Allelopathic effects of submerged macrophytes against algae are affected by many environmental factors which can only be measured one by one by traditional methods. Box-Behnken design of response surface methodology w...Allelopathic effects of submerged macrophytes against algae are affected by many environmental factors which can only be measured one by one by traditional methods. Box-Behnken design of response surface methodology was used to optimize three environmental factors （temperature, light intensity and total dissolved solids） of allelopathic effects of Potarnogeton pectinatus against Microcystis aeruginosa at the same time. By solving the regression equation and analyzing the response surface contour plots, the optimal conditions of the relatively inhibitory rate of Microcystis aeruginosa were that the temperature was 23℃, the light intensity was 2 700 lx and the total dissolved solids were 4 415 mg/L. Under these conditions, the optimal value of relatively inhibitory rate of Microcystis aeruginosa was 81.9%. According to validation experiments, the results of analysis indicated that the experimental values fitted well with the predicted ones.展开更多
A single Complementary Metal Oxide Semiconductor (CMOS) image sensor based on 0.35μm process along with its design and implementation is introduced in this paper. The pixel ar-chitecture of Active Pixel Sensor (APS) ...A single Complementary Metal Oxide Semiconductor (CMOS) image sensor based on 0.35μm process along with its design and implementation is introduced in this paper. The pixel ar-chitecture of Active Pixel Sensor (APS) is used in the chip,which comprises a 256×256 pixel array together with column amplifiers,scan array circuits,series interface,control logic and Analog-Digital Converter (ADC). With the use of smart layout design,fill factor of pixel cell is 43%. Moreover,a new method of Dynamic Digital Double Sample (DDDS) which removes Fixed Pattern Noise (FPN) is used. The CMOS image sensor chip is implemented based on the 0.35μm process of chartered by Multi-Project Wafer (MPW). This chip performs well as expected.展开更多
DD （Dust deposition） was monitored over a 6-month period （April to September, 2011） at four sites located in villages near CADDⅡ（coal ash disposal site Divkovici Ⅱ）, one inside recultivated CADDⅠ （coal ash d...DD （Dust deposition） was monitored over a 6-month period （April to September, 2011） at four sites located in villages near CADDⅡ（coal ash disposal site Divkovici Ⅱ）, one inside recultivated CADDⅠ （coal ash disposal site Divkovici Ⅰ） and at one in the middle of forest barrier as control site. The main aim of this paper is to perform monitoring of air dust pollution in the area by measuring of dust deposition, different metals associated with it, and probable adverse effects on human health. Concentrations of metals were measured by using Perkin-Elmer model Inductively Coupled Plasma and statistically evaluated with SPSS 17.0 statistical program. There was a correlation between some metals （Mn, Mo and Pb） and DD distribution. The daily limit values for concentration of DD proposed by national ＂Regulations on air quality＂ （200 mg/m^2d average annual value and 350 mg/m^2d high value） exceed at three measuring sites. The average maximum content of DD was 684.8 mg/m^2d downwind of CADDII, and the average minimum was 46.8 mg/m^2d at measuring site F. Concentrations of pollutants hazardous to the environment as Ni, Cr, Cu, Mo, Mn and Pb vary from one site to another.展开更多
Equations that can predict worsted fabrics’ properties such as bending, shearing, compression, surface and tension, were achieved by means of theoretical and experimental studies. By combining these equations with Ka...Equations that can predict worsted fabrics’ properties such as bending, shearing, compression, surface and tension, were achieved by means of theoretical and experimental studies. By combining these equations with Kawabata’s hand and silhouette evaluation methods, a software system was established. Then the mechanical properties, hand and silhouette of a fabric can be predicted quickly and accurately in terms of fiber configurations, yarn and fabric structures. The predictive result if unsatisfied can be revised by the function of “Help for designing modification”.展开更多
Objective： The aim of the research was to investigate efficacy of dried bio-floc supplemented with immuno-stimulants as beta-glucan and nucleotide on mortality rate and relative percent survival （RPS） of tilapia in...Objective： The aim of the research was to investigate efficacy of dried bio-floc supplemented with immuno-stimulants as beta-glucan and nucleotide on mortality rate and relative percent survival （RPS） of tilapia infected with Flavobacterium columnare, VETSV01. Materials and Methods： A research was performed in 1-inch long tilapia stimulated its immunity by infection with Flavobacterium columnare, VETSV01. Pathogenesis of 0.2 mL Flavobacterium columnare, VETSV01 in the range of 10^2-10^8 mL-1 fish^-1 was injected into its intraperitoneal injection and intramuscular injection and suitable concentrations were screened to obtain for further experiment in a late restage. Based on data of minimal concentration, 50% mortality rate was caused and it was found the concentration of 108 mL^-1 fish^-1 caused 100% mortality rate and no lethal rate was found in other concentrations. Afterwards, efficacy of bio-floc sediment on survival rate of Tilapia infected with Flavobacterium columnare, VETSV01 was examined. Completely randomized design was employed and experiments were divided into 4 treatment： （1） contxol-commercial feed only, （2） commercial feed attached with dried bio-floc, （3） commercial feed attached with bio-floc and beta-glucan and （4） commercial feed attached with bio-floc and nucleotide. Experiment design was performed as 3 replicates with 10 fishes/replicates in 24 inch glass aquarium. Analysis of difference was performed and determination of mean differences of mortality rate mad relative percent survival was done through Duncan＇s Multiple Range Test （p 〈 0.05）. Results and Discussions： It was demonstrated feeding tilapia with commercial feed in combination with dried bio-floc with or without supplementation of 2 immuno-stimulants could lead to 100% survival rate and 100% relative percent survival rate and it was statistically significant different （p 〈 0.05） compared to control group. Bio-floc product supplemented with beta glucan or nucleotide could effectively stimulate immunity against Flavobacterium columnare, VETSV01 and such high effective performance is viewed as a promising potential product to be further developed and practically employed for sake of aquaculture industry in the near future.展开更多
This paper presents a discussion of the characters and design patterns of the digital texture design in fashion fabrics. It starts from the characters of fabric texture design, taking digital printing technology as a ...This paper presents a discussion of the characters and design patterns of the digital texture design in fashion fabrics. It starts from the characters of fabric texture design, taking digital printing technology as a detailed example, and raises a possible design route and pattern of the innovative design of fashion fabrics under digital technology.展开更多
We proposed a lower extremity exoskeleton for power amplification that perceives intended human motion via humanexoskeleton interaction signals measured by biomedical or mechanical sensors, and estimates human gait tr...We proposed a lower extremity exoskeleton for power amplification that perceives intended human motion via humanexoskeleton interaction signals measured by biomedical or mechanical sensors, and estimates human gait trajectories to implement corresponding actions quickly and accurately. In this study, torque sensors mounted on the exoskeleton links are proposed for obtaining physical human-robot interaction（pHRI） torque information directly. A Kalman smoother is adopted for eliminating noise and smoothing the signal data. Simultaneously, the mapping from the pHRI torque to the human gait trajectory is defined. The mapping is derived from the real-time state of the robotic exoskeleton during movement. The walking phase is identified by the threshold approach using ground reaction force. Based on phase identification, the human gait can be estimated by applying the proposed algorithm, and then the gait is regarded as the reference input for the controller. A proportional-integral-derivative control strategy is constructed to drive the robotic exoskeleton to follow the human gait trajectory. Experiments were performed on a human subject who walked on the floor at a natural speed wearing the robotic exoskeleton. Experimental results show the effectiveness of the proposed strategy.展开更多
基金Supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China(No.2012BAC13B05)Science and Technology Foundation of Beijing Municipal Research Institute of Environmental Protection(No.2013B05)
文摘Allelopathic effects of submerged macrophytes against algae are affected by many environmental factors which can only be measured one by one by traditional methods. Box-Behnken design of response surface methodology was used to optimize three environmental factors （temperature, light intensity and total dissolved solids） of allelopathic effects of Potarnogeton pectinatus against Microcystis aeruginosa at the same time. By solving the regression equation and analyzing the response surface contour plots, the optimal conditions of the relatively inhibitory rate of Microcystis aeruginosa were that the temperature was 23℃, the light intensity was 2 700 lx and the total dissolved solids were 4 415 mg/L. Under these conditions, the optimal value of relatively inhibitory rate of Microcystis aeruginosa was 81.9%. According to validation experiments, the results of analysis indicated that the experimental values fitted well with the predicted ones.
文摘A single Complementary Metal Oxide Semiconductor (CMOS) image sensor based on 0.35μm process along with its design and implementation is introduced in this paper. The pixel ar-chitecture of Active Pixel Sensor (APS) is used in the chip,which comprises a 256×256 pixel array together with column amplifiers,scan array circuits,series interface,control logic and Analog-Digital Converter (ADC). With the use of smart layout design,fill factor of pixel cell is 43%. Moreover,a new method of Dynamic Digital Double Sample (DDDS) which removes Fixed Pattern Noise (FPN) is used. The CMOS image sensor chip is implemented based on the 0.35μm process of chartered by Multi-Project Wafer (MPW). This chip performs well as expected.
文摘DD （Dust deposition） was monitored over a 6-month period （April to September, 2011） at four sites located in villages near CADDⅡ（coal ash disposal site Divkovici Ⅱ）, one inside recultivated CADDⅠ （coal ash disposal site Divkovici Ⅰ） and at one in the middle of forest barrier as control site. The main aim of this paper is to perform monitoring of air dust pollution in the area by measuring of dust deposition, different metals associated with it, and probable adverse effects on human health. Concentrations of metals were measured by using Perkin-Elmer model Inductively Coupled Plasma and statistically evaluated with SPSS 17.0 statistical program. There was a correlation between some metals （Mn, Mo and Pb） and DD distribution. The daily limit values for concentration of DD proposed by national ＂Regulations on air quality＂ （200 mg/m^2d average annual value and 350 mg/m^2d high value） exceed at three measuring sites. The average maximum content of DD was 684.8 mg/m^2d downwind of CADDII, and the average minimum was 46.8 mg/m^2d at measuring site F. Concentrations of pollutants hazardous to the environment as Ni, Cr, Cu, Mo, Mn and Pb vary from one site to another.
文摘Equations that can predict worsted fabrics’ properties such as bending, shearing, compression, surface and tension, were achieved by means of theoretical and experimental studies. By combining these equations with Kawabata’s hand and silhouette evaluation methods, a software system was established. Then the mechanical properties, hand and silhouette of a fabric can be predicted quickly and accurately in terms of fiber configurations, yarn and fabric structures. The predictive result if unsatisfied can be revised by the function of “Help for designing modification”.
文摘Objective： The aim of the research was to investigate efficacy of dried bio-floc supplemented with immuno-stimulants as beta-glucan and nucleotide on mortality rate and relative percent survival （RPS） of tilapia infected with Flavobacterium columnare, VETSV01. Materials and Methods： A research was performed in 1-inch long tilapia stimulated its immunity by infection with Flavobacterium columnare, VETSV01. Pathogenesis of 0.2 mL Flavobacterium columnare, VETSV01 in the range of 10^2-10^8 mL-1 fish^-1 was injected into its intraperitoneal injection and intramuscular injection and suitable concentrations were screened to obtain for further experiment in a late restage. Based on data of minimal concentration, 50% mortality rate was caused and it was found the concentration of 108 mL^-1 fish^-1 caused 100% mortality rate and no lethal rate was found in other concentrations. Afterwards, efficacy of bio-floc sediment on survival rate of Tilapia infected with Flavobacterium columnare, VETSV01 was examined. Completely randomized design was employed and experiments were divided into 4 treatment： （1） contxol-commercial feed only, （2） commercial feed attached with dried bio-floc, （3） commercial feed attached with bio-floc and beta-glucan and （4） commercial feed attached with bio-floc and nucleotide. Experiment design was performed as 3 replicates with 10 fishes/replicates in 24 inch glass aquarium. Analysis of difference was performed and determination of mean differences of mortality rate mad relative percent survival was done through Duncan＇s Multiple Range Test （p 〈 0.05）. Results and Discussions： It was demonstrated feeding tilapia with commercial feed in combination with dried bio-floc with or without supplementation of 2 immuno-stimulants could lead to 100% survival rate and 100% relative percent survival rate and it was statistically significant different （p 〈 0.05） compared to control group. Bio-floc product supplemented with beta glucan or nucleotide could effectively stimulate immunity against Flavobacterium columnare, VETSV01 and such high effective performance is viewed as a promising potential product to be further developed and practically employed for sake of aquaculture industry in the near future.
文摘This paper presents a discussion of the characters and design patterns of the digital texture design in fashion fabrics. It starts from the characters of fabric texture design, taking digital printing technology as a detailed example, and raises a possible design route and pattern of the innovative design of fashion fabrics under digital technology.
文摘We proposed a lower extremity exoskeleton for power amplification that perceives intended human motion via humanexoskeleton interaction signals measured by biomedical or mechanical sensors, and estimates human gait trajectories to implement corresponding actions quickly and accurately. In this study, torque sensors mounted on the exoskeleton links are proposed for obtaining physical human-robot interaction（pHRI） torque information directly. A Kalman smoother is adopted for eliminating noise and smoothing the signal data. Simultaneously, the mapping from the pHRI torque to the human gait trajectory is defined. The mapping is derived from the real-time state of the robotic exoskeleton during movement. The walking phase is identified by the threshold approach using ground reaction force. Based on phase identification, the human gait can be estimated by applying the proposed algorithm, and then the gait is regarded as the reference input for the controller. A proportional-integral-derivative control strategy is constructed to drive the robotic exoskeleton to follow the human gait trajectory. Experiments were performed on a human subject who walked on the floor at a natural speed wearing the robotic exoskeleton. Experimental results show the effectiveness of the proposed strategy.
