基于多维度的数据挖掘技术在调度系统中的应用

传统调度系统缺乏有效的预警机制,影响系统运行,为此提出基于多维度的数据挖掘技术在调度系统中的应用方法。首先,构建调度系统的数据库。其次,运用数据挖掘技术对数据进行处理和分析,为调度系统的事故预警提供重要的数据支持。最后,进行实验分析。实验结果表明,该方法具有较高的精准度,能够帮助相关人员更有效地执行电力调度方案。

ABCC8 is correlated with immune cell infiltration and overall survival in lower grade glioma

ATP binding cassette subfamily C member 8(ABCC8)encodes a protein regulating the ATP-sensitive potassium channel.Whether the level of ABCC8 mRNA in lower grade glioma(LGG)correlates with immune cell infiltration and patient outcomes has not been evaluated until now.Comparisons of ABCC8 expression between different tumors and normal tissues were evaluated by exploring publicly available datasets.The association between ABCC8 and tumor immune cell infiltration,diverse gene mutation characteristics,tumor mutation burden(TMB),and survival in LGG was also investigated in several independent datasets.Pathway enrichment analysis was conducted to search for ABCC8-associated signaling pathways.Through an online database,we found that ABCC8 expression in LGG was lower than in normal tissues.Then,the association of ABCC8 expression and immune cell infiltration in LGG was discussed.As we expected,the ABCC8 mRNA levels were negatively associated with non-T immune cell infiltration levels in all datasets.Consistently,TCGA_LGG RNA-seq data revealed that ABCC8 downregulated several non-T immune cell-associated signaling pathways in gene set enrichment analysis.Different ABCC8 expression groups showed diverse gene mutation characteristics and TMB.The high expression of ABCC8 was linked to improved survival of LGG patients.A pathway enrichment analysis of ABCC8-associated genes indicated that the GABAergic synapse signaling pathway might be involved in regulating immunity in LGG.Our findings show that ABCC8 reflects LGG tumor immunity and is an ideal prognostic biomarker for LGG.

企业社会责任与组织韧性

Wang和Tong(2020)在其文章中总结了企业社会责任领域的最新研究进展,并提出了未来研究方向,这对于深化企业社会责任研究有着重要的指导价值。本文则沿着这一思路结合“组织韧性”这一概念展开探讨,提出“利他型社会责任”是企业构建高韧性组织的重要路径,以期拓展企业社会责任这一领域的研究。

The Use of Floss in Medical Faculties of Inner Mongolia Medical University in 2017

Purpose: The aim of the present study was to determine the degree of using floss and the demographic characteristics of medical faculties of Inner Mongolia Medical University. Materials and Methods: Participants completed the questionnaire in the classroom. These participants came from the medical faculties of Chinese Medicine and Western Medicine. These participants were interviewed to determine the demographic characteristics. Non-flossors responded according to their reasons for not flossing. Results: A total of 3481 effective data were available for analysis. The floss prevalence was 17.21%, which was lower by 5.72% for students living in rural areas, when compared to students living in urban areas. The largest proportion of non-flossing participants in rural areas answered, “I do not know what a floss is”, while participants in urban answered, “I do not want to use it”. The largest proportion of answered flossing frequency was less than once a month. Conclusion: The present study indicates that the prevalence of using floss in medical faculties in Inner Mongolia Medical University was higher, when compared to that in Sichuan province, China, but lower than that in other countries. Although the students use floss, more than one-third of students use floss less than once a month, which is close to “never”. The prevalence in rural areas is lower than those in urban areas. Male not only comprises the total number of prevalence, but also has a frequency greater than that in females. The emphasis on using floss should be improved in medical students.

认知行为压力管理对青年乳腺癌术后患者复发恐惧的影响研究

目的探讨认知行为压力管理对缓解青年乳腺癌术后患者复发恐惧的作用。方法采用方便抽样法,选取2021年1-7月于我院乳腺外科就诊的乳腺癌患者90例为研究对象。根据随机数字表将其分为干预组和对照组各45例。对照组采用常规护理方式,干预组在常规护理基础上给予8周认知行为压力管理。采用一般情况调查表、癌症患者恐惧疾病进展简化量表(FoP-Q-SF量表)、中文版知觉压力量表(CPSS)、积极心理资本问卷(PPQ)评估干预效果。结果干预前2组患者一般资料、复发恐惧水平、知觉压力及心理资本得分差异均无统计学意义(P>0.05);训练8周后,干预组患者的复发恐惧、知觉压力总分及各维度得分显著低于对照组,心理资本得分明显高于对照组,差异均有统计学意义(P<0.05)。结论认知行为压力管理可有效降低青年乳腺癌术后患者的复发恐惧及压力水平,提高其心理资本水平。

直流微网的大信号稳定性分析及有源阻尼补偿方法

直流微网中,多种电力电子变换器通过不同的控制方式与直流母线相连接。其中有一类功率变换器表现为恒功率负载特征,呈现负阻抗和非线性特性,对直流微网的稳定性产生不利影响。针对含多个恒功率负载的直流微网大信号稳定性问题,该文搭建含多个恒功率负载的直流微网模型,利用T-S模糊模型法对直流微网的渐近稳定域进行估计。为了改善直流微网的稳定性,提高其渐近稳定域,引入了有源阻尼补偿。通过分析和比较在不同位置引入有源阻尼补偿对直流微网渐近稳定域的提升作用,得到最佳有源阻尼补偿位置。最后,通过仿真和RTLAB硬件在环实验对理论分析和有源阻尼补偿方法的有效性进行验证。

Reductive acid leaching of valuable metals from spent lithium-ion batteries using hydrazine sulfate as reductant

Hydrazine sulfate was used as a reducing agent for the leaching of Li,Ni,Co and Mn from spent lithium-ion batteries.The effects of the reaction conditions on the leaching mechanism and kinetics were characterized and examined.97%of the available Li,96%of the available Ni,95%of the available Co,and 86%of the available Mn are extracted under the following optimized conditions:sulfuric acid concentration of 2.0 mol/L,hydrazine sulfate dosage of 30 g/L,solid-to-liquid ratio of 50 g/L,temperature of 80℃,and leaching time of 60 min.The activation energies of the leaching are determined to be 44.32,59.37 and 55.62 k J/mol for Li,Ni and Co,respectively.By performing X-ray diffraction and scanning electron microscopy in conjunction with energy dispersive X-ray spectroscopy,it is confirmed that the main phase in the leaching residue is MnO2.The results show that hydrazine sulfate is an effective reducing agent in the acid leaching process for spent lithium-ion batteries.

Regeneration of Al-doped LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode material by simulated hydrometallurgy leachate of spent lithium-ion batteries

A uniform Al-doped LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode material was prepared using a coprecipitation method to take advantage of the positive effect of Al on regenerated NCM(Ni,Co,Mn)cathode materials and ameliorate cumbersome and high-cost impurity removal processes during lithium-ion battery recycling.When the Al^(3+) content in the leachate was 1 at.%with respect to the total amount of transition metals(Ni,Co,and Mn),the produced Al-doped NCM cathode material increased concentrations of lattice oxygen and Ni^(2+).The initial specific capacity at 0.1C was 167.4 mA·h/g,with a capacity retention of 79.1%after 400 cycles at 1C.Further,this Al-doped sample showed improved rate performance and a smaller electrochemical impedance.These findings provide a reference for developing industrial processes to resynthesize cathode materials with improved electrochemical performance by incorporating Al^(3+) impurities produced during lithium-ion battery recycling.

Sb_(2)S_(3) nanorods/porous-carbon composite from natural stibnite ore as high-performance anode for lithium-ion batteries

To avoid the high purity reagents and high energy consumption involved in the manufacturing of lithium-ion battery anode materials,Sb_(2)S_(3) nanorods/porous-carbon anode was prepared by remodeling natural stibnite ore with porous carbon matrix via a simple melting method.Due to the nanostructure of Sb_(2)S_(3) nanorods and synergistic effect of porous carbon,the Sb_(2)S_(3) nanorods/porous-carbon anode achieved high cyclic performance of 530.3 mA·h/g at a current density of 100 mA/g after 150 cycles,and exhibited a reversible capacity of 130.6 mA·h/g at a high current density of 5000 mA/g for 320 cycles.This shows a great possibility of utilizing Sb_(2)S_(3) ore as raw material to fabricate promising anodes for advanced lithium-ion batteries.

Preparation of Sb2O3/Sb2S3/FeOOH composite photoanodes for enhanced photoelectrochemical water oxidation

A novel Sb2O3/Sb2S3/FeOOH photoanode was fabricated via a simple solution impregnation method along with chemical bath deposition and post-sulfidation.The X-ray diffractometry,Raman measurement,and X-ray photoelectron spectroscopy show that the Sb2O3/Sb2S3/FeOOH thin films are successfully prepared.SEM−EDS analyses reveal that the surface of Sb2O3/Sb2S3 thin films becomes rough after the immersion in the FeCl3 solution.The optimized impregnation time is found to be 8 h.The FeOOH co-catalyst loaded Sb2O3/Sb2S3 electrode exhibits an enhanced photocurrent density of 0.45 mA/cm2 at 1.23 V versus RHE under simulated 1 sun,which is approximately 1.41 times compared to the photocurrent density of the unloaded one.Through the further tests of UV−Vis spectroscopy,the electrochemical impedance spectra,and the PEC measurements,the enhancement can result from the increased light-harvesting ability,the decreased interface transmission impedance,and the remarkably enhanced carrier injection efficiency.

Accumulated Clinical Experiences from Successful Treatment of 1377 Severe and Critically Ill COVID-19 Cases

Summary:In late December 2019,COVID-19 was firstly recognized in Wuhan,China and spread rapidly to all of the provinces of China.The West Campus of Wuhan Union Hospital,the designated hospital to admit and treat the severe and critically ill COVID-19 cases,has treated a large number of such patients with great success and obtained lots of valuable experiences based on the Chinese guideline(V7.0).To standardize and share the treatment procedures of severe and critically ill cases,Wuhan Union Hospital has established a working group and formulated an operational recommendation,including the monitoring,early warning indicators,and several treatment principles for severe and critically ill cases.The treatment experiences may provide some constructive suggestions for treating the severe and critically ill COVID-19 cases all over the world.

Three-dimensional antimony sulfide anode with carbon nanotube interphase modified for lithium-ion batteries

Antimony sulfide(Sb_(2)S_(3))is a promising anode for lithium-ion batteries due to its high capacity and vast reserves.However,the low electronic conductivity and severe volume change during cycling hinder its commercialization.Herein our work,a three-dimensional(3D)Sb_(2)S_(3) thin film anode was fabricated via a simple vapor transport deposition system by using natural stibnite as raw material and stainless steel fiber-foil(SSF)as 3D current collector,and a carbon nanotube interphase was introduced onto the film surface by a simple dropping-heating process to promote the electrochemical performances.This 3D structure can greatly improve the initial coulombic efficiency to a record of 86.6% and high reversible rate capacity of 760.8 mAh·g^(-1) at 10 C.With carbon nanotubes interphase modified,the Sb_(2)S_(3) anode cycled extremely stable with high capacity retention of 94.7% after 160 cycles.This work sheds light on the economical preparation and performance optimization of Sb_(2)S_(3)-based anodes.

Filtered-OFDM——Enabling Flexible Waveformfor the 5G Cellular Networks

To deal with the expected diversification on traffic types, the fundamental waveform of the upcoming5 G standard must be sufficiently flexible. In the 4th generation wireless networks(e.g., cellular LTE and Wi- Fi802.11ac), orthogonal frequency division multiplexing(OFDM) has been widely adopted to combat frequency selectivity and thus improve the spectrum efficiency. Holding various advantages such as backward compatibility with LTE, ease of hardware implementation, time-localized low-latency transmission and straightforward combination with multi-antenna transmission, OFDM will remain as an important waveform candidate for 5G. However,OFDM alone appears to be insufficient in terms of the requirements faced by 5G waveform, such as high flexibility to accommodate different waveform numerologies for an efficient support of diversified traffic types and channel characteristics. In this work, we present a new waveform format, named as filtered-OFDM(f-OFDM) and illustrate its potential and benefits for serving as the underlying waveform of 5G.

循环肿瘤细胞的检测及其在乳腺癌中的临床应用

循环肿瘤细胞是由原发或转移性肿瘤脱落至外周血液及淋巴循环中的肿瘤细胞,与肿瘤转移有着密切的关系。病理活组织检查是疾病诊断的金标准,但由于其有创性、可重复性差及因肿瘤穿刺部位不同以及肿瘤异质性导致的结果不准确,不便于进行疾病的长期监测。相对于活组织检查,循环肿瘤细胞作为液体活组织检查的一种,具有无创、实时、可重复性强等优点,可对肿瘤性疾病进行早期诊断,并根据其动态变化作为反映患者疗效的指标,从而指导治疗,也常用于患者预后预测,评估疾病风险。检测外周循环系统中的循环肿瘤细胞有助于疾病的早期诊断与治疗,提高患者远期生存率。因此,本文总结循环肿瘤细胞的检测及其在乳腺癌中的临床应用进行分析。

Prognostic significance of cytokine receptor-like factor 2 alterations in acute lymphoblastic leukemia:a meta-analysis

Background:Cytokine receptor-like factor 2(CRLF2)has been shown to play a role in the pathogenesis of acute lymphoblastic leukemia(ALL).Studies have examined the relationship between CRLF2 alterations such as over-expression or deregulation and clinical outcome in childhood ALL,but the results are conflicting.This meta­analysis aimed to explore the association between CRLF2 alterations and survival of pediatric patients with ALL.Methods:Electronic databases updated to March 2014 were searched for relevant studies.A meta-analysis was made of twelve studies including 5945 patients to evaluate the prognostic significance of CRLF2 alterations on survival in childhood ALL.Hazards ratios(HRs)with 95%confidence intervals(CIs)were pooled across the studies using a fixed-effects model.Results:CRLF2 over-expression in childhood ALL was associated with poor prognosis in terms of relapse-free survival(RFS;HR=1.70,95%CI=1.28-2.24,P=0.000),event-free survival(EFS;HR=1.78,95%CI=1.05-3.01,R=0.032),and overall survival(OS;HR=2.28,95%CI=1.42-3.65,R=0.001).The combined data also suggested that CRLF2 deregulation in childhood ALL was correlated with poor EFS(HR=1.95,95%CI=1.46-2.61,R=0.000),RFS(HR=2.20,95%CI=1.53-3.18,P=0.000),and OS(HR=1.89,95%CI=1.24-2.87,P=0.003).Subgroup analysis on multivariate HRs showed that CRLF2 deregulation independently predicted a poor prognosis for childhood ALL.Conclusions:The present meta-analysis reveals that both CRLF2 over-expression and deregulation are associated with poor prognosis in pediatric patients with ALL.

重庆市736所中小学直饮水设备滤芯更换及水卫生现状

目的了解重庆市中小学校直饮水设备滤芯更换及直饮水卫生现状,为加强直饮水卫生监督管理,防止暴发流行介水性传染病提供相关依据。方法调查重庆市主城及非主城27区县辖区内736所学校2016年直饮水卫生管理现状。结果此次调查的736所中小学校中,88.5%(651/736)的学校有卫生许可批件;直饮水设备定期清洗消毒率为98.9%(728/736),直饮水设备定期更换滤芯率为99.2%(730/736),开展水质检测率仅为46.5%(342/736),在开展水质检测的学校中水质检测合格率为99.4%(340/342)。非主城区小学水质检测学校开展率、水质检测学校合格率两个指标方面低于非主城区中学(χ2=4.021、4.877,P均<0.05)。非主城区小学在水质检测学校开展率及水质检测学校合格率方面明显低于主城区小学(χ2=10.322,P<0.01)。非主城区中学在水质检测学校合格率方面低于主城区中学(χ2=4.01,P<0.05)。结论 2016年重庆市中小学直饮水卫生状况较2013年有明显改善,加强直饮水送检检查是今后工作重点,非主城区小学应成为今后重点检查对象。

腋窝单孔腔镜辅助下乳房切除术加一期乳房重建研究进展

随着乳腺癌患者发病年龄逐渐年轻化,乳腺腔镜技术的发展也日趋成熟,腋窝单孔腔镜辅助下乳房切除术加一期乳房重建更能满足年轻患者提高生活质量的要求。该手术方式如何选择合适的手术切口,如何优化乳腺腔镜手术过程,如何在一期乳房重建时保持乳房的美观,如何提高患者预后等均是临床医师广泛关注的问题。本文就腋窝单孔腔镜辅助下乳房切除术加一期乳房重建的研究进展进行综述。

Gaseous emissions from compressed natural gas buses in urban road and highway tests in China

The natural gas vehicle market is rapidly developing throughout the world, and the majority of such vehicles operate on compressed natural gas （CNG）. However, most studies on the emission characteristics of CNG vehicles rely on laboratory chassis dynamometer measurements, which do not accurately represent actual road driving conditions. To further investigate the emission characteristics of CNG vehicles, two CNG city buses and two CNG coaches were tested on public urban roads and highway sections. Our results show that when speeds of 0-10 km/hr were increased to 10-20 km/hr, the CO2, CO, nitrogen oxide （NOx）, and total hydrocarbon （THC） emission factors decreased by （71.6 ± 4.3）%, （65.6 ± 9.5）%, （64.9± 9.2）% and （67.8 ± 0.3）%, respectively. In this study, The Beijing city buses with stricter emission standards （Euro IV） did not have lower emission factors than the Chongqing coaches with Euro II emission standards. Both the higher emission factors at 0-10 km/hr speeds and the higher percentage of driving in the low-speed regime during the entire road cycle may have contributed to the higher CO2 and CO emission factors of these city buses. Additionally, compared with the emission factors produced in the urban road tests, the CO emission factors of the CNG buses in highway tests decreased the most （by 83.2%）, followed by the THC emission factors, which decreased by 67.1%.

优化课桌椅配置是改善重庆市中小学教学环境卫生状况的突破口--基于2017-2018年度国家双随机调查的实证研究

目的:调查重庆市中小学教学环境卫生现状,为采取针对性监督措施提供依据。方法:对重庆市39个区县1400所学校2017-2018年度教学环境卫生指标如课桌椅配置、教室采光、黑板照度情况进行国家双随机调查。结果:受检学校课桌椅配置合格率为55.4%(n=776),教室采光合格率为74.9%(n=1048),黑板照度合格率为50.4%(n=706)。完全合格仅24.7%(n=346)。乡镇学校在教室采光、黑板照度合格率方面与城市学校相比,差异无显著性意义,但课桌椅配置合格率显著低于城市学校(51.3%vs.63%,P<0.05)。不同地域内部小学与中学比较,乡镇学校课桌椅配置合格率均低于城市学校(P<0.05);同一地域内小学与中学比较,城市中学课桌椅配置合格率低于小学(P<0.05)。结论:重庆市中小学校课桌椅配置不合格是突出问题,尤其在乡镇学校更为突出,优化课桌椅配置是改善重庆市中小学教学环境卫生状况突破口。

新型冠状病毒感染疫情下传染病防控长效机制构建及实践

为明确新型冠状病毒大流行背景下重庆市中小学新型冠状病毒防控措施现况,为进一步加大防控力度寻找新的突破点,对重庆市39个区县的中小学新冠肺炎防控监进行拉网式检查。在制度建设方面,超过97%的学校建立领导责任制、成立疫情防控专门工作机构、具备传染病疫情防控工作方案、有突发公共卫生事件应急处置预案、有传染病疫情报告制度、有传染病防控健康教育制度等;77.85%的学校有预防接种证查验制度。在制度落实情况方面,超过97%的学校购置有防疫防护必需物资、设置有隔离观察场所、建立师生员工疫情档案、设置师生进校接受体温检测、落实"日报告""零报告"要求、在校师生员工佩戴口罩、设置废弃口罩桶;95.4%的学校饮用水符合《生活饮用水卫生标准》;81%的学校进行出水嘴每天2次酒精消毒;76.1%的学校的教室前排课桌前沿与黑板距离不小于2.2米。防控效果方面,自2020年春季重庆市中小学复课以来,迄今为止未发生中小学生新型冠状病毒肺炎感染案例。重庆市中小学在新型冠状病毒防控方面制度建设及落实方面较好,加强饮用水消毒管理、改善学校硬件设施建设是今后努力的方向。