“破墙开围”政策的法律调适——基于财产权社会化的视角

政府提出"拆围墙",目的是为了解决城市交通拥堵问题,符合"物权社会化"的现代法治理念,是针对业主或单位内部道路土地使用权的"物权行使限制",具有法律可行性。但是,我们也要切实保障相关业主或单位所拥有的物权权益,应当只在必需的情况下才实施"拆围墙",且应当尽量避免对于利害关系人的负面影响;同时,还需要加强方案制定过程中的民主参与程序建设以及损害救济途径的完善。

肺功能不全患者开胸手术的围术期护理

肺功能不全是指肺疾病或呼吸系统调节功能障碍,导致呼吸运动不能满足气体交换,出现动脉血氧减少或伴有二氧化碳潴留。本院对78例肺功能不全患者展开围术期护理管理,取得良好效果,现报道如下。1临床资料本组老年患者78例,男56例,女22例,年龄60～79岁;肺癌49例,食管贲门癌29例,主要症状有咳嗽、咳痰或血痰、胸痛、胸闷、气短及发热等。本组有吸烟史者63例,最大烟量60支/d,最长吸烟史55年；慢性支气管炎或肺气肿者34例；肺结核者8例。术前肺功能检查均为阻塞性或混合性通气功能障碍。按肺功能障碍轻、中、重度分类，轻度64例，中度13例，重度1例。术后呼吸系并发症6例，其中呼吸功能不全4例，肺不张1例，胸腔积液1例。

开孔围壳流激振动特性的试验与数值计算研究

对围壳模型进行试验与数值模拟,分析开孔对围壳流激振动特性的影响。首先进行无动力自由上浮试验,在试验中测得了一系列的振动加速度线谱,然后建立与试验相同的数值计算模型,采用大涡模拟法对围壳附近的流场进行了精细的模拟,并将流场的压力作为载荷,运用FEM/BEM结合的方法计算了围壳的流激振动。仿真结果表明,该方法可以清晰的模拟流激围壳振动现象,围壳开孔后会引起流场周期性振荡,从而激励结构振动,产生振动加速度线谱,数值方法计算的振动线谱频率和试验结果接近,平均误差为1.41%。流激开孔围壳振动集中在开孔的导边与随边,尤其是孔腔随边,对这些区域采取控制措施是下一步研究目标。

术前应用曲马多对肺癌患者开胸手术围术期免疫功能的影响研究

目的研究术前应用曲马多对肺癌患者开胸手术围术期免疫功能的影响。方法选择2012年6月至2014年6月接诊的100例肺癌患者进行研究。随机分为两组,每组50例。观察组在麻醉诱导后应用曲马多和恩丹西酮。对照组在麻醉诱导后只应用恩丹西酮。比较两组患者术后视觉模拟(VAS)评分和T淋巴细胞亚群(CD3+、CD4+、CD4+/CD8+)和NK细胞的变化。结果观察组术后0 h和术后2 h的VAS评分均低于对照组,二者相比差异有统计学意义(P<0.05);较麻醉诱导后,手术完毕后观察组与对照组的CD3+、CD4+、CD4+/CD8+均有下降,差异有统计学意义(P<0.05);手术完毕后,两组患者的CD3+、CD4+的比率相比较无统计学差异(P>0.05);观察组的CD4+/CD8+和NK细胞含量均明显高于对照组,两组比较有统计学意义(P<0.05)。结论术前应用曲马多对肺癌患者开胸手术围术期免疫功能的影响主要是使患者的NK细胞比率增高,从而有利于免疫系统的恢复。

董氏奇穴开四关治疗围绝经期抑郁症患者的临床观察

目的:评价董氏奇穴开四关治疗围绝经期抑郁症患者的临床疗效。方法:采用随机1∶1信封法,将2021年3月至2021年9月于本社区诊治的围绝经期抑郁症患者78例分为治疗组与对照组,各39例。对照组给予常规中药治疗,治疗组在对照组基础上加用董氏奇穴开四关治疗。对比两组汉密尔顿抑郁量表(Hamilton Depression Scale-17,HAMD-17)、匹兹堡睡眠质量指数(Pittsburgh sleep quality index,PSQI)和中医证候量表评分变化。结果:两组治疗后HAMD-17、PSQI和中医证候分评均显著低于治疗前(P<0.05),且治疗组各指标评分显著低于对照组(P<0.05)。治疗后治疗组与对照组的总有效率分别为92.31%(36/39)和74.36%(29/39),治疗组疗效显著高于对照组(P<0.05)。结论:董氏奇穴对围绝经期抑郁症患者疗效确切,可作为治疗围绝经期抑郁症的方法。

锚索网支护在复合围岩下开切眼的应用

介绍了锚索网支护在复合围岩情况下的设计理论,以东坡矿702工作面锚索网支护在复合围岩下开切眼为例,从多方面分析了锚索网支护在复合围岩下开切眼应用的优越性。

论清代盛京围场管理及其演变

有清一代,为保证演武行围及皇室贡品,统治者在东北建置盛京围场禁地并设专门的机构进行严格管理,对私入围场打猎、垦田的行为施以惩处。雍乾嘉道时期频繁地修改惩处条例,反映了此时围场内偷盗伐猎问题的严重性。道光以后,清政府面临着内忧外患,财政危机严重,加之越来越多的流民进入东北,作为“禁中之禁”的盛京围场便被迫开放,直至清朝灭亡,盛京围场最终解体。

护理干预对围手术期氧驱雾化吸入祛痰的治疗效果观察

目的:探讨护理干预在围手术期氧驱雾化吸入祛痰应用的效果。方法:选取2012年3月～2013年6月期间我院收治的开胸手术患者68例,随机分为干预组与观察组,干预组在常规护理的基础上给予护理干预,观察组给予常规护理,比较效果。结果:观察组总有效率65.62%,干预组总有效率94.44%(P<0.01)。结论:护理干预用于围手术期氧驱雾化吸入,使雾化吸入祛痰治疗效果有了大幅度的提高(总有效率94.44%),达到了预防和减少肺部并发症的发生的目的。

非对称围壁加强对耐压圆柱壳孔口应力影响分析

由于单壳体水下航行器开孔加强结构受到外形限制,需采用非对称的围壁进行加强。本文采用数值分析方法,建立典型单壳体开孔非对称围壁加强结构有限元模型,开展仿真分析研究。通过调整非对称围壁高度,对比分析圆柱壳开孔孔边应力值,研究不同高度围壁对于孔边应力集中的影响,获得了非对称围壁加强结构的应力变化趋势,并与对称围壁加强结果进行对比,探究了适用于非对称围壁加强的设计方法,为以后工程设计提供技术支撑。

Stability classification model of mine-lane surrounding rock based on distance discriminant analysis method

Based on the principle of Mahalanobis distance discriminant analysis (DDA) theory, a stability classification model for mine-lane surrounding rock was established, including six indexes of discriminant factors that reflect the engineering quality of surrounding rock: lane depth below surface, span of lane, ratio of directly top layer thickness to coal thickness, uniaxial comprehensive strength of surrounding rock, development degree coefficient of surrounding rock joint and range of broken surrounding rock zone. A DDA model was obtained through training 15 practical measuring samples. The re-substitution method was introduced to verify the stability of DDA model and the ratio of mis-discrimination is zero. The DDA model was used to discriminate 3 new samples and the results are identical with actual rock kind. Compared with the artificial neural network method and support vector mechanic method, the results show that this model has high prediction accuracy and can be used in practical engineering.

Analysis of stability of support and surrounding rock in mining top coa of inclined coal seam

The study analyzes the characteristics of roof movement in mining top coal of inclined coal seam,and establishes the mechanical model of support and surrounding-rock stability in inclined coal seam.Besides,this study carries out the numerical calculation and field observation of roof movement and support stability,and provides the critical control measures.The results show that the fracture firstly appears in middle-upper roof and extends upwards in top coal caving in inclined coal seam;regular and irregular caving zones appear in middle-upper stress concentration region,and the asymmetric caving arch is finally formed.Support load of middle-upper working face is larger than that of the middle-lower face;dynamic load coefficient of upper support is large,and the load on the front of support is larger than that on the rear of it,which leads to poor support stability.Stability of support and surrounding-rock system depends mainly on upper-support stability.

Numerical simulation and experimental research of surrounding rock deformation of floor roadway under short-distance coal seam group combined mining

According to the influence of the combination of short-distance coal seam group on mining roadway, using numerical simulation software FLAG2D to draw the abutment pressure distribution ahead the working face and the area of influence in fully-mechanized mining conditions, the variation rules of surrounding rock supporting pressure of floor roadway and the deformation rules were summarized. GYS-300 anchor dynamometer was used to measure the roadway surface displacement, and the conclusions of numerical simulation were verified.

Dynamic characteristics of high stressed red sandstone subjected to unloading and impact loads

In the process of deep projects excavation,deep rock often experiences a full stress process from high stress to unloading and then to impact disturbance failure.To study the dynamic characteristics of three-dimensional high stressed red sandstone subjected to unloading and impact loads,impact compression tests were conducted on red sandstone under confining pressure unloading conditions using a modified split Hopkinson pressure bar.Impact disturbance tests of uniaxial pre-stressed rock were also conducted(without considering confining pressure unloading effect).The results demonstrate that the impact compression strength of red sandstone shows an obvious strain rate effect.With an approximately equal strain rate,the dynamic strength of red sandstone under confining unloading conditions is less than that in the uniaxial pre-stressed impact compression test.Confining pressure unloading produces a strength-weakening effect,and the dynamic strength weakening factor(DSWF)is also defined.The results also indicate that the strain rate of the rock and the incident energy change in a logarithmic relation.With similar incident energies,unloading results in a higher strain rate in pre-stressed rock.According to the experimental analysis,unloading does not affect the failure mode,but reduces the dynamic strength of pre-stressed rock.The influence of confining pressure unloading on the shear strength parameters(cohesion and friction angle)is discussed.Under the same external energy impact compression,prestressed rock subjected to unloading is more likely to be destroyed.Thus,the effect of unloading on the rock mechanical characteristics should be considered in deep rock project excavation design.

The instability mechanics of surrounding rock-coal mass system in longwall face and the prevention of pressure bumps

According to the movement and change rules of mechanical structure of surrounding rock coal mass system during coal excavation, the mechanism of sudden instability and damage was found out. The criterions that distinguishing the occurring of the pressure bump were put forward. This criteria have been applied successfully in the comprehensive prevent of pressure bumps in Tangshan colliery.

Short-and long-term results of endoscopic ultrasoundguided transmural drainage for pancreatic pseudocysts and walled-off necrosis

AIM To evaluate the short-and long-term results of endoscopic ultrasound-guided transmural drainage(EUS-GTD) for pancreatic fluid collection(PFC) and identify the predictive factors of treatment outcome for walled-off necrosis(WON) managed by EUS-GTD alone.METHODS We investigated 103 consecutive patients with PFC who underwent EUS-GTD between September 1999 and August 2015. Patients were divided into four groups as follows: WON(n = 40), pancreatic pseudocyst(PPC; n = 11), chronic pseudocyst(n = 33), and others(n = 19). We evaluated the short-and long-term outcomes of the treatment. In cases of WON, multiple logistic regression analyses were performed to identify the predictor variables associated with the treatment success. In addition, PFC recurrence was examined in patients followed up for more than 6 mo and internal stent removal after successful EUS-GTD was confirmed.RESULTS In this study, the total technical success rate was 96.1%. The treatment success rate of WON, PPC, chronic pseudocyst, and others was 57.5%, 90.9%, 91.0%, and 89.5%, respectively. Contrast-enhanced computed tomography using the multivariate logistic regression analysis revealed that the treatment success rate of WON was significantly lower in patients with more than 50% pancreatic parenchymal necrosis(OR = 17.0; 95%CI: 1.9-150.7; P = 0.011) and in patients with more than 150 mm of PFC(OR = 27.9; 95%CI: 3.4-227.7; P = 0.002).The recurrence of PFC in the long term was 13.3%(median observation time, 38.8 mo). Mean amylase level in the cavity was significantly higher in the recurrence group than in the no recurrence group(P = 0.02).CONCLUSION The reduction of WON by EUS-GTD alone was associated with the proportion of necrotic tissue and extent of the cavity. The amylase level in the cavity may be a predictive factor for recurrence of PFC.

Deformation control of asymmetric floor heave in a deep rock roadway:A case study

In order to control asymmetric floor heave in deep rock roadways and deformation around the surrounding rock mass after excavation, in this paper we discuss the failure mechanism and coupling control countermeasures using the finite difference method （FLAC^3D） combined with comparative analysis and typical engineering application at Xingcun coal mine, It is indicated by the analysis that the simple symmetric support systems used in the past led to destruction of the deep rock roadway from the key zone and resulted in the deformation of asymmetric floor heave in the roadway. Suitable rein- forced support countermeasures are proposed to reduce the deformation of the floor heave and the potential risk during mining. The application shows that the present support technology can he used to better environmental conditions. The countermeasures of asymmetric coupling support can not only effectively reduce the discrepancy deformation at the key area of the surrounding rock mass, hut also effectively control floor heave, which helps realize the integration of support and maintain the stability of the deep rock roadways at Xingcun coal mine.

Reliability analysis of tunnel surrounding rock stability by Monte-Carlo method

Discussed advantages of improved Monte-Carlo method and feasibility about proposed approach applying in reliability analysis for tunnel surrounding rock stability.On the basis of deterministic parsing for tunnel surrounding rock,reliability computing method of surrounding rock stability was derived from improved Monte-Carlo method.The com- puting method considered random of related parameters,and therefore satisfies relativity among parameters.The proposed method can reasonably determine reliability of sur- rounding rock stability.Calculation results show that this method is a scientific method in discriminating and checking surrounding rock stability.

Urban Expansion in China Based on Remote Sensing Technology：A Review

Urban areas and its evolution are important anthropogenic indicators and human ecological footprints, and play decisive roles in environmental change analysis, global geo-conditional monitoring, and sustainable development. China has the highest rate of urban expansion and has emerged as an urban expansion hotspot worldwide. In this paper, the progress of studies on Chinese urban expansion based on remote sensing technology are summarized and analyzed from the aspects of urban area definition, remotely sensed imagery applied in urban expansion, monitoring methods of urban expansion, and urban expansion applications. Existing issues and future directions of Chinese urban expansion are discussed and proposed. Results indicate that: 1) The fusion of multi-source remotely sensed imagery is imperative to meet the needs of urban expansion with various monitoring terms and frequencies on different scales and dimensions. 2) To guarantee the classification accuracy and efficiency and describe urban expansion and its influences on local land use simultaneously, the combination of visual interpretation and automatic classification is the tendency of future monitoring methods of urban areas. 3) Urban expansion data have become the prerequisite for recognizing the urban development process, excavating its driving forces, simulating and predicting the future development directions, and also is conducive to revealing and explaining urban ecological and environmental issues. 4) In the past decades, Chinese scholars have promoted the application of remote sensing technology in the urban expansion field, with data construction, methods and models developing from the quotation stage to improvement and innovation stage; however, an independent and consistent urban expansion data on the national scale with long-term and high-frequency(such as annual monitoring) monitoring is still lacking.

Experimental study on the bolt–cable combined supporting technology for the extraction roadways in weakly cemented strata

Aiming at the characteristics of the poor steady ability, the short stable time and severe deformation behavior of weakly cemented soft surrounding rock around extraction roadway, a bolt–cable combined supporting technology was proposed. Numerical simulation was performed by using FLAC3 D software to study the effects of different supporting systems. The simulation result proves that those supporting systems have good practical values. Based on real-time monitoring and analysis of the deformation of surrounding rock and the stress of supporting structure, real time information of deformation of surrounding rock and stress state of supporting structure of extraction roadway within weakly cemented strata was obtained. Monitoring results show that large deformation and failure of surrounding rock of extraction roadway within weakly cemented strata can be effectively controlled by the bolt–cable combined supporting technology, which ensures the long-term stability and safety of surrounding rock and supporting structure.