论厄普代克《罗杰教授的版本》的叙述策略

《罗杰教授的版本》是美国作家约翰·厄普代克的"红字"三部曲中的一部,在作品的创作中,作家突破以往的创作风格,在叙事实验方面作了尝试。作者运用叙事视角的突破、人物品行中的缺陷的暴露、模糊叙述者与隐含作者伦理取位等叙事技巧,为读者营造出叙述的不可靠性和含混性,从而赋予文本多义性和开放性。     

宋代目录书所收禅宗典籍

宋代刊刻了多种佛教藏经,但收录禅宗典籍很少,禅门著述中也缺乏相对全面的描述,这个缺憾在宋代目录书中有所弥补.本文通过对<崇文总目>、<遂初堂书目>、<郡斋读书志>、<直斋书录解题>四种目录书所收禅宗典籍的考察和分析,对各书目所收禅籍种类、数量及各书的特点做了一个扼要的说明.     

Relationships between serum lipid, lipoprotein, triglyceride-rich lipoprotein, and high-density lipoprotein particle concentrations in post-renal transplant patients

Objective:Disturbances in lipid and lipoprotein profiles in patients after kidney transplantation (Tx) are still not understood. Methods:Serum levels of lipids,lipoprotein,triglyceride-rich lipoproteins (TRLs),and high-density lipoprotein (HDL) particles were determined,lipid and lipoprotein ratios were calculated,and their relationships in Tx patients with hypertriglyceridemia (HTG) and lower apolipoprotein AI (apoAI) concentration were examined. Serum lipid and lipoprotein levels were measured in 109 Tx p...     

Command filtered adaptive neural network synchronization control of fractional-order chaotic systems subject to unknown dead zones

Command filters are essential for alleviating the inherent computational complexity (ICC) of the standard backstepping control method. This paper addresses the synchronization control scheme for an uncertain fractional-order chaotic system (FOCS) subject to unknown dead zone input (DZI) based on a fractional-order command filter (FCF). A virtual control function (VCF) and its fractional-order derivative are approximated by the output of the FCF. In order to handle filtering errors and obtain good control performance, an error compensation mechanism (ECM) is developed. A radial basis function neural network (RBFNN) is introduced to relax the requirement of the uncertain function must be linear in the standard backstepping control method. The construction of a VCF in each step satisfies the Lyapunov function to ensure the stability of the corresponding subsystem. By using the bounded information to cope with the unknown DZI, the stability of the synchronization error system is guaranteed. Finally, simulation results verify the effectiveness of our methods.     

A preliminary evaluation of VEGF-A,VEGFR1 and VEGFR2 in patients with well-controlled type 2 diabetes mellitus

Objective

Decompensated chronic hyperglycemia often leads to late microvascular complications such as retinopathy, diabetic foot syndrome, and diabetic kidney disease. The aim of this study was to determine the concentration of vascular endothelial growth factor A (VEGF-A) and its receptors in patients with well-controlled diabetes.

Methods

The study was conducted on 31 patients with well-controlled type 2 diabetes without micro-or macroangiopathy. Thirty healthy volunteers were enrolled in a control group. Serum concentrations of VEGF-A, VEGF receptors 1 and 2 (VEGFR1 and VEGFR2), fasting glucose, and lipid profiles were measured, and the plasma concentration of glycated hemoglobin (HbA1c) was determined.

Results

No significant differences were observed between the concentration of VEGF-A, VEGFR1 or VEGFR2 in the subject group and that in the control group. Positive correlations were noted between the levels of VEGF-A, VEGFR2, and triglyceride, and there was a negative correlation between the levels of VEGFR2 and high-density lipoprotein (HDL)-cholesterol in the study group.

Conclusions

The concentrations of VEGF-A and its receptors 1 and 2 in patients with well-controlled diabetes are comparable to those of healthy individuals, which may indicate that appropriate control of glucose levels delays the occurrence of vascular complications. A negative correlation between VEGFR2 and HDL-cholesterol levels, and positive correlations between VEGF-A, VEGFR2, and triglyceride levels, suggest that lipid abnormalities occurring in diabetes may be involved in the modulation of angiogenesis.     

The influence of unsupervised time on elementary school children at high risk for inattention and problem behaviors

In the last few decades, changing socioeconomic and family structures have increasingly left children alone without adult supervision. Carefully prepared and limited periods of unsupervised time are not harmful for children. However, long unsupervised periods have harmful effects, particularly for those children at high risk for inattention and problem behaviors. In this study, we examined the influence of unsupervised time on behavior problems by studying a sample of elementary school children at high risk for inattention and problem behaviors. The study analyzed data from the Children's Mental Health Promotion Project, which was conducted in collaboration with education, government, and mental health professionals. The child behavior checklist (CBCL) was administered to assess problem behaviors among first- and fourth-grade children. Multivariate logistic regression analysis was used to evaluate the influence of unsupervised time on children's behavior. A total of 3,270 elementary school children (1,340 first-graders and 1,930 fourth-graders) were available for this study; 1,876 of the 3,270 children (57.4%) reportedly spent a significant amount of time unsupervised during the day. Unsupervised time that exceeded more than 2 h per day increased the risk of delinquency, aggressive behaviors, and somatic complaints, as well as externalizing and internalizing problems. Carefully planned afterschool programming and care should be provided to children at high risk for inattention and problem behaviors. Also, a more comprehensive approach is needed to identify the possible mechanisms by which unsupervised time aggravates behavior problems in children predisposed for these behaviors.     

Early Childhood Teacher Learning Through a Professional Development School Program in Hong Kong

Emphasis on continuing professional development is seen as an important aspect of educational reform at all levels of education. In recent years, a number of colleges and universities have established partnerships for the professional development of teachers at the elementary and secondary levels. However, there have been few partnerships within the Professional Development School Program (PDS) established in early childhood settings. Thus, this paper explores the growth and development of two kindergarten teachers after their school participated in a PDS in Hong Kong.     

理想的网络教室终端机配置

现代教学对网络教室的依赖性越来越大,保证网络教学软件环境的高效、安全、清洁运行显得尤为重要.就这一问题进行较为详细的分析和论述,并提出较为合理的解决方法.