Conflict between conservation and community livelihood is a significant issue in China.Based on Sustainable Livelihood Framework(SLA),this study systematically analyzed livelihoods assets of a community in a Yunnan sn...Conflict between conservation and community livelihood is a significant issue in China.Based on Sustainable Livelihood Framework(SLA),this study systematically analyzed livelihoods assets of a community in a Yunnan snub-nosed monkey conservation area and found that the livelihood pentagon of the community was shaped by multiple but frail and unstable income sources,abundant natural resources with restricted use right,underutilized labors,inadequate financial resources,inconvenient physical capital and weak social capital.Villagers'income heavily depended on forest,and grazing and nontimber forest products(NTFP)collection are common and major income sources for villagers.However,differentiation of income dependence on forest among villagers'groups showed that there is no close correlation between the level of income and the level of income dependence on forest.Households'daily life also heavily depended on the forest due to heating and pig-feed cooking;hence,fuelwood cannot be easily replaced by any other energy resource for a long period.展开更多
BACKGROUND： Because of the limitation of technique, there are few researches on regulating function o central hypothalamus by metabolism, especially the researches on real-time function. OBJECTIVE： To evaluate the r...BACKGROUND： Because of the limitation of technique, there are few researches on regulating function o central hypothalamus by metabolism, especially the researches on real-time function. OBJECTIVE： To evaluate the response of hypothalamus to oral glucose tolerance test （OGTT） in differen body-weighted subjects by using functional magnetic resonance imaging （fMRI） so as to investigate th relationship between the sensitivity of hypothalamus in glycoregulation and disturbance of carbohydrate metabolism. DESIGN： Paired design. SETTING： Department of Radiology and Beijing Geriatrics Institute, Beijing Hospital, National Publi Health Bureau. PARTICIPANTS： A total of twenty healthy volunteers were selected from Beijing Geriatrics Institute National Public Health Bureau, including 10 subjects with obesity （5 males and 5 females; body mass 〉 28.0 kg/m2） and 10 subjects with normal body mass （5 males and 5 females; body mass from 18.5 to 23.9 kg/m2）. All subjects gave written informed consent before participating in the study. METHODS： fMRI study was performed on GE 1.5 T Signa Twinspeed Infinity with Excite. Each voluntee was ingested of glucose during the fMRI scan. T2＊ images were acquired using a single-shot gradient echo （EPI） technique. The parameters of EPI included： TR 3 000 ms, TE 40 ms, Flip angle 90°, field of view （FOV） 24 cm × 24 cm, thickness 5 mm, gap 0 mm, matrix 64 × 64, number of excitation 1. All 10 subjects with normal body mass underwent a repeat fMRI scan after consuming an equivalent amount o water without glucose on a separate day. The procedure for the fMRI scan with water intake was the same a for glucose ingestion. fMRI data were processed with Intensity Averaging Method. MAIN OUTCOME MEASURES： The central response of hypothalamus and feedback orientation during OGTT in different body-weighted subjects. RESULTS： An acute transient decrease of fMRI intensity in posterior inferior and anterior inferior o hypothalamus was observed in all subjects within 2 minutes after oral glucose intake. This decrease wa followed by a recovery to the baseline. However, obese subjects had a delayed intensity decrease [（1.96± 1.06） minutes vs. （1.04±0.71） minutes, t =2.14, P 〈 0.05] and longer recovery time [（26.62±7.35 minutes vs. （16.29±6.42） minutes, t =3.67, P 〈 0.01] as compared with normal body-weight subjects Furthermore, decreased fMRI intensity was significant different from baseline intensity [（5.7±2.5）% vs （14.3±5.5）%, t =2.56, P 〈 0.05] in obese subjects, but not in normal body-weight subjects. The area o hypothalamus in normal body-weight volunteers demonstrated no significant signal change before and afte oral water ingestion （P 〉 0.05）. CONCLUSION： Hypothalamus response to glucose loading is different in normal body-weighted and obes subjects. This suggests that fMRI is a useful tool to evaluate the central regulation of glucose metabolism.展开更多
In this paper, the Foxconn epidemic event in Zhengzhou was taken as an example to analyze the evolution of online public opinion on public health emergencies. In order to improve the performance of online public opini...In this paper, the Foxconn epidemic event in Zhengzhou was taken as an example to analyze the evolution of online public opinion on public health emergencies. In order to improve the performance of online public opinion analysis, based on the life cycle theory and LDA theory, the emotional changes of Internet users in four stages of the Foxconn incident centered on the evolution of inscription were divided. The emotions of netizen speech at different stages are analyzed based on CNN-BiLSTM + Attention model, which uses Convolutional Neural Network (CNN) to extract local features. Bi-directional Long Short-Term Memory (BiLSTM) is used to efficiently extract contextual semantic features and long distance dependencies, and then combined with attention mechanism to add emotional features. Finally, Softmax classifier realizes text emotion prediction. The experimental results show that: compared with TextCNN, BiLSTM, BiLSTM + Attenion, CNN-BiLSTM model, the emotion classification model has better effects in the accuracy rate, accuracy rate, recall rate and F value. By analyzing the emotional distribution and evolution trend of public opinion under “text topic”, the paper accurately deconstructs the development characteristics of public opinion in public health emergencies, in order to provide reference for relevant departments to deal with public opinion in public health emergencies. .展开更多
This study reveals the superimposing ecological risk of chemical form and total amount of heavy metals(HMs)and their source in the sediments of Baiyangdian Lake,also provides important scientific basis for environment...This study reveals the superimposing ecological risk of chemical form and total amount of heavy metals(HMs)and their source in the sediments of Baiyangdian Lake,also provides important scientific basis for environmental protection and sustainable development of the Xiong’an New Area.The total amount and distribution of typical HMs(As,Cd,Cr,Cu,Pb,and Zn)in the sediments of Baiyangdian Lake and its peripheral rivers were analyzed.Moreover,five chemical forms(F1−F5)of HMs in the sediments of Baiyangdian Lake were identified by an improved Tessier five-step method.Risk Assessment Coding Method(RAC)and mean sediment quality guideline quotient(SQG-Q)were used to assess ecological risk.In addition,the improved enrichment coefficient and statistical methods were used to identify the sources of HMs.The contents of HMs in the lake sediment is about 1 to 3 times the background values,with higher concentration in the central area and lower concentration in the northern and southern areas.The pH and organic matter concentrations were 6.99 to 7.28 and 3.98%to 5.69%,respectively.The chemical form of HM in the lake sediments is mainly in residue form.Ion-exchangeable form and carbonate bound form of Cd account for the highest proportion(19%to 42%and 17%to 25%,respectively);Pb and As have a higher proportion of iron and manganese oxidation form(21%to 51%and 15%to 31%,respectively);Cu and Zn have a higher proportion of organic bound form(11%to 39%and 8%to 25%,respectively).RAC indicates a high potential risk for Cd,Pb,and As,and the SQG-Q indicated a high ecological risk for As,Cr and Pb.The form and behavior of HMs,such as bioavailability and toxicity,are largely influenced by the physicochemical properties of the sediments.Organic matter and pH mainly affect the ion exchange form of HMs,while the total amount of HMs mainly affects the binding form and residual form of HMs with organic matter.Changes in the content and morphology of Cu,Zn,and Cd in Baiyangdian sediments are mainly influenced by inflow river,which are mainly from human industrial activities,such as wastewater discharge.There are various sources of HMs,such as Pb,which mainly comes from human life activities such as domestic waste,leaching,aquaculture,and tourism in Baiyangdian village,influenced by lead and natural environment and related to the spatial location of the lake;while the source of chromium is more complex.展开更多
基金supported by the Nature Conservancy[grant number NA/KUNMING/YU030112]Yunnan Provincial Fund of Social Science[grant number YB2013024]
文摘Conflict between conservation and community livelihood is a significant issue in China.Based on Sustainable Livelihood Framework(SLA),this study systematically analyzed livelihoods assets of a community in a Yunnan snub-nosed monkey conservation area and found that the livelihood pentagon of the community was shaped by multiple but frail and unstable income sources,abundant natural resources with restricted use right,underutilized labors,inadequate financial resources,inconvenient physical capital and weak social capital.Villagers'income heavily depended on forest,and grazing and nontimber forest products(NTFP)collection are common and major income sources for villagers.However,differentiation of income dependence on forest among villagers'groups showed that there is no close correlation between the level of income and the level of income dependence on forest.Households'daily life also heavily depended on the forest due to heating and pig-feed cooking;hence,fuelwood cannot be easily replaced by any other energy resource for a long period.
基金a grant from the National Nature Science Foundation of China, No.C30370432
文摘BACKGROUND： Because of the limitation of technique, there are few researches on regulating function o central hypothalamus by metabolism, especially the researches on real-time function. OBJECTIVE： To evaluate the response of hypothalamus to oral glucose tolerance test （OGTT） in differen body-weighted subjects by using functional magnetic resonance imaging （fMRI） so as to investigate th relationship between the sensitivity of hypothalamus in glycoregulation and disturbance of carbohydrate metabolism. DESIGN： Paired design. SETTING： Department of Radiology and Beijing Geriatrics Institute, Beijing Hospital, National Publi Health Bureau. PARTICIPANTS： A total of twenty healthy volunteers were selected from Beijing Geriatrics Institute National Public Health Bureau, including 10 subjects with obesity （5 males and 5 females; body mass 〉 28.0 kg/m2） and 10 subjects with normal body mass （5 males and 5 females; body mass from 18.5 to 23.9 kg/m2）. All subjects gave written informed consent before participating in the study. METHODS： fMRI study was performed on GE 1.5 T Signa Twinspeed Infinity with Excite. Each voluntee was ingested of glucose during the fMRI scan. T2＊ images were acquired using a single-shot gradient echo （EPI） technique. The parameters of EPI included： TR 3 000 ms, TE 40 ms, Flip angle 90°, field of view （FOV） 24 cm × 24 cm, thickness 5 mm, gap 0 mm, matrix 64 × 64, number of excitation 1. All 10 subjects with normal body mass underwent a repeat fMRI scan after consuming an equivalent amount o water without glucose on a separate day. The procedure for the fMRI scan with water intake was the same a for glucose ingestion. fMRI data were processed with Intensity Averaging Method. MAIN OUTCOME MEASURES： The central response of hypothalamus and feedback orientation during OGTT in different body-weighted subjects. RESULTS： An acute transient decrease of fMRI intensity in posterior inferior and anterior inferior o hypothalamus was observed in all subjects within 2 minutes after oral glucose intake. This decrease wa followed by a recovery to the baseline. However, obese subjects had a delayed intensity decrease [（1.96± 1.06） minutes vs. （1.04±0.71） minutes, t =2.14, P 〈 0.05] and longer recovery time [（26.62±7.35 minutes vs. （16.29±6.42） minutes, t =3.67, P 〈 0.01] as compared with normal body-weight subjects Furthermore, decreased fMRI intensity was significant different from baseline intensity [（5.7±2.5）% vs （14.3±5.5）%, t =2.56, P 〈 0.05] in obese subjects, but not in normal body-weight subjects. The area o hypothalamus in normal body-weight volunteers demonstrated no significant signal change before and afte oral water ingestion （P 〉 0.05）. CONCLUSION： Hypothalamus response to glucose loading is different in normal body-weighted and obes subjects. This suggests that fMRI is a useful tool to evaluate the central regulation of glucose metabolism.
文摘In this paper, the Foxconn epidemic event in Zhengzhou was taken as an example to analyze the evolution of online public opinion on public health emergencies. In order to improve the performance of online public opinion analysis, based on the life cycle theory and LDA theory, the emotional changes of Internet users in four stages of the Foxconn incident centered on the evolution of inscription were divided. The emotions of netizen speech at different stages are analyzed based on CNN-BiLSTM + Attention model, which uses Convolutional Neural Network (CNN) to extract local features. Bi-directional Long Short-Term Memory (BiLSTM) is used to efficiently extract contextual semantic features and long distance dependencies, and then combined with attention mechanism to add emotional features. Finally, Softmax classifier realizes text emotion prediction. The experimental results show that: compared with TextCNN, BiLSTM, BiLSTM + Attenion, CNN-BiLSTM model, the emotion classification model has better effects in the accuracy rate, accuracy rate, recall rate and F value. By analyzing the emotional distribution and evolution trend of public opinion under “text topic”, the paper accurately deconstructs the development characteristics of public opinion in public health emergencies, in order to provide reference for relevant departments to deal with public opinion in public health emergencies. .
基金suggestions.This research was funded by S&T Program of Hebei(No.19224205D)the Natural Science Foundation of Hebei Province(Nos.D2020403019,D2018403115)+2 种基金Science and Technology Project of Hebei Education Department(No.ZD2020134)the National Natural Science Foundation of China(Grant No.41702165)the Science and Technology Innovation Team Project of Hebei GEO University(KJCXTD2021-02).
文摘This study reveals the superimposing ecological risk of chemical form and total amount of heavy metals(HMs)and their source in the sediments of Baiyangdian Lake,also provides important scientific basis for environmental protection and sustainable development of the Xiong’an New Area.The total amount and distribution of typical HMs(As,Cd,Cr,Cu,Pb,and Zn)in the sediments of Baiyangdian Lake and its peripheral rivers were analyzed.Moreover,five chemical forms(F1−F5)of HMs in the sediments of Baiyangdian Lake were identified by an improved Tessier five-step method.Risk Assessment Coding Method(RAC)and mean sediment quality guideline quotient(SQG-Q)were used to assess ecological risk.In addition,the improved enrichment coefficient and statistical methods were used to identify the sources of HMs.The contents of HMs in the lake sediment is about 1 to 3 times the background values,with higher concentration in the central area and lower concentration in the northern and southern areas.The pH and organic matter concentrations were 6.99 to 7.28 and 3.98%to 5.69%,respectively.The chemical form of HM in the lake sediments is mainly in residue form.Ion-exchangeable form and carbonate bound form of Cd account for the highest proportion(19%to 42%and 17%to 25%,respectively);Pb and As have a higher proportion of iron and manganese oxidation form(21%to 51%and 15%to 31%,respectively);Cu and Zn have a higher proportion of organic bound form(11%to 39%and 8%to 25%,respectively).RAC indicates a high potential risk for Cd,Pb,and As,and the SQG-Q indicated a high ecological risk for As,Cr and Pb.The form and behavior of HMs,such as bioavailability and toxicity,are largely influenced by the physicochemical properties of the sediments.Organic matter and pH mainly affect the ion exchange form of HMs,while the total amount of HMs mainly affects the binding form and residual form of HMs with organic matter.Changes in the content and morphology of Cu,Zn,and Cd in Baiyangdian sediments are mainly influenced by inflow river,which are mainly from human industrial activities,such as wastewater discharge.There are various sources of HMs,such as Pb,which mainly comes from human life activities such as domestic waste,leaching,aquaculture,and tourism in Baiyangdian village,influenced by lead and natural environment and related to the spatial location of the lake;while the source of chromium is more complex.
