胸腹腔引流袋固定布套的制作与应用

晚期恶性肿瘤患者常在日间引流癌性胸腹水,夜间夹闭,这样常使患者在床上翻身受限,影响其睡眠质量。鉴此,我科设计了一种简易胸腹腔引流袋（夹闭后）固定布套,经应用,效果满意,介绍如下。

一次性无纺布套床刷在层流病房的应用

层流病房主要是用来防止骨髓移植、烧伤、重大手术及白细胞低下等患者的感染。患者的生活与治疗均在其中进行，为保证层流室的洁净程度，防止传统棉质清洁抹布在使用中纤维脱落产生尘埃颗粒成为细菌的载体，我们采用一次性无纺布套床刷代替传统的毛巾用于层流病房物体表面的清洁，取得较好效果。现介绍如下。1材料与方法采用含消毒液的一次性医用无纺布床刷刷套及刷子，按层流房间的多少每室配床刷一把、一次性医用无纺布套若干，使用时将刷套套于刷子上，燃后按清洁物的需要对层流病房物体表面进行清洁与消毒。一次性无纺布套使用后，按医疗废物运出处理。床刷做到每位患者固定使用，定期和终末消毒。2效果与体会传统方法采用毛巾或棉布清洁物体表面，使用一定时间后，易在被清洁物体的表面留下细小的纤维和毛绒粉尘，其在层流室内会随室内气流在空中挥舞成为细菌的载体，如脱落在诊疗用品上随侵入性操作带入患者体内，极易引起住在层流病房的高危患者发生感染。一次性医用无纺布套带用于层流病房物体表面清扫，有清洁和消毒的双重作用，而且最主要的优点是使用后不产生纤维粉尘遗留在物体表面，不影响室内空气质量，不用消耗小毛巾、消毒液、洗涤剂与支付清洗消毒的相关费用，符合湿式清扫和医院感染控制的要求，值得临床推广应用。

一次性无纺布套湿式扫床效果观察

用一次性无纺布套与棉布套套床刷行湿式扫床，对扫床前后室内空气细菌含量及扫床后床单表面、套内床刷菌落数进行对比。结果：一次性无纺布套与棉布套扫床效果相当。一次性无纺布套具有灭菌彻底、成本低、避免交叉感染等优点，值得临床推广使用。

介绍一种术中上肢输液约束布套

手术中输液往往需要选择大血管、粗针头、多静脉通路来保证手术顺利进行。但有时由于患者疼痛或不配合，易使上肢脱离手术床托臂架，导致针头脱出。为此我们制作了一种上肢输液约束布套，经临床使用１６８例，效果良好。介绍如下。１材料长５５ｃｍ、宽３２ｃｍ双层白色棉...

布套式空调装置中布的选择

在布套式空调装置中,布风道系统阻力的大小直接影响到装置的噪声及电耗,因此布的选择是布套式空调装置设计中的关键问题。由浙江省上虞风机厂试制的 BK 型布套式空调装置,于八三年四月首次在上海市川沙县食品公司试用,同年七月由中国食品公司通过鉴定。在设计中该厂与上海市食品公司先后在有关纺织品,从几百种布中挑选了十一种不同透气性能的布,其中包括五种规格型号的布、尼龙、丝织等,分别在上虞风机厂气动性能试验室进行局部阻力系数与表面喷风口风速的测试。

布套式空调设备在食品加工业方面的应用

布套式空调与一般的空调系统的主要区别在于所使用的送风管道不同,它不是直接使用刚性风管把风送到空调空间,而是用一种粗质人造化纤织物制成的(方形或园形)布袋式风管,经过空调设备处理的风在这种风管内利用静压均匀渗到空调间内。这种布套式空调的主要特点是: (1)气流均匀平稳而不会感觉到明显的阵风现象。 (2)在负荷变化大的情况下不会出现气流和温度的大波动问题。

Geostress measurements near fault areas using borehole stress-relief method

To minimize negative effects of geostress distribution on mining safety near the fault areas, the UPM40 triaxial geostress testing system was introduced to conduct in-situ geostress measurements at three sites and nine points by the borehole stress-relief method. The results of strain?confining pressure curves show that rock masses at the three measuring sites exhibit comprehensive linear elasticity in spite of various fissures or cracks within rocks. Horizontal and vertical stress components distribute discrepantly near the fault areas, and the maximum lateral pressure coefficient is as high as 6.15. The maximum principle stress ranges from 8.01 to 14.93 MPa, and stress directions are in the range of N78.07°W?N17.55°W. Geostresses near fault areas are dominated by the horizontal tectonic stresses, while the lower values, compared to those under similar geological conditions are due to stress release by the fault. Additionally, the fault and shear stress nearby are partially responsible for asymmetric elongation and southwesterly migration of orebodies.

Seismic strengthening of reinforced concrete columns damaged by rebar corrosion using combined CFRP and steel jacket

In order to study the effectiveness of combined carbon fiber-reinforced polymer （CFRP） sheets and steel jacket in strengthening the seismic performance of corrosion-damaged reinforced concrete （RC） columns, twelve reinforced concrete columns are tested under combined lateral cyclic displacement excursions and constant axial load. The variables studied in this program include effects of corrosion degree of the rebars, level of axial load, the amount of CFRP sheets and steel jacket. The results indicate that the combined CFRP and steel jacket retrofitting technique is effective in improving load-carrying, ductility and energy absorption capacity of the columns. Compared with the corrosion-damaged RC column, the lateral load and the ductility factor of many strengthened columns increase more than 90% and 100%, respectively. The formulae for the calculation of the yielding load, the maximum lateral load and the displacement ductility factor of the strengthened columns under combined constant axial load and cyclically increasing lateral loading are developed. The test results are also compared with the results obtained from the proposed formulae. A good agreement between calculated values and experimental results is observed.

Computational screening of O‐functional MXenes for electrocatalytic ammonia synthesis

The nitrogen reduction reaction(NRR)using new and efficient electrocatalysts is a promising al‐ternative to the traditional Haber‐Bosch process.Nevertheless,it remains a challenge to design efficient catalysts with improved catalytic performance.Herein,various O‐functional MXenes were investigated as NRR catalysts by a combination of density functional theory calculations and least absolute shrinkage and selection operator(LASSO)regression.Nb_(3)C_(2)O_(X) has been regarded as a promising catalyst for the NRR because of its stability,activity,and selectivity.The poten‐tial‐determining step is*NH_(2) hydrogenation to*NH3 with a limiting potential of-0.45 V.Further‐more,via LASSO regression,the descriptors and equations fitting the relationship between the properties of O‐functional MXenes and NRR activity have been proposed.This work not only pro‐vides a rational design strategy for catalysts but also provides machine learning data for further investigation.

教你挑选钢琴罩

一架新的钢琴进家门后，首先想到的是给它选一个琴罩。一般琴罩大多采用质地柔软的布料加工。布套的设计以既美观又方便练琴为原则，琴行也有售。琴套的质地、款式、颜色要和钢琴及家庭的环境相协调。还可以在钢琴顶上盖一块网眼比较大的装饰布，女孩可以根据钢琴的尺寸和自己喜欢的图案自己设计制作。

Experimental Research of Pressure Distribution in the Casing of Inducer

In this paper the inducer of the advanced-researched pump is studied. During multi-rotation speed experimentwith the medium of water, the dynamic pressures near inducer casing are obtained by transducer at each measuringpoint mounted on the casing along the axial direction, both in the steady rotation speed period and the up anddown period. Bases on analyses, the regularity of the axial distribution of time averaged pressure and pressurepulsation amplitude, the connection between pressure pulsation frequency and rotation speeds, and the relationshipbetween the pressure pulsation amplitude and the site of inducer blade are obtained.

Local effect of celecoxib on peripheral nerve repair com- bined with silicone tubulization in rat

Objective： To assess local effect of celecoxib on nerve regeneration in a rat sciatic nerve transec- tion model. Methods： Forty-five male healthy white Wistar rats were randomly divided into three experimental groups （n= 15 for each）： sham-operation （SHAM）, control （SIL） and celecoxib treated （SIL/CLX） groups. In SHAM group after anesthesia left sciatic nerve was exposed and after homeo- stasis muscle was sutured. In SIL group the left sciatic nerve was exposed in the same way and transected proximal to tibioperoneal bifurcation leaving a 10 mm gap. Proximal and distal stumps were each inserted into a silicone tube and filled with 10 gl phosphate buffered solution. In SIL/CLX group defect was bridged using a silicone tube filled with 10 μl celecoxib （0.1 g/L）. Results： Functional study and gastrocnemius muscle mass confirmed faster and better recovery of regenerated axons in SIL/CLX than in SIL group （P〈0.05）. Morphometric indices of regenerated fibers showed number and diameter of the myelinated fibers in SIL/CLX were significantly greater than those in control group. In immunohistochemistry, lo- cation of reactions to S-100 in SIL/CLX was clearly more positive than that in SIL group. Conclusion： Response to local treatment ofcelecoxib demonstrates that it influences and improves functional re- covery of peripheral nerve regeneration.

Direct dynamical characterization of higher-order topological phases with nested band inversion surfaces

Higher-order topological phases(HOTPs) are systems with topologically protected in-gap boundary states localized at their ed à nT-dimensional boundaries, with d the system dimension and n the order of the topology. This work proposes a dynamics-based characterization of one large class of Z-type HOTPs without specifically relying on any crystalline symmetry considerations. The key element of our innovative approach is to connect quantum quench dynamics with nested configurations of the socalled band inversion surfaces(BISs) of momentum-space Hamiltonians as a sum of operators from the Clifford algebra(a condition that can be partially relaxed), thereby making it possible to dynamically detect each and every order of topology on an equal footing. Given that experiments on synthetic topological matter can directly measure the winding of certain pseudospin texture to determine topological features of BISs, the topological invariants defined through nested BISs are all within reach of ongoing experiments. Further, the necessity of having nested BISs in defining higher-order topology offers a unique perspective to investigate and engineer higher-order topological phase transitions.

Post-J test inference in non-nested linear regression models

This paper considers the post-J test inference in non-nested linear regression models. Post-J test inference means that the inference problem is considered by taking the first stage J test into account. We first propose a post-J test estimator and derive its asymptotic distribution. We then consider the test problem of the unknown parameters, and a Wald statistic based on the post-J test estimator is proposed. A simulation study shows that the proposed Wald statistic works perfectly as well as the two-stage test from the view of the empirical size and power in large-sample cases, and when the sample size is small, it is even better. As a result,the new Wald statistic can be used directly to test the hypotheses on the unknown parameters in non-nested linear regression models.