摘要：This paper presents a new design procedure for the networks with multiple resources, such as hydrogen and water, of different qualities. The minimum consumption targets of the resources and pinch-causing sources can be identified as well during design. The objective of this work is to reduce the consumption of the resources with higher quality due to their higher cost. A few examples are investigated to show the proposed method. For a net-work of single resource with single contaminant, there is often only one pinch point for the resource. On the other hand, for a network of multiple resources with single contaminant, there might be a few different pinch points. Each resource might have its own pinch point, if its amount is sufficient. The contaminant concentration of the pinch-causing source for a resource with lower concentration will be below that of the higher-concentration resource(s).

摘要：A heterogeneous wireless sensor network comprises a number of inexpensive energy constrained wireless sensor nodes which collect data from the sensing environment and transmit them toward the improved cluster head in a coordinated way. Employing clustering techniques in such networks can achieve balanced energy consumption of member nodes and prolong the network *** classical clustering techniques, clustering and in-cluster data routes are usually separated into independent operations. Although separate considerations of these two issues simplify the system design, it is often the non-optimal lifetime expectancy for wireless sensor networks. This paper proposes an integral framework that integrates these two correlated items in an interactive entirety. For that,we develop the clustering problems using nonlinear programming. Evolution process of clustering is provided in simulations. Results show that our joint-design proposal reaches the near optimal match between member nodes and cluster heads.

摘要：A series of 3-substituedmethylenethiochroman-4-ones was designed and synthesized, and their structures were confirmed by 1H NMR, 13C NMR, MS, IR, UV and elemental analysis. The results of their anticancer activity studies show that almost all 3-chloromethylenethiochroman-4-ones exhibit high anticancer activities and their activities are all better than reference cisplatin. Their IC50 against cancer cells is in a range of 0.80―9.17 μg/mL. Thus they could be promising candidates for anticancer drugs. However, compound 5 has no activity against cancer cells, thus chloromethylene at the 3 position of thiochroman-4-ones seems to play an important role in observed anticancer activities.

摘要：For a series plug-in hybrid electric vehicle,higher working efficiency can be achieved by the drive system with two small motors in parallel than that with one big motor ***,the overly complex structure will inevitably lead to a substantial increase in the development *** improve the system price-performance ratio,a new kind of series-parallel hybrid system evolved from the series plug-in hybrid system is *** to the technical parameters of the selected components,the system model is established,and the vehicle dynamic property and pure electric drive economy are *** on the dynamic programming,the energy management strategy for the drive system under the city driving cycle is developed,and the superiority validation of the system is *** the studied vehicle driven by the designed series-parallel plug-in hybrid system,compared with the one driven by the described series plug-in hybrid system,the dynamic property is significantly improved because of the multi-power coupling,and the fuel consumption is reduced by 11.4%with 10 city driving *** a word,with the flexible configuration of the designed hybrid system and the optimized control strategy of the energy management,the vehicle performance can be obviously improved.

摘要：The effective index of the cladding fundamental space-filling mode in photonic crystal fiber (PCF) is simulated by the effective index method. The variation of the effective index with the structure parameters of the fiber is achieved. For the first time, the relations of the V parameter of Yb3+-doped PCF with the refractive index of core and the structure parameters of the fiber are provided. the single-mode characteristics of large-core Yb3+-doped photonic crystal fibers with 7 and 19 missing air holes in the core are analyzed. The large-core single-mode Yb3+-doped photonic crystal fibers with core diameters of 50 μm, 100 μm and 150 μm are designed. The results provide theory instruction for the design and fabrication of fiber.

摘要：Several novel C-pseudonucleosides containing thiazolidin-4-one and phenyl connected by acetamide bond were rationally designed and easily synthesized at room temperature by using the unprotected sugar aldehyde as the starting material. The effects of the compounds on Con A-induced T cell proliferation were evaluated at five concentrations of 5, 10, 25, 50, and 100 mmol/L Interestingly,compounds 7a and 8a（n = 2, R = H） exhibited immunostimulating activities, while compounds 5a, 6a（n = 1, R = H） and 7b, 8b（n = 2, R = CH3） showed immunosuppressive activities. Another two compounds 5 b and 6b（n = 1, R = CH3） had no immunomodulating activities. These initial biological results suggested that subtle structural changes to the phenyl and acetamide bond of C-pseudonucleosides could have a significant effect on T cell proliferation bias, although it was difficult to formulate a rigorous structureactivity relationship based on the observed activities.

摘要：通过2个电子参数(结合次数Bo_(t)和d轨道能级Mdt)提出了新设计的α型钛(α-Ti)合金。新设计合金Ti-5Al-4Zr-3.6Sn、改性合金Ti-5Al-3Sn-1.9Zr和参考合金Ti-5Al-2.5Sn具有相同的Bo_(t)值(3.847)以及不同的Mdt值(2.430,2.426,2.422)。测试了3种α-Ti合金的极限抗拉伸强度(σ_(UTS))、断裂应变(ɛ_(f))和热盐腐蚀性能。3种α-Ti合金均采用冷坩埚悬浮熔炼技术进行制备。结果表明,3种合金样品均具有均匀的微观结构。在3种α-Ti合金中测量到的α单相晶粒尺寸约为600μm。Ti-5Al-4Zr-3.6Sn合金的σ_(UTS)和ɛ_(f)值为801 MPa和16%,Ti-5Al-3Sn-1.9Zr合金的σ_(UTS)和ɛ_(f)值为708 MPa和15%,Ti-5Al-2.5Sn合金的σ_(UTS)和ɛ_(f)值为603 MPa和15%。热盐腐蚀测试进行28.8ks后显示Ti-5Al-4Zr-3.6Sn、Ti-5Al-3Sn-1.9Zr和Ti-5Al-2.5Sn合金的失重率为2.61%、2.83%和3.10%。σ_(UTS)、ɛ_(f)和耐热盐腐蚀结果表明,新设计合金Ti-5Al-4Zr-3.6Sn是一种有实际应用潜力的钛合金材料。

摘要：An easy and delicate approach using cheap carbon source as conductive materials to construct 3D sequential porous structural Na3V2(PO4)3/C(NVP/C)with high performance for cathode materials of sodium ion battery is highly *** this paper,the NVP/C with 3D sequential porous structure is constructed by a delicate approach named as“cooking porridge”including evaporation and calcination ***,during evaporation,the viscosity of NVP/C precursor is optimized by controlling the adding quantity of citric acid,thus leading to a 3D sequential porous structure with a high specific surface ***,the NVP/C with a 3D sequential porous structure enables the electrolyte to interior easily,providing more active sites for redox reaction and shortening the diffusion path of electron and sodium ***,benefited from its unique structure,as cathode material of sodium ion batteries,the 3D sequential porous structural NVP/C exhibits high specific capacities(115.7,88.9 and 74.4 mA·h/g at current rates of 1,20 and 50 C,respectively)and excellent cycling stability(107.5 and 80.4 mA·h/g are remained at a current density of 1 C after 500 cycles and at a current density of 20 C after 2200 cycles,respectively).

摘要：改进接触传热测量装置,利用有限元模拟镁合金轧制过程辊缝界面的瞬态换热特性,以准确分析温度、压力和粗糙度对接触传热系数的耦合影响。结果表明,接触传热存在2个明显的临界阈值。当温度在150℃以下且界面压力低于22.1 MPa时,存在良好的线性规律。当超过第一阈值后,接触传热明显增强,呈现显著的非线性特征。另外,当界面压力超过50 MPa(第二阈值)且温度超过300℃时,接触传热很快趋于稳定。显然,此时的第二阈值与镁合金带材表面摩擦峰的弹塑性变形直接相关,通过增加微接触面积和摩擦峰的交互扩散,从而形成高压接触传热。基于这一现象的规律特征,有助于精确控制辊缝的接触界面温度,便于设计合适的轧制参数或优化轧制工艺。

摘要：A series of 2-aryl-3-(4,5,6-trimethylpyrimidin-2-yl)thiazolidin-4-ones(1a–1c)and their derivatives bearing a lipophilic substituent,like acetoxy group(3a–3c),propionyloxy group(4a–4c),methyl(5d and 5e)at C-5 on thiazolidin-4-one ring were designed,synthesized and evaluated for their HIV-RT inhibitory *** self-catalyzed Pummerer reaction,compounds 3a–3c and 4a–4c were obtained in good yield(63.1%–75.2%).Prelimin-ary anti-HIV-RT test of these derivatives indicated that compounds 1a–1c,4b(propionyloxy group at C-5)showed moderate HIV-RT inhibitory activity and com-pounds 5d and 5e with methyl at C-5 showed a weak HIV-RT inhibitory *** activity relationship analysis suggested that the substituted groups on C-5 would be unfavorable to anti-HIV-RT activity and that the steric effect might play a critical role in the anti-HIV RT activity.