The advent of conjugated microporous polymers (CMPs) has had significant impact in catalysis. However, the presence of only micropores in these polymers often imposes diffusion limitations, which has resulted in the low utilization of CMPs in catalytic reactions. Herein, the preparation of a foam-supporting CMP composite with interconnective micropores and macropores and elastic properties is reported. Metalloporphyrin-based CMP organogels are synthesized within the melamine foam by a room-temperature oxidative homocoupling reaction of terminal alkynes. Upon drying, the CMP-based xerogels tightly wrap the framework skeletons of the foam, while the foam cells are still open to allow for the preservation of elasticity and macroporosity. Such a hierarchical structure is efficient for acyl transfer, facilitates substrate diffusion within interpenetrative macropores and micropores, and could be used to intensify catalytic processes.

As it was firstly reported in 2007, conjugated microporous polymer (CMP) has been constructed by a diversity of conjugation building blocks towards a three-dimensional rigid organic framework with the form of insoluble and infusible solid powders. Although CMP has showed the collective characteristics such as exceptional porosity, stable network structure and versatile functionality for potential applications and broad prospects in many fields, the problem of processability concerning this kind of material has not been overcome yet. To take full advantage of their features and break through the application scopes from adsorption and separation to energy and environment such as photoelectric transformation, sensing and catalysis, modulation of growth and formation of CMP in multiple scales is highly anticipated, giving rise to the micro/nanometer-size CMP microspheres and macroscopic CMP films, coatings or gels. Unambiguously, such well-organized forms either have the improved solution properties for further processing, or appear membranes directly assembled into devices. Looking back at the progress of CMP studies in recent years, there are four strategies reported to explore multi-scale CMPs, including (1) soluble CMP-like polymer, (2) solution-dispersible CMP microspheres, (3) CMP-based (composite) film, and (4) CMP-supporting organogel. In these studies, the novel polymerization methods, new catalysts or functional monomers were adopted; the resulting CMPs could be processed, assembled or combined with other materials in solution, and have greatly promoted the performances of optical sensing, photoelectric conversion, energy storage and heterogeneous catalysis on intended devices. It is noted that the reported methodologies have some limitation, but upon the creative ideas and vast explorations, CMP is going to be one important branch of porous materials with promising perspectives.

A Pd(II)/Cu(I) cocatalyzed homocoupling reaction of terminal alkynes to diynes was used to synthesize conjugated polymer organogels with tetragonal topological frameworks consisting of Zn-porphyrin units as nodes and diynes as struts. This material appears fibrous with a micrometer length, possesses outstanding elastic properties, and could be organized into desired modules. Upon drying, the transformed xerogels afford superior thermal stability and microporosity, implying that they are supported by conjugated microporous polymer (CMP) skeletons at the molecular level. The microporosity of CMP-structured xerogels could be adjusted by varying the monomer concentrations, reaction temperatures and solvent species. The notable narrowed pore size distribution is achieved under optimal conditions, which results in CMP-supported xerogels outperforming the most reported CMPs, although the networks are still amorphous in nature. By following the same synthesis route, for the first time, the interpenetrating polymer network organogels were prepared by forming two CMP components sequentially in a temperature-controlled manner and in one pot. This provides an unprecedented combination of multiple interwoven CMP modules whose functions could be assembled synergistically for prospective broader applications.

A two-step polymerization combining miniemulsion and solvothermal techniques was applied to synthesize tetraphenylethene-based nanoscale conjugated microporous polymers (TPE-NCMP), which simultaneously possessed a large surface area (1214 m2/g) and a high aggregation-induced florescence quantum yield (58%). Immobilization of Nile Red within micropores of TPE-NCMPs constructed a light-harvesting composite with characteristics of intense photons acquisition and efficient energy migration. Homogenous NCMP-based films were fabricated by blending the dye-doped TPE-NCMPs with PVA. The fluorescence emission could be flexibly tuned by varying the dosage of dyes over the whole visible spectrum including a pure white light.

A two-step polymerization combining mini-emulsion and solvothermal techniques was applied to synthesize tetraphenylethene-based nanoscale conjugated rnicroporous polymers (TPE-NCMP), which simultaneously possessed a large surface area (1214 m(2)/g) and a high aggregation induced florescence quantum yield (58%). Immobilization of Nile Red within micropores of TPE-NCMPs constructed a light harvesting composite with characteristics of intense photons acquisition and efficient energy migration. Homogenous NCMP-based films were fabricated by blending the dye doped TPE-NCMPs with PVA. The fluorescence emission could be flexibly tuned by varying the dosage of dyes over the whole visible spectrum including a pure white light.

A novel continual low pressure die casting technology based on PLC and touch screen was developed due to some disadvantages occurred in the traditional low pressure die casting process, such as low efficiency, poor liquid quality and unstable air pressure. The new equipment is made up of three independent furnaces including holding furnace, pressurizing furnace and up-stream furnace. The three furnaces are connected by the paths located in the bottom of the furnace. Refilling, pressurizing, pouring are fulfilled by the three furnaces, respectively. Pressurizing furnace possesses constant liquid volume and liquid level is kept at the same height before air pressurizing. So the air pressure curve is accurate and stable, and good reproducibility can be achieved for each pouring. Interruption between refilling and pouring through holding furnace can′t observed. Therefore continual production and high efficiency can be guaranteed.

Metalloporphyrin-based CMP nanoparticles synthesized by the oxidative dimerization of terminal alkynes in the toluene-in-water miniemulsion possess native porosity, outstanding solution processability and uniform nanosized distribution. Also, they exhibit the sensitive color-switching ability for quantitative assay of gaseous SO2 by the noncovalent complex-displacement reaction at liquid-solid or gas-solid interfaces.

Folate-conjugated poly(N-(2-hydroxypropyl)methacrylamide-co-methacrylic acid) nanohydrogels were facilely prepared via distillation–precipitation polymerization and subsequent folate modification. Due to the nanohydrogels being crosslinked with disulphide bonds, they could be easily degraded into short polymer chains in the presence of glutathione, which will be beneficial for easily discharging the nanohydrogels from the body. Doxorubicin (DOX), a clinical anti-cancer drug, was efficiently loaded in the nanohydrogels (up to 39.3 wt%) by the electrostatic interactions between the amine group in doxorubicin (DOX) and the carboxyl groups in the nanohydrogels at neutral conditions. The cumulative release profile of the DOX-loaded nanohydrogels showed a relatively low level of drug release (23 wt% in 48 h) at pH 7.4 and a quick release (over 95 wt% in 2 h) at pH 5.0 with reducing environment, exhibiting pH/redox dual-stimuli-responsive drug release. The dose-dependent cytotoxicity of the drug-loaded nanohydrogels was studied by the CCK-8 assay. The nanohydrogels possess many favourable merits of drug carriers, such as excellent biocompatibility, high drug loading capacity, minimal drug release under an extracellular condition, rapid drug release in response to the intracellular level of pH and reducing environment, and folate-mediated endocytosis, which endow them as great candidates for targeted delivery of anti-cancer drugs.

The temperature of thin-fine core pin in die-casting mold is a major difficulty in the die-casting mold temperature control, which has significant effects on internal quality of the casting holes and service life of core pin. In order to solve such problems as the poor quality of small holes of die casting and deformation, soldering and fracture of thin-fine core pin, the control system of core pin cooling based on PLC and touch screen technology has been developed. High pressure cooling water combined with air blowing was used to decrease the temperature of the core pin in the system. The cooling water has the characteristics of independent, closed and circular. The hardware system was designed through the "PLC + touch screen" technology, in which PLC was the host computer, embedded touch screen combined with A/D conversion module as the core of whole system. The software system was composed of PLC control program and configuration system. Production and application results show that core pin temperature exhibits a lower fluctuation and service life is increased greatly after using the system. Meanwhile, casting quality is improved and the reject rate is reduced to below 2%. The advantages of the system include convenience for display, visualized, simple interface and stable and reliable controlling.

Well-defined amphiphilic diblock copolymers of poly(N-(2-hydroxypropyl)methacrylamide)-block-poly(benzyl methacrylate) (PHPMA-b-PBnMA) are synthesized using reversible additionfragmentation chain transfer polymerization. The terminal dithiobenzoate groups are converted into carboxylic acids. The copolymers self-assemble into micelles with a PBnMA core and PHPMA shell. Their mean size is <30 nm, and can be regulated by the length of the hydrophilic chain. The compatibility between the hydrophobic segment and the drug doxorubicin (DOX) affords more interaction of the cores with DOX. Fluorescence spectra are used to determine the critical micelle concentration of the folate-conjugated amphiphilic block copolymer. Dynamic light scattering measurements reveal the stability of the micelles with or without DOX. Drug release experiments show that the DOX-loaded micelles are stable under simulated circulation conditions and the DOX can be quickly released under acidic endosome pH.

Safety assurance and detection of potential damage for space truss structures have been challenging topics. The two most critical problems are considered in this paper. One is to develop an effective damage detection method based on strain data under ambient excitation, and the other is then to optimize the installment of strain sensors owing to numerous structural members in the space truss structures. A method of damage detection for space truss structures, called the environmental excitation incomplete strain mode (EEISM) method, is proposed. Four steps are taken in the EEISM method. First, strain mode parameter identification is carried out based on the cross-correlation function of the strain responses through a combination of the empirical mode decomposition method and the peak amplitude series method. Second, the strain sensors are located optimally in the space truss structures through sensitive analysis of the strain mode perturbation matrix, which are obtained by perturbation theory. Third, the modal assurance criterion (MAC) value is applied to locate the damages; that is, the members with the larger MAC values are defined as the damaged members. Finally, a damage index obtained by solving the perturbation equation is used for damage quantification. Numerical analysis of a long-span space truss structure including damage location and quantification for single-member and multimember damages, detection of the various severities of damage, and the effect of the number of sensors is performed to verify the effectiveness of the proposed EEISM method. It is shown from the analysis results that the EEISM method is effective in the location and quantification of damages for single-member and multimember damages. The quantity of the strain sensors has an effect on the damage location and has no remarkable effect on the damage quantification for the determined damage members.

A smart magnetic targeting drug carrier (MCNC/PAA) comprising an approximately 100 nm sized magnetic colloid nanocrystal cluster (MCNC) core and a pH-responsive cross-linked poly(acrylic acid) (PAA) shell is reported. The abundant carboxyl groups in the shell enable the resultant MCNC/PAA to easily load a large amount of doxorubicin (DOX) (up to 44.6%) via the strong interaction between the DOX and the carboxyl group in a neutral solution. Interestingly, a synergistic pH-responsive effect derived from the entrapped DOX and PAA network was found to effectively manipulate the drug releasing behavior at 37 °C. It was found that the premature release was highly restricted at a pH of 7.4, and upon reduction in pH from 7.4 to 5.0 or 4.0, a large amount of drug was rapidly released. Compared with the synthesized MCNC/PNIPAM, MCNC/PHEMA and MCNC/PDMAPMA nanocarriers, the MCNC/PAA was preferably suited to drug delivery. In addition, the composite nanocarriers could be tracked by magnetic resonance imaging (MRI). The cytotoxicity assay of MCNC/PAA to normal cells indicated that the composite nanospheres were biocompatible and suitable as drug carriers. Meanwhile, the DOX-loaded composite nanospheres had more potent cytotoxicity than free DOX to HeLa cells. These results clearly imply that the MCNC/PAA nanocarrier is a promising platform that can be applied to construct a smart drug delivery system with magnetic targeting and pH-stimulation, as well as tracking by MRI.

Damage detection based on strain responses of vibration is highly attractive for monitoring long-span reticulated structures. However, there are a lot of structure members in reticulated structures and it is impossible to install strain sensors in each member. Therefore, how to locate and quantify damages with the incomplete mode shapes obtained from few strain sensors is a challenge topic. A new strategy, named incomplete strain mode damage detection (ISMDD) strategy, is proposed in this paper. In the strategy, the distribution of the strain sensors in the reticulated structures can be optimized through sensitive analysis on strain mode perturbation matrix, which can be obtained by perturbation theory. Mode assurance criterion (MAC) value is applied in damage location, and the members with relative large MAC values are defined as damage members. In addition, damage index obtained by solving the perturbation equation is used for damage quantification. Numerical analysis on a long-span reticulated structure, including damage location and quantification for single- and multi-member damages, detection for different damage quantity, the effect analysis of sensor quantity, are performed to verify the effectiveness of the proposed ISMDD strategy. It can be shown from the analysis that the ISMDD strategy is effective in damage location and quantification for both single- and multi-member damages. And the quantity of strain sensors has effect on damage location, but has no obvious influence on damage quantification. Additionally, the anti-noise pollution ability analysis of the ISMDD strategy is carried out, which shows that the ISMDD strategy has excellent anti-noise pollution ability for both single- and multi-damaged members.

Simulation for stochastic wind field is very important in analyzing dynamic responses of large complex structures due to strong wind. The typical simulation method is the spectrum representation method (SRM), but the SRM has drawbacks of inferior precision in lower frequency and slow calculating speed. In view of this, the modified Fourier spectrum method (MFSM) is introduced into the simulation of stochastic wind field in this paper. In this method, phase information of wind velocity time history is determined by cross power spectral density (CPSD) between adjacent points, and the wind velocity time history with time and space correlation is generated by iterative modification for CPSD considering auto power spectral density (APSD). Simulation of the wind field for a long-span bridge is undertaken to verify the effectiveness of the MFSM. Simulation results of the SRM and the MFSM are compared. It can be concluded that the MFSM is more accurate and has higher calculation speed than the SRM.

The viscoelastic multi-dimensional earthquake isolation and mitigation device is a new kind of passive control device, which has both earthquake isolation and earthquake mitigation abilities. In order to quantify the horizontal earthquake isolation and mitigation effect of this device on structures, shaking table tests on structures with and without the devices and the corresponding analysis on earthquake isolation and mitigation properties are carried out. It can be shown from the experimental and analytical results that the device has both earthquake isolation and earthquake mitigation effects on structures in horizontal direction, and its horizontal earthquake mitigation coefficients can be referred to those of the rubber bearing earthquake isolation structure.

The viscoelastic multi-dimensional earthquake isolation and mitigation device is a new kind of passive control device, which can perform its “name-giving” task of earthquake isolation and earthquake mitigation simultaneously. In order to quantify its vertical earthquake isolation and mitigation effect on structures, firstly, shaking table tests on steel frame structures with and without the devices were carried out; secondly, analysis on dynamic characteristics and dynamic responses of the structures was also performed; furthermore, the finite element analytical results and the experimental results were compared. It can be shown from the analytical and experimental results that the devices have noticeable earthquake isolation and mitigation effect in the vertical direction.

Reticulated structures are often applied in large scaled public facility, whose failure will lead to heavy losses. Identification of damage zone will facilitate significantly damage diagnosis. The concept of spectrum energy of frequency response function was proposed in this paper based on spectrum energy of acceleration response. Spectrum energy of acceleration response under white noise excitation can be reconstructed with frequency response function, thus nodes spectrum energy of frequency response function can be obtained. Geometrical characteristic index for energy distribution surface was defined; whose value can indicate, to some extent, damage degree. The proposed method does not require natural frequencies and mode shapes as input parameters. Numerical analysis of a reticulated structure demonstrated the feasibility of the method proposed. 'Symmetry effect' was observed in damage detection.

多维粘弹性隔减震装置是一种新发明的被动控制装置,具有隔震和减震性能.为掌握该装置在水平地震作用下对结构的隔减震效果,本文对加与未加装置的钢框架结构进行了水平向振动台对比试验,并对其隔减震性能进行了研究.试验和理论研究结果表明:该装置在水平方向上对结构具有隔震和减震的双重效果,是一种有效的隔减震装置;这种新型隔减震结构的水平向减震系数可以参照隔震结构的水平向减震系数的计算方法计算.