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Controlling flexibility of metal–organic frameworks

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National Science Review 2018年第6期5卷 907-919页

作者： Jie-Peng Zhang hao-long Zhou Dong-Dong Zhou Pei-Qin Liao Xiao-Ming Chen MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistrySun Yat-Sen University Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou University

Framework flexibility is one of the most important characteristics of metal–organic frameworks(MOFs),which is not only interesting, but also useful for a variety of applications. Designing, tailoring or controlling framework flexibility of MOFs is much more difficult than for static structural features such as the framework topology and pore size/shape. Nevertheless, with in-depth understanding of the relationship between framework flexibility and the host framework structure, guest loading and other aspects such as the crystal size/morphology and external physical environment, some strategies have been developed for controlling the flexibility of MOFs and the corresponding properties, which are summarized and discussed in this review.

关键词： porous coordination polymers metal–organic frameworks flexibility dynamism adsorption structural transformation

Development and Evaluation of a 7-DOF Haptic Interface

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IEEE/CAA Journal of Automatica Sinica 2018年第1期5卷 261-269页

作者： Jian-long hao Xiao-Liang Xie Gui-Bin Bian Zeng-Guang Hou Xiao-Hu Zhou Key Laboratory of Management and Control for Complex Systems Institute of Automation University of Chinese Academy of Sciences Beijing 100190 China IEEE

With the development of human robot interaction technologies, haptic interfaces are widely used for 3 D applications to provide the sense of touch. These interfaces have been utilized in medical simulation, virtual assembly and remote manipulation tasks. However, haptic interface design and control are still critical problems to reproduce the highly sensitive touch sense of humans. This paper presents the development and evaluation of a7-DOF(degree of freedom) haptic interface based on the modified delta mechanism. Firstly, both kinematics and dynamics of the modified mechanism are analyzed and presented. A novel gravity compensation algorithm based on the physical model is proposed and validated in simulation. A haptic controller is proposed based on the forward kinematics and the gravity compensation algorithm. To evaluate the control performance of the haptic interface, a prototype has been implemented. Three kinds of experiments: gravity compensation, static response and force tracking are performed respectively. The experimental results show that the mean error of the gravity compensation is less than 0.7 N and the maximum continuous force along the axis can be up to 6 N. This demonstrates the good performance of the proposed haptic interface.

关键词： Dynamic modeling evaluation haptic interface impedance control

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航行控制算法的智能评估架构设计

舰船科学技术 2024年第2期46卷 170-173页

作者：陈鹏徐言民关宏旭李龙浩刘佳仑武汉理工大学航运学院湖北武汉430063 南方海洋科学与工程广东省实验室(珠海) 广东珠海519082 武汉理工大学内河航运技术湖北省重点实验室湖北武汉430063 武汉理工大学创业学院湖北武汉430070 武汉理工大学智能交通系统研究中心湖北武汉430063 武汉理工大学国家水运安全工程技术研究中心湖北武汉430070

控制算法测试验证评估是确保智能船舶航行性能可靠性和安全性的关键。本文梳理了国内外智能评估技术的发展现状,以Transas船舶航行模拟器为船舶智能航行虚拟测试平台,进行航行控制算法测试评估。根据船舶直线段和弯曲段航行特征建立评... 详细信息

控制算法测试验证评估是确保智能船舶航行性能可靠性和安全性的关键。本文梳理了国内外智能评估技术的发展现状,以Transas船舶航行模拟器为船舶智能航行虚拟测试平台,进行航行控制算法测试评估。根据船舶直线段和弯曲段航行特征建立评估指标,提出航行控制算法智能评估系统的设计思路、框架结构和构建流程,初步建立虚拟仿真测试下的船舶航行控制算法智能评估体系,指出该智能评估系统所涉及的关键技术。基于以上研究,对船舶航行控制算法虚拟测试评估技术和未来改进方向进行总结。

关键词：航行控制算法智能评估专家经验库评价规则库虚拟测试平台

Magnetic field assisted Fenton reactions for the enhanced degradation of methyl blue

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Chinese Chemical Letters 2009年第1期20卷 99-101页

作者： Xiao long hao Lu Yi Zou Guang Sheng Zhang Yi Bo Zhang Laboratory of Environmental Pollution Prevention School of Environmental and Civil Engineering Jiangnan University Wuxi 214122 China

Magnetic field was tentatively introduced into Fenton reactions system for the degradation and discoloration of methyl blue as the represent of organic chemical dye, which was a bio-refractory organic pollutant in industry wastewater. It was found that under optimal Fenton reaction conditions, with the assistant of magnetic field in Fenton reactions, the degradation rate of methyl blue, the decomposition rate of H2O2 and the conversion rate of Fe^2＋ were accelerated, the extent of them would be improved by the increase of magnetic field intensity. Meanwhile, the mineralization of methyl blue （CODer） was improved by over 10% with magnetic field.

关键词： Magnetic field Fenton reactions Methyl blue Dye

Progress in immunotherapy for neuroendocrine neoplasm of the digestive system

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World Journal of Gastroenterology 2023年第26期29卷 4174-4185页

作者： Wei-Xuan Pan Xin-Mu Zhang Shao-long hao Wei Han Department of General Surgery Beijing Luhe HospitalCapital Medical UniversityBeijing 101100China Department of Liver Surgery State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Neuroendocrine neoplasms(NENs)are rare heterogeneous tumors that can develop in almost any organ,with the digestive organs,including the gastrointestinal tract and pancreas being the most commonly affected *** the fact that advances in initial therapies have progressed,there is presently no recognized effective treatment for advanced *** checkpoint inhibitors(ICIs)have shown superior efficacy in treating several types of solid *** their successful role in the treatment of partial NENs,such as small cell lung cancer,and Merkel cell carcinoma,the role of ICIs in most of the NENs remains ***,due to their specific anti-tumor mechanisms and acceptable safety profile,ICIs are a promising avenue for further study in NENs *** clinical trials have illustrated that combination therapy with ICI is more efficient than monotherapy,and multiple clinical trials are constantly ongoing to evaluate the efficacy and safety of these combination ***,the purpose of this review is to provide a comprehensive summary of the clinical progress of immunotherapy in NENs affecting the digestive system,with a specific emphasis on the application of programmed cell death protein 1/programmed death receptor ligand 1 ***,this review has an exploration of the potential beneficiary population and the inherent value of utilizing immunotherapy in the management of NENs.

关键词： Immunotherapy PD-1 inhibitor Neuroendocrine neoplasm Neuroendocrine tumor Neuroendocrine carcinoma Gastrointestinal Pancreatic

Dynamic Pendulum Effect of an Exceptionally Flexible Pillared-Layer Metal-Organic Framework

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Chinese Journal of Chemistry 2021年第10期39卷 2718-2724页

作者： hao-long Zhou Jie Bai Xiao-Yun Tian Zong-Wen Mo Xiao-Ming Chen MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistrySun Yat-Sen UniversityGuangzhouGuangdong510275 China Department of Chemistry ond Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantouGuangdong 515063China

Main observation and conclusion Magnifying the controllable directional motions of molecular machines to the macroscopic levels is a significant topic for *** metal–organic frameworks with long-range order and responsive structural transformation under external stimuli may be an appropriate platform for achieving the *** taking advantage of the single-crystal to single-crystal manner of soft porous crystals,we utilize single-crystal X-ray diffraction to directly observe the dynamic structural inversion of a new three-fold interpenetrated pillared-layer metal-organic framework[Co(edba)(bpy)](MCF-83,H2edba=4,4’-(ethyne-1,2-diyl)dibenzoic acid,bpy=4,4’-bipyridine).More interestingly,the dynamic inversions of the pillars and layers are selectively guest-controllable and independent,allowing precise control of the directional shape changes,which is the key of constructing intelligent materials to accomplish a complex *** mechanism is further studied by combining the X-ray diffraction analyses,sorption measurements and molecular simulations.

关键词： Porous coordination polymers Metal-organic frameworks Structural transformation X-ray diffraction Adsorption

Clinical Performance of SARS-CoV-2 IgG and IgM Tests Using an Automated Chemiluminescent Assay

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Current Medical Science 2021年第2期41卷 318-322页

作者： Jin-an ZHOU hao-long ZENG Ling-yan DENG Hui-jun LI Department of Blood Transfusion Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Laboratory Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Serology tests for viral antibodies provide an important tool to support nucleic acid testing for diagnosis of the novel coronavirus disease 2019(COVID-19)and is useful for documenting previous exposures to SARS-CoV-2,the etiological agent of *** sensitivities of the chemiluminescent SARS-CoV-2 IgG/IgM immunoassay were assessed by using serum samples collected from 728 patients testing positive for SARS-CoV-2 *** specificity was evaluated on a panel of 60 serum samples from non-COVID-19 patients with high levels of rheumatoid factor,antinuclear antibody,or antibodies against Epstein-Barr virus(EBV),cytomegalovirus(CMV),mycoplasma pneumonia,human respiratory syncytial virus(RSV),adenovirus,influenza A or influenza *** imprecision and interference were assessed by adopting the Clinical and Laboratory Standards Institute(CLSI)EP15-A2 and EP7-A2,*** between 1 and 65 days after onset of symptoms were 94.4%and 78.7%,for IgG and IgM test,*** sensitivity increased with the time after symptom onset,and rose to the top on the 22nd to 28th *** total imprecision(CVs)was less than 6.0%for IgG and less than 6.5%for *** cross-reactions with antibodies against EBV,CMV,mycoplasma pneumonia,human RSV,adenovirus,influenza A or influenza B were *** data suggested the chemiluminescent SARS-CoV-2 IgG and IgM,assay with reliable utility and sensitivity,could be used for rapid screening and retrospective surveillance of COVID-19.

关键词： COVID-19 SARS-CoV-2 IgG IgM chemiluminescence

Substituent engineering of covalent organic frameworks modulates the crystallinity and electrochemical reactivity

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Journal of Energy Chemistry 2022年第2期31卷 490-496页

作者： Jing Ning Yang Gao Xingdi Cao Hongtao Wei Bin Wang long hao Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdao 266109ShandongChina Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

Covalent organic frameworks(COFs)are emerging as powerful electrochemical energy storage/conversion materials benefiting from the controlled pore and chemical structures,which are usually determined by the regulation of the molecular building *** contrast,the substituents are not considered significant for the electrochemical reactivity as they are usually removed during carbonization,which is necessary for improving the electrical conductivity of an electrode *** we show that the substituents play key roles not only in synthesizing COFs but also in controlling the COF structures during carbonization and thus the related electrochemical *** characteristic substituents were used when synthesizing a new COF structure and it was found that electron-withdrawing strength of the substituents significantly influences the crystallinity of the COFs by tuning the reactivity of building blocks,or even determines whether the crystalline COF can be ***,the differences in chemical groups,sizes,and thermal stabilities of the substituents result in varied pore-collapse behaviors and the structures of the carbonized COFs,which show diverse effects on the electrochemical *** optimal material shows the highest surface area of 2131 m^(2)/g,rich pores around 1 nm,and the highest ratio of sp^(2) carbon among the samples,corresponding to the largest double-layer specific capacity over 125 F/g in an ionic liquid electrolyte,while another material with the lowest surface area and N-doping level exhibits a high H_(2)O_(2) production selectivity over 80%through selective oxygen *** study shows guiding significance for the design of building blocks and substituents for COFs and further the carbonized carbons,and also exhibits the great potential of substituent engineering in modulating the electrochemical reactivity.

关键词： Covalent organic framework Substituent engineering Crystallinity Electrochemical reactivity

Controlled cooling of an aluminum alloy casting based on 3D printed rib reinforced shell mold

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China Foundry 2018年第3期15卷 210-215页

作者： hao-long Shangguan Jin-wu Kang Ji-hao Yi Cheng-yang Deng Yong-yi Hu Tao Huang School of Materials Science and Engineering Key Laboratory for Advanced Materials Processing Technology Tsinghua University Beijing 100084 China Beijing DRUCK Technology Development Co. Ltd. Beijing 100029 China

3D printing technology has been used for sand molding and core printing, but they simply substitute the traditional molding and core making method without changing the shape or size of the sand mold(core) and their dense structure. In this study, a new type of hollow mold based on 3D printing is presented. The new type of mold is a rib reinforced thickness-varying shell mold. This mold design can realize the controlled cooling of castings, i.e., different cooling rates at different areas, and improve the temperature uniformity of a casting after its solidifi cation. Therefore, the performance of castings can be improved and their residual stress and deformation can be reduced. This kind of new mold was applied to a stress frame of A356 aluminum alloy. The 3D printed rib reinforced thickness-varying shell mold was compared with the traditional dense mold, and the castings obtained by these two kinds of molds were also compared. The experimental results showed that the rib reinforced shell mold increased the cooling rate of the casting by 30%, tensile strength by 17%, yield strength by 11%, elongation by 67%, and decreased its deformation by 43%, while sand consumption was greatly reduced by 90%.

关键词： rib reinforced thickness-varying shell mold 3D printing casting solidification cooling