问题-研究型教学模式在综合化学实验课程中的探索与实践

在综合化学实验课程中实施问题-研究型教学模式,其特点是教师组织和引导学生积极思考,勤于发现,对实验准备、实验步骤、实验现象和论文撰写中出现的各种疑难问题进行主动研究,从而培养学生综合分析与解决问题的能力。

浙江省与“一带一路”沿线国家贸易现状及发展思路研究

"一带一路"是中国特色社会主义新时代进一步深化开放的重大战略部署。浙江省现阶段处于工业化中后期,而"一带一路"沿线国家处于不同的工业化阶段,形成了不同的优势产业类型,浙江与"一带一路"沿线国家贸易潜力巨大。本文选取越南、印度尼西亚、泰国、沙特阿拉伯、伊朗、南非6个国家作为分析样本,采集杭州海关与上述国家进出口数据,进行产业内贸易指数计算,并对机电、纺织、化工三大重点行业国际贸易情况进行分析,最后对浙江与"一带一路"沿线国家外贸发展提出建议。总体发展思路是,针对"一带一路"沿线国家不同的产业梯度及其与浙江省产业不同的竞争状态,对于产业内贸易指数高的行业,应着重产品差别化,对产业内贸易指数较低、互补性强的行业,则应着眼于利用"一带一路"带来的战略机遇,大力拓展新兴国家市场。

Entanglement Evolution of Two-Coupled Spins in a Time-Dependent Rotating Magnetic Field

We study the dynamics evolution of a two-qubit Heisenberg XXX spin chain under a time-dependent rotating magnetic field. Based on the algebraic structure of the non-autonomous system, the exact solution of the Schrodinger equation is obtained by using the method of algebraic dynamics. Based on the time-dependent analytical solution, we further study the entanglement evolution between the two coupled spins for different initial states, and find that the entanglement is determined by the coefficients of the initial state and the coupling constant J of the system.

Synthesis and Anti-tumor Activity Study of Shogaol Analogues

As one of the largest global public health problems, cancer greatly endangers human health. Researchers have been committed to discovering anticancer drugs with high efficiency and low toxicity. Shogaol, a kind of ingredient from ginger with high anti-tumor activity, has attracted our attention. This study was an investigation on the composition and structure-activity relationship of different analogues of shogaol, with the purpose to screen for shogaol compounds which had higher anti-tumor activity and could be easily synthesized. We chose zingerone as the starting material to synthesize shogaol through four-step reactions without protective group, as a result, 31 analogues were synthesized for anti-tumor activity detect. The biological test results showed that： the missing of the unsaturated ketone and the phenolic hydroxyl group reduced the anti-tumor activity of shogaol; the site of phenolic hydroxyl had no significant influence on the anti-tumor activity, the indicating that the larger the steric hindrance of substituent, the lower the activity, but the higher the activity of cyclobutyl substituted derivatives.

蔡元培与威廉·洪堡教育思想之比较研究

对蔡元培和洪堡两位教育家的教育思想和实践做了一个粗略的比较，比较的重点是他们的教育独立观，他们对完全人格教育的看法以及他们的大学改革实践。

大学英语教师专业发展研究的趋势、特点、问题与对策——对我国1999—2009期刊文献的分析

本文对近十年大学英语教师发展研究的文献进行了梳理和分析。根据研究特点,将其分为两个阶段:起步阶段(1999—2004年)与发展阶段(2005—2009年)。总体发展趋势可概括为论文数量增加迅速,但非实证研究仍占主导地位。该领域的研究存在四个主要问题:(1)实证研究严重不足;(2)脱离课堂教学;(3)与一线教师需求脱节;(4)教师与研究者的关系不平等。针对上述问题,笔者提倡通过聚焦课堂关键问题研究,建设教师-研究者共同发展的合作团队。

A decision tree based decomposition method for oil refinery scheduling

Refinery scheduling attracts increasing concerns in both academic and industrial communities in recent years.However, due to the complexity of refinery processes, little has been reported for success use in real world refineries. In academic studies, refinery scheduling is usually treated as an integrated, large-scale optimization problem,though such complex optimization problems are extremely difficult to solve. In this paper, we proposed a way to exploit the prior knowledge existing in refineries, and developed a decision making system to guide the scheduling process. For a real world fuel oil oriented refinery, ten adjusting process scales are predetermined. A C4.5 decision tree works based on the finished oil demand plan to classify the corresponding category(i.e. adjusting scale). Then,a specific sub-scheduling problem with respect to the determined adjusting scale is solved. The proposed strategy is demonstrated with a scheduling case originated from a real world refinery.

Hamiltonian System and Infinite Conservation Laws Associated with a New Discrete Spectral Problem

Starting from a new discrete spectral problem, the corresponding hierarchy of nonlinear lattice equations is proposed. It is shown that the lattice soliton hierarchy possesses the bi-Hamiltonian structures and infinitely many common commuting conserved functions. Further, infinite conservation laws of the hierarchy are presented.

Research Progress in National Land Use Planning and Implementation Guarantee System

Land use plan serves as a leading role in land resource management, necessitating a powerful implementation guarantee system. The research concluded researches on guarantee system for land use plan from law, administration, econo- my, society and technology. Finally, existing problems and suggestions were pro- posed.

Six Sigma： The Panacea to Sustainability

Whilst there are a number of qualified methodologies, the researchers have opted to utilise the tools available through Six Sigma to prove that Six Sigma can be used to save resources and improve quality and process. Five industry sectors were identified as the ones to be surveyed using quantitative and qualitative methods and finally piloting the results on five different SMEs. Since this is a relative new methodology to the Cypriot entrepreneur and regrettably at the time of carrying out the study an international financial crisis caused a lot of financial problems to many respondents and as such could not see the immediate effects or benefits of Six Sigma and were reluctant to co-operate or participate. The Six Sigma methodology can be customized to industrial sectors and a tailored version of the methodology can be developed for a particular process or problem. The paper illustrates the problem areas identified from both the qualitative and quantitative research per industry. This is the first study carried out on Six Sigma in a small economy like Cyprus and tested on five industry sectors using both qualitative and quantitative methods

Commercial Risks Arising from Chartering Vessels

This paper constitutes a review of the most important aspects of commercial risks arising from charterparties, operations and claims issues. That means the risks allocated between the shipowner and the charterer throughout the chartering process （pre-fixture, fixture, execution of charter, post-fixture, claims handling）, from a financial, operational and legal perspective. The interpretation of the above mentioned matters is considered of critical importance in chartering practice. The analysis is seen from a commercial stand point. Therefore, it is mostly addressed to the shipping practitioners, maritime economists, academics, students and researchers who seek to form a comprehensive view on the subject. It may also form a basis for further study on chartering aspects （legal, economic, managerial and practical）.

Boundary Value Problems for First Order Stochastic Differential Equations

In this paper,we present a new technique to study nonlinear stochastic differential equations with periodic boundary value condition(in the sense of expec- tation).Our main idea is to decompose the stochastic process into a deterministic term and a new stochastic term with zero mean value.Then by using the contraction mapping principle and Leray-Schauder fixed point theorem,we obtain the existence theorem.Finally,we explain our main results by an elementary example.

Women's football:Player characteristics and demands of the game

The number of scientific investigations on women＇s football specific to the topics of player characteristics and demands of the game has considerably increased in recent years due to the increased popularity of the women＇s game worldwide, although they are not yet as numerous as in the case of men＇s football. To date, only two scientific publications have attempted to review the main findings of studies published in this area. However, one of them was published about 20 years ago, when women＇s football was still in its infancy and there were only a few studies to report on. The other review was more recent. Nonetheless, its main focus was on the game and training demands of senior elite female players. Thus, information on female footballers of lower competitive levels and younger age groups was not included. Consequently, an updated review is needed in this area. The present article therefore aims to provide an overview of a series of studies that have been published so far on the specific characteristics of female football players and the demands of match-play. Mean values reported in the literature for age （12-27 years）, body height （155-174 cm）, body mass （48-72 kg）, percent body fat （13%-29%）, maximal oxygen uptake （45.1-55.5 mL/kg/min）, Yo-Yo Intermittent Recovery Test Level l （780-1379 m）, maximum heart rate （189-202 bpm）, 30 m sprint times （4.34-4.96 s）, and counter- movement jump or vertical jump （28-50 cm） vary mostly according to the players＇ competitive level and positional role. There are also some special considerations that coaches and other practitioners should he aware of when working with female athletes such as the menstrual cycle, potential pregnancy and lactation, common injury risks （particularly knee and head injuries） and health concerns （e.g., female athlete triad, iron deficiency, and anemia） that may affect players＇ football performance, health or return to play. Reported mean values for total distance covered （4-13 km）, distance covered at high-speed （0.2-1.7 km）, average/peak heart rate （74%-87%/94%-99% HRmax）, average/peak oxygen uptake （52%-77%/96%-98% VO2max）, and blood lactate （2.2-7.3 mmol/L） during women＇s football match-play vary according to the players＇ competitive level and positional role. Methodological differences may account for the discrepancy of the reported values as well. Finally, this review also aims to identify literature gaps that require further scientific research in women＇s football and to derive a few practical recom-mendations. The information presented in this report provides an objective point of reference about player characteristics and game demands at various levels of women＇s football, which can help coaches and sport scientists to design more effective training programs and science-based strategies for the further improvement of players＇ football performance, health, game standards, and positive image of this sport.

Indoor Environmental Requirements in Green Building in Jordan

The aim of this study is to provide stimulating and comfortable environments for the occupants and minimize the risk of green building related health problems. Researcher has developed a number of assumptions that helps to resolve the research problems, which includes the application of the indoor environmental quality and will highlight the required design standards of it to provide a healthy environment to the houses and chosen AREE （Aqaba residence energy efficiency） as a case study. The theoretical part goes through a brief study to definition of the required design standards which includes eight kinds of issues： indoor environmental quality intents, control of environmental tobacco smoke, control of chemicals contaminants, design well ventilated buildings, provide daylight/view, energy efficient lighting, thermal comfort, consider acoustics and its uses in all the elements of internal spaces. Than we going through the uses of these requirements by using descriptive analytical approach, we chose one case study （AREE）. To analyze the uses of their requirements of the indoor environmental quality and we also collect the information about this house from the owner of the AREE, then draw conclusions and list of references.

Optimal Rapid Restart of Heuristic Methods of NP Hard Problems

Many heuristic search methods exhibit a remarkable variability in the time required to solve some particular problem instances. Their cost distributions are often heavy-tailed. It has been demonstrated that, in most cases, rapid restart (RR) method can prominently suppress the heavy-tailed nature of the instances and improve computation efficiency. However, it is usually time-consuming to check whether an algorithm on a specific instance is heavy-tailed or not. Moreover, if the heavy-tailed distribution is confirmed and the RR method is relevant, an optimal RR threshold should be chosen to facilitate the RR mechanism. In this paper, an approximate approach is proposed to quickly check whether an algorithm on a specific instance is heavy-tailed or not. The method is realized by means of calculating the maximal Lyapunov exponent of its generic running trace. Then a statistical formula to estimate the optimal RR threshold is educed. The method is based on common nonparametric estimation, e.g., Kernel estimation. Two heuristic methods are selected to verify our method. The experimental results are consistent with the theoretical consideration perfectly.

Study on Factors of College Student＇s Network service time Based on Bayesian Networks

Due to the uncertainty of the factors that influence the network service time and other characters of college student, Bayesian Network is used to model this kind of system. Different algorithms are used for learning Bayesian Networks in order to compare several models. It is suggested that researchers can use Bayesian Networks to explore the potential relationship between variables of complex social problems. The result indicates that learning target and family closeness degree are the key variables which influenced college student＇ s network service time. Origin of student and family economy didn＇ t influence college student＇ s network service time directly. Schools and community should strengthen the education of college students life planning and communication with parents.

Translation Quality Assessment： Bridge the Gap between Theory and Practice

Translation Quality Assessment （TQA） is a central concern for both academic research and translation practice. Yet consensus on the issue has almost never been reached among theorists and practitioners. In this paper, a detailed comparison between academic and professional assessment has been made mainly in terms of text type, assessment criteria and models. It is believed that a ＂one size fits all＂ model across academy and industry is neither possible nor necessary. However, the gaps in between could be narrowed down by increasing communication and cooperation between theorists and practitioners, who are advised to turn their focus to translator＇s competence and evaluation process.

基于感知模式纹理的人脸识别

稀疏表示分类法和局部二值模式是目前广泛运用的人脸表示方法.虽然稀疏表示分类法通过重构算法能很好的稀疏表示人脸,但在人脸的局部特征表示上不够理想.局部二值模式是基于局部纹理特征表示人脸,其提取的局部纹理简单、不连续、不光滑,造成纹理损失严重.提出局部纹理特征的感知模式纹理的概念,克服了稀疏表示分类法在局部特征表现不佳的缺点,同时又比局部二值模式纹理光滑、鲁棒.利用感知模式纹理特征在Yale和ORL数据库取得了较好的识别效果.

批评家学术档案

洪子诚,1939年4月生,广东揭阳人。1961年毕业于北京大学中文系并留校任教,从事中国当代文学、中国新诗的教学、研究工作,1993年起任中文系教授。主要著述有《当代中国文学概观》(合著)、《当代中国文学的艺术问题》《作家姿态与自我意识》《中国当代新诗史》(合著)、、《中国当代文学概说》《1956:百花时代》《中国当代文学史》《问题与方法-中国当代文学史研究讲稿》《文学与历史叙述》《材料与注释》《我的阅读史》《读作品记》等。