Reevaluating Adversarial Examples in Natural Language

State-of-the-art attacks on NLP models lack a shared definition of a what constitutes a successful attack. We distill ideas from past work into a unified framework: a successful natural language adversarial example is a perturbation that fools the model and follows some linguistic constraints. We then analyze the outputs of two state-of-the-art synonym substitution attacks. We find that their perturbations often do not preserve semantics, and 38% introduce grammatical errors. Human surveys reveal that to successfully preserve semantics, we need to significantly increase the minimum cosine similarities between the embeddings of swapped words and between the sentence encodings of original and perturbed sentences.With constraints adjusted to better preserve semantics and grammaticality, the attack success rate drops by over 70 percentage points.Comment: 15 pages; 9 Tables; 5 Figure

The Electronics and Data Acquisition System for the PandaX-I Dark Matter Experiment

We describe the electronics and data acquisition system used in the first phase of the PandaX experiment -- a 120 kg dual-phase liquid xenon dark matter direct detection experiment in the China Jin-Ping Underground Laboratory. This system utilized 180 channels of commercial flash ADC waveform digitizers. This system achieved low trigger threshold ($<$1 keV electron-equivalent energy) and low deadtime data acquistion during the entire experimental run.Comment: 12 pages, 6 figures, version as accepted by JINS

Viscosity measurements at high temperature and high pressure: A novel technique

The extensive numerical modelling of transport phenomena was performed for the melt growth of mercury cadmium telluride. To increase the fidelity of modelling the kinematic viscosity of liquid Hg(1-x)Cd(x)Te was determined at various compositions in the range of x between 0 and 0.2 and at temperatures around and below the respective melting point. The phase diagram of Hg(1-x)Cd(x)Te shows that for this range the melting point varies from 670 C for pure HgTe to 790 C at x=0.2. The vapor pressure above the melt varies correspondingly from 15 to about 40 atm. Hence, the measurement of viscosities in this system requires a technique that allows for combinations of high temperatures and pressures. In addition, a closed isothermal system is required. The high pressure melt container must also be inert to molten Hg(1-x)Cd(x)Te to avoid possible errors from contamination of the liquid. A novel technique that largely circumvents the above experimental problems is described. Its theory is also presented

From training to education. Lifelong learning in China

Lifelong learning was nothing unusual in the Chinese tradition. There was no age limit for education in ancient China, although education in those days was mainly for examinations, which were the testing ground for officials. A system of adult education was established in the 1950s, but that was to complement the formal education system as an instrument to implement state manpower planning. Lifelong education as a modern notion was introduced to China only at the end of the 1970s immediately after the Cultural Revolution. The notion did not gain much ground when education was closely associated with state manpower plans, and individuals did not have much room for personal development. The break away from strict manpower planning in the early 1980s has given rise to individual aspirations for education. Such aspirations have integrated with the long tradition of self-motivation in learning and have given rise to spectacular expansion in all kinds of adult education. While the motives for such learning are still very much related to jobs and incomes, alternative objectives for learning are fast developing outside the formal sectors of education. This article analyses the recent development of lifelong education in China, and uses Shanghai, the most developed city, as an illustration.postprin