Suspended sediment concentration(SSC) is an important parameter in marine sedimentology. With the development of technology, many acoustic and optical devices, such as the Laser In-Situ Scattering and Transmissometry,...Suspended sediment concentration(SSC) is an important parameter in marine sedimentology. With the development of technology, many acoustic and optical devices, such as the Laser In-Situ Scattering and Transmissometry, have been designed to measure in situ SSC and grain size distribution. But due to fund or other restrictions, many experiments were only conducted in laboratory, using an indoor laser grain-size analyzer and gravimetric method to measure grain size distribution and concentration, respectively. In this study the laboratory experiment is simplified by omitting the tiring step of gravimetric method. The connections between SSC and other parameters(obscuration, D50 and sorting index) were investigated based on 124 surface sediment samples collected from different offshore areas. A new method is developed for determining SSC in laboratory using a laser grain-size analyzer.展开更多
The novel fan-shaped self-scanning photodiode array (SSPA) has the advantages of the high sensitivity with small device size and the serial video output mode. Using novel SSPA instead of the photodiode array of a semi...The novel fan-shaped self-scanning photodiode array (SSPA) has the advantages of the high sensitivity with small device size and the serial video output mode. Using novel SSPA instead of the photodiode array of a semicircular annular detectors in the laser diffraction particle size analyzer, these correctness of the results are verified by various particle samples measuring and the practical running over ten thousand hours in the desulphuration tower.展开更多
A novel portable analyzer for raw milk quality control during the material purchase at dairy plants was developed, by which the percentages（mass fraction） of main components including total protein, fat, and lactose...A novel portable analyzer for raw milk quality control during the material purchase at dairy plants was developed, by which the percentages（mass fraction） of main components including total protein, fat, and lactose of an unhomogenized milk sample could be determinated in 1 min with the help of non-dispersive short-wave near-infrared （NDSWNIR） spectrometry in a wavelength range from 600 nm to 1100 nm and multivariate calibration. The analyzer was designed with a single-beam optical system, which comprised a temperature control module, a multi-channel narrow-band light source（16 wavelengths）, a glass absorption cell with 15 mm sample thickness, a silicon photodiode detector, several compound lenses and a recorder module. A total of 80 raw milk samples were collected at a dairy farm twice a month for 4 months. The samples were scanned with a common UV-Vis-NIR spectrometer and analyzed according to China GB standard methods. The uninformative variables elimination（UVE） method was carried out on the spectrum data and the percentages of main components of all the samples to choose the peak emitting wavelength of each channel of the light source. Another 90 raw milk samples were collected from the same dairy farm thrice a month for 3 months. The samples were analyzed according to China GB standard methods and with the proposed analyzer. The percentages of the main components and the NDSWNIR absorption data of the samples were used for the construction and validation of the multivariate calibration model with partial least squares（PLS） method. The root-mean-square errors of prediction（RMSEP） of total protein, fat and lactose were 0.201, 0.172 and 0.247 and the coefficients of correlation（R） were 0.932, 0.981 and 0.933, respectively.展开更多
陶土矿是制作紫砂工艺品的原料。目前,行业内用来判别陶土矿质量的常规方法主要是主量元素含量、矿物组成与可塑性、烧失量、收缩率和吸水率等性能的分析与测试。常规分析测试方法虽然对判别陶土矿质量有较好的效果,但是对于粉砂质泥岩...陶土矿是制作紫砂工艺品的原料。目前,行业内用来判别陶土矿质量的常规方法主要是主量元素含量、矿物组成与可塑性、烧失量、收缩率和吸水率等性能的分析与测试。常规分析测试方法虽然对判别陶土矿质量有较好的效果,但是对于粉砂质泥岩和泥质粉砂岩这两类对陶土矿质量影响较大的岩石,在化学成分上却难以区分。笔者在开展宜兴陶土矿资源调查时,采用综合矿物分析系统(Tescan Integrated Mineral Ana-lyzer,TIMA)对从岩心中选取的矿料和当地优质矿料的矿物成分、含量及其粒度分布等进行了测试分析和对比,研究发现:优质陶土矿中黏土矿物的含量占比在30%以上,矿物的粒度区间极窄,基本为泥级;石英的粒度区间较宽,基本为泥级、粉级和细砂级,且不同粒级的石英分布较均匀,石英含量趋势线平稳或向粗粒级方向收缩。因此,认为矿物的成分、含量及其粒度分布是影响陶土矿质量的重要因素。通过TIMA测试不仅可以弥补利用化学成分难以判别矿与非矿的不足,还可以有效地判别矿石质量与产品质量之间的内在关系。展开更多
基金sponsored by Marine Commonweal Scientific Research Foundation (201005009)
文摘Suspended sediment concentration(SSC) is an important parameter in marine sedimentology. With the development of technology, many acoustic and optical devices, such as the Laser In-Situ Scattering and Transmissometry, have been designed to measure in situ SSC and grain size distribution. But due to fund or other restrictions, many experiments were only conducted in laboratory, using an indoor laser grain-size analyzer and gravimetric method to measure grain size distribution and concentration, respectively. In this study the laboratory experiment is simplified by omitting the tiring step of gravimetric method. The connections between SSC and other parameters(obscuration, D50 and sorting index) were investigated based on 124 surface sediment samples collected from different offshore areas. A new method is developed for determining SSC in laboratory using a laser grain-size analyzer.
文摘The novel fan-shaped self-scanning photodiode array (SSPA) has the advantages of the high sensitivity with small device size and the serial video output mode. Using novel SSPA instead of the photodiode array of a semicircular annular detectors in the laser diffraction particle size analyzer, these correctness of the results are verified by various particle samples measuring and the practical running over ten thousand hours in the desulphuration tower.
文摘A novel portable analyzer for raw milk quality control during the material purchase at dairy plants was developed, by which the percentages（mass fraction） of main components including total protein, fat, and lactose of an unhomogenized milk sample could be determinated in 1 min with the help of non-dispersive short-wave near-infrared （NDSWNIR） spectrometry in a wavelength range from 600 nm to 1100 nm and multivariate calibration. The analyzer was designed with a single-beam optical system, which comprised a temperature control module, a multi-channel narrow-band light source（16 wavelengths）, a glass absorption cell with 15 mm sample thickness, a silicon photodiode detector, several compound lenses and a recorder module. A total of 80 raw milk samples were collected at a dairy farm twice a month for 4 months. The samples were scanned with a common UV-Vis-NIR spectrometer and analyzed according to China GB standard methods. The uninformative variables elimination（UVE） method was carried out on the spectrum data and the percentages of main components of all the samples to choose the peak emitting wavelength of each channel of the light source. Another 90 raw milk samples were collected from the same dairy farm thrice a month for 3 months. The samples were analyzed according to China GB standard methods and with the proposed analyzer. The percentages of the main components and the NDSWNIR absorption data of the samples were used for the construction and validation of the multivariate calibration model with partial least squares（PLS） method. The root-mean-square errors of prediction（RMSEP） of total protein, fat and lactose were 0.201, 0.172 and 0.247 and the coefficients of correlation（R） were 0.932, 0.981 and 0.933, respectively.
文摘陶土矿是制作紫砂工艺品的原料。目前,行业内用来判别陶土矿质量的常规方法主要是主量元素含量、矿物组成与可塑性、烧失量、收缩率和吸水率等性能的分析与测试。常规分析测试方法虽然对判别陶土矿质量有较好的效果,但是对于粉砂质泥岩和泥质粉砂岩这两类对陶土矿质量影响较大的岩石,在化学成分上却难以区分。笔者在开展宜兴陶土矿资源调查时,采用综合矿物分析系统(Tescan Integrated Mineral Ana-lyzer,TIMA)对从岩心中选取的矿料和当地优质矿料的矿物成分、含量及其粒度分布等进行了测试分析和对比,研究发现:优质陶土矿中黏土矿物的含量占比在30%以上,矿物的粒度区间极窄,基本为泥级;石英的粒度区间较宽,基本为泥级、粉级和细砂级,且不同粒级的石英分布较均匀,石英含量趋势线平稳或向粗粒级方向收缩。因此,认为矿物的成分、含量及其粒度分布是影响陶土矿质量的重要因素。通过TIMA测试不仅可以弥补利用化学成分难以判别矿与非矿的不足,还可以有效地判别矿石质量与产品质量之间的内在关系。
