Since 2023,the Spring Festival holiday tourism market has recovered significantly,and the market value has steadily increased.According to the newly revised Regulation on Public Holidays for National Annual Festivals ...Since 2023,the Spring Festival holiday tourism market has recovered significantly,and the market value has steadily increased.According to the newly revised Regulation on Public Holidays for National Annual Festivals and Memorial Days and some holiday arrangements in 2025,since 2025,New Year’s Eve has been included as a statutory holiday,and the benefits of increasing the Spring Festival holiday to 8 days have further ignited everyone’s enthusiasm for Spring Festival travel.展开更多
Slow/controlled release fertilizers （SRFs/CRFs） have been paid more at- tentions by the researchersin recent years. In this paper, the application effects and methods, types, current problem and development prospect...Slow/controlled release fertilizers （SRFs/CRFs） have been paid more at- tentions by the researchersin recent years. In this paper, the application effects and methods, types, current problem and development prospect of SRFs/CRFsboth at home and abroad were reviewed. The production principles and processes of urea- formaldehyde slow release fertilizers were introduced; and It is suggested that the urea-formaldehyde slow release fertilizers show great development to ease energy and environment pressure.展开更多
Quantifying the rockburst consequence is of critical importance to reduce the hazards with preventative measures in underground mines and deep tunnels. Contours of energy components within a pillar model are plotted a...Quantifying the rockburst consequence is of critical importance to reduce the hazards with preventative measures in underground mines and deep tunnels. Contours of energy components within a pillar model are plotted at different rockmass damage stages, and plastic strain work and released energy are proposed as indicators of rockmass damage consequence. One pillar model under different loading stiffness is simulated to assess indicators of pillar burst and the resulting damages. The results show the rockmass damage under soft loading stiffness has larger magnitude of plastic strain work and released energy than that which is under stiff loading stiffness, indicating the rockburst consequence can be quantified with plastic strain work and released energy in numerical models. With the quantified rockburst consequence,preventative measures can be taken to avoid severe hazards to mine safety.展开更多
Aim： To develop a method for assessing sperm function by measuring released acrosin activity during the acrosome reaction （AR）. Methods： Human semen samples were obtained from 24 healthy donors with proven fertili...Aim： To develop a method for assessing sperm function by measuring released acrosin activity during the acrosome reaction （AR）. Methods： Human semen samples were obtained from 24 healthy donors with proven fertility after 3-7 days of sexual abstinence. After collection, samples were liquefied for 30 min at room temperature. Standard semen parameters were evaluated according to World Health Organization （WHO） criteria. Calcium ionophore A23187 and progesterone （P4） were used to stimulate the sperm to undergo AR. After treatment, sperm were incubated with the supravital dye Hoechst33258, fixed in a glutaraldehyde-phosphate-buffered saline solution, and the acrosomal status was determined by fluorescence microscopy with fluorescein isothiocyanate-labeled Pisum sativum agglutinin （FITC-PSA）. The percentage of sperm undergoing AR （AR%） was compared to sperm acrosin activities as assessed by spectrocolorimetry. The correlation between AR% and acrosin activity was determined by statistical analysis. Results： The AR% and released acrosin activity were both markedly increased with A23187 and P4 stimulation. Sperm motility and viability were significantly higher after stimulation with P4 versus stimulation with A23187 （P 〈 0.001）. There was a significant positive correlation between released acrosin activity and AR% determined by FITC-PSA staining （r= 0.916, P 〈 0.001）. Conclusion： Spectrocolorimetric measurement of released acrosin activity might serve as a reasonable alternative method to evaluate AR. （Asian J Androl 2008 Mar, 10： 236-242）展开更多
Welan gum is widely applied in environmental admixtures due to its good thickening and rheological properties. With its powerful charge density in the molecular structure, the competitive adsorption between welan gum ...Welan gum is widely applied in environmental admixtures due to its good thickening and rheological properties. With its powerful charge density in the molecular structure, the competitive adsorption between welan gum and other admixtures happened remarkably during the addition process. So controlling the releasing rate of welan gum will be able to improve the competitive adsorption, while having no disadvantages to its thickening and workability at the same time. The investigation of influences of the delay released welan gum（DRWG） on the fluidity and strength of cement mortar, bleeding rate and rheological properties of cement paste, adsorption amount and zeta potential of clinker single mineralogical phases, shows that there will be a better mortar workability and certain improvement in mortar strength with DRWG. For mortar with DRWG, the standing bleeding rate is 0, and there is less thixotropic, less adsorption, and a lower zeta potential value on the surface of clinker mineralogical phases.展开更多
Most studies on solute transport in coastal aquifers affected by tides focus on the transport of instantaneous released solute,and there are few studies on continuously released solute affected by tides.In this study,...Most studies on solute transport in coastal aquifers affected by tides focus on the transport of instantaneous released solute,and there are few studies on continuously released solute affected by tides.In this study,the image monitoring method is used to establish the quantitative relationship between the concentration of the colored tracer and the hue value of the image,and the digital image is used to determine the tracer concentration distribution.Using image monitoring method laboratory experiments,quantitative analysis of the characteristics of continuously released solute transport in coastal unconfined aquifers under the tidal influence.Experiments show that the high tide inhibits the increase in the concentration of each point in the aquifer.Under the influence of tides,the solute plume retreats towards the land.During the low tide period,the solute plume migrates toward the sea again.And the solute plume will maintain a relatively stable shape after entering the aquifer for a long enough time.Ignoring the tidal effect seems to have little effect on the estimation of the position of the solute plume,but ignoring the tidal effect has a certain influence on the estimation of the dispersion range of the solute plume.No matter whether considering the tidal action,the final dispersion range of the solute plume is almost the same.But before the solute plume reaches a stable state,ignoring the tidal effect will lead to a smaller dispersion range of the solute plume.展开更多
Started from 5-hydroxy-2-pentanone, (R)(E)-3,7-dimethyl-2-octene-1,8-dioic acid, callosobruchusic acid, was synthesized via five steps with D-(-)-camphor sultam as the chiral auxiliary. It was of good optical purity a...Started from 5-hydroxy-2-pentanone, (R)(E)-3,7-dimethyl-2-octene-1,8-dioic acid, callosobruchusic acid, was synthesized via five steps with D-(-)-camphor sultam as the chiral auxiliary. It was of good optical purity and yield.展开更多
In this work,based on the liquid-drop model and considering the shell correction,we propose a simple formula to calculate the released energy of proton radioactivity(Q_(p)).The parameters of this formula are obtained ...In this work,based on the liquid-drop model and considering the shell correction,we propose a simple formula to calculate the released energy of proton radioactivity(Q_(p)).The parameters of this formula are obtained by fitting the experimental data of 29 nuclei with proton radioactivity from ground state.The standard deviation between the theoretical values and experimental ones is only 0.157 Me V.In addition,we extend this formula to calculate 51 proton radioactivity candidates in region 51≤Z≤83 taken from the latest evaluated atomic mass table AME2016 and compared with the Q_(p)calculated by WS4 and HFB-29.The calculated results indicate that the evaluation ability of this formula for Q_(p)is inferior to WS4 while better than HFB-29.展开更多
The second China International Import Expo was held in Shanghai on November5th,2019.Chinese President Xi Jinping delivered a keynote speech at the opening ceremony of the China International Import Expo for two consec...The second China International Import Expo was held in Shanghai on November5th,2019.Chinese President Xi Jinping delivered a keynote speech at the opening ceremony of the China International Import Expo for two consecutive years,which fully demonstrates the great importance the Chinese government attaches to the expo.展开更多
A new type of dissolved air released flotation column is developed to treat wastewater containing Cr（Ⅵ） based on advantages of both dissolved air floatation and column floatation. By using a column with a diameter ...A new type of dissolved air released flotation column is developed to treat wastewater containing Cr（Ⅵ） based on advantages of both dissolved air floatation and column floatation. By using a column with a diameter of 50 mm and a specially made dissolved air releaser, micro-bubbles inside the column can be formed. N2H4H2O was used as reductant, AlCl3 as flocculant, C12H25SO3Na（SDS） as surfactant in the experiment. The effects of pH of wastewater, pressure of dissolved air, ratio of return water, and concentration of flocculant and surfactant on the removal efficiency are studied. The results show that the efficiency of dissolved air released flotation column is much higher than that of other approaches after the operation parameters are optimized, with the reduction ratio of Cr（Ⅵ ） in wastewater reaching 98%. So this technique can be widely used in wastewater treatment展开更多
Agreen supply chain evaluation system was released recently to measure a brand’s perfor-mance in managing the environmental impacts of their supply chains in China.The evaluation system,namely the Corporate Informati...Agreen supply chain evaluation system was released recently to measure a brand’s perfor-mance in managing the environmental impacts of their supply chains in China.The evaluation system,namely the Corporate Information Transparency Index(CITI),was released by the Institute of Public and Environmental Affairs(IPE)and the Natural Resources Defense Council(NRDC)at the 2014 Eco-Forum Global Conference in Guiyang,capital of Guizhou Province in July.展开更多
Five Chinese national standards on electrically propelled road vehicles,leaded and drafted by CRRC Times Electric Vehicle Co.,Ltd.,were offi cially released recently.The standards include 3 parts of GB/T 18384 on the ...Five Chinese national standards on electrically propelled road vehicles,leaded and drafted by CRRC Times Electric Vehicle Co.,Ltd.,were offi cially released recently.The standards include 3 parts of GB/T 18384 on the safety specifi cations for electrically propelled road vehicles,that is GB/T 18384.1-2015,GB/T 18384.2-2015and GB/T 18384.3-2015,and 2 parts of GB/T 18488 on drive motor system for electric vehicles,including GB/T 18488.1-2015 and GB/T 18488.2-2015.展开更多
As the fifth largest licensing market in the world,China’s Licensing market has great potential to grow.The market is so big that it is always difficult to see into the details.To understand the rapidly growing licen...As the fifth largest licensing market in the world,China’s Licensing market has great potential to grow.The market is so big that it is always difficult to see into the details.To understand the rapidly growing licensing industry in China,China Toy and Juvenile Products Association(CTJPA)conducted a professional survey and issued the China Licensing Industry Report2018earlier this year.展开更多
The Chinese first national standard,GB/T 32610-2016,Technical specification of daily protective mask,was released offi cially on April 25,2016 and will be implemented from November 1,2016.This is the first GB standard...The Chinese first national standard,GB/T 32610-2016,Technical specification of daily protective mask,was released offi cially on April 25,2016 and will be implemented from November 1,2016.This is the first GB standard on protective mask for civil use in China,which includes two key indicators of wear safety and PM 2.5 protective performance.The PM 2.5 protective performance can be classified into four grades of A,B,C and D according to the air quality.Grade A is applicable when the concen-展开更多
After two years of research and development, the Center for International Cultural Exchange under the Ministry of Culture of China has recently released a new type of DVD which is double-faced, double-system and bears...After two years of research and development, the Center for International Cultural Exchange under the Ministry of Culture of China has recently released a new type of DVD which is double-faced, double-system and bears ten languages. Teststatistics show that all its indicators come up withthose of its foreign counterparts. Now it has beenput into mass production.This new type of DVD features the following performances. It is a high-clarity one, with the horizontal clarity more than 500. It has a superb sound effect, capable of recording various stereo signals such as DOLBY DIGITAL and DTS. It can record dubbing in eight languages and展开更多
China now has its own luxury brands. The four brands Feitian (Moutai spirit), Yong-Qi Zitan (furniture), Rongbaozhai (works of art) and Dongding Oolong (tea) were released as the first Chinese luxury brands by the Chi...China now has its own luxury brands. The four brands Feitian (Moutai spirit), Yong-Qi Zitan (furniture), Rongbaozhai (works of art) and Dongding Oolong (tea) were released as the first Chinese luxury brands by the China Luxury Institute on Nov. 11.展开更多
China's Ministry of Land and Resources released the first batch of rare earth mining quotas in 2017, according to an announcement on the ministry's website. The total mining amount for the first batch is 52,50...China's Ministry of Land and Resources released the first batch of rare earth mining quotas in 2017, according to an announcement on the ministry's website. The total mining amount for the first batch is 52,500 tonnes, equal to the number in 2016. Out of the 52,500 tonnes, there are 43,550 tonnes for light rare earths and 8,950 tonnes for medium and heavy rare earths.展开更多
Giving a professional boost to the IFFAIR During the 21st Ningbo International Fashion Fair（hereinafter referred to as＂IFFAIR＂）from October 19th to 22nd,2018/19 A/W Fabrics China Trend Show was staged as one of th...Giving a professional boost to the IFFAIR During the 21st Ningbo International Fashion Fair（hereinafter referred to as＂IFFAIR＂）from October 19th to 22nd,2018/19 A/W Fabrics China Trend Show was staged as one of the important sections,showcasing the professional and instructive identity of the fair and booting the overall optimization and upgrading of the fair.展开更多
An international team led by Prof. Fu Jianning from Beijing Normal University and Dr. ZONG Weikai, the LAMOST youth researcher, together with researchers from Belgium,USA, Poland and Italy, released the spectra catalo...An international team led by Prof. Fu Jianning from Beijing Normal University and Dr. ZONG Weikai, the LAMOST youth researcher, together with researchers from Belgium,USA, Poland and Italy, released the spectra catalog,conducted in the survey period from 2012 to 2017。展开更多
文摘Since 2023,the Spring Festival holiday tourism market has recovered significantly,and the market value has steadily increased.According to the newly revised Regulation on Public Holidays for National Annual Festivals and Memorial Days and some holiday arrangements in 2025,since 2025,New Year’s Eve has been included as a statutory holiday,and the benefits of increasing the Spring Festival holiday to 8 days have further ignited everyone’s enthusiasm for Spring Festival travel.
基金Supported by the Special Fund for Construction of National Tea Industry Technology System(CARS-23)Funding Project of Hubei Agricultural Science and Technology Innovation Center(2011-620-005-003-04)~~
文摘Slow/controlled release fertilizers （SRFs/CRFs） have been paid more at- tentions by the researchersin recent years. In this paper, the application effects and methods, types, current problem and development prospect of SRFs/CRFsboth at home and abroad were reviewed. The production principles and processes of urea- formaldehyde slow release fertilizers were introduced; and It is suggested that the urea-formaldehyde slow release fertilizers show great development to ease energy and environment pressure.
基金funded by the National Institute of Occupational Health and Science (NIOSH) under Grant Number 200-2016-90154
文摘Quantifying the rockburst consequence is of critical importance to reduce the hazards with preventative measures in underground mines and deep tunnels. Contours of energy components within a pillar model are plotted at different rockmass damage stages, and plastic strain work and released energy are proposed as indicators of rockmass damage consequence. One pillar model under different loading stiffness is simulated to assess indicators of pillar burst and the resulting damages. The results show the rockmass damage under soft loading stiffness has larger magnitude of plastic strain work and released energy than that which is under stiff loading stiffness, indicating the rockburst consequence can be quantified with plastic strain work and released energy in numerical models. With the quantified rockburst consequence,preventative measures can be taken to avoid severe hazards to mine safety.
文摘Aim： To develop a method for assessing sperm function by measuring released acrosin activity during the acrosome reaction （AR）. Methods： Human semen samples were obtained from 24 healthy donors with proven fertility after 3-7 days of sexual abstinence. After collection, samples were liquefied for 30 min at room temperature. Standard semen parameters were evaluated according to World Health Organization （WHO） criteria. Calcium ionophore A23187 and progesterone （P4） were used to stimulate the sperm to undergo AR. After treatment, sperm were incubated with the supravital dye Hoechst33258, fixed in a glutaraldehyde-phosphate-buffered saline solution, and the acrosomal status was determined by fluorescence microscopy with fluorescein isothiocyanate-labeled Pisum sativum agglutinin （FITC-PSA）. The percentage of sperm undergoing AR （AR%） was compared to sperm acrosin activities as assessed by spectrocolorimetry. The correlation between AR% and acrosin activity was determined by statistical analysis. Results： The AR% and released acrosin activity were both markedly increased with A23187 and P4 stimulation. Sperm motility and viability were significantly higher after stimulation with P4 versus stimulation with A23187 （P 〈 0.001）. There was a significant positive correlation between released acrosin activity and AR% determined by FITC-PSA staining （r= 0.916, P 〈 0.001）. Conclusion： Spectrocolorimetric measurement of released acrosin activity might serve as a reasonable alternative method to evaluate AR. （Asian J Androl 2008 Mar, 10： 236-242）
基金Funded by the National Natural Science Foundation of China(No.51202173)
文摘Welan gum is widely applied in environmental admixtures due to its good thickening and rheological properties. With its powerful charge density in the molecular structure, the competitive adsorption between welan gum and other admixtures happened remarkably during the addition process. So controlling the releasing rate of welan gum will be able to improve the competitive adsorption, while having no disadvantages to its thickening and workability at the same time. The investigation of influences of the delay released welan gum（DRWG） on the fluidity and strength of cement mortar, bleeding rate and rheological properties of cement paste, adsorption amount and zeta potential of clinker single mineralogical phases, shows that there will be a better mortar workability and certain improvement in mortar strength with DRWG. For mortar with DRWG, the standing bleeding rate is 0, and there is less thixotropic, less adsorption, and a lower zeta potential value on the surface of clinker mineralogical phases.
基金supported by the National Natural Science Foundation of China(No.42172281)the Opening Fund of the State Key Laboratory of China University of Geosciences(Wuhan)(No.SKJ2018055)。
文摘Most studies on solute transport in coastal aquifers affected by tides focus on the transport of instantaneous released solute,and there are few studies on continuously released solute affected by tides.In this study,the image monitoring method is used to establish the quantitative relationship between the concentration of the colored tracer and the hue value of the image,and the digital image is used to determine the tracer concentration distribution.Using image monitoring method laboratory experiments,quantitative analysis of the characteristics of continuously released solute transport in coastal unconfined aquifers under the tidal influence.Experiments show that the high tide inhibits the increase in the concentration of each point in the aquifer.Under the influence of tides,the solute plume retreats towards the land.During the low tide period,the solute plume migrates toward the sea again.And the solute plume will maintain a relatively stable shape after entering the aquifer for a long enough time.Ignoring the tidal effect seems to have little effect on the estimation of the position of the solute plume,but ignoring the tidal effect has a certain influence on the estimation of the dispersion range of the solute plume.No matter whether considering the tidal action,the final dispersion range of the solute plume is almost the same.But before the solute plume reaches a stable state,ignoring the tidal effect will lead to a smaller dispersion range of the solute plume.
基金Supported by the National Natural Science Foundation of China( No. 2 9872 0 12)
文摘Started from 5-hydroxy-2-pentanone, (R)(E)-3,7-dimethyl-2-octene-1,8-dioic acid, callosobruchusic acid, was synthesized via five steps with D-(-)-camphor sultam as the chiral auxiliary. It was of good optical purity and yield.
基金Supported by National Natural Science Foundation of China(Grant No.11205083 and No.11975132)the construct program of the key discipline in Hunan province,the Research Foundation of Education Bureau of Hunan Province,China(Grant No.18A237)+1 种基金the Innovation Group of Nuclear and Particle Physics in USC,the Shandong Province Natural Science Foundation,China(Grant No.ZR2019YQ01)the Hunan Provincial Innovation Foundation For Postgraduate(Grant No.CX20200909)。
文摘In this work,based on the liquid-drop model and considering the shell correction,we propose a simple formula to calculate the released energy of proton radioactivity(Q_(p)).The parameters of this formula are obtained by fitting the experimental data of 29 nuclei with proton radioactivity from ground state.The standard deviation between the theoretical values and experimental ones is only 0.157 Me V.In addition,we extend this formula to calculate 51 proton radioactivity candidates in region 51≤Z≤83 taken from the latest evaluated atomic mass table AME2016 and compared with the Q_(p)calculated by WS4 and HFB-29.The calculated results indicate that the evaluation ability of this formula for Q_(p)is inferior to WS4 while better than HFB-29.
文摘The second China International Import Expo was held in Shanghai on November5th,2019.Chinese President Xi Jinping delivered a keynote speech at the opening ceremony of the China International Import Expo for two consecutive years,which fully demonstrates the great importance the Chinese government attaches to the expo.
基金Projects 50425414 supported by National Fund for Distinguished Young Scholars and B200403 by Science and Technology Fund of China University ofMining &Technology
文摘A new type of dissolved air released flotation column is developed to treat wastewater containing Cr（Ⅵ） based on advantages of both dissolved air floatation and column floatation. By using a column with a diameter of 50 mm and a specially made dissolved air releaser, micro-bubbles inside the column can be formed. N2H4H2O was used as reductant, AlCl3 as flocculant, C12H25SO3Na（SDS） as surfactant in the experiment. The effects of pH of wastewater, pressure of dissolved air, ratio of return water, and concentration of flocculant and surfactant on the removal efficiency are studied. The results show that the efficiency of dissolved air released flotation column is much higher than that of other approaches after the operation parameters are optimized, with the reduction ratio of Cr（Ⅵ ） in wastewater reaching 98%. So this technique can be widely used in wastewater treatment
文摘Agreen supply chain evaluation system was released recently to measure a brand’s perfor-mance in managing the environmental impacts of their supply chains in China.The evaluation system,namely the Corporate Information Transparency Index(CITI),was released by the Institute of Public and Environmental Affairs(IPE)and the Natural Resources Defense Council(NRDC)at the 2014 Eco-Forum Global Conference in Guiyang,capital of Guizhou Province in July.
文摘Five Chinese national standards on electrically propelled road vehicles,leaded and drafted by CRRC Times Electric Vehicle Co.,Ltd.,were offi cially released recently.The standards include 3 parts of GB/T 18384 on the safety specifi cations for electrically propelled road vehicles,that is GB/T 18384.1-2015,GB/T 18384.2-2015and GB/T 18384.3-2015,and 2 parts of GB/T 18488 on drive motor system for electric vehicles,including GB/T 18488.1-2015 and GB/T 18488.2-2015.
文摘As the fifth largest licensing market in the world,China’s Licensing market has great potential to grow.The market is so big that it is always difficult to see into the details.To understand the rapidly growing licensing industry in China,China Toy and Juvenile Products Association(CTJPA)conducted a professional survey and issued the China Licensing Industry Report2018earlier this year.
文摘The Chinese first national standard,GB/T 32610-2016,Technical specification of daily protective mask,was released offi cially on April 25,2016 and will be implemented from November 1,2016.This is the first GB standard on protective mask for civil use in China,which includes two key indicators of wear safety and PM 2.5 protective performance.The PM 2.5 protective performance can be classified into four grades of A,B,C and D according to the air quality.Grade A is applicable when the concen-
文摘After two years of research and development, the Center for International Cultural Exchange under the Ministry of Culture of China has recently released a new type of DVD which is double-faced, double-system and bears ten languages. Teststatistics show that all its indicators come up withthose of its foreign counterparts. Now it has beenput into mass production.This new type of DVD features the following performances. It is a high-clarity one, with the horizontal clarity more than 500. It has a superb sound effect, capable of recording various stereo signals such as DOLBY DIGITAL and DTS. It can record dubbing in eight languages and
文摘China now has its own luxury brands. The four brands Feitian (Moutai spirit), Yong-Qi Zitan (furniture), Rongbaozhai (works of art) and Dongding Oolong (tea) were released as the first Chinese luxury brands by the China Luxury Institute on Nov. 11.
文摘China's Ministry of Land and Resources released the first batch of rare earth mining quotas in 2017, according to an announcement on the ministry's website. The total mining amount for the first batch is 52,500 tonnes, equal to the number in 2016. Out of the 52,500 tonnes, there are 43,550 tonnes for light rare earths and 8,950 tonnes for medium and heavy rare earths.
文摘Giving a professional boost to the IFFAIR During the 21st Ningbo International Fashion Fair（hereinafter referred to as＂IFFAIR＂）from October 19th to 22nd,2018/19 A/W Fabrics China Trend Show was staged as one of the important sections,showcasing the professional and instructive identity of the fair and booting the overall optimization and upgrading of the fair.
文摘An international team led by Prof. Fu Jianning from Beijing Normal University and Dr. ZONG Weikai, the LAMOST youth researcher, together with researchers from Belgium,USA, Poland and Italy, released the spectra catalog,conducted in the survey period from 2012 to 2017。
