A method of measuring the vortex beam topological charge(TC)is proposed based on a device that can directly extract the plane wave form from the vortex beam in which the different propagation angles of the plane waves...A method of measuring the vortex beam topological charge(TC)is proposed based on a device that can directly extract the plane wave form from the vortex beam in which the different propagation angles of the plane waves are uniquely related to the different TCs.Then the TC can be obtained by simply comparing the energy values perceived by two fixed sensors in the detection location with the help of twin omnidirectional energy absorbers(OEAs).Because the settled detection relies only on the simple quantitative value at two fixed positions,neither pattern recognition nor field analysis procedure is applied,thus allowing faster measurement.Some features of the methodology are investigated,and the numerical simulations verify the feasibility and robustness of the system.展开更多
Fourteen samples of settled dust from two factories processing rice and wheat straw near Shanghai.China, were examined by dilution plating for total bacteria, gram-negative bacteria, thermophilic actinomycetes, and fu...Fourteen samples of settled dust from two factories processing rice and wheat straw near Shanghai.China, were examined by dilution plating for total bacteria, gram-negative bacteria, thermophilic actinomycetes, and fungi.They were also examined for atlatoxin endotoxin, and potential to stimulate production of human interleukin 1β (IL-1β) and to consume complement.The concentrations of total microorganisms were consistently greater than 10~7 CFU/g and ranged from 10~7 to 10~9 CFU/g.In general, the level of microbial contamination was greater in the hay dust samples than in the rice dust samples, with bacteria being the most numerous microorganisms observed followed by molds, thermophilic actinomycetes, and yeasts.The predominant fungi were species of Aspergillus, Cladosporium, Penicillium.Trichosporon, and Cryplococcus.No significant levels of aflatoxin were observed and the isolates of A.flavus examined lack significant aflatoxigenic potential.The levels of microorganisms in these samples, the types of organisms found, and the inflammatory mediators such as endotoxin suggest that workers exposed to these dusts may be at risk for respiratory illness. 1990 Academic Press.Inc.展开更多
Asthma and allergies are considered by many physicians as being triggered by different substances in the air that people breathe. The lung is the most common site of injury by airborne pollutants. Acute effects, howev...Asthma and allergies are considered by many physicians as being triggered by different substances in the air that people breathe. The lung is the most common site of injury by airborne pollutants. Acute effects, however, may also include non-respiratory signs and symptoms, which may depend upon toxicological characteristics of the substances and host-related factors. The studying of indoor air quality can provide a method for appropriate remedial action. Research suggests that SHD （Settled House Dust） may be a significant source for indoor exposure to different substances. This research study consisted of sampling dust from homes in different area codes. The dust samples were collected from August 2006 thru March 2007 and analyzed using GC/MS （Gas Chromatography/Mass Spectrometry）. The purpose of this research study will display how sampling household dust is a powerful tool for identifying chemicals that contribute to poor indoor air quality.展开更多
China,the big factory offering various commodities to companies and individuals all over the world,is attracting more and more merchants purchasing goods in various ways,through agents,on site,via modern communication...China,the big factory offering various commodities to companies and individuals all over the world,is attracting more and more merchants purchasing goods in various ways,through agents,on site,via modern communication,etc.One essential concern of these merchants is the quality of these commodities.How can the commodity quality be ensured?If there are展开更多
In spring this year,the writershad an interview at JiangsuSuntory Ltd,a Sino-Japanesejoint venture modern foodstuffenterprise founded 11 yearsago with a joint investment ofUS＄25 million,producingmainly Prince Brand b...In spring this year,the writershad an interview at JiangsuSuntory Ltd,a Sino-Japanesejoint venture modern foodstuffenterprise founded 11 yearsago with a joint investment ofUS＄25 million,producingmainly Prince Brand beer andmalt as well as other serialproducts.展开更多
Indoor settled harmattan dusts at seven sampling stations from the University of Agriculture Makurdi were collected between November, 2014 to March, 2015 (five months) using the wipe sampling methodology. Gravimetric ...Indoor settled harmattan dusts at seven sampling stations from the University of Agriculture Makurdi were collected between November, 2014 to March, 2015 (five months) using the wipe sampling methodology. Gravimetric measurement of the dust samples from all the sample locations revealed that dust loading within the institution during the period of assessment ranges from 4.475 - 6.533 g/m2. Masses of indoor settled dust were expectedly higher along high traffic, untarred roads and construction sites as well as in older buildings than others during the period of this study. AAS analysis of the dust samples shows that heavy metal concentrations (mg/kg dry weight) throughout the sampling stations during the period of investigation range from 0.2372 - 0.7152 for Cu, 293.6 - 884.9 for Fe, 4.265 - 68.55 for Mn and 4.239 - 42.53 for Zn. The concentrations of all the metals investigated were found to be lower when compared with related values in literature and were within acceptable limits during the period of this study. Pearson correlation matrix also shows positive correlation between the possible metal pairs at 95% level of confidence, indicating a similar source which may be from anthropogenic activities within and outside the area.展开更多
In the article,the patients who still had some symptoms after the pacemakershad been settled were reviewed.There were nine cases in which serious clinicalsymptoms existed.The main symptoms were thoracodepression,palpi...In the article,the patients who still had some symptoms after the pacemakershad been settled were reviewed.There were nine cases in which serious clinicalsymptoms existed.The main symptoms were thoracodepression,palpitation,dizzinessand pant,twitch and syncope occurred for serious patients.Six cases were found totake their sources at heart by measuring blood pressure,monitoring and recordingelectrocardiogram,detecting irritability and the threshold limit value of pacemaking,thoracic X-ray checking and Holter etc.In one case after a VVI pacemaker had展开更多
The second round of the annual master's program examinations are underway through May at Chinese universities nationwide.Families are optimistic that their graduate school hopefuls will be wenle(meaning"secur...The second round of the annual master's program examinations are underway through May at Chinese universities nationwide.Families are optimistic that their graduate school hopefuls will be wenle(meaning"secured")after the examinations.展开更多
This paper presents a 16-bit,18-MSPS(million samples per second)flash-assisted successive-approximation-register(SAR)analog-to-digital converter(ADC)utilizing hybrid synchronous and asynchronous(HYSAS)timing control l...This paper presents a 16-bit,18-MSPS(million samples per second)flash-assisted successive-approximation-register(SAR)analog-to-digital converter(ADC)utilizing hybrid synchronous and asynchronous(HYSAS)timing control logic based on an on-chip delay-locked loop(DLL).The HYSAS scheme can provide a longer settling time for the capacitive digital-to-analog converter(CDAC)than the synchronous and asynchronous SAR ADC.Therefore,the issue of incomplete settling or ringing in the DAC voltage for cases of either on-chip or off-chip reference voltage can be solved to a large extent.In addition,the fore-ground calibration of the CDAC’s mismatch is performed with a finite-impulse-response bandpass filter(FIR-BPF)based least-mean-square(LMS)algorithm in an off-chip FPGA(field programmable gate array).Fabricated in 40-nm CMOS process,the proto-type ADC achieves 94.02-dB spurious-free dynamic range(SFDR),and 75.98-dB signal-to-noise-and-distortion ratio(SNDR)for a 2.88-MHz input under 18-MSPS sampling rate.展开更多
The transformation of Yundang Lake from a stinky lake to an urban reception hall has made it a showcase of ecologival restoration in China.BEFORE settling down in the City of Xiamen,Scott Patrick and his wife spent lo...The transformation of Yundang Lake from a stinky lake to an urban reception hall has made it a showcase of ecologival restoration in China.BEFORE settling down in the City of Xiamen,Scott Patrick and his wife spent long hours searching online for just the right part of the city.When they saw Yundang Lake in west Xiamen,the couple knew they had hit the jackpot.“The picture of the beautiful lake circled by lush vegetation caught our attention.We knew this was the place we were looking for,”said Patrick.Later,after setting foot in Xiamen,he told himself he had definitely made the right life decision.展开更多
What makes an ideal life?For many,it’s escaping crowded and expensive big cities and the accompanying long,exhausting commutes to settle in a beautiful,warm,and budget-friendly city,or hitting the road and going else...What makes an ideal life?For many,it’s escaping crowded and expensive big cities and the accompanying long,exhausting commutes to settle in a beautiful,warm,and budget-friendly city,or hitting the road and going elsewhere anytime you want.No alarm clocks,no punching in for work,no pressure from bosses-do a little work and then enjoy your life.This is the life for many digital nomads.展开更多
Before settling down in the city of Xiamen,Scott Patrick and his wife spent long hours searching online for just the right part of the city.When they saw Yundang Lake in west Xiamen,the couple knew they had hit the ja...Before settling down in the city of Xiamen,Scott Patrick and his wife spent long hours searching online for just the right part of the city.When they saw Yundang Lake in west Xiamen,the couple knew they had hit the jackpot.“The picture of the beautiful lake circled by lush vegetation caught our attention.We knew this was the place we were looking for,”said Patrick.Later,after setting foot in Xiamen,he told himself he had definitely made the right life decision.展开更多
Quilt Arts of South Africa Edited by MARSHA MACDOWELL Indiana University Press In the far south of the African continent,women have a long tradition of crafting bed coverings using textile techniques commonly used in ...Quilt Arts of South Africa Edited by MARSHA MACDOWELL Indiana University Press In the far south of the African continent,women have a long tradition of crafting bed coverings using textile techniques commonly used in quilting,a practice deeply embedded in the histories of the San and Khoi peoples.Between the late 1600s and the early 1800s,South Africa experienced an influx of Dutch,French,Indian,and British settlers,including military personnel,traders,miners,and missionaries.These groups introduced their own cultural traditions,including the art of quilt making.Today,quilting thrives as a vibrant art form in South Africa.展开更多
In early February,the Gaizhou Municipal Government of Liaoning Province and Bosai Group held a signing ceremony for joint construction of a 2.5-million-ton alumina project.It’s learnt that in order to make full use o...In early February,the Gaizhou Municipal Government of Liaoning Province and Bosai Group held a signing ceremony for joint construction of a 2.5-million-ton alumina project.It’s learnt that in order to make full use of its overseas rich bauxite resources and theadvantageous port logistics in Bayuquan,Yingkou,and to strengthen and develop展开更多
On March,Guigang City signed a formal investment agreement with Guangxi Pinglv Group Co.,Ltd.('Pinglv')in Pingguo,known as a County of Aluminum in China.Pinglv’s Chairman Xie Zhiqiang,and Head of Qintang Dist...On March,Guigang City signed a formal investment agreement with Guangxi Pinglv Group Co.,Ltd.('Pinglv')in Pingguo,known as a County of Aluminum in China.Pinglv’s Chairman Xie Zhiqiang,and Head of Qintang District,Guigang City Zhang Jinglian signed the agreement on behalf of the two sides.展开更多
Recently,Hailiang Group’s Southwest copper production base was formally settled in the Jiangjin Luohuang Industrial Park.It’s reported that the project has attracted a total investment of RMB3 billion,covering an ar...Recently,Hailiang Group’s Southwest copper production base was formally settled in the Jiangjin Luohuang Industrial Park.It’s reported that the project has attracted a total investment of RMB3 billion,covering an area of 230 mu with an annual capacity of 90,000-ton copper pipes and60,000-ton copper busbars for air conditioning and refrigeration purposes(3 planned copper pipe production lines for refrigeration purposes,each展开更多
According to the local government depart-ments of Shenzhen on April 15th,a new en-ergy chemical project-carboxylic synthesis and selective oxidation DS-3# project-hasbeen settled in Shenzhen of Guangdongprovince.The p...According to the local government depart-ments of Shenzhen on April 15th,a new en-ergy chemical project-carboxylic synthesis and selective oxidation DS-3# project-hasbeen settled in Shenzhen of Guangdongprovince.The project uses renewable carbohydratessuch as sugarcane,rice straw and stalk as rawmaterials to produce fuel oil additives con-展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.61975015,61575022,and 61421001)the Beijing Natural Science Foundation,China(Grant No.L191004).
文摘A method of measuring the vortex beam topological charge(TC)is proposed based on a device that can directly extract the plane wave form from the vortex beam in which the different propagation angles of the plane waves are uniquely related to the different TCs.Then the TC can be obtained by simply comparing the energy values perceived by two fixed sensors in the detection location with the help of twin omnidirectional energy absorbers(OEAs).Because the settled detection relies only on the simple quantitative value at two fixed positions,neither pattern recognition nor field analysis procedure is applied,thus allowing faster measurement.Some features of the methodology are investigated,and the numerical simulations verify the feasibility and robustness of the system.
文摘Fourteen samples of settled dust from two factories processing rice and wheat straw near Shanghai.China, were examined by dilution plating for total bacteria, gram-negative bacteria, thermophilic actinomycetes, and fungi.They were also examined for atlatoxin endotoxin, and potential to stimulate production of human interleukin 1β (IL-1β) and to consume complement.The concentrations of total microorganisms were consistently greater than 10~7 CFU/g and ranged from 10~7 to 10~9 CFU/g.In general, the level of microbial contamination was greater in the hay dust samples than in the rice dust samples, with bacteria being the most numerous microorganisms observed followed by molds, thermophilic actinomycetes, and yeasts.The predominant fungi were species of Aspergillus, Cladosporium, Penicillium.Trichosporon, and Cryplococcus.No significant levels of aflatoxin were observed and the isolates of A.flavus examined lack significant aflatoxigenic potential.The levels of microorganisms in these samples, the types of organisms found, and the inflammatory mediators such as endotoxin suggest that workers exposed to these dusts may be at risk for respiratory illness. 1990 Academic Press.Inc.
文摘Asthma and allergies are considered by many physicians as being triggered by different substances in the air that people breathe. The lung is the most common site of injury by airborne pollutants. Acute effects, however, may also include non-respiratory signs and symptoms, which may depend upon toxicological characteristics of the substances and host-related factors. The studying of indoor air quality can provide a method for appropriate remedial action. Research suggests that SHD （Settled House Dust） may be a significant source for indoor exposure to different substances. This research study consisted of sampling dust from homes in different area codes. The dust samples were collected from August 2006 thru March 2007 and analyzed using GC/MS （Gas Chromatography/Mass Spectrometry）. The purpose of this research study will display how sampling household dust is a powerful tool for identifying chemicals that contribute to poor indoor air quality.
文摘China,the big factory offering various commodities to companies and individuals all over the world,is attracting more and more merchants purchasing goods in various ways,through agents,on site,via modern communication,etc.One essential concern of these merchants is the quality of these commodities.How can the commodity quality be ensured?If there are
文摘In spring this year,the writershad an interview at JiangsuSuntory Ltd,a Sino-Japanesejoint venture modern foodstuffenterprise founded 11 yearsago with a joint investment ofUS＄25 million,producingmainly Prince Brand beer andmalt as well as other serialproducts.
文摘Indoor settled harmattan dusts at seven sampling stations from the University of Agriculture Makurdi were collected between November, 2014 to March, 2015 (five months) using the wipe sampling methodology. Gravimetric measurement of the dust samples from all the sample locations revealed that dust loading within the institution during the period of assessment ranges from 4.475 - 6.533 g/m2. Masses of indoor settled dust were expectedly higher along high traffic, untarred roads and construction sites as well as in older buildings than others during the period of this study. AAS analysis of the dust samples shows that heavy metal concentrations (mg/kg dry weight) throughout the sampling stations during the period of investigation range from 0.2372 - 0.7152 for Cu, 293.6 - 884.9 for Fe, 4.265 - 68.55 for Mn and 4.239 - 42.53 for Zn. The concentrations of all the metals investigated were found to be lower when compared with related values in literature and were within acceptable limits during the period of this study. Pearson correlation matrix also shows positive correlation between the possible metal pairs at 95% level of confidence, indicating a similar source which may be from anthropogenic activities within and outside the area.
文摘In the article,the patients who still had some symptoms after the pacemakershad been settled were reviewed.There were nine cases in which serious clinicalsymptoms existed.The main symptoms were thoracodepression,palpitation,dizzinessand pant,twitch and syncope occurred for serious patients.Six cases were found totake their sources at heart by measuring blood pressure,monitoring and recordingelectrocardiogram,detecting irritability and the threshold limit value of pacemaking,thoracic X-ray checking and Holter etc.In one case after a VVI pacemaker had
文摘The second round of the annual master's program examinations are underway through May at Chinese universities nationwide.Families are optimistic that their graduate school hopefuls will be wenle(meaning"secured")after the examinations.
基金supported by Qingdao Hi-image Technologies Co., Ltdin part by the NSFC of China under Grant 62174149, 61974118, 62004156the National Key R&D Program of China under Grant 2022YFC2404902
文摘This paper presents a 16-bit,18-MSPS(million samples per second)flash-assisted successive-approximation-register(SAR)analog-to-digital converter(ADC)utilizing hybrid synchronous and asynchronous(HYSAS)timing control logic based on an on-chip delay-locked loop(DLL).The HYSAS scheme can provide a longer settling time for the capacitive digital-to-analog converter(CDAC)than the synchronous and asynchronous SAR ADC.Therefore,the issue of incomplete settling or ringing in the DAC voltage for cases of either on-chip or off-chip reference voltage can be solved to a large extent.In addition,the fore-ground calibration of the CDAC’s mismatch is performed with a finite-impulse-response bandpass filter(FIR-BPF)based least-mean-square(LMS)algorithm in an off-chip FPGA(field programmable gate array).Fabricated in 40-nm CMOS process,the proto-type ADC achieves 94.02-dB spurious-free dynamic range(SFDR),and 75.98-dB signal-to-noise-and-distortion ratio(SNDR)for a 2.88-MHz input under 18-MSPS sampling rate.
文摘The transformation of Yundang Lake from a stinky lake to an urban reception hall has made it a showcase of ecologival restoration in China.BEFORE settling down in the City of Xiamen,Scott Patrick and his wife spent long hours searching online for just the right part of the city.When they saw Yundang Lake in west Xiamen,the couple knew they had hit the jackpot.“The picture of the beautiful lake circled by lush vegetation caught our attention.We knew this was the place we were looking for,”said Patrick.Later,after setting foot in Xiamen,he told himself he had definitely made the right life decision.
文摘What makes an ideal life?For many,it’s escaping crowded and expensive big cities and the accompanying long,exhausting commutes to settle in a beautiful,warm,and budget-friendly city,or hitting the road and going elsewhere anytime you want.No alarm clocks,no punching in for work,no pressure from bosses-do a little work and then enjoy your life.This is the life for many digital nomads.
文摘Before settling down in the city of Xiamen,Scott Patrick and his wife spent long hours searching online for just the right part of the city.When they saw Yundang Lake in west Xiamen,the couple knew they had hit the jackpot.“The picture of the beautiful lake circled by lush vegetation caught our attention.We knew this was the place we were looking for,”said Patrick.Later,after setting foot in Xiamen,he told himself he had definitely made the right life decision.
文摘Quilt Arts of South Africa Edited by MARSHA MACDOWELL Indiana University Press In the far south of the African continent,women have a long tradition of crafting bed coverings using textile techniques commonly used in quilting,a practice deeply embedded in the histories of the San and Khoi peoples.Between the late 1600s and the early 1800s,South Africa experienced an influx of Dutch,French,Indian,and British settlers,including military personnel,traders,miners,and missionaries.These groups introduced their own cultural traditions,including the art of quilt making.Today,quilting thrives as a vibrant art form in South Africa.
文摘In early February,the Gaizhou Municipal Government of Liaoning Province and Bosai Group held a signing ceremony for joint construction of a 2.5-million-ton alumina project.It’s learnt that in order to make full use of its overseas rich bauxite resources and theadvantageous port logistics in Bayuquan,Yingkou,and to strengthen and develop
文摘On March,Guigang City signed a formal investment agreement with Guangxi Pinglv Group Co.,Ltd.('Pinglv')in Pingguo,known as a County of Aluminum in China.Pinglv’s Chairman Xie Zhiqiang,and Head of Qintang District,Guigang City Zhang Jinglian signed the agreement on behalf of the two sides.
文摘Recently,Hailiang Group’s Southwest copper production base was formally settled in the Jiangjin Luohuang Industrial Park.It’s reported that the project has attracted a total investment of RMB3 billion,covering an area of 230 mu with an annual capacity of 90,000-ton copper pipes and60,000-ton copper busbars for air conditioning and refrigeration purposes(3 planned copper pipe production lines for refrigeration purposes,each
文摘According to the local government depart-ments of Shenzhen on April 15th,a new en-ergy chemical project-carboxylic synthesis and selective oxidation DS-3# project-hasbeen settled in Shenzhen of Guangdongprovince.The project uses renewable carbohydratessuch as sugarcane,rice straw and stalk as rawmaterials to produce fuel oil additives con-
