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1.
Using geotextile bag dehydrated soil to construct dikes for land reclamation to substitute conventional straw bags is an urgent need in Tianjin New Harbor, China. This paper introduces the method to build a dike for hydraulic filling. The soil for filling the geotextile bags was tested in wave trench ; the stress developed during construction was calculated by establishing a numerical model and compared with the tensile strength of the geotextile; the stability and settlement of the dike were estimated by performing centrifuge tests. Through this study, the following information was obtained: 1 ) The cohesionless silt with plasticity index less than 10 is suitable for filling the geotextile bags. The geotextile bag dehydrated soil consolidated very quickly even under the action of wave force. 2) A numerical model was devised to find the limit injection height and to calculate the tensile stress developed in the geotextile bags when they were piled up to form the dike. The calculated stress was compared with the strength of the geotextile, showing that the design is reasonably safe. 3) Centrifuge test results show that the designed dike will be stable and the settlement of dike will be less than the design requirement. 相似文献
2.
苏华 《语数外学习(高中版)》2008,(21):48-48
From today on, we will witness a major change in the shopping experience across China. The production, sale and use of plastic shopping bags 0.025 millimeters thick or thinner will be banned, and retailers will be prohibited from providing customers with flee plastic bags, under a State Council decree released in January. 相似文献
3.
The elements of Sartre’s existentialism are shown in Shirley Jackson’s The Lottery: The world abounds with absurdities and bitterness; people can be the hell to each other; an individual has a free choice and act, but should be responsible for his or her behavior. Shirley discusses the problem of the existence of an individual in the complex web of society and environment in The Lottery, just as Sartre in his works of existentialism. 相似文献
4.
A specific application of task-based learning in teaching vocabulary to young learners and a complete task cycle using role play to present vocabulary in China’s private language school would be described in the study. The participants aged between 7 and 9 are thought to be starters according to their language competence in Common European Framework of Reference for language. The rationale for stages in the task cycle will be fully explored with reference to Piaget and Vygotsky’s theory in teaching young learners. The advantages of the adoption of TBL with young learners will be illustrated and some possible problems in implementing TBL in China, a representative country of Confucian-heritage culture would also be discussed in the paper. The study indicates that young learners in China are quite welcome this new approach in their English classes, but the targeted learners’ age and background information need to be taken into consideration when actually implement this approach. 相似文献
5.
Okopi Onjefu Fidel 《美中教育评论》2010,(2):76-82,100
The whole world is now referred to as a global village because of the technological revolution is taking place especially in the area of information and communication. In this paper, the author started the discussion with definition of communication, highlighted means of communication and purposes of communication, counselling as a form of communication, conceptual flame work for communication in ODL （open and distance education）, component of good communication, media selection and combination for effective counselling process in NOUN. The author in his recommendations, advocated that for a counsellor to be effective in discharging his responsibilities, he or she must attain a certain level of competency in communication skills, select appropriate media, and must be efficient in the use of communication devices especially computer. Also the media of counselling must be readily available to both the counsellor and counselees. 相似文献
6.
The uniforms for Beijing Olympics' workers, technical staff and volunteers have been unveiled to mark the 200-day countdown to the Games. The uniforms feature the key element of the clouds of promise and will be in three colors:red for Beijing Olympic Games Committee staff, blue 相似文献
7.
Robert Frost is one of the famous poets of the 20th century American literature who won the Pulitzer Prize for four times. The reason for his popularity is partially because he employs traditional verse form and iambic pentameter pattern in poem writing, but the most important reason for the reputation of his poems lies in the thematic concern of something universal, such as death and life, love and hate, war and peace, the good and the evil, the wisdom of human life and etc. . A brief analysis will be given in the following text about the wisdoms of human life embodied in Robert Frost’s poems from three aspects: 1. Relaxation and responsibility of man. 2. The decisions in life. 相似文献
8.
The aim of this paper is to propose a useful method for exploring regional ventilation and perfusion in the chest and also separation of pulmonary and cardiac changes.The approach is based on estimating both electrical impedance tomography(EIT) measurements and reconstructed images by means of principal component analysis(PCA).In the experiments in vivo,43 cycles of heart-beat rhythm could be detected by PCA when the volunteer held breath;9 breathing cycles and 50 heart-beat cycles could be detected by PCA ... 相似文献
9.
A novel energy-regenerative active suspension (NEAS) system was designed to solve the problem of low energy recovery efficiency caused by frequent alternation of energy-recovery mode and active-control mode in a traditional energy-regenerative active suspension (TEAS) system. The energy recovery and active control could be implemented simultaneously in the NEAS. The transforming processes and the corresponding computational formulas of power conversion in the NEAS were provided. The simulation results show that the performances of energy recovery of the NEAS are improved, and the self-sustaining of power supply for the NEAS can be realized. 相似文献
10.
The global spread of English is remarkable, for it has developed many different non-native varieties of English("world Englishes"). On account of the varieties of English, the essay reviews briefly historical causes and relevant literature for English globalization. The issues of English localization, who is qualified as English instructor, what kind of English to learn and how is English changing in China are included. The essay discusses also the implications of World Englishes for English language learning and proposes three points in the context of learning English in China:(1) English language learning should take into account the changes of English;(2)attitude towards global and local English variants should be properly treated;(3)compared with English test results, more attention must be paid to practical communication competences. 相似文献
11.
郝昌明 《Reading and Writing(高中版)》2005,(10)
Every time you go to the supermarket,you come away with your purchases packed in plastic bag s.But wouldn’t it bekinder to the environ-ment if you asked for paper bags instead?The answer is not as easy as it might seem .Environmentalists say there are drawbacks(缺点)to using both plastic bags and paper bag s.Accord-ing to the American Plastics Council(美国塑料委员会),80 per cent of groceries(杂货)in the US are packed in plastic bag s.“The numbers are be-coming huge,”said Vincent Cobb,… 相似文献
12.
Scholarly activities are a collection of academic related activities such as research, teaching and consultation work which result in research outputs such as journals, theses and articles in proceedings. The output will then be disseminated to researchers all over the world by means of the WWW. The four pillars of this scholarship i.e. discovery, teaching, application, and integration of knowledge are supported by research activities which often start with the process of identifying key research questions. The ocean of information available on the interact could sometimes cause the scholars to be ＂lost in Cyber Ocean＂ Thus, this study aims at recognizing the key research questions and suggesting a support environment for scholarly activities for novice researchers. A structured interview was conducted among researchers to capture three pertinent aspects of research activities： becoming proficient in the new field of research, reviewing a research paper and identifying special research interests in specific research areas. The analysis of the interview shows pertinent questions that scholar make while carrying out their research. The feedback provides an overview of the range and altitude of support needed by scholars in seeking information especially in the electronic joumal environment. Based on the result of the study, a proposal for system prototype and future work will be discussed. 相似文献
13.
Robert Thiede 《美中教育评论》2009,6(6):81-84
The School Executive Website will be a one-stop, online site for officials who are looking for educational data, best practices, product reviews, school documents, professional opinions, and/or job-related networking. The format of the website is designed in certain sections similar to other current and popular websites, such as Angie＇s List.com, YouTube, and Linkedin.com. The development and complication of components for a School Executive Website required a survey study to be conducted. This survey was sent to all school superintendents in Ohio to seek out the most relevant resources to place initially in the website. The exploratory study provided important insights for the development of components within the website setup. 相似文献
14.
A method for exact solution to forward degenerate four-wave mixing in transmission geometry for photo refractive media is presented. The effects of pump depletion and light absorption in the nonlinear dynamic media are taken into account. The energy transfer curves are obtained, and the concvision is compared with previous result in the case of pump light to be constant. 相似文献
15.
The mechanical dewatering of activated sludge is difficult due to its high compressibility, which can be improved by electroosmosis. In electroosmosis, direct electric field is applied to sludge cake. Based on the conductivity modes of different sludge beds, a model is presented in which sludge cake consists of two series parts in the circuit: a dewatered bed and an undewatered one. The dewatered bed called solid conductor is mainly made up of immovable water and sludge particles. The undewatered bed includes movable water and solid conductor, which are connected in parallel in the circuit. The model describes the variation of water content with time and electric power consumption as a function of water content in sludge cake, and interprets the reason for the variation of electroosmotic dewatering rate. Comparison with the experimental data for electroosmotic dewatering under constant voltage supports the validity of the model. 相似文献
16.
We established a hydrodynamic model to simulate the pollutant transport and decay process in the case of a pollution incident in the sections of the Yangtze and the Jialing passing through the city area of Chongqing. The Boussinesq assumptions and the Navier-Stokes equations of incompressible fluid were applied to setting up the pollutant diffusion equations and the equations for the decay process. E. coli was taken as the example pollutant, and chloride dosage, light, temperature and ultraviolet intensity were considered in the equations for bacterial decay process. The calculated values of the fluid velocities in the two rivers agree well with corresponding measured results, indicating an ideal accuracy of the model. In simulation, the concentration of E. coli in water was assumed to be zero before the accident. The upriver boundary velocity was ?1.35 m/s for the Jialing flow and 1.75 m/s for the Yangtze flow, and the downriver boundary was water depth set at 0. Simulation results show that the bacteria are transported downstream along the riverbank. A long and narrow pollutant belt develops at 12 h after the start of the accident ascribed to the quick longitudinal transfer. After the pollution sources are cut off, the pollutant concentration decreases slowly, mostly by advection and diffusion, suggesting inadequate self-purification ability of the rivers and the necessity of effective decontaminating measures in the case of a pollution incident. The model can be a useful tool for understanding the polluting situations of an improper discharge incident and evaluating the effects of decontaminating measures for the water body of the Three Gorges Reservoir. 相似文献
17.
In the modern era, the Jewish-Americans were faced with challenges because of the assimilation and modernity environment in the US, and as a result, many of them were in a double bind—to be an assimilated American citizen or to be a traditional Jew. With his work"The Imported Bridegroom", Abraham Cahan contemplated on the subject of Jewish immigration and assimilation and he made a ground-breaking contribution to the establishment of American modernity. This paper intends to analyze Cahan’s attitudes towards assimilation and modernity and how he builds up modernity for all of the Americans. Three characters in"The Imported Bridegroom", who stand for three prototypes of modern Jewish-Americans confronting the overwhelming flood of assimilation and the duty for retaining their traditions, will be analyzed. Through the composition of this work, Cahan tried to spread the Jewish culture on the one hand, and on the other, he warned the peripheral that it was difficult to be assimilated without disasters even if they had made contribution to the formation of modernity. 相似文献
18.
万红芳 《读与写:教育教学刊》2013,(3):13+15
The Red Thread by Nicholas Jose mirrors the famous Chinese literary classic,Six Chapters of a Floating Life by Shen Fu and gives a second chance of life for Shen Fu and Yun.Destined to be attached to the Chinese classic,Shen Fuling and Ruth change their destiny as the incarnations in their protection of love and life.The co-existence of two love stories beyond time and space illustrates a quest for beauty,love and the affirmation of life in common. 相似文献
19.
Due to large-scale dredging operations, a large amount of sludge is inevitably produced. Large areas of land are occupied when the dredged sludge is discarded in the disposal site as waste material. The sludge dewatering with aeration-vacuum (SDAV) method is suit for treating the sludge with high water content and high clay content in the disposal site. The water in the sludge can be discharged out. The volume of the sludge can be reduced quickly, and the recycling of the land can be accelerated by this method. Most importantly, this technique is an efficient way to deal with clogging problems when pumping water from high water content, high clay content dredged sludge. Vacuum degree range tests, the aeration rate range tests, and the influencing factors of sludge dewatering behavior tests were conducted with a self-developed SDAV model test device. Sludge samples were taken from the South-to-North Water Diversion East Line Project in Huai’an White-Horse Lake disposal site, Jiangsu Province, China. The optimal range of vacuum degree and aeration rate were obtained through the test results, and the mechanisms for how the two factors work and how they affect the sludge dewatering behavior were analyzed. The suitable vacuum degree range in SDAV is below 50 kPa, and the suitable aeration rate is about 1.0 m3/h. The low-vacuum degree contributes to reduce the ad-sorption effect of micro-channels on soil particles in filter material and to maintain the arch structures. Aeration has the effects of expansion, disturbance, changing Reynolds number, and dynamic sieve separating. The pump quantity of water per meter of filter tube (m) has different change rules as the vacuum degree changes under different aeration rates. The reason is that the formed arch structures’ conformation and permeability differ greatly under different combined-conditions of vacuum degree and aeration rate. The optimal combined-condition for dewatering the sludge is 35 kPa with 1.0 m3/h. 相似文献
20.
Mun Fie Tsoi Ngoh Khang Goh 《美中教育评论》2008,5(7):29-35
The development of e-learning materials for teaching and learning often needs to be guided by appropriate educational theories or models. As such, this paper provides alternative e-learning design pedagogy, the TSOI Hybrid Learning Model as a pedagogic model for the design of e-learning cognitively in science and chemistry education. This model is hybridized from the Piagetian science learning cycle model and the Kolb＇s experiential learning cycle. The TSOI Hybrid Learning Model represents learning as a cyclical cognitive process of four phases： translating, sculpting, operationalizing and integrating. A major feature is to promote cognitive processing in the learner for active learning proceeding from inductive to deductive. Design specificity in science and chemistry education is illustrated in terms of instructional storyboarding for the developed research-based e-learning product. Learners＇ cognitive ability for example positive concept achievement will be addressed as part of the research data collected. 相似文献