乳腺锥光束CT平扫在乳腺病灶筛查及性质评估中的应用价值分析

目的:探讨乳腺锥光束CT(Cone Beam Breast CT,CBBCT)平扫在乳腺病灶筛查及性质评估中的应用价值。方法:收集2020年6月~2022年6月在本院接受乳腺结节切除术的患者178例作为研究对象,分别采用锥光束乳腺CT平扫、数字乳腺X射线摄影(Digital Mammography,DM)进行术前检查,对比其乳腺结节检出率、乳腺癌诊断准确率的差别。结果:CBBCT平扫、DM对乳腺腺体分型的Kappa值为0.611,P<0.05,两种检查方式之间对乳腺腺体类型的评估结果具有一致性。178例患者中,经病理证实共227个病灶(119个恶性、108个良性),其中DM检出160个病灶、检出率为70.48%;CBBCT平扫检出227个病灶,检出率为100%。CBBCT平扫的乳腺结节检出率高于DM,差异有统计学意义(P<0.05)。CBBCT平扫诊断乳腺癌的灵敏性为86.11%、特异性为97.10%;DM诊断乳腺癌的灵敏性为72.09%、特异性为90.88%。CBBCT平扫、DM诊断乳腺癌的灵敏度、特异度差异无统计学意义(P>0.05)。ROC曲线显示,CBBCT平扫诊断乳腺癌的效能优于DM(P<0.05)。结论:CBBCT平扫有助于乳腺结节检出率、乳腺癌诊断率的提升,是一种理想的术前检查手段。

可信网络中基于AHP的用户行为评估性质及应用

文献[3]讨论了可信网络中一种基于AHP的用户行为评估方法。该文在文献[3]的基础上进一步讨论了用户行为评估中各特性和各证据的权重、证据值的变化对用户行为评估值的影响进行了讨论,并论证了基于AHP的用户行为评估中的一个重要性质。在此基础上,介绍了该性质在用户行为控制中的应用。

双源CT在冠状动脉狭窄及斑块性质评估中的应用价值

分析在冠状动脉狭窄及斑块性质评估中,应用双源CT进行诊断的应用效果。方法:研究时间段选取近1年,患者例数为100例,所有患者都为冠心病患者,为患者进行冠状动脉造影(CAG)与双源CT(DSCT)检查。分析患者冠状动脉节段情况,对斑块的CT值以及冠状动脉狭窄程度进行测量。对比两种诊断方式下对患者的冠脉狭窄程度检查情况。结果:DSCT诊断方式下在冠状动脉狭窄方面的诊断准确率明显高于CAG,两种方式差异显著(P<0.05);DSCT诊断方式中,在斑块性质的诊断方式,与CAG方式的差异较小(P>0.05)。结论:在冠状动脉狭窄及斑块性质评估中,通过应用DSCT的诊断方式下,能更好的判断患者冠状动脉狭窄情况,评估患者的斑块性质,应用效果显著,值得推广。

图像传感器性能评估和图像恢复的模型

本文描述了一个比较和评估现在和未来图像传感器性能的一般模型。它是由包括大气影响、传感器光学系统、探测器、电子学、显示器等若干模型所组成的。这个模型可以作为鉴别当前和未来传感器系统设计的优劣和评价在同一条件下不同原理的传感器系统的功能以及估算某些需要数据重建滤波器设计参数的低成本且通用的工具。

关于酶解法制备微晶纤维素的实验研究

本研究旨在通过酶解法制备微晶纤维素,并评估其制备效果。选择适当的纤维素酶种类和来源,调整酶解反应的温度、pH值、酶浓度和酶解时间等条件,进行酶解反应。通过分离、洗涤和干燥处理,获得微晶纤维素样品。对样品进行形貌和性质分析,并与已有研究进行比较。实验结果表明酶解法能有效制备出高质量的微晶纤维素,具有潜在的应用前景。

我国公共价格评估机构性质定位及制度设计——基于公共利益视域下的研究

公共评估与一般评估业务的差异决定了公共评估机构与一般评估机构在性质定位、价值取向、运作特点、管理机制等方面也存在本质差别。本文从公共评估业务的本质特征着手,分析公共评估机构应有的性质功能定位,并在此基础上为我国公共价格评估机构的制度设计提出相应的政策建议。

Evaluation of genetic potential of the polyvoltine silkworm (Bombyx mori L.) germplasm and identification of parents for breeding programme

In the present study, polyvoltine germplasm stock ofAndhra Pradesh State Sericulture Research and Development, Institute （APSSRDI） was evaluated for its performance based on quantitative and qualitative traits. Twenty-one oval and 10 peanut cocoon shaped lines were reared in different seasons of the year. Since the polyvoltines are non-diapausing, six generations were reared and evaluated for various economically important traits based on evaluation index and sub-ordinate function statistical methods. Ten top ranked lines obtained by using both the methods were identified as potential parental strains. Among oval lines, APMI4, APMI 1, APMIS, APMW9, and APMI9, and among peanut lines APMD5, APMDI, APMD3, APMD9 and APMD8 were selected as base material. The identified high yielding lines will be used in various breeding programmes as initial parents for the synthesis of superior polyvoltine breeds/hybrids.

Backfill support＇s backfill and operation properties and evaluation

To ensure compacted backfilling, it is essential to ensure the reliability of the performance of a solid backfill support, key equipment for integrating backfilling and mining. To evaluate the backfilling performance of a backfill support, the concept of backfill and operation properties is proposed in this study. Moreover, it is elaborated in terms of five aspects, namely, structural property, supporting property, tamping property, mechanical response property, and geological adaptation property, which are specifically reflected by 14 indexes including the supporting intensity and vertical roof gap. Seven separate evaluation indexes are selected to build a backfill and operation properties based system for evaluating the design schemes of the backfill support via a multi-index comprehensive evaluation method; then, the evaluation method and process together with measures to control the backfill and operation properties are proposed. By using this system, 11 schemes for optimizing the ZC5200/14.5/3 backfill support at Zhaizhen Coal Mine are evaluated, and scheme #10 is found to show superior vertical roof gap and other backfill and operation properties, thus demonstrating the reasonability of the evaluation system. On this basis, the backfill support research framework of designing initial scheme, optimizing design scheme, selecting the best evaluation indexes, evaluating optimizing scheme, and evaluating operation properties is built; this should serve as an important reference for further studies on the roof controlling performance of a backfill support.

Some Asymptotic Properties for Multivariate Partially Linear Models

The paper considers a multivariate partially linear model under independent errors,and investigates the asymptotic bias and variance-covariance for parametric component βand nonparametric component F（·）by the GJS estimator and Kernel estimation.

An attribute recognition model based on entropy weight for evaluating the quality of groundwater sources

In our study, entropy weight coefficients, based on Shannon entropy, were determined for an attribute recognition model to model the quality of groundwater sources. The model follows the theory previously proposed by Chen Q S. In the model, firstly, the author establishes the attribute space matrix and determines the weight based on Shannon entropy theory; secondly, calculates attribute measure; thirdly, evaluates that with confidence criterion and score criterion; finally, an application example is given. The results show that the water quality of the groundwater sources for the city comes up to the grade II or III standard. There is no pollution that obviously exceeds the standard and the water can meet people’s needs .The results from an evaluation of this model are in basic agreement with the observed situation and with a set pair analysis (SPA) model.

Assessment of potential impacts to surface and subsurface water bodies due to longwall mining

Ground movements due to longwall mining operations have the potential to damage the hydrological balance within as well as outside the mine permit area in the form of increased surface ponding and changes to hydrogeological properties. Recently, the Office of Surface Mining, Reclamation and Enforcement(OSMRE) in the USA, has completed a public comment period on a newly proposed rule for the protection of streams and groundwater from adverse impacts of surface and underground mining operations(80 FR 44435). With increased community and regulatory focus on mining operations and their potential to adversely affect streams and groundwater, now there is a greater need for better prediction of the possible effects mining has on both surface and subsurface bodies of water. With mining induced stress and strain within the overburden correlated to changes in the hydrogeological properties of rock and soil, this paper investigates the evaluation of the hydrogeological system within the vicinity of an underground mining operation based on strain values calculated through a surface deformation prediction model. Through accurate modeling of the pre- and post-mining hydrogeological system, industry personnel can better depict mining induced effects on surface and subsurface bodies of water aiding in the optimization of underground extraction sequences while maintaining the integrity of water resources.

Risk Assessment of Secondary Geological Disasters Induced by the Yushu Earthquake

The Yushu Ms 7.1 earthquake occurred on April 14,2010 in Qinghai Province,China.It induced a mass of secondary geological disasters,such as collapses,landslides,and debris flows.Risk assessment maps are important for geological disaster prevention and mitigation,and also can serve as a guide for post-earthquake reconstruction.Firstly,a hazard assessment index system of secondary geological disasters in the earthquake region was built in this paper,which was based on detailed analysis of environmental and triggering factors closely related to geological disasters in the study area.GIS technology was utilized to extract and analyze the assessment index.Hazard assessment maps of secondary geological disasters were obtained by spatial modeling and overlaying analysis.Secondly,an analysis of the vulnerability of hazard bearing bodies in the area was conducted,important information,such as, population density,percentage of arable land, industrial and agricultural outputs per unit area were regarded as assessment indices to evaluate socioeconomic vulnerability.Thirdly,the risk level of secondary geological disasters of the area was obtained by the formula:Risk=Hazard×Vulnerability. Risk assessment maps were categorized into four levels,including"low","moderate","high"and"very high".These results show that some urban areas are at very high risk,including Jiegu,Chengwen,Xiaxiula and Sahuteng towns.This research can provide some references and suggestions to improve decisionmaking support for emergency relief and post- earthquake reconstruction in the study area.

Vulnerability of Water Resources and Its Spatial Heterogeneity in Haihe River Basin, China

To manage water resources effectively, a multiscale assessment of the vulnerability of water resources on the basis of political boundaries and watersheds is necessary. This study addressed issues on the vulnerability of water resources and provided a multiscale comparison of spatial heterogeneity under a climate change background. Using improved quantitative evaluation methods of vulnerabil- ity, the Theil index and the Shannon-Weaver index, we evaluated the vulnerability of water resources and its spatial heterogeneity in the Haihe River Basin in four scales, namely, second-class water resource regions （Class II WRRs）, third-class water resource regions （Class III WRRs）, Province-Class II WRRs, and Province-Class III WRRs. Results show that vulnerability enhances from the north to south in the different scales, and shows obvious spatial heterogeneity instead of moving toward convergence in multiscale assessment results. Among the Class II WRRs, the Tuhai-Majia River is the most vulnerable area, and the vulnerability of the Luanhe River is lower than that of the north of the Haihe River Basin, which in turn is lower than that of the south of the Haihe River Basin. In the scales of Class III WRRs and Province-Class III WRRs, the vulnerability shows obvious spatial heterogeneity and diversity measured by the Theil index and the Shannon-Weaver index. Multiscale vulnerability assessment results based on political boundaries and the watersheds of the Haihe River Basin innovatively provided in this paper are important and useful to characterize the real spatial pattern of the vulnerability of water resources and improve water resource management.

Assessment of rapid impact compaction in ground improvement from in-situ testing

Ground improvement has been used on many construction sites to densify granular materials, in other word, to improve soil properties and reduce potential settlement. This work presents a case study of ground improvement using rapid impact compaction （RIC）. The research site comprises the construction of workshop and depots as part of railway development project at Batu Gajah-Ipoh, Malaysia. In-situ testing results show that the subsurface soil comprises mainly of sand and silty sand through the investigated depth extended to 10 m. Groundwater is approximately 0.5 m below the ground surface. Evaluation of improvement was based on the results of pre- and post-improvement cone penetration test （CPT）. Interpretation software has been used to infer soil properties. Load test was conducted to estimate soil settlement. It is found that the technique succeeds in improving soil properties namely the relative density increases from 45% to 70%, the friction angle of soil is increased by an average of 3°, and the soil settlement is reduced by 50%： The technique succeeds in improving soil properties to approximately 5.0 m in depth depending on soil uniformity with depth.

A New Social and Technological Paradigm to Assess Chronic Patient Management Process： Preliminary Results

The present research intends to address in a comprehensive, transversal, and interdisciplinary manner the chronic patient management process in the research project named ＂PRO DOMO SUD＂ in order to identify operational inefficiencies, thus demonstrating that these are largely attributable to incurred costs and, thus, evaluate possible solutions for providing effective and appropriate responses by healthcare and social services. Can patients/older people be treated, monitored, and managed successfully with mobile and wearable technologies？ The project involved three different groups of patients/participants： Patients with heart failure shock in ＂Home Monitoring Scenario＂; Patients with different pathologies in ＂Virtual Ward Scenario＂; Patients with limited mobility due to Neurological and Orthopaedic disease in ＂Rehabilitation Scenario＂. Due to the complexity of the issue, the methodological approach adopted must be multidimensional and interdisciplinary, addressing the complexity of the chronic patient from all viewpoints, not reducing it, yet analysing, understanding, rearranging, and managing it in an organic manner. The three different scenarios were allowed to identify several impacts on organizational and clinic management of chronic diseases, the tests showed significant improvements in quality of life of patients enrolled in the project. The data deriving from the three scenario demonstrate that wearable divide and ICT, in general, can empower both patients and physician personnel allowing them to be active part in the chronic disease management process. The PRO DOMO SUD experience derived from the Living Lab, this is a new paradigm for industrial research and development activities which allows the final users to actively collaborate with the designers and technicians in the development and test of new products and services aimed to them. The Living Labs stimulate social innovation by transferring research results from the closed industrial laboratory towards real life contexts where citizens and users become co-developers.

Zooplankton community structure in relation to environmental factors and ecological assessment of water quality in the Harbin Section of the Songhua River

To study the relationship between zooplankton community structure and environmental factors and water quality in the Harbin Section of the Songhua River,investigations were carried out in June,August,and October 2011.Canonical correspondence analysis(CCA) and saprobic indices were used to process and analyze the data.Seasonal variability was identified as a significant source of variation,which explains the fluctuation in zooplankton density.In autumn,the dry season,water residence time increased and zooplankton biomass and abundance accumulated in the slow flowing waters.Zooplankton abundance increased when food conditions improved.Therefore,the total zooplankton abundance in autumn is much higher than that in spring and summer.According to the saprobic indices,all the sample sites had mesosaprobic water and water quality was worse in autumn.CCA revealed that temperature accounted for most of the spatial variation in the zooplankton community.Moreover,pH,dissolved oxygen saturation,and turbidity were important factors affecting zooplankton community distribution.

Rock mechanical investigation of strata loading characteristics to assess caving and requirement of support resistance in a mechanized powered support longwall face

Longwall mining is one of the most acclaimed and widely used in underground method for coal extraction. The interaction of powered supports with the roof is the key issue in strata mechanics of longwall mining. Controlled caving of rock mass is a prerequisite pro thriving exploitation of coal deposits by longwall retreat with caving technique and support resistance has evolved as the most promising and effective scientific tool to predict various aspects related to strata mechanics of such workings. Load density,height of caving block, distance of fractured zone ahead of the face, overhang of goaf and mechanical strength of the debris above and below the support base have been found to influence the magnitude of load on supports. Designing powered support has been attempted at the different countries in different methods. This paper reviews the mechanism of roof caving and the conventional approaches of caving behaviour and support resistance requirement in the context of major strata control experiences gained worldwide. The theoretical explanation of the mechanism of roof caving is still continuing with consistently improved understanding through growing field experiences in the larger domain of geo-mining conditions and state-of-art strata mechanics analysis and monitoring techniques.

Application of rigorous coupled-wave theory on quality analysis of natural jadeite

In order to make more available methods for natural jadeite quality evaluation,this study applied rigorous coupled wave theory to calculate and simulate the reflection characteristics of various natural jadeites,and establish evaluation standard based on the relationship between refractive index and reflectivity and responses of reflection efficiency to refractive index,grating thickness and incident angles,etc.The results suggest that reflection efficiency varies significantly as a function of the natural jadeite quality,which can provide a new method to evaluate natural jadeite.

Relative floatability as a criterion for evaluating the separation performance of phosphate from iron

This work was aimed to study the relative floatability of phosphate flotation by means of kinetic analysis.The relative floatability is important to determine how selectively the phosphate is separated from its impurities. The effects of pulp pH, solid content, reagents dosage(depressant, collector and co-collector) and conditioning time were investigated on the ratio of the modified rate constant of phosphate to the modified rate constant of iron(relative floatability). The results showed that a large dosage of depressant associated with a low value of collector resulted in a better relative floatability. Increasing the co-collector dosage, conditioning time and pH increased the relative floatability up to a certain value and thereafter resulted in diminishing the relative floatability. Meanwhile, the results indicated that increment of solid concentration increased the relative floatability in range investigated. It was also found that that maximum relative floatability(16.05) could be obtained in pulp pH, 9.32, solid percentage, 30,depressant dosage, 440 g/t, collector dosage, 560 g/t, co-collector dosage, 84.63 g/t and conditioning time,9.43 min.

A study evaluating the impact of nerve preserving surgery and adjuvant pelvic irradiation for rectal cancer on quality of life

Objective： Preservation of the pelvic autonomic nerves in order to lower bladder and sexual dysfunction after radical rectal cancer surgery ＆ to evaluate functional outcome, local recurrence. Methods： A prospective study was under- taken on Egyptian patients. Forty one patients participated in the study in the period from December 2002 till June 2004 where they underwent radical surgery but with preservation of the pelvic autonomic nerves this was followed by adjuvant pelvic radiotherapy. Results： Six months, 1-year and 2-year follow-up of urinary function was complete in 32 out of 41 （78%）, 30 out of 41 （73%） and 27 out of 41 patients （65%） respectively There was no statistically significant correlation between the extent of nerve preservation and the reported minor voiding dysfunction. None of the patients reported major incontinence. Six months, 1-year and 2-year follow-up of sexual function revealed that 22 out of 41 patients （53%） were sexually active. Three out of 41 patients （7.3%） developed local recurrence. 38 （92.7%） patients were free of local recurrence, regarding pa- tients who received adjuvant radiotherapy 3 out of the 34 （8.8%） patients developed local pelvic recurrence while 9 patients （26.5%） developed distant metastases （3 of them did not receive adjuvant chemotherapy）, while patients who received adju- vant chemotherapy, 2 out of 20 patients （10%） developed local recurrence while distant metastases developed in 6 patients （30%）. Conclusion： Preservation of the pelvic autonomic nerves minimizes bladder and sexual dysfunction especially in male patients after rectal cancer surgery.