Breeding of a New Early-ripening Cultivar of Chinese Dwarf Cherry 'Xiarihong'

＇Xiarihong＇ is a new early-ripening variety selected from seedlings of Chinese dwarf cherry （Cerasus humilis Bunge） in 2006. The fruits are oblate and have red skin; the flesh is yellow, sour and sweet. The average mass of a fruit is 6.74 g, and a fruit has a half freestone. The content of soluble solids reaches 10.9%, and total sugar and total acid content are 8.20% and 1.81% respectively, so the ratio of total sugar content to total acid content is 4.53; the edible rate is up to 94.51%. In the flesh, calcium, iron, zinc, and vitamin C content are 219.7, 4.4, 1.09, and 182 mg/kg respectively. Fruits ripen in late July in Beijing, and the development period of fruits is 96-101 d. Fruits can be kept for 3-5 d at room temperature, about 20 d in cold storage, and one year under freezing conditions. It can be cultivated in Beijing, flowers and fruits in the next year, with strong yielding ability.

基于Extra Tree Classifier的水质安全建模预测

随着工业化和城市化的快速发展,水质安全问题日益受到关注。本研究利用一个包含7999条数据记录的水质分析数据集,涵盖多种化学物质浓度测量值与安全阈值,以及“是否安全”分类变量,运用Extr aTree Classifier模型进行水质安全建模预测及数据分析。本研究目的在于提供一个可靠的模型,以帮助决策者和相关部门更好地监测和维护水质安全,从而保障公众健康和环境可持续发展。

Protective effects of oleic acid and polyphenols in extra virgin olive oil on cardiovascular diseases

The Mediterranean diet has long been recognized as one of the most effective ways to prevent and improve cardiovascular disease.Extra virgin olive oil(EVOO)is the typical sources of fat in the Mediterranean diet which have been shown to have noteworthy nutritional value and positive impact on human health.It is worth noting that EVOO owes its superior nutritional value to its bioactive composition.The main component of EVOO is monounsaturated fatty acids(MUFAs)in the form of oleic acid.Oleic acid accounts for up to 70%-80%of EVOO.Secondly,EVOO contains approximately more than 30 phenolic compounds,of which HT is essential for the protection against cardiovascular diseases.In this review,we focused on the potential mechanisms of oleic acid and polyphenols combat cardiovascular diseases risk in terms of oxidative stress,inflammation,blood pressure,endothelial function and cholesterol.This review might provide a reference for the studies on cardiovascular protective effects of EVOO.

Clinical outcomes in patients diagnosed with extra-nodal Hodgkin lymphoma: a 20-year retrospective analysis of the National Cancer Institute’s Surveillance, Epidemiology, and End Results (SEER) database

Background:Hodgkin lymphoma refers to a malignancy of the lymphatic tissue.Extra-nodal Hodgkin lymphoma(ENHL)is a rare variant consisting of Hodgkin lymphoma occurring outside the lymphatic system.Studies investigating the epidemiology associated with ENHL are rare.Methods:618 ENHL cases were analyzed using the National Cancer Institute’s Surveillance,Epidemiology,and End Results(SEER)database(2000–2020).Demographics including sex,race/ethnicity,rural-urban continuum,age group(categorized as adolescent and young adult(AYA)if between years of 15 and 39,and adult if over the age of 40),and living status(alive/deceased)were examined,with survival status as the main outcome.Results:This study included 335 males(54.2%)and 283 females(45.8%).Of this total,47.9%were in the AYA group.In terms of ethnicity the distribution was 12.5%non-Hispanic Black,67.5%non-Hispanic White,5.2%non-Hispanic Asian/Pacific Islander,and 14.9%Hispanic.Bivariate analyses evidenced significant differences in survival by age group with 91.6%in AYA vs.72.4%in adults(P<0.001)alive by the end of the study period.Multivariable analyses identified age as a key predictor of survival,as the AYA patients had a lower odds ratio for death(odds ratio=0.25,P<0.001).In addition,survival outcomes were also impacted by race,with non-Hispanic Blacks showing higher survival probabilities.Regarding treatment,27.0%of patients underwent surgery,with 10.2%receiving post-surgery radiation,reducing odds of mortality(odds ratio=0.32,P=0.046).Conclusion:The background research as such,tends to affirm that these two factors–age and race are quite crucial in the prognosis as well as management of ENHL.Compared to adults,AYA patients had significantly lower odds of death,while non-Hispanic Black individuals exhibited reduced survival probabilities.It should be noted that 27.0%of patients underwent surgery with 10.2%receiving post-operative radiation which led to decrease in mortality rates.Thus,these results reiterate the necessity for tailor-made treatment methods according to demographic characteristics to boost patient outcomes effectively.For better ENHL care,future studies could shed light on these disparities and improve treatment regimens as needed.

Extra-Axial Anaplastic Pleomorphic Xanthoastrocytoma Mimicking Meningioma: A Case Report with Literature Review

Background: A number of meningeal neoplastic lesions may radiologically and clinically simulate meningioma, include hemangiopericytomas, solitary fibrous tumors, schwannomas, hematolymphoid lesions, metastases, and others very rarely, also may clinically mimic meningiomas. Case Description: We present the case of A 28-year-old male patient, with no notable medical history, who presented with worsening headaches for 3 months, imbalance, and visual deficits, An initial MRI revealed extra-axial lesion involving the right Parieto-occipital, The tumor was hypointense on T1-weighted MR images, hyperintense signals on T2-weightedMR images, and heterogeneously enhanced suggestive of a meningioma, total resection was achieved, and the histopathological analysis confirmed the diagnosis of an angioblastic meningioma. However, 15 months later, the patient presented with the same initial visual complaints. A subsequent MRI showed lesion recurrence, leading to a second surgical intervention. The histopathological analysis confirmed the diagnosis of an anaplastic xanthoastrocytoma. Conclusion: This represents an unusual location for an anaplastic pleomorphic xanthoastrocytoma, which should broaden the differential diagnosis of extra-axial lesions.

Analysis of the Risk of Water Breakout in the Bottom Plate of High-Intensity Mining of Extra-Thick Coal Seams

In order to clarify the danger of water breakout in the bottom plate of extra-thick coal seam mining, 2202 working face of a mine in the west is taken as the research object, and it is proposed to use the on-site monitoring means combining borehole peeping and microseismic monitoring, combined with the theoretical analysis to analyze the danger of water breakout in the bottom plate. The results show that: 1) the theoretically calculated maximum damage depth of the bottom plate is 27.5 m, and its layer is located above the Austrian ash aquifer, which has the danger of water breakout;2) the drill hole peeping at the bottom plate of the working face shows that the depth of the bottom plate fissure development reaches 26 m, and the integrity of the water barrier layer has been damaged, so there is the risk of water breakout;3) for the microseismic monitoring of the anomalous area, the bottom plate of the return air downstream channel occurs in the field with a one-week lag, which shows that microseismic monitoring events may reflect the water breakout of the underground. This shows that the microseismic monitoring events can reflect the changes of the underground flow field, which can provide a reference basis for the early warning of water breakout. The research results can provide reference for the prediction of sudden water hazard.

特稠油绿色冷采实验

针对稠油热采存在油汽比低、能耗大、CO_(2)排放高以及稠油冷采采出液难处理等问题,采用自制的降黏驱油剂ODA1配制驱替液,对其进行了静态降黏评价、性能分析以及特稠油冷采物理模拟实验研究。结果表明:提高驱替液中ODA1的质量分数和矿化度,均能有效降低稠油黏度;当驱替液中ODA1质量分数为2%、矿化度为100 g/L时,特稠油与驱替液以质量比为0.5混合后的降黏率达到了70.62%;特稠油在驱替液表面自发扩散,油水自动分相,完全不乳化。在渗透率约为1 000×10^(-3)μm^(2)、地层温度为40℃、特稠油黏度为11 600 m Pa·s条件下进行模拟驱油实验,驱替液驱的采出程度较模拟地层水驱采出程度提高了6.31百分点;水驱后驱替液依次进行转驱、第1次闷井和第2次闷井,采出程度分别提高了7.48、11.70和7.83百分点,合计较水驱提高了27.02百分点,采出稠油在40℃条件下的黏度降至3 553 m Pa·s,降黏率达61.37%,驱替液具有边驱油边降黏的特点。同时在冷采过程中无碳排放,采出水无污染,可循环利用。研究成果为特稠油绿色冷采提供了一种新的技术思路。

Vanadis 4 Extra模具钢的干滑动摩擦性能

采用"销-盘"摩擦磨损试验测试不同滑动速度下Vanadis 4 Extra和Cr12MoV模具钢干滑动严重磨损的临界载荷,通过SEM、EDS、OM观察磨损形貌并分析磨损机理及原因。结果表明:滑动速度增大,两种钢严重磨损的临界载荷均减小,Vanadis 4Extra和Cr12MoV两种钢严重磨损的临界载荷分别为:0.691 m/s范围内为900 N和600 N;0.921 m/s时为700 N和300 N。载荷小于临界载荷时以磨粒磨损为主,大于临界载荷之后Vanadis 4 Extra以氧化磨损为主,Cr12MoV为氧化磨损和塑性变形。在不同滑动速度及载荷下,Vanadis 4 Extra模具钢的耐磨性均高于Cr12MoV钢3~18.3倍。

特厚煤层覆岩裂隙−渗流区域演化规律及工程应用

【目的和方法】覆岩结构对卸压瓦斯抽采有重要影响,为探究特厚煤层开采过程中上覆岩层瓦斯运移规律,采用物理相似性模拟实验方法分析覆岩裂隙形态和渗流能力演化规律,研究特厚煤层覆岩裂隙−渗流特征区域演化机理,提出特厚煤层覆岩裂隙−渗流特征区域识别方法,依据该识别方法在实验工作面进行定向钻孔抽采实践。【结果和结论】结果表明:(1)覆岩中间区域离层量和裂隙密度分别为两侧区域的47%和31%,呈现中间低两边高的分布模式。开采初期,覆岩的裂隙−渗流特征在空间分布具有同步性,随着工作面进一步推进,覆岩受到不同程度的采动影响,覆岩逐渐开始分区演化,中间区域裂隙−渗流特征明显小于四周,两侧区域则随着层位的增加而递减,裂隙率、裂隙熵、连通性系数和渗透率范围分别为1.0%~8.5%、0.15~0.90、0.10~0.65和6.34×10−9~7.78×10−7 m2。(2)基于覆岩裂隙和渗流能力对瓦斯运移的影响,将覆岩分为4个区域,分别是低位湍流区、中位压实区、中位过渡区和高位恒流区,基于裂隙率、裂隙熵、连通性系数和渗透率在不同区域的时空演化规律,建立特厚煤层覆岩裂隙−渗流特征区域演化模型和判定流程。(3)根据覆岩裂隙−渗流特征区域演化模型,分析中位过渡区和高位恒流区为抽采优势层位,设计钻孔垂距为6~25 m,将钻孔抽采纯量随时间的变化过程分为初始波动阶段、快速增长阶段和缓慢下降阶段,回采期间工作面甲烷体积分数均小于1%,工程实践效果良好,验证了方法的可行性和定向钻孔布置的合理性。研究结果为瓦斯抽采钻孔参数的优化和煤层瓦斯治理提供一定的理论指导。

电针董氏奇穴治疗踝关节骨折术后疼痛的临床观察

目的 观察电针董氏奇穴治疗踝关节骨折术后疼痛的临床疗效。方法 将踝关节骨折术后患者60例随机分为观察组与对照组各30例。两组患者均在术后常规处理基础上予以多模式镇痛治疗方案,观察组患者配合行电针董氏奇穴。两组疗程均为14 d。观察和记录两组患者术后不同时间节点的疼痛视觉模拟表(VAS)评分、踝关节主动、被动活动度。结果 1个疗程后,两组患者VAS评分、踝关节主动活动度、被动活动度均较治疗前明显改善(P<0.05),两组比较,观察组较对照组改善更显著(P<0.05)。结论 电针董氏奇穴能有效减轻踝关节骨折术后疼痛,并有效改善踝关节活动功能,促进患者早期康复。

Analysis on the Production Advantages of USA Pima Extra Long Staple Cotton

This paper defines the following advantages of ELS （Extra Long Staple） also known as Pima cotton planted in the United States： first, the only variety which is concentrated in the planting area with good soil moisture and fertilizer retention performances and abundant light and heat resources; second; advanced and practi- cal material equipment and technology; third; high yield and good quality, significant planting scale benefit; fourth, feasible and reliable modernized intensive farm man- agement mode with large-scale agricultural machinery operation; fifth, high-efficient social services and policy support system, as well as reasonable planting layout, good brand influence, synchronization of high yield and good quality with large-scale benefits. Although the production capability of Pima cotton in the United States is considered to be the largest and most powerful country in the world, compared with the ELS production in China, both have their own advantages and characteristics. Therefore, it is suggested that by using the ELS production experience ol the Unit- ed Stages for reference, China should make use of the modern breeding technJques to accelerate the modification of synthetic genetic features of ELS variety, try its best to breed the ELS variety which is suitable for mechanical plucking as soon as possible, actively develop new technology to simplify the whole cost saving cultiva- tion, reform ELS production organization, vigorously develop the social service sys- tem, and adjust and optimize the ELS industry support policies, so as to fundamen- tally improve the competitiveness of China＇s ELS in international market.

逆行与顺行胫骨髓内钉治疗胫骨远端关节外骨折的疗效对比研究

目的比较胫骨逆行髓内钉与胫骨顺行髓内钉治疗胫骨远端关节外骨折患者的临床疗效。方法回顾性分析2020年8月~2022年8月我科收治的56例胫骨远端关节外骨折患者。23例患者接受胫骨逆行髓内钉固定,33例患者接受胫骨顺行髓内钉固定,记录并比较两组的一般临床资料、手术时间、透视次数、住院时间、骨折愈合时间、完全负重时间、胫骨远端关节面成角、末次随访时美国足踝矫形外科协会(American Orthopedic Foot and Ankle Society,AOFAS)评分、并发症等指标。结果所有患者均获12~20个月的随访。逆行髓内钉组骨折线距胫骨远端关节面平均距离较顺行髓内钉组更短,差异有统计学意义(P=0.001)。两组患者的其他一般临床资料差异无统计学意义。顺行髓内钉组平均透视次数多于逆行髓内钉固定组,差异具有统计学意义(P=0.001);逆行髓内钉组完全负重时间和骨折愈合时间均优于顺行髓内钉组,差异有统计学意义(P=0.002和P=0.018)。逆行髓内钉组和顺行髓内钉组术后并发症分别为4例和10例,并发症发生率差异无统计学意义。结论逆行和顺行胫骨髓内钉均是治疗胫骨远端关节外骨折的有效方法,从透视次数、完全负重时间和骨折愈合时间来看,逆行髓内钉更具有优势。

全球价值链的法律监管

全球价值链的形成催生了新的经济现实,提出了新的贸易监管需求。全球价值链以加强投资保护和资本自由为基本原则,要求各经济体实现更深层次的承诺与合作。新技术赋能下的全球经济发展不再受传统的地域捆绑,全球价值链的嵌入要求规则整体化而非碎片化,国际贸易法应当成为促进全球价值链贸易的工具,面临着多边统一性难题的WTO应当成为规则的制定者与监管者。基于全球价值链的国际贸易法应当是市场驱动者与保护者,却面临着“选择性自由贸易化”以及南北发展差距等诸多问题,使得规则共识与承诺的纵深度不高。对此,需要加强国际贸易的监管趋同与融合,尤其是对私人权利的保护性监管,但可能加剧日益严重的多边与区域之间的争端解决管辖权竞合问题。在WTO Plus和WTO Extra领域实现贸易监管的自由化,同时兼顾东道国的预期利益。

复杂地层超长桩后压浆施工工法探究与实践

在复杂地质环境下,超长桩施工难度大、造价高,基桩的单桩承载力特征值无法满足设计要求。后压浆灌注技术可以通过在施工灌注桩时预先安装注浆管,极大提高桩端承载力及桩与土之间的摩阻力。以广东省深圳市南山某一项目为例,探讨了在复杂地质条件下抗拔桩的后压浆施工工艺,桩基承载能力得到大幅提升,在有限桩长下满足了设计要求。

海上深层薄“甜点”储层预测——以Z气田H4—H5层为例

特低渗气藏的有效开发难度大,“甜点”预测及开发井位设计是低渗气藏有效开发的关键。使用梯度-90°相移技术对特低渗储集层进行了精细刻画,得到了砂体厚度图;在此基础上,通过微观和测井资料分析,明确“甜点”发育的类型及成因。在“甜点”发育模式的指导下,采用梯度波谷和属性定性识别孔隙型“甜点”发育区,采用最大似然属性和裂缝密度识别裂缝型“甜点”发育区。研究区H4层主要发育孔隙型“甜点”,平面上位于研究区北部和东部,纵向上位于H4b2和H4b3小层。H5层发育裂缝型和孔隙型“甜点”,平面上位于研究区南部,纵向上位于H5a3和H5a4小层。孔隙型“甜点”分布受控于有利沉积相带区,裂缝型“甜点”主要发育在靠近断裂附近和翼部构造强挤压区。基于“甜点”刻画结果,部署2口多底井,试验井大斜度段位于H5a层,水平段分支部署在H4b层,兼顾H4和H5“甜点”,实现特低渗气藏的有效开发。本研究方法对深层发育薄“甜点”的特低渗气藏“甜点”预测和开发方案编制具有参考意义。

利用Extra.FLV建设教学资源库

FLV是当前网络上最流行的视频格式,然而针对FLV格式文件进行剪辑、合并及转换等的操作并不是很方便。本文简单介绍了Extra.FLV软件在建设FLV格式视频教学资源库中的作用。

颍河特大桥深水承台施工围堰研究

以颍河特大桥深水承台围堰工程为例,分析比较了钢板桩围堰、钢套箱围堰、堰模一体钢围堰的施工方案,介绍了钢板桩围堰的设计及施工方法,指出相关围堰技术具有一定的实用性和先进性。

深水钢桁梁无承台特大桥无应力状态法合龙应用研究

深水区域钢桁梁特大桥无承台桩基施工需要特别考虑施工工艺及其受力体系控制。依托四川汉源兰家湾特大桥工程,基于无应力状态方法分析计算钢桁梁特大桥的无桩基承台施工技术以及合龙施工的若干力学研究。结果表明,通过搭建深水区域无承台的特大桥桩墩结合施工,在其上进行钢桁梁安装拼接的无应力状态法合龙施工可取得良好受力整体性效果。所述方法可解决在较深水流条件下的特大桥桩基施工与整体受力控制难题,可为类似工程提供技术参考和借鉴。

基于改进AHP和熵权法的特长公路隧道消防救援能力评价

为降低特长公路隧道火灾事故的危害,进一步提高特长公路隧道的消防救援能力,亟需开展对特长公路隧道的消防救援能力进行定量评估的研究。基于4个核心维度即自身消防救援力量、自身消防救援设施、外部消防救援力量及辅助消防救援力量,并细分至24个具体指标,构建了一套全面系统的特长公路隧道消防救援能力评价体系。针对传统的层次分析法易受评价对象专业水平的影响导致评估结果不准确的问题,通过改进层次分析法,增强了评价的客观性和准确性。同时,结合熵权法对湖南省某特长公路隧道的消防救援能力进行了全面的综合评价。评价结果显示,该特长公路隧道的消防救援能力得分为78.75,显示出较高的消防救援能力水平。针对在评价过程中发现的得分较低的自身消防救援力量指标,提出了相应的改进措施。这些措施将进一步为提升特长公路隧道的消防救援能力提供有力的数据参考和决策支持。

热处理对Vanadis 4 Extra模具钢组织与性能的影响

研究了热处理工艺对Vanadis 4 Extra模具钢组织、硬度、冲击韧性和耐磨性的影响。结果表明:淬火处理后的显微组织为马氏体、残留奥氏体和碳化物;硬度随奥氏体化温度的升高先升后降,在1 020℃时硬度最高;残余奥氏体随奥氏体化温度的升高而升高;随回火温度的升高,硬度和冲击韧性变化趋势相反,在500℃回火后,硬度达到最高值62.1HRC,而冲击韧性达到最低值50.1J/cm^2;磨损率随回火温度的升高先变化不大,但在600℃时急速增大。