摘要：Geomechanical parameters are complex and *** order to take this complexity and uncertainty into account,a probabilistic back-analysis method combining the Bayesian probability with the least squares support vector machine(LS-SVM) technique was *** Bayesian probability was used to deal with the uncertainties in the geomechanical parameters,and an LS-SVM was utilized to establish the relationship between the displacement and the geomechanical *** proposed approach was applied to the geomechanical parameter identification in a slope stability case study which was related to the permanent ship lock within the Three Gorges project in *** results indicate that the proposed method presents the uncertainties in the geomechanical parameters reasonably well,and also improves the understanding that the monitored information is important in real projects.

摘要：An adjustable ejector expansion device for a CO2 heat pump water heater (HPWP) is proposed to improve the system performance. It has been designed to investigate experimentally the effects of the motive nozzle throat area of the ejector, entrained flow pressure, back pressure and primary flow pressure on the entrainment ratio. Experiments based on different motive nozzle throat areas were conducted and the results of the prototype ejector using CO2 as working fluid are presented. The results show that an adjustable ejector can achieve high performance and work well in a wide range of working conditions.

摘要：Several different alkoxycarbonyl-substituted 2-benzoxazolinone moieties have been incorporated into a tetrahy- droisoindoline-1,3-dione scaffold to provide 25 compounds （1a-lu and 2a-2d）. The structures of these compounds were confirmed by 1H and 13C NMr, HrMS and X-ray single-crystal diffraction. Some of these compounds （1g, 1h, 1j, 1k） exhibited excellent herbicidal activities against Abutilon theophrasti, Amaranthus retroflexus and Eehinochloa crus-galli at a rate of 375 g AI·ha^-1. Among them, compounds lh and 1j displayed the best post-emergence herbicidal effect against Abutilon theophrasti with Ed50 values of 1.8 and 5.3 g AI·ha^-1, respectively, which are superior to that of the commercial acifluorfen （44.3 g AI·ha^-1）. Field trials demonstrated that compound lh exhibited similar herbicidal activity to a high concentration atrazine, and found to be safer for maize than atrazine. The results of this study therefore show that compound lh could potentially be used as a post-emergence herbicide for maize fields.

摘要：The main reason for the high strength in near-βtitanium alloys is the ultrafine precipitation of the acicular secondary a phase in theβ*** purpose of this study is to use the pseudo-spinodal mechanism to obtain the ultrafine a phase for the design of a new high-strength near-γtitanium *** calculations and TC21-(TC21+15 Mo)diffusion couple composition gradient experiments were used to demonstrate that TC21+3 Mo alloy can undergo a pseudo-spinodal decomposition to obtain the ultrafine a phase,resulting in a high-strength *** adjusting the heat treatment process to obtain a bimodal microstructure,the alloy exhibits a good balance between ultimate tensile strength(1351 MPa)and plasticity(8.5%strain).Thus,it was demonstrated that the pseudospinodal mechanism combined with a high-throughput diffusion couple technique is an effective method for designing high-strength titanium alloys.

摘要：due to a novel mode action,low toxicity to mammals and low residue characteristics,phthalic acid diamides have aroused considerable interests in agricultural *** introduction of N-cyano,N-trifluoroacetyl,N-carbamoylsulfiliminyl and sulfoximinyl substituents into phthalamides,12 novel derivatives containing trifluoromethyl moiety were designed and *** title compounds were characterized by ^(1)H NMr and high-resolution mass *** preliminary results of biological activity assessment indicated that some title compounds exhibited moderate to good insecticidal activities against oriental armyworm(Pseudaletia separata Walker).In particular,Va gave higher activity against oriental armyworm and diamondback *** present work reported that the new trifluoromethylated diamides incorporating N-trifluoroacetylsulfoximinyl moieties are potential lead compounds for further structure optimization,providing some insight into the relating structure-activity relationship.

摘要：Two series of novel anthranilic diamides containing oxime ester and diacylhydrazine moieties were designed and *** structures were characterized by melting points,1H NMr,13C NMr and high resolution mass spectrometry（HrMS）.The single crystal structure of compound 7e was determined by X-ray diffraction and their evaluated insecticidal activity against oriental armyworm（Mythimna separata） indicates that some of the compounds exhibited moderate insecticidal *** the 20 compounds,6a and 6b show 100％ larvicidal activity against Mythimna separate Walker at the test concentration of 100 mg/L.

摘要：A series of novel 5-（trifluoromethyl）-1H-pyrazole-4-carboxamide derivatives（6a–6n, 7a, 7b, and 8a-8f）were synthesised by placing the amide bond at the 4-position of the pyrazole ring. These derivatives differed from the structure of chlorantraniliprole analogues with the amide bond at the 5-position of the pyrazole ring. Preliminary bioassay results revealed that a few title compounds exhibited good insecticidal activities against lepidopteran pests, such as Plutella xylostella, Mythimna separate, Heliothis armigera, and Ostrinia nubilalis. Some title compounds also elicited broad-spectrum insecticidal activities against dipterous insects including Culex pipiens pallens after altering the amide position. Similar to pyrazole-5-carboxamide analogues, compounds 6b and 6e showed 100% insecticidal activity against P. xylostella, C. pipiens pallens, and M. separate at concentrations of 200, 2, and 200 mg/m L, *** finding suggested that 5-（trifluoromethyl）-1H-pyrazole-4-carboxamide derivatives are potential alternative insecticides for management of agriculture pests.

摘要：Integrating poly（lactic acid） （PLA）, glycolic acid （GA） and ethylene glycol （EG） will hopefully result in a novel copolymer that combines such advantages as fastened and controllable release rate and improved flexibility together with good biocompatibility. In this study, p-dioxanone （PdO） was employed to copolymerize with dL-lactide （LA） via ring-opening melt polymerization using Sn（Oct）2 as an initiator and ethylene glycol as a co-initiator. The obtained degradable macrodiols （HO-P（LA-co-PdO）-OH） were just such a copolymer consisting of PLA, GA and EG. 1HNMr was employed to characterize the copolymers, and the effect of PdO/LA molar ratios in the feedstock on the molecular weights of HO-P（LA-co-PdO）-OH was investigated by means of endhydroxyl analysis, 1H NMr or GPC-MALLs. The results confirmed the successful synthesis of HO-P（LA-co-PdO）-OH and revealed that one end-hydroxyl of the micarodiols was donated by LA or PdO and the other one by the co-initiator EG. In addition, the molecular weights of HO-P（LA-co-PdO）-OH increased with decreasing PdO/LA ratios.

摘要：A series of novel poly（urethane-urea）（PUU） was synthesized from poly（lactide-co-p-dioxanone） macrodiol（HO-P（LA-co-PdO）-OH）, hexamethylene diisocyanate（HdI） and butanediamine（BdA）.The obtained PUU,which is recorded as P（LA-co-PdO）-PUU here,may demonstrate enhanced phase separation and thus improved shape memory *** was employed to characterize the copolymers,and the effects of NCO/OH molar ratios on Tg of PUU was investigated by means of differential scanning calorimetry （dSC）.The results revealed the successful synthesis of P（LA-co-PdO）-*** addition,the Tg of P（LA-co-PdO）-PUU increased from 37.9℃to 44.2℃with the increase NCO/OH ratios from 1.1 to *** P（LA-co-PdO）-PUU with Tg close to body temperature will have potential applications as shape memory polymers in biomedical fields,especially in minimally invasive surgery.

摘要：This paper discusses the developement and investigation of a silica microbubble resonator(MBr) that is optimized to cancel mode dispersion with material dispersion, at a wavelength of approximately 1550 nm and maintain a quality factor of an optical mode as large as 5.4 × 10~7. Benefitting from the near-zero dispersion and high quality factor, a primary optical comb is generated in the MBr using cascaded four-wave mixing processes, which span over 300 nm with several tens of teeth. Furthermore, the frequency comb could be gradually tuned by mechanically stretching the MBr. This tunable Kerr comb has multiple potential applications in precision measurements and sensing applications, such as molecular spectroscopy and ranging.