Regulation Law of Turbine and Generator in Organic Rankine Cycle Power Generation Experimental System

In the performance experiment of organic Rankine cycle power generation experimental system, the loadresistance-regulation method is one of the most important regulation methods. However, the regulation law has not been clear enough to guide the experiment, which is unfavorable to the experimental research on organic Rankine cycle. In this paper the regulation law of turbine and generator by the load-resistance-regulation method is studied theoretically and experimentally. The results show that when the thermal cycle parameters keep constant, the turbine speed increases with the increase of load resistance and there is a maximum value of transmission-generator efficiency with the variation of the turbine speed; when the turbine speed and generator speed keep constant, the transmissiongenerator efficiency decreases and gradually tends to zero with the increase of load resistance.

Life Cycle-Stages in History of Tourism in the Republic of Macedonia

The aim of this paper is to explore the historical development of tourism through identified stages of the life cycle （TALC） model. Many of the major destinations in the world have a far longer history and go through various successive cycles with different phases. In this article, we present the case of Macedonia, as a Balkan mainland tourist destination. The analysis is based on primary and secondary data sources for an extended period. The article shows the life cycle of the tourist destination in combination and adaptation of new TALC model that matches regulation theories and the Ford paradigm of global model for tourism development of mass production and consumption. Finally, the paper suggests and recommends practical advice aimed at motivating key players in the formation of economic policy for tourism development.

Variation law of microscopic pore of loess-like soil after several freeze-thaw cycles in seasonal frozen soil region

In seasonal frozen soil region,the engineering geological properties of loess-like soil will be deteriorated after freeze-thaw cycles.Through the freeze-thaw cycle experiment of remolded loess-like soil,under different freezing temperatures,the authors carried out freeze-thaw cycle tests for 3 times and 20 times,respectively.With mercury intrusion porosimetry and granulometric analysis,from the micro-structure,the authors studied the law that freeze-thaw cycle times and frozen temperature effect on the variation of microscopic pore of loesslike soil.This result can provide theoretical basis for comprehensive treatment of problems in the construction of the project in seasonal frozen loess-like soil region.

Comparative population genomics reveals glacial cycles to drive diversifications in tropical montane birds(Aves,Timaliidae)

Many bird species are specialized to live in the broadleaved,evergreen forests in the mountain regions in Southeast Asia.These mountain habitats are not continuously distributed as the different mountain areas are separated by lowlands,which has restricted gene flow and thus contributed to the high biological diversity in this region.The degree of connectivity between mountain areas has fluctuated with the Pleistocene glacial cycles,being largest during the glaciations when the mountain forests spread to lower elevations.Here we study how the intermittent periods of restricted gene flow and connectivity between the populations of five montane species of babblers(Aves,Timaliidae)in Vietnam may be traced in their genomes.The results suggest that the babbler species in the Central Highlands have been isolated from their sister-populations in northern Vietnam for between ca.585 and 380 ky.For two species with populations in both the Central Highlands and the Da Lat region,we found that these split at more or less the same time(440–340 kya).We also found a significant statistical correlation between the time of the splits of these populations and the lowest altitude at which they are known to occur(no similar correlation was found with the geographic distances between populations).The populations in northern Vietnam show higher genetic variation than their counterparts in South-Central Vietnam,supporting the postulate that smaller populations may have lower genetic variation than larger.In accordance with this,we found the lowest genetic variation in the two species with the smallest populations in the Central Highlands.These two populations also show low levels of genomic heterozygosity.Our results show that the south-central populations of the studied babbler species are genetically distinct from their sister-populations in northern Vietnam,providing additional argument for the long-term protection of the evergreen mountain forests in Southeast Asia.

Carnot Factor of a Vapour Power Cycle with Regenerative Extraction

The present paper describes the energy analysis of a regenerative vapour power system. The regenerative steam turbines based on the Rankine cycle and comprised of vapour extractions have been used industrially since the beginning of the 20th century, particularly regarding the processes of electrical production. After having performed worked in the first stages of the turbine, part of the vapour is directed toward a regenerative exchanger and heats feedwater coming from the condenser. This process is known as regeneration, and the heat exchanger where the heat is transferred from steam is called a regenerator (or a feedwater heater). The profit in the output brought by regenerative rakings is primarily enabled by the lack of exchange of the tapped vapour reheating water with the low-temperature reservoir. The economic optimum is often fixed at seven extractions. One knows the Carnot relation, which is the best possible theoretical yield of a dual-temperature cycle;in a Carnot cycle, one makes the assumption that both compressions and expansions are isentropic. This article studies an ideal theoretical machine comprised of vapour extractions in which each cycle partial of tapped vapour obeys these same compressions and isentropic expansions.

Influences of across-strike heterogeneous viscosity on the earthquake cycle in a three-dimensional strike-slip fault model

Geodetic observations have shown that there exist large differences in the viscosity of the deep lithosphere across many large strike-slip faults.Heterogeneity in lithospheric viscosity structure can influence the efficiency of stress transfer and thus may have a significant effect on the earthquake cycle.Until now,how the lateral viscosity variation across strike-slip faults affects the earthquake cycles is still not well understood.Here,we investigate the effects of across-strike viscosity variation on long-term earthquake behaviors with a three-dimensional strike-slip fault model.Our model is a quasi-static model which is controlled by the slip-weakening friction law and powerlaw rheology.By comparing with the reference case,we find that low viscosity on one side of the fault results in a smaller rupture area but with a higher Coulomb stress drop on the ruptured fault region.In addition,low viscosity also leads to a small Coulomb stress accumulation rate.These combined effects increase the earthquake recurrence interval by approximately 10%and the earthquake moments by about 30%when the low viscosity is related to a geothermal gradient of 30 K/km.In addition,across-strike viscosity variation causes asymmetric interseismic ground surface deformation rate.As the viscosity contrast increases,the difference in the interseismic ground surface deformation rate between the two sides of the fault gradually increases,although the asymmetric feature is not pronounced.This asymmetry of interseismic ground deformation rate across a strike-slip fault is supposed to result in asymmetric coseismic deformation if the long-term plate motion velocity is invariant.As a result,this kind of asymmetry of interseismic deformation may influence the evaluation of potential earthquake hazards along large strike-slip faults with lateral viscosity contrast.

On the Combination of “The Textual Research on Historical Documents” and “The Comparative Study of Historical Data” —— and a Discussion on “The Law of Quan-ma and Gui-mei” in Chinese Language Studies

In Chinese language studies, both “The Textual Research on Historical Documents” and “The Comparative Study of Historical Data” are traditional in methodology and they both deserve being treasured, passed on, and further developed. It will certainly do harm to the development of academic research if any of the two methods is given unreasonable priority. The author claims that the best or one of the best methodologies of the historical study of Chinese language is the combination of the two, hence a new interpretation of “The Double-proof Method”. Meanwhile, this essay is also an attempt to put forward “The Law of Quan-ma and Gui-mei” in Chinese language studies, in which the author believes that it is not advisable to either treat Gui-mei as Quan-ma or vice versa in linguistic research. It is crucial for us to respect always the language facts first, which is considered the very soul of linguistics.

The Centenary of the CPC: Leading the Times by Grasping the Laws and Trends of Historical Development

Discussions on grasping the laws and trends of historical development take a fundamental theoretical position in the scientific system of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era.Xi Jinping’s important statements have systematically answered such questions as what type of laws and trends of historical development should be followed,how did the Party follow the laws and trends of historical development in its centennial history,and how should the laws and trends of historical development be followed in a new era.The birth of the Communist Party of China(CPC),the victory of China’s War of Resistance against Japanese Aggression,the founding of the People’s Republic of China,and the unveiling of a new era for reform and opening up and socialism with Chinese characteristics are all the results of grasping the laws and trends of historical development.Over the past century,the Party has followed the laws and trends of historical development and continuously advanced the sinicization of Marxism on the basis of adhering to the unification between truth and values.In pursuit of“putting people first,”the Party has courageously been reforming itself and made relentless progress in the great endeavor of Party building.History shows that a keen appreciation of the laws and trends of historical development is an important sign of political maturity for a proletarian party.Only by applying Marxism according to current times and conditions will we keep abreast with the laws and trends of historical development.We should establish a broader concept of history and identify the laws and trends of historical development from the interactions and linkages between China and the rest of the world.We must recognize and promote the outstanding role of great leaders in steering the country in line with the laws and trends of historical development.

On the analysis of the high-resolution sequence stratigraphy and coal accumulating law of jurassic in Ordos Basin

The strata of Jurassic was divided into three tectonic sequences and eight se- quences of third rank,according to the developing feature of the tectonic inconformity and the transforming feature of the depositional system tracts.Also the identification and the division of the base-level cycle of different period were carried through.Therefore three cycles of super period,eight cycles of long period,twenty-four cycles of middle period and some cycles of short period were identified.From the overall character of the coal-accu- mulation in the Mesozoic,we can see that the Yan'an formation is of the best nature of coal bearing.When the coal bearing systems of Jurassic were depositing,the Ordos area is the coal accumulating basin of terrene of large scale and located in the same tectonic unit.But the local structure of different part and the paleolandform are different in the basin which resulted in the difference of the depositional environment.So the layer number and the distribution of the thickness of the coal beds are different in the different part of the ba- sin.The coal-accumulating action migrated regularly along with the development,evolve- ment and migration of the depositional systems.The layer numbers of the coal beds, which can be mined,are more in the north and west fringe of the basin,whose distributing area is extensive,and they are more steady in the landscape orientation,also the total thickness is great.Therefore the nature of coal bearing and the coal-accumulating action of different part changed obviously in the space in Ordos area.

The Metamorphic and Deformational History of a Continental Collision Zone and its Geodynamic Process——as Evidenced by Qinling Complex,Western Henan,China

The Qinling orogenic belt is a collision zone between the North China and Yangtze cratons. The Qinling Complex is a Precambrian metamorphic complex, developed in the inner zone of the orogenic belt , which records the metamorphic and deformational history and PTt path of the regional meta-morphism of the collision zone . The present paper studies the metamorphic and deformational history and the PTt path of various tectono-metamorphic cycles in order to describe the geodynamic processes prevailing in that part of the Qinling orogenic belt since Proterozoic.The tectonometamorphic history and evolution of the Qinling Complex is divided into two stages: the stage of formation and the stage of modification During the stage of formation dated as Proterozoic,three deformational sequences are recognized. The amphibolite facies regional metamorphism is earlier than or synchronous with the first or second phase of folding. Three metamorphic zones, i.e. And-Ms ,Sil- Ms, Sil Kfs are delimited. During the stage of modification , the emplacement of Caledonian granite , superimposed thermal aureole (garnet K feldspar zone )and the development of ductile shear zones are major events.Metamorphic reactions are reconstructed in terms of analysis of re-equilibrium textures. Geothermobarometric calculations are conducted to calibrate the PT conditions of metamorphism .The metamorphic PTt paths have been estabh'shed. The PTt path of the Proterozoic tectonometamorphic cycle shows a clockwise pattern and is characterized by prominent decompression. The PTt path of the Caledonian tectonometamorphic cycle is characterized first by PT rising ,then isothermal decompression (rapid uplift), and finally by isobaric cooling The PTt path of the two tectonometamorphic cycles evidence the geodynamic processes: two major stages of collision and uplift in the Proterozoic and Caledonian Hercynian periods, respectively, during the evolution of Qinling orogenic belt.

Calculating the Refrigeration Coefficient by Using the Second Law of Thermodynamics

Refrigeration coefficient, ε, is usually calculated by using the First Law of Thermodynamics. In this paper, a new derivation process is introduced through the combination of the Second Law of Thermodynamics with the First Law of Thermodynamics. As a result, two new calculation equations for refrigeration coefficient are proposed. One equation is equivalent to the common method, but its form is a little complicated for real calculation. Another equation is the further simplification, and can be used to calculate the refrigeration coefficient instead of common method with a oermit error.

General Aspects of Financial Law

The aim of this article is to outline the general parts of the legal branch called financial law. It is intended as the first part of a series of articles outlineing the topic in detail. The aim of the submitted contribution is to demonstrate that the financial and legal aspects created the basis of economic development of the regions from the early beginnings of human society. Social relations constituting the subject-matter of the financial law had been developing, changing, and had become established before the financial law itself has been constituted. These relations seem to have been present from the very beginning of the existence of the human society. Regulatory acts associated with regulation of these relationships embodied solidarity and methodological specificities. The specificity of the subject-matter of regulation, solidarity and methodological specificities of the financial, and legal standards sufficiently define superstructure with a natural law character. The superstructure is based on constitutional system of national states after the EU integration has been completed on the EU law. As we can evaluate retrospectively, the transfer of fmanciallaw competencies in Brussels was a failiure. Since the political union was established through the Lisbon treaty in 2009 the European sovereign debt crisis emerged and ravaged the EU until today.

The Lynx and Hare Data of 200 Years as the Nonlinear Conserving Interaction Based on Noether’s Conservation Laws and Stability

We applied n-variable conserving nonlinear differential equations (n-CNDEs) to the population data of the 10-year cycles of Canadian lynx (1821-2016) and the snowshoe hare (1845-1921). Modeling external effects as perturbations to population dynamics, recovering and restorations from disintegrations (or extinctions), stability and survival strategies are discussed in terms of the conservation law inherent to dynamical interactions among species. The 2-variable conserving nonlinear interaction (2CNIs) is extended to 3, 4, ... n-variable conserving nonlinear interactions (n-CNIs) of species by adjusting minimum unknown parameters. The population cycle of species is a manifestation of conservation laws existing in complicated ecosystems, which is suggested from the CNDE analysis as a standard rhythm of interactions. The ecosystem is a consequence of the long history of nonlinear interactions and evolutions among life-beings and the natural environment, and the population dynamics of an ecosystem are observed as approximate CNIs. Physical analyses of the conserving quantity in nonlinear interactions would help us understand why and how they have developed. The standard rhythm found in nonlinear interactions should be considered as a manifestation of the survival strategy and the survival of the fittest to the balance of biological systems. The CNDEs and nonlinear differential equations with time-dependent coefficients would help find useful physical information on the survival of the fittest and symbiosis in an ecosystem.

Subjectivities of the Scientific Endeavor:Noting the Illusion of Objectivity in the History of Science and Medicine

The history of science and medicine has long been steeped in the notion that they are objective(untainted by the philosophical and ideological ebbs and flows of society)and utilitarian(doing what is best for the greater good).Because of this,scientific and medical epistemologies and praxis are often held to an esteem that is unquestioned,celebrated,and occasionally unchecked.A closer look at the history of science and medicine,however,readily reveal the extent to which the milieu of society has informed scientific and medical endeavors.As such,an understanding of how the subjectivities of scientific and medical endeavors situate within our contemporary disciplines and practices is significant to one’s ability to truly understand said disciplines.Likewise,such an evaluation will provide insight into our role in perpetuating the illusion of objectivity in these fields.With this in mind,this paper provides a philosophical and historical examination of the concept of objectivity(in contrast to subjectivity)in science and medicine.

习近平法治思想中的“中华法系”概念

中华法系萌生发展于中华大地,为千百年来国家治理与社会运行作出了重要贡献。但作为一个法学概念,“中华法系”发端于19世纪末传入中国的“法族”概念,其内涵在中华民族艰辛探索法治道路过程中经历了长期建构与重构。法系与法律系统、法律体系,法律、道德及其相互关系,发展方向、未来命运及其决定因素是“中华法系”概念演进过程中形成的基本论题,最终表达的是中国法治的过去和未来如何在法治实践中获得存在的意义。“中华法系”概念百余年演进历程中围绕基本论题展开的讨论,表征着概念本身所具有的民族性、实践性与时代性。习近平总书记全面回顾了“中华法系”概念的演进历程与基本论题,深刻揭示了其丰富的制度内涵、思想内涵与文明内涵,并赋予其新的时代意义。习近平法治思想中的“中华法系”概念具有鲜明的主体性、范式性、引领性,是具有标识意义的重要概念。

超越范式之争——文史哲法学的前提、立场与展望

文史哲是中国文化鲜明的标志性特征。笔者尝试提出的文史哲法学,既是立足于中国传统与实践,又是面向世界的具有普遍性样态的法学范式,理应成为建构中国自主知识体系和话语体系的法学目标。有别于教义法学和社科法学的研究旨趣,文史哲法学是一种全新视角的法学研究范式,它倡导厚植于中国的文史哲传统。其中,文学是法学素材的来源,史学是法学精神的见证,哲学则是法学价值的终极追求。文史哲法学旨在沟通中国历史传统与当下实践,侧重将文史哲作为工具和视角来研究人文与法学的互动关系,将人文价值和生活实践统一于法学研究场域之内,在保持统一性的前提下追求普遍性与实践性向度。中华法治文明在保持其独立个性、赋能文化自信的同时,也能为纾解人类的法律工具主义困境提供中国方案,促使法学脱离封闭的教条式思维模式与理论的窠臼,进而更好地为中国法学的本土化发展奠定坚实基础。

我国刑事诉讼法典编纂的历史智慧

我国古代虽无专门的刑事诉讼法典,但法典编纂的历史智慧依旧博大精深。自周代区分狱、讼开始,有关刑事诉讼的立法愈发精进,其重要成果分布于各个历史时期具有代表性的法典当中。在体例上,立法者以高超的“提取公因式”技术实现了总则制定,以精妙的编纂技巧完成了由繁至简的体系化过程;在理论上,以德立法的文化熏陶出兼顾情理,以矜恤弱势群体、依法断罪、宽严相济为代表的诉讼原则;在制度上,典范性的规定贯穿于诉讼程序的起诉、举证以及审理阶段,发展出了颇为完备的诉讼制度。当前,法典编纂已成为重要的时代命题,推动刑事诉讼法的法典化,一方面应吸收借鉴中国古代法制中优秀的法律传统与诉讼规律,另一方面需兼容解决现实问题以保证立法的前瞻性。

历史学科核心素养综合培养的学理逻辑及实施

如何综合培养学生的历史学科核心素养是目前中学历史教学需要解决的问题。历史学科核心素养的综合培养先要厘清五个历史学科核心素养的逻辑关系,即以家国情怀素养为最高层次的素养培养目标,以历史解释素养为核心,以唯物史观、时空观念和史料实证素养为基础形成逻辑关系结构;在进行教学设计时要按照核心素养的逻辑关系规划核心素养综合培养的路径;在教学过程中要按照核心素养综合培养路径组织学生开展探究活动。

罗马法复兴与近代欧洲法治文明

罗马法复兴运动是欧洲法律史上的重大历史事件,它反映了欧洲法治文明近代化的过程。这一运动起于中世纪意大利的各自治城市,前后有帕维亚、拉文纳、博洛尼亚等地的法学家的持续推动和助力。而罗马法研究之所以能在欧洲蔚然成风,是因为罗马法是当时的政教斗争中的有力武器,亦是文艺复兴之人文主义传播的重要手段之一。作为欧洲共同法的罗马法,一举奠定了中世纪欧洲多元一体的科学法律秩序,其后期兴起的法律民族主义思想也促进了欧洲民族法的编撰和研究,此外,罗马法中蕴含的自然法观、权利观、正义观、理性观等经进一步发展,成为了近代欧洲法治的核心内容。

硫酸盐干湿循环作用下煤矸石喷射混凝土劣化机理

为促进高硫酸盐环境下煤矿地区煤矸石大规模利用,本文制备了不同煤矸石取代率的喷射混凝土,研究干湿循环作用下煤矸石对喷射混凝土抗硫酸盐侵蚀的影响规律,从表观形貌、质量损失率、相对动弹性模量、相对抗压强度、硫酸根离子分布演化和侵蚀前后微观形貌变化进行了研究,得到了煤矸石对喷射混凝土抗硫酸盐侵蚀的影响机理。结果表明,在硫酸盐干湿循环作用下,煤矸石喷射混凝土(CGS)的劣化过程分为强化阶段、初始损伤和宏观破坏三个阶段。CGS劣化程度受干湿循环次数和煤矸石取代率协同影响,25%(质量分数)取代率下CGS抗硫酸盐性能提升,当取代率超过25%后,CGS抗硫酸盐侵蚀能力随着取代率的增加而降低。研究成果可为CGS结构在矿下应用提供重要的理论支撑。