Predicting the Popularity of Online News Based on the Dynamic Fusion of Multiple Features

Predicting the popularity of online news is essential for news providers and recommendation systems.Time series,content and meta-feature are important features in news popularity prediction.However,there is a lack of exploration of how to integrate them effectively into a deep learning model and how effective and valuable they are to the model’s performance.This work proposes a novel deep learning model named Multiple Features Dynamic Fusion(MFDF)for news popularity prediction.For modeling time series,long short-term memory networks and attention-based convolution neural networks are used to capture long-term trends and short-term fluctuations of online news popularity.The typical convolution neural network gets headline semantic representation for modeling news headlines.In addition,a hierarchical attention network is exploited to extract news content semantic representation while using the latent Dirichlet allocation model to get the subject distribution of news as a semantic supplement.A factorization machine is employed to model the interaction relationship between metafeatures.Considering the role of these features at different stages,the proposed model exploits a time-based attention fusion layer to fuse multiple features dynamically.During the training phase,thiswork designs a loss function based on Newton’s cooling law to train the model better.Extensive experiments on the real-world dataset from Toutiao confirm the effectiveness of the dynamic fusion of multiple features and demonstrate significant performance improvements over state-of-the-art news prediction techniques.

Deep Learning Model for News Quality Evaluation Based on Explicit and Implicit Information

Recommending high-quality news to users is vital in improving user stickiness and news platforms’reputation.However,existing news quality evaluation methods,such as clickbait detection and popularity prediction,are challenging to reflect news quality comprehensively and concisely.This paper defines news quality as the ability of news articles to elicit clicks and comments from users,which represents whether the news article can attract widespread attention and discussion.Based on the above definition,this paper first presents a straightforward method to measure news quality based on the comments and clicks of news and defines four news quality indicators.Then,the dataset can be labeled automatically by the method.Next,this paper proposes a deep learning model that integrates explicit and implicit news information for news quality evaluation(EINQ).The explicit information includes the headline,source,and publishing time of the news,which attracts users to click.The implicit information refers to the news article’s content which attracts users to comment.The implicit and explicit information affect users’click and comment behavior differently.For modeling explicit information,the typical convolution neural network(CNN)is used to get news headline semantic representation.For modeling implicit information,a hierarchical attention network(HAN)is exploited to extract news content semantic representation while using the latent Dirichlet allocation(LDA)model to get the subject distribution of news as a semantic supplement.Considering the different roles of explicit and implicit information for quality evaluation,the EINQ exploits an attention layer to fuse them dynamically.The proposed model yields the Accuracy of 82.31%and the F-Score of 80.51%on the real-world dataset from Toutiao,which shows the effectiveness of explicit and implicit information dynamic fusion and demonstrates performance improvements over a variety of baseline models in news quality evaluation.This work provides empirical evidence for explicit and implicit factors in news quality evaluation and a new idea for news quality evaluation.

Incidence and mortality rate of esophageal cancer has decreased during past 40 years in Hebei Province,China

Background： Hebei province is located in North of China with of approximately 6% of whole national population. It is known as a high-risk area for esophageal cancer in China and worldwide. The aim of our study was to estimate the esophageal cancer burden and trend in Hebei Province. Methods： Eight cancer registries in Hebei Province submitted cancer registry data to the Hebei Provincial Cancer Registry Center. All data were qualified and compiled for cancer statistics in 2011. The pooled data were stratified by gender and age group （0, 1-4, 5-9, 10-14...80＋）. Incidence and mortality rates were age-standardized to World Segi＇s population standard and expressed per 100,000 persons. In addition, proportions and cumulative incidence/mortality rates for esophageal cancer were calculated. Esophageal cancer mortality data during the periods 1973-1975, 1990-1992, and 2004-2005 were extracted from the national death surveys. Mortality and incidence rate data from Cixian and Shexian were obtained from population-based cancer registries in each county. Results： The estimated number of newly diagnosed esophageal cancer cases and deaths in 2011 in Hebei Province was 24,318 and 18,226, respectively. The crude incidence rate of esophageal cancer was 33.37/100,000 （males, 42.18/100,000 and females, 24.31/100,000）. The age-standardized rate by world standard population （ASRW） was 28.09/100,000, ranking third among all cancers. The esophageal cancer mortality rate was 25.01/100,000 （males, 31.40/100,000 and females, 18.45/100,000）, ranking third in deaths among all cancers. The mortality rates of esophageal cancer displayed a significant decreasing trend in Hebei Province from 1973-1975 （ASRW =48.69/100,000） to 2004-2005 （ASRW =28.02/100,000）, with a decreased rate of 42.45%. In Cixian, the incidence of esophageal cancer decreased from 250.76/100,000 to 106.74/100,000 in males and from 153.86/100,000 to 75.41/100,000 in females, with annual percentage changes （APC） of 2.13 and 2.16, while the mortality rates declined with an APC of 2.46 for males and 3.10 for females from 1988 to 2011. In Shexian, the incidence rate decreased from 116.90/100,000 to 74.12/100,000 in males and from 46.98/100,000 to 40.64/100,000 in females, while the mortality rates declined, with an APC of 4.89 in males from 2003 to 2011. Conclusions： Although the incidence and mortality rates of esophageal cancer remain high, an obvious decreasing trend has been observed in Hebei Province, as well as in high-risk regions, such as Cixian and Shexian, over the past 40 years.

Annual cost of illness of stomach and esophageal cancer patientsin urban and rural areas in China： A multi-center study

Objective： Stomach and esophageal cancer are imposing huge threats to the health of Chinese people whereasthere were few studies on the financial burden of the two cancers.Methods： Costs per hospitalization of all patients with stomach or esophageal cancer discharged betweenSeptember 2015 and August 2016 in seven cities/counties in China were collected, together with their demographicinformation and clinical details. Former patients in the same hospitals were sampled to collect information onannual direct non-medical cost, indirect costs and annual number of hospitalization. Annual direct medical cost wasobtained by multiplying cost per hospitalization by annual number of hospitalization. Annual cost of illness （ACI）was obtained by adding the average value of annual direct medical cost, direct non-medical cost and indirect cost,stratified by sex, age, clinical stage, therapy and pathologic type in urban and rural areas. Costs per hospitalizationwere itemized into eight parts to calculate the proportion of each part. All costs were converted to 2016 US dollars（1 USD：6.6423 RMB）.Results： Totally 19,986 cases were included, predominately male. Mean ages of stomach cancer and urbanpatients were lower than that of esophageal cancer and rural patients. ACI of stomach and esophageal cancerpatients were $10,449 and $13,029 in urban areas, and $2,927 and $3,504 in rural areas, respectively. Greater ACIwas associated with male, non-elderly patients as well as those who were in stage I and underwent surgeries.Western medicine fee took the largest proportion of cost per hospitalization.Conclusions： The ACI of stomach and esophageal cancer was tremendous and varied substantially among thepopulation in China. Preferential policies of medical insurance should be designed to tackle with this burden andfurther reduce the health care inequalities.

中国河北省磁县1983年至2015年上消化道癌死亡率趋势分析

目的:分析中国河北省磁县33年间上消化道癌死亡率变化情况,为肿瘤防治提供依据。方法:按照肿瘤登记规范,收集整理磁县肿瘤登记处1983年1月1日至2015年12月31日肿瘤登记资料,评价上消化道癌死亡率变化情况,分析上消化道癌死亡率变化趋势。计算粗发病率、中国标准化死亡率和世界标准化死亡率的变化百分比,配合调整率的线性回归模型,估计死亡率的年度变化百分比(annual percent change,APC),结合Joinpoint线性回归分析年份及年龄组死亡率转折点及变化趋势。结果:磁县33年间上消化道癌平均粗死亡率为119.31/10万,其中男性为149.21/10万,女性为88.40/10万;中国标准化死亡率为160.85/10万,其中男性为227.00/10万,女性为108.07/10万;世界标准化死亡率为162.39/10万,其中男性为228.52/10万,女性为109.30/10万。结论:上消化道癌死亡率呈下降趋势,仍居于磁县恶性肿瘤死亡率的首位,年龄组死亡率随年龄的升高而升高。

DNA image cytometry test for primary screening of esophageal cancer: a population-based multi-center study in high-risk areas in China

Objective： To evaluate the feasibility of DNA image cytometry （DNA-ICM） as a primary screening method for esophageal squamous cell cancer （ESCC）. Methods： A total of 5,382 local residents aged 40-69 years from three high-risk areas in China （Linzhou in Henan province, Feicheng in Shandong province and Cixian in Hebei province） from 2008 to 2011 were recruited in this population-based screening study. And 2,526 subjects declined to receive endoscopic biopsy examination with Lugol＇s iodine staining, while 9 and 815 subjects were excluded from liquid-based cytology and DNA-ICM test respectively due to slide quality. Finally, 2,856, 5,373 and 4,567 subjects were enrolled in the analysis for endoscopic biopsy examination, liquid-based cytology and DNA-ICM test, respectively. Sensitivity （SE）, specificity （SP）, negative predictive values （NPV） and positive predictive values （PPV） as well as their 95% confidence intervals （95% CI） for DNA-ICM, liquid-based cytology and the combination of the two methods were calculated. Receiver operating characteristic （ROC） curves were applied to determine the cutoff point of DNA-ICM for esophageal cancer. Results： DNA-ICM results were significantly correlative with esophageal cancer and precancer lesions （X2= 18.016, P〈0.001）. The cutoff points were 5,802, 5,803 and 8,002 based on dissimilar pathological types of low grade intraepithelial neoplasia （LGIN）, high grade intraepithelial neoplasia （HGIN）, and ESCC, respectively, and 5,803 was chosen in this study considering the SE and SP. The SE, SP, PPV, NPV of DNA-ICM test （cutoff point 5,803） combined with liquid-based cytology [threshold atypical squamous cells of undetermined significance （ASCUS）] were separately 72.1% （95% CI： 70.3%-73.9%）, 43.3% （95% CI. 41.3%-45.3%）, 22.8% （95% CI： 21.1%-24.5%） and 87.0% （95% CI： 85.7%-88.3%） for LGIN, 85.7% （95% CI： 84.3%-87.1%）, 41.3% （95% CI： 39.3%-43.3%）, 4.6% （95% CI： 3.8%-5.4%） and 98.9% （95% CI： 98.5%-99.3%） for HGIN, and 96.0% （95% CI： 95.2%-96.8%）, 40.8% （95% CI： 38.8%-42.8%）, 1.7% （95% CI： 1.2%-2.2%） and 99.9% （95% CI： 99.8%-100.0%） for ESCC. Conclusions： It is possible to use DNA-ICM test as a primary screening method before endoscopic screening for esophageal cancer.

脊柱转移瘤的外科治疗进展

骨是肿瘤继肺、肝之后第三大转移部位。随着相关学科的发展、多学科治疗模式的推进,尤其是靶向药物和免疫药物取得的进展,肿瘤患者生存期逐渐延长,出现骨转移概率逐渐增大,尤其是脊柱转移,严重影响患者的生活质量和预后。有关脊柱转移瘤的治疗,近年临床研究取得了较大的进展,治疗模式不断发生变化。在外科治疗方面,外科手术微创化,影像导航下的内镜手术或机器人协助下的微创手术逐渐成为未来发展的趋势。

Simulation and energy performance assessment of CO_2 removal from crude synthetic natural gas via physical absorption process

The paper presents an energy performance assessment of CO2 removal for crude synthetic natural gas （SNG） upgrade by Selexol absorption process. A simplified process simulation of the Selexol process concerning power requirement and separation performance was developed. The assessment indicates that less pressure difference between crude SNG and absorption pressure favors the energy performance of CO2 removal process. When both crude SNG and absorption pressures are 20 bar, CO2 removal process has the best energy performance. The optimal specific power consumption of the CO2 removal process is 566 kJ/kgCO2. The sensitivity analysis shows that the CO2 removal efficiency would significantly influence the total power consumption of the removal process, as well as higher heating value （HHV） and CO2 content in SNG. However, the specific power consumption excluding crude SNG and SNG compressions changes little with the variance of CO2 removal efficiency. If by-product CO2 is compressed for CO2 capture, the process would turn into a CO2-sink for the atmosphere. Correspondingly, an increase of 281 kJ/kgCO2 in specific power consumption is required for compressing the separated CO2.

The Relationship between a Cohort Endoscopic Screening of 15,000 Subjects and the Death of Patients with Esophageal and Gastric Cancers in High-Risk Areas

OBJECTIVE Ci-xian County is located in the north of Chinaand is a high-risk area for esophageal cancer(EC).In 2004,theincidence rate of EC in the county was 127/100,000 and 93/100,000in the male and female population,respectively,and that ofgastric cancer(GC)was 72/100,000 and 36/100,000.Since 2001 acohort screening,supported by a special national fund,utilizingendoscopic examination with iodine staining for the targetpopulation at the age ranging from 40 to 69 years was carried out,so as to reduce the incidence and mortality rates in the high-riskareas of EC.METHODS In October 2001,4 townships in the Ci-xian County,Hebei,China were selected,with 22,016 cases in the interventiongroup(IVG)and 33,410 in the control group(CG).The totalpopulation coverage reached 55,000.There were 3257 males and3339 females in the IVG with the age ranging from 40 to 69 years,and 4299 males and 4430 females in the CG with the same rangeof the age.Endoscopic screening with iodine staining was used inthe IVG,with a screening rate of 53.2%.During the screening byendoscopic examination,97 cases were found to have esophagealsquamous epithelium,carcinoma-in-situ at the cardiac glandularepithelium or intra-mucosal carcinoma.Additionally,102cases were identified to have severe atypical hyperplasia in theesophagus and gastric cardia.The natural incidence rate of cancerand the mortality were observed in the CG.The ICD-0 version wasused in the tumor incidence and death registration coding.Duringa period from June to September 2008,based on the information ofthe tumor registration database of the incidence and mortality inthe Ci-xian County,the cohort groups were studied and followed.RESULTS There were 133 patients with untreatable EC and48 with GC in the IVG,while there were 259 and 37 patients inthe CG who died of esophageal and gastric cancer,respectively.The relative risk(RR)of death was 0.76 in the male patients withEC,95%CI(0.59-0.98),P=0.038,and in the female patients theRR was 0.51,95%CI(0.35-0.75),P=0.000.The RR of death in theGC patients was 2.45,(1.40-4.29)in the male,P=0.01,and 0.99,(0.47-1.99),in the female cases,P=0.906.CONCLUSION Six years after a cohort screening of a largepopulation by endoscopic examination with iodine staining inareas at high risk for EC,the death risk in the male and femalepatients with EC has decreased compared with that in the controlgroup.The difference between the 2 groups was statisticallysignificant.However,no protective method used to decrease thedeath risk in GC patients has been found during this period ofendoscopic screening.

Improved esophageal squamous cell carcinoma screening effectiveness by risk-stratified endoscopic screening:evidence from high-risk areas in China

Background:Risk-stratified endoscopic screening(RSES),which offers endoscopy to those with a high risk of esophageal cancer,has the potential to increase effectiveness and reduce endoscopic demands compared with the universal screening strategy(i.e.,endoscopic screening for all targets without risk prediction).Evidence of RSES in high-risk areas of China is limited.This study aimed to estimate whether RSES based on a 22-score esophageal squamous cell carcinoma(ESCC)risk prediction model could optimize the universal endoscopic screening strategy for ESCC screening in high-risk areas of China.Methods:Eight epidemiological variables in the ESCC risk prediction model were collected retrospectively from 26,618 individuals aged 40-69 from three high-risk areas of China who underwent endoscopic screening betweenMay 2015 and July 2017.The model’s performance was estimated using the area under the curve(AUC).Participants were categorized into a high-risk group and a low-risk group with a cutoff score having sensitivities of both ESCC and severe dysplasia and above(SDA)at more than 90.0%.Results:The ESCC risk prediction model had an AUC of 0.80(95% confidence interval:0.75-0.84)in this external population.We found that a score of 8(ranging from 0 to 22)had a sensitivity of 94.2% for ESCC and 92.5% for SDA.The RSES strategy using this threshold score would allow 50.6% of endoscopies to be avoided and save approximately US$0.59 million compared to universal endoscopic screening among 26,618 participants.In addition,a higher prevalence of SDA(1.7%vs.0.9%),a lower number need to screen(60 vs.111),and a lower average cost per detected SDA(US$3.22 thousand vs.US$5.45 thousand)could have been obtained by the RSES strategy.Conclusions:The RSES strategy based on individual risk has the potential to optimize the universal endoscopic screening strategy in ESCC high-risk areas of China.

Technical assessment of synthetic natural gas (SNG) production from agriculture residuals

This paper presents thermodynamic evaluations of the agriculture residual-to-SNG process by thermochemical conversion, which mainly consists of the interconnected fluidized beds, hot gas cleaning, fluidized bed methanation reactor and Selexol absorption unit. The process was modeled using Aspen Plus soft-ware. The process performances, i.e., CH4 content in SNG~ higher heating value and yield of SNGexergy efficiencies with and without heat recovery, unit power consumption, were evaluated firstly. The results indicate that when the other parameters remain unchanged, the steam-to-biomass ratio at carbon boundary point is the optimal value for the process. Im proving the preheating temperatures of air and gasifying agent is beneficial for the SNG yield and exergy effi ciencies. Due to the effects of COz removal efficiency, there are two optimization objectives for the SNG produc tion process： （I） to maximize CH4 content in SNC or （II） to maximize SNG yield. Further, the comparison among different feedstocks indicates that the decreasing order of SNG yield is： corn stalk 〉 wheat straw 〉 rice straw. The evaluation on the potential of agriculture-based SNG shows that the potential annual production of agriculture re sidual-based SNG could be between 555 108 - 611 108 m3 with utilization of 100% of the available unexplored resources. The agriculture residual-based SNG could play a significant role on solving the big shortfall of China＇s natural gas supply in future.