Novel polyimides derived from 2,3,3 ',4 '-benzophenonetetracarboxylic dianhydride

A series of polyimides (PIs) based on 2,3,3',4'-benzophenonetetracarboxylic dianhydride (2,3,3',4'-BTDA) and 3,3',4,4'-BTDA were prepared by the conventional two-step process. The properties of the 2,3,3',4'-BTDA based polyimides were compared with those of polyimides prepared from 3,3',4,4'-BTDA. It was found that PIs from 2,3,3,4'-BTDA have higher glass transition temperature and better solubility without sacrificing their thermal properties. Furthermore the theological properties of PMR-15 type polyimide resins based on 2,3,3',4'-BTDA showed lower melt viscosity and wider melt flow region (flow window) compared with those from 3,3',4,4'-BTDA. The structure-property relations resulted from isomerism were discussed.

Morphology, structure, and rheological property of linear low-density polyethylene grafted with acrylic acid

The chain structure, spherulite morphology, and theological property of LL-DPE-g-AA were studied by using electronspray mass spectroscopy, C-13-NMR, and rheometer. Experimental evidence proved that AA monomers grafted onto the LLDPE backbone formed multiunit AA branch chains. It was found that AA branch chains could hinder movement of the LLDPE main chain during crystallization. Spherulites of LLDPE became more anomalous because of the presence of AA branch chains. Rheological behavior showed that AA branch chains could act as an inner plasticizer at the temperature range of 170-200 degreesC, which made LLDPE-g-AA easy to further process. (C) 2001 John Wiley & Sons, Inc.

Effect and mechanism in compatibilization of poly(styrene-b-2-ethyl-2-oxazoline) diblock copolymer in poly(2,6-dimethyl-1,4-phenylene oxide) poly(ethylene-ran-acrylic acid) blends

The compatibilization effect of poly(styrene-b-2-ethyl-2-oxazoline) diblock copolymer, P(S-b-EOx), on immiscible blends of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) and poly(ethylene-co-acrylic acid) (EAA) is examined in terms of phase structure and thermal, rheological and mechanical properties, and its compatibilizing mechanism is investigated by Fourier-transform infrared spectroscopy. The block copolymer, synthesized by a mechanism transformation copolymerization, is used in solution blending of PPO/EAA. Scanning electron micrographs show that the blends exhibit a more regular and finer dispersion on addition of a small amount of P(S-b-EOx). Thermal analysis indicates that the grass transition of PPO and the lower endothermic peal; of EAA components become closer on adding P(S-b-EOx), and the added diblock copolymer is mainly located at the interface between the PPO and EAA phases. The interfacial tension estimated by theological measurement is significantly reduced on addition of a small amount of P(S-b-EOx). The tensile strength and elongation at break increase with the addition of the diblock copolymer for PPO-rich blends, whereas the tensile strength increases but the elongation at break decreases for EAA-rich blends. This effect is interpreted in terms of interfacial activity and the reinforcing effect of the diblock copolymer, and it is concluded that the diblock copolymer plays a role as an effective compatibilizer for PPO/EAA blends. The specific interaction between EAA and polar parts of P(S-b-EOx) is mainly hydrogen bonding. (C) 1998 Elsevier Science Ltd. All rights reserved.

IN-SITU COMPOSITE - PHENOLPHTHALEIN POLYETHERSULFONE-THERMOTROPIC LIQUID-CRYSTALLINE POLYMER BLENDS

Phase behavior, thermal, theological and mechanical properties plus morphology have been studied for a binary polymer blend. The blend is phenolphthalein polyethersulfone (PES-C) with a thermotropic liquid crystalline polymer (LCP), a condensation copolymer of p-hydroxybenzoic acid with ethylene terephthalate (PHB-PET). It was found that these two polymers form optically isotropic and homogeneous blends by means of a solvent casting method. The homogeneous blends undergo phase separation during heat treatment. However, melt mixed PES-C/PHB-PET blends were heterogeneous based upon DSC and DMA analysis and SEM examination. Addition of LCP in PES-C resulted in a marked reduction of melt viscosity and thus improved processability. Compared to pure PES-C, the charpy impact strength of the blend containing 2.5% LCP increased 2.5 times. Synergistic effects were also observed for the mechanical properties of blends containing < 10% LCP. Particulates, ribbons, and fibrils were found to be the typical morphological units of PHB-PET in the PES-C matrix, which depended upon the concentration of LCP and the processing conditions.

SOLUTION PROPERTIES OF POLYANILINE AND ITS DERIVATIVES

Solutions of polyaniline (PAn), poly(ortho-toluidine) (POT) and poly(ortho-anisidine) (PAs) in N-methyl pyrrolidinone (NMP) were examined by viscometric, gel permeation chromatographic (GPC) and theological methods. Strong intermolecular interaction and molecular aggregation are shown.

一种自治水下机器人垂直面避碰规划方法

为提高自治水下机器人在垂直面跨越坡型、台阶型障碍的能力,提出了一种基于模糊控制的垂直面避碰规划方法。该方法以避碰声纳的输出作为输入,垂直面的深度调节量作为输出,直接建立了从障碍感知到避碰行为的映射。半物理仿真实验表明,该方法有效提高了某型自治水下机器人垂直面操纵性能,具有反应迅速、稳定性好、便于工程实现的优点。

设备维护模式选择决策支持框架研究

给出了设备维护的定义,对设备维护策略进行了分类。对工厂中比较常用的设备维护管理模式进行了比较和分析,指出每种设备维护管理模式的优缺点。最后,根据工厂设备维护管理的发展趋势与需求,提出了设备维护模式选择的决策支持框架,为工厂进行先进的设备维护管理提供决策支持。

地震勘探三维可视化方法研究与实现

This thesis mainly studies the technologies of 3-D seismic visualization and Graphic User Interface of seismic processing software. By studying Computer Graphics and 3-D geological modeling, the author designs and implements the visualization module of seismic data processing software using OpenGL and Motif. Setting seismic visualization flow as the subject, NURBS surface approximation and Delaunay Triangulation as the two different methods, the thesis discusses the key algorithms and technologies of seismic visualization and attempts to apply Octree Space Partitioning and Mip Mapping to enhance system performance. According to the research mentioned above, in view of portability and scalability, the author adopts Object-oriented Analysis and Object-oriented Design, uses standard C++ as programming language, OpenGL as 3-D graphics library and Motif as GUI developing tool to implement the seismic visualization framework on SGI Irix platform. This thesis also studies the solution of fluid equations in porous media. 2-D alternating direction implicit procedure has been turned into 3-D successive over relaxation iteration, which possesses such virtues as faster computing speed, faster convergence rate, better adaptability to heterogeneous media and less memory demanding.

三维油藏数值模拟正反演算法研究

The dynamic prediction of complex reservoir development is one of the important research contents of dynamic analysis of oil and gas development. With the increase development of time, the permeabilities and porosities of reservoirs and the permeability of block reservoir at its boundaries are dynamically changing. How to track the dynamic change of permeability and porosity and make certain the permeability of block reservoir at its boundary is an important practical problem. To study developing dynamic prediction of complex reservoir, the key problem of research of dynamic prediction of complex reservoir development is realizing inversion of permeability and porosity. To realize the inversion, first of all, the fast forward and inverse method of 3-dimension reservoir simulation must be studied. Although the inversion has been widely applied to exploration and logging, it has not been applied to3-dimension reservoir simulation. Therefore, the study of fast forward and inverse method of 3-dimension reservoir simulation is a cutting-edge problem, takes on important realistic signification and application value. In this dissertation, 2-dimension and 3-dimension fluid equations in porous media are discretized by finite difference, obtaining finite difference equations to meet the inner boundary conditions by Peaceman's equations, giving successive over relaxation iteration of 3-dimension fluid equations in porous media and the dimensional analysis. Several equation-solving methods are compared in common use, analyzing its convergence and convergence rate. The alternating direction implicit procedure of 2-dimension has been turned into successive over relaxation iteration of alternating direction implicit procedure of 3-dimension fluid equations in porous media, which possesses the virtues of fast computing speed, needing small memory of computer, good adaptability for heterogeneous media and fast convergence rate. The geological model of channel-sandy reservoir has been generated with the help of stochastic simulation technique, whose cross sections of channel-sandy reservoir are parabolic shapes. This method makes the hard data commendably meet, very suit for geological modeling of containing complex boundary surface reservoir. To verify reliability of the method, theoretical solution and numerical solution are compared by simplifying model of 3-dimension fluid equations in porous media, whose results show that the only difference of the two pressure curves is that the numerical solution is lower than theoretical at the wellbore in the same space. It proves that using finite difference to solve fluid equations in porous media is reliable. As numerical examples of 3-dimension heterogeneous reservoir of the single-well and multi-well, the pressure distributions have been computed respectively, which show the pressure distributions there are clearly difference as difference of the permeabilities is greater than one order of magnitude, otherwise there are no clearly difference. As application, the pressure distribution of the channel-sandy reservoir have been computed, which indicates that the space distribution of pressure strongly relies on the direction of permeability, and is sensitive for space distributions of permeability. In this dissertation, the Peaceman's equations have been modified into solving vertical well problem and horizontal well problem simultaneously. In porous media, a 3D layer reservoir in which contain vertical wells and horizontal wells has been calculated with iteration. For channel-sandy reservoir in which there are also vertical wells and horizontal wells, a 3D transient heterogeneous fluid equation has been discretized. As an example, the space distribution of pressure has been calculated with iteration. The results of examples are accord with the fact, which shows the modification of Peaceman's equation is correct. The problem has been solved in the space where there are vertical and horizontal wells. In the dissertation, the nonuniform grid permeability integration equation upscaling method, the nonuniform grid 2D flow rate upscaling method and the nonuniform grid 3D flow rate upscaling method have been studied respectively. In those methods, they enhance computing speed greatly, but the computing speed of 3D flow rate upscaling method is faster than that of 2D flow rate upscaling method, and the precision of 3D flow rate upscaling method is better than that of 2D flow rate upscaling method. The results also show that the solutions of upscaling method are very approximating to that of fine grid blocks. In this paper, 4 methods of fast adaptive nonuniform grid upscaling method of 3D fluid equations in porous media have been put forward, and applied to calculate 3D heterogeneous reservoir and channel-sandy reservoir, whose computing results show that the solutions of nonuniform adaptive upscaling method of 3D heterogeneous fluid equations in porous media are very approximating to that of fine grid blocks in the regions the permeability or porosity being abnormity and very approximating to that of coarsen grid blocks in the other region, however, the computing speed of adaptive upscaling method is 100 times faster than that of fine grid block method. The formula of sensitivity coefficients are derived from initial boundary value problems of fluid equations in porous media by Green's reciprocity principle. The sensitivity coefficients of wellbore pressure to permeability parameters are given by Peaceman's equation and calculated by means of numerical calculation method of 3D transient anisotropic fluid equation in porous media and verified by direct method. The computing results are in excellent agreement with those obtained by the direct method, which shows feasibility of the method. In the dissertation, the calculating examples are also given for 3D reservoir, channel-sandy reservoir and 3D multi-well reservoir, whose numerical results indicate: around the well hole, the value of the sensitivity coefficients of permeability is very large, the value of the sensitivity coefficients of porosity is very large too, but the sensitivity coefficients of porosity is much less than the sensitivity coefficients of permeability, so that the effect of the sensitivity coefficients of permeability for inversion of reservoir parameters is much greater than that of the sensitivity coefficients of porosity. Because computing the sensitivity coefficients needs to call twice the program of reservoir simulation in one iteration, realizing inversion of reservoir parameters must be sustained by the fast forward method. Using the sensitivity coefficients of permeability and porosity, conditioned on observed valley erosion thickness in wells (hard data), the inversion of the permeabilities and porosities in the homogeneous reservoir, homogeneous reservoir only along the certain direction and block reservoir are implemented by Gauss-Newton method or conjugate gradient method respectively. The results of our examples are very approximating to the real data of permeability and porosity, but the convergence rate of conjugate gradient method is much faster than that of Gauss-Newton method.

Causes of a Divided Discipline: Rethinking the Concept of Cause in International Relations theory

Kurki, M. (2006). Causes of a Divided Discipline: Rethinking the Concept of Cause in International Relations theory. Review of International Studies, 32 (2), 189-216. RAE2008

Etyczny profil "Familiaris consortio"

Artykuł koncentruje się na etycznym aspekcie „Familiaris Consortio”, zakładając równocześnie bogatą problematykę pastoralną. Pytanie etyczne, które pojawiało się wraz z ukazaniem się tego dokumentu wiązało się z nastrojami wahania i oczekiwania w wyniku ujawnienia się silnej opozycji wobec nauki zawartej w encyklice „Humanae Vitae” Pawła VI. Adhortacja nie podejmuje bezpośredniej polemiki z przeciwnikami nauki Kościoła, lecz przedstawia pozytywny wykład całościowej nauki na temat powołania małżeństwa i rodziny. Powołanie stanowi w tym dokumencie podstawową kategorię teologiczno-moralną, wyjaśniającą i uzasadniającą istotne wymogi moralne małżeństwa i rodziny i przenoszącą życie ludzkie na poziom świętości. Powołanie ma swe źródło w Boskim planie zbawienia i objawia się wraz z dokonaniem dzieła zbawienia w Jezusie Chrystusie. Tajemnica powołania uobecnia się w dziejach ludzkości jako ukryta a zarazem objawiona w misterium Chrystusa i Kościoła. Powołanie rzuca istotne światło na stworzenie mężczyzny i kobiety czyli stworzenie rodziny opartej na fundamencie małżeństwa. Odtąd prawda antropologiczna posiada wymiar sakramentalny. Powołanie przenikając wewnętrznie rzeczywistość stworzoną, umieszcza w samej głębi bytu „nie dające się stłumić wezwanie: rodzino, stań się tym, czym jesteś” (FC 17). Bóg Stwórca i Odkupiciel powierzył człowiekowi – mężczyźnie i kobiecie- zadanie budowania rodziny mocą tej samej Miłości, przez którą istnieje świat i człowiek, oraz tej samej Miłości, którą Objawił Syn Boży na Krzyżu, ustanawiając nowy porządek stworzenia. Odtąd prawda życia ludzkiego i prawda miłości musi być odczytywana wyłącznie w świetle tajemnicy Paschalnej. To wezwanie płynące z głębi sakramentu odzywa się mocą łaski w sercu małżeństwa, w sercu męża i żony, którzy są wezwani do miłowania się tą samą Miłością, która płynie z Misterium Krzyża. Ta koncepcja powołania, wypływająca z sakramentalnego charakteru chrześcijańskiego istnienia stanowi klucz do rozstrzygania szczegółowych pytań mogących się pojawić w kontekście życia małżeńskiego. Wizja przedstawiona przez „Familiaris Consortio” jest jednorodna i charyzmatyczna, jest teologiczna i antropologiczna zarazem, dotyczy bowiem człowieka jako człowieka, a nie tylko „pewnych jednostek” ludzkich uwikłanych w sidła małżeńskie. W „Familiaris Consortio” jest jedna norma małżeńska i jedna norma rodzicielska: to jest zawsze ta sama Miłość, która z Serca Boga poprzez sakrament przenika do serca małżonków. Dlatego miłość małżeńska jest miłością rodzicielską, czyli odpowiedzialną za świętość tajemnicy zrodzenia, to jest równocześnie za świętość Boga – Stwórcy i za godność człowieka powoływanego na świat. Zarówno miłość małżeńska jak miłość rodzicielska, nie mogą istnieć bez czystości małżeńskiej. Tu leży prawdopodobnie główna przyczyna powodująca opór wobec nauki „Humanae Vitae”. „Familiaris Consortio” odrzuca wszelką manipulację antykoncepcyjna, podkreślając sprzeczność postawy antykoncepcyjnej nie tylko z prawem Bożym, ale i z istotą człowieczeństwa. Zawiera się to w twierdzeniu, które głosi, że pomiędzy prawidłowym życiem małżeńskim a antykoncepcją zachodzi nie tylko różnica moralna, lecz także antropologiczna (FC 32). Jest to surowy osąd tej praktyki, ale prawdziwy: ci, którzy stosują antykoncepcję, staczają się na poziom poniżej-ludzki.

Megiston agathon (Pl. Ap. 38 a) – Sedno życia i filozoficznego wyzwania Sokratesa

We suggest a certain minimal approach to the historical Socrates on the basis of Plato’s Apology. This text makes it possible to reconstruct the authentic charge and the defense line of Socrates, as well as his motivation and the quintessence of his philosophical challenge. The most important thing is what the philosopher says in the face of his death sentence: that the greatest good for a man is to live an examined life focusing on virtues and ethical values. Unfortunately, the preponderance of studies, even the most recent ones, fail to recognize the philosopher’s provocative challenge, whilst it is not only a crucial motif in the Socratic examining (ἐξετάζειν), i.e. testing the interlocutors’ knowledge by means of irony, elenchos and aporia, but also an inspiration for his direct and indirect followers in seeking virtues and the greatest good.

Egzystencjalna teoria umysłu. Konstrukcja narzędzia pomiarowego

Wydział Nauk Społecznych: Instytut Psychologii

Jam To-morrow and Jam Yesterday, but Never Jam To-day: The of Theology Libraries Planning the Twenty-first Century

The future of theology libraries is far from clear. Since the nineteenth century, theology libraries have evolved to support the work of theological education. This article briefly reviews the development of theology libraries in North America and examines the contextual changes impacting theology libraries today. Three significant factors that will shape theology libraries in the coming decade are collaborative models of pedagogy and scholarship, globalization and rapid changes in information technology, and changes in the nature of scholarly publishing including the digitization of information. A large body of research is available to assist those responsible for guiding the direction of theology libraries in the next decade, but there are significant gaps in what we know about the impact of technology on how people use information that must be filled in order to provide a solid foundation for planning.

History of the Study of Theology

Traces the study of theology from its beginning until the beginning of the 20th century