多元函数最佳逼近的精确阶

:关于找使得　Ω m( f ,1σ)～ Aσ( f )　 (σ→∞ ) .成立的充分条件和必要条件的 Timan问题被解决 ,必要条件是　Ω m( f ,1σ)～Ω m 1( f ,1σ) ,　 (σ→∞ ) .充分条件是　 ωmjej ( f ,1σj)～ (ωmj 1ej ( f,1σj)　 ( σj→∞ ,j=1,2 ,… ,n) .     

人类活动与地理环境相互作用机制新探：兼论教育与地理环境？…

人类活动与地理环境的关系（简称人－地关系）问题,随着世界生态危机的日益严重,已成为当今的热点问题,本试图在分析已有的人－地关系理论存在问题的基础上,对人类活动与地理环境相互作用的机制问题进行较深入的分析,认为,人－地关系本质上是一种相互制约、相互作用的双向同构关系,人类活动与地理环境相互作用具有直接性与间接性的机制特征,人类活动可划分为物质生产活动、精神生产活动和人口生产活动,这三类活动与地理环     

Detection of tubercular antibody and antigen in sera of bone and joint tuberculosis

Trichloroacetic acid (TCA) solubilized and DEAE fractionatedMycobacterium tuberculosis H₃₇Ra excretory-secretory (ES) antigen viz., Mtb EST DE1 and affinity purified goat antibodies to the TCA solubilized ES antigen (Mtb EST) were explored in detecting tubercular antibody and antigen respectively in sera of bone and joint tuberculosis by indirect and sandwich ELISA. Out of total 36 bone & joint tuberculosis cases, tubercular antibody was detected by indirect ELISA in 30 patients (sensitivity 83%), while circulating tubercular antigen was detected by sandwich ELISA in 27 patients (sensitivity 75%). Out of 34 non tubercular disease control cases, 10 patients showed positive reaction for antibody while only 4 patients showed positive reaction for antigen. In another group of 34 healthy subjects who were screened, 4 individuals showed positive reaction for tubercular antibody and 2 cases for antigen. This study shows that antigen detection assay using affinity purified anti Mtb EST antigen antibody is superior with overall specificity of 91% as compared to antibody detection assay with 75% specificity in bone & joint tuberculosis.     

Identification of twist-angle-dependent excitons in WS2/WSe2 heterobilayersOA

Stacking atomically thin films enables artificial construction of van der Waals heterostructures with exotic functionalities such as superconductivity, the quantum Hall effect, and engineered light-matter interactions.In particular, heterobilayers composed of monolayer transition metal dichalcogenides have attracted significant interest due to their controllable interlayer coupling and trapped valley excitons in moiré superlattices. However, the identification of twist-angle-modulated optical tr...     

从间接言语行为看英语婉语的交际功能

委婉语是间接言语行为的一种表现形式。委婉语的使用能够回避精神上的刺激和情感上的冲突，达到理想的交际效果。本文从间接言语行为的角度，分析了英语委婉语的避讳、礼貌和掩饰三种交际功能。     

论数学哲学中的直觉主义思想

数学哲学中的直觉主义学派高度重视直觉和个人的创造性思维在科学实践中的作用，这具有积极的意义，它对排中律和间接证明方法有效性的质疑，揭示了经典逻辑只具有相对的真理性；它所倡导的构造性和能行性的研究方法，促进了人工智能和计算机科学的发展。但是，对直觉功能的过分夸大则并不足取。     

成对间接电氧化合成有机物研究

综述了间接电氧化和成对电合成有机地结合起来建立的一种新的电合成方式,即成对间接电氧化合成有机物,从目前成对电合成种类上又给予丰富.在论述了该合成成功的典型例子后,作者提出了研究成对间接电氧化合成有机物的意义.     

The effects of virtual racial embodiment in a gaming app on reducing prejudice

This research experimentally examined the effectiveness of the use of virtual racial embodiment in a digital gaming application for reducing bias against a non-dominant group. The findings of this study advance theory and have practical implications for the design of immersive diversity initiatives. We tested avatar creation and the gaming app as a new modality for stimulating perspective-taking. In addition, we explored how sex and race intersect in virtual embodiment and stereotyping. Results showed that creating and embodying a Black avatar produced more favorable beliefs about African American men, but not African American women, and greater support for “pro-minority” policies in comparison to creating and playing a White avatar. Avatar liking was a significant moderator, but self-presence had no effect.     

The importance of indirect teaching behaviour and its educational effects in physical education

Background: Physical education teacher behaviour has been a subject of study in physical education including physical education teacher education for 30 years. However, the research on teacher behaviour has tended to focus on direct teaching behaviour (DTB) to demonstrate the benefits of effective teaching, centred on a technical understanding of the process of teacher behaviour. A holistic approach for teaching behaviour is needed in order to give students educational experiences.

Aims: Drawing on the studies of implicit ways of teaching, the aim of this paper is to provide a new approach of researching teacher behaviour in order to understand the social and moral assumptions and to promote students' motivation to engage in physical activities that are embedded in the act of teaching in physical education through the identification of indirect teaching behaviour (ITB).

Method: An ethnographically informed case study based on participant observation (eight months) was employed. The researcher observed students in two 8th-grade (13 years old) co-ed physical education classes in South Korea. Participant observation was supported by participant observer field notes, audio/video recordings of classes, questionnaires, and interviews.

Findings: Through inductive analysis of the data, the multiple ITBs were identified including tone of voice and intonation, humour, facial expressions and gestures, dress code and setting an example, touch, encouragement, and care. ITB had a powerful influence on students' social and moral development in terms of reflecting on themselves by the teacher's positive modelling, cooperating with other friends and learning the intrinsic value of physical activities and sports. ITB was also found to impact the student's perceptions of physical education and their physical education teachers, which seems to encourage them to learn more about the lesson.

Conclusions: An understanding of ITB will help broaden the perspectives on teaching methods used and studies conducted in physical education beyond the dominant approach of DTBs. Teachers need to reflect upon their behaviour in the physical education class, even if their teaching behaviours are regarded as trivial. Furthermore, the understanding of ITB can also play a pivotal role in encouraging pupils to enjoy the intrinsic value of physical education centred on moral values, and fostering a passion for physical activity that extends into participation for life. In this sense, this insight suggests that researchers re-examine the power of ITB in relation to teachers' professional competence. Teacher educators need to intentionally cultivate the character of teacher candidates in their professional preparation phase in addition to ITB-related studies in physical education.     

反向间接血凝法检测畜禽血清乙型肝炎表面抗原及其探讨

应用反向间接血凝检测畜禽血清中人类乙型肝炎表面抗原,结果各种畜禽血清均发现有阳性,且比率甚高(18.3-30.9％)。笔者试将受检血清分别经过HRBc吸收,抗HBs中和等方法处理,发现畜禽血清存在HRBc天然凝集素和与HBsAg不同的类似抗原,这些非特异性因素使血凝试验出现高比率的阳性,因此,在动物血清做反向间接血凝前,应设法排除非特异性因素、结果较为可靠。