On structuring proof search for first order linear logic

Full first-order linear logic can be presented as an abstract logic programming language in Miller's system Forum, which yields a sensible operational interpretation in the ‘proof search as computation’ paradigm. However, Forum still has to deal with syntactic details that would normally be ignored by a reasonable operational semantics. In this respect, Forum improves on Gentzen systems for linear logic by restricting the language and the form of inference rules. We further improve on Forum by restricting the class of formulae allowed, in a system we call G-Forum, which is still equivalent to full first-order linear logic. The only formulae allowed in G-Forum have the same shape as Forum sequents: the restriction does not diminish expressiveness and makes G-Forum amenable to proof theoretic analysis. G-Forum consists of two (big) inference rules, for which we show a cut elimination procedure. This does not need to appeal to finer detail in formulae and sequents than is provided by G-Forum, thus successfully testing the internal symmetries of our system.     

Finding and defining the generators of genus-n objects for constructing topological and cut graphs

The topology of an object is commonly represented through a topological graph or a cut graph (polygonal scheme). Over the past few years, many studies have focused on extracting the topological and cut graphs of complex freeform objects that are represented by meshes. For an object with genus-n, the topological graph has n cycles, while the cut graph contains 2n cycles. These loops, however, do not always explicitly represent the holes in the objects. That is, a cycle in the graph can be a cycle around a solid (meridian), a cycle around a hole (longitude), or almost any combination of the two. The task of classifying the cycles (generators) as cycles around holes (longitude) and cycles around solids (meridians) on the mesh is not straightforward. Every closed orientable 2-manifold with genus-n can be seen as a collection of n toruses stitched together, so that each hole in the object can be referred to as a torus with two generators. This paper proposes a method that extracts the generators from which the longitudes and the meridians are found. The topological graph is defined by the longitudes and by a spanning tree constructed between them. The cut graph is constructed using the same concept. The advantage of the proposed method over other methods is that each loop in the topological graph explicitly represents a hole in the object.     

预合金粉末在切割花岗岩锯片生产中的应用研究

对6种全部或部分加入预合金粉末的金刚石锯片进行了切割试验研究,分析了预合金粉末在胎体中的作用,探讨了某种预合金胎体中金刚石参数设计的合理范围.研究发现,采用湿法冶金工艺制造的ZSF预合金粉末,能够显著提高胎体把持金刚石的能力和胎体的耐磨性;对于雾化法得到的ZWC预合金粉末和ZSF预合金粉末组成的胎体锯片,金刚石浓度为18%时即能够保证有较好的锋利度、耐磨性以及加工质量.     

一种在WORD文档中插入PROTEL图形的方法

本文介绍一种在WORD文档中插入PROTEL FOR DOS图形的方法。本方法操作简便，易于掌握。     

我国铁矿应用充填法开采提出的问题

提出了开采铁矿应用充填法的主要问题。并举例说明充填法与崩落法的方案比较。     

Bürohochhaus im Palais Quartier — ein besonderes Bauprojekt in der Innenstadt von Frankfurt/Main

Dieser Beitrag geht auf die Planung und die Bauausführung des Bürohochhauses des “Palais Quartier” in der Innenstadt von Frankfurt am Main ein. Beschrieben werden die Konstruktion und der Bauablauf des 5‐geschossigen Kellerkastens und der Abfangung eines 12 m × 15 m großen Gebäudeteils sowie die Planung, im Speziellen die Verformungsuntersuchung für die Stahlbetonstützen. Office Tower in the Palais Quartier — a special construction project in the city of Frankfurt/Main. This article covers the design and the construction of the office tower of the ”Palais Quartier“ in the city center of Frankfurt am Main. In the following, the structural design and the construction work of the 5 basement levels and the overhanging part of the building with dimensions 12 m × 15 m and 28 levels will be described. Finally, an analysis of the deformation of the columns will be presented.     

苹果Final Cut Pro输入输出设备及其外部连接

介绍了Decklink采集卡、AJA-IO、Apple FireWire接口等模数转换设备,以及Apple Final Cut Pro编辑系统通过它们与外部设备的连接.详细解释了Final Cut Pro采集预置、回放控制选项的含义.     

FX6型就地风选器在梗签风选中的应用

为降低生产成本,有效地回收利用梗签中夹带的游离烟丝,应用FX6型就地风选器进行了梗签风选试验。结果表明,最佳风选风速为0.8~2.0m/s,除尘风门开度为1.5~2.5格,风选后的梗签含丝率比风选前降低了3.5%~4.0%;风选后的烟丝结构、填充值及纯净度与回收的残烟烟丝相近。将其以≤6%的比例掺配到成品烟丝中,对卷烟的总体质量无负面影响。     

纯棉割绒毛巾的特白整理工艺

采用增白剂VBL在溢流染色机上“皂浴增白”法，并结合上蓝增白，能达到较高的白度，且毛巾的强力、手感均优于复漂增白法。     

卷烟厂风力送丝组合供丝控制系统的开发与应用

介绍并分析了卷烟机风力送丝中主管尾部补风和旁路定风量全补风两种模式的控制方法及其优缺点,提出了风力送丝组合供丝控制技术的原理,该控制方法采用SIENENS的S7-200和S7-300PLC、MP370及PROFIBUS现场总线实现组合供丝。卷烟厂采用风力送丝组合供丝控制系统后,送丝风速控制在(17·5±1·5)m/s,风机电机、变频器选型由原设计的55kW降低到37kW,系统运行稳定,运行费用降低,节能效果达30%左右。