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Search Results: 1 - 10 of 118965 matches for " Xin Zhang "
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Applying the mutation of Bacillus subtilis and the optimization of feather fermentation medium to improve Keratinase activity  [PDF]
Xin Zhang
Advances in Biological Chemistry (ABC) , 2012, DOI: 10.4236/abc.2012.21008
Abstract: Energetic Bacillus subtilis was preliminarily isolated from feather meal selection medium experiment, which could be used to produce Keratinase. Through using the ultraviolet ray produced by ultraviolet light and the compound mutation of sodium nitrite solution, a mutated strain was produced which can yield Kerati-nase with a high activity. The activity of Keratinase was 75.9% higher than that before the compound mutation. This was achieved by optimizing the fermentation medium of mutated strain. The optimum fermentation medium had the parameters as feather meal 5.5%, maize silage 0.8%, K+ 0.018 mol/L, Mg2+ 0.065 mol/L, Ca2+ 0.072 mol/L, Fe2+ 0.010 mol/L, and Na+ 0.088 mol/L. Based on the optimized fermentation medium, the highest yielding rate for producing enzyme was 1.117 U/mL, 25.22% higher than that before the optimization. The amino acid in the fermentation medium fluid reached 22.66 mg/mL. This paper presents a simple, and low cost way to produce high quality bio-fermentation feather meal.
Credit Constraints and Decisions in Exports: Theory under Asymmetric Information  [PDF]
Xin Zhang
Journal of Mathematical Finance (JMF) , 2012, DOI: 10.4236/jmf.2012.23026
Abstract: This paper examines why credit constraints for domestic and exporting firms arise in a setting where banks do not observe firms’ productivities. To maintain incentive-compatibility, banks lend below the amount needed for first-best production. The longer time needed for export shipments induces a tighter credit constraint on exporters than on purely domestic firms, even in the exporters’ home market. Greater risk faced by exporters also affects the credit extended by banks. Extra fixed costs reduce exports on the extensive margin, but can be offset by collateral held by exporting firms.
Air Marshal’s Investigation Power’s Research in Dealing with Hijacking Criminals  [PDF]
Xin Zhang
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.33026
Abstract: The power of investigation refers to the country’s investigation organ and investigators in order to achieve the purpose of the investigation: in accordance with legal procedures, using special investigative means to carry out the investigation activities of power. As the youngest police classification in China, Chinese air marshal is the important member that first faces the hijacking suspects, and the effective implementation of its investigation right is crucial on how to identify, investigate and prevent the hijacking behavior. This paper, using empirical analysis, comparative analysis and other research methods, aims to analyze and discuss how to overcome the defects of current Chinese air marshal’s investigation power existing in the hijacking in criminal cases, in order to obtain the earliest direct investigation clue, find the suspect, define the direction and determine the specific target of investigation, and then puts forward the conception and suggestion of some reform.
Numerical Simulation Study on the Detection of Weak Structural Plane of Rock Slope by Using 3D Electrical Resistivity Tomography  [PDF]
Xin Zhang
Engineering (ENG) , 2016, DOI: 10.4236/eng.2016.87041
Abstract: The weak structure plane is an important factor affecting the stability of rock slope, and detecting the spatial structure of the weak structural plane is beneficial to analyze the stability of the slope and estimate the quantity of the landslide. Based on 3D electrical resistivity tomography, a model of rock slope with weak structure plane is established, and the characteristics of three-dimensional resistivity imaging of weak structure plane under different ground water conditions are simulated. The results show that the weak structural plane has a better reflection in 3D electrical resistivity tomography; the distribution of weak structural plane of 3D resistivity imaging can be roughly determined under different ground water conditions; the three-dimensional electrical resistivity tomography is feasible in the detection of weak structural plane of rock slope.
University Students’ Employability Skills Model Based on Chinese Employer Perspective  [PDF]
Xiaobing Zhang, Xin Zou
Journal of Human Resource and Sustainability Studies (JHRSS) , 2013, DOI: 10.4236/jhrss.2013.13005
Abstract: The employability and the employability skills of the university students in China are now being the most important capacity which the employers pay the highest attention to. The aim of this research was to identify the university students’ employability skills and college students’ employability skills framework to reinforce the employability research and the field of human resource development (HRD) in the Chinese context. From the perspective of the employers, using the methods of interview and questionnaire, this paper studied the contents of the students’ employability skills which the Chinese employers recognized and got the model of university students’ employability skills. The results showed that college student’s personal characteristics perceived by the service industry employers and the manufacture industry employers major focused on honesty, independence, self-confidence, adaptability, and enthusiasm. Basic knowledge which perceived by the service industry employers and the manufacture industry employers centralized political knowledge, and economic knowledge. Interpersonal relationship, teamwork, strain capacity, problem handling capacity, leadership, information technology software applications, and presentation skills were the abilities at present and in the next five years that both industry employers thought very important skills and abilities. The conclusions can be got that the employability skills perceived by Chinese employers whether in service industry or in manufacture industry include personal qualities, basic knowledge, skills and abilities. The employability skills framework perceived by employers at present in service industry and in manufacture industry is slightly different. On the contrary, it is surprising that the employability skills at present and in the next 5 years perceived by service industry employers or manufacture industry employers have a significant difference alternatively. Suggestions on managerial implications and future research directions are put forward respectively.
The Market Pricing of Information Risk: From the Perspective of the Generating and Utilizing of Information  [PDF]
Xindong Zhang, Xin Li
Journal of Financial Risk Management (JFRM) , 2014, DOI: 10.4236/jfrm.2014.34014
Abstract: Generating and utilizing are the two sources of the information risk, reflecting the quality of financial reporting and investors’ information interpreting ability respectively. Using accrual quality to represent the financial reporting quality and the earnings transparency to represent investors’ information interpreting ability, we examine the correlation among them. By combining the generating and utilizing steps of information, we construct a two-dimensional information risk factor, which equals the excess return of portfolios in high-risk areas subtract that in low-risk areas. Then, taking the Fama-MacBeth two-stage cross-sectional regression procedure, we test whether the information risk factor is a pricing factor with individual stocks and industry portfolios respectively, and the empirical results support the point that information risk is priced by market.
An Ecologic Approach to Chinese Traditional Ethnic Sports Education  [PDF]
Xin Zhang, Siyong Xia
Advances in Physical Education (APE) , 2015, DOI: 10.4236/ape.2015.51006
Abstract: This research aims to discuss and explore, from the perspective of Ecologic Education, the ecologic characteristics of the traditional Chinese sports education and the developmental direction of the teaching model of Chinese traditional ethnic sports education under the guide of the view of Ecologic Education. Firstly, this research explores the background of the appearing of the view of Ecologic Education and the basic ideas of Ecologic Education. After that, the writer of this article comes up with the ecologic characteristics particularly embraced in Chinese traditional ethnic sports education. These characteristics or features include the educational aim of pursuing harmony, the developmental model of advocating co-existence, the knowledge view of cultural circumstance, and the interactive and win-win relationship between teachers and students. After the analysis made above, the writer of this article further argues that under the view of Ecologic Education pursuing life education full of spirituality, focusing on the active construction of knowledge and exploring multiple ways of enculturation can be the very direction of the teaching model of Chinese traditional ethnic sports education.
The Analysis of the Treatment of Rhabdomyolysis by Snake Bites  [PDF]
Xianglin Cheng, Xin Zhang
Yangtze Medicine (YM) , 2018, DOI: 10.4236/ym.2018.22010
Abstract: Objective: To explore the treatment measure of rhabdomyolysis caused by snake bites, and provide guidance for further prevention and control of snake bites. Methods: To retrospectively analyze the 841 cases of serpentine bites in our hospital from January 2006 to July 2017; 127 cases of patients with rhabdomyolysis syndrome were screened out, and their clinical manifestations, laboratory results, related treatment and prognosis were analyzed. Results: 127 cases patients were rhabdomyolysis out of 841 cases, 28 cases patients developed acute renal failure; treatment measures included local wound treatment, application of tetanus antitoxin, anti-snake venom serum, anti-infection, fluid “hydration” and diuretic, alkaline urine and hybrid renal replacement therapy. 112 cases were cured, improved conditions in 9 cases, 3 cases of death, 3 cases uncured. The improvement rate of is 95.26% after treatment. Conclusion: The rhabdomyolysis had a high incidence in snake bite patients, severe cases often developed acute renal failure. Serum myopsin and related biochemical blood tests could be used to diagnose rhabdomyolysis quickly. Combined treatment methods are the main measure to increase the cured rate and decrease the death rate.
University Flipped Class Model in China  [PDF]
Shuo Zhao, Xin Zhang
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.73043
Abstract:
Under the wave of information-based education reform in China, the flipped classroom originated from American educational circles, guided by constructivism and relying on modern information technology, as an innovative teaching mode, is attracting the attention and favor of our educational circles with its unique advantages. Guided by the reform of education, this paper conducted a research on the application of flipped classroom teaching mode in university teaching. In the half-year term teaching experiment, the teaching effect of this mode and the acceptability of students were mainly discussed through questionnaires and empirical research on final scores. The result shows that compared with conventional teaching, this model can significantly improve students’ learning effect, optimize the learning process, improve students’ learning attitude, and is recognized by the majority of students.
Can black holes be torn up by phantom dark energy in cyclic cosmology?
Zhang, Xin
High Energy Physics - Phenomenology , 2007, DOI: 10.1140/epjc/s10052-009-0967-5
Abstract: Infinitely cyclic cosmology is often frustrated by the black hole problem. It has been speculated that this obstacle in cyclic cosmology can be removed by taking into account a peculiar cyclic model derived from loop quantum cosmology or the braneworld scenario, in which phantom dark energy plays a crucial role. In this peculiar cyclic model, the mechanism of solving the black hole problem is through tearing up black holes by phantom. However, using the theory of fluid accretion onto black holes, we show in this paper that there exists another possibility: that black holes cannot be torn up by phantom in this cyclic model. We discussed this possibility and showed that the masses of black holes might first decrease and then increase, through phantom accretion onto black holes in the expanding stage of the cyclic universe.
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