The teaching objective of vocational business English is not only to improve students' English language competence, but also to develop their intercultural communication competence. Based on an analysis of the outcom...The teaching objective of vocational business English is not only to improve students' English language competence, but also to develop their intercultural communication competence. Based on an analysis of the outcome of a survey on cultivation of English majors' intercultural competence among vocational colleges in Guangxi, the paper aims at exploring the framework and cultivating modes of intercultural communication competence for business English majors in vocational colleges.展开更多
Four mineral admixture concrete specimens werefabricated to study the negative effect improvements ofaccelerated curing on the chloride penetration resistance ofordinary concrete. After reaching different initial stre...Four mineral admixture concrete specimens werefabricated to study the negative effect improvements ofaccelerated curing on the chloride penetration resistance ofordinary concrete. After reaching different initial strengths, the specimens were placed in 40, 60, or 80 t water tanks foraccelerated curing. The Coulomb values of the specimens weemeasured with ASTM C1202 experiment at 28, 100, 200, ad300 d. Partial specimens were also selected for rapid chlorideion migration coefficient and mercury intrusion porosimetryexperiments. The experimental results show that theaccelerated curing for ordinary concrete linealy deterioratesthe chloride penetration resistance, whereas the incorporationof mineral admixtures improves the concrete microscopic pore-structures and negative effects. An upper temperature limit of60 t of the accelerated curing is suitable for obtainingsuperior chloride penetration resistance for the mineraladmixture concrete. Pre-curing at a normal temperature of 20t is beneficial for improving the negative effect, which isalso aieviated with increasing testing age as a result of thesuccessive hydration of binder materials in concrete.展开更多
Nowadays, as the international exchange of China becomes increasingly more and China's international status has been greatly improved, cross-cultural communication presents its importance in all walks of our life. In...Nowadays, as the international exchange of China becomes increasingly more and China's international status has been greatly improved, cross-cultural communication presents its importance in all walks of our life. In vocational institutes, especially institutes of foreign languages, how to train talented persons who can not only speak English fluently and adapt to the market economy, but also professionals with various skills is the most important task. This paper analyzes the problems existing in English teaching in vocational institutes at present and discusses how to sort them out successfully.展开更多
In view of the mechanics characteristic of cemented tailings backfill(CTB)at early age,the separation Hopkinson pressure bar test device was used to explore the effects of curing age and impact energy.A total of 48 CT...In view of the mechanics characteristic of cemented tailings backfill(CTB)at early age,the separation Hopkinson pressure bar test device was used to explore the effects of curing age and impact energy.A total of 48 CTB samples with diameter of 50 mm and length of 25 mm were prepared with curing ages of 3,5,7 and 9 d.Impact tests under different impact energy(10,20,30 and 40 J)were carried out.The microstructure of CTB at different ages was analyzed by scanning electron microscopy(SEM).The results show that,the curing age mainly affects the mechanical properties and internal structure of early-age CTB.With increasing curing age,the mechanical properties of early-age CTB change from viscoelasticity to brittleness.The impact energy mainly affects the response of dynamic peak compressive strength to strain rate.Under low strain rate,the structure of CTB is broken,but still has bearing capacity,affecting the formation of later strength.It is concluded that the structural loses completely under the action of high strain rate.Therefore,the control of impact energy and the protection of curing age should be fully considered in actual production process.展开更多
Jellyfish fishing is a special type of fishery that mainly exists in some countries of East and Southeast Asia. China has the largest jellyfish fishery yield in the world with an annual harvest of around 300 thousand ...Jellyfish fishing is a special type of fishery that mainly exists in some countries of East and Southeast Asia. China has the largest jellyfish fishery yield in the world with an annual harvest of around 300 thousand tons. Liaodong Bay is the most important jellyfish fishery ground in China. However, due to the high benefits of jellyfish fishery, which leads to illegal and out-of-season jellyfish fishing occurring each year in Liaodong Bay. Illegal jellyfish fishery in Liaodong Bay is a typical example of the tragedy of the commons. The key problem is that fishermen seek to an illegally initiate jellyfish fishing as early as possible. In this paper, basing on the data of edible jellyfish's biology and ecology, we mainly analyzed the history of jellyfish fishery in China, especially in Liaodong bay, and then we calculated the carry capacity of edible jellyfish in Liaodong Bay which is about 300 thousand tons one year. This number is equal to the recent annual yield of edible jellyfish in China. Furthermore, basing on the carry capacity and reasonable quotas price analysis, we set up a Jellyfish fishing quotas and deficit quotas buyback system which could be a suitable and effective solution for jellyfish fishery management and development in Liaodong Bay at the underlying roots. Although China is the first country with edible jellyfish aquaculture, the annual yield of jellyfish aquaculture is only one fifth of jellyfish fishing. So, there is a very bright developing prospect about edible jellyfish aquaculture in China.展开更多
It is a trend that theories of metaphor are applied in the field of foreign language teactung. It is also necessary for foreign language teaching to enrich itself by adopting of metaphor. Based on metaphors' definiti...It is a trend that theories of metaphor are applied in the field of foreign language teactung. It is also necessary for foreign language teaching to enrich itself by adopting of metaphor. Based on metaphors' definition and functions, this paper looks into the methods of improving and cultivating on language learners' metaphor awareness.展开更多
Steam-cured condition is found to cause larger porosity and worse properties of concrete compared with normal curing condition. For the sake of seeking effective measurements to eliminate this bad effect of steam-cure...Steam-cured condition is found to cause larger porosity and worse properties of concrete compared with normal curing condition. For the sake of seeking effective measurements to eliminate this bad effect of steam-cured condition on concrete, the water sorptivity and pore structure of steam-cured concretes exposed to different subsequent curing conditions were investigated after steam-curing treatment. The capillary absorption coefficient and porosity of the corresponding concretes were analyzed, and their mechanisms were also discussed. The results indicate that water sorptivity and pore structure of steam-cured concrete are greatly influenced by the curing condition used in subsequent ages. Exposure steam-cured concrete to air condition has an obviously bad effect on its properties and microstructures. Adopting subsequent curing of immersing steam-cured concrete into about 20℃ water after steam curing period can significantly decrease its capillary absorption coefficient and porosity. Steam-cured concrete with 7 d water curing has minimum capillary absorption coefficient and total porosity. Its water sorptivity is decreased by 23% compared with standard curing concrete and the porosity is 9.6% lower. Moreover, the corresponding gradient of water sorptivity and porosity of steam-cured concrete both decrease, thus mictostructure of concrete becomes more homogeneous.展开更多
The de-eutrophication abilities and characteristics of Ulva pertusa, a marine green alga, were investigated in Qingdao Yihai Hatchery Center from spring to summer in 2005 by analyzing the dynamic changes in NH4-, NO3-...The de-eutrophication abilities and characteristics of Ulva pertusa, a marine green alga, were investigated in Qingdao Yihai Hatchery Center from spring to summer in 2005 by analyzing the dynamic changes in NH4-, NO3-, NO2- as well as the total dissolved inorganic nitrogen (DIN). The results show that the effluent wastewater produced by fish aquaculture had typical eutrophication levels with an average of 34.3 ~mol L-1 DIN. This level far exceeded the level IV quality of the national seawater standard and could easily lead to phytoplankton blooms in nature if discarded with no treatment. The de-eutrophication abilities of U. pertusa varied greatly and depended mainly on the original eutrophic level the U. pertusa material was derived from. U. pertusa used to living in low DIN conditions had poor DIN removal abilities, while materials cultured in DIN-enriched seawater showed strong de-eutrophication abilities. In other words, the de-eutrophication ability of U. pertusa was evidently induced by high DIN levels. The de-eutrophication capacity of U. pertusa seemed to also be light dependent, because it was weaker in darkness than under illumination. However, no further improvement in the de-eutrophication capacity of U. pertusa was observed once the light intensity exceeded 300 pmolM2 S1. Results of semi-continuous wastewater replacement experiments showed that U. pertusa permanently absorbed nutrients from eutrophicated wastewater at a mean rate of 299 mg/kg fresh weight per day (126 mg/kg DIN during the night, 173 mg/kg in daytime). Based on the above results, engineered de-eutrophication of wastewater by using a U. pertusa filter system seems feasible. The algal quantity required to purify all the eutrophicated outflow wastewater from the Qingdao Yihai Hatchery Center into oligotrophic level I dean seawater was also estimated using the daily discharged wastewater, the average DIN concentration released and the de-eutrophication capacity of U. pertusa.展开更多
As the application undergraduate course colleges and universities, a distinctive talent training system must be formed to achieve the target of practical and innovative talents training, which needs to constantly expl...As the application undergraduate course colleges and universities, a distinctive talent training system must be formed to achieve the target of practical and innovative talents training, which needs to constantly explore and innovate teaching mode. In the paper, talent training model based on the occupation ability development and Excellence Engineer training has carried on the deep discussion and research, thorough study and research.展开更多
This study analyses student's perception toward the use of lnternet to improve reading comprehension. This study aims: (1) to describe the students' perception of the use of Interact as teaching media in learning...This study analyses student's perception toward the use of lnternet to improve reading comprehension. This study aims: (1) to describe the students' perception of the use of Interact as teaching media in learning reading comprehension; (2) to depict the students' perception of the importance oflnternet to access information; and (3) to explain the students' frequency to access Internet. This study uses the descriptive method to reveal the research problems. A questionnaire is used to collect the data. It consists of 20 questions with five options to reveal the students' perception of the use of Internet. The questionnaire is distributed to 120 students who took reading subject at the University of Muhammadiyah Malang. The study shows that (1) The students' perception toward the use of Internet to improve Reading Comprehension subject is positive; (2) According to the students, the use of Internet to access reading materials is very important; and (3) The students frequently access Internet to find the reading materials.展开更多
Dementia is a loss of mental ability (ability to think, remember and make logical conclusions) which, in principle affects normal everyday life of a person. Dementia is not a disease but a group of symptoms that may...Dementia is a loss of mental ability (ability to think, remember and make logical conclusions) which, in principle affects normal everyday life of a person. Dementia is not a disease but a group of symptoms that may cause different diseases. Symptoms include change of behaviour, character and unexpected changes in the mood. Poor quality of nutrition affects significantly the intensity of dementia. Balanced diet that meets healthy safety standards and requirements will satisfy the needs of an organism for vitamins and minerals and special attention should be given to intake of folic acid, vitamin B12 and minerals zinc and selenium. Intake of omega3 fatty acids is a source of fuel for blood vessels, particularly for the ones of the nervous tissues.展开更多
This thesis makes an analysis of the current situation of higher vocational education teachers, illustrates professional ability constitution of teachers engaged in higher vocational education, and discusses the appro...This thesis makes an analysis of the current situation of higher vocational education teachers, illustrates professional ability constitution of teachers engaged in higher vocational education, and discusses the approaches to cultivate young teachers. It finally arrives at a conclusion that in order to enable young teachers to grow into excellent higher vocational education teachers, there should be the cultivation of creativity of young teachers on the basis of cultivation of general ability and special ability; moreover, young teachers should be continuously encouraged, vocational education recognition be improved, and vocational education teachers construction be stabilized.展开更多
AIM: To identify cancer stern cells (CSCs) in human gallbladder carcinomas (GBCs). METHODS: Primary GBC cells were cultured under serum-free conditions to produce floating spheres. The stem-cell properties of th...AIM: To identify cancer stern cells (CSCs) in human gallbladder carcinomas (GBCs). METHODS: Primary GBC cells were cultured under serum-free conditions to produce floating spheres. The stem-cell properties of the sphere-forming cells, including self-renewal, differentiation potential, chemoresistance and tumorigenicity, were determined in vitro or in vivo. Cell surface expression of CD133 was investigated in primary tumors and in spheroid cells using flow cytometry. The sphere-colony-formation ability and tumorigenicity of CD133+ cells were assayed.floating spheroids were generated from primary GBC cells, and these sphere-forming cells could generate new progeny spheroids in serum-free media. Spheroid cells were differentiated under serum-containing conditions with downregulation of the stem cell markers Oct-4, Nanog, and nestin (P 〈 0.05). The differentiated cells showed lower spheroid-colony-formation ability than the original spheroid cells (P 〈 0.05). Spheroid ceils were more resistant to chemotherapeutic reagents than the congenetic adherent cells (P 〈 0.05). Flow cytometry showed enriched CD133+ population in sphereforming cells (P 〈 0.05). CD133+ cells possessed high colony-formation ability than the CD133 population (P 〈 0.01). CD133+ cells injected into nude mice revealed higher tumorigenicity than their antigen-negative counterparts (P 〈 0.05). CONCLUSION: CD133 may be a cell surface marker for CSCs in GBC.展开更多
The market competition is more and more complicated and the employment situation is more severe, which makes innovation and entrepreneurship ability become the way of survival of university students. How to cultivate ...The market competition is more and more complicated and the employment situation is more severe, which makes innovation and entrepreneurship ability become the way of survival of university students. How to cultivate entrepreneurial competence for colleges and universities is worth of caring and considering. The paper researches the cultivation of entrepreneurial competence of vocational college students and proposes the opinions to improve the entrepreneurial competence of Vocational college students.展开更多
文摘The teaching objective of vocational business English is not only to improve students' English language competence, but also to develop their intercultural communication competence. Based on an analysis of the outcome of a survey on cultivation of English majors' intercultural competence among vocational colleges in Guangxi, the paper aims at exploring the framework and cultivating modes of intercultural communication competence for business English majors in vocational colleges.
基金The National Natural Science Foundation of China(No.51178455)the Transformation Program of Science and Technology Achievements of Jiangsu Province(No.BA2015133)
文摘Four mineral admixture concrete specimens werefabricated to study the negative effect improvements ofaccelerated curing on the chloride penetration resistance ofordinary concrete. After reaching different initial strengths, the specimens were placed in 40, 60, or 80 t water tanks foraccelerated curing. The Coulomb values of the specimens weemeasured with ASTM C1202 experiment at 28, 100, 200, ad300 d. Partial specimens were also selected for rapid chlorideion migration coefficient and mercury intrusion porosimetryexperiments. The experimental results show that theaccelerated curing for ordinary concrete linealy deterioratesthe chloride penetration resistance, whereas the incorporationof mineral admixtures improves the concrete microscopic pore-structures and negative effects. An upper temperature limit of60 t of the accelerated curing is suitable for obtainingsuperior chloride penetration resistance for the mineraladmixture concrete. Pre-curing at a normal temperature of 20t is beneficial for improving the negative effect, which isalso aieviated with increasing testing age as a result of thesuccessive hydration of binder materials in concrete.
文摘Nowadays, as the international exchange of China becomes increasingly more and China's international status has been greatly improved, cross-cultural communication presents its importance in all walks of our life. In vocational institutes, especially institutes of foreign languages, how to train talented persons who can not only speak English fluently and adapt to the market economy, but also professionals with various skills is the most important task. This paper analyzes the problems existing in English teaching in vocational institutes at present and discusses how to sort them out successfully.
基金Project(CXZZBS2019126)supported by the Innovative Support Program for Doctoral Students in Hebei Province,ChinaProject(QN2019078)supported by the Science and Technology Research Project of Colleges and University in Hebei Province,ChinaProject(51774137)supported by the National Natural Science Foundation of China。
文摘In view of the mechanics characteristic of cemented tailings backfill(CTB)at early age,the separation Hopkinson pressure bar test device was used to explore the effects of curing age and impact energy.A total of 48 CTB samples with diameter of 50 mm and length of 25 mm were prepared with curing ages of 3,5,7 and 9 d.Impact tests under different impact energy(10,20,30 and 40 J)were carried out.The microstructure of CTB at different ages was analyzed by scanning electron microscopy(SEM).The results show that,the curing age mainly affects the mechanical properties and internal structure of early-age CTB.With increasing curing age,the mechanical properties of early-age CTB change from viscoelasticity to brittleness.The impact energy mainly affects the response of dynamic peak compressive strength to strain rate.Under low strain rate,the structure of CTB is broken,but still has bearing capacity,affecting the formation of later strength.It is concluded that the structural loses completely under the action of high strain rate.Therefore,the control of impact energy and the protection of curing age should be fully considered in actual production process.
基金The National Natural Science Foundation of China(41106094)the Fundamental Research Funds for the Central Universities(DUT14RC(3)112)
文摘Jellyfish fishing is a special type of fishery that mainly exists in some countries of East and Southeast Asia. China has the largest jellyfish fishery yield in the world with an annual harvest of around 300 thousand tons. Liaodong Bay is the most important jellyfish fishery ground in China. However, due to the high benefits of jellyfish fishery, which leads to illegal and out-of-season jellyfish fishing occurring each year in Liaodong Bay. Illegal jellyfish fishery in Liaodong Bay is a typical example of the tragedy of the commons. The key problem is that fishermen seek to an illegally initiate jellyfish fishing as early as possible. In this paper, basing on the data of edible jellyfish's biology and ecology, we mainly analyzed the history of jellyfish fishery in China, especially in Liaodong bay, and then we calculated the carry capacity of edible jellyfish in Liaodong Bay which is about 300 thousand tons one year. This number is equal to the recent annual yield of edible jellyfish in China. Furthermore, basing on the carry capacity and reasonable quotas price analysis, we set up a Jellyfish fishing quotas and deficit quotas buyback system which could be a suitable and effective solution for jellyfish fishery management and development in Liaodong Bay at the underlying roots. Although China is the first country with edible jellyfish aquaculture, the annual yield of jellyfish aquaculture is only one fifth of jellyfish fishing. So, there is a very bright developing prospect about edible jellyfish aquaculture in China.
文摘It is a trend that theories of metaphor are applied in the field of foreign language teactung. It is also necessary for foreign language teaching to enrich itself by adopting of metaphor. Based on metaphors' definition and functions, this paper looks into the methods of improving and cultivating on language learners' metaphor awareness.
基金Project(2008G031-18) supported by the Ministry of Railway Science and Technology Research Foundation of ChinaProject(2010R50034) supported by the Key Science and Technology Innovation Team Program of Zhejiang Province, ChinaProject(2010QZZD018) supported by Leading-edge Research Program of Central South University,China
文摘Steam-cured condition is found to cause larger porosity and worse properties of concrete compared with normal curing condition. For the sake of seeking effective measurements to eliminate this bad effect of steam-cured condition on concrete, the water sorptivity and pore structure of steam-cured concretes exposed to different subsequent curing conditions were investigated after steam-curing treatment. The capillary absorption coefficient and porosity of the corresponding concretes were analyzed, and their mechanisms were also discussed. The results indicate that water sorptivity and pore structure of steam-cured concrete are greatly influenced by the curing condition used in subsequent ages. Exposure steam-cured concrete to air condition has an obviously bad effect on its properties and microstructures. Adopting subsequent curing of immersing steam-cured concrete into about 20℃ water after steam curing period can significantly decrease its capillary absorption coefficient and porosity. Steam-cured concrete with 7 d water curing has minimum capillary absorption coefficient and total porosity. Its water sorptivity is decreased by 23% compared with standard curing concrete and the porosity is 9.6% lower. Moreover, the corresponding gradient of water sorptivity and porosity of steam-cured concrete both decrease, thus mictostructure of concrete becomes more homogeneous.
基金Supported by the Knowledge Innovation Program of the Chinese Adademy of Sciences (No. KZCX3-SW-215)Special Project for Marine Public Walfare Industry (No. 200705010)
文摘The de-eutrophication abilities and characteristics of Ulva pertusa, a marine green alga, were investigated in Qingdao Yihai Hatchery Center from spring to summer in 2005 by analyzing the dynamic changes in NH4-, NO3-, NO2- as well as the total dissolved inorganic nitrogen (DIN). The results show that the effluent wastewater produced by fish aquaculture had typical eutrophication levels with an average of 34.3 ~mol L-1 DIN. This level far exceeded the level IV quality of the national seawater standard and could easily lead to phytoplankton blooms in nature if discarded with no treatment. The de-eutrophication abilities of U. pertusa varied greatly and depended mainly on the original eutrophic level the U. pertusa material was derived from. U. pertusa used to living in low DIN conditions had poor DIN removal abilities, while materials cultured in DIN-enriched seawater showed strong de-eutrophication abilities. In other words, the de-eutrophication ability of U. pertusa was evidently induced by high DIN levels. The de-eutrophication capacity of U. pertusa seemed to also be light dependent, because it was weaker in darkness than under illumination. However, no further improvement in the de-eutrophication capacity of U. pertusa was observed once the light intensity exceeded 300 pmolM2 S1. Results of semi-continuous wastewater replacement experiments showed that U. pertusa permanently absorbed nutrients from eutrophicated wastewater at a mean rate of 299 mg/kg fresh weight per day (126 mg/kg DIN during the night, 173 mg/kg in daytime). Based on the above results, engineered de-eutrophication of wastewater by using a U. pertusa filter system seems feasible. The algal quantity required to purify all the eutrophicated outflow wastewater from the Qingdao Yihai Hatchery Center into oligotrophic level I dean seawater was also estimated using the daily discharged wastewater, the average DIN concentration released and the de-eutrophication capacity of U. pertusa.
文摘As the application undergraduate course colleges and universities, a distinctive talent training system must be formed to achieve the target of practical and innovative talents training, which needs to constantly explore and innovate teaching mode. In the paper, talent training model based on the occupation ability development and Excellence Engineer training has carried on the deep discussion and research, thorough study and research.
文摘This study analyses student's perception toward the use of lnternet to improve reading comprehension. This study aims: (1) to describe the students' perception of the use of Interact as teaching media in learning reading comprehension; (2) to depict the students' perception of the importance oflnternet to access information; and (3) to explain the students' frequency to access Internet. This study uses the descriptive method to reveal the research problems. A questionnaire is used to collect the data. It consists of 20 questions with five options to reveal the students' perception of the use of Internet. The questionnaire is distributed to 120 students who took reading subject at the University of Muhammadiyah Malang. The study shows that (1) The students' perception toward the use of Internet to improve Reading Comprehension subject is positive; (2) According to the students, the use of Internet to access reading materials is very important; and (3) The students frequently access Internet to find the reading materials.
文摘Dementia is a loss of mental ability (ability to think, remember and make logical conclusions) which, in principle affects normal everyday life of a person. Dementia is not a disease but a group of symptoms that may cause different diseases. Symptoms include change of behaviour, character and unexpected changes in the mood. Poor quality of nutrition affects significantly the intensity of dementia. Balanced diet that meets healthy safety standards and requirements will satisfy the needs of an organism for vitamins and minerals and special attention should be given to intake of folic acid, vitamin B12 and minerals zinc and selenium. Intake of omega3 fatty acids is a source of fuel for blood vessels, particularly for the ones of the nervous tissues.
文摘This thesis makes an analysis of the current situation of higher vocational education teachers, illustrates professional ability constitution of teachers engaged in higher vocational education, and discusses the approaches to cultivate young teachers. It finally arrives at a conclusion that in order to enable young teachers to grow into excellent higher vocational education teachers, there should be the cultivation of creativity of young teachers on the basis of cultivation of general ability and special ability; moreover, young teachers should be continuously encouraged, vocational education recognition be improved, and vocational education teachers construction be stabilized.
文摘AIM: To identify cancer stern cells (CSCs) in human gallbladder carcinomas (GBCs). METHODS: Primary GBC cells were cultured under serum-free conditions to produce floating spheres. The stem-cell properties of the sphere-forming cells, including self-renewal, differentiation potential, chemoresistance and tumorigenicity, were determined in vitro or in vivo. Cell surface expression of CD133 was investigated in primary tumors and in spheroid cells using flow cytometry. The sphere-colony-formation ability and tumorigenicity of CD133+ cells were assayed.floating spheroids were generated from primary GBC cells, and these sphere-forming cells could generate new progeny spheroids in serum-free media. Spheroid cells were differentiated under serum-containing conditions with downregulation of the stem cell markers Oct-4, Nanog, and nestin (P 〈 0.05). The differentiated cells showed lower spheroid-colony-formation ability than the original spheroid cells (P 〈 0.05). Spheroid ceils were more resistant to chemotherapeutic reagents than the congenetic adherent cells (P 〈 0.05). Flow cytometry showed enriched CD133+ population in sphereforming cells (P 〈 0.05). CD133+ cells possessed high colony-formation ability than the CD133 population (P 〈 0.01). CD133+ cells injected into nude mice revealed higher tumorigenicity than their antigen-negative counterparts (P 〈 0.05). CONCLUSION: CD133 may be a cell surface marker for CSCs in GBC.
文摘The market competition is more and more complicated and the employment situation is more severe, which makes innovation and entrepreneurship ability become the way of survival of university students. How to cultivate entrepreneurial competence for colleges and universities is worth of caring and considering. The paper researches the cultivation of entrepreneurial competence of vocational college students and proposes the opinions to improve the entrepreneurial competence of Vocational college students.