Diagnostic efficacy of virtual organ computer-assisted analysis in measuring the volume ratio of subchorionic hematoma with serum progesterone

BACKGROUND Subchorionic hematoma(SCH)is a common complication in early pregnancy characterized by the accumulation of blood between the uterine wall and the chorionic membrane.SCH can lead to adverse pregnancy outcomes such as miscarriage,preterm birth,and other complications.Early detection and accurate assessment of SCH are crucial for appropriate management and improved pregnancy outcomes.AIM To evaluate the diagnostic efficacy of virtual organ computer-assisted analysis(VOCAL)in measuring the volume ratio of SCH to gestational sac(GS)combined with serum progesterone on early pregnancy outcomes in patients with SCH.METHODS A total of 153 patients with SCH in their first-trimester pregnancies between 6 and 11 wk were enrolled.All patients were followed up until a gestational age of 20 wk.The parameters of transvaginal two-dimensional ultrasound,including the circumference of SCH(Cs),surface area of SCH(Ss),circumference of GS(Cg),and surface area of GS(Sg),and the parameters of VOCAL with transvaginal three-dimensional ultrasound,including the three-dimensional volume of SCH(3DVs)and GS(3DVg),were recorded.The size of the SCH and its ratio to the GS size(Cs/Cg,Ss/Sg,3DVs/3DVg)were recorded and compared.RESULTS Compared with those in the normal pregnancy group,the adverse pregnancy group had higher Cs/Cg,Ss/Sg,and 3DVs/3DVg ratios(P<0.05).When 3DVs/3DVg was 0.220,the highest predictive performance predicted adverse pregnancy outcomes,resulting in an AUC of 0.767,and the sensitivity,specificity were 70.2%,75%respectively.VOCAL measuring 3DVs/3DVg combined with serum progesterone gave a diagnostic AUC of 0.824 for early pregnancy outcome in SCH patients,with a high sensitivity of 82.1%and a specificity of 72.1%,which showed a significant difference between AUC.CONCLUSION VOCAL-measured 3DVs/3DVg effectively quantifies the severity of SCH,while combined serum progesterone better predicts adverse pregnancy outcomes.

Application of BIM + Virtual Simulation Technology in Road Engineering Construction Technology and Organization Course

We focus on the goal of undergraduate talent training,consider the course features of Road Engineering Construction Technology and Organization,analyze the problems existing in the practical teaching of the course,use the advantages of BIM+virtual simulation technology,design a scientific and reasonable practical teaching content of Road Engineering Construction Technology and Organization,and address the contrast between the strong practical aspect of the traditional Road Engineering Construction Technology and Organization course and the lack of practical instruments in hope to improve students’learning autonomy,enhance the quality of practical teaching,achieve the training objectives of the course,and nurture applied technical talents.

Constructing global view with an ontology-based method for information sharing in the virtual organization

The problem of constructing global view of heterogeneous information sources for information sharing is becoming more and more important due to the availability of multiple information sources within the virtual organization. Global view is defined to provide a unified representation of the information in the different sources by analyzing concept schemas associated with them and resolving possible semantic heterogeneity. An ontology-based method for global view construction is proposed. In the method, （ 1 ） Based on the formal ontologies, the concept of semantic affinity is introduced to assess the level of semantic relationship between information classes from different information sources; （2） Information classes are classified by semantic affinity levels using clustering procedures so that their different representations can be analyzed for unification; （3） Global view is constructed starting from selected clusters by unifying representation of their elements. The application example of using the method in the joint-aerial defense organization is illustrated and the result shows that the proposed method is feasible.

Virtual Organization Information Systems and its Reengineering for Agile Manufacturing

It is now possible to organize globally while worki ng locally: Information technologies like e-mail, the Internet, and video confere ncing to the desktop permit tight coordination of geographically dispersed worke rs across time zones and cultures. Companies are not limited to physical locatio ns for providing products and services. Networked information systems are allowi ng companies to coordinate their geographically distributed capabilities as virt ual organizations. In order for organizations to succeed, they must be able to r espond with agility in a geographically dispersed environment. The core for a vi rtual organization to increase the utilization rate of resources to the maxi mum and to make full use of the transient market opportunities lies in how to br ing the potential of information technology into play. Based on the philosophy o f agile manufacturing, this paper analyses the basic concepts and connotation of Virtual Organization Information systems(VOIS). VOIS is an information system composed of some independent information subsystems that are autonomous, collab orative and belong to umpty organizations respectively. VOIS support the operati on of virtual organization, and automate the information flow across organizatio nal boundaries. Such systems have capabilities as rapid construction, quick oper ation, and agile reengineering and swift adaptability. Differences between VOIS and traditional enterprise information systems are analyzed. On the basis of ana lyzing the structure of VOIS, an abstract hierarchical structure of VOIS is prop osed using object-oriented method. Reengineering ideology and methods of VOIS a re also explored in light of the three layers structure.

Technology Innovation Mode of Agricultural Leading Enterprise——Based on the Virtual Organization Mode

Based on the definition of technology innovation of agricultural leading enterprises by domestic and foreign experts and scholars,technology innovation of agricultural enterprises is a process of new market increment,which uses new knowledge,technology,process and production mode,produces new products,offers new services and realizes commercialization. Characteristics of agricultural technology innovation are introduced,such as obvious regionality,relatively high risk,long-term periodicity and public attribute. Predicament for technology innovation of leading enterprises is analyzed,such as technical constraints,financial constraints and personnel constraints. Technological Innovation Mode can be classified into three modes of independent innovation,imitative innovation and cooperative innovation by the method of technology innovation. Among them,since there are some defects in the technology innovation process,independent innovation and imitative innovation are generally not used for the innovation of agricultural enterprises. Cooperative Innovation Mode can rely on foreign aid,can realize complementary advantages and achievement sharing,and can be widely applied in the agricultural innovation enterprise. Virtual organization in cooperation innovation mode is described,which makes up for technology,capital and human resources barriers in the process of agricultural enterprise innovation. Therefore,this mode is popular among the agricultural innovation enterprise.

Evaluation of Estrogenic Receptor (ER) and Aryl Hydrocarbon Receptor (AhR) Agonists in Three Gorges Reservoir, China Using SPMD-Based Virtual Organisms

The evaluation of estrogenic activities and aryl hydrocarbon receptor (AhR) agonists in water from Three Gorges Reservoir (TGR) China was conducted by in vitro bioassays combined with SPMD-based virtual organisms (VO). VOs were deployed at seven sites in the Three Gorges Reservoir (TGR), China for two periods in 2009. The estrogenic activity was assessed using a rapid yeast estrogen bioassay, based on the expression of a green fluorescent reporter protein (yEGFP). The AhR activity was detected employing rat hepatoma cell line (H4IIE). The results indicate that AhR agonists distributed widely in water of TGR and almost homogenously distributed in most area of TGR. Weak antiestrogenic activities were also found homogenously distributed in water of TGR. Further studies are needed to determine the identities of these estrogenic compounds and AhR agonists and their potential adverse effects on wild biota in TGR.

Study on the Agile Virtual Enterprise′s Organizing Form and Running Environment

In this paper, we begin with the swift changes in the knowledge economy time,analyze the implication of the agility, and consider the agile virtual enterprise as the mainorganizational form for the manufacturing enterprises to realize agility. We classify the agilevirtual enterprises into products alliance style and knowledge alliance style, and compares theirmain features and profit distribution models. As a result, we give four basic structures for thebuilding and running of the agile virtual enterprises.

Partners selection of VE based on the organizational field

VE organizational field is a management meaning field formed by the mutual action of resources element.It studies leader and partners in VE as a system,and founds the affiliation among them by the relation of resources.It describes candidate partner enterprise's inner trait and exterior trait by quality parameter and exterior parameter,then analyzes and evaluates them.It combines the qualitative variable and quantitative variable to evaluate the candidate enterprises.It integrates static and dynamic method to help the VE leader to choose partner,which is good for the whole alliance.

虚拟教研室内涵、运行现状及建设对策探析

在传统基层教学组织日渐式微背景下,虚拟教研室在“智能+”信息化时代开始大规模建设,信息化、基层教学组织、协同教研新形态是虚拟教研室的3个主要特征。国家级虚拟教研室的建设探索概括为搭建平台、召开工作会议、共建优质资源、开展教师培训和建立评价监测机制5点。最后,从加强学校顶层设计、聚焦特色分类发展、整合资源发挥协同作用、建立结合学科特色的评价监测和激励机制4个方面提出加强虚拟教研室建设的对策,为各学校虚拟教研室的建设提供参考。

面向贯通式项目制教学的虚拟教研室组织模式实践

贯通式项目制教学模式是新工科背景下的工程教育新模式,贯穿大学本科四年,通过在做中学的实践,培养学生综合运用知识的能力和解决问题的能力。面向贯通式项目制教学的虚拟教研室是跨学科、跨专业、跨课程的校企联合的新型基层教学组织,是教学研究改革专题虚拟教研室。遵循教学问题导向原则,探讨实践了虚拟教研室的人员组成和人员管理模式。实践了充分运用信息技术,突破时空限制,开展高效便捷、形式多样、线上线下结合的教研新模式,提出了基于国家虚拟教研室平台的贯通项目制教学优质教学资源和教师培训的建设方案,为新型基层教学组织建设提供了一种新思路。

新型Hy-Vo齿形链与链轮的啮合分析及其设计方法

在分析与计算新型Hy-Vo齿形链变节距特性的基础上,提出'当量边心距'的概念,指出'定位偏置角'的设计原则。在研究新型Hy-Vo齿形链、链轮、滚刀之间的啮合与滚切原理的基础上,建立三者之间主要参数的谐应关系,提出可用于指导新型Hy-Vo齿形链、链轮及其滚刀设计计算的解析表达式。试验研究表明,这种新的设计方法是切实可行的。

对比三维超声VOCAL技术与CT评估兔肝脏体积

目的对比评估三维超声VOCAL技术和CT测量兔肝脏体积的准确性。方法分别采用三维超声VOCAL技术和CT测量30只兔肝脏体积,将测量结果与采用水浸法测得的肝脏实际体积值进行比较。结果兔肝脏体积的三维超声VOCAL测量值、CT测量值与实际值间两两比较差异均无统计学意义(P均>0.05)。VOCAL法与CT法的测量误差分别为8.40%±4.40%及6.68%±4.45%(P>0.05)。三维超声VOCAL法测得的兔肝脏体积与实际值高度相关(r2=0.880,Y=9.146+0.826 X,P<0.001)。结论三维超声VOCAL技术可以准确测量兔肝脏体积,为评估不规则脏器体积提供了新的方法。

基于Agent技术的虚拟组织集成框架IFVO

虚拟组织正成为常规组织（或个人）间协同工作的重要形式，并要求集成化信息基础的支持．文中提出一个基于Ａｇｅｎｔ技术的虚拟组织集成框架ＩＦＶＯ，它以面向活动分担的联合意向作为主要手段从３ 个方面：体系结构方式、Ａｇｅｎｔ协作和语义互操作，支持集成化虚拟组织信息基础的开发和协调运作．ＩＦＶＯ将虚拟组织的信息基础封装和构造为可快速组合和拆卸的嵌套Ａｇｅｎｔ联邦，从而能有效地支持虚拟组织的动态建立。

基于自由曲面和L-system的红掌生长模型

针对红掌花卉生长可视化中参数难以确定的问题进行研究,提出推导控制点的方法,建立红掌器官模型:采用Bezier曲线结合扫描成型的方法来构造叶柄模型,采用双三次NURBS曲线对佛焰苞进行建模;运用红掌的相关表型数据拟合生长函数,提出基于红掌生长规律的微分L-system,可有效模拟红掌的拓扑结构和生长过程;通过虚拟器官表示红掌器官的几何属性,降低微分L-system的复杂度。试验验证提出的方法对红掌各项生长指标拟合度可达0.89以上,并可对每个生长阶段的红掌进行模拟,能有效地对红掌的生长过程进行建模。

新高考背景下虚拟仿真技术在高职药学有机化学实验教学中的应用

有机化学实验是高职药学专业的一门重要基础课。新高考背景下,学生来源类别多样,化学基础不均衡,传统的实验教学模式难以达到良好的教学效果,对培养现代化高质量的药学技术人才提出了很大挑战。文章从药学专业学情出发,在原有教学模式下,适当融入虚拟仿真实验技术,从教学内容、教学方式和考核评价等方面,对“虚实结合”的有机化学实验教学模式做了相关探索,总结了一定的经验,希望能对其他职业院校的药学人才培养提供可操作性建议。

基于VO和Gossip的网格空间信息服务发现模型

针对现有集中式和分布式服务发现模型的不足,提出了一种基于OWS和小世界模型的混合服务发现算法,该算法以虚拟组织为单位进行扩散,虚拟组织之间采用Gossip消息扩展机制来进行服务,在虚拟组织内部则基于集中式的目录服务进行服务匹配。针对传统Gossip算法采用纯随机策略进行消息发送的缺点,依据小世界模型,在虚拟组织信息表中随机增加shortcut,改进了算法的效率。构建了模拟试验环境,验证了算法的可行性和效率。

考虑韧性的无人机集群自组织区域覆盖方法

为提高无人机集群执行自组织区域覆盖任务成功率,提出一种基于个体相互作用力、边界排斥力、重点区域吸引力3种虚拟力的分布式自组织覆盖算法。在此基础上,进一步考虑无人机个体自身故障或毁伤等失效的影响,将集群韧性指标纳入到覆盖关键阈值调节机制中。仿真实验结果表明,该方法能有效使无人机集群对目标区域及重点区域进行覆盖,且能在集群发生故障或遭受毁伤后迅速进行自组织恢复,获得较高的任务成功率。

抗核抗体与低分子肝素治疗不明原因复发性流产子宫胎盘血流指数的关系

目的探讨抗核抗体(ANA)与低分子肝素(LMWH)治疗不明原因复发性流产(URSA)孕妇子宫胎盘血流指数的关系。方法2020年1月至2022年12月期间,共纳入80例URSA孕妇,其中40例接受LMWH治疗,另外40例未接受LMWH治疗,2组ANA阴性(-)和ANA阳性(+)各20例。借助虚拟器官计算机辅助分析技术进行2D多普勒测量子宫动脉搏动指数(PI)和3D超声测定血管化指数(VI)、血流指数(FI)和血管化血流指数(VFI),并对所有女性进行血清ANA测定。结果未接受LMWH治疗和接受LMWH治疗的ANA(-)URSA孕妇分娩孕周、新生儿结局比较,差异具有统计学意义(P<0.05)。无论ANA状态如何,未接受LMWH治疗和接受LMWH治疗的URSA孕妇间PI、VFI、FI值差异均无统计学意义(P>0.05)。而接受LMWH治疗的ANA(-)URSA孕妇VI值显著高于未接受LMWH治疗的ANA(-)URSA孕妇(20.02±6.06 vs 11.60±3.04,P<0.001)。仅考虑ANA(-)URSA患者,VI用于区分接受和未接受LMWH治疗孕妇的ROC曲线下面积为0.889(标准误=0.053,P<0.001,95%置信区间=0.785~0.993),VI临界值为16.05,灵敏度为75.0%,特异性为100.0%。结论LMWH可能对于恢复ANA(-)状态下URSA女性VI的生理血流供应具有潜在的有益作用,但是仍需要更进一步的研究来解释彼此之间的关系。