The natural fractures in mud or shale directly affect the quality and efficiency of shale gas reservoirs, and fracture identification and prediction play an important role in drilling shale gas wells and making plans for reservoir stimulation. We adopted ant tracking technology for 3D poststack reflective seismic waves to identify the size and distribution of high-angle structural fractures in the Zhangjiatan shale of the Yanchang Formation in the Ordos Basin, which is a typical continental shale. The parameters for ant tracking (...) fractures are extracted from the investigation on outcrop, cores, and image logs. The prestack seismic diffractive wave imaging technique for the super-resolution identification of mid- and small-scale breakpoints can be used as the constraint conditions for ant tracking. The identified result of high-angle fractures was validated by the image logging and drilling gas logging results. The geologic and logging data indicate that the Zhangjiatan shale is mainly characterized by high-angle fractures and a smaller number of low-angle fractures. The fractures mainly trend in the near east–west direction, followed by the near north–south direction, and a small amount of fractures in the north–northeast and northwest–west directions. The average density of structural fractures is relatively low, but the cemented rate is only 15.7%, and most structural fractures maintain an open state. The identified and predicted structural fractures are mainly distributed in the southeast of well LP180 and south of well LP179. The higher gas shows from actual well drilling in shale directly correspond to the density and intensity of high-angle fractures rather than the matrix gas abundance in shale, which indicates that the sweet spot of gas production in shale is clearly controlled by structural fractures. (shrink)
Shale oil and gas have been discovered in the lacustrine Zhangjiatan Shale in the southern Ordos Basin, China. To study the distribution of extractable organic matter in the Zhangjiatan Shale, geochemical characterization of core samples of different lithologies, scanning electron microscope observations, low-pressure [Formula: see text] and [Formula: see text] adsorption, and helium pycnometry were conducted. The content and saturation of the EOM in the pores were quantitatively characterized. The results show that the distribution of the EOM in the shale (...) interval is heterogeneous. In general, the shale layers have a higher EOM content and saturation than siltstone layers. The total organic content and the original storage capacity control the EOM content in the shale layers. For the siltstone layers, the EOM content is mainly determined by the original storage capacity. On average, 75% of the EOM occurs in the mesopores, followed by 14% in the macropores, and 11% in the micropores. The EOM saturation in the pores decreases with the increase in pore diameter. The distribution of EOM in the shale pores is closely related to the pore type. Micropores and mesopores developed in the kerogens and pyrobitumens and the clay-mineral pores coated with organic matter are most favorable for EOM retention and charging. (shrink)
Based on in-depth interview data and popular culture texts, the current study has explored the politics of reproduction revolving around women’s age in contemporary China. Conceptualizing reproduction as a site of contestation and politics between different, and often contradictory, sets of discourses and power structures, I pursue a feminist and social constructivist analysis of the politics of reproduction in the lives of a group of urban professional women who are yet to enter motherhood at their late 20s and 30s. I (...) engage with Inhorn’s concept of ‘disrupted reproduction’ to highlight the politically, morally and emotionally charged contestations in the ‘problematized’ reproductive lives of these women. I unveil how Chinese professional women beyond their ‘reproductive prime’ are discursively constructed as ‘disrupters’, who fail their femininity test tied to a motherhood identity within the family context, challenge the ‘natural’ biological law regulating their reproductive bodies, and face a doomed reproductive future fraught with medical, physical and emotional traumas which ART cannot alleviate. Such a discourse renders invisible the structural causes of problems and challenges professional women face in negotiating parenthood, social norms and selfhood, which systematically put them under pervasive social surveillance and discipline. (shrink)
Here, the author, develops a type theory, studies its properties, and explains its uses in applications to computer science. In particular, type theory is shown to offer a powerful and uniform language for programming, program specification and development, and logical reasoning.
In _Shifts of Power: Modern Chinese Thought and Society_, Luo Zhitian explores the causes and consequences of various shifts of power during the transition from imperial to Republican China.
Marx's social development theory is the major content of Marx’s social and historical philosophy and is an important scientific achievement in his arduous exploration. Today, when social development encounters contradictions and difficulties, we may review Marx's social development theory with an expectation to seek for enlightenment to resolve contradictions and difficulties in contemporary social development.
Is it possible, given culturally incongruent perspectives, to validate any common standards of behavior? Is it possible to implement human rights in societies without incorporating the idea into their fabric of culture? Is it possible for cultural communities to survive in the contemporary world without rights protection? This book addresses questions like these in the light of an inventive and original understanding of culture.
Based on its productionguideline, organic agriculture has set foritself the goals of minimizing all forms ofpollution and maintaining sustainability of thefarming system. By striving for these goals,organic farming meets the demands of anincreasing number of consumers who are criticalof conventional production methods. This papergives an overview of the present state of theart in the different issues. Possibilities ofand limitations in performing the self-aimedgoals under the basic standards of organicagriculture are discussed. Concerningenvironmental protection, in general, the riskof adverse environmental effects is (...) lower withorganic than with conventional farming methods,though not necessarily so; with reference tosoil fertility and nutrient management, organicfarming is suited to improve soil fertility andnutrient management markedly on the farm level;regarding biodiversity, comparison studies showthat organic farming has more positive effectson biodiversity conservation; in relation toproduct quality, under the basic standards oforganic farming, there is no sufficientevidence for a system-related effect on productquality due to the production method. (shrink)
A prefrontal control system that is less mature than the limbic reward system in adolescence is thought to impede self-regulatory abilities, which could contribute to poor dietary choices and obesity. We, therefore, aimed to examine whether structural morphology of the prefrontal cortex and the amygdala are associated with dietary decisions and obesity in children and adolescents. Seventy-one individuals between the ages of 8–22 years participated in this study; each participant completed a computer-based food choice task and a T1- and T2-weighted (...) structural brain scans. Two indices of obesity were assessed, including age- and sex-specific body mass index and waist-to-height ratio. The behavioral task included rating 60 food stimuli for tastiness, healthiness, and liking. Based on each participant’s self-ratings, 100 binary food choices were then made utilizing a computer mouse. Dietary “self-control” was calculated as the proportion of trials where the individual chose the healthier food item over the total number of trials. Cortical thickness and amygdala subnuclei volumes were quantified using FreeSurfer 6.0 and CIT168 atlas, respectively. We found that WHtR was negatively associated with the thickness of bilateral superior frontal, left superior temporal, right insula, and right inferior temporal regions. We also found WHtR to be positively associated with the volume of the central nucleus region of the amygdala, after adjusting for the hemisphere, age, sex, and intracranial volumes. A similar data pattern was observed when BMIz was used. Moreover, we found that across all participants, thinner right superior frontal cortex and larger left CEN volumes predicted lower dietary self-control. These results suggest that differential development of the PFC and amygdala relate to obesity and dietary self-control. Further longitudinal studies are merited to determine causal relationships among altered PFC to amygdala neural circuitry, dietary self-control, and obesity. (shrink)
Computer vision is widely used in manufacturing, sports, medical diagnosis, and other fields. In this article, a multifeature fusion error action expression method based on silhouette and optical flow information is proposed to overcome the shortcomings in the effectiveness of a single error action expression method based on the fusion of features for human body error action recognition. We analyse and discuss the human error action recognition method based on the idea of template matching to analyse the key issues that (...) affect the overall expression of the error action sequences, and then, we propose a motion energy model based on the direct motion energy decomposition of the video clips of human error actions in the 3 Deron action sequence space through the filter group. The method can avoid preprocessing operations such as target localization and segmentation; then, we use MET features and combine with SVM to test the human body error database and compare the experimental results obtained by using different feature reduction and classification methods, and the results show that the method has the obvious comparative advantage in the recognition rate and is suitable for other dynamic scenes. (shrink)
Recent enactive approach to social cognition stresses the indispensability of social affordance with regard to social understanding and contends that it is affordance that primarily solicits one’s reaction to the other, such that one becomes affected by the other and attends to the other’s situated appearance in the first place. What remains to be explored, however, is the sense in which social affordance is delineated by an affective sphere and the extent to which the affective sphere serves as a meaning (...) constraint for social sense-making. In this paper, we analyze Husserl’s genetic theory of affection, so as to better understand the nature of the social affective sphere. And we argue that social understanding takes places at different levels and it is at the passive and pre-reflective level that the social surroundings are pre-delineated by a sort of affective ambience where the empathizer and the empathizee come into contact. Once this is appreciated, we can better articulate the affective structure of social affordance and its meaning constituents. And we show that, at the passive level, social coupling is in nature an affective intertwinement between oneself and the other and it consists of a particular kind of corporeal intentionality with which one adverts to the other’s presence and responds to the other’s appeal. (shrink)
Based on conversations between 10 Chinese children with Autism Spectrum Disorders and five therapists in the context of Naturalistic Intervention, this study investigated the therapists’ agreement expressions in this typical setting. The study found that the therapists mainly used four agreement strategies: acknowledgment, positive evaluation, repetition and blending. These four strategies could be used individually or in combination. The first three strategies and their combinations were used frequently during the therapeutic conversation. With the major occurrences in the post-expansion position, the (...) agreement expressions in the therapeutic conversation mainly performed three functions, namely, creating a supportive therapeutic relationship, serving as positive reinforcers and implementing interventions pertinent to communication skills. This study proposed that the therapists’ preferred use of agreement expressions in the intervention process could be explained by the features of Naturalistic Intervention. (shrink)
Bioethical debates on the use of human embryos and oocytes for stem cell research have often been criticized for the lack of empirical insights into the perceptions and experiences of the women and couples who are asked to donate these tissues in the IVF clinic. Empirical studies that have investigated the attitudes of IVF patients and citizens on the donation of their embryos and oocytes have been scarce and have focused predominantly on the situation in Europe and Australia. This article (...) examines the viewpoints on the donation of embryos for stem cell research among IVF patients and students in China. Research into the perceptions of patients is based on in-depth interviews with IVF patients and IVF clinicians. Research into the attitudes of students is based on a quantitative survey study. The empirical findings in this paper indicate that perceptions of the donation of human embryos for stem cell research in China are far more diverse and complex than has commonly been suggested. Claims that ethical concerns regarding the donation and use of embryos and oocytes for stem cell research are typical for Western societies but absent in China cannot be upheld. The article shows that research into the situated perceptions and cultural specificities of human tissue donation can play a crucial role in the deconstruction of politicized bioethical argumentation and the assumptions about “others” that underlie socio-ethical debates on the moral dilemmas of technology developments in the life sciences. (shrink)
The main goal of this paper is to analyse the effect of high school scholarships tied to community service on the development of secondary school students in Northwest China. Using data from three rounds of surveys of thousands of students in 298 classes in 75 high schools in Shaanxi province, the paper documents the implementation of the Compassionate Heart Scholars Program and evaluates the effect of the programme on the educational performance, self‐esteem, self‐efficacy and social responsibility of the participants. We (...) present evidence that part of the protocol of the programme improves the academic performance and self‐esteem of those involved in the programme. The community service part of the programme is shown to raise the self‐efficacy and the sense of social responsibility of the programme participants. One striking result is that the test scores of the community service participants do not appear to be adversely affected, even though they spend considerable time doing community service. The findings of this study, therefore, suggest that adding extra‐curricular community service to school curricula may be a win–win–win strategy, for the students, for schools and for the local communities served. (shrink)
A logic-enriched type theory is a type theory extended with a primitive mechanism for forming and proving propositions. We construct two LTTs, named and , which we claim correspond closely to the classical predicative systems of second order arithmetic and . We justify this claim by translating each second order system into the corresponding LTT, and proving that these translations are conservative. This is part of an ongoing research project to investigate how LTTs may be used to formalise different approaches (...) to the foundations of mathematics.The two LTTs we construct are subsystems of the logic-enriched type theory , which is intended to formalise the classical predicative foundation presented by Herman Weyl in his monograph Das Kontinuum. The system has also been claimed to correspond to Weyl’s foundation. By casting and as LTTs, we are able to compare them with . It is a consequence of the work in this paper that is strictly stronger than .The conservativity proof makes use of a novel technique for proving one LTT conservative over another, involving defining an interpretation of the stronger system out of the expressions of the weaker. This technique should be applicable in a wide variety of different cases outside the present work. (shrink)
Objectives To explore how factors relating to grades and grading affect the correctness of choices that grant-review panels make among submitted proposals. To identify interventions in panel design that may be expected to increase the correctness of choices. -/- Method Experimentation with an empirically-calibrated computer simulation model of panel review. Model parameters are set in accordance with procedures at a national science funding agency. Correctness of choices among research proposals is operationalized as agreement with the choices of an elite panel. (...) -/- Conclusions The simulation model generates several hypotheses to guide further research. Increasing the number of grades used by panel members increases the correctness of simulated choices among submitted proposals. Collective decision procedures giving panels a greater capacity for discriminating among proposals also increase correctness. Surprisingly, differences in grading standards among panel members do not appreciably decrease correctness. (shrink)
According to social learning theory, we explored the relation between ethical leadership and knowledge hiding. We developed a moderated mediation model of the psychological safety linking ethical leadership and knowledge hiding. Surveying 436 employees in 78 teams, we found that ethical leadership was negatively related to knowledge hiding, and that this relation was mediated by psychological safety. We further found that the effect of ethical leadership on knowledge hiding was contingent on a mastery climate. Finally, theoretical and practical implications were (...) discussed for leadership and knowledge management. (shrink)
This paper explores Zha Changping’s humanistic criticism of pioneering Chinese art as a new paradigm in art criticism after the postmodern disintegration of traditional art history with its linear art history writing. It introduces the “seven forming factors” at the heart of Zha’s “world relational aesthetics,” which, on one hand, gauges the pulse of the time, while on the other hand seeking to uncover the underlying relational logic informing this generation of pioneering artists’ intellectual outlook and artistic output.
Through empirical studies or laboratory tests, previous studies have shown that sport-confidence, attention, and emotion regulation are key factors in archery performance. The present study aims to further identify the effects and pathways of sport-confidence, attention, and cognitive reappraisal on real-world archery performance by constructing a hypothesized model to provide a basis for scientific training of athletes to improve sport performance. A survey design was utilized on a sample of 61 athletes from the Chinese National Archery Team to test the (...) model. The measurement and hypothesized models were tested using partial least squares structural equation modeling. The results indicate that the model fit well and explained 33.6% of the variance in archery performance. Sport-confidence and attention were important predictive indicators of archery performance, while the relationship between cognitive reappraisal and archery performance showed considerable complexity. We conclude that the development of sport-confidence and attention of archery athletes should be strengthened, but athletes who use cognitive reappraisal in archery competition should be mindful of its potential appropriation of cognitive resources and should be directed to improve sport-confidence or develop a positive orientation to arouse excitement. (shrink)
