虾青素及其聚集体的水分散性和乳清蛋白载体特性两方面探究,为其后续在食品药品领域的开发及应用提供理论依据。     

Digestion and protein metabolism of Trogoderma granarium (Coleoptera: Dermestidae) fed on different barley varieties

The Khapra beetle, Trogoderma granarium Everts, is one of the most important pests of grains which rapidly infests durable stored products in hot and dry conditions. In the current study, effects of omit ten varieties of barley (Abidar, Bahman, Line20, Line22, Line30, Lisivi, Lokht11, Makuyi, Sahand and Sahraa) were determined on digestive enzymes and protein metabolsim of T. granarium larvae under laboratory conditions as 33 ± 1 °C, 65 ± 5% RH and photoperiod of 14:10 (L: D) h. The highest and the lowest activities of α-amylase were observed in T. granarium larvae fed on Line30 and Lisivi varieties, respectively but the glucosidases showed the highest activities followed by feeding on Lokht 11. Also, the latter variety caused the highest lipase activity in the larvae while Abidar, Line20, Lisuei and Sahand imposed the lowest lipase activity. The highest activities of serine proteases including trypsin, chymotrypsin and elastase were detected in the larvae fed on Line 30 but the two exopeptidases, amino- and carboxypeptidases, showed the highest activities when the larvae fed on Lisuei. All the three aminotransferses had the highest activities in the larvae fed on Lokht 11 as the related individuals contained the maximum amount of protein compared to other ones. Results of the current study highlighted Line30 as the most suitable variety to be digested by serine proteases and α-amylase but Lokht11 is appropriately digested by glucosidases and lipase which emboss their susceptibilities to T. granarium. Our findings on digestion and protein metabolism imply on susceptibility of varieties Line30 and Lokht11 to T. granarium larvae.     

Taurine ameliorates alcoholic steatohepatitis via enhancing self-antioxidant capacity and alcohol metabolism

Chronic alcohol consumption or alcohol abuse is the main cause of alcoholic steatohepatitis or further cirrhosis. This study was to exam if the antioxidant capacity and alcohol metabolism in livers of chronic alcohol-fed rats were improved by supplementing taurine (Tau). Rats were randomly divided into four groups with five times per week of treatment: 1) isocaloric solution; 2) 3 g alcohol/kg BW/day; 3) 3 g alcohol/kg BW/day + 1 g taurine (Tau)/kg BW/day; and 4) 3 g alcohol/kg BW/day + 2 g Tau/kg BW/day. A 6-week alcohol consumption resulted in lower (p < 0.05) body weight gain and self-antioxidant capacities, as well as increased (p < 0.05) liver size, serum/hepatic lipids, and AST and ALT values. However, alcohol-fed rats co-treated with Tau have decreased (p < 0.05) liver lipid levels via increasing fecal lipid output and cholesterol metabolism. Besides, co-treatment of Tau also enhanced (p < 0.05) self-antioxidant capacities and alcohol metabolism in livers via enhancing GSH contents, CAT, GSH-Px, ADH, and ALDH activities, but decreasing MDA contents. In a histological examination of rat liver, microvesicular steatosis and necrotic cells were observed in alcohol-fed rats without Tau while largely suppressed microvesicular steatosis and no necrotic cells were observed in alcohol-fed rat supplemented with Tau. Therefore, Tau could be an effective hepatoprotective agent against alcohol-induced damage via enhancing self-antioxidant capacity and alcohol metabolism.     

外加剂对海泡石-水系统流动性能的影响研究

研究了碳酸钠、腐植酸钠、AST陶瓷减水剂及UNF-5高效减水剂对海泡石-水系统流动性能的影响，确定了系统流动性能较好时合适的外加剂为腐植酸钠和AST陶瓷减水剂，合适的加入量均在0．15%左右，此时所测ξ-电势最大。海泡石-水系统静置时，会导致泥浆ξ-电势的提高。     

食品级纳米二氧化硅对小鼠器官功能影响的研究

目的:通过测定小鼠连续性口服食品级纳米二氧化硅（Nano silicon dioxide,Nano-SiO₂）12周后血清及肝、肾、睾丸组织中硅元素的含量,并对小鼠肝肾等器官进行观察,初步评价纳米二氧化硅对机体的安全性。方法:将雄性昆明小鼠随机分为对照组（0.05%BSA）、纳米SiO₂低剂量组（100 mg/kg/day）、中剂量组（500 mg/kg/day）、高剂量组（1000 mg/kg/day）和微米SiO₂组（1000 mg/kg/day）,各组按上述剂量分别连续灌胃二氧化硅84 d后全部处死,利用HE染色观察各组动物的肝脏、肾脏、睾丸等组织病理学变化;ICP-OES检测血清及肝、肾、睾丸组织中硅元素的含量;检测各组动物血清中的谷丙转氨酶（ALT）、谷草转氨酶（AST）和尿素氮（BUN）的含量。结果:病理学观察在纳米低、中、高剂量组均发现肝脏、肾脏和睾丸组织有形态上的异常改变,以高剂量组更严重;纳米组血清中ALT、AST和BUN的含量均显著增高（p<0.01或p<0.05）;同时在血清及肝、肾、睾丸组织中纳米组的硅离子含量增高并呈现剂量依赖性;上述指标中同等剂量纳米组和微米组相比,纳米组含量高且病理变化更明显。结论:较长时间口服摄入食品级纳米二氧化硅可能在机体的肝脏、肾脏、睾丸等脏器内蓄积,造成一定程度的肝脏、肾脏等的病理学损害并影响其功能。长期多量食入纳米二氧化硅可能会对机体造成不良影响。      

基于混合图表示的软件变更预测方法

软件变更预测旨在识别出具有变更倾向的模块, 可以帮助软件管理者和开发人员有效地分配资源, 降低维护开销. 从代码中提取有效的特征在构建准确的预测模型中起着重要作用. 近年来, 研究人员从利用传统的手工特征进行预测转向具有强大表示能力的语义特征, 他们从抽象语法树(abstract syntax tree, AST)的节点序列中提取语义特征构建模型. 但已有研究忽略了AST的结构信息以及代码中丰富的语义信息, 如何提取代码的语义特征仍然是一个具有挑战性的问题. 为此, 提出一种基于混合图表示的变更预测方法. 该模型首先结合AST、控制流图(control flow graph, CFG)、数据流图(data flow graph, DFG)等结构信息构建代码的程序图表示, 接着利用图神经网络学习出程序图的语义特征, 根据该特征预测变更倾向性. 所提模型能够融合各种语义信息以更好地表征代码. 在多组变更数据集上开展与最新变更预测方法的对比实验, 验证了所提方法的有效性.     

基于重子节点抽象语法树的软件缺陷预测

在实际软件项目开发过程中,软件缺陷预测能辅助测试人员找到项目中可能存在缺陷的位置,并通过抽象语法树（AST）获取项目模块中隐藏的结构和语义信息,此类信息有助于提高缺陷预测精度。提出基于重子节点抽象语法树的缺陷预测方法,在提取节点信息时保留节点的类型信息和对应代码语义的值信息,并使用特殊字符串代替没有值信息的节点。通过树链剖分思想将AST分割为重子节点和轻子节点,优先选择重子节点作为序列化向量中的节点,同时利用深度学习网络学习节点序列中的源代码结构和语言实现软件缺陷预测。实验结果表明,与DFS方法相比,该方法在基于注意力机制的循环神经网络深度学习模型上的F1值和AUC值平均提升约3%和4%,具有更好的缺陷预测效果。     

AST液相掺杂对低电阻率、高抗电强度BaTiO3半导瓷显微结构及电性能影响

通过改变低电阻率BaTiO3半导体陶瓷中液相添加剂AST的含量，采用XRD和SEM显微分析方法研究了AST含量对低电阻率，高抗电强度BaTiO3半导体陶瓷显微结构的影响，研究结果指出，BaTiO3半导体陶瓷中AST的引入量对晶界厚度的控制存在两个临界点，晶界厚度对低电阻率，高抗电强度BaTiO3半导体陶瓷的显微结构和电性能产生重要影响。