PVC塑料边角装饰护条技术与应用

PVC塑料因其原料资源充沛,物理性能和经济性能及装饰性能等综合因素均较好,已渗透到生活的各个角落,硬质PVC产品尤其走俏于建筑业。以其独特的耐候、耐蚀、防锈拒水等独特的优点而见长,它的强度、韧性等已使人们放心地以此来替代钢、木。

鞋眼加强护条

鞋眼在鞋带系紧和打结的过程中会承受相当大的拉伸力,如不能正确选择鞋眼的加强护条,将会造成鞋眼或鞋眼周边鞋帮的损坏。这是一个很容易受到忽视的问题,但这就足以使鞋的品质及厂商的声誉大打折扣。常用的三种主要类型的鞋眼。

传统工艺美术保护条例

第一条为了保护传统工艺美术,促进传统工艺美术事业的繁荣与发展,制定本条例.第二条本条例所称传统工艺美术,是指百年以上,历史悠久,技艺精湛,世代相传,有完整的工艺流程,采用天然原材料制作。

室内墙体PVC隐形护角施工技术

介绍了室内墙体PVC隐形护角施工技术的研究背景,结合工程实例,分析了该技术的特点、适用范围及技术原理,阐述了PVC隐形护角的施工工艺流程及操作要点,通过经济和社会效益分析,指出该技术施工便捷、成本低廉,符合当今绿色环保施工的理念。

双色条光缆的生产工艺流程和工艺改善

本文主要介绍了光缆产品护套双色条挤出技术。阐述了在多根光缆同槽或同管敷设时双色条外护在辨识度上的优势;简单的介绍了色条光缆的特点和色条挤塑的方法;详细介绍了双色条光缆的生产工艺流程、工艺改善和生产中可能出现的问题;最后分析了色条光缆未来的发展方向和发展前景。

白银市放射工作人员个人受照剂量水平监测

放射工作人员个人剂量水平监测是放射防护工作的一项重要手段,能真实反映放射工作人员的受照剂量,以利于评价放射防护效益和及早发现异常情况,防止对放射工作人员造成超剂量照射。为更好地改善防护条件,确保放射工作者的身体健康,我们于1995年对全市放射工作人员进行个人剂量监测,监测结果如下:

创面功能性敷料引流及皮肤吻合器对胆道术后感染切口愈合能力的影响

目的探讨使用创面功能性敷料引流和皮肤缝合器对胆道手术后感染切口愈合能力的影响。方法45例发生术后切口感染的剖腹胆道手术患者,根据处理方法的不同分为观察组(22例)和对照组(23例)。观察组的感染切口清创后使用护创液纱条引流联合一次性使用皮肤吻合器治疗,对照组在清创后采用0.9%氯化钠溶液纱条引流,感染控制后间断缝合手术切口。比较两组的感染切口愈合情况、局部或全身不良反应情况和随访复查情况。结果观察组患者的切口红肿及渗出消退时间、切口二次缝合时间和创面完全愈合时间均短于对照组,差异有统计学意义(P<0.05)。观察组86.4%的患者切口愈合外观较为平整、美观,瘢痕增生少,与对照组(56.5%)比较,差异有统计学意义(P<0.05)。两组的局部或全身不良反应发生率比较,差异无统计学意义(P>0.05)。两组患者均接受术后随访5~12个月,随访期间均未发现切口再感染、裂开、切口疝等并发症。结论胆道术后感染切口清创后使用护创液湿敷引流能够有效提高切口的愈合能力,感染控制后使用皮肤吻合器无创关闭手术切口,有利于加速切口愈合。

Involvement of cyclic electron flow in irradiance stress responding and its potential regulation of the mechanisms in Pyropia yezoensis

Pyropia yezoensis, belongs to the genus of P orphyra before 2011, inhabit on intertidal zone rocks where irradiation changes dramatically, implying that the seaweed has gained certain mechanisms to survive a harsh environment. Based on the photosynthetic parameters with or without the inhibitors determined by a Dual-PAM-100 apparatus, we investigated the photosynthetic performance and the changes in electron fl ow that occurred during the algae were stressed with dif ferent light intensities previously. When the irradiation saturation was approaching, the CEF around PS I became crucial since the addition of inhibitors usually led to an increase in non-photochemical quenching. The inhibitor experiments showed that there were at least three dif ferent CEF pathways in Py. yezoensis and these pathways compensated each other. In addition to maintaining a proper ratio of ATP/NAD(P)H to support effi cient photosynthesis, the potential roles of CEF might also include the regulation of dif ferent photoprotective mechanisms in Py. yezoensis. Under the regulation of CEF, chlororespiration is thought to transport electrons from the reduced plastoquinone(PQ) pool to oxygen in order to mitigate the reduction in the electron transfer chain. When irradiation was up to the high-grade stress conditions, the relative value of CEF began to decrease, which implied that the NADP+ pool or PQ + pool was very small and that the electrons were transferred from reduced PS I to oxygen. The scavenging enzymes might be activated and the water-water cycle probably became an ef fective means of removing the active oxygen produced by the irradiation stressed Py. yezoensis. We believe that the dif ferent mechanisms could make up the photoprotective network to allow Py. yezoensis for survival in a highly variable light stress habitat, which may enlighten scientists in future studies on irradiance stress in other algae species.

原煤预筛分系统研究与应用效果实践

煤矿原煤筛分系统是煤矿企业把原煤加工分级成符合市场需求产品的重要环节,原煤筛分系统的分级处理能力是企业实现效益最大化的重要保障。徐州矿务集团新疆天山矿业有限责任公司俄霍布拉克煤矿在原煤进入筛分系统前增设滑条筛、在原煤分级筛入料口增加筛条护板等相关技术升级改造项目,有效地保障了筛分系统的正常运转。

New Development of Port Structures Design and Construction

Some new innovative constructions and technologies for improvement of port structures are worked out and discussed. The aims of innovations are to increase structures＇ reliability, to decrease cost of construction and maintenance, to simplify technology and cost of building. For these purposes either some main bearing elements or structures in whole are modified or improved. In particular different improved waterfront constructions as well as retaining walls and coastal protection （gravity, piled, sheet piling, etc.） for use in various soil conditions are outlined. One of them incorporates trapezoidal blocks forming columns, each block in the column contacts the others either with smaller or larger bases. Another design incorporates blocks that are constructed with holes ran through the centres of gravity of the blocks. Rigid cylinder element running through the holes of several adjacent blocks allows them to be joined forming large size units, The structure consisting of wedge form retaining wall is original but simple to construct, Some new designs based on perfection of sheet-piling walls （sheet piles with curvilinear cross-section having a form of semi-rings） are proposed for different applications. Proposals on modernization of some traditional structures and technologies are discussed.

Application of fulllength anchor support technology in a largesection roadway under complicated geological conditions

Coal roadway support is the foundation and strong guarantee of safe coal production. With the FLAC3D numerical simulation, the roadway fulllength anchor support mechanism was studied, and the full-length anchor forcetransferring mechanism and stressfield distribution formed by roadway surrounding rocks were analyzed, which will provide a scientific basis for a support technology in large-section roadways under complicated geological conditions and lay a foundation for the popularization and application of a full-length anchor support system under special geological conditions.

Natural Hazard Preventinkon and the Mountain Land Risk Reduction in the Western Carpathians

The Western Carpathians are located out of world main natural hazardous zones. Human casualties are related more to snow avalanches in connection with mountain hiking, some individuals yearly by flooding and rarely by forest fires. Economic lost about 0.1 to 0.2 %, exceptionally up to 0.8 % of the gross domestic product (GDP) proportionally to the Carpathian regions of particular countries. Natural disasters are linked, except of the above mentioned events, to infrequent small and medium scale earthquakes, landslides, and erosion. Records of the most harmful natural events are found in archives since the 16th century. Their systematic study and factor analysis started from the end of the 19th century, and protective measures and organization of impact mitigation developed during the 20th century to minimize the risk.

Environmental Issues and Management for Hydropower Peaking Operations

Many hydropower plants are operated as peak generators or frequency controllers, because they can change their output quickly to follow the fluctuating power demand. When meeting peak load requirements, a power station is turned on at a particular time during the day, generates power at a constant load for a certain number of hours, and is then turned off or set to a different load for another time period, resulting in a high variability inflow discharges. Where reservoir hydro schemes are operated primarily to provide peak load services, there are particular environmental risks that should be considered in any environmental impact assessment. At a minimum these should focus on water quality, fluvial geomorphology, riparian vegetation, macro-invertebrate and fish communities underpinned by a sound hydrological analysis. Frequent temperature changes may occur downstream of a peaking power station; increased seepage-induced erosion of riverbanks due to frequent water level drawdowns; and impacts to macro-invertebrate and fish communities due to rapid and frequent in channel habitat conditions. With a sound understanding of the potential environmental issues, there are strategies that can be employed at the siting and design stage to minimize or mitigate these risks, including but not limited to minimum environmental flows, ramping rules, utilization of a re-regulation storage and localized treatment works.

Experimental Model for Biological Control of Stored Grain Pests

The insecticidal efficacy of the diatomaceous earth against granary weevil, Sitophilus granarius L. （Coleoptera： Curculionidae）, with two essential oils for the degree of repellent activity, was evaluated in an experimental model in laboratory tests. The diatomaceous earth was obtained from three Romanian sources （Patirlagele, Urloaia and Adamclisi） and was applied at four doses of 100, 300, 500 and 900 ppm （5, 15, 25 and 45 mg, respectively） on three replicates each variant. Mortality of S. granarius adults was estimated after 7, 14 and 21 d of exposure on treated grain. The insecticidal efficacy of the examined diatomaceous earth against the granary weevil was highly influenced by exposure time, dose and essential oil type. The longer exposure times increased weevil mortality in the case of low doses （100 ppm and 300 ppm）. After 60 d from the experiment initiation, the exposed grains from each variant were assessed about the progeny production. For the model proposed as bio-experiment, two essential oils in concentration of 80μL/L air and 125μL/L of Thymus vulgaris L. and Satureja hortensis L., respectively, were tested compared with untreated control in laboratory conditions. Both plant species belong to the family Lamiaceae, and the major active insecticidal compound was thymol among other providing to terpenoid class, such as eugenol and linalool. The species S. granarius chosen for experimental model was grown in the Research-Development Institute of Plant Protection （RDIPP） Bucharest bio-base. The results show that mortality induced from diatomaceous earth was at the level between 83.33% and 100% in all variants after 21 d, compared with untreated control and a standard product Silicosec.

Effect of Three Different Growth Media on Yield and Oil Constituents of Rosemary （Rosmarinus officinalis L.） under Protected Agriculture Conditions

Medicinal plants provide an important source of cure since ancient time. Poor soil resources, scarce and saline water and the harsh environment limited the production of plants in the Arabian Gulf countries. This study aimed to investigate the production potential of rosemary （Rosmarinus officinalis L.） grown on different growth media under greenhouse conditions. Three growth media agricultural soil, compost and hydroponic system were used, whereas tuff （inert volcanic material） was used as substrate. The result indicated that the high salinity of the agricultural soil limited growth and oil yield in rosemary. Shoot height increased in 11 weeks, by 62%, 65% and 114% in plants grown in agricultural soil, hydroponic system and compost, respectively. Na content in plants grown in agricultural soil was significantly higher than in plants grown in the other treatment. Essential oil yield in plants grown in compost exceeded those in agricultural soil by 114%. Essential oil content （0.66%-1.5% w/w） and chemical constituents concentrations did not change significantly with growth media. The main constituents, more or less, are comparable to essential oils constituents reported from other countries. In comparison, better yields are obtained for individual components of the oils of plants grown under our green house conditions. This study demonstrated the great potential of commercial production of rosemary in the greenhouse without compromising the oil quality and oil yield.

Research on characters of surrounding rock in complex geology conditions and supporting time

The methods combined by test, field monitoring and theoretical analysis were adopted to do the systemic research on the rock mass from micro-structure to macro-deformation, and rheological model of Jinchuan rock mass was established to discuss the reasonable supporting time. Resuhs show that supporting after suitable stress and displacement release can benefit for the long-term stability of surrounding rock.

Assessment of community health needs of Chongqing residents: a qualitative study

Objective: The aim of this preliminary qualitative study was to gain insight into community health needs in order to develop health program for community in Chongqing. Methods: Totally 40 participants were assigned into 6 focus group discussions. All groups were led by local language speakers, and their talking was recorded after gaining informed consent. Transcribed data were coded and subjected to thematic analysis. Results: The main obtained themes were that community health problems were chronic noncommunicable disease, main health service needs included regularly free check-up and health education, and perceived health risk factors were unhealthy lifestyle and behavior as well as environment problems. Conclusion: Our community health needs assessment (CHNA) with FGDs indicate that residents realize the importance of prevention of disease. Our study identifies that primarily community health promotion is one of the priorities of community health service needs, including reorienting health service, health education, guiding behavior or lifestyle, and creating healthy environments. The findings of this study can provide guidance to the development of more effective and pertinent health program in this community.

Study on Flexible Power Generation Device Using Piezoelectric Film

Various ocean energy technologies have been developed that harness several kinds of renewable energy resources of the ocean. However, these technologies suffer from problems such as high construction and maintenance costs, restrictive installation requirements and damage by extraordinary weather conditions. In this paper, we propose a lightweight and FPGD （flexible power generation device） that overcomes these problems. The FPGD essentially consists of piezoelectric films and silicon rubber. Because the FPGD is small and flexible, it is anticipated to efficiently convert fluid energy into electrical energy even when the fluid energy is low. We perform several experiments to confirm the effectiveness of the FPGD and we discuss the results.

Optimization of Protectant, Salinity and Freezing Condition for Freeze-Drying Preservation of Edwardsiella tarda

Novel preservation condition without ultra-low temperature is needed for the study of pathogen in marine fishes. Freeze-drying is such a method usually used for preservation of terrigenous bacteria. However, studies using freeze-drying method to preserving marine microorganisms remain very limited. In this study, we optimized the composition of protectants during the freeze-drying of Edwardsiella tarda, a fish pathogen that causes systemic infection in marine fishes. We found that the optimal composition of protectant mixture contained trehalose(8.0%), skim milk(12.0%), sodium citrate(2.0%), serum(12.0%) and PVP(2.0%). Orthogonal and interaction analyses demonstrated the interaction between serum and skim milk or sodium citrate. The highest survival rate of E. tarda was observed when the concentration of Na Cl was 10.0, 30.0 and between 5.0 and 10.0 g L^(-1) for preparing TSB medium, E. tarda suspension and protectant mixture, respectively. When E. tarda was frozen at-80℃ or-40℃ for 6 h, its survival rate was higher than that under other tested conditions. Under the optimized conditions, when the protectant mixture was used during freeze-drying process, the survival rate(79.63%–82.30%) of E. tarda was significantly higher than that obtained using single protectant. Scanning electron microscopy(SEM) image indicated that E. tarda was embedded in thick matrix with detectable aggregation. In sum, the protectant mixture may be used as a novel cryoprotective additive for E. tarda.

Revisiting of the South African Mine Workers＇ Union --A Significant Factor in South African Mining History

Founded in 1902 as the Transvaal Miners＇ Association, the South African Mine Workers＇ Union （MWU）, as it was renamed in 1913, rose to prominence as a militant union for white miners, especially during the turbulent years of industrial strife and bloody strike action in the first two decades of the 20th century. Since the election victory of the Pact government in 1924 a program of pro-white protectionist legislation was introduced. As South Africa＇s most prominent white trade union of the 20th century, the MWU therefore became renowned for defending job reservation in the mining industry. After 1948, it enjoyed the National Party government＇s support in this regard. However, skilled labor shortages and changing labor conditions in the 1970s forced the government to introduce labor reform. Job reservation was scrapped and black unions were officially recognized. These initiatives put the MWU on a confrontational path with the government and the union aligned itself with right-wing political resistance and protest. But, the altered political and economic South African realities after 1994 forced the MWU to rethink its strategies. By 2002, it had reinvented and transformed itself into Solidarity, adequately equipped for addressing the labor challenges and demands of a post-apartheid South Africa. This article, based on the author＇s research of the South African labor movement in the early 20th century, traces the historical development of the union and its influence on South African political and labor history.