This paper reports the induced growth of high quality ZnO thin film by crystallized amorphous ZnO. Firstly amorphous ZnO was prepared by solid-state pyrolytic reaction, then by taking crystallized amorphous ZnO as see...This paper reports the induced growth of high quality ZnO thin film by crystallized amorphous ZnO. Firstly amorphous ZnO was prepared by solid-state pyrolytic reaction, then by taking crystallized amorphous ZnO as seeds （buffer layer）, ZnO thin films have been grown in diethyene glycol solution of zinc acetate at 80 ℃. X-ray Diffraction curve indicates that the films were preferentially oriented [001] out-of-plane direction of the ZnO. Atomic force microscopy and scanning electron microscopy were used to evaluate the surface morphology of the ZnO thin film. Photoluminescence spectrum exhibits a strong ultraviolet emission while the visible emission is very weak. The results indicate that high quality ZnO thin film was obtained.展开更多
The Fock-Darwin system is studied in noncommutative quantum mechanics. We not only obtain its energy eigenvalues and eigenstates in noncommutative phase space, but also give an electron orbit description as well as th...The Fock-Darwin system is studied in noncommutative quantum mechanics. We not only obtain its energy eigenvalues and eigenstates in noncommutative phase space, but also give an electron orbit description as well as the general expressions of the magnetization and the susceptibility in a noncommutative situation. Further, we discuss two particular cases of temperature and present some interesting results different from those obtained from usual quantum mechanics such as the susceptibility dependent on a magnetic field at high temperatures, the occurrence of the magnetization in a zero magnetic field and zero temperature limit, and so on.展开更多
In the present paper the author reviews the viewpoint of 'preventive treatment of diseases' in the ancient literature of traditional Chinese medicine (TCN) and its clinical application from (1) prevention firs...In the present paper the author reviews the viewpoint of 'preventive treatment of diseases' in the ancient literature of traditional Chinese medicine (TCN) and its clinical application from (1) prevention first before the occurrence of diseases; and (2) preventing development after onset of diseases. In the preventive treatment of diseases, the ancient Chinese doctors usually (1) regulated qi of both Conception Vessel and Governor Vessel for health care; (2) performed regular moxibustion; and (3) applied plaster to the acupoint in summer for treating winter-diseases. In the treatment of diseases after onset, the ancient Chinese usually (1) tried best to make early diagnosis and early treatment; and (2) strengthened the related internal organ in advance to check their development; and (3) employed appropriate remedies to recuperate the patient's health.展开更多
Mechanical forces control a multitude of biological responses in various cells and tissues.The periodontal ligament,located between the tooth’s root and alveolar bone,is a major tissue compartment that is incessantly...Mechanical forces control a multitude of biological responses in various cells and tissues.The periodontal ligament,located between the tooth’s root and alveolar bone,is a major tissue compartment that is incessantly subjected to such mechanical stimulation through either normal or abnormal oral functionality.It is now known that mechanical stimulation activates periodontal ligament stem cells(PDLSCs)to modulate periodontal immunity and regulate inflammation–a basic feature of periodontal disease that affects virtually every human during their lifetime.For instance,shear stress induces the expression of immunomodulatoryrelated gene,indoleamine 2,3-dioxygenase(IDO).IDO cleaves l-tryptophan,resulting in increased l-kynurenine levels that,in turn,further promote regulatory T-cell differentiation and inhibit T cell proliferation.These and other related data reinforce the notion that mechanical stimulation plays a crucial role in controlling inflammation and immunomodulation of periodontal tissues.Further investigations,however,are warranted to evaluate the immunomodulatory features of PDLSCs so as to understand the pathological basis of periodontal disease and translate these into clinical interventions.展开更多
Conventional control systems used for regulated power supplies,including the proportional integral and derivation(PID)controller,have some serious disadvantages.The PID controller has a delayed feedback associated wit...Conventional control systems used for regulated power supplies,including the proportional integral and derivation(PID)controller,have some serious disadvantages.The PID controller has a delayed feedback associated with the control action and requires a lot of mathematical derivations.This paper presents a novel controlling system based on the artificial neural network(ANN),which can be used to regulate the output voltage of the DC power supply.Using MATLABTM,the designed control system was tested and analyzed with two types of back-propagation algorithms.This paper presents the results of the simulation that includes sum-squared error(SSE)and mean-squared error(MSE),and gives a detailed comparison of these values for the two algorithms.Hardware verification of the new system,using RS232 interface and Microsoft Visual Basic 6.0,was implemented,showing very good consistency with the simulation results.The proposed control system,compared to PID and other conventional controllers,requires less mathematical derivation in design and it is easier to implement.展开更多
基金Project supported by the ＂863＂ High Technology Research Program in China （Grant No 2001AA311120）, the National Natural Science Foundation of China （Grant No 60278031）, the Innovation Project of Chinese Academy of Sciences, the Jilin Province Science and Technology Development Program Project of China （Grant No 20040564） and the Young Innovation Function of the Changchun Institute of 0ptics, Fine Mechanics and Physics, Chinese Academy of Sciences （Grant No Q03M23Z）.
文摘This paper reports the induced growth of high quality ZnO thin film by crystallized amorphous ZnO. Firstly amorphous ZnO was prepared by solid-state pyrolytic reaction, then by taking crystallized amorphous ZnO as seeds （buffer layer）, ZnO thin films have been grown in diethyene glycol solution of zinc acetate at 80 ℃. X-ray Diffraction curve indicates that the films were preferentially oriented [001] out-of-plane direction of the ZnO. Atomic force microscopy and scanning electron microscopy were used to evaluate the surface morphology of the ZnO thin film. Photoluminescence spectrum exhibits a strong ultraviolet emission while the visible emission is very weak. The results indicate that high quality ZnO thin film was obtained.
基金supported by the National Natural Science Foundation of China (Grant Nos 10575026 and 10875035)the Natural Science Foundation of Zhejiang Province,China (Grant No Y607437)
文摘The Fock-Darwin system is studied in noncommutative quantum mechanics. We not only obtain its energy eigenvalues and eigenstates in noncommutative phase space, but also give an electron orbit description as well as the general expressions of the magnetization and the susceptibility in a noncommutative situation. Further, we discuss two particular cases of temperature and present some interesting results different from those obtained from usual quantum mechanics such as the susceptibility dependent on a magnetic field at high temperatures, the occurrence of the magnetization in a zero magnetic field and zero temperature limit, and so on.
文摘In the present paper the author reviews the viewpoint of 'preventive treatment of diseases' in the ancient literature of traditional Chinese medicine (TCN) and its clinical application from (1) prevention first before the occurrence of diseases; and (2) preventing development after onset of diseases. In the preventive treatment of diseases, the ancient Chinese doctors usually (1) regulated qi of both Conception Vessel and Governor Vessel for health care; (2) performed regular moxibustion; and (3) applied plaster to the acupoint in summer for treating winter-diseases. In the treatment of diseases after onset, the ancient Chinese usually (1) tried best to make early diagnosis and early treatment; and (2) strengthened the related internal organ in advance to check their development; and (3) employed appropriate remedies to recuperate the patient's health.
基金supported by the NSRF via the Program Management Unit for Human Resources&Institutional Development,Research and Innovation(B16F640118 to T.O.and H.E.)R.S.is supported by the C2F Scholarship at Chulalongkorn UniversityJ.C.is supported by the Ratchadapiset Somphot Fund for Postdoctoral Fellowship,Chulalongkorn University.
文摘Mechanical forces control a multitude of biological responses in various cells and tissues.The periodontal ligament,located between the tooth’s root and alveolar bone,is a major tissue compartment that is incessantly subjected to such mechanical stimulation through either normal or abnormal oral functionality.It is now known that mechanical stimulation activates periodontal ligament stem cells(PDLSCs)to modulate periodontal immunity and regulate inflammation–a basic feature of periodontal disease that affects virtually every human during their lifetime.For instance,shear stress induces the expression of immunomodulatoryrelated gene,indoleamine 2,3-dioxygenase(IDO).IDO cleaves l-tryptophan,resulting in increased l-kynurenine levels that,in turn,further promote regulatory T-cell differentiation and inhibit T cell proliferation.These and other related data reinforce the notion that mechanical stimulation plays a crucial role in controlling inflammation and immunomodulation of periodontal tissues.Further investigations,however,are warranted to evaluate the immunomodulatory features of PDLSCs so as to understand the pathological basis of periodontal disease and translate these into clinical interventions.
文摘Conventional control systems used for regulated power supplies,including the proportional integral and derivation(PID)controller,have some serious disadvantages.The PID controller has a delayed feedback associated with the control action and requires a lot of mathematical derivations.This paper presents a novel controlling system based on the artificial neural network(ANN),which can be used to regulate the output voltage of the DC power supply.Using MATLABTM,the designed control system was tested and analyzed with two types of back-propagation algorithms.This paper presents the results of the simulation that includes sum-squared error(SSE)and mean-squared error(MSE),and gives a detailed comparison of these values for the two algorithms.Hardware verification of the new system,using RS232 interface and Microsoft Visual Basic 6.0,was implemented,showing very good consistency with the simulation results.The proposed control system,compared to PID and other conventional controllers,requires less mathematical derivation in design and it is easier to implement.
