回压

In this paper, finite-time thermodynamics is applied to optimize the intercooling pressure ratio and the heat conductance distribution of hot- and cold-side heat exchangers, intercooler and regenerator of a real closed intercooled regenerated Brayton cycle. Double-maximum efficiency is obtained by further optimizing the total pressure ratio. The effects of some important parameters on the optimal results are analyzed by detailed numerical examples.

该文应用有限时间热力学方法研究了实际闭式燃气轮机循环热效率最大时高低温侧换热器、回热器和中冷器的热导率最佳分配和最佳中间压比分配；进一步对总压比优化可得到双重最大效率；分析了循环的一些重要参数对性能的影响。

How to ensure this new structure to be in elastic state under frequent earthqu ake, be mendable under design earthquake and not collapse under infrequent earthquake, especially the last item, is the problem to be solved imminently in engineering field. Center around this problem, 5 aspects of investigation are carried out as following:(1) The experiment of seismic performance of ASCCs in this new frame structure has not been reported, in order to study this problem, 9 ASCC specimens with shear steel plate are tested subjected to the horizontal low cyclic loading, in which, the shear span ratio is 3 and axial compression ratio is different. The hysteretic curves of 9 specimens are obtained. The seismic performance indexes such as energy dissipation, stiffness degradation, strength degradation, skeleton curves and ductility of this kind of column are acquired, and the seismic fortification measures including ultimate values of axial compression ratio under different seismic degree are suggested.

1新型框架结构中所采用的角钢混凝土柱抗震性能的试验研究尚未见报道，针对这一问题，本文进行了9根剪跨比为3、不同轴压比、采用钢板箍的角钢混凝土柱在水平低周反复荷载作用下的试验研究，获得了9根试验柱的滞回曲线，考察了该类柱的耗能、刚度退化、抗力衰减、骨架曲线及延性等抗震性能指标，建议了角钢混凝土柱在不同抗震等级下的轴压比限值等抗震构造措施。

In this paper, two assemblies of special test equipments have been designed and fabricated by authors in our laboratory: namely Catalyst Molding Process Analyzer and Catalyst Mechanical Process Tester. These new skills are developed for the dynamic studies on whole mold forming process and crushing process of Fe-Cr WGHS catalyst pellet. Based on the orthogonal experimental design, the effects of some factors during the forming process of solid catalyst, such as predensification proportion, calcination time, calcination temperature and content of graphite on the mechanical strength of catalyst pellets are systematically examined, and the molding conditions have been optimized. Based on the experimental data, the relationship between catalyst density and forming pressure are educed, and the physical significances of some related parameters are described. The parameter of macro scopic elastic moduls has been suggested to character the mechanical properties of molding catalyst. The effects of molding pressure on mechanical properties of catalyst pellets are discussed, and results show that there exists a optimal molding pressure for the ideal mechanical properties: when over-high or over-low pressure is applied, the specific surface area and side crushing strength of catalyst pellets will decreased. The "rebound effect" will be undermined by the unsuitable pressure maintain process, resulting in the apparent decrease of mechanical strength of catalyst pellets.

本研究通过自行设计制造的催化剂模压成型过程分析仪（Catalyst Molding Process Analyzer， CMPA）和催化剂力学性质测试仪（Catalyst Mechanical Properties Tester， CMPT），以Fe-Cr系高温变换催化剂片剂为研究对象，对成型过程和受压破碎过程提供了全过程动态研究的新手段；本研究利用正交实验设计方法考察了固体催化剂成型过程中诸因素（包含预密致比例、煅烧时间、煅烧温度和石墨含量等）对催化剂成型体强度的影响，并对成型条件进行了优化；根据实验结果，关联确定了固体催化剂成型过程中的密度－压力关系式，并对方程中诸因子的物理意义进行了描述；提出了一种利用宏观弹性模量来表征成型催化剂的力学性质的方法；研究讨论了成型压力对催化剂成型体强度性质的影响，结果表明：对于催化剂成型体的强度和比表面性质，成型压力存在着一个最佳值，过高的成型压力会导致比表面积和侧压强度的降低；不适当的成型压力的维持时间会破坏&压力回弹&作用，造成催化剂成型体的机械强度明显降低。

The paper based on experiment of two Subassemblage and Prestressed concrete frames under low reversed cyclic loading, crack distribution, failure pattern, hysteresis curve, skeleton curve, displacement ductility, energy dissipation and rigidity degeneration are studied systematically.

本文通过对两榀预压装配式预应力混凝土框架在低周反复荷载作用下的试验，深入研究了预压装配式预应力混凝土框架的裂缝分布、破坏形态、滞回曲线、骨架曲线、位移延性、耗能能力、刚度退化等抗震性能。

In order to unsterdand the properties of rebound and recompression, this study carried out oedometer tests for six soft clays with three surcharge ratios to simulate surcharging. Properties analyzed in this thesis include: 1 post–surcharge secant secondary compression index; 2 amended post- surcharge secant secondary compression index in which the time starts from load application; 3 time at which secondary compression reappears; 4 post-surcharge secondary compression strain rate.

为探讨软弱粘土於超载移除后的回胀与再压缩性质，本研究利用传统单向度压密试验仪对六种土样分别进行三种超载比的超载单向度压密试验，并分析所得结果，分析方法包括：1评估后超载割线二次压缩指数；2评估修正后超载割线二次压缩指数，将后超载的时间原点改为由加载起始时起算；3评估二次压缩再现时间与超载比的关系；4评估后超载二次压缩应变速率之特性。

Our company specializes in the creation of the valve handwheel, handle, bevel gear, worm gear boxes, valve stem, nuts and various valve accessories enterprise can also be in accordance with customer requirements, order a variety of different specifications of hexagonal, square heart, round hole Size of hand wheel of the Company since its inception has been committed to product innovation, and constantly develop new products, our customer-centered and quality as its core business philosophy, in order for the company's products to better serve the society serve the public, the company's strict production management system, continuous introduction of new technologies, new materials, new techniques, and is equipped with a set of complete machining equipment and sophisticated testing equipment to create the link axis hand wheel, hand wheel Fang, keyway hand round, hexagonal hand wheel, lever ball valve, butterfly valve handle, valve bevel gear, worm gear box, is the Quartet SL101-F type, cone Quartet SL101-Z type, is the Quartet SL104-F type, flower type is SL105 Quartet , cone Quartet SL-104-Z-type, hexagonal SL104-L-type, hexagonal SL101-L type, round type keyway SL101, SL104 keyway circular type, is the six-party type SL102, SL101-J-type keyway, keyway SL102-J-type , SL103-J-type keyway, keyway SB101-J-type, the second generation of new hand wheel, BA series bevel gear, WQDX3, QDX3, QDS3-S, QDX3-G, XQDX3, QDX3-CF, FQDX3, SQDX3 part series back to transformation of the valve device manually, QDX3-C, QDX3-D series valve electric part of the transition back to devices, valve cover series, bearing gland series, the electric-type bearing cap, with a round open cap, sealing the Block series, hand - hard hat round shields hexagonal locking nut series of the Company follow the "survive on quality, reputation and development" business philosophy and the integrity, service, communicate, progress, development.

本公司自创建以来，就一直致力于产品的技术创新，不断开发新产品，秉承以客户为中心，以质量为核心的经营理念，为使公司的产品能更好的服务于社会、服务于大众，公司实行严格的生产管理制度，不断采用新技术，新材料，新工艺，并配有一整套完善的机械加工设备和检测设备制造出精良的连轴手轮，方心手轮，键槽手轮，六角手轮，球阀手柄，蝶阀手柄，阀门伞齿轮，蜗轮箱，正四方SL101-F型，锥四方SL101-Z型，正四方SL104-F型，正四方SL105花型，锥四方SL-104-Z型，六角SL104-L型，六角SL101-L型，圆型键槽SL101型，圆型键槽SL104型，正六方SL102型，键槽SL101-J型，键槽SL102-J型，键槽SL103-J型，键槽SB101-J型，第二代新型手轮，BA系列伞齿轮，WQDX3，QDX3，QDS3-S，QDX3-G，XQDX3，QDX3-CF ，FQDX3，SQDX3系列部份回转型阀门手动装置，QDX3-C，QDX3-D系列部份回转型阀门电动装置，阀瓣盖系列，轴承压盖系列，电动型轴承压盖，圆开帽，上密封座系列，手轮护罩拼帽系列六角锁紧螺母系列本公司遵循&以质量求生存，以信誉求发展&的经营理念和诚信，服务，交流，进步，开拓。

Both monotonic axial compressive and axially loaded cyclic tests have been carried out on the steel box brace used in New CCTV Building to investigate the effect of assembling welds including full penetration and partial penetration on the structural behavior of the brace.

为考察全熔透和部分熔透两种组装焊缝形式对箱形截面钢支撑受力性能的影响，本文对中央电视台新台址建设工程中的箱形截面支撑进行了单调受压、轴向反复拉压试验；同时，采用ABAQUS有限元软件实现了对部分熔透试件未熔透处的接触模拟和滞回性能模拟。

The valve packing Manufacturer or to the FORGED STEEL VALVES packing company's technical department or consult the relevant provisions of torque compression percentage, the following steps to tighten the squeeze cap nut:(1) applied to the gland nut torque to full torque of 30% or the percentage compression of the party;(2) repeatedly open and close valves several times, when the valve is in the closed position, to exert all the torque;(3) Repeat steps (2) 3 or 4 times.

阀门用盘根向盘根制造商或企业的技术部门止回阀咨询有关扭矩的规定或压缩百分比，按以下步骤拧紧压盖螺母：（1）向压盖螺母施加扭矩至满扭矩的30%或是党的压缩百分比；（2）反复开闭阀门数次，当阀门处于蝶阀关闭位置时，施加全部扭矩；（3）重复步骤（2）3或4次。

Our company produce all kinds of high, medium and pressure series valve, valve, check valve, valve plate, high pressure oil wellhead equipment, slurry pipe sinks, cutting Meeting Series snubbing pipe, casing head and drilling accessories such as petroleum, chemical industry equipment.

公司主要生产经营各类高、中、压系列闸阀、截止阀、止回阀、平板阀门、高压采油井口装置，泥浆管汇、节流压井管汇系列、套管头及钻采配件等石油、化工行业专用设备。

HVAC piping design with valve selection 1, chiller plant, cooling water between inlet valve design; 2, before the butterfly pumps, filters, pumps after the check valve, butterfly valve; 3, sets, water separator pressure differential between the bypass valve; 4, set, divider into the returning pipe valve 5, the level of dry pipe valve; 6, valve air handling units, filters, electric two-pass or three-way valve 7, fan coil valve (or plus electric two-way valve) Note: The valve is typically used when the diameter is less than 150mm used Handle Butterfly Valve (D71X, D41X); diameter greater than 150mm used worm drive butterfly (D371X, D341X).

暖通空调管道用阀门的选型设计 1、冷冻水机组、冷却水进出口设计蝶阀； 2、水泵前蝶阀、过滤器，闸门水泵后止回阀、蝶阀； 3、集、分水器之间压差旁通阀； 4、集、分水器进、回水管蝶阀 5、水平干管蝶阀； 6、空气处理机组闸阀、过滤器、电动二通或三通阀 7、风机盘管闸阀注：一般采用蝶阀时，口径小于150mm时采用手柄式蝶阀（D71X、D41X）；口径大于150mm时采用蜗轮传动式蝶阀（D371X、D341X）。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。