XIN LI - Academia.edu (original) (raw)
Papers by XIN LI
Journal of the chemical society of pakistan, 2019
A new method of quantifying the contents of riboflavin (RF) and pyridoxine (PY) in their mixed so... more A new method of quantifying the contents of riboflavin (RF) and pyridoxine (PY) in their mixed solution was introduced in this study. A mathematical model was established to calculate the actual concentration of PY (Z) based on the apparent concentrations of PY (Y) and RF (X), which were quantified directly when RF and PY were mixed together. First, a linear relationship was found between Y and Z with a high coefficient, which defines fluorescence quenching efficiency. Second, a curvilinear equation was established between the apparent concentration of X and the fluorescence quenching efficiency (k) of PY. The actual concentration of PY could be obtained by using the two equations. The established mathematical model was verified, and the relative error of the calculated PY value was below 2.5%. The upper limit of fluorescence spectrophotometry quantification was up to 20 μg/mL for both RF and PY. Compared with RP-HPLC, this method is convenient in terms of sample pretreatment, as we...
Journal of the chemical society of pakistan, 2021
The first mesoporous silica nanoparticles (MSNs) supported atomically precise palladium nanoclust... more The first mesoporous silica nanoparticles (MSNs) supported atomically precise palladium nanoclusters catalyzed alcohol oxidation reactions in water have been achieved. The catalysts was synthesized with simple impregnation method and well characterized by TEM, FT-IR, XPS anddiffuse reflectance optical spectrum and the results proved that the Pd nanoclustersimmobilized into the pores of MSNs.The as-prepared catalyst show excellent activity for the alcohol oxidation reactions with high yield under extremely mild aqueous conditions utilizes 1 atmosphere of molecular oxygen as sole oxidant. The features of clean system, gram-scale oxidation and easy recovery catalyst make this method cost effectively and environmentally benign.
Chinese Optics Letters, 2017
We propose and experimentally demonstrate an adaptive multiple-input multiple-output (MIMO) mode ... more We propose and experimentally demonstrate an adaptive multiple-input multiple-output (MIMO) mode switching scheme for an indoor visible light communication system combined with orthogonal frequency division multiplexing modulation. Only requiring 1 bit feedback from the receiver, the MIMO mode at the transmitter switches between spatial multiplexing and transmit diversity adapting to the channel correlation. In such a way, we can take advantage of both spatial multiplexing and transmit diversity, where the spatial multiplexing benefits for its multiplexing gain in the low channel correlation environment, and the transmit diversity is robust to high channel correlation. Experimental results validate the performance improvement over the pure spatial multiplexing or transmit diversity system. With the increasing of the channel correlation, the measured bit error rates of the proposed system are below the 7% pre-forward error correction (pre-FEC) limit of 3.8 × 10 −3 when the transmitted data rate is 50 Mb/s, and below the 20% pre-FEC threshold of 5.0 × 10 −2 when the transmitted data rate is raised up to 100 Mb/s. OCIS codes: 060.2605, 060.4080.
Chinese Optics Letters, 2017
In order to improve the frequency and precision of radiometric calibration, the automated vicario... more In order to improve the frequency and precision of radiometric calibration, the automated vicarious calibration system (AVCS) is developed and deployed at the Dunhuang test site to perform vicarious calibration without the in situ manned measurements. The surface and atmospheric parameters are automatically collected by AVCS. An absolute radiometric calibration approach based on AVCS is proposed. Six successful calibrations of the Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) are conducted. The results are in good agreement with the on-board calibration system with all the relative differences less than 4%. It enables us to monitor the change of a sensor over long time scales.
Chinese Optics Letters, 2016
Two different methods from graphic processing unit(GPU) and central processing unit(CPU) are prop... more Two different methods from graphic processing unit(GPU) and central processing unit(CPU) are proposed to suitably optimize look-up table algorithms of computer generated holography(CGH). The numerical simulations and experimental results show that we can reconstruct a good quality object. The computation of CGH for a three-dimensional(3D) dynamic holographic display can also be sped up by programming with our proposed method. It can optimize both file loading and the inline calculation process. The phase-only CGH with gigabyte data for reconstructing 10 MB object samplings is generated. In addition, the proposed method effectively reduced time costs of loading and writing offline tables on a CPU. It is believed the proposed method can provide high speed and huge data CGH for 3D dynamic holographic displays in the near future.
Chinese Optics Letters, 2016
We propose and experimentally demonstrate a simple visible light communication system by combinin... more We propose and experimentally demonstrate a simple visible light communication system by combining an adaptive transmission technique with orthogonal frequency division multiplexing. In the adaptive transmission scheme, power allocation is performed in such a way as to maximize the channel capacity under electric power constraints, and adaptive modulation is then introduced to achieve the maximum data rate given a target bit error rate. Experimental results show that spectrum efficiency can be greatly improved through this adaptive transmission technique.
2003 5th International Conference on ASIC Proceedings (IEEE Cat No 03TH8690) ICASIC-03, 2003
The tree-pair method is a new approach of tree enumeration for symbolic network analysis, which b... more The tree-pair method is a new approach of tree enumeration for symbolic network analysis, which based on the theorem that the determinant of a closed network is equal to the sum of all valid trees' values and all valid tree-pairs' values of the circuit's graph. Thus the key to calculate the determinant is to find the trees and tree-pairs in the graph. The algorithm and the program scheme to find out all valid trees and valid tree-pairs are presented in this paper. A simulator of symbolic analysis by the algorithm is implemented. Some examples are solved successfully and shown in the paper.
Microbial cell factories, Jan 20, 2016
Nitrogen fixation has been established in protokaryotic model Escherichia coli by transferring a ... more Nitrogen fixation has been established in protokaryotic model Escherichia coli by transferring a minimal nif gene cluster composed of 9 genes (nifB, nifH, nifD, nifK, nifE, nifN, nifX, hesA and nifV) from Paenibacillus sp. WLY78. However, the nitrogenase activity in the recombinant E. coli 78-7 is only 10 % of that observed in wild-type Paenibacillus. Thus, it is necessary to increase nitrogenase activity through synthetic biology. In order to increase nitrogenase activity in heterologous host, a total of 28 selected genes from Paenibacillus sp. WLY78 and Klebsiella oxytoca were placed under the control of Paenibacillus nif promoter in two different vectors and then they are separately or combinationally transferred to the recombinant E. coli 78-7. Our results demonstrate that Paenibacillus suf operon (Fe-S cluster assembly) and the potential electron transport genes pfoAB, fldA and fer can increase nitrogenase activity. Also, K. oxytoca nifSU (Fe-S cluster assembly) and nifFJ (elec...
Chinese Optics Letters, 2015
A surprising phenomenon can be discovered by using femtosecond double-pulse ablation of silicon a... more A surprising phenomenon can be discovered by using femtosecond double-pulse ablation of silicon and germanium in ethanol. The ablation areas present an oscillation increase phenomenon when the pulse delay increases from 200 fs to 1 ps in the fluence range of 0.5-0.6 J∕cm 2. In contrast, the ablation areas exhibit an oscillation decrease phenomenon as the pulse delay increases when the laser fluence F < 0.5 J∕cm 2 , which is consistent with the results of the experiment in air. It is considered that the adjustment of the photon-electron coupling efficiency by pulse train technology plays an important role in the ablation process.
Genes & Genomics, 2013
Myogenic enhancer transcription factor 2c (MEF2c), one of the members of the MEF2 family of trans... more Myogenic enhancer transcription factor 2c (MEF2c), one of the members of the MEF2 family of transcription factors, plays an important role in mammalian muscle development. However, the role of MEF2c in avian muscle development still remains unclear. To understand the function of MEF2c in avian muscle development, we first cloned the duck MEF2c coding domain sequence (CDS) and analyzed MEF2c expression in duck muscle tissues of embryos from 10 days of incubation to 1 week after birth using real-time PCR technology. The results showed that the duck MEF2c CDS consists of 1,398 nucleotides that encode 465 amino acids. The MEF2c duck protein contains a MADS domain, a MEF2 domain and a HJURP_C domain with high homology to related proteins in other organisms. Different expression levels of MEF2c were found in skeletal, smooth and cardiac muscle. Therefore, these results indicated that duck MEF2c has two conserved domains (a MADS and a MEF2 domain), is an indispensable regulator of muscle development, and plays an important role in the development of duck muscle.
Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology, Jan 20, 2015
To investigate the relationship between level of Th17/CD4+T cell ratio in peripheral blood and po... more To investigate the relationship between level of Th17/CD4+T cell ratio in peripheral blood and postoperative complications in patients with hepatitis B virus (HBV)-related cirrhosis after orthotopic liver transplantation (OLT). Fifty-one patients with HBV-related cirrhosis who received OLT were enrolled in this study. Flow cytometry analysis was performed to measure the proportion of Th17 cells to CD4+T cells at the following time points:pre-OLT, and post-OLT days 7, 14 and 21. The relevant hepatic biochemistry indexes, serum concentration of FK506 and level of procalcitonin (PCT) were detected for all patients after OLT. The transplant recipients were divided into four groups according to the postoperative complication, which included acute rejection (AR, n =12), postoperative infection (POI, n =10), transient intrahepatic cholestasis (TIHC, n =12) and no complications (n =17). The Th17/CD4+T cell frequencies were notably higher in the AR patients after OLT (vs. before OLT, P less ...
Chinese Optics Letters, 2014
We propose a method to improve the quality of the reconstructed images based on compressive sensi... more We propose a method to improve the quality of the reconstructed images based on compressive sensing principles. The pseudo-inverse matrix and the total variation minimization algorithms are combined to reduce the sampling number of the computer generated hologram. Numerical simulations are performed and the results indicate that the peak signal to noise ratio is increased and the sampling ratio is decreased at the same time for holographic display.
Chinese Optics Letters, 2013
This letter presents a label-free biomolecular imaging technique based on white-light interferome... more This letter presents a label-free biomolecular imaging technique based on white-light interferometry and spectral detection. The method measures thickness changes caused by specific binding between biomolecules to detect the presence of certain analyte. A spectrum-shifting algorithm is developed to resolve the thickness information from the spectrum. The axial resolution of the experimental instrument can reach ∼1 nm, thereby enabling detection of trace amounts (∼1 ng/mm 2) of proteins or DNA. This letter also presents two experiments to prove the feasibility of the method for detecting proteins and DNA without fluorescent labeling.
Advanced Materials Research, 2009
This work is focused on design and fabrication of a hybrid-type electrostatic silicon microgrippe... more This work is focused on design and fabrication of a hybrid-type electrostatic silicon microgripper integrated vacuum tool. Vacuum tools are integrated in this novel microgripper in order to improve its pick and place capability. Surface and bulk micromachining technology is employed to fabricate the microgripper from single crystal silicon wafer (i.e., no silicon on insulator wafer is used). And the bonding technology is used to form the gas pipes for the vacuum tool. The linear motion of the microactuator is converted into a rotational gripping motion by a system of spring beams. At a driving voltage of 80V, a deflection of 25μm at the arm tip of the gripper is achieved.
Oncology letters, 2013
MicroRNAs (miRNAs), present in the serum in a stable and reproducible manner, may be used as biom... more MicroRNAs (miRNAs), present in the serum in a stable and reproducible manner, may be used as biomarkers for various diseases. Few studies have previously investigated circulating miRNAs in the peripheral blood of breast cancer (BC) patients. To identify the role of serum miR-182 levels in BC, the present study detected miR-182 levels in the serum of 46 BC patients and 58 controls, by quantitative PCR. The results showed that the serum miR-182 levels in BC patients were significantly higher compared with the serum of healthy controls (P<0.01). The miR-182 was also overexpressed in the BC tissues compared with the para-carcinoma tissues. Furthermore, the serum levels of miR-182 in the estrogen receptor (ER)-positive patients were considerably lower compared with those in the ER-negative patients. The serum levels of miR-182 in the progesterone receptor (PR)-positive patients were also found to be lower compared with those in the PR-negative patients. The current study highlights re...
Chinese Optics Letters, 2015
With the development of the micro/nanolithography, the optic-optic or optic-electronic modulation... more With the development of the micro/nanolithography, the optic-optic or optic-electronic modulation devices with different pixel shapes and sizes can be used for three-dimensional (3D) dynamical holographic display. The influence of different parameters of the modulation devices on the image quality of the 3D reconstructed object is analyzed for two cases: the phase-only computer-generated holography (CGH) and the complex amplitude CGH. The results quantitatively show that the pixel shape of the modulation devices will affect the quality of the holographic image.
Advanced Materials Research, 2013
High performance silicalite-1 membranes were successfully synthesized on silica tubes by seeding ... more High performance silicalite-1 membranes were successfully synthesized on silica tubes by seeding method after filling the tubes with water and glycerol mixtures. After seeding the silica tubes with 200 nm seeds, all the silicalite-1 membranes show acceptable separation performance towards ethanol/water mixture after 4-12 h hydrothermal synthesis, and the highest flux of membrane with 8 h hydrothermal synthesis reaches about 0.98 kg/m2.h and the separation factor reaches about 60 towards 3 wt.% ethanol/water mixture. This result shows that the as-synthesized silicalite-1 membrane can concentrate the ethanol from 3% to about 65%, and the ethanol can be obtained over 600 g/m2.h by using the silicalite-1 membrane, which shows that seeding method and suitable control of synthesis conditions is possible for preparing high-performance silicalite-1 membranes.
Advanced Materials Research, 2012
Silicalite-1 membranes were successfully synthesized on α-Al2O3 tubes by in-situ hydrothermal syn... more Silicalite-1 membranes were successfully synthesized on α-Al2O3 tubes by in-situ hydrothermal synthesis after filling the tubes with water and glycerol mixtures, and all the membranes show high concentration performance towards ethanol/water mixtures after pretreating tubes with different NaOH solution. The results show that the flux enhances with the enhancement of NaOH solution concentration, but the separation selectivity decreases with the enhancement of NaOH solution concentration. After pretreating the α-Al2O3 tubes with different NaOH solution, the weight of all the α-Al2O3 tube decreases, but the Si/Al ratio increases, which shows that suitable pretreatment of α-Al2O3 is useful for improving the hydrophobicity of silicalite-1 membranes.
2006 Semantics, Knowledge and Grid, Second International Conference on, 2006
The efficacy of pattern-based question answering system is mostly determined by the size of the s... more The efficacy of pattern-based question answering system is mostly determined by the size of the semantic pattern base and the expression capability of the semantic patterns. We find that the expression capabilities of semantic patterns are determined by their instantiation degrees. Hence, we propose an evaluation strategy named Semantic Identifiability Inverse Pattern Universality (SIIPU), using which we can estimate the
Advanced Materials Research, 2014
Based on the structure, the hydraulic scissor lift platform can be divided into different compone... more Based on the structure, the hydraulic scissor lift platform can be divided into different component modules. The maximum lifting force is calculated in accordance with its structure features, and then the safty is analyzed.
Journal of the chemical society of pakistan, 2019
A new method of quantifying the contents of riboflavin (RF) and pyridoxine (PY) in their mixed so... more A new method of quantifying the contents of riboflavin (RF) and pyridoxine (PY) in their mixed solution was introduced in this study. A mathematical model was established to calculate the actual concentration of PY (Z) based on the apparent concentrations of PY (Y) and RF (X), which were quantified directly when RF and PY were mixed together. First, a linear relationship was found between Y and Z with a high coefficient, which defines fluorescence quenching efficiency. Second, a curvilinear equation was established between the apparent concentration of X and the fluorescence quenching efficiency (k) of PY. The actual concentration of PY could be obtained by using the two equations. The established mathematical model was verified, and the relative error of the calculated PY value was below 2.5%. The upper limit of fluorescence spectrophotometry quantification was up to 20 μg/mL for both RF and PY. Compared with RP-HPLC, this method is convenient in terms of sample pretreatment, as we...
Journal of the chemical society of pakistan, 2021
The first mesoporous silica nanoparticles (MSNs) supported atomically precise palladium nanoclust... more The first mesoporous silica nanoparticles (MSNs) supported atomically precise palladium nanoclusters catalyzed alcohol oxidation reactions in water have been achieved. The catalysts was synthesized with simple impregnation method and well characterized by TEM, FT-IR, XPS anddiffuse reflectance optical spectrum and the results proved that the Pd nanoclustersimmobilized into the pores of MSNs.The as-prepared catalyst show excellent activity for the alcohol oxidation reactions with high yield under extremely mild aqueous conditions utilizes 1 atmosphere of molecular oxygen as sole oxidant. The features of clean system, gram-scale oxidation and easy recovery catalyst make this method cost effectively and environmentally benign.
Chinese Optics Letters, 2017
We propose and experimentally demonstrate an adaptive multiple-input multiple-output (MIMO) mode ... more We propose and experimentally demonstrate an adaptive multiple-input multiple-output (MIMO) mode switching scheme for an indoor visible light communication system combined with orthogonal frequency division multiplexing modulation. Only requiring 1 bit feedback from the receiver, the MIMO mode at the transmitter switches between spatial multiplexing and transmit diversity adapting to the channel correlation. In such a way, we can take advantage of both spatial multiplexing and transmit diversity, where the spatial multiplexing benefits for its multiplexing gain in the low channel correlation environment, and the transmit diversity is robust to high channel correlation. Experimental results validate the performance improvement over the pure spatial multiplexing or transmit diversity system. With the increasing of the channel correlation, the measured bit error rates of the proposed system are below the 7% pre-forward error correction (pre-FEC) limit of 3.8 × 10 −3 when the transmitted data rate is 50 Mb/s, and below the 20% pre-FEC threshold of 5.0 × 10 −2 when the transmitted data rate is raised up to 100 Mb/s. OCIS codes: 060.2605, 060.4080.
Chinese Optics Letters, 2017
In order to improve the frequency and precision of radiometric calibration, the automated vicario... more In order to improve the frequency and precision of radiometric calibration, the automated vicarious calibration system (AVCS) is developed and deployed at the Dunhuang test site to perform vicarious calibration without the in situ manned measurements. The surface and atmospheric parameters are automatically collected by AVCS. An absolute radiometric calibration approach based on AVCS is proposed. Six successful calibrations of the Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) are conducted. The results are in good agreement with the on-board calibration system with all the relative differences less than 4%. It enables us to monitor the change of a sensor over long time scales.
Chinese Optics Letters, 2016
Two different methods from graphic processing unit(GPU) and central processing unit(CPU) are prop... more Two different methods from graphic processing unit(GPU) and central processing unit(CPU) are proposed to suitably optimize look-up table algorithms of computer generated holography(CGH). The numerical simulations and experimental results show that we can reconstruct a good quality object. The computation of CGH for a three-dimensional(3D) dynamic holographic display can also be sped up by programming with our proposed method. It can optimize both file loading and the inline calculation process. The phase-only CGH with gigabyte data for reconstructing 10 MB object samplings is generated. In addition, the proposed method effectively reduced time costs of loading and writing offline tables on a CPU. It is believed the proposed method can provide high speed and huge data CGH for 3D dynamic holographic displays in the near future.
Chinese Optics Letters, 2016
We propose and experimentally demonstrate a simple visible light communication system by combinin... more We propose and experimentally demonstrate a simple visible light communication system by combining an adaptive transmission technique with orthogonal frequency division multiplexing. In the adaptive transmission scheme, power allocation is performed in such a way as to maximize the channel capacity under electric power constraints, and adaptive modulation is then introduced to achieve the maximum data rate given a target bit error rate. Experimental results show that spectrum efficiency can be greatly improved through this adaptive transmission technique.
2003 5th International Conference on ASIC Proceedings (IEEE Cat No 03TH8690) ICASIC-03, 2003
The tree-pair method is a new approach of tree enumeration for symbolic network analysis, which b... more The tree-pair method is a new approach of tree enumeration for symbolic network analysis, which based on the theorem that the determinant of a closed network is equal to the sum of all valid trees' values and all valid tree-pairs' values of the circuit's graph. Thus the key to calculate the determinant is to find the trees and tree-pairs in the graph. The algorithm and the program scheme to find out all valid trees and valid tree-pairs are presented in this paper. A simulator of symbolic analysis by the algorithm is implemented. Some examples are solved successfully and shown in the paper.
Microbial cell factories, Jan 20, 2016
Nitrogen fixation has been established in protokaryotic model Escherichia coli by transferring a ... more Nitrogen fixation has been established in protokaryotic model Escherichia coli by transferring a minimal nif gene cluster composed of 9 genes (nifB, nifH, nifD, nifK, nifE, nifN, nifX, hesA and nifV) from Paenibacillus sp. WLY78. However, the nitrogenase activity in the recombinant E. coli 78-7 is only 10 % of that observed in wild-type Paenibacillus. Thus, it is necessary to increase nitrogenase activity through synthetic biology. In order to increase nitrogenase activity in heterologous host, a total of 28 selected genes from Paenibacillus sp. WLY78 and Klebsiella oxytoca were placed under the control of Paenibacillus nif promoter in two different vectors and then they are separately or combinationally transferred to the recombinant E. coli 78-7. Our results demonstrate that Paenibacillus suf operon (Fe-S cluster assembly) and the potential electron transport genes pfoAB, fldA and fer can increase nitrogenase activity. Also, K. oxytoca nifSU (Fe-S cluster assembly) and nifFJ (elec...
Chinese Optics Letters, 2015
A surprising phenomenon can be discovered by using femtosecond double-pulse ablation of silicon a... more A surprising phenomenon can be discovered by using femtosecond double-pulse ablation of silicon and germanium in ethanol. The ablation areas present an oscillation increase phenomenon when the pulse delay increases from 200 fs to 1 ps in the fluence range of 0.5-0.6 J∕cm 2. In contrast, the ablation areas exhibit an oscillation decrease phenomenon as the pulse delay increases when the laser fluence F < 0.5 J∕cm 2 , which is consistent with the results of the experiment in air. It is considered that the adjustment of the photon-electron coupling efficiency by pulse train technology plays an important role in the ablation process.
Genes & Genomics, 2013
Myogenic enhancer transcription factor 2c (MEF2c), one of the members of the MEF2 family of trans... more Myogenic enhancer transcription factor 2c (MEF2c), one of the members of the MEF2 family of transcription factors, plays an important role in mammalian muscle development. However, the role of MEF2c in avian muscle development still remains unclear. To understand the function of MEF2c in avian muscle development, we first cloned the duck MEF2c coding domain sequence (CDS) and analyzed MEF2c expression in duck muscle tissues of embryos from 10 days of incubation to 1 week after birth using real-time PCR technology. The results showed that the duck MEF2c CDS consists of 1,398 nucleotides that encode 465 amino acids. The MEF2c duck protein contains a MADS domain, a MEF2 domain and a HJURP_C domain with high homology to related proteins in other organisms. Different expression levels of MEF2c were found in skeletal, smooth and cardiac muscle. Therefore, these results indicated that duck MEF2c has two conserved domains (a MADS and a MEF2 domain), is an indispensable regulator of muscle development, and plays an important role in the development of duck muscle.
Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology, Jan 20, 2015
To investigate the relationship between level of Th17/CD4+T cell ratio in peripheral blood and po... more To investigate the relationship between level of Th17/CD4+T cell ratio in peripheral blood and postoperative complications in patients with hepatitis B virus (HBV)-related cirrhosis after orthotopic liver transplantation (OLT). Fifty-one patients with HBV-related cirrhosis who received OLT were enrolled in this study. Flow cytometry analysis was performed to measure the proportion of Th17 cells to CD4+T cells at the following time points:pre-OLT, and post-OLT days 7, 14 and 21. The relevant hepatic biochemistry indexes, serum concentration of FK506 and level of procalcitonin (PCT) were detected for all patients after OLT. The transplant recipients were divided into four groups according to the postoperative complication, which included acute rejection (AR, n =12), postoperative infection (POI, n =10), transient intrahepatic cholestasis (TIHC, n =12) and no complications (n =17). The Th17/CD4+T cell frequencies were notably higher in the AR patients after OLT (vs. before OLT, P less ...
Chinese Optics Letters, 2014
We propose a method to improve the quality of the reconstructed images based on compressive sensi... more We propose a method to improve the quality of the reconstructed images based on compressive sensing principles. The pseudo-inverse matrix and the total variation minimization algorithms are combined to reduce the sampling number of the computer generated hologram. Numerical simulations are performed and the results indicate that the peak signal to noise ratio is increased and the sampling ratio is decreased at the same time for holographic display.
Chinese Optics Letters, 2013
This letter presents a label-free biomolecular imaging technique based on white-light interferome... more This letter presents a label-free biomolecular imaging technique based on white-light interferometry and spectral detection. The method measures thickness changes caused by specific binding between biomolecules to detect the presence of certain analyte. A spectrum-shifting algorithm is developed to resolve the thickness information from the spectrum. The axial resolution of the experimental instrument can reach ∼1 nm, thereby enabling detection of trace amounts (∼1 ng/mm 2) of proteins or DNA. This letter also presents two experiments to prove the feasibility of the method for detecting proteins and DNA without fluorescent labeling.
Advanced Materials Research, 2009
This work is focused on design and fabrication of a hybrid-type electrostatic silicon microgrippe... more This work is focused on design and fabrication of a hybrid-type electrostatic silicon microgripper integrated vacuum tool. Vacuum tools are integrated in this novel microgripper in order to improve its pick and place capability. Surface and bulk micromachining technology is employed to fabricate the microgripper from single crystal silicon wafer (i.e., no silicon on insulator wafer is used). And the bonding technology is used to form the gas pipes for the vacuum tool. The linear motion of the microactuator is converted into a rotational gripping motion by a system of spring beams. At a driving voltage of 80V, a deflection of 25μm at the arm tip of the gripper is achieved.
Oncology letters, 2013
MicroRNAs (miRNAs), present in the serum in a stable and reproducible manner, may be used as biom... more MicroRNAs (miRNAs), present in the serum in a stable and reproducible manner, may be used as biomarkers for various diseases. Few studies have previously investigated circulating miRNAs in the peripheral blood of breast cancer (BC) patients. To identify the role of serum miR-182 levels in BC, the present study detected miR-182 levels in the serum of 46 BC patients and 58 controls, by quantitative PCR. The results showed that the serum miR-182 levels in BC patients were significantly higher compared with the serum of healthy controls (P<0.01). The miR-182 was also overexpressed in the BC tissues compared with the para-carcinoma tissues. Furthermore, the serum levels of miR-182 in the estrogen receptor (ER)-positive patients were considerably lower compared with those in the ER-negative patients. The serum levels of miR-182 in the progesterone receptor (PR)-positive patients were also found to be lower compared with those in the PR-negative patients. The current study highlights re...
Chinese Optics Letters, 2015
With the development of the micro/nanolithography, the optic-optic or optic-electronic modulation... more With the development of the micro/nanolithography, the optic-optic or optic-electronic modulation devices with different pixel shapes and sizes can be used for three-dimensional (3D) dynamical holographic display. The influence of different parameters of the modulation devices on the image quality of the 3D reconstructed object is analyzed for two cases: the phase-only computer-generated holography (CGH) and the complex amplitude CGH. The results quantitatively show that the pixel shape of the modulation devices will affect the quality of the holographic image.
Advanced Materials Research, 2013
High performance silicalite-1 membranes were successfully synthesized on silica tubes by seeding ... more High performance silicalite-1 membranes were successfully synthesized on silica tubes by seeding method after filling the tubes with water and glycerol mixtures. After seeding the silica tubes with 200 nm seeds, all the silicalite-1 membranes show acceptable separation performance towards ethanol/water mixture after 4-12 h hydrothermal synthesis, and the highest flux of membrane with 8 h hydrothermal synthesis reaches about 0.98 kg/m2.h and the separation factor reaches about 60 towards 3 wt.% ethanol/water mixture. This result shows that the as-synthesized silicalite-1 membrane can concentrate the ethanol from 3% to about 65%, and the ethanol can be obtained over 600 g/m2.h by using the silicalite-1 membrane, which shows that seeding method and suitable control of synthesis conditions is possible for preparing high-performance silicalite-1 membranes.
Advanced Materials Research, 2012
Silicalite-1 membranes were successfully synthesized on α-Al2O3 tubes by in-situ hydrothermal syn... more Silicalite-1 membranes were successfully synthesized on α-Al2O3 tubes by in-situ hydrothermal synthesis after filling the tubes with water and glycerol mixtures, and all the membranes show high concentration performance towards ethanol/water mixtures after pretreating tubes with different NaOH solution. The results show that the flux enhances with the enhancement of NaOH solution concentration, but the separation selectivity decreases with the enhancement of NaOH solution concentration. After pretreating the α-Al2O3 tubes with different NaOH solution, the weight of all the α-Al2O3 tube decreases, but the Si/Al ratio increases, which shows that suitable pretreatment of α-Al2O3 is useful for improving the hydrophobicity of silicalite-1 membranes.
2006 Semantics, Knowledge and Grid, Second International Conference on, 2006
The efficacy of pattern-based question answering system is mostly determined by the size of the s... more The efficacy of pattern-based question answering system is mostly determined by the size of the semantic pattern base and the expression capability of the semantic patterns. We find that the expression capabilities of semantic patterns are determined by their instantiation degrees. Hence, we propose an evaluation strategy named Semantic Identifiability Inverse Pattern Universality (SIIPU), using which we can estimate the
Advanced Materials Research, 2014
Based on the structure, the hydraulic scissor lift platform can be divided into different compone... more Based on the structure, the hydraulic scissor lift platform can be divided into different component modules. The maximum lifting force is calculated in accordance with its structure features, and then the safty is analyzed.