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Primary spinal epidural non-Hodgkin’s lymphoma presented with spinal cord compression syndrome

Chunquan CAI MD, PhD, Qingjiang ZHANG BM, Changhong SHEN MD, PhD,

《医学前沿（英文）》 2009年第3卷第4期页码 499-502 doi: 10.1007/s11684-009-0075-9

摘要： The spinal epidural space is an uncommon presenting site in primary non-Hodgkin’s lymphomas, especially for children. A boy suffered spinal cord compression syndrome caused by primary spinal epidural non-Hodgkin’s lymphoma. Thoracolumbar magnetic resonance imaging (MRI) demonstrated an intraspinal mass. An operation was performed with gross total tumor removal. Histological examination revealed a non-Hodgkin’s B-cell lymphoma. Bone marrow aspiration was negative for lymphoma involvement. No other therapies (chemotherapy and/or radiotherapy) were performed according to the parents’ opinion. The patient died approximately one year after the operation due to brain metastases. The clinical course and imaging features were discussed with a review of literatures.

关键词： non-Hodgkin’ s lymphoma primary spinal cord compression syndrome epidural space

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Cream coated on endotracheal tube with or without epidural lidocaine reduces isoflurane requirement during

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《医学前沿（英文）》 2012年第6卷第3期页码 302-306 doi: 10.1007/s11684-012-0194-6

摘要：

This study was designed to evaluate the effect of tracheal topical anesthesia using EMLA^? Cream (EC) coated on the endotracheal tube (ETT) with or without epidural anesthesia (EA) on isoflurane requirement during general anesthesia (GA) and investigate whether EC coated on the ETT with EA was associated with the additive effect compared with the effect when each anesthetic was administered independently. The prospective randomized, double-blinded, and controlled study included 60 ASA I–II patients scheduled for upper abdominal surgery requiring GA. Patients were randomly assigned to one of the following groups: group 1 received GA, group 2 received EC+ GA, group 3 received GA+ EA, and group 4 received EC+ GA+ EA. Isoflurane was administered at the required concentrations to maintain the mean arterial pressure at a level not exceeding 20% of preoperative values. The percentage mean expired concentration (%MEC) was used in calculating the isoflurane requirement. Emergence agitation, postoperative sore throat, and hoarseness were recorded. Groups 2, 3, and 4 exhibited a significant reduction on isoflurane requirement compared with group 1 (P<0.05). The isoflurane requirement evaluated by %MEC decreased by 12%, 38%, and 50% in groups 2, 3, and 4, respectively. The incidence of emergence agitation was significantly lower in groups 2 and 4 than those in groups 1 and 3 (P<0.05). Tracheal topical anesthesia using EC coated on ETT with or without EA reduced the isoflurane requirement during GA, indicating that EC combined with EA exhibited an additive effect on the requirement of general anesthetic.

关键词： EMLA? Cream epidural anesthesia general anesthesia isoflurane lidocaine

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The “Tiangong” Chinese Space Station project

Yang HONG

《工程管理前沿（英文）》 2018年第5卷第2期页码 278-283 doi: 10.15302/J-FEM-2018202

关键词： manned space station space station project basic design

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Application and development of modern long-span space structures in China

Shilin DONG, Yang ZHAO, Dong XING

《结构与土木工程前沿（英文）》 2012年第6卷第3期页码 224-239 doi: 10.1007/s11709-012-0166-6

摘要： Modern long-span space structures, developed during the 1970s and 1980s, are light and effective structures based on new technologies and light-weight high-strength materials, such as membranes and steel cables. These structures include air-supported membrane structures, cable-membrane structures, cable truss structures, beam string structures, suspen-domes, cable domes, composite structures of cable dome and single-layer lattice shell, Tensairity structures and so forth. For the premodern space structures widely used since the mid-twentieth century (such as thin shells, space trusses, lattice shells and ordinary cable structures), new space structures have been developed by the combination of different structural forms and materials. The application of prestressing technology and the innovation of structural concepts and configurations are also associated with modern space structures, including composite space trusses, open-web grid structures, polyhedron space frame structures, partial double-layer lattice shells, cable-stayed grid structures, tree-type structures, prestressed segmental steel structures and so forth. This paper provides a review of the structural characteristics and practical applications in China of modern rigid space structures, modern flexible space structures and modern rigid-flexible combined space structures.

关键词： modern long-span space structures rigid space structures flexible space structures rigid-flexible combined space structures application and development

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统筹空间科学、空间技术、空间应用协调发展的思考

周建平,吴季

《中国工程科学》 2023年第25卷第2期页码 59-66 doi: 10.15302/J-SSCAE-2023.02.007

摘要：

我国航天事业因历史原因和投入限制，在初期以空间技术、空间应用为主，对空间科学重视不足，空间科学、空间技术、空间应用基本上是独立发展的；着眼新时期航天强国建设，需要将空间技术的发展深度融合到空间科学、空间应用中去，从而创造新的机遇和成就。本文剖析了空间科学、空间技术、空间应用的基本内涵并明确三者的相互关系，在系统分析国际空间科学、空间技术、空间应用的整体态势，细致梳理我国相关领域发展情况的基础上，论证了统筹我国空间科学、空间技术、空间应用协调发展的必要性，凝练了三者协调发展面临的主要问题。空间科学、空间技术、空间应用之间既有需求交叉，又可互促带动，应在规划、部署、实施的全过程中进行统筹考虑：发挥新型举国体制优势，在统一管理下做好顶层规划；坚持创新驱动发展战略，以技术进步抢占国际航天制高点；支持空间领域基础研究，培育高水平的科学家和工程师队伍；加强资源统筹协调，促进空间应用数据的合理开放和充分利用。

关键词：航天事业；空间科学；空间技术；空间应用；协调发展；数据开放共享

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空间物理和空间天气探测与研究

王赤

《中国工程科学》 2008年第10卷第6期页码 41-45

摘要：

空间物理学是1957年人造卫星发射成功后迅速发展起来的一门交叉学科。近50年来，空间已成为人类生存的第四环境，其重要性日益突出。20世纪90年代初，空间物理学与空间应用的密切结合产生了专门研究和预报空间环境中灾害性过程及其变化规律，减轻或防止空间灾害并为人类活动服务的空间天气学。文章简要总结了国外及国内空间物理和空间天气探测的历程和发展趋势，并提出对我国未来空间物理和空间天气探测发展规划和探测路线图的几点建议。

关键词：空间物理空间天气空间物理探测发展规划

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深空安全研究现状与未来发展

吴克,张哲,杨文飞,何建峰,张天柱,简抗抗,吴伟仁

《中国工程科学》 2022年第24卷第4期页码 240-248 doi: 10.15302/J-SSCAE-2022.04.023

摘要： Managing space radiation risk in the new era of space exploration [R].Managing space radiation risk in the new era of space exploration [R].Human space exploration the next fifty years [J].Human space exploration the next fifty years [J].Human space exploration the next fifty years [J].

关键词：深空安全空间辐射威胁行星保护太空遗产保护空间立法

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Fabrication of bimetallic Cu–Zn adsorbents with high dispersion by using confined space for gas adsorptive

《化学科学与工程前沿（英文）》页码 1623-1631 doi: 10.1007/s11705-022-2202-y

摘要： The number of active components and their dispersion degree are two key factors affecting the performance of adsorbents. Here, we report a simple but efficient strategy for dispersing active components by using a confined space, which is formed by mesoporous silica walls and templates in the as-prepared SBA-15 (AS). Such a confined space does not exist in the conventional support, calcined SBA-15, which does not contain a template. The Cu and Zn precursors were introduced to the confined space in the AS and were converted to CuO and ZnO during calcination, during which the template was also removed. The results show that up to 5 mmol·g^–1 of CuO and ZnO can be well dispersed; however, severe aggregation of both oxides takes place in the sample derived from the calcined SBA-15 with the same loading. Confined space in the AS and the strong interactions caused by the abundant hydroxyl groups are responsible for the dispersion of CuO and ZnO. The bimetallic materials were employed for the adsorptive separation of propene and propane. The samples prepared from the as-prepared SBA-15 showed superior performance to their counterparts from the calcined SBA-15 in terms of both adsorption capacity of propene and selectivity for propene/propane.

关键词： bimetallic adsorbents confined space mesoporous silica propene/propane separation

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Corrosion damage assessment and monitoring of large steel space structures

Bo CHEN, You-Lin XU, Weilian QU,

《结构与土木工程前沿（英文）》 2010年第4卷第3期页码 354-369 doi: 10.1007/s11709-010-0088-0

摘要： Large steel space structures, when exposed to a harsh corrosive environment, are inevitably subjected to atmospheric corrosion and stress corrosion cracking. This paper proposes a framework for assessing the corrosion damage of large steel space structures subjected to both stress corrosion cracking and atmospheric corrosion. The empirical model for estimating atmospheric corrosion based on measured information is briefly introduced. The proposed framework is applied to a real large steel space structure built in the southern coastal area in China to assess its corrosion damage and investigate the effects of atmospheric corrosion on stress corrosion cracking. Based on the results, the conceptual design of the corrosion monitoring system of large steel space structures is finally conducted as the first step for a real corrosion monitoring system.

关键词： large steel space structure atmospheric corrosion stress corrosion cracking corrosion damage damage assessment monitoring system

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我国航天的成就与发展

王礼恒

《中国工程科学》 2008年第10卷第12期页码 10-12

摘要：

概述了国际航天发展的现状，对国际航天发展的新趋向“新世纪航天新计划”及其特点进行了概括，同时客观地总结了我国航天事业发展所取得的辉煌成就，在此基础上充分地展望了我国航天事业未来的发展愿景。

关键词：中国航天航天新计划中国航天成就

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Effect of heat transfer space non-uniformity of combustion chamber components on in-cylinder heat transfer

Jizu LV, Minli BAI, Long ZHOU, Jian ZHOU,

《能源前沿（英文）》 2010年第4卷第3期页码 392-401 doi: 10.1007/s11708-009-0066-1

摘要： Combustion chamber components (cylinder head-cylinder liner-piston assembly-oil film) were treated as a coupled body. Based on the three-dimensional numerical simulation of the heat transfer of the coupled body, a coupled three-dimensional calculation model for the in-cylinder working process and the combustion chamber components was built with domain decomposition and boundary coupling method, which adopts the coupled three-dimensional simulation of in-cylinder working process and the combustion chamber components. The model was applied in the investigation of the influence of space non-uniformity in heat transfer among combustion chamber components on in-cylinder heat transfer. The results show that the effect of wall temperature space non-uniform distribution of combustion chamber components on heat transfer happens mainly at the end of the compression stroke and expansion stroke. Therefore, it can be concluded that wall temperature space non-uniform distribution of combustion chamber components would influence heat transfer during the intake and exhaust stroke obviously.

关键词： heat transfer space non-uniformity soot emission in-cylinder diesel

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Out-of-plane elastic buckling load and strength design of space truss arch with a rectangular section

Senping WANG; Xiaolong LIU; Bo YUAN; Minjie SHI; Yanhui WEI

《结构与土木工程前沿（英文）》 2022年第16卷第9期页码 1141-1152 doi: 10.1007/s11709-022-0866-5

摘要： The out-of-plane stability of the two-hinged space truss circular arch with a rectangular section is theoretically and numerically investigated in this paper. Firstly, the flexural stiffness and torsional stiffness of space truss arches are deduced. The calculation formula of out-of-plane elastic buckling loads of the space truss arch is derived based on the classical solution of out-of-plane flexural-torsional buckling loads of the solid web arch. However, since the classical solution cannot be used for the calculation of the arch with a small rise-span ratio, the formula for out-of-plane elastic buckling loads of space truss arches subjected to end bending moments is modified. Numerical research of the out-of-plane stability of space truss arches under different load cases shows that the theoretical formula proposed in this paper has good accuracy. Secondly, the design formulas to predict the out-of-plane elastoplastic stability strength of space truss arches subjected to the end bending moment and radial uniform load are presented through introducing a normalized slenderness ratio. By assuming that all components of space truss circular arches bear only axial force, the design formulas to prevent the local buckling of chord and transverse tubes are deduced. Finally, the bearing capacity design equations of space truss arches are proposed under vertical uniform load.

关键词： torsional stiffness strength design elastic buckling space truss arches out-of-plane

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Application of MoS in the space environment: a review

《机械工程前沿（英文）》 2023年第18卷第3期 doi: 10.1007/s11465-023-0755-1

摘要： A considerable portion of space mechanism failures are related to space tribological problems. Cold welding in high vacuum; surface erosion and collision damage caused by various radiations, high temperature oxidation under atomic oxygen (AO) bombardment; and thermal stress caused by temperature alternation all alter the physical, chemical, and friction properties of materials. In particular, the space vibration caused by alternating temperatures and microgravity environments can alter the motion of the contact body, further affecting its friction properties. Improving the friction properties of contact surfaces in the space environment is an important way to extend the service life of spacecraft. Traditional lubricants can no longer meet the lubrication requirements of the space environment. This study describes the characteristics of the space environment and the applications of solid lubricants. The friction properties of MoS₂, a solid lubricant widely used in space, are discussed. The synergistic lubrication of MoS₂ with surface textures or metals is presented. Advances in research on the friction properties of collision sliding contacts in the space environment are reviewed. The combination of MoS₂ and soft metals with surface textures is introduced to reduce the effects of vibration environments on the friction properties of moving parts in space mechanisms. Finally, the challenges and future research interests of MoS₂ films in space tribology are presented.

关键词： MoS₂ soft metal space environment surface texture synergistic effect vibration

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FULL TIME-SPACE GOVERNANCE STRATEGY AND TECHNOLOGY FOR CROPLAND NON-POINT POLLUTION CONTROL IN CHINA

《农业科学与工程前沿（英文）》 2023年第10卷第4期页码 593-606 doi: 10.15302/J-FASE-2023522

摘要：

Ensuring food safety while reducing agricultural non-point source pollution is quite challenging, especially in developing and underdeveloped countries. Effective systematic strategies and comprehensive technologies need to be developed for agricultural non-point source pollution control at the watershed scale to improve surface water quality. In this review, a proposal is made for a full time-space governance strategy that prioritizes source management followed by endpoint water pollution control. The 4R chain technology system is specifically reviewed, including source reduction, process retention, nutrient reuse and water restoration. The 4R chain technology system with the full time-space governance strategy was applied at the scale of an administrative village and proved to be a feasible solution for reducing agricultural non-point source pollution in China. In the future, a monitoring system needs to be established to trace N and P transport. Additionally, new smart fertilizer and intelligent equipment need to be developed, and relevant governance standards and supportive policies need to be set to enhance the efficacy of agricultural non-point source pollution control.

关键词： 4R chain technology system agricultural non-point source pollution case study full time-space governance strategy

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Development and utilization of underground space for the protection of relics in the Yang Emperor Mausoleum

CHEN Zhilong, ZHANG Ping, LI Juxi

《结构与土木工程前沿（英文）》 2007年第1卷第2期页码 229-233 doi: 10.1007/s11709-007-0028-9

摘要： By analyzing the ten burials that have been unearthed at the Yang Emperor Mausoleum of the Han Dynasty, and China s first wholly underground protection and exhibition hall of relics that is under construction, the article expounds the importance of relic site protection through underground space. In particular, it discusses the preservation of historical and cultural relics, the harmonious relationship between architecture and nature, and the collection and security of cultural relics.

关键词： importance architecture preservation harmonious relationship construction