弱酸性电解水用于提升鲜切马铃薯安全品质的研究

目的 探究弱酸性电解水和自来水处理的鲜切马铃薯在室温贮藏条件下不同时间段内品质的变化。方法 模拟现代厨房贮存模式,经弱酸性电解水和自来水处理的鲜切马铃薯在室温(25±0.5)℃贮藏环境下,贮藏0、7、14、21、28、35h时,检测其感官、色度、质构、淀粉、蛋白质、钾、维生素C、菌落总数、大肠杆菌、沙门氏菌、金黄色葡萄球菌、霉菌、酵母菌。结果 经弱酸性电解水处理的鲜切马铃薯在室温贮藏21 h内,经自来水处理的鲜切马铃薯在室温贮藏14 h内,感官正常,其营养成分淀粉、蛋白质、维生素C、钾元素下降较少,金黄色葡萄球菌、沙门氏菌、菌落总数、大肠杆菌、霉菌、酵母菌的含量均在国家标准和团体标准许可的安全范围内,可安全食用。结论 弱酸性电解水可显著提升鲜切马铃薯的贮藏品质,抑制其金黄色葡萄球菌、沙门氏菌、菌落总数、大肠杆菌、霉菌、酵母菌繁殖,延长室温贮藏期。     

Experimental Evidence for Seed Metabolic Allometry in Barrel Medic (Medicago truncatula Gaertn.)

Seed size is often considered to be an important trait for seed quality, i.e., vigour and germination performance. It is believed that seed size reflects the quantity of reserve material and thus the C and N sources available for post-germinative processes. However, mechanisms linking seed size and quality are poorly documented. In particular, specific metabolic changes when seed size varies are not well-known. To gain insight into this aspect, we examined seed size and composition across different accessions of barrel medic (Medicago truncatula Gaertn.) from the genetic core collection. We conducted multi-elemental analyses and isotope measurements, as well as exact mass GC–MS metabolomics. There was a systematic increase in N content (+0.17% N mg⁻¹) and a decrease in H content (–0.14% H mg⁻¹) with seed size, reflecting lower lipid and higher S-poor protein quantity. There was also a decrease in ²H natural abundance (δ²H), due to the lower prevalence of ²H-enriched lipid hydrogen atoms that underwent isotopic exchange with water during seed development. Metabolomics showed that seed size correlates with free amino acid and hexoses content, and anticorrelates with amino acid degradation products, disaccharides, malic acid and free fatty acids. All accessions followed the same trend, with insignificant differences in metabolic properties between them. Our results show that there is no general, proportional increase in metabolite pools with seed size. Seed size appears to be determined by metabolic balance (between sugar and amino acid degradation vs. utilisation for storage), which is in turn likely determined by phloem source metabolite delivery during seed development.     

Obesity and Bone Health: A Complex Relationship

Recent scientific evidence has shown an increased risk of fractures in patients with obesity, especially in those with a higher visceral adipose tissue content. This contradicts the old paradigm that obese patients were more protected than those with normal weight. Specifically, in older subjects in whom there is a redistribution of fat from subcutaneous adipose tissue to visceral adipose tissue and an infiltration of other tissues such as muscle with the consequent sarcopenia, obesity can accentuate the changes characteristic of this age group that predisposes to a greater risk of falls and fractures. Other factors that determine a greater risk in older subjects with obesity are chronic proinflammatory status, altered adipokine secretion, vitamin D deficiency, insulin resistance and reduced mobility. On the other hand, diagnostic tests may be influenced by obesity and its comorbidities as well as by body composition, and risk scales may underestimate the risk of fractures in these patients. Weight loss with physical activity programs and cessation of high-fat diets may reduce the risk. Finally, more research is needed on the efficacy of anti-osteoporotic treatments in obese patients.     

基于领域本体的Web服务动态组合模型

给出了领域本体、Web服务及服务组合的形式化描述,综合基于业务流程的动态服务组合和基于服务接口匹配的服务组合方法,提出了一种基于领域本体的Web服务动态组合模型。该模型首先把服务请求分解为业务流程,再对业务流程的每个服务按接口匹配方法分解为组合服务。以客户订购产品为例,说明了领域本体的建立方法和Web服务动态组合模型的应用方法。     

服务时间随机条件下服务组合质量分析

本文分析采用业务过程执行语言（BPEL2WS）描述的web服务组合的执行时间,给出在服务执行时间随机情况下,根据单个服务的执行时间概率分布密度和BPEL2WS模型的结构求解web服务组合执行时间的概率分布密度函数的算法。根据概率密度函数可以求得业务过程执行时间在任意时限内的概率,从而可以根据给定的概率条件优化组合服务,使得服务执行成本最低．最后通过一个应用实例验证了算法的有效性。     

Facilitating the Rapid Development and Scalable Orchestration of Composite Web Services

The development of new Web services through the composition of existing ones has gained a considerable momentum as a means to realise business-to-business collaborations. Unfortunately, given that services are often developed in an ad hoc fashion using manifold technologies and standards, connecting and coordinating them in order to build composite services is a delicate and time-consuming task. In this paper, we describe the design and implementation of a system in which services are composed using a model-driven approach, and the resulting composite services are orchestrated following a peer-to-peer paradigm. The system provides tools for specifying composite services through statecharts, data conversion rules, and multi-attribute provider selection policies. These specifications are interpreted by software components that interact in a peer-to-peer way to coordinate the execution of the composite service. We report results of an experimental evaluation showing the relative advantages of this peer-to-peer approach with respect to a centralised one.     

多边形物体的精确B-样条自由变形*

在计算机动画与几何造型中,自由变形是一种重要的几何形状修改方法.该文从移位算子和函数复合的观点探讨一种方法,即当被变形物体用三角片表示、变形工具为B-样条参数体时,变形后的物体可以精确地表示为一组三角Bzier曲面片,其次数为B-样条参数体3个方向的次数之和.此方法的核心在于自由变形是作用在三角片上,而不是顶点上,所以解决了多边形物体B-样条自由变形的点采样问题.     

一种基于角色的分布式动态服务组合方法

服务组合是开放环境中实现跨组织敏捷应用集成的重要技术.许多研究采用集中的服务组合引擎管理组合服务的执行,在系统的可伸缩性、消息传输效率及自治性等方面存在局限.针对集中结构的上述问题,提出一种基于角色的分布式动态服务组合方法,通过划分组合服务的全局流程模型产生各个角色的本地流程模型,从而使得组合服务的控制逻辑及执行负载能够对等地分布到多个结点.讨论了本地流程模型的生成算法及部署与执行机制.模拟实验结果表明,与集中式结构相比,该方法能够更有效地支持大规模并发访问以及大数据量的消息转输,有助于提高组合服务的可伸缩性.     

T-组合Petri网的活性和公平性分析

同步合成是研究复杂Ｐｅｔｒｉ网系统性质的有效途径．文中通过引入可引发变迁序偶的概念,研究了Ｔ－组合（同步合成）Ｐｅｔｒｉ网对子网的活性和公平性继承关系,给出了一组Ｔ－组合Ｐｅｔｒｉ网活或公平的充要条件和充分条件．这些结果对网组合同步设计具有重要的指导意义     

基于AI Planning的Parlay X电信业务设计

Parlay X是一组电信网络服务(WS)应用程序接口(APIs),智能规划可作为一种WS组合(WSC)方法,所以理论上可基于智能规划设计使用Parlay X APIs的电信业务.但WSC有容错和对动作变化推理的要求,电信业务有多种触发方式和异步响应等特性,智能规划要有确定状态等Parlay X不满足的条件.结合典型P...