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目的了解华南地区某肿瘤专科医院就诊患者的艾滋病病毒（HIV）、梅毒螺旋体（TP）、丙型肝炎病毒（HCV）、乙型肝炎病毒（HBV）感染现状，分析确诊检查完成情况，为加强常见传染病管理和制定医院感染防控策略提供参考。方法对2022年华南地区某肿瘤专科医院就诊的门诊、住院患者的传染病初筛项目HIV抗原抗体联合检测（HIV-comb）、梅毒螺旋体特异抗体（Anti-TP）、丙肝抗体（Anti-HCV）、乙肝表面抗原（HBsAg）的阳性检出率及进一步完成确诊项目检查的检测率进行统计分析。结果2022年就诊患者的HIV-comb阳性率为0.07%，100%患者进一步完成HIV补充确证试验，HIV总体患病率为0.06%；Anti-TP阳性率为1.99%，100%患者进一步完成梅毒螺旋体颗粒凝集试验（TPPA）及甲苯胺红不加热血清试验（TRUST）检测，梅毒总体患病率为0.51%；Anti-HCV阳性率为0.90%，仅26.61%患者进一步完成丙肝RNA定量检测，其中26.44%患者丙肝RNA高于检出下限；HBsAg阳性率为21.06%，仅54.40%患者进一步完成乙肝DNA定量检测，其中51.60%患者乙肝DNA高于检出下限。其中，门诊疑似肝炎患者核酸检测完善率低于住院（PP

目的为了解肿瘤医院院感情况及其变化趋势，探讨肿瘤专科医院感染防控重点策略。方法通过医院感染监测系统获取中山大学肿瘤防治中心2019~2021年医院感染质量控制指标数据，采用卡方检验和趋势卡方检验对指标变化进行分析。结果2019~2021年该院院感发生率分别为0.80%、0.78%和0.57%，逐年显著下降（PPP>0.05），仍处较高水平。结论2019~2021年该肿瘤专科医院院感情况总体得到改善。呼吸系统和手术部位、产超广谱β-内酰胺酶细菌为主的多重耐药菌及三管相关感染防控是肿瘤专科医院医院感染防控工作薄弱环节，应重点推进。

为将400 Gbit/s高速率应用于超长站距无中继光传输系统,首先对400 Gbit/s双偏振-四进制正交幅度调制（DP-16QAM）及400 Gbit/s双偏振-八进制正交幅度调制（DP-64QAM）两种高阶调制码型及其对应的光信噪比（OSNR）要求进行了研究,然后通过实验研究了两种码型背靠背OSNR的要求及入纤光功率与误码率的关系,最后搭建了具有前后向拉曼放大器的400 Gbit/s超长距光传输链路,通过实验测试了两种码型对应的最远单跨传输距离。实验结果表明,400 Gbit/s DP-16QAM在G.652光纤上利用双向拉曼光放大器最远可以传输286 km,对于电力长跨距来说基本满足了大部分的应用场合。

针对下一代动态光网络,光纤长度可能根据链路需要随时变化,以及由于光纤老化造成色散参量变化等因素可能造成链路中的色散值在接收端很难提前预知,因此要求未来光网络节点中的接收端能够自适应地估计出色散值然后补偿信号。文章在光网络节点的数字相干接收机中提出了一种基于峰均值功率比的色散估计算法,并在224 Gbit/s偏振复用（PDM）-16正交振幅调制（QAM）和336 Gbit/s PDM-64QAM的多种长距离传输（400、800、1 200、1 600和2 000 km标准单模光纤（SSMF））系统中验证了其可行性及有效性。仿真结果表明,文章所提算法具有很好的色散估计精度,色散估计标准差低于100 ps/nm。该算法对偏振模色散（PDM）和偏振相关损耗（PDL）具有较强的容忍性,例如群速度时延（DGD）低于15 ps及PDL在7 dB以内时,算法都可实现很好的估计精度。同时该算法对非线性效应也具有较强的容忍性。

文章提出了一种新的应用于高速光纤通信系统接收端的数字背向传输（DBP）算法的步长变换选择方法。通过采用斜线方法对光纤非线性系数的指数形式曲线进行近似,找出使斜线的斜率与原曲线各点斜率差值最小情况下的步长,再用于变步长DBP算法中对光纤传输中的非线性损伤进行补偿。在3 200km单信道25Gbaud光纤传输系统中对所提步长选择方案进行了仿真。结果表明,在相同系统中,与其他步长选择方法相比,在最佳入纤功率时所提步长选择方案的Q值提升了0.5dB;当入纤功率越大、非线性效应越强时,所提方法对于光纤传输非线性损伤的补偿能力更好,而算法复杂度没有改变。

提出了一种基于多步插值的频偏估计算法,用于相干光通信中数字相干接收机的频偏估计补偿。该算法首先采用少量的数据点作FFT（快速傅里叶变换）,粗估计出频偏值,然后采用DFT（离散傅里叶变换）进行多步插值计算,降低了计算复杂度。在一个28GBaud的QPSK（正交相移键控）仿真系统中进行了仿真验证,结果表明,与最新报道的LS（最小二乘）算法相比,该文所提算法可以大大降低现有算法的复杂度。

提出了一种应用于双向拉曼放大超长单跨距光纤传输系统的低复杂度数字背向传输算法,该算法基于在接收端电域中反向求解薛定谔方程,可以在补偿光纤传输系统中色散的同时抑制非线性效应;基于双向拉曼放大系统对算法的功率曲线等进行了优化设计,降低了算法的复杂度;搭建了一个10Gbaud/s正交相移键控调制的双向拉曼传输实验系统,传输距离为320km。实验结果表明,优化后的数字背向传输算法的性能较传统算法提升了0.71dB。

对一种移除调制相位信息的算法进行了进一步研究,使其适用于更高阶调制格式的相干系统。该算法对接收到的复数信号的实部和虚部分别采用绝对值操作,移除调制的相位信息。通过对28GBaud的64QAM（64阶正交幅度调制）相干系统进行仿真,来研究该算法在64QAM系统中的性能。仿真结果表明,该算法无需乘法器,而且在频偏估计中的性能与传统的M次幂运算的性能接近。因此,该算法相比M次幂运算在性能不变的情况下,降低了算法的复杂度。

文章介绍了利用新型SMF-28ULL超低损耗光纤作为传输介质,使用相位啁啾、前向拉曼、增强型前向纠错（FEC）以及前置随路远程泵浦光放大（ROPA）技术,实现了2.5Gbit/s系统无中继521km的超长站距传输,这也是迄今所报道的使用前置随路ROPA技术所实现的距离最远的传输。

由因特网工程任务组（IETF）路径计算单元（PCE）工作组定义的基于PCE的多协议标签交换/通用多协议标签交换（MPLS/GMPLS）网络结构能有效解决多层网络中端到端的路径计算问题。文章从自动交换光网络（ASON）路由技术的发展趋势出发,根据有关PCE的RFC文档对PCE的体系结构、发现机制和策略进行了较为系统的说明,重点对PCE在ASON路由中的应用及PCE路径保护和恢复机制进行了阐述,表明PCE技术将成为ASON路由技术的首要选择。

TAP（Test Access Port/Traffic Access Port）是一种新兴的用于网络监测的硬件设备,它提供了一种在不中断网络正常流量的情况下,获得网络流量的方法。因此,TAP可以用来实现监测网络性能、解决网络故障、分析网络流量和阻止恶意攻击等一系列功能。文章阐述了TAP的产生背景、主要特点、工作原理及其应用。

标准化的网络节点接口信息结构是将来网络互通的基础 .同时也为各设备生产商提供了标准的规范和设计依据 .文章介绍了光传送网的分层结构和节点特征信息

对DP-QPSK（偏振复用正交相移键控）调制和相干接收技术在低速系统中的应用进行了研究,实现了2.67Gbit/s速率的实时传输。实验结果表明,DP-QPSK调制和相干接收技术对无中继ULH（超长跨距）光传输系统的OSNR（光信噪比）容限有优化作用。

针对特高压电网建设对超长距传输提出的更高要求,提出了新的技术方向——塔内光中继。分析了塔内光中继的理论依据并设计了技术方案,在哈密郑州特高压直流输电光纤通信工程石城至环县段实现了我国首个塔内光中继实验工程,工程顺利开通,运行稳定,验证了塔内光中继方案的可行性。随着我国电网建设的不断发展,塔内光中继将得到更广泛的应用。

阐述了以太网与以太网无源光网络（EPON）传输方式的本质区别,同时从物理层角度分析EPON系统对突发信号的处理,着重分析了突发模式接收机的原理和试验。分析了试验现象,给出了解决方案,同时描述了上层芯片是如何处理接收到的突发信号的。

Objective To investigate the effect of cognitive reserve (CR) on the integrity of white matter tracts in patients with white matter hyperintensities (WMH) across different cognitive stages. Methods This study prospectively enrolled the consecutive patients with WMH who were admitted in Department of Neurology, Nanjing Drum Tower Hospital from January 2017 to December 2020. All subjects underwent neuropsychological tests, cognitive reserve assessment and multimodal MRI scans. According to the MoCA score, the patients were divided into WMH with cognitive impairment (CI) group (WMH-CI) and WMH without CI group (WMH-nonCI). According to the median cognitive reserve index (CRI), the patients were further divided into WMH-CI high CR group, WMH-CI low CR group, WMH-nonCI high CR group and WMH-nonCI low CR group. The integrity of white matter tracts was measured by the fractional anisotropy (FA), a diffusion parameter of white matter tracts, which was calculated by PANDA software. The two-factor ANOVA was used to analyze the effects of cognitive status and CR level on cognitive function, brain volume and FA value of white matter tracts, and the correlation analysis of cognitive function, brain volume and FA value was performed. Results A total of 137 patients with WMH were included, including 39 subjects with WMHnonCI and low CR, 42 with WMH-nonCI and high CR, 35 with WMH-CI and low CR, and 21 with WMH-CI and high CR. The scores of MMSE (F =5.872, P =0.017), MoCA (F =19.310, P

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ecology & Rural Environment is the property of Journal of Ecology & Rural Environment Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To investigate the epidemiological characteristics and high -risk factors for chronic obstructive pulmonary disease (COPD) among residents aged 40 and above in Gansu Province, to provide reference for guiding regional COPD prevention and control efforts. Methods From May to December 2019, a multi -stage stratified cluster sampling method was used to select 1 836 residents aged 40 and above in three monitoring sites in Gansu Province: Dunhuang city, Cheng County in Longnan city, and Zhengning County in Qingyang city, and questionnaire surveys, physical examinations, and pulmonary function tests were conducted. The chi-square test was used for univariate analysis, and the high-risk factors affecting COPD were analyzed using a multivariate logistic regression model. Results The prevalence of COPD among residents aged 40 and above in Gansu Province was 11.9%. The results of the multivariate logistic regression analysis showed that compared to females and the age group of 40 to 49 years, being male (OR=2.130, 95%CZ: 1.515-2.994) and being in the age group of 60 to 69 years (OR= 2452, 95%CIi 1.533-3.922) or 70 years and above (OR=2.351, 95%CI: 1.248-4.430) were high-risk factors for COPD among residents. Compared to Dunhuang city, residing in Cheng County (0-=1.928, 95%CI: 1.321-2.815) was a high-risk factor for COPD. Having a BMI <18.5 kg/m2 was also identified as a high-risk factor for COPD, Furthermore, having simultaneous exposure to risk factors, chronic respiratory symptoms, and a personal history of chronic respiratory diseases (OR =3.481, 95%CI: 1.729-7.005) were high-risk factors for COPD among residents. Conclusion The prevalence of COPD among residents aged 40 and above in Gansu Province is relatively high. Therefore, special attention should be paid to male individuals, the elderly, individuals with low body weight, and those with simultaneous exposure to risk factors, chronic respiratory symptoms, and a personal history of chronic respiratory diseases in COPD prevention and control efforts. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Clinical Hepatology / Linchuang Gandanbing Zazhi is the property of Journal of Clinical Hepatology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Geomatics & Information Science of Wuhan University is the property of Geomatics & Information Science of Wuhan University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Study of chemical properties of water radical cations is of great significance for elucidating related reactions process. In this paper, the reaction characteristics of (H2O)2+• prepared online with several benzene derivatives were investigated. The results showed that, when (H2O)2+• reacted with aromatic compounds without electron-withdrawing groups, such as benzene (C6H6, 78 u), anisole (C7H8O, 108 u) and 2,4-dimethylaniline (C8H11N, 121 u), the corresponding phenol product ((C6H5OH) +•, m/z 94), (C7H7O−OH)+•, m/z 124) and (C8H10NOH+H)+, m/z 138)) were observed, accompanied with the production of electron transfer (ET) products (C6H6) +•, (C7H8O) +•) or proton transfer (PT) product ((C8H11N+H)+). Isotope labeling experiments proved that OH in corresponding phenol products was originated from (H2O)2+•. Interestingly, when (H2O)2+• reacted with substituted benzenes bearing strong electron-withdrawing group, such as benzonitrile (C6H5CN, 103 u) and nitrobenzene (C6H5NO2, 123 u), the main products were the radical substituted adducts (C6H5CN+ H2O)+• (m/z 121) and (C6H5NO2+H2O)+• (m/z 141), respectively, without phenol products or substituted benzene radical cation were noticed. It was obvious that the reaction between (H2O)2+• and the substrate occurred through four competing processes: (a) electron transfer (ET) reaction, in which aromatic compounds release an electron to (H2O)2+• to from an aromatic radical cation; (b) proton transfer (PT) reaction in which aromatic compounds got a proton derived from the dissociation of (H2O)2+•; (c) dissociative electron transfer (DET) reaction, accompanied with the electron transfer process, C−H bond cleavage and C−OH bond formation; (d) radical substitution reaction in which a radical cation adduct consisting of aromatic molecule and H2O generates. It was speculated that the diverse reactivity of (H2O)2+• was owe to its two interchange structures ((H2O)H+−•OH and [H2O∴OH2]+•) generates. It was proposed that the electron withdrawing groups on the aromatic ring would benefit for the existence of two-center and three-electron structure of (H2O)2+• and induced the radical substitution reaction. In contrary, compounds without electron withdrawing groups or bearing electron donating groups on the aromatic ring would contribute to the presence of proton transfer structure of (H2O)2+• (containing H+ and •OH) and facilitate the C−OH bond formation. This study will help to elucidate the chemical reaction processes involving benzene or substituted benzenes and (H2O)2+•. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Rehabilitation Medicine is the property of China Association of Rehabilitation Medicine, China-Japan Friendship Hospital and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

本研究以「警政統計查詢網」2002～2018年縣市別逐年的總合毒品犯罪率資料，分析12～23歲毒品犯罪問題並著重家庭結構與娛樂因素之影響。實證上採面板數據固定效果模型，修正可能的估計偏誤、以兩階段最小平方法修正內生性問題，並根據結果提出可供教育現場擬訂毒品防制參考之政策，以降低學生毒品成癮問題。實證結果發現，此年齡人口占比與縣市毒品犯罪率、毒品犯罪級數均有關。其他條件均相同下，12～17歲、18～23歲人口占比分別與一級毒品犯罪率以及二、三級毒品犯罪率呈正相關。12～23歲毒品犯罪行為與特殊家庭結構有關，尤其是單親家庭；與隔代教養家庭的關係較低，且視年齡別與毒品級數而定。娛樂業家數雖與18～23歲毒品犯罪有關，然關係不大；完成大學教育與緝毒的嚇阻效果對降低青年毒品犯罪率的效果很高；家庭可支配所得與12～17歲少年（女）三級毒品犯罪率亦具正相關。本研究提出幾個政策建議之核心為：針對年齡層設定與調整毒品防制重點與方法，例如除國中與小學，也應加強關注高中職與大專校院學生單親與隔代教養之情況、追蹤瞭解高中職與大學學生休學及退學的高危險群、提高鄰近高中職及大學校院娛樂場所（特別是三級毒品）之查緝與查緝頻率，以及留意家庭收入較高家庭12～17歲學生的身心狀況與異常行為。 Motivation Drugs are addictive, and their use and attendant negative consequences and externalities impose a heavy burden on society. According to the Annual Report on Drug Abuse and Inspection Statistics (Taiwan Food and Drug Administration, 2018), juvenile drug use accounted for 59.3% of schedule III drug-related crimes in 2017. Because curiosity is one of the most important factors leading to drug use, school or university campuses are key sites for young people’s drug addiction prevention. The literature on drug-related crime is mostly based on qualitative research, and this is especially so for the research conducted in Taiwan. This study analyzed data from the Statistics of Police Work (National Police Agency, Ministry of the Interior, 2002-2018) by using quantitative methods, with the aim of determining the driving forces of drug-related crime by teenagers and young people in Taiwan. We focused on the effect of household structure and entertainment venues nearby, with an aim of determining policy suggestions for drug abuse prevention in schools of various levels. The two research questions of this study were as follows: Research question 1: Would the pattern of drug-related crime in counties in Taiwan be related to the youth population structure? Research question 2: Would household structure and entertainment venues be crucial factors on the drug-related crime rate for teenagers and young people in Taiwan? What other factors would be significant? Literature Review The reasons for drug-related crimes are many, ranging from an individual’s early experiences in childhood and adolescence to their living environment, social pressure, and economic status. The drug-related crime literature, hence, comes from both natural and social sciences, thus revealing its interdisciplinary character. The theory of lower-class culture conflict, for instance, proposes that crime is a natural response of individuals from a lower-class culture to the environment (Miller, 1958). The general strain theory of crime and delinquency states that the causes of crime include psychological factors, such as stress and anxiety, which means that middle- or upper-class people may also commit crimes (Agnew, 1992). Crime may also reflect people’s choices, however. Becker (1968) proposed that when the expected reward from crime is higher than the pay received in legal employment (particularly when unemployed), the probability of choosing to commit a crime increases. Even employed persons may engage in illegal activities, as long as the utility obtained by crime is higher than that from employment (Grogger, 1998; Raphael & Winter-Ebmer, 2001). Moreover, a larger police force, representing a higher probability of being arrested, may lower criminal inclinations (Levitt, 1997; Marvell & Moody, 1996). Relevant research has suggested that the living environments and family backgrounds of young drug offenders tend to be similar: they typically have weak relationships with their families, have peers who are drug users, and have low academic achievement (Robertson et al., 2003; Shu et al., 2015). Youth drug-related crime may be related to weak social bonds (Lin et al., 2001), echoing social control theory (Hirschi, 1969). Crime may also be caused by the attitudes and values of people, with these being transferred from generation to generation (Miller, 1958). The accessibility of drugs, for instance, at large-scale music festivals and entertainment venues, and opportunities to commit crimes and other antisocial behaviors may be critical influential factors among the young (Chin, 2018; Day et al., 2018; Tossmann et al., 2001). Research Methods Fixed-effects models for panel data were employed for empirical analysis, and panel data estimation bias was corrected. In addition, the causal relationship between the drug-related crime rate and unemployment was considered (Lin, 2008; Lin & Liu, 2006; Raphael & Winter-Ebmer, 2001). The Durbin-Wu-Hausman test was used to test for overidentification, and if an endogenous problem was identified, the two-stage least squares method with clustered standard errors was used to obtain consistent estimates. Results • The schedule II drug-related crime rate of young people aged 12-23 exhibited a rapid increase. Among those aged 18-23, with other factors remaining constant, our data indicated an average increase of 98.68 people per year in a county committing a crime. • The schedules I and III drug-related crime rates were positively related to the proportion of the population aged 12-17 and 18-23, respectively. • Based on the coefficient estimates, for every 1% increase in the proportion of single-parent families, the schedules II and III drug-related crime rates of 12-17 and 18-23-year-old individuals increased by 39.25 (113.03), and 23.81 (25.92) people, respectively. • Grandparent family positively correlated with the schedule III drug-related crime rate of 18-23-year-old individuals, with a large estimated coefficient (130.95), compared with otherwise similar young people. • The estimated coefficient of attendance at music festivals for the schedule II crime rate for those aged 12-17 was 10.34. A significant relationship between the number of entertainment venues and the number of schedule III drug offenses of people aged 18-23 was observed. • The drug-related crime rate of youths aged 12-17 slightly increased with household income, especially for the schedule III drug-related crime rate, which includes drugs that are not easily recognized and can be easily consumed, such as ketamine and FM2. • An increase in the proportion of the educated population in counties by 1% can significantly reduce the schedule III drug-related crime rate of young people aged 18-23 by 45.99 people per year. • Every 1% increase in the number of antinarcotics personnel was found to reduce the schedule III drug-related crime rate of young people aged 12-17 and 18-23 by 366.52 and 505.05 people per year, respectively. Discussion The empirical results indicate that the drug-related crime rate of a county is associated with the proportion of the population aged 12-23 and that the drug-related crime rate varies across the four schedules of drugs. With other factors remaining constant, the more youths aged 12-17 (aged 18-23) are in the population, the higher the schedule I (schedule II, and III) drug-related crime rates are. The causes of drug-related crime for adolescents seem to differ from those for adults. Living in a single-parent family is a significant explanatory variable for the drug-related crime rate of young people aged 12-23, especially for crimes relating to schedule II and III drugs among young people aged 18-23. Grandparent family is significantly related to the schedule III drug-related crime rate of people aged 18-23, and the impact of grandparent family depends on a young person’s age and the drug schedule. The presence of entertainment venues nearby is an important factor for drug-related crime only for people aged 18-23, with a small effect. The percentage of educated people in a county and the number of antinarcotics police officers have a negative relationship with the drug-related crime rate of people aged 18-23. Household disposable income is also a factor for drug-related crime among those aged 12-17. Policy Suggestions We propose several policy suggestions based on the findings: • Revising policies for drug abuse prevention according to age and making this the top priority for schools of all levels. • Giving more attention to young people from single-parent families in senior high schools and colleges as well as in primary schools and junior high schools. • Paying special attention to the situation of students raised by grandparents and to those at higher risk of dropping out of school, especially in senior high schools and colleges. • Enhancing drug policing in entertainment venues near senior high schools and colleges. • Continuing to monitor the physical and mental health of children from families with higher socioeconomic status.

Objective: To investigate the analgesic effect and mechanism of percutaneous acupoint electrical stimulation combined with routine analgesia on uterine contraction pain after painless abortion. Methods: 100 patients were selected to receive painless abortion in our hospital. According to random number table method who were divided into two groups. The control group received routine postoperative analgesia treatment, and at the same time, electrodes were affixed to the most acid swelling of Neiguan, Hegu and Sanyin Jiao, but acupuncture point stimulation was not possible. The observation group was treated with percutaneous acupoint electrical stimulation on the basis of routine postoperative analgesia. The general body conditions of the two groups at different time points, the pain and pain of the two groups at different time points, the score of positive and negative emotion scale at T3, the level of serum substance P, prostaglandin, 5-hydroxytryptamine, β-endorphin and dykephalin at T3, the score of psychological state and the score of satisfaction at T4 were compared. Results: The BP, HR, RR, SpO2, at T1 and T2 points in control group were significantly lower than TO points in the same group, and there was no statistical significance in BP, HR, RR, SpO2 at T3 points in control group and TO points in observation group (P > 0.05) BP, HR, RR and SpO2, in control group were significantly lower than those in observation group at T1 and T2 (P < 0.05) At TO, there was no statistical significance in VAS scores between the two groups (P > 0.05) At T1, T2 and T3 points, VAS scores in the observation group were significantly lower than those in the control group (P < 0.05) The VAS scores at T1 and T2 points in the control group were significantly higher than those at T0 points in the same group, and the VAS scores at T1, T2 and T3 points in the observation group were significantly lower than those at T0 points (P < 0.05) The positive emotion of the observation group was significantly higher than that of the control group, and the negative emotion was significantly lower than that of the control group (P < 0.05) The serum levels of Substance P, prostaglandin, 5-hydroxytryptamine, β-endorphin and dynorphin in the observation group were significantly lower than those in the control group (P<0.05). The psychological status score of the observation group was significantly lower than control group, and the satisfaction score was significantly higher than control group (P<0.05). Conclusion: Percutaneous acupoint electrical stimulation combined with routine analgesia can significantly improve the analgesic effect, psychological state and satisfaction of patients after painless abortion, which may be related to the reduction of serum substance P, prostaglandin, 5-hydroxytryptamine, β-endorphin and dynorphin levels. [ABSTRACT FROM AUTHOR]

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Objective PESA and terpolymer were used as the primary raw materials for formulation screening in the research and development process of phosphorus-free corrosion and scale inhibitors. Methods The adaptability of phosphorus-free corrosion and scale inhibitors were evaluated and studied through the corrosion test and static scale inhibition tests. Results It was further applied to the circulating water system of a natural gas purification plant in Sichuan and Chongqing. Through field monitoring, the non-phosphorus corrosion and scale inhibitor achieved good corrosion and scale inhibition effect, and the corrosion rate was controlled below 0.075 mm/a. Meanwhile, the bacteria numbers in circulating water were counted before and after the test. The results showed a trend of continuous decrease, and the eutrophication degree of water was reduced, indicating that the phosphorus-free formula had a positive effect on the bacterial control of the system. Conclusion The laboratory study and field test results confirm that the screened corrosion and scale inhibitor system has excellent effect in water with medium and low levels of hardness and can guarantee the stable operation of the circulating water system in natural gas purification plant. [ABSTRACT FROM AUTHOR]

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Copyright of Chinese Journal of High Pressure Physics is the property of Chinese Journal of High Pressure Physics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

: In order to resolve the issues of large size gap, serious occlusion and overlapping images in the objection detection research of bus passenger flow, an improved object detection model YOLOv5s_P is proposed. Methods: The PANet structure in YOLOv5 model is replaced with the BiFPN structure to strengthen features information of different scales maps in order to extract complex target features. At the same time, Mixup data augmentation method is used to increase the training samples of occlusion and overlapping images to improve model generalization capabilities and to reduce the detection errors caused by the fragmentation of passenger flow images. In order to verify the performance of the YOLOv5s_P model, it is compared with four other models: Faster R-CNN, SSD300, RetinaNet and YOLOv5s to detect bus passenger flow in real bus scenario, in which the image sets are labeled to detect the upper body of the human instead of the head. Results: Experimental results show that the average accuracy of YOLOv5s_P model reached 96.9% without affecting the detection speed, and the average missed detection rate was reduced by 3.43% compared with YOLOv5s model, which improved the detection accuracy of bus passenger flow. Conclusions: In the future, research will be integrated with the attention mechanism to further improve the detection accuracy, and combined with the tracking algorithm to solve the problem of the bus passengers number fluctuation. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Data Acquisition & Processing / Shu Ju Cai Ji Yu Chu Li is the property of Editorial Department of Journal of Nanjing University of Aeronautics & Astronautics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Evaluation & Analysis of Drug-Use in Hospitals of China is the property of Evaluation & Analysis of Drug-Use in Hospitals of China Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of South China Fisheries Science is the property of South China Fisheries Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Purpose: Through reviewing an education policy blueprint in Norway, titled “An Offer of Homework Assistance” (issued by the Norwegian Directorate for Education and Training in June 2010), the present article aims to shed light on how Norway uses education as an arena to realize social equality and equity. Design/Approach/Methods: This is an analytical policy review. Findings: By examining the background, goals, contents, and implementation of the homework assistance program, we have found that the Norwegian government institutes evidence-based policies in education. Although there is criticism concerning the policy and its implementation, empirical evaluative investigations have found that it brings a variety of benefits. Originality/Value: The present article is useful to understand educational policymaking in Norway and how the country is making efforts to achieve social equality and equity through education.

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